Lawn mower and cutting deck lifting / lowering device

Abstract

Provided are a lawn mower and a cutting deck lifting / lowering device. The lawn mower comprises a frame (1), a seat, a cutting deck (3) and a cutting deck lifting / lowering device; the cutting deck lifting / lowering device comprises an operating member (11), a translation mechanism, a linkage mechanism and a gear member (10); the linkage mechanism comprises an elastic member (12) connected to the operating member (11), the elastic member (12) driving the operating member (11) to have a tendency of entering a gear recess (102). By providing the elastic member (12) between the linkage mechanism and the operating member (11), when vibration of the lawn mower causes the operating member (11) to have a tendency of moving toward a disengagement direction, the elastic member (12) pulls the operating member (11) and generates a driving force pointing toward the direction of the gear recess (102), thus avoiding the problem that the cutting deck (3) falls to the lowest point when the operating member is automatically disengaged from the gear recess (102) under abnormal road conditions such as jolts.

Description

Lawn mower and cutting table lifting device

[0001] This application claims priority from the following patent applications:

[0002] This application claims priority to Chinese patent applications filed with the China Patent Office on April 1, 2024, with application numbers 202410387160.X, 202420654370.6, 202420654366.X, and 202420654363.6. The entire contents of the above applications are incorporated by reference into this application. [Technical field]

[0003] The present invention relates to the technical field of gardening vehicles, in particular to a lawn mower and a cutting platform lifting device. [Background Technology]

[0004] Outdoor gardening vehicles generally refer to vehicles used for outdoor gardening operations, mainly including vehicles used for cutting and maintaining garden grass.

[0005] The lawn mower is one of the gardening vehicles that has developed rapidly in recent years. It is equipped with a liftable cutting platform, and a cutting knife is installed in the cutting platform to cut and maintain the grass on the ground. Due to differences in users' personal preferences and seasons, it is necessary to set multiple mowing height gears on the lawn mower; generally, the user holds the control piece and pulls it to a specific height and then deflects it to the gear slot to achieve gear shifting limit. However, since the grass is often not completely flat, there are often certain bumpy sections. The lawn mower driving on this section will cause the cutting platform to shake. At this time, the control piece may detach from the gear slot, causing the cutting platform to drop directly to the lowest point.

[0006] In view of this, it is necessary to provide a lawn mower and a cutting table lifting device to overcome the defects of the prior art. [Summary of the invention]

[0007] In view of the deficiencies in the prior art, the present invention aims to provide a lawn mower and a cutting table lifting device that can prevent the operating member from falling out of the gear slot when the lawn mower is bumpy.

[0008] The technical solution adopted by the present invention to solve the problems of the prior art is:

[0009] A cutting table lifting device is connected to the frame and cutting table of a lawn mower, comprising:

[0010] The operating member rotates around a first rotating shaft provided on the vehicle frame;

[0011] A translation mechanism connects the header and the vehicle frame and is used to limit the header to maintain a constant angle with the vehicle frame when moving;

[0012] A linkage mechanism connects the operating member and the translation mechanism, so that the header moves upward or downward when the operating member rotates around the first rotating shaft;

[0013] A shift member, comprising a shift slot and connected to the vehicle frame, wherein the operating member cannot drive the header to move when engaged with the shift slot;

[0014] The linkage mechanism comprises:

[0015] The height-adjusting shaft end plate is connected to the operating member and the first rotating shaft, and the operating member rotates around the first rotating shaft along with the height-adjusting shaft end plate;

[0016] a second rotating shaft connecting the operating member and the height adjustment shaft end plate, wherein the operating member is capable of rotating about the second rotating shaft and sliding relative to the height adjustment shaft end plate along the axial direction of the second rotating shaft, wherein the positions of the operating member rotating about the second rotating shaft include an in-gear state position engaged with the gear slot and a disengaged state position disengaged from the gear slot;

[0017] A limiting member connected to the operating member and / or the height adjustment shaft end plate, wherein the limiting member is provided with a curved surface;

[0018] An elastic member connects the operating member and the height adjustment shaft end plate. The elastic force of the elastic member causes the operating member to slide along the second rotating shaft and abut against the limiting member. The curved surface of the limiting member abuts against the operating member and generates a deflection force that deflects the operating member to a blocking state.

[0019] A further improvement scheme is: the linkage mechanism includes:

[0020] A pull rod connecting the height adjustment shaft end plate and the translation mechanism;

[0021] When the operating member rotates around the first rotating shaft, the height-adjusting shaft end plate rotates with it and pulls the pull rod to move, so that the height of the cutting platform changes.

[0022] A further improved solution is: the linkage mechanism also includes a height-adjusting swing arm connected to the first rotating shaft, and the pull rod is rotatably connected to the height-adjusting swing arm.

[0023] A further improved solution is that the force along the first rotation axis that the operating member overcomes when it is moved from the in-gear state to the out-gear state is 3N to 30N.

[0024] A further improvement is that the limiting member is a ring structure.

[0025] A further improvement is that the height adjustment shaft end plate includes a baffle perpendicular to the second rotating shaft, one end of the operating member is bent to form the second rotating shaft and passes through the baffle, the elastic member is sleeved on the second rotating shaft and the two ends of the elastic member are respectively connected to the baffle and the second rotating shaft.

[0026] A further improvement is that the shifting member includes a slide and shifting grooves are provided on both sides of the slide, the operating member slides in the slide when rotating around the first rotating axis, and enters the shifting groove on the corresponding side when rotating around the second rotating axis to either side.

[0027] A further improvement is that the limiting member is fixedly arranged on the height adjustment shaft end plate, and the operating member has a tendency to deflect and move to cooperate with the gear groove when it abuts against the curved surface of the limiting member under the action of the elastic member.

[0028] A further improvement is as follows: a threaded hole is provided on the height adjustment shaft end plate, a mounting hole is provided on the limit member, and the limit member is matched with the threaded hole of the height adjustment shaft end plate by a bolt passing through the mounting hole.

[0029] A further improvement is that the limiter is fixedly mounted on the operating member, a protrusion is provided on the surface of the height adjustment shaft end plate, and the curved surface of the limiter abuts against the protrusion under the seat of the elastic member to generate a deflection force that deflects the operating member to cooperate with the gear slot.

[0030] A further improved solution is: a mounting plate with a threaded hole is fixedly provided on the operating member, a mounting hole is provided on the limiting member, and the limiting member is matched with the threaded hole of the operating member by a bolt passing through the mounting hole.

[0031] A further improvement is that: limit members are provided on both the operating member and the height adjustment shaft end plate, and the curved surfaces of the two limit members abut against each other to generate a deflection force that causes the operating member to deflect to cooperate with the gear slot.

[0032] A further improvement is as follows: a threaded hole is provided on the height adjustment shaft end plate, a mounting plate with a threaded hole is fixedly provided on the operating member, a mounting hole is provided on the limiting member, and the limiting member is matched with the threaded holes of the height adjustment shaft end plate and the operating member through a bolt passing through the mounting hole.

[0033] A further improvement is as follows: the limiting member is provided with a protrusion with a smooth transition surface, and the surfaces of the protrusions of the two limiting members abut against each other.

[0034] A further improvement is as follows: one of the limiting parts is provided with a protrusion, the other limiting part is provided with a depression, and the surfaces of the two limiting parts provided with protrusions or depressions abut against each other; when the operating part is in the blocking state, the protrusion of one of the limiting parts abuts against the depression of the other limiting part.

[0035] A further improvement is that the cutting platform lifting device further includes a buffer member connected to the vehicle frame and the linkage assembly, so as to reduce the pulling force for lifting the cutting platform when the user pulls the operating member.

[0036] A further improvement is that the buffer member includes a tension spring whose two ends are respectively connected to the vehicle frame and the height adjustment shaft end plate, or a torsion spring whose two ends are respectively connected to the vehicle frame and the first rotating shaft.

[0037] The present invention also discloses another cutting platform lifting device, which is connected to the frame and cutting platform of the lawn mower, and includes:

[0038] The operating member rotates around a first rotating shaft provided on the vehicle frame;

[0039] A translation mechanism connects the header and the vehicle frame and is used to limit the header to maintain a constant angle with the vehicle frame when moving;

[0040] A linkage mechanism connects the operating member and the translation mechanism, so that the header moves upward or downward when the operating member rotates around the first rotating shaft;

[0041] A shift member, comprising a shift slot and connected to the vehicle frame, wherein the operating member cannot drive the header to move when engaged with the shift slot;

[0042] The linkage mechanism comprises:

[0043] The height-adjusting shaft end plate is connected to the operating member and the first rotating shaft, and the operating member rotates around the first rotating shaft along with the height-adjusting shaft end plate;

[0044] A second rotating shaft connects the operating member and the height-adjusting shaft end plate, the operating member can rotate around the second rotating shaft until it is engaged with the shift groove, and the operating member can slide relative to the height-adjusting shaft end plate along the axial direction of the second rotating shaft;

[0045] A limiting member connected to the operating member and / or the height adjustment shaft end plate, wherein the limiting member is provided with a curved surface;

[0046] An elastic member connects the operating member and the height adjustment shaft end plate. The elastic force of the elastic member causes the operating member to slide along the second rotating shaft and abut against the limiting member. The abutting force of the operating member under the action of the curved surface of the limiting member causes the operating member to have a tendency to enter the gear slot.

[0047] The present invention also discloses another cutting platform lifting device, which is connected to the frame and cutting platform of the lawn mower, and includes:

[0048] The operating member rotates around a first rotating shaft provided on the vehicle frame;

[0049] A translation mechanism connects the header and the vehicle frame and is used to limit the header to maintain a constant angle with the vehicle frame when moving;

[0050] A linkage mechanism connects the operating member and the translation mechanism, so that the header moves upward or downward when the operating member rotates around the first rotating shaft;

[0051] A shift member connected to the vehicle frame and comprising two rows of shift slots, wherein the operating member cannot drive the header to move when engaged with one of the rows of shift slots;

[0052] The linkage mechanism comprises:

[0053] The height-adjusting shaft end plate is connected to the operating member and the first rotating shaft, and the operating member rotates around the first rotating shaft along with the height-adjusting shaft end plate;

[0054] a second rotating shaft connecting the operating member and the height adjustment shaft end plate, wherein the operating member can rotate about the second rotating shaft until it is engaged with any row of shift slots, and when the operating member is rotated to between two rows of shift slots, the operating member can rotate about the first rotating shaft, and the operating member can slide relative to the height adjustment shaft end plate along the axial direction of the second rotating shaft;

[0055] A limiting member connected to the operating member and / or the height adjustment shaft end plate, wherein the limiting member is provided with two curved surfaces;

[0056] An elastic member connects the operating member and the height adjustment shaft end plate. The elastic force of the elastic member causes the operating member to slide along the second rotating shaft relative to the height adjustment shaft end plate. One of the curved surfaces of the limiting member is abutted to generate a deflection force that causes the operating member to deflect to cooperate with one of the gear slots in one column.

[0057] The present invention also discloses another cutting platform lifting device, which is connected to the frame and cutting platform of the lawn mower, and includes:

[0058] The operating member rotates around a first rotating shaft provided on the vehicle frame;

[0059] A translation mechanism connects the header and the vehicle frame and is used to limit the header to maintain a constant angle with the vehicle frame when moving;

[0060] A linkage mechanism connects the operating member and the translation mechanism, so that the header moves upward or downward when the operating member rotates around the first rotating shaft;

[0061] a shift member connected to the vehicle frame and comprising a shift slot, wherein the operating member cannot drive the header to move when engaged with the shift slot;

[0062] The linkage mechanism comprises:

[0063] The height-adjusting shaft end plate is connected to the operating member and the first rotating shaft, and the operating member rotates around the first rotating shaft along with the height-adjusting shaft end plate;

[0064] A second rotating shaft connects the operating member and the height-adjusting shaft end plate, the operating member can rotate around the second rotating shaft until it is engaged with the shift groove, and the operating member can slide relative to the height-adjusting shaft end plate along the axial direction of the second rotating shaft;

[0065] A limiting member connected to the operating member and / or the height adjustment shaft end plate, wherein the limiting member is provided with a curved surface;

[0066] An elastic member connects the operating member and the limiting member. The elastic force direction of the elastic member is parallel to the second rotating shaft. The elastic force of the elastic member has a tendency to make the operating member slide along the second rotating shaft. The curved surface of the limiting member is abutted to generate a deflection force that causes the operating member to deflect to cooperate with the gear slot.

[0067] The present invention also discloses another cutting platform lifting device, which is connected to the frame and cutting platform of the lawn mower, and includes:

[0068] The operating member rotates around a first rotating shaft provided on the vehicle frame;

[0069] A translation mechanism connects the header and the vehicle frame and is used to limit the header to maintain a constant angle with the vehicle frame when moving;

[0070] A linkage mechanism connects the operating member and the translation mechanism, so that the header moves upward or downward when the operating member rotates around the first rotating shaft;

[0071] a shift member connected to the vehicle frame and comprising a shift slot, wherein the operating member cannot drive the header to move when engaged with the shift slot;

[0072] The linkage mechanism comprises:

[0073] The height-adjusting shaft end plate is connected to the operating member and the first rotating shaft, and the operating member rotates around the first rotating shaft along with the height-adjusting shaft end plate;

[0074] A second rotating shaft connects the operating member and the height-adjusting shaft end plate, the operating member can rotate around the second rotating shaft until it is engaged with the shift groove, and the operating member can slide relative to the height-adjusting shaft end plate along the axial direction of the second rotating shaft;

[0075] Two limiting members are respectively fixed to the operating member and the height adjustment shaft end plate, and the limiting members are provided with a curved surface;

[0076] The elastic member, the connecting operating member and the height-adjusting shaft end plate are used to make the two limiting members abut against each other, and the curved surface of the limiting member is abutted to generate a deflection force that causes the operating member to deflect to match the shift groove.

[0077] The present invention also discloses another cutting platform lifting device, which is connected to the frame and cutting platform of the lawn mower, and includes:

[0078] The operating member rotates around a first rotating shaft provided on the vehicle frame;

[0079] A translation mechanism connects the header and the vehicle frame and is used to limit the header to maintain a constant angle with the vehicle frame when moving;

[0080] A linkage mechanism connects the operating member and the translation mechanism, so that the header moves upward or downward when the operating member rotates around the first rotating shaft;

[0081] a shift member connected to the vehicle frame and comprising a shift slot, wherein the operating member cannot drive the header to move when engaged with the shift slot;

[0082] The linkage mechanism comprises:

[0083] The height-adjusting shaft end plate is connected to the operating member and the first rotating shaft, and the operating member rotates around the first rotating shaft along with the height-adjusting shaft end plate;

[0084] A second rotating shaft connects the operating member and the height-adjusting shaft end plate, the operating member can rotate around the second rotating shaft until it is engaged with the shift groove, and the operating member can slide relative to the height-adjusting shaft end plate along the axial direction of the second rotating shaft;

[0085] A limiting member is fixed to the height adjustment shaft end plate, and the limiting member is provided with a curved surface;

[0086] The elastic member connects the operating member and the height-adjusting shaft end plate to enable the operating member to abut against the curved surface of the limiting member. The curved surface of the limiting member is abutted to generate a deflection force that causes the operating member to deflect to cooperate with the shift groove.

[0087] The present invention also discloses another cutting platform lifting device, which is connected to the frame and cutting platform of the lawn mower, and includes:

[0088] The operating member rotates around a first rotating shaft provided on the vehicle frame;

[0089] A translation mechanism connects the header and the vehicle frame and is used to limit the header to maintain a constant angle with the vehicle frame when moving;

[0090] A linkage mechanism connects the operating member and the translation mechanism, so that the header moves upward or downward when the operating member rotates around the first rotating shaft;

[0091] a shift member connected to the vehicle frame and comprising a shift slot, wherein the operating member cannot drive the header to move when engaged with the shift slot;

[0092] The linkage mechanism comprises:

[0093] The height-adjusting shaft end plate is connected to the operating member and the first rotating shaft, and the operating member rotates around the first rotating shaft along with the height-adjusting shaft end plate;

[0094] A second rotating shaft connects the operating member and the height-adjusting shaft end plate, the operating member can rotate around the second rotating shaft until it is engaged with the shift groove, and the operating member can slide relative to the height-adjusting shaft end plate along the axial direction of the second rotating shaft;

[0095] A limiting member is fixed to the operating member, and the limiting member is provided with a curved surface;

[0096] The elastic part connects the operating part and the height adjustment shaft end plate to make the curved surface of the limiting part abut against the height adjustment shaft end plate. The surface of the height adjustment shaft end plate is provided with a protrusion. The curved surface of the limiting part is abutted by the protrusion to generate a deflection force that causes the operating part to deflect to cooperate with the gear slot.

[0097] The present invention also discloses another cutting platform lifting device, which is connected to the frame and cutting platform of the lawn mower, and includes:

[0098] A translation mechanism connects the header and the vehicle frame and is used to limit the header to maintain a constant angle with the vehicle frame when moving;

[0099] Control parts;

[0100] a shift member connected to the vehicle frame and comprising a shift slot, wherein the operating member cannot drive the header to move when engaged with the shift slot;

[0101] A linkage mechanism is configured to rotatably mount an operating member to the vehicle frame, so that the operating member rotates about a first rotation axis to drive the header height to change, and the operating member rotates about a second axis between positions engaged with and disengaged from the gear slot; the linkage mechanism includes:

[0102] A limiting member, the surface of which is configured with a curved surface;

[0103] The elastic member causes the curved surface of the limiting member to abut against and drive the operating member to rotate around the second axis under the biasing force until the operating member is matched with the shifting groove.

[0104] The present invention also discloses another cutting platform lifting device, which is connected to the frame and cutting platform of the lawn mower, and includes:

[0105] A translation mechanism connects the header and the vehicle frame and is used to limit the header to maintain a constant angle with the vehicle frame when moving;

[0106] Control parts;

[0107] A shift member connected to the vehicle frame and comprising two rows of shift slots, wherein the operating member cannot drive the header to move when engaged with one of the rows of shift slots;

[0108] A linkage mechanism is configured to rotatably mount an operating member to the vehicle frame, so that the operating member rotates about a first rotation axis to drive the header height to change, and the operating member rotates about a second axis between positions engaged with and disengaged from the gear slot; the linkage mechanism includes:

[0109] A limiting member, the surface of which is configured with a curved surface;

[0110] The elastic member causes the curved surface of the limiting member to be abutted and drives the operating member to rotate around the second axis under the biasing force until the operating member is matched with the shift slot in the nearest row.

[0111] The present invention also discloses a lawn mower, comprising:

[0112] Frame;

[0113] The cutting platform is set on the lower side of the frame and is used for cutting grass;

[0114] The battery pack is connected to the frame and is used to supply power to the header;

[0115] The header lifting device comprises:

[0116] The operating member rotates around a first rotating shaft provided on the vehicle frame;

[0117] A translation mechanism connects the header and the vehicle frame and is used to limit the header to maintain a constant angle with the vehicle frame when moving;

[0118] A linkage mechanism connects the operating member and the translation mechanism, so that the header moves upward or downward when the operating member rotates around the first rotating shaft;

[0119] A shift member, comprising a shift slot and connected to the vehicle frame, wherein the operating member cannot drive the header to move when engaged with the shift slot;

[0120] The linkage mechanism comprises:

[0121] The height-adjusting shaft end plate is connected to the operating member and the first rotating shaft, and the operating member rotates around the first rotating shaft along with the height-adjusting shaft end plate;

[0122] a second rotating shaft connecting the operating member and the height adjustment shaft end plate, wherein the operating member is capable of rotating about the second rotating shaft and sliding relative to the height adjustment shaft end plate along the axial direction of the second rotating shaft, wherein the positions of the operating member rotating about the second rotating shaft include an in-gear state position engaged with the gear slot and a disengaged state position disengaged from the gear slot;

[0123] A limiting member connected to the operating member and / or the height adjustment shaft end plate, wherein the limiting member is provided with a curved surface;

[0124] An elastic member connects the operating member and the height adjustment shaft end plate. The elastic force of the elastic member causes the operating member to slide along the second rotating shaft and abut against the limiting member. The curved surface of the limiting member abuts against the operating member and generates a deflection force that deflects the operating member to a blocking state.

[0125] A further improvement scheme is: the translation mechanism includes a front attachment and a rear attachment hinged at both ends to the frame and the cutting table, the rear attachment is composed of rear attachment plates located on the left and right sides of the frame, the front attachment, frame, rear attachment, and cutting table form a parallelogram structure, so that the angle between the cutting table and the frame remains unchanged when moving; the rear attachment is located in the area outside the left and right edges of the frame.

[0126] A further improvement is that the distance between the rear hanging member and the outer edge of the frame in the left and right directions of the frame is in the range of 0 to 50 mm.

[0127] A further improvement is that the ratio of the distance between the two rear mounting plates to the cutting width of the mower is 0.3 to 0.8.

[0128] A further improvement is that the ratio of the distance between the two rear mounting plates to the cutting width of the mower is 0.38 to 0.66.

[0129] The present invention also discloses another lawn mower, comprising:

[0130] Frame;

[0131] The cutting platform is set on the lower side of the frame and is used for cutting grass;

[0132] The battery pack is connected to the frame and is used to supply power to the header;

[0133] The header lifting device comprises:

[0134] The operating member rotates around a first rotating shaft provided on the vehicle frame;

[0135] The translation mechanism includes a front attachment and a rear attachment hinged at both ends to the vehicle frame and the header. The rear attachment is composed of rear attachment plates located on the left and right sides of the vehicle frame. The front attachment, the vehicle frame, the rear attachment, and the header form a parallelogram structure, so that the header maintains a constant angle with the vehicle frame when moving.

[0136] A linkage mechanism connects the operating member and the translation mechanism, so that the header moves upward or downward when the operating member rotates around the first rotating shaft;

[0137] A shift member, comprising a shift slot and connected to the vehicle frame, wherein the operating member cannot drive the header to move when engaged with the shift slot;

[0138] The linkage mechanism comprises:

[0139] The height-adjusting shaft end plate is connected to the operating member and the first rotating shaft, and the operating member rotates around the first rotating shaft along with the height-adjusting shaft end plate;

[0140] A second rotating shaft connects the operating member and the height-adjusting shaft end plate, the operating member can rotate around the second rotating shaft until it is engaged with the shift groove, and the operating member can slide relative to the height-adjusting shaft end plate along the axial direction of the second rotating shaft;

[0141] A limiting member connected to the operating member and / or the height adjustment shaft end plate, wherein the limiting member is provided with a curved surface;

[0142] An elastic member connects the operating member and the height adjustment shaft end plate. The elastic force of the elastic member causes the operating member to slide along the second rotating shaft and abut against the limiting member. The abutting force of the operating member under the action of the curved surface of the limiting member causes the operating member to have a tendency to enter the gear slot.

[0143] The present invention also discloses another lawn mower, comprising:

[0144] Frame;

[0145] The cutting platform is set on the lower side of the frame and is used for cutting grass;

[0146] The battery pack is connected to the frame and is used to supply power to the header;

[0147] The header lifting device comprises:

[0148] The operating member rotates around a first rotating shaft provided on the vehicle frame;

[0149] The translation mechanism includes a front attachment and a rear attachment hinged at both ends to the vehicle frame and the header. The rear attachment is composed of rear attachment plates located on the left and right sides of the vehicle frame. The front attachment, the vehicle frame, the rear attachment, and the header form a parallelogram structure, so that the header maintains a constant angle with the vehicle frame when moving.

[0150] A linkage mechanism connects the operating member and the translation mechanism, so that the header moves upward or downward when the operating member rotates around the first rotating shaft;

[0151] A shift member connected to the vehicle frame and comprising two rows of shift slots, wherein the operating member cannot drive the header to move when engaged with one of the rows of shift slots;

[0152] The linkage mechanism comprises:

[0153] The height-adjusting shaft end plate is connected to the operating member and the first rotating shaft, and the operating member rotates around the first rotating shaft along with the height-adjusting shaft end plate;

[0154] a second rotating shaft connecting the operating member and the height adjustment shaft end plate, wherein the operating member can rotate about the second rotating shaft until it is engaged with any row of shift slots, and when the operating member is rotated to between two rows of shift slots, the operating member can rotate about the first rotating shaft, and the operating member can slide relative to the height adjustment shaft end plate along the axial direction of the second rotating shaft;

[0155] A limiting member connected to the operating member and / or the height adjustment shaft end plate, wherein the limiting member is provided with two curved surfaces;

[0156] An elastic member connects the operating member and the height adjustment shaft end plate. The elastic force of the elastic member causes the operating member to slide along the second rotating shaft relative to the height adjustment shaft end plate. One of the curved surfaces of the limiting member is abutted to generate a deflection force that causes the operating member to deflect to cooperate with one of the gear slots in one column.

[0157] The present invention also discloses another lawn mower, comprising:

[0158] Frame;

[0159] The cutting platform is set on the lower side of the frame and is used for cutting grass;

[0160] The battery pack is connected to the frame and is used to supply power to the header;

[0161] The header lifting device comprises:

[0162] The operating member rotates around a first rotating shaft provided on the vehicle frame;

[0163] The translation mechanism includes a front attachment and a rear attachment hinged at both ends to the vehicle frame and the header. The rear attachment is composed of rear attachment plates located on the left and right sides of the vehicle frame. The front attachment, the vehicle frame, the rear attachment, and the header form a parallelogram structure, so that the header maintains a constant angle with the vehicle frame when moving.

[0164] A linkage mechanism connects the operating member and the translation mechanism, so that the header moves upward or downward when the operating member rotates around the first rotating shaft;

[0165] a shift member connected to the vehicle frame and comprising a shift slot, wherein the operating member cannot drive the header to move when engaged with the shift slot;

[0166] The linkage mechanism comprises:

[0167] The height-adjusting shaft end plate is connected to the operating member and the first rotating shaft, and the operating member rotates around the first rotating shaft along with the height-adjusting shaft end plate;

[0168] A second rotating shaft connects the operating member and the height-adjusting shaft end plate, the operating member can rotate around the second rotating shaft until it is engaged with the shift groove, and the operating member can slide relative to the height-adjusting shaft end plate along the axial direction of the second rotating shaft;

[0169] A limiting member connected to the operating member and / or the height adjustment shaft end plate, wherein the limiting member is provided with a curved surface;

[0170] An elastic member connects the operating member and the limiting member. The elastic force direction of the elastic member is parallel to the second rotating shaft. The elastic force of the elastic member has a tendency to make the operating member slide along the second rotating shaft. The curved surface of the limiting member is abutted to generate a deflection force that causes the operating member to deflect to cooperate with the gear slot.

[0171] The present invention also discloses another lawn mower, comprising:

[0172] Frame;

[0173] The battery pack is connected to the frame and is used to supply power to the header;

[0174] The header lifting device comprises:

[0175] A translation mechanism connects the header and the vehicle frame and is used to limit the header to maintain a constant angle with the vehicle frame when moving;

[0176] Control parts;

[0177] a shift member connected to the vehicle frame and comprising a shift slot, wherein the operating member cannot drive the header to move when engaged with the shift slot;

[0178] A linkage mechanism is configured to rotatably mount the operating member to the vehicle frame, so that the operating member rotates about a first rotation axis to drive the header height to change, and the operating member rotates about a second rotation axis between positions engaged with and disengaged from the gear slot; the linkage mechanism includes:

[0179] A limiting member, the surface of which is configured with a curved surface;

[0180] The elastic member causes the curved surface of the limiting member to abut against and drive the operating member to rotate around the second rotating shaft under the biasing force until the operating member is matched with the shifting groove.

[0181] The present invention also discloses another lawn mower, comprising:

[0182] Frame;

[0183] The battery pack is connected to the frame and is used to supply power to the header;

[0184] The header lifting device comprises:

[0185] A translation mechanism connects the header and the vehicle frame and is used to limit the header to maintain a constant angle with the vehicle frame when moving;

[0186] Control parts;

[0187] A shift member connected to the vehicle frame and comprising two rows of shift slots, wherein the operating member cannot drive the header to move when engaged with one of the rows of shift slots;

[0188] A linkage mechanism is configured to rotatably mount the operating member to the vehicle frame, so that the operating member rotates about a first rotation axis to drive the header height to change, and the operating member rotates about a second rotation axis between positions engaged with and disengaged from the gear slot; the linkage mechanism includes:

[0189] A limiting member, the surface of which is configured with a curved surface;

[0190] The elastic member causes the curved surface of the limiting member to be abutted and drives the operating member to rotate around the second rotating shaft under the biasing force until the operating member is matched with the shifting slot in the nearest row.

[0191] The present invention also discloses another lawn mower, comprising:

[0192] Frame;

[0193] A support platform is provided on the frame and is used to support the user;

[0194] The cutting platform is set on the lower side of the frame and is used for cutting grass;

[0195] The header lifting device comprises:

[0196] The operating member rotates around a first rotating shaft provided on the vehicle frame;

[0197] A translation mechanism connects the header and the vehicle frame and is used to limit the header to maintain a constant angle with the vehicle frame when moving;

[0198] A linkage mechanism connects the operating member and the translation mechanism, so that the header moves upward or downward when the operating member rotates around the first rotating shaft;

[0199] A shift member, comprising a shift slot and connected to the vehicle frame, wherein the operating member cannot drive the header to move when engaged with the shift slot;

[0200] The linkage mechanism comprises:

[0201] The height-adjusting shaft end plate is connected to the operating member and the first rotating shaft, and the operating member rotates around the first rotating shaft along with the height-adjusting shaft end plate;

[0202] a second rotating shaft connecting the operating member and the height adjustment shaft end plate, wherein the operating member is capable of rotating about the second rotating shaft and sliding relative to the height adjustment shaft end plate along the axial direction of the second rotating shaft, wherein the positions of the operating member rotating about the second rotating shaft include an in-gear state position engaged with the gear slot and a disengaged state position disengaged from the gear slot;

[0203] A limiting member connected to the operating member and / or the height adjustment shaft end plate, wherein the limiting member is provided with a curved surface;

[0204] An elastic member connects the operating member and the height adjustment shaft end plate. The elastic force of the elastic member causes the operating member to slide along the second rotating shaft and abut against the limiting member. The curved surface of the limiting member abuts against the operating member and generates a deflection force that deflects the operating member to a blocking state.

[0205] Compared with the prior art, the present invention has the following beneficial effects:

[0206] The present invention arranges an elastic member between the linkage mechanism and the operating member. When the lawn mower is vibrated and the operating member tends to move in the direction of disengaging, the elastic member pulls the operating member and generates a driving force pointing in the direction of the gear slot, thereby avoiding the problem that the operating member automatically disengages from the gear slot when subjected to abnormal road conditions such as bumps, causing the cutting table to fall to the lowest point.

[0207] The present invention provides a limit piece with a protrusion, and the elastic piece makes the operating piece counteract the limit piece, and the pressure of the limit piece on the operating piece has a component force pointing in the direction of the gear slot, so that even when the operating piece is manually released in the middle disengaged state, the elastic piece will cause the operating piece to slide to one side and the cutting table to enter a gear slot, thereby preventing the cutting table from falling directly to the lowest point.

[0208] The limiting member proposed in the present invention includes various forms and can be applied to the situation where shift grooves are provided on both sides of the shift member. Regardless of whether the operating member is located in the shift groove on either side, the cooperation between the elastic member and the limiting member can achieve the technical problem of easy disengagement.

[0209] The present invention proposes a technical solution of setting the attachment point of the cutting platform in the outer space of the frame. Under this solution, the left and right directions of the cutting platform can be made more stable, avoiding the problem of the other side of the cutting platform being easily lifted up when the user steps on the cutting platform, thereby improving the user experience. [Brief Description of the Drawings]

[0210] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings:

[0211] FIG1 is a perspective view of a lawn mower of the present invention;

[0212] FIG2 is a perspective view of the frame and the header lifting device in FIG1;

[0213] FIG3 is a top view of the structure shown in FIG2 ;

[0214] FIG4 is a perspective view of the structure shown in FIG2 from another perspective;

[0215] FIG5 is a schematic diagram of a portion of the structure of the header lifting device shown in FIG2;

[0216] Figures 6 and 7 are schematic diagrams of the structure of the height adjustment shaft end plate and the operating member;

[0217] FIG8 is a schematic structural diagram of a unilateral limit block in the present invention;

[0218] FIG9 is a schematic diagram of an embodiment of the present invention wherein a unilateral limit block is assembled to an end plate of a height adjustment shaft;

[0219] FIG10 is a schematic diagram of the structure of the bilateral limit block in the present invention

[0220] 11 is a schematic diagram of an embodiment of the present invention in which a bilateral limit block is assembled to an end plate of a height adjustment shaft;

[0221] FIG12 is a schematic diagram of an embodiment of the present invention wherein a unilateral limit block is assembled to a manipulation member;

[0222] FIG13 is a schematic diagram of an embodiment of the present invention in which a bilateral limit block is assembled to a manipulation member;

[0223] FIG14 is a schematic diagram of an embodiment of the present invention in which two unilateral limit blocks are used in conjunction with each other;

[0224] Figures 15 and 16 are schematic diagrams of another embodiment of the present invention in which two limit blocks are used in conjunction with each other;

[0225] Figures 17 and 18 are schematic diagrams of another embodiment of the present invention in which two limit blocks are used in conjunction with each other;

[0226] Figures 19 and 20 are schematic diagrams of an embodiment of the present invention in which two limit rings are used in combination;

[0227] Figures 21 and 22 are schematic diagrams of the structure shown in Figure 20 in different states;

[0228] FIG23 is a schematic structural diagram of another embodiment of a stopper;

[0229] Figures 24 and 25 are schematic structural diagrams of another embodiment of a position limiting member;

[0230] FIG26 is a schematic structural diagram of another embodiment of a stopper;

[0231] FIG27 is a schematic diagram of an embodiment of an elastic member using a tension spring;

[0232] FIG28 is a schematic diagram of another embodiment in which a tension spring is used as an elastic member;

[0233] FIG29 is a schematic diagram of another state of the structure shown in FIG28;

[0234] FIG30 is a side view of the structure shown in FIG29;

[0235] FIG31 is a partial schematic diagram of the structure shown in FIG28 with an upper connection point trajectory line;

[0236] Figure 32 is a schematic diagram of the partial structure of the header lifting device with a shift member;

[0237] Figure 33 is a schematic structural diagram of a shift member;

[0238] FIG34 is an enlarged schematic diagram of the height adjustment swing arm portion in FIG2;

[0239] Figure 35 is a schematic diagram of a partial structure of a header lifting device in another embodiment;

[0240] FIG36 is a schematic diagram of a portion of the structure of the header lifting device shown in FIG35;

[0241] FIG37 is a cross-sectional view of a quick-pull locking member in one embodiment;

[0242] FIG38 is a partial enlarged schematic diagram of FIG37;

[0243] FIG39 is a schematic diagram of a shift member in one embodiment;

[0244] FIG40 is a schematic diagram of a shift member portion in another embodiment;

[0245] Figures 41 and 42 are schematic structural diagrams of the operating member portion in some embodiments;

[0246] FIG43 is a schematic diagram of the structure of the shift member in some embodiments.

[0247] The meanings of the reference numerals in the figure are as follows: 1. frame; 2. seat; 3. cutting platform; 4. first rotating shaft; 5. height adjustment arm; 6. pull rod; 7. rear mounting plate; 8. front mounting member; 9. height adjustment shaft end plate; 10. shift member; 101. slideway; 102. shift slot; 103. centering slot; 1031. positioning block; 104. hook; 11. operating member; 12. elastic member; 121. tension spring; 122. compression spring; 13. limit member; 131. limit block; 1311. single-side limit Position block; 1312, double-sided limit block; 1313, concave limit block; 132, limit ring; 1321, convex limit ring; 1322, concave limit ring; 14, clamping plate; 141, groove; 15, spring groove; 16, quick-pull locking member; 161, lock housing; 162, ratchet; 1621, transition surface; 1622, abutment surface; 163, lock core; 164, pawl; 1641, pawl head surface; 1642, pawl side surface; 165, reset member. [Specific implementation method]

[0248] The terms used in this disclosure are for the purpose of describing specific embodiments only and are not intended to limit the disclosure. For example, terms such as "upper," "lower," "front," and "back" that indicate orientation or positional relationships are based solely on the orientation or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the disclosure. They do not indicate or imply that the device referred to must have a specific orientation or be constructed or operated in a specific orientation, and therefore should not be construed as limiting the disclosure.

[0249] Unless otherwise specified, the terms "disposed," "connected," and "connected" in the present invention should be broadly interpreted. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections or indirect connections through an intermediary. "Fixed connection" in the present invention should also be broadly interpreted to mean integral molding, welding, or connection via other fasteners.

[0250] It should be further explained that the term "curved surface" in the present invention should be understood in a broad sense, such as a plane or curved surface arranged obliquely, and should not be limitedly understood as a curved surface with a varying curvature (or slope).

[0251] Please refer to Figure 1, which shows a lawn mower disclosed in the present invention, including a frame 1 and a support platform provided on the frame 1 and used to support a user, a cutting table 3 provided on the lower side of the frame 1, and a cutting table lifting device connecting the frame 1 and the cutting table 3.

[0252] The header lifting device includes: an operating member 11 for the user to hold and pull, a translation mechanism, a linkage mechanism and a shifting member 10.

[0253] The translation mechanism connects the cutting platform 3 and the frame 1, and is used to limit the cutting platform 3 to maintain an unchanged angle with the frame 1 when moving; specifically, referring to Figures 1 to 4, the translation mechanism includes a front mounting member 8 and a rear mounting member hinged at both ends to the frame 1 and the cutting platform 3, and the rear mounting member is composed of rear mounting plates 7 located on the left and right sides of the frame 1. The front mounting member 8, the frame 1, the rear mounting member, and the cutting platform 3 form a parallelogram structure, so that the cutting platform 3 maintains an unchanged angle with the frame 1 when moving.

[0254] The operating member 11 rotates around the first rotating shaft 4 set on the frame 1, and the linkage mechanism connects the operating member 11 and the translation mechanism (in other embodiments, the linkage mechanism can also connect the operating member 11 and the cutting table 3, there is no substantial difference and will not be repeated here). When the operating member 11 is pulled by the user, the cutting table 3 moves upward or downward.

[0255] The shift member 10 includes a shift slot 102 and is connected to the frame 1. When the operating member 11 is engaged with the shift slot 102, it cannot drive the cutting table 3 to move. It is used to limit the cutting table 3 to a specific position to facilitate maintaining a stable cutting height when the lawn mower is running.

[0256] The linkage mechanism also includes a height-adjusting shaft end plate 9 and a second rotating shaft. The height-adjusting shaft end plate 9 is connected to an operating member 11 and the first rotating shaft 4. The operating member 11 rotates around the first rotating shaft 4 synchronously with the height-adjusting shaft end plate 9; the second rotating shaft is connected to the operating member 11 and the height-adjusting shaft end plate 9. The operating member 11 can rotate around the second rotating shaft and slide relative to the height-adjusting shaft end plate 9 along the axial direction of the second rotating shaft. The position of the operating member 11 rotating around the second rotating shaft includes an in-gear state position that cooperates with the gear slot 102 and a disengaged state position that is disengaged from the gear slot 102.

[0257] Furthermore, referring to Figures 6 and 7 , the linkage mechanism further includes a limiter 13 and an elastic member 12 . The limiter 13 is connected to the operating member 11 and / or the height adjustment shaft end plate 9 and is provided with a curved surface. The elastic member 12 connects the operating member 11 and the height adjustment shaft end plate 9 . The elastic force of the elastic member 12 causes the operating member 11 to slide along the second rotating shaft and abut the limiter 13 . The curved surface of the limiter 13 abuts the operating member 11 and generates a deflection force that deflects the operating member 11 into the engaged state. That is, the elastic force of the elastic member 12 when the operating member 11 is in the engaged state is less than the elastic force when the operating member 11 is out of the engaged state.

[0258] The operating member 11 and / or the height-adjusting shaft end plate 9 are provided with threaded holes, and the position-limiting member 13 is provided with mounting holes. The position-limiting member 13 is secured to the operating member 11 and / or the height-adjusting shaft end plate 9 by bolts passing through the mounting holes. To conserve space at the position-limiting member, the threaded holes are internally threaded, and the bolts engage the threaded holes to achieve the connection between the two. Other connection methods may also include bolts and nuts, welding, integral molding, and other methods.

[0259] 4 and 5 , the linkage mechanism in this embodiment includes a pull rod 6; both ends of the pull rod 6 are rotatably connected to the height adjustment shaft end plate 9 and the translation mechanism; when the user pulls the operating member 11 to rotate it around the first rotating shaft 4, the height adjustment shaft end plate 9 rotates with it around the first rotating shaft 4 and pulls the pull rod 6 to move, so that the height of the cutting platform 3 changes.

[0260] Furthermore, referring again to Figures 4 and 5, the linkage mechanism also includes a height-adjusting swing arm 5 connected to the first rotating shaft 4, and the pull rod 6 is rotatably connected to the height-adjusting swing arm 5. The height-adjusting swing arm 5 rotates synchronously when the first rotating shaft 4 rotates, and the height-adjusting swing arm 5 can be set to form a fixed angle with the height-adjusting shaft end plate 9; the operating member 11 in the prior art is set on the lower right side of the support platform (the support platform in the figure is a seat 2 for the user to sit on), and the user needs to bend over to hold and operate the operating member 11, and pulling the operating member 11 requires a large force. Therefore, the solution in the prior art in which the operating member 11 is located on the lower right side consumes a large amount of waist strength of the user, and lumbar muscle injury may occur; this embodiment adds a height-adjusting swing arm 5, and the operating member 11 can be set not on the lower side. At this time, the user does not need to bend over to operate the operating member 11, and the operation method is more humane.

[0261] The force along the first rotating shaft 4 that the operating member 11 overcomes when it is moved from the in-gear state to the out-gear state is 3N~30N. This force is not limited to the magnitude of the driving force applied to the operating member 11, but the magnitude of the component of the driving force along the first rotating shaft 4 is 3N~30N. If the driving force is parallel to the first rotating shaft 4, the above-mentioned component force is equal to the driving force; generally, 10N is preferred. This force range is relatively reasonable and the operation is more comfortable.

[0262] One end of the operating member 11 is bent to form a second rotating shaft. Both ends of the elastic member 12 are connected to the second rotating shaft and the height adjustment shaft end plate 9 to generate an elastic force that drives the operating member 11 to move toward the limiting member 13 .

[0263] The height-adjusting shaft end plate 9 includes a baffle perpendicular to the second rotating shaft. The second rotating shaft passes through the baffle. The elastic member 12 is sleeved on the second rotating shaft, and both ends of the elastic member 12 are connected to the baffle and the second rotating shaft respectively.

[0264] 8 and 9, which are respectively a schematic diagram of the limiting member 13 of the first embodiment and a schematic diagram of the matching state of the limiting member 13 and the operating member 11. The limiting member 13 in this embodiment is fixed to the height adjustment shaft end plate 9; as shown in FIG8, the limiting member 13 uses a unilateral limiting block 1311. The end of the unilateral limiting block 1311 close to the operating member 11 has a curved surface along the rotation direction around the second rotating shaft. There is a height difference in the axial direction of the second rotating shaft. The portion of the curved surface close to the operating member 11 is regarded as a convex portion, and the portion away from the curved surface is regarded as a concave portion. The elastic member 12 in this embodiment is a compression spring 122 mounted on the second rotating shaft. The elastic force direction of the compression spring 122 is parallel to the second rotating shaft. The elastic force applied by the compression spring 122 to the operating member 11 causes it to abut against the unilateral limit block 1311, and the abutting position is located at the curved surface of the unilateral limit block 1311. The abutting force of the curved surface on the operating member 11 has a component force directed to the recessed part, so it can have a tendency to make the operating member 11 move around the second rotating shaft to away from the protrusion until the operating member 11 moves to cooperate with the gear slot 102 and is in the gear state.

[0265] Furthermore, the shifting member 10 includes a slide 101 and shifting grooves 102 are provided on both sides of the slide 101. When the operating member 11 rotates around the first rotating shaft 4, it slides in the slide 101. When the operating member 11 rotates to either side around the second rotating shaft, it enters the shifting groove 102 on the corresponding side. That is, the limiting member 13 can enable the operating member 11 to generate abutting pressure in different directions under different circumstances, so that the operating member 11 has a tendency to deflect in different directions and enter the shifting groove 102 when in different positions.

[0266] Specifically, referring to Figures 10 and 11, which are respectively a schematic diagram of the limiting member 13 of the second embodiment and a schematic diagram of the matching state of the limiting member 13 and the operating member 11, the limiting member 13 of this embodiment is a double-sided limiting block 1312 fixed to the height adjustment shaft end plate 9, and the double-sided limiting block 1312 has two curved surfaces at one end close to the operating member 11 along the rotation direction around the second rotation axis, and the two curved surfaces have a smooth transition; similarly, the portion of the curved surface close to the operating member 11 is regarded as a convex portion, and the portion away from it is regarded as a concave portion; in this embodiment, the two curved surfaces are close to each other The middle part is convex and the two sides are concave; the elastic member 12 in this embodiment is also a compression spring 122, and the elastic force exerted by the compression spring 122 on the operating member 11 makes it resist against the bilateral limit blocks 1312, and the resisting position is located at the curved surface on either side of the bilateral limit blocks 1312. The bilateral limit blocks 1312 exert a lateral component of force on the operating member 11, so it can have a tendency to make the operating member 11 move around the second rotating axis to away from the central protrusion until the operating member 11 moves to cooperate with the gear slot 102 and is in the gear state.

[0267] 8 and 12, which are respectively a schematic diagram of the limiting member 13 of the third embodiment and a schematic diagram of the matching state of the limiting member 13 and the height adjustment shaft end plate 9. The limiting member 13 of this embodiment is a unilateral limiting block 1311 fixed to the operating member 11. The end of the unilateral limiting block 1311 close to the operating member 11 has a curved surface along the rotation direction around the second rotating shaft. The curved surface has a height difference in the axial direction of the second rotating shaft. The portion of the curved surface close to the height adjustment shaft end plate 9 is regarded as a convex portion, and the portion away from the height adjustment shaft end plate is regarded as a concave portion. 9 A protrusion is provided on one side close to the limit block 131; in this embodiment, the elastic member 12 is a compression spring 122, and the elastic force exerted by the compression spring 122 on the operating member 11 causes the unilateral limit block 1311 to abut against the protrusion, and the abutting position is located at the curved surface of the unilateral limit block 1311. The abutting force of the curved surface on the protrusion has a component directed to the recessed part, and the protrusion is subjected to the reaction force and has a tendency to cause the operating member 11 to move around the second rotation axis to move away from the protrusion until the operating member 11 moves to cooperate with the gear slot 102 and is in the gear state.

[0268] 10 and 13, which are respectively a schematic diagram of the limit member 13 of the fourth embodiment and a schematic diagram of the matching state of the limit member 13 and the height adjustment shaft end plate 9. The limit member 13 of this embodiment uses a double-sided limit block 1312 fixed to the height adjustment shaft end plate 9. The double-sided limit block 1312 has two curved surfaces at one end close to the height adjustment shaft end plate 9 along the rotation direction around the second rotation axis, and the two curved surfaces have a smooth transition; similarly, the portion of the curved surface close to the height adjustment shaft end plate 9 is regarded as a convex, and the portion away from it is regarded as a concave; in this embodiment, the middle portion of the two curved surfaces close to each other is a convex, The two sides are recessed; and a protrusion is provided on the side of the height adjustment shaft end plate 9 close to the limit block 131; the elastic member 12 in this embodiment is a compression spring 122, and the elastic force exerted by the compression spring 122 on the operating member 11 causes the bilateral limit blocks 1312 to abut against the protrusion, and the abutting position is located at the curved surface of the bilateral limit blocks 1312, and the abutting force of the curved surface on the protrusion has a component force pointing to the recess, and the protrusion is subjected to the reaction force and has a tendency to make the operating member 11 move around the second rotating axis to and away from the protrusion, until the operating member 11 moves to cooperate with the gear slot 102 and is in the gear state.

[0269] In the first and second embodiments, the limiting member 13 directly abuts against the operating member 11 . However, the operating member 11 is a rod-shaped structure, and its abutment against the limiting member 13 is similar to the abutment between the protrusion and the limiting member 13 in the third and fourth embodiments.

[0270] In the aforementioned embodiment, the limiting member 13 is only provided on the operating member 11 or the height adjustment shaft end plate 9 to produce a counteracting effect. In other embodiments, another limiting member 13 may be provided on the operating member 11. When the curved surfaces of the two limiting members 13 counteract each other, a force is generated to deflect the operating member 11, causing the operating member 11 to move to the blocked state. The details are as follows:

[0271] Referring to Figures 8 and 14, Figure 14 is a schematic diagram of the connection state of the limit member 13 and the height adjustment shaft end plate 9 and the operating member 11 of the fifth embodiment. This embodiment includes two unilateral limit blocks 1311 and is respectively fixed to the height adjustment shaft end plate 9 and the operating member 11, and the two unilateral limit blocks 1311 are abutted at one end with a curved surface; the elastic member 12 in this embodiment is a compression spring 122, and the elastic force applied by the compression spring 122 to the operating member 11 causes the two unilateral limit blocks 1311 to abut against each other at the curved surface of the unilateral limit block 1311. The abutment force of the curved surface of the unilateral limit block 1311 on the other unilateral limit block 1311 has a component force pointing perpendicular to the second rotating axis, so that the operating member 11 is deflected until it cooperates with the gear slot 102 and is in the gear state.

[0272] 15 and 16, FIG15 is a schematic diagram of the structure of the limit member 13 of the sixth embodiment, and FIG16 is a schematic diagram of the connection state of the limit member 13 and the limit member 13 with the height adjustment shaft end plate 9 and the operating member 11 of the sixth embodiment. In this embodiment, the limit block 131 includes two types, one of which is a convex limit block with a protrusion (refer to the bilateral limit block 1312 in the accompanying drawings), and the other is a concave limit block 1313 with a depression. The protrusions and depressions of the two limit blocks 131 can cooperate with each other, and the protrusion of the convex limit block includes curved surfaces on both sides and a vertex in the middle, and the depression of the concave limit block 1313 includes curved surfaces on both sides and a concave point in the middle. The curved surface of the convex limit block and The concave surfaces of the concave limit block 1313 abut against each other to generate a component force that deflects the operating member 11, driving the operating member 11 to deflect to cooperate with the gear slot 102 and be in a gear state. This embodiment can generate a component force for deflection on both sides. When the curved surface of the convex limit block abuts against the corresponding side curved surface of the concave limit block 1313, a force is generated to deflect the operating member 11 in one direction; when the other curved surface of the convex limit block abuts against the corresponding side curved surface of the concave limit block 1313, a force is generated to deflect the operating member 11 in the other direction, thereby achieving that when the operating member 11 is closer to the gear slot 102 on one side, the abutment force generated by the limit block 131 drives the operating member 11 into the gear slot 102 on the corresponding side.

[0273] Referring to Figures 17 and 18, Figure 17 is a schematic diagram of the connection state of the limit member 13 of the seventh embodiment and the limit member 13 and the height adjustment shaft end plate 9 and the operating member 11. In this embodiment, the limit block 131 is only one type, and the limit block 131 is a convex limit block with a convex shape. The convex shape of the convex limit block includes curved surfaces on both sides and a vertex in the middle. The curved surfaces of the two convex limit blocks offset each other to generate a component force that deflects the operating member 11, driving the operating member 11 to deflect to cooperate with the gear slot 102 and be in the gear state. This embodiment can generate component forces for deflection on both sides. When the curved surface of one convex limit block abuts against the corresponding side curved surface of another convex limit block, a force is generated to deflect the operating member 11 in one direction; when the other curved surface of the convex limit block abuts against the corresponding side curved surface of the convex limit block, a force is generated to deflect the operating member 11 in the other direction, thereby achieving that when the operating member 11 is closer to the gear slot 102 on one side, the abutting force generated by the limit block 131 tends to force the operating member 11 into the gear slot 102 on the corresponding side.

[0274] In addition, the limiting member 13 in each of the above embodiments only functions as an abutment point at the same time. In other embodiments, the limiting member 13 may be an annular structure, with protrusions and / or depressions symmetrically arranged on the surface of the limiting member 13 to produce an abutment effect, as follows:

[0275] 19 to 22 , schematic diagrams of the limiting member 13 and the mating state of the limiting member 13 and the operating member 11 according to the eighth embodiment are shown. The limiting member 13 in this embodiment is an annular limiting ring 132 with two symmetrical protrusions. In the figures, the two protrusions on a single limiting ring 132 are symmetrical. When the protrusions of the two limiting rings 132 abut against each other, the operating member 11 is in the disengaged state. At this point, the elastic force of the elastic member 12 creates a lateral abutting force component between the two limiting rings 132, thereby causing the operating member 11 to shift laterally to the engaged state. Specifically, referring to FIG. 20 , in this state, the top ends of the protrusions of the two limiting members 13 abut against each other. Although there is no lateral force component, this state is clearly unstable. Even slight lateral force applied by the user or slight vibration of the vehicle can cause the operating member 11 to shift to a certain extent, entering the state shown in FIG. 21 or FIG. 22 , whereupon the operating member 11 deflects into the corresponding shift slot 102. It can be further expanded that more than two protrusions are symmetrically arranged on a single limiting ring 132, which can also achieve the same technical effect. The specific solutions are similar and will not be described in detail here.

[0276] Referring to Figure 23, which is another embodiment of the present invention, the figure shows annular and mutually cooperating limit rings 132, one of which is located on the height adjustment shaft end plate 9, and the other limit ring 132 is located on the operating member 11, one of which is a convex limit ring 1321 with a protrusion, and the other is a concave limit ring 1322 with a recess. When the protrusions and recesses of the two limit rings 132 cooperate, the operating member 11 is in a blocking state, otherwise it is in a disengaged state.

[0277] Referring to Figures 24 and 25, there is another embodiment of the present invention, which shows a limiting ring 132 which is also annular and cooperates with each other. The two limiting rings 132 are respectively located on the height adjustment shaft end plate 9 and the operating member 11, and one of the limiting rings 132 is provided with a protrusion, and the other limiting ring 132 is provided with a recess. However, it is different from the embodiment shown in Figure 23. The convex limiting ring of this embodiment is provided with a protrusion on the upper and lower sides, and the concave limiting ring is provided with two recesses on the upper and lower sides. This embodiment is applicable to the technical solution of providing shift grooves 102 on both sides of the aforementioned shifting member 10. When the protrusion of the convex limiting ring cooperates with any one of the recesses, the operating member 11 is in the gear position, and when the protrusion of the convex limiting ring abuts against the area between the two recesses of the concave limiting ring, the operating member 11 is in the disengaged state.

[0278] Referring to Figure 26, another embodiment of the present invention is shown in the figure as a ring-shaped and mutually cooperating limit ring 132. The two limit rings 132 are respectively located on the height adjustment shaft end plate 9 and the operating member 11, and one of the limit rings 132 is provided with a protrusion, and the other limit ring 132 is provided with a recess. However, different from the embodiments shown in Figures 23, 24, and 25, the limit rings 132 of this embodiment have more protrusions and recesses, and the number of single-sided recesses is one more than the number of protrusions at the corresponding positions. At this time, the two limit rings 132 have two mutually cooperating stable states, corresponding to the technical solution of setting two left and right rows of gear grooves 102 for the gear member 10; when the two limit rings 132 are in a state between the two stable states, the operating member 11 is in a disengaged state.

[0279] It is additionally noted that in the embodiments shown in Figures 8, 9, 12, 14, 15, 16, and 23 above, the extreme deflection position of the operating member 11 remains offset against the curved surface of the limiting member 13, and only one of the two extreme positions of the operating member 11 rotating around the second rotation axis is in a stable state, and this stable state corresponds to the operating member 11 being in the blocking state. In the embodiments shown in the aforementioned Figures 11, 13, 17, 18, 19, 20, 21, 22, 24, 25 and 26, the two extreme positions of the operating member 11 rotating around the second rotating axis are both in a stable state. At this time, it is applicable to the case where the operating member 11 is in the gear state at the two extreme positions; however, it should be noted that the technical solution of the limit member 13 being able to achieve two stable states is not completely unapplicable to the single-sided gear slot 102 solution. It is only necessary to limit the maximum rotation position of the operating member 11 through an external structure, so that it cannot move from Figure 21 to the state shown in Figure 22. The specific external structure only needs to set a blocking structure on the height adjustment shaft end plate 9 or the gear member 10 or the frame 1 to produce a blocking effect on the operating member 11, which will not be elaborated here.

[0280] Furthermore, a specific solution for ensuring that the operating member 11 is in the engaged state when it is positioned on either side is to provide a shift groove 102 on both sides of the shift member 10. This means that when the operating member 11 is rotated about the second rotation axis to either side, the position is engaged, and when the operating member 11 is positioned in the middle, the position is disengaged. Alternatively, both limiting members 13 may be provided with a protrusion and a depression. This specific solution is not significantly different from the above and will not be further described. Similarly, this should not be construed as exceeding the scope of protection of this application.

[0281] The aforementioned compression spring 122 is installed in such a way that one end is fixedly connected to the second rotating shaft, and the other end abuts the baffle of the height-adjusting shaft end plate 9. Its installation method and installation position only need to enable the second rotating shaft to slide axially along the second rotating shaft relative to the height-adjusting shaft end plate; that is, the compression spring 122 is not sleeved on the second rotating shaft, but is arranged on one side thereof, or even inclined, which should fall within the protection scope required by this patent.

[0282] Different from the previous embodiment, referring to Figures 27 to 31, the elastic member 12 is a tension spring 121 whose two ends are respectively connected to the operating member 11 and the height adjustment shaft end plate 9. The elastic member 12 generates an oblique pulling force on the operating member 11, causing the operating member 11 to move to one side. The elastic force of the elastic member 12 when the operating member 11 is in the gear state is less than the elastic force of the operating member 11 in the disengaged state.

[0283] In one embodiment of the present invention, the shifting member 10 is only provided with the shifting groove 102 on one side, and the lower part of the tension spring 121 is fixed to generate an oblique pulling force on the operating member 11. Referring to Figure 27, it should be noted that the lower hanging point of the tension spring 121 (the end of the tension spring 121 close to the second rotating shaft) is fixed above the second rotating shaft, and from a top-down perspective, the lower hanging point is closer to the in-gear state position of the operating member 11, which can ensure that when the operating member 11 is in the disengaged state, it can receive the oblique pulling force of the tension spring 121, thereby causing the operating member 11 to move toward the in-gear state position.

[0284] Referring to Figures 28 to 31, as mentioned above, in order to enable the operating member 11 to move to both sides to reach the gear state, gear slots 102 are provided on both sides of the gear member 10, that is, when the operating member 11 is rotated to either side around the second rotation axis, it is in the gear state; a spring slot 15 perpendicular to the second rotation axis is provided on the height adjustment shaft end plate 9, and the elastic member 12 is a tension spring 121 with one end sliding in the spring slot 15; when the operating member 11 enters the gear slot 102 on either side, the end of the tension spring 121 slides to the corresponding side of the spring slot 15; when the tension spring 121 slides to the middle of the spring slot 15, the operating member 11 is in the gear state. The member 11 is collinear with the height adjustment shaft end plate 9, and the tension spring 121 has the largest stretching amount; when the operating member 11 is deflected to either side, the tension spring 121 begins to contract and the end of the tension spring 121 located in the spring slot 15 slides along the slot to the same side until it slides to the end of the slot. At this time, the operating member 11 also completely enters the gear slot 102 on the corresponding side under the action of the tension spring 121; on the contrary, when the user holds the operating member 11 to disengage it from the gear slot 102, the movement state of the tension spring 121 is opposite to the above and will not be repeated; when the user releases the operating member 11, the operating member 11 will automatically enter the gear slot 102 on one side. 31 is an example, which is a partially enlarged schematic diagram of FIG28. The connection point between the tension spring 121 and the operating member 11 is the upper connection point, and the connection point between the tension spring 121 and the height adjustment shaft end plate 9 is the lower connection point. The spring slot 15 is located on the upper side of the second rotating shaft, that is, the lower connection point is located on the upper side of the second rotating shaft. The arc a in the figure is the trajectory line of the upper connection point during the entire rotation stroke of the operating member 11. The trajectory line is an arc with the second rotating shaft as the center of the circle, and the upper wall of the spring slot 15 is the trajectory line of the lower connection point. Analysis shows that only when the lower connection point is directly above the second rotating shaft, the upper connection point, the lower connection point, and the second rotating shaft are coplanar. At this time, the stretching amount of the tension spring 121 is the largest, thereby ensuring that when the operating member 11 deflects to one side, the lower connection belt of the tension spring 121 can slide to the edge of the same side of the spring slot 15, and the deformation of the tension spring 121 is the smallest.

[0285] In one embodiment of the present invention, the header lifting device further includes a buffer member connected to the frame 1 and the linkage assembly to reduce the pulling force applied by the user to pull the operating member 11 to raise the header 3. The buffer member comprises a tension spring with its ends connected to the frame 1 and the height adjustment shaft end plate 9, or a torsion spring with its ends connected to the frame 1 and the first rotating shaft 4. The tension spring or torsion spring reduces the burden on the user when pulling the operating member 11, thereby improving user comfort.

[0286] As previously mentioned, the shift member 10 of the present invention is provided with shift slots 102 on both sides. Furthermore, a slideway 101 is provided between the shift slots 102 on both sides. The operating member 11 extends through the slideway 101 and can move along the slideway 101 into any shift slot 102. At least one shift slot 102 is not at the same height as any shift slot 102 on the other side of the slideway 101. Since the size of a single shift member 10 and the total travel of the operating member 11 are limited, providing shift slots 102 on both sides significantly increases the number of shift slots 102, thereby increasing the total number of gears of the lawn mower, that is, providing users with a wider range of mowing heights to meet the needs of more users.

[0287] With reference to Figures 23 and 24, the movement direction of the operating member 11 when the cutting table 3 rises is defined as the upper direction, and the side wall of the gear slot 102 in the upper direction is inclined and extends from the gear slot 102 to the direction of the slide 101, pointing to the upper direction. When the user pulls the operating member 11 in the upper direction, the operating member 11 is abutted against the side wall of the gear slot 102. The direction of the side wall enables the side wall to have the effect of guiding the operating member 11 laterally to the slide 101, that is, the user only needs to pull the operating member 11 in the upper direction, and the operating member 11 can be easily moved out of the gear slot 102 without deliberately pulling the operating member 11 laterally, thereby simplifying the user operation.

[0288] The direction of movement of the operating member 11 when the cutting platform 3 is lowered is defined as the downward direction. The side wall of the gear slot 102 in the downward direction extending from the gear slot 102 toward the slide 101 is not tilted toward the downward direction. The gravity of the cutting platform 3 exerts a pulling force on the operating member 11 that does not cause it to move toward the slide 101. The side wall of the gear slot 102 in the downward direction extending from the gear slot 102 toward the slide 101 is tilted toward the direction opposite to the downward direction, that is, the side wall of the gear slot 102 in the downward direction extending from the gear slot 102 toward the slide 101 is tilted toward the upward direction. When the vehicle bumps and causes the cutting platform 3 to jump, even if the operating member 11 jumps and is slightly dislocated in the gear groove 102, the side wall direction of the gear groove 102 will cause the operating member 11 to return to the side of the gear groove 102 away from the slide 101 under the action of the gravity of the cutting platform 3, ensuring that the operating member 11 will not leave the original gear groove 102, that is, keeping the cutting platform 3 highly stable.

[0289] Furthermore, even if the user manually releases the operating member 11 at the slide 101, the operating member 11 will enter the gear groove 102 on one side in a very short time with the action of the elastic member 12, thereby preventing the cutting table 3 from falling directly to the lowest point.

[0290] The height of the cutting platform 3 from the ground when the operating member 11 is not fully engaged with the gear slot 102 is greater than the height of the cutting platform 3 from the ground when the operating member 11 is fully engaged with the same gear slot 102, that is, when the operating member 11 is not fully engaged with the gear slot 102, the weight of the cutting platform 3 will cause the operating member 11 to gradually slide until it is fully engaged with the gear slot 102; similarly, when the vehicle bumps and causes the cutting platform 3 to bounce, even if the operating member 11 bounces and is slightly dislocated in the gear slot 102 to an incompletely engaged state, the gravity of the cutting platform 3 will cause the operating member 11 to gradually slide until it is fully engaged with the gear slot 102.

[0291] The operating member 11 is provided with a clamping plate 14 that can cooperate with the shifting slot 102 on one side. The width of the shifting slot 102 is greater than the thickness of the clamping plate 14 and smaller than the dimension of the operating member 11 along the width direction of the shifting slot 102. When the operating member 11 cooperates with the gear slot 102, only the card plate 14 on the operating member 11 extends into the gear slot 102, so the size of a single gear slot 102 along the slide 101 can be reduced, that is, within the same size range, a larger number of gear slots 102 can be set, so that the total number of gears of the lawn mower is greater, and the height of the cutting blade off the ground after the cutting table 3 is raised or lowered is the mowing height, so the number of mowing heights for users to choose is greater, which is suitable for the needs of more users. In the prior art, the gear slots 102 of the lawn mower are mostly set to 5 to 8; the gear slots 102 in this embodiment can have a larger setting range, so it can be set to more than 10. In this embodiment, the total lifting stroke of the cutting table 3 (the height difference between the highest point and the lowest point) is 3 inches. When 11 gear slots 102 are set, the height difference of the cutting table 3 between every two adjacent gear slots 102 is 0.3 inches. In another embodiment, the number of the shift slots 102 is 13, and the height difference between the header 3 of each two adjacent shift slots 102 is 0.25 in. In another embodiment, the number of the shift slots 102 is 16, and the height difference between the header 3 of each two adjacent shift slots 102 is 0.20 in.

[0292] In this embodiment, the product of the total lifting stroke (in) of the cutting platform 3, the number of the gear slots 102, and the curb weight (kg) of the lawn mower is greater than 1×10 3 Less than or equal to 6×10 4 In another embodiment, the product of the total lifting stroke (in) of the cutting platform 3, the number of the gear slots 102, and the curb weight (Kg) of the lawn mower is greater than 6×10 3 Less than or equal to 2.4×10 4(in·Kg). A relatively reasonable numerical range allows a lawn mower of a given size to have more appropriate mowing height settings, meeting the mowing height requirements of a wider range of users. A lawn mower with a larger curb weight occupies more space, allowing for more complex components to achieve more complex technical effects. It should also have a wider range of gears and mowing heights to meet a wider range of operating conditions.

[0293] The translation mechanism of the lawn mower of this embodiment includes a front attachment 88 and a rear attachment, both ends of which are hinged to the frame 1 and the cutting table 3. The rear attachment is composed of rear attachment plates 7 located on the left and right sides of the frame 1. The front attachment 88, the frame 1, the rear attachment, and the cutting table 3 form a parallelogram structure, so that the angle between the cutting table 3 and the frame 1 remains unchanged when the cutting table 3 moves; a linkage mechanism connects the operating member 11 and the rear attachment, and the operating member 11 rotates around the first rotating shaft 4 to drive the cutting table 3 to move upward or downward; and the rear attachment is located outside the left and right edges of the frame 1.

[0294] Referring to Figures 3 and 25, Figure 25 is an enlarged schematic diagram of the pull rod 6 and the height adjustment swing arm 5. The distance between the rear mounting plate 7 and the outer edge of the frame 1 in the left and right directions is in the range of 0 to 50 mm. The main structure of the frame 1 includes two longitudinally extending beams. The rear mounting plate 7 is arranged outside the left and right edges of the frame 1, that is, outside the side walls of the vehicle that are away from each other. Referring to Figure 25, H1 is less than or equal to 50 mm.

[0295] In the prior art, the attachment points of the cutting table 3 are all located on the inner side of the frame 1 in the left and right directions. Compared with the prior art, attaching it on the outer side can make the distance between the two attachment points larger and more stable in the laterally direction; because the cutting table 3 is wider than the frame 1, the user may accidentally step on the cutting table 3 as a step to get on the vehicle when stepping on the lawn mower from the ground; the narrower attachment point in the prior art may cause the other side of the cutting table 3 to tilt up when stepped on by the user, because the difference in length of the two lever arms with the attachment point as the rotation point is small, and the moment of the outer side (lever arm multiplied by equivalent weight) may be greater than that of the inner side when a heavy user steps on it; the wider attachment point in this embodiment increases the difference in the lever arms on both sides, and it is difficult for a heavy user to make the moment of the outer side greater than that of the inner side when stepping on it, that is, it is difficult for the other side to tilt up.

[0296] Specifically, the ratio of the distance between the two rear mounting plates 7 and the cutting width of the mower is 0.3-0.8. In other embodiments, the ratio of the distance between the two rear mounting plates 7 and the cutting width of the mower can be set to 0.38-0.66. The width of the frame 1 is about 500-600 mm, the cutting width standard of the cutting table 3 is 42 inches or 54 inches, and the rear mounting part is set 0-50 mm outside the frame 1 to obtain the above ratio. It should be noted that at least one of the mowing motors of a common mower is partially located outside the mounting point, resulting in an increase in the rotational torque outside the mounting point. The mounting point in this embodiment is moved outward relative to the prior art (see Figure 3), which not only shortens the outer lever arm, but also allows more parts of one of the mowing motors to be located within the mounting point, thereby greatly reducing the rotational torque outside the mounting point, making the cutting table 3 more stable, and greatly reducing the problem of the other side of the cutting table 3 tilting due to user stepping on it.

[0297] In other embodiments, only one side of the rear mounting plate 7 may be set in an area outside the frame 1, and the other rear mounting plate 7 may be set in an area inside the frame 1. In this case, only one side can effectively increase the rotational torque outside the mounting point, that is, when the user stands on this side of the cutting platform 3, the other side of the cutting platform 3 is prevented from tilting up.

[0298] An embodiment of the present specification further discloses a cutting platform lifting device, which is connected to a frame and a cutting platform of a lawn mower and is used to adjust the height of the cutting platform.

[0299] The header lifting device includes an operating member 11, a translation mechanism, and a linkage mechanism. The translation mechanism connects the header 3 to the vehicle frame 1 and is used to maintain a constant angle between the header 3 and the vehicle frame 1 during movement. This ensures that the header 3 maintains a substantially constant angle with the ground during the lifting process. The linkage mechanism connects the operating member 11 and the translation mechanism, and movement of the operating member 11 drives the header 3 upward or downward.

[0300] The linkage mechanism includes a first rotating shaft 4 and a quick-pull locking member 16. As previously described, the operating member 11 rotates about the first rotating shaft 4 disposed on the frame 1. The linkage mechanism connects the operating member 11 with the translation mechanism. When the operating member 11 is pulled by the user, it rotates the first rotating shaft 4 and causes the cutting table 3 to move upward or downward. In this embodiment, the rotation direction of the first rotating shaft 4 is defined as: the first rotating shaft 4 is turned in the forward direction when the cutting table 3 moves upward, and the first rotating shaft 4 is turned in the reverse direction when the cutting table 3 moves downward.

[0301] The quick-pull locking member 16 is connected to the frame 1 and the first rotating shaft 4. When the rotation speed of the first rotating shaft 4 is greater than the first rotation speed, the first rotating shaft 4 is restricted from continuing to rotate. Under normal use of the lawn mower, the cutting table 3 will only be slowly raised and lowered; however, if a component failure or other conditions occur, the cutting table 3 may rise or fall rapidly. In the worst case, the cutting table lifting device may be subjected to excessive impact force and reduce its service life. In the worst case, it may even cause injury to the user. Therefore, this embodiment discloses a quick-pull locking member 16 that can limit the rotation speed of the first rotating shaft 4 on the first rotating shaft 4. When the height of the cutting table 3 changes rapidly, the rotation of the first rotating shaft 4 is restricted, so as to avoid the first rotating shaft 4 from continuing to rotate and the height of the cutting table 3 from continuing to change, resulting in more serious consequences.

[0302] In some optional embodiments, the first rotational speed is 0.1 rpm, that is, when the rotational speed of the first rotating shaft 4 is greater than 0.1 rpm, the height of the header 3 is restricted from further changing. In other optional embodiments, the first rotational speed is 0.2 rpm, 0.3 rpm, or 1 rpm.

[0303] It should be additionally noted that the connection between the quick-pull lock 16 and the frame 1 and the first rotating shaft 4 is not limited to a direct connection between the quick-pull lock 16 and the frame 1 and the first rotating shaft 4 , and they may be indirectly connected through other components.

[0304] In one embodiment of the present specification, the cutting platform lifting device also includes a buffer member connected to the frame 1 and the linkage assembly, which is used to reduce the pulling force required to pull the operating member 11 to lift the cutting platform 3. Especially in the usage scenario where the user needs to manually pull the cutting platform 3 to lift or lower, the buffer member can effectively reduce the force required for the user to pull the operating member 11.

[0305] In some optional embodiments, the buffer member includes a tension spring whose two ends are respectively connected to the frame 1 and the height adjustment shaft end plate 9, or a torsion spring whose two ends are respectively connected to the frame 1 and the first rotating shaft 4; the tension spring or torsion spring here can reduce the burden of the user pulling the operating member 11, thereby improving the user's comfort.

[0306] For example, in the field of lawn mowers, the height adjustment range of the cutting deck 3 is typically 3 to 4.5 inches, with the lowest point of the height adjustment range being approximately 1 to 1.5 inches above the ground. Considering the need for margin in the mechanical structure of the cutting deck 3, 7 inches is used as the maximum height of the cutting deck 3 above the ground. If the aforementioned buffer is partially disconnected from the cutting deck 3, the cutting deck 3 will fall rapidly. When the cutting deck 3 falls from its maximum height above the ground, it is primarily affected by gravity, and its descent is inevitably affected by a certain amount of resistance. Calculations show that its descent takes slightly less than 0.19 seconds, and its instantaneous velocity upon landing is approximately 1.9 m / s. During the raising and lowering of the cutting deck in the field of lawn mowers, the total rotational travel of the joystick 11 is approximately 40° around the first rotating shaft 4, which translates to approximately 0.11 rotations of the first rotating shaft 4, corresponding to an average rotational speed of approximately 0.58 r / s (revolutions per second) for the first rotating shaft 4.

[0307] Referring to Figure 35 , the rotational speed of the first rotating shaft 4 is related not only to the vertical movement speed of the header 3 but also to the length and angle of the height adjustment arm 5. The length of the height adjustment arm 5 is set to 10 cm. During the header's elevation, the height adjustment arm 5 rotates within a range of ±20° relative to the horizontal. Calculations show that the rotational speed at the moment of landing is approximately 3.2 revolutions per second (r / s).

[0308] As mentioned above, the quick-pull locking mechanism should lock the first rotating shaft 4 before its rotational speed reaches 3.2 rpm. However, if the quick-pull locking mechanism only activates after reaching this speed, the desired effect will not be achieved. Therefore, the quick-pull locking mechanism should activate at the initial stage of rapid rotation of the first rotating shaft 4, i.e., at the initial stage of the header 3's fall. Therefore, the quick-pull locking mechanism should be set to operate at a speed lower than the average rotational speed of the first rotating shaft, for example, 0.1 rpm, 0.2 rpm, or 0.3 rpm.

[0309] At the same time, the quick-pull locking mechanism should not interfere with normal user operation; that is, it should not be too sensitive to trigger when the user adjusts the header height. Normal user adjustment typically takes 1 to 2 seconds, during which the first shaft 4 rotates by 5°, a speed significantly less than the aforementioned 0.1 rpm. Therefore, in this embodiment, the first speed is set to 0.1 rpm. That is, when the speed of the first shaft 4 exceeds 0.1 rpm, the quick-pull locking member 16 is triggered, locking the first shaft 4. This prevents the user from being injured by rapid movement of the operating member or other components of the header lifting mechanism.

[0310] In some of the more specific embodiments, the quick-pull locking member 16 includes a lock housing 161, a lock core 163, a lock tongue, and a reset member 165, wherein the lock housing 161 is configured on the vehicle frame 1, the lock core 163 is configured on the first rotating shaft 4, the lock tongue is movably connected to one of the lock housing 161 and the lock core 163, and the reset member 165 is connected to the lock tongue.

[0311] In some of the optional embodiments, the reset member 165 limits the rotation speed of the first rotating shaft 4 to be less than the first rotation speed, and the lock tongue does not abut the other of the lock housing 161 and the lock core 163; the lock tongue abuts the other of the lock housing 161 and the lock core 163 when the rotation speed of the first rotating shaft 4 is greater than the first rotation speed, so that the first rotating shaft 4 cannot rotate.

[0312] As described above, the quick-pull lock 16 can lock the first rotating shaft 4 when the rotational speed of the first rotating shaft 4 exceeds a predetermined first rotational speed. In some optional embodiments, the quick-pull lock 16 only locks the first rotating shaft 4 when the first rotating shaft 4 rotates in the forward direction at a speed greater than the first rotational speed, causing the lock tongue to abut the other of the lock housing 161 and the lock core 163, thereby preventing the first rotating shaft 4 from rotating. When the first rotating shaft 4 rotates in the reverse direction at a speed greater than the first rotational speed, the lock tongue does not abut the other of the lock housing 161 and the lock core 163, allowing the first rotating shaft 4 to continue rotating.

[0313] In some more specific embodiments, the lock housing 161 is provided with an abutment portion, and the lock tongue moves and abuts against the abutment portion when the speed of the first rotating shaft 4 is greater than a first rotation speed, thereby achieving a technical effect of locking the first rotating shaft 4 .

[0314] In some more specific embodiments, the abutting force exerted on the lock tongue when it abuts against the other of the lock housing 161 and the lock core 163 causes the lock tongue to tend to approach the other of the lock housing 161 and the lock core 163. In other words, once the lock tongue begins to abut, the abutting force generated will tighten the abutment between the two, preventing the two from separating due to overall shaking, thereby making the locking effect on the first rotating shaft 4 more reliable.

[0315] In a more specific embodiment, referring to FIG35 , a quick-pull lock 16 is shown configured on the first rotating shaft 4, and referring to FIG36 , an enlarged schematic diagram of the linkage mechanism is shown. Referring to FIG37 , a cross-sectional schematic diagram of the quick-pull lock 16 is shown. The lock housing 161 is fixed to the vehicle frame 1, and the lock cylinder 163 is fixed to the first rotating shaft 4. The lock housing 161 is partially annular in structure, and its annular inner wall is provided with a ratchet 162 protruding from the surface; the lock tongue in this embodiment is configured as a pawl 164, one end of which is rotatably connected to the lock cylinder 163, and the pawl 164 is provided with the above-mentioned reset member 165 to prevent the first rotating shaft 4 from contacting the above-mentioned ratchet 162 when it is stationary.

[0316] Continuing with FIG. 37 , when the first rotating shaft 4 rotates, the pawl 164 is subjected to centrifugal force, tending to move outward away from the first rotating shaft 4. However, in this embodiment, a reset member 165 is provided to restrain the pawl 164. When the rotational speed of the first rotating shaft 4 is less than the first rotational speed, the centrifugal force acting on the pawl 164 is unable to effectively overcome the force exerted by the reset member 165 on the pawl 164, thereby preventing the pawl 164 from significantly moving relative to the lock cylinder 163. Conversely, when the rotational speed of the first rotating shaft 4 is greater than the first rotational speed, the centrifugal force acting on the pawl 164 is greater, effectively overcoming the force exerted by the reset member 165 on the pawl 164, causing the pawl 164 to rotate and contact the lock housing 161.

[0317] Continuing with reference to Figures 37 and 38, Figure 38 is a partially enlarged schematic diagram of Figure 37. The lock housing 161 shown in the figure includes a ratchet tooth 162, which has an abutment surface 1622 for abutting and restraining a pawl 164. The pawl 164 has a pawl head surface 1641 for abutting against the abutment surface 1622. As described above, when the rotational speed of the first rotating shaft 4 is greater than the first rotational speed and is rotating counterclockwise, the pawl 164 is subjected to centrifugal force and rotates relative to the lock cylinder 163 until the pawl head surface 1641 of the pawl 164 abuts against the abutment surface 1622 of the ratchet tooth 162, thereby preventing the first rotating shaft 4 from rotating further.

[0318] Referring again to FIG. 38 , as shown, the ratchet tooth 162 includes a generally smooth transition surface 1621, and the pawl 164 includes a generally smooth pawl side surface 1642. As described above, when the first rotating shaft 4 rotates clockwise at a speed greater than the first speed, the pawl 164 rotates relative to the lock cylinder 163 due to centrifugal force. When the pawl 164 contacts the ratchet tooth 162 due to the centrifugal force, the pawl side surface 1642 of the pawl 164 contacts the transition surface 1621 of the ratchet tooth 162. This contact does not significantly restrict the rotation of the first rotating shaft 4, meaning that the quick-pull lock 16 does not restrict the rotation of the first rotating shaft 4 at this time.

[0319] It should be noted that in some embodiments, in the absence of external force, after the pawl 164 engages with the ratchet teeth 162 to lock the first rotating shaft 4, it will remain locked. To release this locked state, the user simply pulls the operating lever 11 to reverse the first rotating shaft 4 until the pawl 164 disengages from the ratchet teeth 162. The pawl 164 then returns to its initial position under the action of the reset member 165, effectively releasing the locking effect on the first rotating shaft 4. It should also be noted that if the user directly releases the operating lever 11 at this point, the first rotating shaft 4 may still rapidly rotate again, causing it to be locked again by the quick-pull locking member 16.

[0320] In some optional embodiments, the quick-release lock 16 is disposed on the first shaft 4. When the header 3 is raised, the first shaft 4 rotates clockwise; when the header 3 is lowered, the first shaft 4 rotates counterclockwise. In this case, if a component in the header lifting mechanism malfunctions, potentially causing the header 3 to rapidly fall, the first shaft 4 will rapidly rotate counterclockwise. The quick-release lock 16 will brake the first shaft 4, preventing the header 3 from falling further and potentially injuring the user.

[0321] In some optional embodiments, the quick-release lock 16 is disposed on the first rotating shaft 4. When the header 3 is lowered, the first rotating shaft 4 rotates clockwise; conversely, when the header 3 is raised, the first rotating shaft 4 rotates counterclockwise. In this case, if a component malfunctions in the header lifting device, the first rotating shaft 4 may rotate rapidly counterclockwise. For example, if the connection between the first rotating shaft 4 and the header 3 is disconnected, the first rotating shaft 4 may rotate rapidly counterclockwise under the action of the buffer. The quick-release lock 16 will brake the first rotating shaft 4, preventing the operating member 11 from rapidly bouncing upward and causing injury to the user.

[0322] In some optional embodiments, the header lifting device is equipped with at least two quick-pull locks 16, one of which restricts further rotation of the first rotating shaft 4 when the first rotating shaft 4 rotates forward at a speed greater than a first speed, and the other quick-pull lock 16 restricts further rotation of the first rotating shaft 4 when the first rotating shaft 4 rotates reversely at a speed greater than the first speed. In this embodiment, at least one quick-pull lock 16 brakes the first rotating shaft 4 as long as the speed of the first rotating shaft 4 exceeds the first speed, regardless of whether the first rotating shaft 4 rotates forward or reverse, to prevent injury to the user.

[0323] In some optional embodiments, two sets of the ratchet teeth 162 and pawls 164 are configured in a single quick-pull locking member 16. The two sets of ratchet teeth 162 and pawls 164 are arranged in mirror symmetry. That is, one set of ratchet teeth 162 and pawls 164 can limit the forward rapid rotation of the first rotating shaft 4, while the other set of ratchet teeth 162 and pawls 164 can limit the reverse rapid rotation of the first rotating shaft 4. This effectively achieves that a single quick-pull locking member 16 brakes the first rotating shaft 4 when the rotation speed of the first rotating shaft 4 in either the forward or reverse direction exceeds the first rotation speed, thereby preventing damage to the user.

[0324] In some optional embodiments, the reset member 165 is configured as at least one of a compression spring, a tension spring, and a torsion spring. Referring again to Figures 37 and 38 , the reset member 165 shown in the figures is configured as a tension spring with its two ends connected to the pawl 164 and the lock cylinder 163, respectively.

[0325] In another alternative embodiment, the middle portion of pawl 164 is rotatably connected to lock core 163, and return member 165 is configured to connect one end of pawl 164 and a compression spring of lock core 163. When first shaft 4 rotates, the other end of pawl 164 is subjected to a greater centrifugal force than the end connected to the compression spring. Therefore, when the first shaft 4 rotates at a high speed, the centrifugal force on pawl 164 compresses the compression spring until pawl 164 contacts ratchet teeth 162.

[0326] In another embodiment, the reset member 165 is configured as a magnetic member capable of generating magnetic repulsion or magnetic attraction on the lock tongue. When the first shaft 4 rotates at a high speed, the centrifugal force of the pawl 164 will overcome the magnetic force until it contacts the ratchet tooth 162 .

[0327] In summary, the above embodiments disclose a cutting platform lifting device and a quick-pull lock 16 used in the cutting platform lifting device. This device restricts the rotation of the first rotating shaft 4 when the lifting mechanism of the cutting platform 3 moves abnormally, causing it to rotate too fast. In particular, when the cutting platform 3 falls rapidly or the joystick rebounds upward rapidly, the first rotating shaft 4 is locked to prevent injury to the user. For example, when the user removes the cutting platform 3 from the vehicle frame 1, the cutting platform lifting device loses the pulling force exerted by the weight of the cutting platform 3, causing the cutting platform lifting device to move rapidly under the action of the buffer. The quick-pull lock 16 can lock the first rotating shaft 4, preventing the cutting platform lifting device from continuing to operate rapidly and causing greater damage. In particular, for components such as the joystick 11 that are prone to direct contact with the user, their rapid movement may cause injury to the user. Therefore, the quick-pull lock 16 can prevent injury to the user by locking the first rotating shaft 4.

[0328] One embodiment of this specification also discloses a lawn mower, comprising the frame 1, a cutting table 3, a battery pack, a cutting table lifting device, and the like, wherein the battery pack is detachably mounted on the frame 1. The cutting table lifting device comprises a first rotating shaft 4 and a quick-pull locking member 16. The first rotating shaft 4 rotates forward when the cutting table 3 moves upward. The quick-pull locking member 16 connects the frame 1 and the first rotating shaft 4. When the speed of the first rotating shaft 4 exceeds a first speed, the first speed is limited to 0.5 rpm.

[0329] In one embodiment of the present specification, a cutting platform lifting device is further disclosed. The cutting platform lifting device is connected to the frame 1 and the cutting platform 3 of the lawn mower and is used to adjust the height of the cutting platform 3 .

[0330] The cutting platform lifting device includes an operating member 11, a translation mechanism, a linkage mechanism, a shifting member 10, and a centering portion. Specifically, the translation mechanism connects the cutting platform 3 to the vehicle frame 1, and is used to limit the angle between the cutting platform 3 and the vehicle frame 1 during movement. The linkage mechanism connects the operating member 11 and the translation mechanism. When the operating member 11 is pulled by the user, it drives the cutting platform 3 upward or downward. The shifting member 10 is connected to the vehicle frame 1 and includes a slide 101 through which the operating member 11 passes, and shifting slots 102 located on both sides of the slide 101. When the operating member 11 is engaged with the shifting slots 102, it cannot drive the cutting platform 3 to move. The operating member 11 has a first position when engaged with the centering portion. In this first position, the operating member 11 is spaced equidistant from the shifting slots 102 on both sides.

[0331] As described above, in some optional embodiments, shift slots 102 are provided on both sides of the shift member 10, that is, when the operating member 11 is engaged with the shift slot 102 on either side, the height of the cutting platform 3 is a fixed value.

[0332] In some optional embodiments, the linkage mechanism includes a second rotating shaft and an elastic member 12, and when the operating member 11 moves about the second rotating shaft, it moves toward one of the side shifting slots 102. Furthermore, when the operating member 11 rotates forward about the second rotating shaft, the operating member 11 moves toward the first side shifting slot 102; when the operating member 11 rotates backward about the second rotating shaft, the operating member 11 moves toward the second side shifting slot 102.

[0333] As described above, the elastic member 12 is connected to the operating member 11. When the operating member 11 is closer to one of the shifting slots 102, the elastic member 12 drives the operating member 11 toward the shifting slot 102 on the side closer to the operating member 11. When the operating member 11 is located in the middle of the shifting slots 102 on both sides, the elastic member 12 does not exert any force on the operating member 11 toward either of the shifting slots 102.

[0334] In some optional embodiments, the header 3 moves upward or downward when the operating member 11 moves along the slideway 101 of the shifting member; when the operating member 11 engages with the centering portion, the header 3 is at the highest point of vertical movement. Referring to Figure 39 , the centering portion in this embodiment is configured as a centering groove 103 located at the top of the slideway 101. This groove 103 is capable of engaging with the operating member 11, and when the operating member 11 remains engaged with the centering groove, it cannot move toward either side of the shifting groove 102.

[0335] In some optional embodiments, the operating member 11 is at least partially cylindrical, and the centering portion is configured as a centering groove 103 formed in the shifting member 10 and capable of cooperating with the cylindrical structure of the operating member 11. The cylindrical structure of the operating member 11 makes it easier to disengage from the centering groove 103.

[0336] In some optional embodiments, at least a portion of the operating member 11 in the first position is aligned with the projection of the second rotating shaft on the ground. Referring to Figure 39 , the operating member 11 is not shown in the first position, but the centering groove 103 shown in the figure is aligned with the projection of the second rotating shaft on the ground. Therefore, at least a portion of the operating member 11 in the first position is necessarily aligned with the projection of the second rotating shaft on the ground.

[0337] In some optional embodiments, referring to FIG40 , the centering portion is configured as a positioning block detachably connected to the shift member 10. When engaged with the shift member 10, the positioning block cannot move in the direction of movement of the operating member 11. The positioning block is provided with a centering groove 103 that engages with the operating member 11. When the operating member 11 engages with the centering groove 103 of the positioning block, it is in the first position. In other words, the centering portion in this embodiment is not fixed to the shift plate.

[0338] In some optional embodiments, as shown in FIG40 , the header 3 moves downward when the operating member 11 moves in the first direction, and the operating member 11 cannot move in the first direction when engaged with the centering portion. This means that the user does not need to manually maintain the position of the operating member 11.

[0339] As described above, in some embodiments of this specification, the header lifting device includes a centering portion for confining the operating member 11 to the center of the two side shifting slots 102. During assembly of the header lifting device, by confining the operating member 11 to the centering portion, the position of the stopper 13 can be installed and verified. This prevents the elastic member 12 from properly biasing the shifting slots 102 when the operating member 11 is slightly offset from the center of the two side shifting slots 102 due to assembly offset of the stopper 13. The user can also verify the proper function of the header lifting device by pulling the operating member 11 to the first position to feel the lateral thrust generated by the elastic member.

[0340] In one embodiment of this specification, a lawn mower is disclosed. The lawn mower includes the frame 1, cutting platform 3, battery pack, and cutting platform lifting device described above, wherein the battery pack is detachably mounted on the frame 1. The cutting platform lifting device includes a shifting member 10 and a centering portion. The shifting member 10 is connected to the frame 1 and includes a slide 101 through which an operating member 11 passes, and shifting slots 102 located on either side of the slide 101. The operating member 11 has a first position when engaged with the centering portion. In the first position, the operating member 11 is equidistant from the shifting slots 102 on either side.

[0341] An embodiment of the present specification further discloses a cutting platform lifting device, which is connected to a frame 1 and a cutting platform 3 of a lawn mower and is used to adjust the height of the cutting platform 3 .

[0342] The cutting platform lifting device includes an operating member 11, a translation mechanism, a linkage mechanism, a shifting member 10, and a retaining member. Specifically, the translation mechanism connects the cutting platform 3 to the vehicle frame 1, and is used to limit the angle between the cutting platform 3 and the vehicle frame 1 during movement. The linkage mechanism connects the operating member 11 and the translation mechanism. When the operating member 11 is pulled by the user, it drives the cutting platform 3 upward or downward. The shifting member 10 is connected to the vehicle frame 1 and includes a slide 101 through which the operating member 11 passes, and shifting slots 102 located on both sides of the slide 101. When the operating member 11 is engaged with the shifting slots 102, it cannot drive the cutting platform 3 to move. The retaining member is connected to the vehicle frame 1. When the operating member 11 is engaged with the retaining member, the cutting platform 3 cannot move upward.

[0343] The header 3 is relatively heavy. To reduce the force required to pull the operating member 11 to raise the header 3, a buffer is typically provided. However, if the operating member 11 is not restrained after the header lifting device is disengaged from the header 3, the buffer could cause the operating member 11 to move rapidly, potentially injuring the user. Therefore, in this embodiment, a retaining member is provided to restrain the operating member 11.

[0344] In some optional embodiments, the control member 11 engages with a retaining member when the cutting deck 3 is at least approximately at its lowest point. Disconnecting the cutting deck 3 from the mower is primarily done during maintenance or disassembly, and in these situations, the cutting deck 3 is typically lowered to its lowest point. However, after disconnecting the cutting deck 3 from the mower, the control member 11 reaches its maximum travel. Without a retaining member to limit the control member 11 at this point, the control member 11 could pose a significant risk to the user. Furthermore, limiting the control member 11 to this lowest point also facilitates the user's ease of reinstallation of the cutting deck 3 to the mower.

[0345] In some optional embodiments, the latch is located on the shift member 10, which is relatively close to the outside of the mower and visible to the user. This allows the user to determine the height of the cutting deck 3 by observing the engagement between the operating member 11 and the shift member 10. Similarly, the user can also determine the engagement between the operating lever and the latch by observing the position of the operating lever, thereby determining whether the operating lever will rapidly rebound and cause injury to the user after the cutting deck 3 is separated from the mower body. In other words, when the user needs to detach the cutting deck 3 from the mower body, they should actively control the operating lever to engage the latch on the shift member 10.

[0346] In some other optional embodiments, the locking member may also be directly configured on the vehicle frame 1 or other components fixedly connected to the vehicle frame 1 .

[0347] In some optional embodiments, referring to FIG43 , a schematic structural diagram of the stopper 10 is shown. The stopper is configured as a hook 104 that limits the upward movement of the operating member 11 when engaged with the operating member 11. The operating member 11 is restrained by engaging with the hook 104.

[0348] In some optional embodiments, the operating member 11 is provided with a groove 141 for cooperating with the hook 104 .

[0349] In some optional embodiments, referring to Figures 41 and 42 , there are shown schematic diagrams of the structure of the operating member 11. The operating member 11 is provided with a clamping plate 14 for engaging with the shifting groove 102. In some more specific embodiments, the groove 141 is formed in the clamping plate 14.

[0350] As described above, in some optional embodiments, the linkage mechanism includes an elastic member 12 connected to the operating member 11, which is used to generate a force on the operating member 11 to move it toward the shift slot 102, thereby preventing the operating member 11 from disengaging from the shift slot 102 and causing a shift disengagement. Furthermore, the retaining member is configured to at least overcome the elastic force of the elastic member 12 on the operating member 11 before it can release its engagement with the operating member 11. This reduces the possibility of the operating member 11 being easily disengaged from the retaining member due to vibration, thereby improving safety for the user when disassembling the header 3.

[0351] That is, the header lifting device is equipped with a stopper that can limit the control part, so that the header cannot move up, and avoid the header and header lifting device from accidentally falling off, which may cause the control part to rebound rapidly, thereby preventing the user from being injured by the control part. In particular, it prevents the user from being injured by the control part when removing the header from the frame because the control part is not restricted by the stopper and rebounds rapidly under the action of the buffer part.

[0352] In some more specific embodiments, the force exerted by the elastic member 12 on the operating member 11 is primarily directed toward the shifting slot 102, that is, the direction of the force is from the slideway 101 of the shifting member 10 toward the shifting slot 102. Using Figure 39 as an example, the force exerted by the elastic member 12 on the operating member 11 is primarily directed leftward or rightward from the slideway 101 of the shifting member 10 toward the shifting slot 102 on either side. The operating member 11 must overcome this force to release its engagement with the retaining member, meaning that when engaged with the retaining member, the operating member 11 is at least proximate to the shifting slot 102 on either side, rather than being positioned where the elastic member 12 does not exert a lateral force on the operating member 11.

[0353] As described above, in some optional embodiments, the header lifting device further includes a buffer member connected to the vehicle frame 1 and the linkage assembly, which is used to reduce the pulling force applied by the user to pull the operating member 11 to raise the header 3. The retaining member is configured to at least overcome part of the elastic force of the buffer member on the operating member 11 before releasing the retaining member from the operating member 11. This reduces the possibility of the operating member 11 being easily disengaged from the retaining member due to vibration, thereby improving safety when the user disassembles the header 3.

[0354] In a more specific embodiment, referring to FIG43 , a portion of the hook 104 extends downward. During the process of disengaging the operating member 11 from the hook 104, the operating member 11 must move along the portion of the hook 104 that extends downward. However, this movement must overcome the force exerted by the buffer member on the operating member 11. Therefore, fitting the operating member 11 with the retaining member is safer and more reliable.

[0355] In another optional embodiment, a component capable of at least partially independent movement may be provided on the operating member 11 or the shifting member 10. This component may be manipulated by the user to cooperate with the operating member 11 or the shifting member 10 to limit the position of the operating member 11. For example, a latch, a socket, etc. may be provided on the operating member 11 or the shifting member 10.

[0356] In one embodiment of the present specification, a lawn mower is disclosed. The lawn mower includes the frame 1, a cutting platform 3, a battery pack, a cutting platform lifting device, and the like as described above. The battery pack is detachably mounted on the frame 1. The cutting platform lifting device includes a shifting member 10 and a retaining member. The shifting member 10 is connected to the frame 1 and includes a slide 101 and a shifting slot 102 through which an operating member 11 passes. When the operating member 11 engages with the shifting slot 102, the cutting platform 3 cannot move downward. The retaining member is connected to the frame 1 and cannot move upward when the operating member 11 engages with the retaining member.

[0357] It is particularly noted that the support platform in some embodiments of this specification is a seat 2, but the cutting platform lifting device in the above embodiments is also applicable to other lawn mowers that do not have a seat 2, such as a stand-on lawn mower, etc. Furthermore, the solution that does not include a support platform in this specification is a push lawn mower or a self-propelled lawn mower; that is, it should be understood that the lawn mowers to be protected by this specification include but are not limited to riding lawn mowers and stand-on lawn mowers.

[0358] In other embodiments of the present specification, the cutting blades at the cutting deck 3 are driven by a mowing motor, and the lawn mower should include a battery pack for supplying power to the cutting deck 3 .

[0359] This specification is not limited to the specific embodiments described above. Persons skilled in the art will readily appreciate that numerous alternatives to the lawn mower and cutting table lifting device described herein exist without departing from the principles and scope of this specification. The scope of protection of this specification shall be determined by the claims.

Claims

1. A cutting table lifting device, connecting the frame and cutting table of a lawn mower, characterized in that: include: The operating member rotates around a first rotating shaft provided on the vehicle frame; A translation mechanism connects the header and the vehicle frame and is used to limit the header to maintain a constant angle with the vehicle frame when moving; A linkage mechanism connects the operating member and the translation mechanism, so that the header moves upward or downward when the operating member rotates around the first rotating shaft; A shift member, comprising a shift slot and connected to the vehicle frame, wherein the operating member cannot drive the header to move when engaged with the shift slot; The linkage mechanism comprises: The height-adjusting shaft end plate is connected to the operating member and the first rotating shaft, and the operating member rotates around the first rotating shaft along with the height-adjusting shaft end plate; a second rotating shaft connecting the operating member and the height adjustment shaft end plate, wherein the operating member is capable of rotating about the second rotating shaft and sliding relative to the height adjustment shaft end plate along the axial direction of the second rotating shaft, wherein the positions of the operating member rotating about the second rotating shaft include an in-gear state position engaged with the gear slot and a disengaged state position disengaged from the gear slot; A limiting member connected to the operating member and / or the height adjustment shaft end plate, wherein the limiting member is provided with a curved surface; An elastic member connects the operating member and the height adjustment shaft end plate. The elastic force of the elastic member causes the operating member to slide along the second rotating shaft and abut against the limiting member. The curved surface of the limiting member abuts against the operating member and generates a deflection force that deflects the operating member to a blocking state.

2. The header lifting device according to claim 1, characterized in that: The linkage mechanism comprises: A pull rod connecting the height adjustment shaft end plate and the translation mechanism; When the operating member rotates around the first rotating shaft, the height-adjusting shaft end plate rotates with it and pulls the pull rod to move, so that the height of the cutting platform changes.

3. The header lifting device according to claim 2, characterized in that: The linkage mechanism further includes a height-adjusting swing arm connected to the first rotating shaft, and the pull rod is rotatably connected to the height-adjusting swing arm.

4. The header lifting device according to claim 1, characterized in that: The force along the first rotation axis overcome by the operating member when it is moved from the in-gear state to the out-gear state is 3N to 30N.

5. The header lifting device according to claim 1, characterized in that: The limiting member is an annular structure.

6. The header lifting device according to claim 1, characterized in that: The height adjustment shaft end plate includes a baffle perpendicular to the second rotating shaft. One end of the operating member is bent to form the second rotating shaft and passes through the baffle. The elastic member is sleeved on the second rotating shaft and the two ends of the elastic member are respectively connected to the baffle and the second rotating shaft.

7. The header lifting device according to claim 6, characterized in that: The shifting member includes a slideway and shifting grooves are provided on both sides of the slideway. When the operating member rotates around the first rotating shaft, the operating member slides in the slideway. When the operating member rotates around the second rotating shaft to either side, the operating member enters the shifting groove on the corresponding side.

8. The header lifting device according to claim 6 or 7, characterized in that: The limiting member is fixedly arranged on the height adjustment shaft end plate, and the operating member has a tendency to deflect and move to cooperate with the shifting groove when it abuts against the curved surface of the limiting member under the action of the elastic member.

9. The header lifting device according to claim 8, characterized in that: The height adjustment shaft end plate is provided with a threaded hole, the position limiting member is provided with a mounting hole, and the position limiting member is matched with the threaded hole of the height adjustment shaft end plate via a bolt passing through the mounting hole.

10. The header lifting device according to claim 6 or 7, characterized in that: The operating member and the height-adjusting shaft end plate are both provided with limiting members, and the curved surfaces of the two limiting members abut against each other to generate a deflection force that causes the operating member to deflect to cooperate with the shift groove.

11. The header lifting device according to claim 10, characterized in that: A threaded hole is provided on the height adjustment shaft end plate, a mounting plate with a threaded hole is fixedly provided on the operating member, a mounting hole is provided on the limiting member, and the limiting member is matched with the threaded holes of the height adjustment shaft end plate and the operating member through a bolt passing through the mounting hole.

12. The header lifting device according to claim 10, characterized in that: The limiting member is provided with a protrusion with a smooth transition surface, and the surfaces of the protrusions of the two limiting members abut against each other.

13. The header lifting device according to claim 10, characterized in that: One of the limiting parts is provided with a protrusion, and the other limiting part is provided with a recess, and the surfaces of the two limiting parts provided with protrusions or recesses abut against each other; when the operating part is in the blocking state, the protrusion of one of the limiting parts abuts against the recess of the other limiting part.

14. A cutting table lifting device, connected to the frame and cutting table of a lawn mower, characterized in that: include: The operating member rotates around a first rotating shaft provided on the vehicle frame; A translation mechanism connects the header and the vehicle frame and is used to limit the header to maintain a constant angle with the vehicle frame when moving; A linkage mechanism connects the operating member and the translation mechanism, so that the header moves upward or downward when the operating member rotates around the first rotating shaft; A shift member, comprising a shift slot and connected to the vehicle frame, wherein the operating member cannot drive the header to move when engaged with the shift slot; The linkage mechanism comprises: The height-adjusting shaft end plate is connected to the operating member and the first rotating shaft, and the operating member rotates around the first rotating shaft along with the height-adjusting shaft end plate; A second rotating shaft connects the operating member and the height-adjusting shaft end plate, the operating member can rotate around the second rotating shaft until it is engaged with the shift groove, and the operating member can slide relative to the height-adjusting shaft end plate along the axial direction of the second rotating shaft; A limiting member connected to the operating member and / or the height adjustment shaft end plate, wherein the limiting member is provided with a curved surface; An elastic member connects the operating member and the height adjustment shaft end plate. The elastic force of the elastic member causes the operating member to slide along the second rotating shaft and abut against the limiting member. The abutting force of the operating member under the action of the curved surface of the limiting member causes the operating member to have a tendency to enter the gear slot.

15. A cutting table lifting device, connected to the frame and cutting table of a lawn mower, characterized in that: include: The operating member rotates around a first rotating shaft provided on the vehicle frame; A translation mechanism connects the header and the vehicle frame and is used to limit the header to maintain a constant angle with the vehicle frame when moving; A linkage mechanism connects the operating member and the translation mechanism, so that the header moves upward or downward when the operating member rotates around the first rotating shaft; A shift member connected to the vehicle frame and comprising two rows of shift slots, wherein the operating member cannot drive the header to move when engaged with one of the rows of shift slots; The linkage mechanism comprises: The height-adjusting shaft end plate is connected to the operating member and the first rotating shaft, and the operating member rotates around the first rotating shaft along with the height-adjusting shaft end plate; a second rotating shaft connecting the operating member and the height adjustment shaft end plate, wherein the operating member can rotate about the second rotating shaft until it is engaged with any row of shift slots, and when the operating member is rotated to between two rows of shift slots, the operating member can rotate about the first rotating shaft, and the operating member can slide relative to the height adjustment shaft end plate along the axial direction of the second rotating shaft; A limiting member connected to the operating member and / or the height adjustment shaft end plate, wherein the limiting member is provided with two curved surfaces; An elastic member connects the operating member and the height adjustment shaft end plate. The elastic force of the elastic member causes the operating member to slide along the second rotating shaft relative to the height adjustment shaft end plate. One of the curved surfaces of the limiting member is abutted to generate a deflection force that causes the operating member to deflect to cooperate with one of the gear slots in one column.

16. A cutting table lifting device, connected to the frame and cutting table of a lawn mower, characterized in that: include: The operating member rotates around a first rotating shaft provided on the vehicle frame; A translation mechanism connects the header and the vehicle frame and is used to limit the header to maintain a constant angle with the vehicle frame when moving; A linkage mechanism connects the operating member and the translation mechanism, so that the header moves upward or downward when the operating member rotates around the first rotating shaft; a shift member connected to the vehicle frame and comprising a shift slot, wherein the operating member cannot drive the header to move when engaged with the shift slot; The linkage mechanism comprises: The height-adjusting shaft end plate is connected to the operating member and the first rotating shaft, and the operating member rotates around the first rotating shaft along with the height-adjusting shaft end plate; A second rotating shaft connects the operating member and the height-adjusting shaft end plate, the operating member can rotate around the second rotating shaft until it is engaged with the shift groove, and the operating member can slide relative to the height-adjusting shaft end plate along the axial direction of the second rotating shaft; Two limiting members are respectively fixed to the operating member and the height adjustment shaft end plate, and the limiting members are provided with a curved surface; The elastic member, the connecting operating member and the height-adjusting shaft end plate are used to make the two limiting members abut against each other, and the curved surface of the limiting member is abutted to generate a deflection force that causes the operating member to deflect to match the shift groove.

17. A cutting table lifting device, connected to the frame and cutting table of a lawn mower, characterized in that: include: The operating member rotates around a first rotating shaft provided on the vehicle frame; A translation mechanism connects the header and the vehicle frame and is used to limit the header to maintain a constant angle with the vehicle frame when moving; A linkage mechanism connects the operating member and the translation mechanism, so that the header moves upward or downward when the operating member rotates around the first rotating shaft; a shift member connected to the vehicle frame and comprising a shift slot, wherein the operating member cannot drive the header to move when engaged with the shift slot; The linkage mechanism comprises: The height-adjusting shaft end plate is connected to the operating member and the first rotating shaft, and the operating member rotates around the first rotating shaft along with the height-adjusting shaft end plate; A second rotating shaft connects the operating member and the height-adjusting shaft end plate, the operating member can rotate around the second rotating shaft until it is engaged with the shift groove, and the operating member can slide relative to the height-adjusting shaft end plate along the axial direction of the second rotating shaft; A limiting member is fixed to the height adjustment shaft end plate, and the limiting member is provided with a curved surface; The elastic member connects the operating member and the height-adjusting shaft end plate to enable the operating member to abut against the curved surface of the limiting member. The curved surface of the limiting member is abutted to generate a deflection force that causes the operating member to deflect to cooperate with the shift groove.

18. A cutting table lifting device, connected to the frame and cutting table of a lawn mower, characterized in that: include: A translation mechanism connects the header and the vehicle frame and is used to limit the header to maintain a constant angle with the vehicle frame when moving; Control parts; a shift member connected to the vehicle frame and comprising a shift slot, wherein the operating member cannot drive the header to move when engaged with the shift slot; A linkage mechanism is configured to rotatably mount an operating member to the vehicle frame, so that the operating member rotates about a first rotation axis to drive the header height to change, and the operating member rotates about a second axis between positions engaged with and disengaged from the gear slot; the linkage mechanism includes: A limiting member, the surface of which is configured with a curved surface; The elastic member causes the curved surface of the limiting member to abut against and drive the operating member to rotate around the second axis under the biasing force until the operating member is matched with the shifting groove.

19. A cutting table lifting device, connected to the frame and cutting table of a lawn mower, characterized in that: include: A translation mechanism connects the header and the vehicle frame and is used to limit the header to maintain a constant angle with the vehicle frame when moving; Control parts; A shift member connected to the vehicle frame and comprising two rows of shift slots, wherein the operating member cannot drive the header to move when engaged with one of the rows of shift slots; A linkage mechanism is configured to rotatably mount an operating member to the vehicle frame, so that the operating member rotates about a first rotation axis to drive the header height to change, and the operating member rotates about a second axis between positions engaged with and disengaged from the gear slot; the linkage mechanism includes: A limiting member, the surface of which is configured with a curved surface; The elastic member causes the curved surface of the limiting member to be abutted and drives the operating member to rotate around the second axis under the biasing force until the operating member is matched with the shift slot in the nearest row.

20. A lawn mower, characterized in that: include: Frame; The cutting platform is set on the lower side of the frame and is used for cutting grass; The battery pack is connected to the frame and is used to supply power to the header; The header lifting device comprises: The operating member rotates around a first rotating shaft provided on the vehicle frame; A translation mechanism connects the header and the vehicle frame and is used to limit the header to maintain a constant angle with the vehicle frame when moving; A linkage mechanism connects the operating member and the translation mechanism, so that the header moves upward or downward when the operating member rotates around the first rotating shaft; A shift member, comprising a shift slot and connected to the vehicle frame, wherein the operating member cannot drive the header to move when engaged with the shift slot; The linkage mechanism comprises: The height-adjusting shaft end plate is connected to the operating member and the first rotating shaft, and the operating member rotates around the first rotating shaft along with the height-adjusting shaft end plate; a second rotating shaft connecting the operating member and the height adjustment shaft end plate, wherein the operating member is capable of rotating about the second rotating shaft and sliding relative to the height adjustment shaft end plate along the axial direction of the second rotating shaft, wherein the positions of the operating member rotating about the second rotating shaft include an in-gear state position engaged with the gear slot and a disengaged state position disengaged from the gear slot; A limiting member connected to the operating member and / or the height adjustment shaft end plate, wherein the limiting member is provided with a curved surface; An elastic member connects the operating member and the height adjustment shaft end plate. The elastic force of the elastic member causes the operating member to slide along the second rotating shaft and abut against the limiting member. The curved surface of the limiting member abuts against the operating member and generates a deflection force that deflects the operating member to a blocking state.

21. The lawn mower according to claim 20, wherein The translation mechanism includes a front attachment and a rear attachment, both ends of which are hinged to the frame and the cutting table. The rear attachment is composed of rear attachment plates located on the left and right sides of the frame. The front attachment, frame, rear attachment, and cutting table form a parallelogram structure, so that the angle between the cutting table and the frame remains unchanged when the cutting table moves; the rear attachment is located in the area outside the left and right edges of the frame.

22. A lawn mower, characterized in that: include: Frame; The cutting platform is set on the lower side of the frame and is used for cutting grass; The battery pack is connected to the frame and is used to supply power to the header; The header lifting device comprises: The operating member rotates around a first rotating shaft provided on the vehicle frame; The translation mechanism includes a front attachment and a rear attachment hinged at both ends to the vehicle frame and the header. The rear attachment is composed of rear attachment plates located on the left and right sides of the vehicle frame. The front attachment, the vehicle frame, the rear attachment, and the header form a parallelogram structure, so that the header maintains a constant angle with the vehicle frame when moving. A linkage mechanism connects the operating member and the translation mechanism, so that the header moves upward or downward when the operating member rotates around the first rotating shaft; A shift member, comprising a shift slot and connected to the vehicle frame, wherein the operating member cannot drive the header to move when engaged with the shift slot; The linkage mechanism comprises: The height-adjusting shaft end plate is connected to the operating member and the first rotating shaft, and the operating member rotates around the first rotating shaft along with the height-adjusting shaft end plate; A second rotating shaft connects the operating member and the height-adjusting shaft end plate, the operating member can rotate around the second rotating shaft until it is engaged with the shift groove, and the operating member can slide relative to the height-adjusting shaft end plate along the axial direction of the second rotating shaft; A limiting member connected to the operating member and / or the height adjustment shaft end plate, wherein the limiting member is provided with a curved surface; An elastic member connects the operating member and the height adjustment shaft end plate. The elastic force of the elastic member causes the operating member to slide along the second rotating shaft and abut against the limiting member. The abutting force of the operating member under the action of the curved surface of the limiting member causes the operating member to have a tendency to enter the gear slot.

23. A lawn mower, characterized in that: include: Frame; The cutting platform is set on the lower side of the frame and is used for cutting grass; The battery pack is connected to the frame and is used to supply power to the header; The header lifting device comprises: The operating member rotates around a first rotating shaft provided on the vehicle frame; The translation mechanism includes a front attachment and a rear attachment hinged at both ends to the vehicle frame and the header. The rear attachment is composed of rear attachment plates located on the left and right sides of the vehicle frame. The front attachment, the vehicle frame, the rear attachment, and the header form a parallelogram structure, so that the header maintains a constant angle with the vehicle frame when moving. A linkage mechanism connects the operating member and the translation mechanism, so that the header moves upward or downward when the operating member rotates around the first rotating shaft; A shift member connected to the vehicle frame and comprising two rows of shift slots, wherein the operating member cannot drive the header to move when engaged with one of the rows of shift slots; The linkage mechanism comprises: The height-adjusting shaft end plate is connected to the operating member and the first rotating shaft, and the operating member rotates around the first rotating shaft along with the height-adjusting shaft end plate; a second rotating shaft connecting the operating member and the height adjustment shaft end plate, wherein the operating member can rotate about the second rotating shaft until it is engaged with any row of shift slots, and when the operating member is rotated to between two rows of shift slots, the operating member can rotate about the first rotating shaft, and the operating member can slide relative to the height adjustment shaft end plate along the axial direction of the second rotating shaft; A limiting member connected to the operating member and / or the height adjustment shaft end plate, wherein the limiting member is provided with two curved surfaces; An elastic member connects the operating member and the height adjustment shaft end plate. The elastic force of the elastic member causes the operating member to slide along the second rotating shaft relative to the height adjustment shaft end plate. One of the curved surfaces of the limiting member is abutted to generate a deflection force that causes the operating member to deflect to cooperate with one of the gear slots in one column.

24. A lawn mower, characterized in that: include: Frame; The battery pack is connected to the frame and is used to supply power to the header; The header lifting device comprises: A translation mechanism connects the header and the vehicle frame and is used to limit the header to maintain a constant angle with the vehicle frame when moving; Control parts; a shift member connected to the vehicle frame and comprising a shift slot, wherein the operating member cannot drive the header to move when engaged with the shift slot; A linkage mechanism is configured to rotatably mount the operating member to the vehicle frame, so that the operating member rotates about a first rotation axis to drive the header height to change, and the operating member rotates about a second rotation axis between positions engaged with and disengaged from the gear slot; the linkage mechanism includes: A limiting member, the surface of which is configured with a curved surface; The elastic member causes the curved surface of the limiting member to abut against and drive the operating member to rotate around the second rotating shaft under the biasing force until the operating member is matched with the shifting groove.

25. A lawn mower, characterized in that: include: Frame; The battery pack is connected to the frame and is used to supply power to the header; The header lifting device comprises: A translation mechanism connects the header and the vehicle frame and is used to limit the header to maintain a constant angle with the vehicle frame when moving; Control parts; A shift member connected to the vehicle frame and comprising two rows of shift slots, wherein the operating member cannot drive the header to move when engaged with one of the rows of shift slots; A linkage mechanism is configured to rotatably mount the operating member to the vehicle frame, so that the operating member rotates about a first rotation axis to drive the header height to change, and the operating member rotates about a second rotation axis between positions engaged with and disengaged from the gear slot; the linkage mechanism includes: A limiting member, the surface of which is configured with a curved surface; The elastic member causes the curved surface of the limiting member to be abutted and drives the operating member to rotate around the second rotating shaft under the biasing force until the operating member is matched with the shifting slot in the nearest row.

26. A lawn mower, characterized in that: include: Frame; A support platform is provided on the frame and is used to support the user; The cutting platform is set on the lower side of the frame and is used for cutting grass; The header lifting device comprises: The operating member rotates around a first rotating shaft provided on the vehicle frame; A translation mechanism connects the header and the vehicle frame and is used to limit the header to maintain a constant angle with the vehicle frame when moving; A linkage mechanism connects the operating member and the translation mechanism, so that the header moves upward or downward when the operating member rotates around the first rotating shaft; A shift member, comprising a shift slot and connected to the vehicle frame, wherein the operating member cannot drive the header to move when engaged with the shift slot; The linkage mechanism comprises: The height-adjusting shaft end plate is connected to the operating member and the first rotating shaft, and the operating member rotates around the first rotating shaft along with the height-adjusting shaft end plate; a second rotating shaft connecting the operating member and the height adjustment shaft end plate, wherein the operating member is capable of rotating about the second rotating shaft and sliding relative to the height adjustment shaft end plate along the axial direction of the second rotating shaft, wherein the positions of the operating member rotating about the second rotating shaft include an in-gear state position engaged with the gear slot and a disengaged state position disengaged from the gear slot; A limiting member connected to the operating member and / or the height adjustment shaft end plate, wherein the limiting member is provided with a curved surface; An elastic member connects the operating member and the height adjustment shaft end plate. The elastic force of the elastic member causes the operating member to slide along the second rotating shaft and abut against the limiting member. The curved surface of the limiting member abuts against the operating member and generates a deflection force that deflects the operating member to a blocking state.

27. A header lifting device, connecting a frame and a header, wherein the frame comprises two longitudinally extending beams, characterized in that: include: Hookup parts, connecting the frame and the header; An operating member connected to the attachment member, wherein the controlled movement of the operating member drives the attachment member to move and causes the height of the header to change; At least one of the connection points between the connection member and the vehicle frame is located at the outer side areas of the two vehicle beams.

28. The header lifting device according to claim 27, characterized in that: The hanging parts include a front hanging part and two rear hanging parts, wherein the distance between one of the rear hanging parts and the outer edge of the vehicle beam in the left and right directions of the vehicle frame is in the range of 0 to 50 mm.

29. The header lifting device according to claim 28, characterized in that: The two ends of the front and rear attachments are rotatably connected to the vehicle frame and the cutting platform. The front attachment, the vehicle frame, the rear attachment and the cutting platform form a parallelogram structure, so that the cutting platform maintains a constant angle with the vehicle frame when moving.

30. The header lifting device according to claim 28, characterized in that: The ratio of the distance between the two rear attachment parts to the cutting width of the lawn mower is 0.3 to 0.

8.

31. The header lifting device according to claim 30, characterized in that: The ratio of the distance between the two rear attachment parts to the cutting width of the lawn mower is 0.38 to 0.

66.

32. A lawn mower, characterized in that: include: A vehicle frame comprising two longitudinally extending vehicle beams; The cutting platform is set on the lower side of the frame and is used for cutting grass; A battery pack is mounted on the vehicle frame and is used to supply power to the header. The header lifting device comprises: Hookup parts, connecting the frame and the header; An operating member connected to the attachment member, wherein the controlled movement of the operating member drives the attachment member to move and causes the height of the header to change; At least one of the connection points between the connection member and the vehicle frame is located at the outer side areas of the two vehicle beams.

33. A lawn mower, characterized in that: include: A vehicle frame comprising two longitudinally extending vehicle beams; A seat, provided on the frame, for the user to sit on; The cutting platform is set on the lower side of the frame and is used for cutting grass; The header lifting device comprises: Hookup parts, connecting the frame and the header; An operating member connected to the attachment member, wherein the controlled movement of the operating member drives the attachment member to move and causes the height of the header to change; At least one of the connection points between the connection member and the vehicle frame is located at the outer side areas of the two vehicle beams.

34. The lawn mower according to claim 33, wherein: The hanging parts include two rear hanging parts and one front hanging part, wherein one of the rear hanging parts is located at the outer side areas of the two vehicle beams.

35. The lawn mower according to claim 34, characterized in that: The distance between the rear hanging part and the seat is smaller than the distance between the front hanging part and the seat.

36. A lawn mower, characterized in that: include: A vehicle frame comprising two longitudinally extending vehicle beams; The cutting platform is set on the lower side of the frame and is used for cutting grass; The battery pack is connected to the frame and is used to supply power to the header; The header lifting device comprises: Hookup parts, connecting the frame and the header; An operating member connected to the attachment member, wherein the controlled movement of the operating member drives the attachment member to move and causes the height of the header to change; At least one of the connection points between the connection member and the vehicle frame is located at the outer side areas of the two vehicle beams.

37. A cutting table lifting device, connected to the frame and cutting table of a lawn mower, characterized in that: include: Control parts; A translation mechanism connects the header and the frame and is used to limit the header to maintain a constant angle with the frame when moving; A linkage mechanism connects the operating member and the translation mechanism, and when the operating member is pulled by the user, the cutting platform is driven to move upward or downward; A shift member is connected to the vehicle frame, and the shift member includes a slideway with an operating member running through it and shift slots located on both sides of the slideway. At least one of the shift slots is not at the same height as any shift slot on the other side of the slideway. When the operating member is engaged with the shift slot, it cannot drive the cutting platform to move.

38. The header lifting device according to claim 37, characterized in that: When the cutting platform is raised, the movement direction of the operating member is the upward direction, and the side wall of the gear groove in the upward direction is inclined and points to the upward direction from the gear groove to the slide direction.

39. The header lifting device according to claim 37, characterized in that: When the cutting platform is lowered, the movement direction of the operating member is the downward direction, and the side wall of the gear groove in the downward direction extends from the gear groove to the slideway without being inclined to point to the downward direction.

40. The header lifting device according to claim 39, characterized in that: The side wall of the shift groove in the downward direction is inclined from the shift groove to the slide direction and points in the opposite direction of the downward direction.

41. The header lifting device according to claim 37, characterized in that: The height of the cutting platform above the ground when the operating member is not fully matched with the gear slot is greater than the height of the cutting platform above the ground when the operating member is fully matched with the same gear slot.

42. The header lifting device according to claim 37, characterized in that: The operating member is provided with a clamping plate capable of cooperating with the shift slot on one side. The width of the shift slot is greater than the thickness of the clamping plate and smaller than the dimension of the operating member along the width direction of the shift slot.

43. The header lifting device according to claim 37, characterized in that: The number of the shift slots is greater than 10.

44. The header lifting device according to claim 43, characterized in that: The ratio of the lifting stroke (in) of the header to the number of gear slots is less than 0.

3.

45. A lawn mower, characterized in that: include: Frame; The cutting platform is set on the lower side of the frame and is used for cutting grass; A battery pack is mounted on the vehicle frame and is used to supply power to the header; The header lifting device comprises: Control parts; A translation mechanism connects the header and the frame and is used to limit the header to maintain a constant angle with the frame when moving; A linkage mechanism connects the operating member and the translation mechanism, and when the operating member is pulled by the user, the cutting platform is driven to move upward or downward; A shift member is connected to the vehicle frame, and the shift member includes a slideway with an operating member running through it and shift slots located on both sides of the slideway. At least one of the shift slots is not at the same height as any shift slot on the other side of the slideway. When the operating member is engaged with the shift slot, it cannot drive the cutting platform to move.

46. ​​The lawn mower according to claim 45, characterized in that: The product of the lifting stroke (in) of the cutting platform, the number of gear slots and the curb weight (kg) of the mower is greater than 1×10 3 Less than or equal to 6×10 4 (in·Kg).

47. A cutting table lifting device, connected to the frame and cutting table of a lawn mower, characterized in that: include: The operating member rotates around a first rotating shaft provided on the vehicle frame; The translation mechanism connects the header and the frame and is used to limit the header to maintain a constant angle with the frame when moving; A linkage mechanism connects the operating member and the translation mechanism, and drives the header to move upward or downward when the operating member is pulled by the user; A shift member includes a shift slot and is connected to the vehicle frame, wherein the operating member cannot drive the header to move when engaged with the shift slot; An elastic member connecting the operating member and the linkage mechanism; The linkage mechanism comprises: The height-adjusting shaft end plate is connected to the operating member and the first rotating shaft, and the operating member rotates around the first rotating shaft along with the height-adjusting shaft end plate; a second rotating shaft connecting the operating member and the height adjustment shaft end plate, wherein the operating member is capable of rotating about the second rotating shaft; and a position state of the operating member rotating about the second rotating shaft includes an in-gear state in which the operating member is engaged with the gear slot and a disengaged state in which the operating member is disengaged from the gear slot; The deformation amount of the elastic member when the operating member is in the gear-in state is smaller than the deformation amount when the operating member is in the gear-out state.

48. The header lifting device according to claim 47, characterized in that: The linkage mechanism comprises: A pull rod connecting the height adjustment shaft end plate and the translation mechanism; When the operating member rotates around the first rotating shaft, the height-adjusting shaft end plate rotates with it and pulls the pull rod to move, so that the height of the cutting platform changes.

49. The header lifting device according to claim 48, characterized in that: The linkage mechanism further includes a height-adjusting swing arm connected to the first rotating shaft, and the pull rod is rotatably connected to the height-adjusting swing arm.

50. The header lifting device according to claim 47, characterized in that: The elastic member is a tension spring with two ends respectively connected to the operating member and the height-adjusting shaft end plate.

51. The header lifting device according to claim 47, characterized in that: The force along the first rotation axis overcome by the operating member when it is moved from the in-gear state to the out-gear state is 3N to 30N.

52. The header lifting device according to claim 47, characterized in that: The shifting member includes a slideway and shifting slots are provided on both sides of the slideway. When the operating member rotates around the first rotating shaft, it slides in the slideway. When the operating member rotates around the second rotating shaft to either side, it enters the shifting slot on the corresponding side.

53. The header lifting device according to claim 52, characterized in that: A spring slot parallel to the second rotating shaft is provided on the end plate of the height adjustment shaft, and the elastic member is a tension spring with one end sliding in the spring slot; when the operating member enters the gear slot on either side, the end of the tension spring slides to the corresponding side of the spring slot.

54. A lawn mower, characterized in that: include: Frame; The cutting platform is set on the lower side of the frame and is used for cutting grass; A battery pack is mounted on the vehicle frame and is used to supply power to the header; The header lifting device comprises: The operating member rotates around a first rotating shaft provided on the vehicle frame; The translation mechanism includes a front attachment and a rear attachment hinged at both ends to the vehicle frame and the header. The rear attachment is composed of rear attachment plates located on the left and right sides of the vehicle frame. The front attachment, the vehicle frame, the rear attachment, and the header form a parallelogram structure, so that the header maintains a constant angle with the vehicle frame when moving. A linkage mechanism connects the operating member and the rear hitch, wherein the operating member rotates around the first rotating shaft to drive the cutting platform to move upward or downward; A shift member includes a shift slot and is connected to the vehicle frame, wherein the operating member cannot drive the header to move when engaged with the shift slot; An elastic member connecting the operating member and the linkage mechanism; The linkage mechanism comprises: The height-adjusting shaft end plate is connected to the operating member and the first rotating shaft, and the operating member rotates around the first rotating shaft along with the height-adjusting shaft end plate; a second rotating shaft connecting the operating member and the height adjustment shaft end plate, wherein the operating member is capable of rotating about the second rotating shaft; and a position state of the operating member rotating about the second rotating shaft includes an in-gear state in which the operating member is engaged with the gear slot and a disengaged state in which the operating member is disengaged from the gear slot; The deformation amount of the elastic member when the operating member is in the gear-in state is smaller than the deformation amount when the operating member is in the gear-out state.

55. The lawn mower according to claim 54, characterized in that The rear hanging member is located outside the left and right edges of the frame.

56. The lawn mower according to claim 55, characterized in that The distance between the rear hanging part and the outer edge of the frame in the left and right directions of the frame is in the range of 0 to 50 mm.

57. A cutting table lifting device, connected to the frame and cutting table of a lawn mower, characterized in that: include: Control parts; A translation mechanism connects the header and the frame and is used to limit the header to maintain a constant angle with the frame when moving; A linkage mechanism connects the operating member and the translation mechanism, and drives the cutting platform to move upward or downward when the operating member moves; The linkage mechanism comprises: a first rotating shaft, disposed on the vehicle frame, wherein the first rotating shaft rotates when the header moves in an up and down direction; A quick-pull locking component is connected to the vehicle frame and the first rotating shaft, and limits the first rotating shaft from further rotating when the rotating speed of the first rotating shaft is greater than the first rotating speed.

58. The header lifting device according to claim 57, characterized in that: The first rotation speed is 0.1 revolutions per second.

59. The header lifting device according to claim 57, characterized in that: The first rotation speed is 0.3 revolutions per second.

60. The header lifting device according to claim 57, characterized in that: The quick-pull locking member comprises: a lock housing, configured on the vehicle frame; A lock cylinder is disposed on the first rotating shaft; A lock tongue movably connected to one of the lock housing and the lock cylinder; A reset member is connected to the lock tongue. When the reset member limits the rotation speed of the first rotating shaft to be less than the first rotation speed, the lock tongue does not abut the other one of the lock housing and the lock core; when the rotation speed of the first rotating shaft is greater than the first rotation speed, the lock tongue abuts the other one of the lock housing and the lock core, so that the first rotating shaft cannot rotate.

61. The header lifting device according to claim 60, characterized in that: When the first rotating shaft rotates in the forward direction at a speed greater than the first speed, the lock tongue abuts against the other of the lock housing and the lock core, preventing the first rotating shaft from rotating; when the first rotating shaft rotates in the reverse direction at a speed greater than the first speed, the lock tongue does not abut against the other of the lock housing and the lock core.

62. The header lifting device according to claim 60, characterized in that: The lock housing is provided with an abutment portion, and the lock tongue moves and abuts against the abutment portion when the speed of the first rotating shaft is greater than the first rotating speed.

63. The header lifting device according to claim 60, characterized in that: The abutting force exerted on the lock tongue when it abuts against the other of the lock housing and the lock core causes the lock tongue to tend to approach the other of the lock housing and the lock core.

64. The header lifting device according to claim 60, characterized in that: The reset member is configured as at least one of a compression spring, a tension spring, and a torsion spring.

65. The header lifting device according to claim 57, characterized in that: The header lifting device is equipped with at least two quick-pull locking members, one of which limits the first rotating shaft from continuing to rotate when the first rotating shaft rotates forward at a speed greater than the first speed, and the other quick-pull locking member limits the first rotating shaft from continuing to rotate when the first rotating shaft rotates reversely at a speed greater than the first speed.

66. A lawn mower, characterized in that: include: Frame; The cutting platform is set on the lower side of the frame and is used for cutting grass; A battery pack is mounted on the vehicle frame and is used to supply power to the header; The header lifting device comprises: Control parts; A translation mechanism connects the header and the frame and is used to limit the header to maintain a constant angle with the frame when moving; A linkage mechanism connects the operating member and the translation mechanism, and when the operating member is pulled by the user, the cutting platform is driven to move upward or downward; The linkage mechanism comprises: a first rotating shaft, disposed on the vehicle frame, wherein the first rotating shaft rotates in a positive direction when the header moves upward; A quick-pull locking component is connected to the vehicle frame and the first rotating shaft, and limits the first rotating shaft from further rotating when the rotating speed of the first rotating shaft is greater than the first rotating speed.

67. A cutting table lifting device, connected to the frame and cutting table of a lawn mower, characterized in that: include: Control parts; A translation mechanism connects the header and the frame and is used to limit the header to maintain a constant angle with the frame when moving; A linkage mechanism connects the operating member and the translation mechanism, and when the operating member is pulled by the user, the cutting platform is driven to move upward or downward; A shift member connected to the vehicle frame, the shift member comprising a slideway through which the operating member passes and shift slots located on both sides of the slideway, wherein the operating member cannot drive the cutting platform to move when engaged with the shift slots; The operating member has a first position when it cooperates with the centering portion, and the operating member at the first position is at the same distance from the shift slots on both sides.

68. The header lifting device according to claim 67, characterized in that: The linkage mechanism comprises: a second rotating shaft, wherein the operating member moves toward the shift slot on one side when the operating member moves around the second rotating shaft; The elastic member is connected to the operating member. When the operating member is closer to the shifting slot on one side, the elastic member drives the operating member to move toward the shifting slot on the side that is closer.

69. The header lifting device according to claim 68, characterized in that: When the operating member is located at the first position, the elastic member does not generate a force on the operating member toward one side of the shifting slot.

70. The header lifting device according to claim 67, characterized in that: The cutting platform moves upward or downward when the operating member moves along the slideway of the shifting member; and the cutting platform is located at the highest point of the up-down movement when the operating member cooperates with the centering portion.

71. The header lifting device according to claim 67, characterized in that: The operating member is at least partially cylindrical in structure, and the centering portion is configured as a centering groove opened in the shifting member and capable of cooperating with the cylindrical structure of the operating member.

72. The header lifting device according to claim 68, characterized in that: At least a portion of the operating member located at the first position is located on the same straight line as the projection of the second rotation axis on the ground.

73. The header lifting device according to claim 68, characterized in that: The centering portion is configured as a positioning block detachably connected to the stopper. When the positioning block is engaged with the stopper, it cannot move along the movement direction of the operating member. A centering groove engaging with the operating member is provided on the positioning block.

74. The header lifting device according to claim 68, characterized in that: The header moves downward when the operating member moves in the first direction, and the operating member cannot move in the first direction when it cooperates with the centering portion.

75. A lawn mower, characterized in that: include: Frame; The cutting platform is set on the lower side of the frame and is used for cutting grass; A battery pack is mounted on the vehicle frame and is used to supply power to the header; The header lifting device comprises: Control parts; A translation mechanism connects the header and the frame and is used to limit the header to maintain a constant angle with the frame when moving; A linkage mechanism connects the operating member and the translation mechanism, and when the operating member is pulled by the user, the cutting platform is driven to move upward or downward; a shift member connected to the vehicle frame, the shift member comprising a slideway through which the operating member passes and shift slots located on both sides of the slideway; The operating member has a first position when it cooperates with the centering portion, and the operating member at the first position is at the same distance from the shift slots on both sides.

76. The lawn mower according to claim 75, characterized in that: The lawn mower further comprises a seat arranged on the frame, and the operating member is located on the left and / or right side of the seat.

77. A cutting table lifting device, connected to the frame and cutting table of a lawn mower, characterized in that: include: Control parts; A translation mechanism connects the header and the frame and is used to limit the header to maintain a constant angle with the frame when moving; A linkage mechanism connects the operating member and the translation mechanism, and when the operating member is pulled by the user, the cutting platform is driven to move upward or downward; a stopper connected to the vehicle frame, the stopper comprising a slideway and a stopper groove through which an operating member passes, wherein the header cannot move downward when the operating member is engaged with the stopper groove; A blocking piece is connected to the vehicle frame, and the header cannot move upward when the operating piece is engaged with the blocking piece.

78. The header lifting device according to claim 77, characterized in that: The operating member can cooperate with the blocking member when the header is at least close to the lowest point.

79. The header lifting device according to claim 77, characterized in that: The locking member is configured on the shifting member.

80. The header lifting device according to claim 78 or 79, characterized in that: The blocking member is configured as a hook for limiting the upward movement of the operating member when cooperating with the operating member.

81. The header lifting device according to claim 80, characterized in that: The operating member is provided with a groove for matching with the hook.

82. The header lifting device according to claim 81, characterized in that: The operating member is provided with a clamping plate for matching the shifting groove, and the groove is opened on the clamping plate.

83. The header lifting device according to claim 78, characterized in that: The linkage mechanism includes an elastic member connected to the operating member, which is used to generate a force on the operating member to move toward the shift slot.

84. The header lifting device according to claim 83, characterized in that: The locking member is configured to at least overcome a portion of the elastic force of the elastic member on the operating member in order to release the engagement with the operating member.

85. The header lifting device according to claim 77, characterized in that: The cutting platform lifting device also includes a buffer member connected to the frame and the linkage assembly, which is used to reduce the pulling force when the user pulls the operating member to raise the cutting platform. The locking member is configured to at least overcome part of the elastic force of the buffer member on the operating member before it can release its cooperation with the operating member.

86. A lawn mower, characterized in that include: Frame; The cutting platform is set on the lower side of the frame and is used for cutting grass; A battery pack is mounted on the vehicle frame and is used to supply power to the header. The header lifting device comprises: Control parts; A translation mechanism connects the header and the frame and is used to limit the header to maintain a constant angle with the frame when moving; A linkage mechanism connects the operating member and the translation mechanism, and when the operating member is pulled by the user, the cutting platform is driven to move upward or downward; a stopper connected to the vehicle frame, the stopper comprising a slideway and a stopper groove through which an operating member passes, wherein the header cannot move downward when the operating member is engaged with the stopper groove; A blocking piece is connected to the vehicle frame, and the header cannot move upward when the operating piece is engaged with the blocking piece.

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