Lawn mower and header lifting device

Abstract

The utility model relates to a mowing machine and a header lifting device. The mowing machine comprises a frame, the header lifting device, a header, a hanging piece and an operating piece. The hitching piece is connected with the vehicle frame and the header, the control piece is connected to the hitching piece, the control piece is controlled to move to drive the hitching piece to move and drive the height of the header to change, and at least one of hitching points of the hitching piece and the vehicle frame is located in the outer side area of the two vehicle beams. At least one hanging point of the header is arranged in the outer space of the frame, and the hanging point is taken as a rotating point, so that the gap between arms of force on two sides is increased, the moment of force on the outer side is difficult to be larger than that on the inner side when a large-weight user treads the header, and the header can be more stable in the left-right direction. The problem that the other side of the header is easy to tilt when a user steps on the header is avoided, and the user experience is improved.

Description

[Technical field]

[0001] The utility model relates to the technical field of gardening operation vehicles, in particular to a lawn mower and a cutting platform lifting device. [Background Technology]

[0002] Outdoor gardening operation vehicles generally refer to vehicles used for outdoor gardening operations, mainly including vehicles used for cutting and maintaining garden grass.

[0003] The lawn mower is one of the garden operation vehicles that has developed rapidly in recent years. It is provided with a liftable cutting table, and a cutting knife is arranged inside the cutting table to cut and maintain the grass on the ground. Since the cutting table is wider than the frame, the user may accidentally step on the cutting table as a step to get on the vehicle when stepping onto the lawn mower from the ground; the narrower hanging point in the prior art may cause the other side of the cutting table to tilt up when stepped on by the user; at this time, the user may be startled or even fall, resulting in a poor user experience.

[0004] In view of this, it is indeed necessary to provide a lawn mower and a cutting table lifting device to overcome the defects of the prior art. [Contents of the utility model]

[0005] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a lawn mower and a cutting table lifting device which can prevent the user from stepping on the cutting table, which may cause the other side of the cutting table to tilt up.

[0006] The technical solution adopted by the utility model to solve the existing technical problems is:

[0007] A cutting platform lifting device is connected to a frame and a cutting platform, wherein the frame includes two beams extending in the longitudinal direction, including:

[0008] A hitch, connecting the frame and the header;

[0009] 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;

[0010] 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.

[0011] A further improved solution is: the hanging member includes a front hanging member and two rear hanging plates, and the distance between one of the rear hanging plates and the outer edge of the vehicle beam in the left and right directions of the frame is in the range of 0 to 50 mm.

[0012] A further improvement is that the two ends of the front mounting member and the rear mounting plate are rotatably connected to the frame and the cutting table, and the front mounting member, the frame, the rear mounting plate and the cutting table form a parallelogram structure, so that the cutting table maintains a constant angle with the frame when moving.

[0013] 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.

[0014] 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.

[0015] The utility model also discloses a lawn mower, comprising:

[0016] The vehicle frame comprises two vehicle beams extending in the longitudinal direction;

[0017] A cutting table, which is arranged on the lower side of the frame and is used for cutting grass;

[0018] A battery pack is arranged on the vehicle frame and is used to supply power to the header;

[0019] The header lifting device comprises:

[0020] A hitch, connecting the frame and the header;

[0021] 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;

[0022] 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.

[0023] The utility model also discloses another lawn mower, comprising:

[0024] The vehicle frame comprises two vehicle beams extending in the longitudinal direction;

[0025] A seat, arranged on the frame, for a user to sit on;

[0026] A cutting table, which is arranged on the lower side of the frame and is used for cutting grass;

[0027] The header lifting device comprises:

[0028] A hitch, connecting the frame and the header;

[0029] 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;

[0030] 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.

[0031] A further improved solution is: the hanging member includes two rear hanging plates and a front hanging member, and one of the rear hanging plates is located at the outer side area of ​​the two vehicle beams.

[0032] A further improvement is that the distance between the rear mounting plate and the seat is smaller than the distance between the front mounting member and the seat.

[0033] The utility model also discloses another lawn mower, comprising:

[0034] The vehicle frame comprises two vehicle beams extending in the longitudinal direction;

[0035] A cutting table, which is arranged on the lower side of the frame and is used for cutting grass;

[0036] A battery pack, connected to the frame, for supplying power to the header;

[0037] The header lifting device comprises:

[0038] A hitch, connecting the frame and the header;

[0039] 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;

[0040] 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.

[0041] Compared with the prior art, the utility model has the following beneficial effects:

[0042] The utility model proposes to set at least one hanging point of the cutting table in the outer space of the frame, and take the hanging point as the rotation point. The technical solution of the utility model increases the difference between the force arms on both sides, and it is difficult for a heavy user to make the torque on the outer side greater than that on the inner side. Under this solution, the left and right directions of the cutting table can be made more stable, avoiding the problem of the other side of the cutting table being easily lifted up when the user steps on the cutting table, thereby improving the user experience. [Drawings]

[0043] The specific implementation of the utility model is further described in detail below in conjunction with the accompanying drawings:

[0044] Figure 1 It is a three-dimensional view of the lawn mower of the utility model;

[0045] Figure 2 yes Figure 1 A three-dimensional view of the mid-frame and the header lifting device;

[0046] Figure 3 yes Figure 2 a top view of the structure shown;

[0047] Figure 4 yes Figure 2 A stereoscopic view of the structure shown from another perspective;

[0048] Figure 5 yes Figure 2 A partial structural schematic diagram of a header lifting device is shown;

[0049] Figure 6, Figure 7 It is a schematic diagram of the structure of the height adjustment shaft end plate and the operating parts;

[0050] Figure 8 It is a structural schematic diagram of a single-side limit block in the utility model;

[0051] Fig. 9 It is a schematic diagram of an embodiment of the utility model in which a single-side limit block is assembled to an end plate of a height-adjusting shaft;

[0052] Fig.10 This is a schematic diagram of the structure of the double-sided limit block in the utility model.

[0053] Fig.11 It is a schematic diagram of an embodiment of the utility model in which the double-sided limit block is assembled to the height adjustment shaft end plate;

[0054] Fig.12 It is a schematic diagram of an embodiment of the utility model in which a single-side limit block is assembled to a control member;

[0055] Fig.13 It is a schematic diagram of an embodiment of the double-sided limit block being assembled to the operating member in the utility model;

[0056] Fig.14 This is a schematic diagram of an embodiment of the present invention in which two single-side limit blocks are used in combination;

[0057] Fig.15 , 16 This is a schematic diagram of another embodiment of the present invention in which two limit blocks are used in combination;

[0058] Fig.17 , 18 This is a schematic diagram of another embodiment of the present invention in which two limit blocks are used in combination;

[0059] Fig.19 , 20 This is a schematic diagram of an embodiment of the utility model in which two limit rings are used in combination;

[0060] Fig.21 , 22 yes Fig. 20 Schematic diagram of the structure shown in different states;

[0061] Fig.23 is a structural schematic diagram of another embodiment of a limiter;

[0062] Fig.24 , 25 is a structural schematic diagram of another embodiment of a limiter;

[0063] Fig.26 is a structural schematic diagram of another embodiment of a limiter;

[0064] Fig. 27 This is a schematic diagram of an embodiment in which a tension spring is selected as the elastic member;

[0065] Fig.28 It is a schematic diagram of another embodiment in which the elastic member is a tension spring;

[0066] Fig.29 yes Fig.28 A schematic diagram of another state of the structure shown;

[0067] Fig.30 yes Fig.29 a side view of the structure shown;

[0068] Fig.31 yes Fig.28 A partial schematic diagram of the structure shown with upper connection point trajectory lines;

[0069] Fig.32 It is a partial structural diagram of a header lifting device with a shifting member;

[0070] Fig.33 It is a schematic diagram of the structure of the gear shifting member;

[0071] Fig.34 yes Figure 2 An enlarged view of the mid-height swing arm.

[0072] Meaning of the reference numerals in the figures:

[0073] 1. Frame; 2. Seat; 3. Cutting table; 4. First rotating shaft; 5. Height adjustment arm; 6. Pull rod; 7. Rear mounting plate; 8. Front mounting part; 9. Height adjustment shaft end plate; 10. Shift member; 101. Slide; 102. Shift slot; 11. Operating member; 12. Elastic member; 121. Tension spring; 122. Compression spring; 13. Limiting member; 131. Limiting block; 1311. Single-sided limiting block; 1312. Double-sided limiting block; 1313. Concave limiting block; 132. Limiting ring; 1321. Convex limiting ring; 1322. Concave limiting ring; 14. Clamp; 15. Spring slot. [Specific implementation method]

[0074] The terms used in the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. For example, the words "upper", "lower", "front", "back" and the like indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0075] Unless otherwise specified, the terms "disposed", "connected" and "connected" in this utility model should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. "Fixed connection" in this utility model should also be understood in a broad sense as integral molding or welding or connection through other fasteners.

[0076] Further explanation: 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 changing curvature (or slope).

[0077] See also Figure 1 , shown is a lawn mower disclosed in the utility model, including a frame 1 and a support platform arranged on the frame 1 and used to support a user, a cutting table 3 arranged on the lower side of the frame 1, and a cutting table lifting device connecting the frame 1 and the cutting table 3.

[0078] The cutting platform lifting device comprises: an operating member 11 for a user to hold and pull, a translation mechanism, a linkage mechanism and a shifting member 10 .

[0079] The translation mechanism connects the header 3 and the frame 1, and is used to limit the header 3 to maintain an angle with the frame 1 when moving; specifically, refer to the attached Figures 1 to 4 The translation mechanism includes a front mounting member 8 and a rear mounting plate which are hinged at both ends to the frame 1 and the cutting platform 3. The rear mounting plate 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 plate 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.

[0080] 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 no further description is made), and when the operating member 11 is pulled by the user, the cutting table 3 is driven to move upward or downward.

[0081] 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.

[0082] 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 a gear state position that cooperates with the gear slot 102 and a disengaged state position that is disengaged from the gear slot 102.

[0083] For further information, see Attachment Figure 6 , Figure 7 The linkage mechanism also 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 a curved surface is provided on the limiter 13. 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 against the limiter 13. The curved surface of the limiter 13 abuts against the operating member 11 and generates a deflection force that causes the operating member 11 to deflect to the in-block state. That is, the elastic force of the elastic member 12 when the operating member 11 is in the in-block state is less than the elastic force of the operating member 11 in the out-of-block state.

[0084] The operating member 11 and / or the height-adjusting shaft end plate 9 are provided with threaded holes, and the limiting member 13 is provided with mounting holes. The limiting member 13 is matched with the threaded holes of the operating member 11 and / or the height-adjusting shaft end plate 9 by bolts passing through the mounting holes, so as to complete the fixed installation of the limiting member 13. In order to save space at the limiting member, an internal thread is provided in the threaded hole, and the bolt and the threaded hole are threadedly matched to realize the connection between the two; in other connection methods, it can also be fixed by bolts and nuts, or realized by other methods such as welding and integral molding.

[0085] Reference Figure 4 , Figure 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-adjusting 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-adjusting 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.

[0086] For further information, please refer to the attached Figure 4 , Figure 5The 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 supporting platform (the supporting platform in the accompanying drawing 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 a large force is required to pull the operating member 11. Therefore, the solution in the prior art that the operating member 11 is located on the lower right side consumes a large amount of waist strength of the user, and may cause lumbar muscle injury; the present embodiment adds a height-adjusting swing arm 5, so that the operating member 11 can be not set 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.

[0087] The force along the direction of the first rotating shaft 4 that the operating member 11 overcomes when it is moved from the in-gear state to the out-of-gear state is 3N~30N. This force is not limited to the magnitude of the shifting force applied to the operating member 11, but the magnitude of the component of the shifting force along the direction of the first rotating shaft 4 is 3N~30N. If the shifting force is parallel to the first rotating shaft 4, the above-mentioned component force is equal to the shifting force; generally, 10N is preferred. This force range is relatively reasonable and the operation is more comfortable.

[0088] One end of the operating member 11 is bent to form a second rotating shaft, and two 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 driving the operating member 11 to move toward the limiting member 13 .

[0089] The height-adjusting shaft end plate 9 includes a baffle plate perpendicular to the second rotating shaft. The second rotating shaft passes through the baffle plate. The elastic member 12 is sleeved on the second rotating shaft, and two ends of the elastic member 12 are respectively connected to the baffle plate and the second rotating shaft.

[0090] Reference Figure 8 , Fig. 9 , respectively, are 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; Figure 8 As shown, the limit member 13 uses a unilateral limit block 1311. The end of the unilateral limit block 1311 close to the operating member 11 has a curved surface along the rotation direction around the second rotating axis. The curved surface has a height difference in the axial direction of the second rotating axis. The part of the curved surface close to the operating member 11 is regarded as a convexity, and the part away from it is regarded as a concave. The elastic member 12 in this embodiment is a compression spring 122. The elastic force applied by the compression spring 122 to the operating member 11 makes it resist against the unilateral limit block 1311, and the resisting position is located at the curved surface of the unilateral limit block 1311. The contact force of the curved surface on the operating member 11 has a component force pointing to the concave part, so it can have a tendency to make the operating member 11 move around the second rotating axis to be away from the convexity until the operating member 11 moves to cooperate with the gear slot 102 and is in the gear state.

[0091] 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 axis 4, it slides in the slide 101. When the operating member 11 rotates to either side around the second rotating axis, 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.

[0092] For details, please refer to the attached Fig.10 , Fig.11 , 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 uses a double-sided limiting block 1312 fixed to the height adjustment shaft end plate 9. 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 part of the curved surface close to the operating member 11 is regarded as a convexity, and the part away from it is regarded as a concave; in this embodiment, the middle part of the two curved surfaces close to each other is a convexity , both sides are recessed; the elastic member 12 in this embodiment is also a compression spring 122, and the elastic force applied by the compression spring 122 to the operating member 11 makes it resist against the double-sided limit block 1312, and the resisting position is located at the curved surface on either side of the double-sided limit block 1312. The double-sided limit block 1312 exerts a lateral component of force on the abutment force of 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 middle protrusion until the operating member 11 moves to cooperate with the gear slot 102 and is in the gear state.

[0093] Reference Figure 8 , Fig.12 , are respectively a schematic diagram of a limiting member 13 of a third embodiment and a schematic diagram of a matching state of the limiting member 13 and the height-adjusting shaft end plate 9. The limiting member 13 of this embodiment uses 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-adjusting shaft end plate 9 is regarded as a convexity, and the portion away from the curved surface is regarded as a concave; and the height-adjusting shaft end plate 9 close to the limiting member A protrusion is provided on one side of the block 131; the elastic member 12 in the present embodiment 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, and the abutting force of the curved surface on the protrusion has a component force pointing to the recessed part, and the protrusion is subjected to the reaction force and has the 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.

[0094] Reference Fig.10 , Fig.13 , are respectively a schematic diagram of the limiting member 13 of the fourth 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 uses a double-sided limiting block 1312 fixed to the height adjustment shaft end plate 9. The double-sided limiting 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 part of the curved surface close to the height adjustment shaft end plate 9 is regarded as a convexity, and the part away from it is regarded as a concave; in this embodiment, the middle part of the two curved surfaces close to each other is a convexity, and the two sides are concave ; and a protrusion is provided on one 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 makes the double-sided limit block 1312 and the protrusion abut against each other, and the abutting position is located at the curved surface of the double-sided limit block 1312, and the abutting force of the curved surface on the protrusion has a component force pointing to the recessed part, 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.

[0095] In the above-mentioned first and second embodiments, the limiting member 13 and the operating member 11 directly abut against each other, but the operating member 11 is a rod-shaped structure, and the abutment effect between the limiting member 13 and the operating member 11 is similar to the abutment between the protrusion and the limiting member 13 in the third and fourth embodiments.

[0096] In the above-mentioned embodiment, the limiting member 13 is only provided at 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 at the operating member 11. When the curved surfaces of the two limiting members 13 counteract each other, a force that deflects the operating member 11 may be generated to move the operating member 11 to the blocking state. The details are as follows:

[0097] Reference Figure 8 , Fig.14 , Fig.14 This is a schematic diagram of the connection status 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 are 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.

[0098] Reference Fig.15 , Fig.16 , Fig.15Schematic diagram of the structure of the stopper 13 of the sixth embodiment. Fig.16 Schematic diagram of the connection state of the limit member 13 and the limit member 13, the height adjustment shaft end plate 9 and the operating member 11 in the sixth embodiment. In this embodiment, the limit blocks 131 include two types, one of which is a convex limit block with a protrusion (refer to the double-sided limit block 1312 in the attached figure), 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 surface of the concave limit block 1313 offset each other to produce an operation The component force of the deflection of the longitudinal member 11 drives the operating member 11 to deflect to cooperate with the gear slot 102 and be in a geared state. This embodiment can generate component forces 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 another 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.

[0099] Reference Fig.17 , Fig.18 , Fig.17 Schematic diagram of the connection state of the limiting member 13 and the limiting member 13, the height adjustment shaft end plate 9, and the operating member 11 of the seventh embodiment. In this embodiment, there is only one type of limiting block 131, which is a convex limiting block with a protrusion as shown in the figure. The protrusion of the convex limiting block includes curved surfaces on both sides and a vertex in the middle. The curved surfaces of the two convex limiting 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 produce A component force for deflection on both sides is generated. 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, so that when the operating member 11 is closer to the shifting groove 102 on one side, the abutting force generated by the limit block 131 drives the operating member 11 into the shifting groove 102 on the corresponding side.

[0100] In addition, the stopper 13 in each of the above embodiments only has a single point abutting effect at the same time. In other embodiments, the stopper 13 may be an annular structure, and the protrusions and / or depressions are symmetrically arranged on the surface of the stopper 13 to produce an abutting effect, as follows:

[0101] Reference Figures 19 to 22, is a schematic diagram of the limiting member 13 of the eighth 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 a limiting ring 132 of an annular structure. The limiting ring 132 is symmetrically provided with two protrusions. The two protrusions on the single limiting ring 132 in the figure are symmetrical up and down. The operating member 11 is in a disengaged state when the protrusions of the two limiting rings 132 abut against each other. At this time, the elastic force of the elastic member 12 causes the two limiting rings 132 to abut against each other horizontally, so that the operating member 11 has a tendency to move horizontally and deviate to the blocking state. It is particularly noted that, referring to the attached Fig. 20 In this state, the protruding tops of the two limit members 13 are against each other. Although there is no lateral force, this state is obviously unstable. If the user applies a slight lateral force or the vehicle vibrates slightly, the operating member 11 will be displaced to a certain extent and enter the position as shown in FIG. Fig.21 or Fig. 22 state, at this time the operating member 11 is deflected to the corresponding side of the shifting groove 102. Further expandable, a single limiting ring 132 is symmetrically provided with more than two protrusions, which can also achieve the same technical effect, and the specific scheme is similar, which will not be repeated here.

[0102] Reference Fig.23 , are other embodiments of the present invention, shown in the figure are annular and mutually cooperating limit rings 132, one of which is located at the height adjustment shaft end plate 9, and the other is located at 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.

[0103] Reference Fig.24 , Fig.25 , is another embodiment of the present invention, the figure shows a ring-shaped and mutually matching stop ring 132, two stop rings 132 are respectively located at the height adjustment shaft end plate 9 and the operating member 11, and one of the stop rings 132 is provided with a protrusion, and the other stop ring 132 is provided with a depression, but different from the attached Fig.23 In the embodiment shown, a protrusion is provided on the upper and lower sides of the convex limiting ring of this embodiment, and two recesses are provided on the upper and lower sides of the concave limiting ring. This embodiment is applicable to the technical solution in which the left and right sides of the aforementioned shifting member 10 are provided with shifting grooves 102. When the protrusion of the convex limiting ring cooperates with any one of the recesses, the operating member 11 is in the shifting 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.

[0104] Reference Fig.26Another embodiment of the present invention, the figure shows a ring-shaped and mutually matching stop ring 132, two stop rings 132 are respectively located at the height adjustment shaft end plate 9 and the operating member 11, and one of the stop rings 132 is provided with a protrusion, and the other stop ring 132 is provided with a depression, but different from the attached Fig.23 , Fig.24 , Fig.25 In the embodiment shown, the limiting ring 132 of this embodiment has more protrusions and depressions, and the number of single-sided depressions is one more than the number of protrusions at the corresponding positions. At this time, the two limiting rings 132 have two stable states that cooperate with each other, corresponding to the technical solution of setting two rows of shift grooves 102 on the left and right sides of the shifting member 10; when the two limiting rings 132 are in a state between the two stable states, the operating member 11 is in a disengaged state.

[0105] In addition, the above Figure 8 , Fig. 9 , Fig.12 , Fig.14 , Fig.15 , Fig.16 , Fig.23 In the embodiment shown, the extreme deflection position of the operating member 11 is kept against the curved surface of the stop 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, which corresponds to the operating member 11 being in a blocking state. Fig.11 , Fig.13 , Fig.17 , Fig.18 , Fig.19 , Fig. 20 , Fig.21 , Fig. 22 , Fig.24 , Fig.25 , Fig.26 In the embodiment shown, the two extreme positions of the operating member 11 rotating around the second rotation axis are both in a stable state. At this time, it is applicable to the state that the operating member 11 is in the gear at both extreme positions; however, it should be noted that the technical solution that the limit member 13 can achieve two stable states is not completely unapplicable to the single-sided gear slot 102 solution. It only needs to limit the maximum rotation position of the operating member 11 through an external structure so that it cannot be moved from Fig.21 Exercise to Fig. 22 In the state shown, the specific external structure only needs to set a blocking structure on the height adjustment shaft end plate 9 or the shifting member 10 or the frame 1 to produce a blocking effect on the operating member 11, and it will not be described in detail here.

[0106] Further, a specific solution is provided in which the operating member 11 is in the gear state when it is located at both sides: a gear slot 102 is provided on both sides of the gear member 10, that is, when the operating member 11 rotates to any side around the second rotation axis, it is in the gear state, and when the operating member 11 is located in the middle, it is in the gear-out state. In addition, protrusions and depressions can also be provided on both limit members 13. The specific solution is not significantly different from the above, and will not be repeated, and it should not be understood as exceeding the protection scope of this application.

[0107] The installation method of the aforementioned compression spring 122 is that one end is fixedly connected to the second rotating shaft, and the other end abuts the baffle of the height adjustment 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 adjustment shaft end plate; that is, the compression spring 122 is not sleeved on the second rotating shaft, but is arranged on one side thereof, and can even be inclined, which should fall within the protection scope required by this patent.

[0108] Different from the above-mentioned embodiment, 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 to make the operating member 11 move to one side. The elastic force of the elastic member 12 when the operating member 11 is in the gear state is smaller than the elastic force of the operating member 11 in the disengaged state.

[0109] In one embodiment of the present invention, the shifting member 10 is provided with the shifting groove 102 on only one side, and the lower part of the tension spring 121 is fixed to generate an oblique pulling force on the operating member 11. Fig. 27 At this time, 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 to the in-gear state position.

[0110] Reference Figure 28 to Figure 31As 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 rotates to any side around the second rotating shaft, it is in the gear state; a spring slot 15 perpendicular to the second rotating shaft 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 and the adjustment member 11 are in the gear state. The high-axis end plate 9 is in line, and the tension of the tension spring 121 is the largest; when the operating member 11 deflects 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 fully 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. Fig.31 As an example, Fig.31 For attachment Fig.28 The locally enlarged schematic diagram shows that the connection point between the tension spring 121 and the operating member 11 is the upper connection point, the connection point between the tension spring 121 and the height adjustment shaft end plate 9 is the lower connection point, and 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 of the upper connection point during the entire rotation stroke of the operating member 11, and the trajectory is an arc with the second rotating shaft as the center. The upper wall of the spring slot 15 is the trajectory of the lower connection point; analysis shows that only when the lower connection point is located directly above the second rotating shaft, the upper connection point, the lower connection point, and the second rotating shaft are coplanar, and the stretching amount of the tension spring 121 is the largest at this time, thereby ensuring that when the operating member 11 is deflected to one side, the lower connection belt of the tension spring 121 can slide to the edge on the same side of the spring slot 15, and the deformation amount of the tension spring 121 is the smallest at this time.

[0111] In one embodiment of the utility model, the header lifting device further includes a buffer connected to the frame 1 and the linkage assembly, so as to reduce the pulling force of the header 3 when the user pulls the operating member 11. The buffer 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 and improve the user's comfort.

[0112] As mentioned above, the shifting member 10 in the present invention is provided with shifting slots 102 on both sides, and further, a slideway 101 is provided between the shifting slots 102 on both sides, and the operating member 11 passes through the slideway 101 and can move along the slideway 101 to any shifting slot 102, and at least one shifting slot 102 is not at the same height as any shifting slot 102 on the other side of the slideway 101. Since the size of a single shifting member 10 and the total stroke of the operating member 11 are limited, the provision of shifting slots 102 on both sides can greatly increase the number of shifting slots 102, thereby making the total number of gears of the lawn mower more, that is, the number of mowing heights for users to choose is more, and it is suitable for the needs of more users.

[0113] Reference Fig.23 , Fig.24 , define the movement direction of the operating member 11 when the cutting platform 3 rises as the upper direction, and the side wall of the gear slot 102 in the upper direction is inclined to the upper direction from the direction extending from the gear slot 102 to the direction of the slide 101. When the user pulls the operating member 11 in the upper direction, the operating member 11 and the side wall of the gear slot 102 are abutted. 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.

[0114] The movement direction of the operating member 11 when the cutting platform 3 is lowered is defined as the lower direction. The side wall of the gear slot 102 in the lower direction extending from the gear slot 102 to the slideway 101 is not tilted to point to the lower direction, and the gravity of the cutting platform 3 on the operating member 11 will not produce a tendency for it to move in the direction of the slideway 101. The side wall of the gear slot 102 in the lower direction is tilted from the direction extending from the gear slot 102 to the slideway 101 to point in the opposite direction of the lower direction, that is, the side wall of the gear slot 102 in the lower direction is tilted from the direction extending from the gear slot 102 to the slideway 101 to point in the upper direction. When the vehicle bumps and causes the cutting platform 3 to jump, even if the operating member 11 jumps and is slightly misplaced 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.

[0115] Furthermore, even if the user intentionally releases the operating member 11 manually at the slide 101, with the action of the elastic member 12, the operating member 11 will enter the shifting groove 102 on one side in a very short time, thereby preventing the cutting table 3 from directly falling to the lowest point.

[0116] 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 jump, even if the operating member 11 jumps 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.

[0117] The operating member 11 is provided with a clamping plate 14 that can cooperate with the shifting groove 102 on one side. The width of the shifting groove 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 groove 102 . When the operating member 11 cooperates with the gear slot 102, only the clamping 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 direction 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 knife from the ground after the cutting table 3 is raised and 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 3in (inches). When 11 gear slots 102 are set, the height difference of the cutting table 3 between every two adjacent gear slots 102 is 0.3in. In another embodiment, the number of the gear slots 102 is 13, and the height difference between the header 3 of every two adjacent gear slots 102 is 0.25 in. In another embodiment, the number of the gear slots 102 is 16, and the height difference between the header 3 of every two adjacent gear slots 102 is 0.20 in.

[0118] In this embodiment, the product of the total lifting stroke (in) of the cutting table 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 table 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 enables a lawn mower of a certain size to have a more reasonable mowing height gear, which can meet the mowing height requirements of more users. The larger the curb weight of a lawn mower, the larger the space it occupies, and relatively complex components can be set to achieve more complex technical effects. It should also have more gears and mowing height ranges to meet more working conditions.

[0119] The translation mechanism of the lawn mower of this embodiment includes a front mounting member 88 and a rear mounting plate, both ends of which are hinged to the frame 1 and the cutting table 3. The rear mounting plate is composed of rear mounting plates 7 located on the left and right sides of the frame 1. The front mounting member 88, the frame 1, the rear mounting plate, 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; the linkage mechanism connects the operating member 11 and the rear mounting plate, 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 mounting plate is located outside the left and right edges of the frame 1.

[0120] Reference Figure 3 and Fig.25 , including Fig.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 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 frame 1 that are far away from each other. Fig.25 , that is, H1 is less than or equal to 50mm.

[0121] 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-right direction. Compared with the prior art, attaching it to the outer side can make the distance between the two attachment points larger and more stable in the horizontal 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 for getting on the vehicle when stepping on the lawn mower from the ground; the narrower attachment points 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 the lengths of the two lever arms is small with the attachment point as the rotation point, and the moment of force (lever arm multiplied by equivalent weight) on the outer side may be greater than that on the inner side when stepped on by a heavy user; the wider attachment points in this embodiment increase the difference in the lever arms on both sides, and it is difficult for a heavy user to make the moment of force on the outer side greater than that on the inner side when stepped on, that is, it is difficult for the other side to tilt up.

[0122] 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 plate is set 0-50 mm outside the frame 1 to obtain the above ratio. It is particularly noted that at least one of the mowing motors of the common mower is partially located outside the mounting point, resulting in an increase in the rotational torque outside the mounting point, and the mounting point in this embodiment is moved outward relative to the prior art (refer to the attached Figure 3 ), which not only shortens the outer lever arm, but also allows more of one of the mowing motors to be located within the attachment point, thereby greatly reducing the rotational torque outside the attachment 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.

[0123] In other embodiments, only one side of the rear mounting plate 7 may be arranged outside the frame 1, and the other rear mounting plate 7 may be arranged inside the frame 1. In this case, only one side can effectively increase the rotational torque outside the mounting point, that is, when a user stands on that side of the cutting platform 3, the other side of the cutting platform 3 is prevented from tilting up.

[0124] It is particularly noted that the supporting platform in the attached drawings of the present invention is a seat 2, but the cutting platform lifting device in the above embodiment 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 supporting platform in the present invention 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 the present invention include but are not limited to riding lawn mowers and stand-on lawn mowers.

[0125] In other embodiments of the present invention, the cutting blade at the cutting platform 3 is driven by a mowing motor, and the mower should include a battery pack for supplying power to the cutting platform 3 .

[0126] The utility model is not limited to the above specific implementations. Those skilled in the art can easily understand that there are many alternatives to the mower and cutting table lifting device of the utility model without departing from the principle and scope of the utility model. The protection scope of the utility model shall be based on the content of the claims.

Claims

1. A header lifting device, connecting a frame and a header, wherein the frame comprises two beams extending longitudinally, characterized in that: include: A hitch, 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.

2. The header lifting device according to claim 1, characterized in that: The hanging part comprises a front hanging part and two rear hanging plates, wherein the distance between one of the rear hanging plates 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.

3. The header lifting device according to claim 2, characterized in that: The two ends of the front mounting member and the rear mounting plate are rotatably connected to the vehicle frame and the cutting platform. The front mounting member, the vehicle frame, the rear mounting plate and the cutting platform form a parallelogram structure, so that the cutting platform maintains a constant angle with the vehicle frame when moving.

4. The header lifting device according to claim 2, characterized in that: The ratio of the distance between the two rear mounting plates to the cutting width of the lawn mower is 0.3 to 0.

8.

5. The header lifting device according to claim 4, characterized in that: The ratio of the distance between the two rear mounting plates to the cutting width of the lawn mower is 0.38 to 0.

66.

6. A lawn mower, characterized in that: include: The vehicle frame comprises two vehicle beams extending in the longitudinal direction; A cutting table, which is arranged on the lower side of the frame and is used for cutting grass; A battery pack is arranged on the vehicle frame and is used to supply power to the header; The header lifting device comprises: A hitch, 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.

7. A lawn mower, characterized in that: include: The vehicle frame comprises two vehicle beams extending in the longitudinal direction; A seat, arranged on the frame, for a user to sit on; A cutting table, which is arranged on the lower side of the frame and is used for cutting grass; The header lifting device comprises: A hitch, 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.

8. The lawn mower according to claim 7, characterized in that: The hanging member comprises two rear hanging plates and a front hanging member, wherein one of the rear hanging plates is located at the outer side areas of the two vehicle beams.

9. The lawn mower according to claim 8, characterized in that: The distance between the rear mounting plate and the seat is smaller than the distance between the front mounting member and the seat.

10. A lawn mower, characterized in that: include: The vehicle frame comprises two vehicle beams extending in the longitudinal direction; A cutting table, which is arranged on the lower side of the frame and is used for cutting grass; A battery pack, connected to the frame, for supplying power to the header; The header lifting device comprises: A hitch, 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.

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