Lawn mower and header lifting device

Abstract

The utility model relates to a mower and a header lifting device. The mower comprises a frame, a seat, a header and the header lifting device. The header lifting device comprises a control part, a translation mechanism, a linkage mechanism, a gear part and a clamping part, the gear part is connected to the frame and comprises a sliding way and a gear groove, the control part penetrates through the sliding way, the header cannot move downwards when the control part is matched with the gear groove, and the translation mechanism is connected with the linkage mechanism. And the header cannot move upwards when the control piece is matched with the clamping piece. The header lifting device is provided with the clamping piece capable of limiting the control piece, so that the header cannot move upwards, the situation that the control piece rebounds rapidly due to the fact that the header and the header lifting device fall off accidentally is avoided, and therefore a user is prevented from being injured by the control piece. Particularly, the situation that when a user disassembles the header from the frame, the control piece is not limited by the clamping piece and rebounds rapidly under the action of the buffering piece to hurt the user is avoided.

Description

[Technical Field]

[0001] This utility model relates to the field of garden operation vehicle technology, and in particular to a lawnmower and a cutting platform lifting device. [Background Technology]

[0002] Outdoor landscaping vehicles generally refer to vehicles used for landscaping operations outdoors, mainly including vehicles used for cutting and maintaining lawns in gardens.

[0003] Lawn mowers are among the fastest-growing garden vehicles in recent years. They are equipped with a height-adjustable mower platform containing blades to cut and maintain the grass. Due to differences in user preferences and seasons, lawn mowers typically have multiple mowing height settings. Because the mower platform is quite heavy and difficult to raise and lower manually, a power-assist mechanism is usually included to reduce the user's burden. However, current technology lacks a way to prevent the power-assist mechanism from rapidly rotating the mower platform, which could lead to user injury.

[0004] Therefore, it is indeed necessary to provide a lawnmower and a lifting device for the mower to overcome the shortcomings of the prior art. [Utility Model Content]

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a lawnmower and its cutting platform lifting device that can effectively prevent user injury caused by the rapid operation of the cutting platform lifting mechanism of the power assist component.

[0006] The technical solution adopted by this utility model to solve the problem of the prior art is: a cutting table lifting device, connecting the frame of the lawnmower and the cutting table, comprising:

[0007] Control components;

[0008] A translation mechanism, connecting the cutting table and the vehicle frame, is used to limit the angle between the cutting table and the vehicle frame to remain constant when the cutting table moves.

[0009] A linkage mechanism connects the control element and the translation mechanism; when the control element is pulled by the user, it causes the cutting table to move upward or downward.

[0010] A gear shifting component is connected to the vehicle frame. The gear shifting component includes a slide rail through which the operating component passes and a gear shifting groove. The cutting table cannot move downward when the operating component is engaged with the gear shifting groove.

[0011] A locking component is connected to the vehicle frame, and the cutting table cannot move upward when the operating component is engaged with the locking component.

[0012] A further improvement is that the operating component can cooperate with the locking component when the cutting table is at least close to its lowest point.

[0013] A further improvement is that the locking component is configured on the stop component.

[0014] A further improvement is that the locking component is configured as a hook that restricts the upward movement of the control component when it cooperates with the control component.

[0015] A further improvement is that the control element is provided with a groove for engaging the hook.

[0016] A further improvement is as follows: the control component is equipped with a retaining plate for engaging the gear slot, and the groove is formed in the retaining plate.

[0017] A further improvement is as follows: the linkage mechanism includes an elastic element connected to the operating element, which generates a force on the operating element to move it in the direction of the gear slot.

[0018] A further improvement is that the locking component is configured to at least overcome part of the elastic force exerted by the elastic component on the operating component before it can disengage from the operating component.

[0019] A further improvement is as follows: the cutting platform lifting device also includes a buffer component connecting the frame and the linkage assembly, used to reduce the pulling force required by the user to raise the cutting platform by pulling the control component. The locking component is configured to at least overcome part of the elastic force of the buffer component on the control component before it can disengage from the control component.

[0020] This specification also discloses a lawnmower, comprising:

[0021] Frame;

[0022] A cutting platform, located under the vehicle frame, is used for mowing grass;

[0023] The battery pack, mounted on the chassis, is used to power the cutting table;

[0024] Cutting table lifting device, the cutting table lifting device comprising:

[0025] Control components;

[0026] A translation mechanism, connecting the cutting table and the vehicle frame, is used to limit the angle between the cutting table and the vehicle frame to remain constant when the cutting table moves.

[0027] A linkage mechanism connects the control element and the translation mechanism; when the control element is pulled by the user, it causes the cutting table to move upward or downward.

[0028] A gear shifting component is connected to the vehicle frame. The gear shifting component includes a slide rail through which the operating component passes and a gear shifting groove. The cutting table cannot move downward when the operating component is engaged with the gear shifting groove.

[0029] A locking component is connected to the vehicle frame, and the cutting table cannot move upward when the operating component is engaged with the locking component.

[0030] Compared with the prior art, this specification has the following advantages:

[0031] The header lifting device described in this manual is equipped with a locking mechanism that restricts the operation of the control components, preventing the header from moving upwards. This avoids the control components from rapidly rebounding in the event of an accidental detachment of the header from the lifting device, thus preventing injury to the user from the control components. In particular, it prevents injury to the user when the header is being removed from the frame, as the control components, no longer restrained by the locking mechanism, could rebound rapidly under the action of the buffer. [Image Description]

[0032] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings:

[0033] Figure 1 This is a perspective view of the lawnmower of this utility model;

[0034] Figure 2 yes Figure 1 A perspective view of the central frame and the lifting device of the cutting platform;

[0035] Figure 3 yes Figure 2 Top view of the structure shown;

[0036] Figure 4 yes Figure 2 A three-dimensional view of the structure shown from another perspective;

[0037] Figure 5 yes Figure 2 A partial structural schematic diagram of the cutting table lifting device shown.

[0038] Figure 6 , Figure 7 This is a schematic diagram of the structure of the height adjustment shaft end plate and the control components;

[0039] Figure 8 This is a schematic diagram of the structure of the single-sided limiting block in this utility model;

[0040] Figure 9 This is a schematic diagram of an embodiment of the single-sided limiting block being assembled onto the height adjustment shaft end plate in this utility model;

[0041] Figure 10 This is a schematic diagram of the structure of the double-sided limiting block in this utility model.

[0042] Figure 11 This is a schematic diagram of an embodiment of the present invention in which the double-sided limiting blocks are assembled onto the height adjustment shaft end plate;

[0043] Figure 12 This is a schematic diagram of an embodiment of the single-sided limiting block being assembled into the operating component in this utility model;

[0044] Figure 13 This is a schematic diagram of an embodiment of the double-sided limiting block being assembled into the operating component in this utility model;

[0045] Figure 14 This is a schematic diagram of an embodiment of the use of two single-sided limiting blocks in this utility model;

[0046] Figure 15 , 16 This is a schematic diagram of another embodiment in which the two limiting blocks are used in conjunction;

[0047] Figure 17 , 18 This is a schematic diagram of another embodiment in which the two limiting blocks are used in conjunction;

[0048] Figure 19 , 20 This is a schematic diagram of an embodiment in which two limiting rings are used in conjunction;

[0049] Figure 21 , 22 yes Figure 20 The diagram shows the structure in different states;

[0050] Figure 23 This is a schematic diagram of another embodiment of the limiting member;

[0051] Figure 24 , 25 This is a schematic diagram of another embodiment of the limiting member;

[0052] Figure 26 This is a schematic diagram of another embodiment of the limiting member;

[0053] Figure 27 This is a schematic diagram of an embodiment where a tension spring is used as the elastic element;

[0054] Figure 28 This is a schematic diagram of another embodiment where the elastic element is a tension spring;

[0055] Figure 29 yes Figure 28 Another schematic diagram of the structure shown;

[0056] Figure 30 yes Figure 29 Side view of the structure shown;

[0057] Figure 31 yes Figure 28 A partial schematic diagram of the structure shown, including the trajectory line of the upper connection point;

[0058] Figure 32 This is a schematic diagram of a section of the lifting device for the cutting table with a stop mechanism.

[0059] Figure 33 This is a structural diagram of the gear shift component;

[0060] Figure 34 yes Figure 2 Enlarged schematic diagram of the high-swing arm section;

[0061] Figure 35 This is a schematic diagram of a portion of the cutting platform lifting device in another embodiment;

[0062] Figure 36 yes Figure 35 A partial structural schematic diagram of the cutting table lifting device shown.

[0063] Figure 37 This is a cross-sectional schematic diagram of the quick-release lock stop in one of the embodiments;

[0064] Figure 38 yes Figure 37 A magnified view of a portion of the image;

[0065] Figure 39 This is a schematic diagram of the gear shift component in one of the embodiments;

[0066] Figure 40 This is a schematic diagram of the gear shift component in another embodiment;

[0067] Figure 41 , 42 This is a schematic diagram of the structure of the control component in one embodiment;

[0068] Figure 43 This is a schematic diagram of the gear shift component in one of the embodiments.

[0069] Meaning of the reference numerals in the diagram:

[0070] 1. Chassis; 2. Seat; 3. Cutting table; 4. First pivot; 5. Height adjustment swing arm; 6. Tie rod; 7. Rear mount plate; 8. Front mount; 9. Height adjustment axle end plate; 10. Gear shifter; 101. Slide rail; 102. Gear shifter groove; 103. Centering groove; 1031. Positioning block; 104. Hook; 11. Control component; 12. Elastic component; 121. Tension spring; 122. Compression spring; 13. Limiting component; 131. Limiting block; 1311. Single-sided limiter Positioning block; 1312, Double-sided limiting block; 1313, Concave limiting block; 132, Limiting ring; 1321, Convex limiting ring; 1322, Concave limiting ring; 14, Locking plate; 141, Groove; 15, Spring groove; 16, Quick-release locking element; 161, Lock housing; 162, Racket; 1621, Transition surface; 1622, Abutting surface; 163, Lock cylinder; 164, Pawl; 1641, Pawl head surface; 1642, Pawl side surface; 165, Reset element. [Detailed Implementation]

[0071] The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. For example, terms such as "upper," "lower," "front," and "rear," which indicate orientation or positional relationship, are based solely on the orientation or positional relationship shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They 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 should not be construed as limiting the invention.

[0072] Unless otherwise specified, the terms "set", "connected" and "connected" in this utility model should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. The term "fixed connection" in this utility model should also be broadly interpreted as integrally formed, welded, or connected by other fasteners.

[0073] To further clarify, the term "curved surface" in this utility model should be interpreted broadly, such as a plane or curved surface that is inclined. It should not be limited to a curved surface with a change in curvature (or slope).

[0074] Please see Figure 1 The image shows a lawnmower disclosed in this utility model, including a frame 1, a support platform disposed on the frame 1 for supporting the user, a cutter head 3 disposed on the lower side of the frame 1, and a cutter head lifting device connecting the frame 1 and the cutter head 3.

[0075] The cutting platform lifting device includes: a control component 11 for users to hold and pull, a translation mechanism, a linkage mechanism, and a stop component 10.

[0076] The translation mechanism connects the cutting table 3 and the chassis 1, and is used to ensure that the angle between the cutting table 3 and the chassis 1 remains constant during movement; specifically, refer to the appendix. Figures 1 to 4 The translation mechanism includes a front mount 8 and a rear mount, both hinged to the frame 1 and the cutting platform 3. The rear mount consists of rear mount plates 7 located on the left and right sides of the frame 1. The front mount 8, the frame 1, the rear mount, and the cutting platform 3 form a parallelogram structure, so that the cutting platform 3 maintains a constant angle with the frame 1 when it moves.

[0077] The control element 11 rotates around the first pivot 4 set on the frame 1. The linkage mechanism connects the control element 11 and the translation mechanism (in other embodiments, the linkage mechanism can also connect the control element 11 and the cutting table 3, which is not substantially different and will not be described in detail). When the control element 11 is pulled by the user, it drives the cutting table 3 to move up or down.

[0078] The gear shift member 10 includes a gear shift groove 102 and is connected to the frame 1. When the operating member 11 is engaged with the gear shift groove 102, it cannot drive the cutter 3 to move. It is used to limit the cutter 3 to a specific position so that the lawnmower can maintain a stable cutting height when it is running.

[0079] The linkage mechanism also includes an adjusting shaft end plate 9 and a second rotating shaft. The adjusting shaft end plate 9 is connected to the operating member 11 and the first rotating shaft 4. The operating member 11 rotates synchronously around the first rotating shaft 4 with the adjusting shaft end plate 9. The second rotating shaft is connected to the operating member 11 and the adjusting shaft end plate 9. The operating member 11 can rotate around the second rotating shaft and slide relative to the 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 geared position that engages with the gear slot 102 and a disengaged position that disengages from the gear slot 102.

[0080] Further, see attached document. Figure 6 , Figure 7 The linkage mechanism also includes a limiting member 13 and an elastic member 12. The limiting member 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 limiting member 13. The elastic member 12 is connected to 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 limiting member 13. The curved surface of the limiting member 13 abuts against the operating member 11 and generates a deflection force that deflects the operating member 11 to 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 in the disengaged state.

[0081] The operating component 11 and / or the height adjustment shaft end plate 9 are provided with threaded holes, and the limiting component 13 is provided with mounting holes. The limiting component 13 is fixedly installed by bolts passing through the mounting holes and engaging with the threaded holes of the operating component 11 and / or the height adjustment shaft end plate 9. To save space at the limiting component, internal threads are provided in the threaded holes, and the bolts engage with the threads of the threaded holes to achieve the connection between the two. In other connection methods, it can also be fixed by bolt and nut engagement, or by welding, integral molding, or other methods.

[0082] Reference Appendix Figure 4 , Figure 5 In this embodiment, the linkage mechanism includes a pull rod 6; the two 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 table 3 changes.

[0083] Further, please refer to the appendix again. Figure 4 , Figure 5The linkage mechanism also includes a height adjustment arm 5 connected to the first rotating shaft 4. A pull rod 6 is rotatably connected to the height adjustment arm 5. The height adjustment arm 5 rotates synchronously when the first rotating shaft 4 rotates, and the height adjustment arm 5 can be set to form a fixed angle with the end plate 9 of the height adjustment shaft. In the prior art, the control component 11 is located on the lower right side of the support platform (the support platform in the attached figure is the seat 2 for the user to sit on). The user needs to bend over to hold and operate the control component 11, and pulling the control component 11 requires a large force. Therefore, the prior art solution where the control component 11 is located on the lower right side puts a lot of strain on the user's waist and may cause lumbar muscle injury. In this embodiment, the addition of the height adjustment arm 5 can make the control component 11 not located on the lower side. At this time, the user can operate the control component 11 without bending over, and the operation method is more user-friendly.

[0084] The force overcome by the control element 11 in the direction of the first rotating shaft 4 when it is moved from the geared state to the disengaged state is 3N to 30N. This force is not limited to the magnitude of the driving force of the control element 11, but rather the magnitude of the component of the driving force along the direction of the first rotating shaft 4 is 3N to 30N. If the driving force is parallel to the first rotating shaft 4, then the above component force is equal to the driving force. Generally, 10N is preferred, as this force range is relatively reasonable and the operation is more comfortable.

[0085] One end of the operating member 11 is bent to form a second rotating shaft. The two ends of the elastic member 12 are connected to the second rotating shaft and the height-adjusting end plate 9 to generate an elastic force that drives the operating member 11 to move in the direction of the limiting member 13.

[0086] The height adjustment shaft end plate 9 includes a baffle perpendicular to the second rotating shaft, through which the second rotating shaft passes. An elastic element 12 is sleeved on the second rotating shaft, and both ends of the elastic element 12 are connected to the baffle and the second rotating shaft, respectively.

[0087] Reference Appendix Figure 8 , Figure 9 These are schematic diagrams of the limiting member 13 in the first embodiment and the cooperation state of the limiting member 13 and the operating member 11, respectively. In this embodiment, the limiting member 13 is fixed to the height adjustment shaft end plate 9; as shown... Figure 8 As shown, the limiting member 13 is a single-sided limiting block 1311. The end of the single-sided limiting block 1311 near 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 near the operating member 11 is considered as a protrusion, and the part away from it is considered as a depression. In this embodiment, the elastic member 12 is a compression spring 122. The elastic force applied by the compression spring 122 to the operating member 11 causes it to abut against the single-sided limiting block 1311, and the abutment position is located at the curved surface of the single-sided limiting block 1311. The abutment force of the curved surface on the operating member 11 has a component force pointing towards the depression. Therefore, it can have the tendency to move the operating member 11 around the second rotating axis away from the protrusion until the operating member 11 moves to cooperate with the stop groove 102 and is in the stop state.

[0088] Furthermore, the stop member 10 includes a slide 101 and stop 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 around the second rotating shaft to either side, it enters the stop groove 102 on the corresponding side. That is, the limiting member 13 can make the operating member 11 generate abutting pressure in different directions under different conditions, so that the operating member 11 has the tendency to deflect into the stop groove 102 in different directions when in different positions.

[0089] For details, please refer to the appendix. Figure 10 , Figure 11 The figures show schematic diagrams of the limiting member 13 and the cooperation state between the limiting member 13 and the operating member 11 in the second embodiment. In this embodiment, the limiting member 13 is a double-sided limiting block 1312 fixed to the height adjustment shaft end plate 9. The end of the double-sided limiting block 1312 near the operating member 11 has two curved surfaces along the rotation direction around the second rotating axis, and the two curved surfaces are smoothly transitioned. Similarly, the part of the curved surface near the operating member 11 is considered as a protrusion, and the part away is considered as a depression. In this embodiment, the middle part where the two curved surfaces are close to each other is a protrusion. The two sides are concave; in this embodiment, the elastic element 12 is also a compression spring 122. The spring 122 applies a spring force to the operating element 11, causing it to abut against the double-sided limiting block 1312. The abutting position is located on the curved surface of either side of the double-sided limiting block 1312. The abutting force of the double-sided limiting block 1312 on the operating element 11 has a lateral component force. Therefore, it can have the tendency to move the operating element 11 around the second rotating axis to move away from the central protrusion until the operating element 11 moves to cooperate with the stop groove 102 and is in the stop state.

[0090] Reference Appendix Figure 8 , Figure 12 The figures show schematic diagrams of the limiting member 13 and the engagement state of the limiting member 13 and the height adjustment shaft end plate 9, respectively, in the third embodiment. In this embodiment, the limiting member 13 is a single-sided limiting block 1311 fixed to the operating member 11. The end of the single-sided limiting block 1311 near 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 part of the curved surface near the height adjustment shaft end plate 9 is considered to be protruding, and the part away from it is considered to be concave. The height adjustment shaft end plate 9 is close to the limiting member 1311. A protrusion is provided on one side of block 131; in this embodiment, the elastic element 12 is a compression spring 122. The elastic force applied by the compression spring 122 to the operating member 11 causes the single-sided limiting block 1311 to abut against the protrusion, and the abutting position is located at the curved surface of the single-sided limiting block 1311. The abutting force of the curved surface against the protrusion has a component force pointing towards the recess. The protrusion is subjected to a reaction force and has the tendency to move the operating member 11 around the second rotation axis to move away from the protrusion until the operating member 11 moves to cooperate with the stop groove 102 and is in the stop state.

[0091] Reference Appendix Figure 10 , Figure 13 The figures show schematic diagrams of the limiting member 13 and the engagement state of the limiting member 13 and the height adjustment shaft end plate 9, respectively, in the fourth embodiment. In this embodiment, the limiting member 13 is a double-sided limiting block 1312 fixed to the height adjustment shaft end plate 9. The end of the double-sided limiting block 1312 near the height adjustment shaft end plate 9 has two curved surfaces along the rotation direction around the second axis, and the two curved surfaces are smoothly transitioned. Similarly, the part of the curved surface near the height adjustment shaft end plate 9 is considered to be protruding, and the part away from it is considered to be concave. In this embodiment, the middle part of the two curved surfaces that are close to each other is protruding, and the two sides are concave. Furthermore, a protrusion is provided on the side of the heightening shaft end plate 9 near the limiting block 131; in this embodiment, the elastic element 12 is a compression spring 122. The elastic force applied by the compression spring 122 to the operating member 11 causes the double-sided limiting block 1312 to abut against the protrusion, and the abutting position is located at the curved surface of the double-sided limiting block 1312. The abutting force of the curved surface against the protrusion has a component force pointing towards the recess. The protrusion is subjected to a reaction force and has the tendency to move the operating member 11 around the second rotating axis to move away from the protrusion until the operating member 11 moves to cooperate with the stop groove 102 and is in the stop state.

[0092] In both of the above embodiments one and two, the limiting member 13 and the operating member 11 directly abut against each other. However, the operating member 11 is a rod-shaped structure, and its abutting effect with the limiting member 13 is similar to that of the protrusion abutting against the limiting member 13 in embodiments three and four.

[0093] In the aforementioned embodiments, a limiting member 13 is provided only at the operating member 11 or the height adjustment shaft end plate 9 to produce a resisting effect. In other embodiments, another limiting member 13 may be added to the operating member 11. When the curved surfaces of the two limiting members 13 abut against each other, a force is generated that causes the operating member 11 to deflect, moving the operating member 11 to the blocking state. Specifically:

[0094] Reference Appendix Figure 8 , Figure 14 , Figure 14 This is a schematic diagram of the connection state between the limiting member 13, the height adjustment shaft end plate 9, and the operating member 11 in the fifth embodiment. This embodiment includes two single-sided limiting blocks 1311, which are respectively fixed to the height adjustment shaft end plate 9 and the operating member 11, and the curved ends of the two single-sided limiting blocks 1311 abut against each other. In this embodiment, the elastic member 12 is a compression spring 122. The elastic force applied by the compression spring 122 to the operating member 11 causes the two single-sided limiting blocks 1311 to abut against each other at the curved surface of the single-sided limiting block 1311. The abutting force of the curved surface of the single-sided limiting block 1311 against the other single-sided limiting block 1311 has a component force pointing perpendicular to the second rotating axis, so that the operating member 11 deflects until it engages with the stop groove 102 and is in the stop state.

[0095] Reference Appendix Figure 15 , Figure 16 , Figure 15This is a schematic diagram of the limiting member 13 in the sixth embodiment. Figure 16 This diagram illustrates the connection state of the limiting member 13, the limiting member 13, the height adjustment shaft end plate 9, and the operating member 11 in the sixth embodiment. In this embodiment, the limiting block 131 includes two types: one is a convex limiting block with protrusions (refer to the double-sided limiting block 1312 in the attached diagram), and the other is a concave limiting block 1313 with recesses. The protrusions and recesses of the two limiting blocks 131 can cooperate with each other. The protrusion of the convex limiting block includes curved surfaces on both sides and a vertex located in the middle, while the recess of the concave limiting block 1313 includes curved surfaces on both sides and a concave point located in the middle. The curved surface of the convex limiting block abuts against the concave surface of the concave limiting block 1313, which can generate a force that allows the operating member to... The component force of the deflection of the longitudinal member 11 drives the operating member 11 to deflect to engage with the gear slot 102 and be in the geared state. This embodiment can generate deflection components on both sides. When the curved surface of the convex limiting block abuts against the corresponding side curved surface of the concave limiting block 1313, a force is generated that causes the operating member 11 to deflect in one direction. When the other curved surface of the convex limiting block abuts against the corresponding side curved surface of the concave limiting block 1313, a force is generated that causes the operating member 11 to deflect in the other direction. Thus, when the operating member 11 gets closer to the gear slot 102 on one side, the abutting force generated by the limiting block 131 drives the operating member 11 into the gear slot 102 on the corresponding side.

[0096] Reference Appendix Figure 17 , Figure 18 , Figure 17 This is a schematic diagram illustrating the connection state of the limiting member 13, the limiting member 13, the height adjustment shaft end plate 9, and the operating member 11 in the seventh embodiment. In this embodiment, the limiting block 131 is only one type. The limiting block 131 is a convex limiting block with protrusions as shown in the figure. The protrusions of the convex limiting block include curved surfaces on both sides and a vertex located in the middle. The curved surfaces of the two convex limiting blocks abut against each other, which can generate a component force that causes the operating member 11 to deflect, driving the operating member 11 to engage with the stop groove 102 and be in the stop state. This embodiment can produce The force generated by the limit block 131 deflects the control member 11 in one direction when the curved surface of one convex limit block abuts against the corresponding curved surface of the other convex limit block; when the other curved surface of the convex limit block abuts against the corresponding curved surface of the convex limit block, a force is generated that causes the control member 11 to deflect in the other direction. Thus, when the control member 11 gets closer to the stop groove 102 on one side, the abutting force generated by the limit block 131 drives the control member 11 into the stop groove 102 on the corresponding side.

[0097] Furthermore, in the above embodiments, the limiting member 13 only acts as abutment at a single point at any given time. In other embodiments, the limiting member 13 may be an annular structure, with protrusions and / or recesses symmetrically arranged on the surface of the limiting member 13 to produce an abutment effect, as detailed below:

[0098] Reference Appendix Figures 19 to 22The diagram illustrates the limiting member 13 and the engagement state of the limiting member 13 and the operating member 11 in the eighth embodiment. In this embodiment, the limiting member 13 is a ring-shaped limiting ring 132 with two symmetrically arranged protrusions. The two protrusions on a single limiting ring 132 are vertically symmetrical. When the protrusions of the two limiting rings 132 abut against each other, the operating member 11 is in a disengaged state. At this time, the elastic force of the elastic member 12 causes a lateral abutment force on the two limiting rings 132, thus causing the operating member 11 to tend to move laterally to the engaged state. It should be noted that, referring to the attached diagram... Figure 20 In this state, the protruding tips of the two limiting members 13 abut against each other. Although there is no lateral force, this state is obviously unstable. Even a slight lateral force applied by the user or a slight vibration of the vehicle will cause the operating member 11 to shift and enter the position as described above. Figure 21 or Figure 22 In this state, the operating element 11 deflects into the corresponding side of the stop groove 102. Further, more than two protrusions can be symmetrically arranged on a single limiting ring 132 to achieve the same technical effect; the specific solutions are similar and will not be elaborated here.

[0099] Reference Appendix Figure 23 This is another embodiment of the present specification. The figure shows annular and mutually cooperating limiting rings 132. One limiting ring 132 is located on the height adjustment shaft end plate 9, and the other limiting ring 132 is located on the operating member 11. One of them is a convex limiting ring 1321 with a protrusion, and the other is a concave limiting ring 1322 with a recess. When the protrusion and the recess of the two limiting rings 132 are engaged, the operating member 11 is in the engaged state, and otherwise it is in the disengaged state.

[0100] Reference Appendix Figure 24 , Figure 25 In another embodiment of the present invention, the figure shows two interlocking ring-shaped limiting rings 132. The two limiting rings 132 are located on the height adjustment shaft end plate 9 and the operating member 11, respectively. One limiting ring 132 has a protrusion, and the other limiting ring 132 has a recess, but it differs from the attached... Figure 23 In the embodiment shown, the convex limiting ring has a protrusion on both the upper and lower sides, and the concave limiting ring has two recesses on both the upper and lower sides. This embodiment is applicable to the technical solution of providing a stop groove 102 on both the left and right sides of the aforementioned stop member 10. When the protrusion of the convex limiting ring engages with any one of the recesses, the operating member 11 is in the stop position. 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.

[0101] Reference Appendix Figure 26In another embodiment of the present invention, the figures show two interlocking ring-shaped limiting rings 132. The two limiting rings 132 are located on the height adjustment shaft end plate 9 and the operating member 11, respectively. One limiting ring 132 has a protrusion, and the other limiting ring 132 has a recess, but this differs from the attached... Figure 23 , Figure 24 , Figure 25 In the embodiment shown, the limiting ring 132 has more protrusions and recesses, and the number of recesses on one side is one more than the number of protrusions at the corresponding position. At this time, the two limiting rings 132 have two stable states that cooperate with each other. The corresponding technical solution of setting two rows of left and right stop grooves 102 for the stop member 10 is used. When the two limiting rings 132 are in the state between the two stable states, the operating member 11 is in the disengaged state.

[0102] Additionally, it should be noted that the aforementioned Figure 8 , Figure 9 , Figure 12 , Figure 14 , Figure 15 , Figure 16 , Figure 23 In the illustrated embodiment, the extreme deflection position of the control member 11 remains abutting against the curved surface of the limiting member 13, and only one of the two extreme positions of the control member 11 rotating around the second axis is in a stable state, which corresponds to the control member 11 being in the blocking state. The aforementioned... Figure 11 , Figure 13 , Figure 17 , Figure 18 , Figure 19 , Figure 20 , Figure 21 , Figure 22 , Figure 24 , Figure 25 , Figure 26 In the illustrated embodiment, the two extreme positions of the operating member 11 rotating around the second axis are both in a stable state. This is suitable when the operating member 11 is in the blocking state at both extreme positions. However, it should be noted that the technical solution of the limiting member 13 achieving two stable states is not entirely unapplicable to the single-sided blocking groove 102 solution. It is only necessary to limit the maximum rotation position of the operating member 11 through an external structure to prevent it from rotating out of the blocking position. Figure 21 Exercise to Figure 22 As shown, the specific external structure only needs to set a blocking structure on the height adjustment axle end plate 9, the stop piece 10, or the frame 1 to block the operation piece 11, which will not be elaborated here.

[0103] Furthermore, a specific scheme for ensuring the operating member 11 is in a engaged state when located on both sides is as follows: A stop groove 102 is provided on both sides of the stop member 10, meaning that the operating member 11 is in a engaged state when rotated around the second pivot to either side, and in a disengaged state when located in the middle. Alternatively, protrusions and recesses can be provided on both limiting members 13; the specific scheme is not significantly different from the aforementioned scheme and will not be elaborated further, nor should it be construed as exceeding the scope of protection of this application.

[0104] The aforementioned compression spring 122 is installed with one end fixedly connected to the second rotating shaft and the other end abutting against the baffle of the height adjustment shaft end plate 9. Its installation method and position only need to satisfy the requirement that the second rotating shaft can slide relative to the height adjustment shaft end plate along the axial direction of the second rotating shaft; that is, the compression spring 122 is not sleeved on the second rotating shaft, but is set on one side of it, or even set at an angle, all of which should fall within the protection scope claimed by this patent.

[0105] Unlike the aforementioned embodiments, refer to the appendix. Figures 27 to 31 The elastic element 12 is a tension spring 121 with the control element 11 and the height adjustment shaft end plate 9 connected at both ends respectively. The elastic element 12 generates an oblique pulling force on the control element 11, causing the control element 11 to move to one side. The elastic force of the elastic element 12 when the control element 11 is in the gear state is less than the elastic force of the control element 11 when it is in the disengaged state.

[0106] In one embodiment of the present invention, the stop member 10 is provided with a stop groove 102 on only one side, so that fixing the lower part of the tension spring 121 can generate an oblique pulling force on the operating member 11. (Refer to the attached drawing.) Figure 27 At this time, it should be noted that the lower engagement point of the tension spring 121 (the end of the tension spring 121 near the second rotating shaft) is fixed above the second rotating shaft. From the top view, the lower engagement point is closer to the in-gear position of the control member 11, which can ensure that when the control member 11 is in the disengaged state, it can receive the oblique pulling force of the tension spring 121, thereby causing the control member 11 to move towards the in-gear position.

[0107] Reference Appendix Figures 28 to 31As mentioned above, in order to enable the operating member 11 to be in a stopped state when moving to either side, a stop groove 102 is provided on both sides of the stop member 10, that is, when the operating member 11 rotates around the second rotating shaft to either side, it is in a stopped state; a spring groove 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 groove 15; when the operating member 11 enters the stop groove 102 on either side, the end of the tension spring 121 slides to the corresponding side of the spring groove 15; when the tension spring 121 slides to the middle of the spring groove 15, the operating member 11 is in a stopped state. The high-shaft end plates 9 are collinear, and the tension spring 121 has the maximum tension. 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 groove 15 slides along the groove to the same side until it reaches the end of the groove. At this time, the operating member 11 also completely enters the corresponding stop groove 102 under the action of the tension spring 121. Conversely, when the user holds the operating member 11 to disengage it from the stop groove 102, the movement state of the tension spring 121 is the opposite of the above, and will not be described again. When the user releases the operating member 11, the operating member 11 will automatically enter the stop groove 102 on one side. (See attached image) Figure 31 Example description, with appendix Figure 31 For the appendix Figure 28 The enlarged schematic diagram shows that 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 groove 15 is located on the upper side of the second rotating shaft, meaning the lower connection point is located on the upper side of the second rotating shaft. The arc a in the diagram is the trajectory line of the upper connection point during the entire rotation stroke of the operating member 11. This trajectory line is an arc with the second rotating shaft as the center. The upper wall of the spring groove 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 is the upper connection point, the lower connection point, and the second rotating shaft coplanar. At this time, the tension of the tension spring 121 is the largest, thus ensuring that when the operating member 11 is deflected to one side, the lower connection of the tension spring 121 can slide to the same side edge of the spring groove 15. At this time, the deformation of the tension spring 121 is the smallest.

[0108] In one embodiment of this specification, the cutting platform lifting device further includes a buffer connecting the frame 1 and the linkage assembly to reduce the pulling force required by the user to pull the control element 11 to raise the cutting platform 3. The buffer includes a tension spring with both ends connected to the frame 1 and the height adjustment axle end plate 9, or a torsion spring with both ends connected to the frame 1 and the first rotating shaft 4; the tension spring or torsion spring here can reduce the burden on the user to pull the control element 11 and improve user comfort.

[0109] As previously stated, the shifting component 10 in this specification has shifting grooves 102 on both sides. Furthermore, a slide rail 101 is provided between the shifting grooves 102 on both sides. The operating component 11 passes through the slide rail 101 and can move along the slide rail 101 to either shifting groove 102. At least one shifting groove 102 is not at the same height as any shifting groove 102 on the other side of the slide rail 101. Since the size of a single shifting component 10 and the total stroke of the operating component 11 are limited, providing shifting grooves 102 on both sides can significantly increase the number of shifting grooves 102, thereby increasing the total number of shifting heights of the lawnmower, i.e., providing more mowing heights for users to choose from, thus catering to the needs of more users.

[0110] Reference Appendix Figure 23 , Figure 24 The direction of movement of the control member 11 when the cutting table 3 rises is defined as the upper direction. The side wall of the stop groove 102 in the upper direction is inclined in the direction of the extension from the stop groove 102 to the slide 101. When the user pulls the control member 11 in the upper direction, the control member 11 abuts against the side wall of the stop groove 102. The direction of the side wall allows the side wall to guide the control member 11 laterally to the slide 101. That is, the user only needs to pull the control member 11 in the upper direction, and the control member 11 can be easily moved out of the stop groove 102 without deliberately pulling the control member 11 laterally, which simplifies the user operation.

[0111] When the cutting platform 3 descends, the direction of movement of the operating component 11 is defined as the lower direction. The side wall of the stop groove 102 in the lower direction extends from the stop groove 102 towards the slide rail 101 without tilting towards the lower direction. The gravity of the cutting platform 3 exerts a pulling force on the operating component 11, which will not cause it to move towards the slide rail 101. The side wall of the stop groove 102 in the lower direction tilts towards the opposite direction of the lower direction, that is, the side wall of the stop groove 102 in the lower direction tilts towards the upper direction. When the vehicle bumps and causes the cutting platform 3 to jump, even if the control component 11 jumps and is slightly displaced in the gear slot 102, the side wall direction of the gear slot 102 will cause the control component 11 to return to the side of the gear slot 102 away from the slide rail 101 under the gravity of the cutting platform 3, ensuring that the control component 11 will not leave the original gear slot 102, that is, to keep the cutting platform 3 height stable.

[0112] Furthermore, even if the user intentionally releases the control component 11 manually at the slide 101, the control component 11 will enter the stop groove 102 on one side in a very short time, in conjunction with the action of the elastic component 12, thus preventing the cutting table 3 from falling directly to the lowest point.

[0113] When the control element 11 is not fully engaged with the gear slot 102, the height of the cutting platform 3 off the ground is greater than when the control element 11 is fully engaged with the same gear slot 102. That is, when the control element 11 is not fully engaged with the gear slot 102, the weight of the cutting platform 3 will cause the control element 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 control element 11 jumps and is slightly displaced in the gear slot 102 to a state of not being fully engaged, the gravity of the cutting platform 3 will cause the control element 11 to gradually slide until it is fully engaged with the gear slot 102.

[0114] The control member 11 is provided with a retaining plate 14 that can cooperate with the gear slot 102 on one side. The width of the gear slot 102 is greater than the thickness of the retaining plate 14 and less than the dimension of the control member 11 along the width direction of the gear slot 102. When the control element 11 engages with the gear slot 102, only the locking plate 14 on the control element 11 extends into the gear slot 102. Therefore, the size of a single gear slot 102 along the slide 101 direction can be reduced. That is, within the same size range, more gear slots 102 can be set, thereby increasing the total number of gears on the lawnmower. The height of the cutter blade off the ground after the cutter head 3 is raised and lowered is the cutting height. Therefore, more cutting heights are available for users to choose from, which is suitable for the needs of more users. In the prior art, the gear slots 102 of lawnmowers are mostly set to 5 to 8. In this embodiment, the gear slots 102 can have a larger setting range, so they can be set to more than 10. In this embodiment, the total lifting stroke of the cutter head 3 (the height difference between the highest and lowest points) is 3 inches. When 11 gear slots 102 are set, the height difference of the cutter head 3 between every two adjacent gear slots 102 is 0.3 inches. In another embodiment, the number of stop slots 102 is 13, and the height difference of the cutting platform 3 between any two adjacent stop slots 102 is 0.25 in. In another embodiment, the number of stop slots 102 is 16, and the height difference of the cutting platform 3 between any two adjacent stop slots 102 is 0.20 in.

[0115] In this embodiment, the product of the total lifting stroke (in) of the cutting platform 3, the number of stop slots 102, and the curb weight (kg) of the lawnmower is greater than 1×10. 3 Less than or equal to 6 × 10 4 (in·Kg). In another embodiment, the product of the total lifting stroke (in) of the cutter head 3, the number of stop slots 102, and the curb weight (Kg) of the lawnmower is greater than 6×10 3 Less than or equal to 2.4 × 10 4(in kg). A relatively reasonable numerical range allows a lawnmower of a certain size to have more reasonable mowing height settings, meeting the mowing height needs of more users. The greater the curb weight of the lawnmower, the more space it occupies, allowing for the installation of more complex components to achieve more complex technical effects. It should also have more settings and a wider mowing height range to meet more working conditions.

[0116] The translational mechanism of the lawnmower in this embodiment includes a front attachment 8 and a rear attachment, both hinged to the frame 1 and the cutter head 3. The rear attachment consists of rear attachment plates 7 located on the left and right sides of the frame 1. The front attachment 8, the frame 1, the rear attachment, and the cutter head 3 form a parallelogram structure, so that the cutter head 3 maintains a constant angle with the frame 1 when it moves. The linkage mechanism connects the operating member 11 and the rear attachment. The operating member 11 rotates around the first pivot 4 to drive the cutter head 3 to move upward or downward. The rear attachment is located outside the left and right edges of the frame 1.

[0117] Reference Appendix Figure 3 and Figure 25 , including Figure 25 This is an enlarged schematic diagram of the tie 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-right direction ranges from 0 to 50 mm. The main structure of the frame 1 includes two longitudinally extending beams. The rear mounting plate 7 is located outside the left-right edges of the frame 1, that is, outside the area of ​​the mutually distant side walls. (See attached diagram.) Figure 25 That is, H1 is less than or equal to 50mm.

[0118] In the prior art, the attachment points of the cutter 3 are all located on the inner side of the frame 1 in the left-right direction. Compared with the prior art, attaching to the outer side allows for a larger distance between the two attachment points, resulting in greater lateral stability. Since the cutter 3 is wider than the frame 1, users may occasionally use the cutter 3 as a step when stepping onto the lawnmower from the ground. The narrower attachment points in the prior art may cause the other side of the cutter 3 to lift up when stepped on by the user. This is because the difference in the length of the two lever arms is small with the attachment point as the rotation point, and a heavier user stepping on the cutter may cause the torque (lever arm multiplied by the equivalent weight) on the outer side to be greater than that on the inner side. In this embodiment, the wider attachment points increase the difference in the lever arms on both sides, making it difficult for a heavier user to cause the torque on the outer side to be greater than that on the inner side, thus making it difficult for the other side to lift up.

[0119] Specifically, the ratio of the distance between the two rear mounting plates 7 to the cutting width of the lawnmower is 0.3 to 0.8. In other embodiments, the ratio of the distance between the two rear mounting plates 7 to the cutting width of the lawnmower can also be set to 0.38 to 0.66. The width of the frame 1 is approximately 500 to 600 mm, and the standard cutting width of the cutter 3 is 42 inches or 54 inches. By placing the rear mounting pieces 0 to 50 mm outside the frame 1, the above ratio can be obtained. It should be noted that in common lawnmowers, at least one of the mowing motors is partially located outside the mounting point, resulting in increased rotational torque outside the mounting point. In this embodiment, the mounting point is moved outward relative to the prior art (see attached figure). Figure 3 This not only shortens the outer lever arm, but also places more of one of the mowing motors inside the attachment point, thereby significantly reducing the rotational torque outside the attachment point, making the mower 3 more stable and greatly reducing the problem of the other side of the mower 3 tilting up due to user stepping.

[0120] In other embodiments, only one rear mounting plate 7 may be set in the area outside the frame 1, and the other rear mounting plate 7 may be set in the 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 table 3, the other side of the cutting table 3 is prevented from tilting up.

[0121] One embodiment of this specification also discloses a cutter head lifting device, which is connected to the frame of the lawnmower and the cutter head, for adjusting the height of the cutter head.

[0122] The cutting platform lifting device includes an operating component 11, a translation mechanism, and a linkage mechanism. The translation mechanism connects the cutting platform 3 to the vehicle frame 1, and is used to ensure that the angle between the cutting platform 3 and the vehicle frame 1 remains constant during the movement of the cutting platform 3, that is, the cutting platform 3 maintains approximately the same angle relationship with the ground during the lifting process. The linkage mechanism connects the operating component 11 to the translation mechanism, and when the operating component 11 moves, it drives the cutting platform 3 to move upward or downward.

[0123] The linkage mechanism includes a first rotating shaft 4 and a quick-release locking element 16. As mentioned above, the operating element 11 rotates around the first rotating shaft 4 disposed on the frame 1. The linkage mechanism connects the operating element 11 with the translation mechanism. When the operating element 11 is pulled by the user, it drives the first rotating shaft 4 to rotate and the cutting table 3 to move upward or downward. In this embodiment, the rotation direction of the first rotating shaft 4 is defined as follows: the direction of rotation of the first rotating shaft 4 when the cutting table 3 moves upward is the positive direction, and the direction of rotation of the first rotating shaft 4 when the cutting table 3 moves downward is the negative direction.

[0124] The quick-release locking stop 16 connects 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 operating conditions, the cutter head 3 will only rise and fall slowly. However, if there is a component failure or other situation, the cutter head 3 may rise or fall rapidly. In minor cases, this may cause the cutter head lifting device to bear excessive impact force and reduce its service life. In severe cases, it may even cause injury to the user. Therefore, this embodiment discloses that a quick-release locking stop 16 is provided on the first rotating shaft 4 to limit the rotation speed of the first rotating shaft 4. When the height of the cutter head 3 changes rapidly, the rotation of the first rotating shaft 4 is restricted, so as to prevent the first rotating shaft 4 from continuing to rotate and causing the height of the cutter head 3 to continue to change, resulting in more serious consequences.

[0125] In some optional embodiments, the first rotational speed is 0.1 rpm, meaning that the height of the cutting table 3 is limited to change when the rotational speed of the first rotating shaft 4 is greater than 0.1 rpm. In other optional embodiments, the first rotational speed is 0.2 rpm, 0.3 rpm, or 1 rpm.

[0126] It should be noted that the quick-release locking device 16 connecting the frame 1 and the first pivot 4 does not limit the quick-release locking device 16 to be directly connected to the frame 1 and the first pivot 4; they may be indirectly connected through other components.

[0127] In one embodiment of this specification, the cutting platform lifting device further includes a buffer connecting the frame 1 and the linkage assembly, which reduces the pulling force required to raise the cutting platform 3 by pulling the control component 11. Especially in usage scenarios where the user needs to manually pull the cutting platform 3 to raise or lower it, the buffer can effectively reduce the force required for the user to pull the control component 11.

[0128] In some optional embodiments, the buffer includes a tension spring that connects to the frame 1 and the height adjustment axle end plate 9 at both ends, or a torsion spring that connects to the frame 1 and the first pivot 4 at both ends; the tension spring or torsion spring here can reduce the burden on the user when pulling the control element 11 and improve the user's comfort.

[0129] For example: In the lawnmower industry, the common height adjustment range of the mower head 3 is approximately 3 to 4.5 inches, and the lowest point of the height adjustment range is approximately 1 to 1.5 inches above the ground. Considering the need for a margin in the mechanical structure of the mower head 3, 7 inches is used here as the calculated data for the maximum height above the ground of the mower head 3. If the aforementioned buffer part is disconnected from the mower head 3, the mower head 3 will fall rapidly downwards. When the mower head 3 falls from its maximum height above the ground, it is mainly affected by gravity, and its falling process is inevitably affected by a certain amount of resistance. Calculations show that its falling process is slightly less than 0.19 seconds, and its instantaneous landing speed is approximately 1.9 m / s. During the raising and lowering of the mower head in the lawnmower industry, the total rotational stroke of the control lever 11 is approximately 40° around the first rotating shaft 4, which is approximately 0.11 revolutions 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.

[0130] Reference Appendix Figure 35 The rotational speed of the first rotating shaft 4 is related not only to the vertical movement speed of the cutting platform 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 10cm. During the lifting and lowering process of the cutting platform, the height adjustment arm 5 rotates within a range of ±20° relative to the horizontal direction. Calculations show that the rotational speed at the moment of landing is approximately 3.2 r / s (revolutions per second).

[0131] As described above, the quick-release locking mechanism should lock the first rotating shaft 4 before its rotational speed reaches 3.2 r / s. However, in reality, if the quick-release locking effect is only generated when that speed is reached, the desired effect cannot be achieved. Therefore, the quick-release locking mechanism should generate the locking effect at the initial stage when the first rotating shaft 4 begins to rotate rapidly, that is, at the initial stage when the cutting platform 3 begins to fall. Therefore, it is advisable to set the quick-release locking device at a speed lower than the aforementioned average rotational speed of the first rotating shaft, such as 0.1 r / s, 0.2 r / s, or 0.3 r / s.

[0132] Meanwhile, considering that its quick-release locking mechanism should not affect the user's normal operation, that is, it should not be too sensitive to be triggered when the user adjusts the height of the cutting table. The adjustment time for normal operation by the user is often 1 to 2 seconds, during which the rotation angle of the first rotating shaft 4 is 5°, and its speed is significantly less than the aforementioned 0.1 r / s. Therefore, in this embodiment, the first speed is set to 0.1 rpm. That is, when the speed of the first rotating shaft 4 is greater than 0.1 r / s, the quick-release locking component 16 is triggered to lock the first rotating shaft 4, preventing the rapid movement of the operating component or a component of the cutting table lifting device from causing injury to the user.

[0133] In one of the more specific embodiments, the quick-release locking member 16 includes a lock housing 161, a lock cylinder 163, a lock tongue, and a reset member 165. The lock housing 161 is disposed on the frame 1, the lock cylinder 163 is disposed on the first rotating shaft 4, the lock tongue is movably connected to one of the lock housing 161 and the lock cylinder 163, and the reset member 165 is connected to the lock tongue.

[0134] In some optional embodiments, the reset member 165 restricts the first rotating shaft 4 from rotating at a speed less than a first speed, so that the bolt does not abut against the other of the lock housing 161 and the lock cylinder 163; when the first rotating shaft 4 rotates at a speed greater than the first speed, the bolt abuts against the other of the lock housing 161 and the lock cylinder 163, so that the first rotating shaft 4 cannot rotate.

[0135] As described above, the quick-release locking member 16 can lock the first rotating shaft 4 when its rotational speed is greater than a set first rotational speed. In some optional embodiments, the quick-release locking member 16 only engages with the lock shell 161 and the lock cylinder 163 when the first rotating shaft 4 rotates forward at a speed greater than the first rotational speed, 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 engage with the lock shell 161 and the lock cylinder 163, and the first rotating shaft 4 can continue to rotate.

[0136] In one more specific embodiment, the lock housing 161 is provided with an abutment portion, and the locking tongue moves and abuts against the abutment portion when the speed of the first rotating shaft 4 is greater than a first rotational speed. This achieves the technical effect of locking the first rotating shaft 4.

[0137] In one more specific embodiment, the latch, when abutting against the other of the lock housing 161 and lock cylinder 163, experiences a resistance force that causes the latch to tend to move closer to the other of the lock housing 161 and lock cylinder 163. That is, as soon as the latch begins to be abutted, the resulting resistance force makes the abutment between the two increasingly tighter, preventing overall vibration from causing them to disengage, thus making its locking effect on the first pivot 4 more reliable.

[0138] In some more specific embodiments, reference is made to the appendix. Figure 35 The figure shows a quick-release locking element 16 configured on the first pivot 4, see attached figure. Figure 36 The figure shows an enlarged schematic diagram of the linkage mechanism. (See attached diagram.) Figure 37The figure shows a cross-sectional schematic diagram of the quick-release locking member 16. The lock housing 161 is fixed to the frame 1, and the lock cylinder 163 is fixed to the first rotating shaft 4. A portion of the lock housing 161 has an annular structure, and its annular inner wall is provided with ratchet teeth 162 protruding from the surface; in this embodiment, the lock tongue is configured as a pawl 164, one end of which is rotatably connected to the lock cylinder 163, and the aforementioned reset member 165 is provided at the pawl 164 to prevent the first rotating shaft 4 from contacting the aforementioned ratchet teeth 162 when it is stationary.

[0139] Continue to refer to the appendix Figure 37 When the first rotating shaft 4 rotates, the pawl 164 will be subjected to centrifugal force, causing it to tend to move outward away from the first rotating shaft 4. However, in this embodiment, a reset member 165 is provided to limit the movement of the pawl 164. When the rotational speed of the first rotating shaft 4 is less than the first rotational speed mentioned above, the centrifugal force on the pawl 164 cannot effectively overcome the force exerted by the reset member 165 on the pawl 164, thus preventing the pawl 164 from making significant movement 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 on the pawl 164 is greater and can overcome the force exerted by the reset member 165 on the pawl 164, causing the pawl 164 to rotate and contact the lock housing 161.

[0140] Continue to refer to the appendix Figure 37 and attached Figure 38 , attached Figure 38 For the appendix Figure 37 A partially enlarged schematic diagram is shown. The lock housing 161 shown in the figure has a ratchet 162, which has an abutment surface 1622 for abutting and restricting the pawl 164. The pawl 164 has a claw head surface 1641 for abutting 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 it rotates counterclockwise, the pawl 164 is subjected to centrifugal force and rotates relative to the lock cylinder 163 until the claw head surface 1641 of the pawl 164 abuts the abutment surface 1622 of the ratchet 162, thereby preventing the first rotating shaft 4 from continuing to rotate.

[0141] Please refer to the appendix again. Figure 38 As shown in the figure, the ratchet 162 has a generally smooth transition surface 1621, and the pawl 164 has a generally smooth pawl side surface 1642. As described above, when the rotational speed of the first rotating shaft 4 is greater than the first rotational speed and it rotates clockwise, the pawl 164 rotates relative to the lock cylinder 163 under the action of centrifugal force. When the pawl 164 contacts the ratchet 162 under the action of centrifugal force, the pawl side surface 1642 of the pawl 164 contacts the transition surface 1621 of the ratchet 162, and the contact between the two does not have a significant limiting effect on the rotation of the first rotating shaft 4. That is, at this time, the quick-release locking member 16 does not restrict the rotation of the first rotating shaft 4.

[0142] It should be noted that in some embodiments, without external force intervention, after the pawl 164 engages with the ratchet 162 to lock the first rotating shaft 4, it will remain in this locked state. When the user needs to release this locking state, simply pull the lever 11 to reverse the first rotating shaft 4 until the pawl 164 disengages from the ratchet 162. The pawl 164 will then return to its initial position under the action of the reset member 165, thus releasing the locking effect on the first rotating shaft 4. It should be further noted that if the user directly releases the lever 11 at this time, the first rotating shaft 4 may still rotate rapidly again and be locked again by the quick-release locking member 16.

[0143] In some optional embodiments, the quick-release locking element 16 is disposed on the first rotating shaft 4. When the cutting platform 3 rises, the first rotating shaft 4 rotates clockwise; conversely, when the cutting platform 3 falls, the first rotating shaft 4 rotates counterclockwise. If a component in the cutting platform lifting device malfunctions, the cutting platform 3 may fall rapidly downwards. The first rotating shaft 4 will then rotate rapidly counterclockwise, and the quick-release locking element 16 will brake the first rotating shaft 4, preventing the cutting platform 3 from continuing to fall, thus preventing the cutting platform 3 from falling directly to the ground and injuring users.

[0144] In some optional embodiments, the quick-release locking element 16 is disposed on the first rotating shaft 4. When the cutting platform 3 descends, the first rotating shaft 4 rotates clockwise; conversely, when the cutting platform 3 rises, the first rotating shaft 4 rotates counterclockwise. If a component in the cutting platform lifting device malfunctions, it may cause the first rotating shaft 4 to rotate rapidly counterclockwise. For example, if the connection between the first rotating shaft 4 and the cutting platform 3 is broken, the first rotating shaft 4 will rotate rapidly counterclockwise under the action of the buffer. The quick-release locking element 16 will then brake the first rotating shaft 4, preventing the operating element 11 from rapidly springing upwards and causing injury to the user.

[0145] In some optional embodiments, the cutting platform lifting device is equipped with at least two quick-release locking elements 16. One quick-release locking element 16 restricts the first rotating shaft 4 from continuing to rotate when it rotates forward at a speed greater than a first rotational speed, and the other quick-release locking element 16 restricts the first rotating shaft 4 from continuing to rotate when it rotates backward at a speed greater than the first rotational speed. In this embodiment, as long as the rotational speed of the first rotating shaft 4 is greater than the first rotational speed, regardless of whether it rotates forward or backward, at least one quick-release locking element 16 will brake the first rotating shaft 4 to prevent injury to the user.

[0146] In some optional embodiments, two sets of ratchet teeth 162 and pawls 164 are configured in a quick-release locking member 16. The two sets of ratchet teeth 162 and pawls 164 are mirror-symmetrically arranged, meaning that one set of ratchet teeth 162 and pawls 164 can restrict the rapid forward rotation of the first rotating shaft 4, while the other set of ratchet teeth 162 and pawls 164 can restrict the rapid reverse rotation of the first rotating shaft 4. This effectively ensures that when the rotational speed of the first rotating shaft 4 in either the forward or reverse direction exceeds a first rotational speed, the single quick-release locking member 16 brakes the first rotating shaft 4, preventing damage to the user.

[0147] 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. (Refer again to the appendix...) Figure 37 and attached Figure 38 The reset element 165 shown in the figure is configured as a tension spring with pawl 164 and lock cylinder 163 connected at both ends respectively.

[0148] In another alternative embodiment, the pawl 164 is rotatably connected to the lock cylinder 163 at its center. The reset member 165 is configured to connect one end of the pawl 164 and the compression spring of the lock cylinder 163. The centrifugal force experienced by the other end of the pawl 164 when the first rotating shaft 4 rotates is greater than that experienced by the end connected to the compression spring. Therefore, when the rotational speed of the first rotating shaft 4 is high, the centrifugal force of the pawl 164 will compress the compression spring until the pawl 164 contacts the ratchet tooth 162.

[0149] In another alternative embodiment, the reset member 165 is configured as a magnetic component capable of generating magnetic repulsion or attraction on the latch. When the rotational speed of the first rotating shaft 4 is high, the centrifugal force of the pawl 164 overcomes the magnetic force until it contacts the ratchet 162.

[0150] In summary, the above embodiments disclose a cutting platform lifting device and a quick-release locking member 16 applied to the cutting platform lifting device. When abnormal movement of the cutting platform 3 lifting mechanism causes the first rotating shaft 4 to rotate too fast, it has a limiting effect on it. Especially when the cutting platform 3 falls rapidly or the control lever rebounds rapidly, it locks the first rotating shaft 4 to prevent injury to the user. For example, when the user removes the cutting platform 3 from the 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 run rapidly under the action of the buffer. The quick-release locking member 16 can lock the first rotating shaft 4, preventing the cutting platform lifting device from continuing to run rapidly and causing greater damage. Especially for components such as the control member 11 that are easily in direct contact with the user, rapid movement could cause injury to the user; therefore, the quick-release locking member 16 can prevent injury to the user by locking the first rotating shaft 4.

[0151] One embodiment of this specification also discloses a lawnmower, which includes a frame 1, a cutter head 3, a battery pack, a cutter head lifting device, etc., as described above, wherein the battery pack is detachably mounted on the frame 1. The cutter head lifting device includes a first rotating shaft 4 and a quick-release locking device 16. The first rotating shaft 4 rotates in the forward direction when the cutter head 3 moves upward. The quick-release locking device 16 connects the frame 1 and the first rotating shaft 4, and restricts the first rotating shaft 4 from continuing to rotate when the rotational speed of the first rotating shaft 4 is greater than a first rotational speed of 0.5 rpm.

[0152] In one embodiment of this specification, a cutting table lifting device is also disclosed, which is connected to the frame 1 of the lawnmower and the cutting table 3, and is used to adjust the height of the cutting table 3.

[0153] The cutting platform lifting device includes an operating element 11, a translation mechanism, a linkage mechanism, a stop element 10, and a centering section. Specifically, the translation mechanism connects the cutting platform 3 to the frame 1, and is used to limit the angle between the cutting platform 3 and the frame 1 to remain constant when the cutting platform 3 moves; the linkage mechanism connects the operating element 11 to the translation mechanism, and when the operating element 11 is pulled by the user, it drives the cutting platform 3 to move upward or downward; the stop element 10 is connected to the frame 1, and the stop element 10 includes a slide rail 101 passing through the operating element 11 and stop grooves 102 located on both sides of the slide rail 101, and the operating element 11 cannot drive the cutting platform 3 to move when it is engaged with the stop grooves 102; the operating element 11 has a first position when engaged with the centering section, and the distance between the operating element 11 in the first position and the stop grooves 102 on both sides is equal.

[0154] As described above, in some optional embodiments, the stop member 10 is provided with stop grooves 102 on both sides, that is, when the operating member 11 is engaged with the stop groove 102 on either side, the height of the cutting table 3 is a fixed value.

[0155] In some optional embodiments, the linkage mechanism includes a second rotating shaft and an elastic element 12. When the operating element 11 moves around the second rotating shaft, it moves towards one side of the stop groove 102. Further, when the operating element 11 rotates forward around the second rotating shaft, it moves towards the first side stop groove 102; when the operating element 11 rotates backward around the second rotating shaft, it moves towards the second side stop groove 102.

[0156] As described above, the elastic element 12 is connected to the operating element 11. When the operating element 11 is closer to one of the stop slots 102, the elastic element 12 drives the operating element 11 to move towards the stop slot 102 that is closer. However, when the operating element 11 is located in the middle position of the two stop slots 102, the elastic element 12 does not exert any force on the operating element 11 towards either stop slot 102.

[0157] In some optional embodiments, the cutting table 3 moves upward or downward when the operating member 11 moves along the slide 101 of the stop member; the cutting table 3 is located at the highest point of its vertical movement when the operating member 11 engages with the centering part. (See attached figure) Figure 39 In this embodiment, the centering part is configured as a centering groove 103 located at the top of the slide 101. The centering groove 103 can cooperate with the operating member 11, and the operating member 11 cannot move to either side of the stop groove 102 when it is engaged with the centering groove.

[0158] In some optional embodiments, the actuating member 11 is at least partially cylindrical, and the centering portion is configured as a centering groove 103 formed in the stop member 10 and capable of engaging with the cylindrical structure of the actuating member 11. The cylindrical structure of the actuating member 11 makes it easier to disengage from the centering groove 103.

[0159] In some optional embodiments, at least a portion of the actuating element 11 located in the first position is aligned with the projection of the second rotating axis onto the ground. (See attached diagram.) Figure 39 The figure does not show the control member 11 in the first position state, but the centering groove 103 shown in the figure and the projection of the second rotating shaft on the ground are on the same straight line. Therefore, at least a part of the control member 11 in the first position state must be on the same straight line as the projection of the second rotating shaft on the ground.

[0160] In some optional embodiments, reference is made to the appendix. Figure 40 The centering portion is configured as a positioning block detachably connected to the stop member 10. When the positioning block is engaged with the stop member 10, it cannot move along the movement direction 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 located in a first position. That is, in this embodiment, the centering portion is not fixed to the stop plate.

[0161] In some optional embodiments, reference is made to the appendix. Figure 40 The cutting table 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 it is engaged with the centering part. That is, at this time, the user does not need to hold the position of the operating member 11 by hand.

[0162] As described above, in some embodiments of this specification, the cutting table lifting device includes a centering portion for confining the operating member 11 to the middle position of the two side stop slots 102. During the assembly of the cutting table lifting device, by confining the operating member 11 to the centering portion and installing and verifying the position of the limiting member 13, the technical problem that the elastic member 12 cannot correctly exert bias pressure on the stop slots 102 when the operating member 11 is slightly offset from the middle position of the two side stop slots 102 due to the assembly misalignment of the limiting member 13 is avoided. The user can also verify whether the cutting table lifting device is working properly by pulling the operating member 11 to the first position and feeling whether the operating member 11 is subjected to the lateral thrust generated by the elastic member.

[0163] One embodiment of this specification also discloses a lawnmower, which includes a frame 1, a cutter head 3, a battery pack, a cutter head lifting device, etc., as described above, wherein the battery pack is detachably mounted on the frame 1. The cutter head lifting device includes a stop member 10 and a centering part. The stop member 10 is connected to the frame 1, and the stop member 10 includes a slide 101 through which an operating member 11 passes and stop grooves 102 located on both sides of the slide 101; the operating member 11 has a first position when engaging with the centering part, and the distance between the operating member 11 in the first position and the stop grooves 102 on both sides is equal.

[0164] An embodiment of this specification also discloses a cutting table lifting device, which connects the frame 1 of the lawnmower and the cutting table 3, for adjusting the height of the cutting table 3.

[0165] The cutting platform lifting device includes an operating element 11, a translation mechanism, a linkage mechanism, a stop element 10, and a locking element. Specifically, the translation mechanism connects the cutting platform 3 to the frame 1, and is used to limit the angle between the cutting platform 3 and the frame 1 to remain constant when the cutting platform 3 moves; the linkage mechanism connects the operating element 11 to the translation mechanism, and the operating element 11 drives the cutting platform 3 to move upward or downward when pulled by the user; the stop element 10 is connected to the frame 1, and the stop element 10 includes a slide rail 101 passing through the operating element 11 and stop grooves 102 located on both sides of the slide rail 101, and the operating element 11 cannot drive the cutting platform 3 to move when it is engaged with the stop grooves 102; the locking element is connected to the frame 1, and the cutting platform 3 cannot move upward when the operating element 11 is engaged with the locking element.

[0166] The cutting platform 3 has a relatively large mass. In order to reduce the force required to pull the operating member 11 to raise the cutting platform 3, the aforementioned buffer is generally provided. However, after the cutting platform lifting device is disengaged from the cutting platform 3, if the operating member 11 is not limited, the buffer may cause the operating member 11 to move rapidly and cause injury to the user. Therefore, this embodiment provides a locking member for limiting the operating member 11.

[0167] In some optional embodiments, the control element 11 can engage with the locking element when the cutter 3 is at least close to its lowest point. The primary scenario for detaching the cutter 3 from the lawnmower is for maintenance or disassembly, and in this scenario, the cutter 3 is typically lowered to its lowest point first. However, after disconnecting the cutter 3 from the lawnmower body, the control element 11 has its maximum travel. If the locking element is not used to limit the control element 11 at this point, it may cause more significant injury to the user. Furthermore, limiting the control element 11 to this lowest point also reduces the amount of work required when reinstalling the cutter 3 onto the lawnmower body.

[0168] In some optional embodiments, the locking element is disposed on the stop element 10, which is relatively close to the outside of the lawnmower and can be directly seen by the user. This allows the user to directly judge the height of the cutter 3 by observing the engagement state between the control element 11 and the stop element 10. Similarly, the user can also judge the engagement state by observing the position of the control lever and the locking element, which helps determine whether the control lever will quickly spring up and cause injury to the user after the cutter 3 is detached from the lawnmower body. That is, when the user needs to remove the cutter 3 from the lawnmower body, they should actively control the control lever to engage with the locking element at the stop element 10.

[0169] In another optional embodiment, the locking element may also be directly configured on the frame 1 or other components fixedly connected to the frame 1.

[0170] In some optional embodiments, reference is made to the appendix. Figure 43 The figure shows a schematic diagram of the structure of the stop member 10. The stop member is configured as a hook 104 that restricts the upward movement of the operating member 11 when it cooperates with the operating member 11. The operating member 11 is limited by cooperating with the hook 104.

[0171] In some alternative embodiments, the actuating member 11 is provided with a groove 141 for engaging the hook 104.

[0172] In some optional embodiments, reference is made to the appendix. Figure 41 Appendix Figure 42 The figure shows a schematic diagram of the structure of the control member 11. The control member 11 is provided with a retaining plate 14 for engaging with the stop groove 102. In one more specific embodiment, the groove 141 is formed in the retaining plate 14.

[0173] As described above, in some optional embodiments, the linkage mechanism includes an elastic member 12 connected to the operating member 11, which generates a force on the operating member 11 to move it toward the stop groove 102, thereby preventing the operating member 11 from disengaging from the stop groove 102 and causing a disengagement event. Furthermore, the locking member is configured to at least overcome the elastic force of the elastic member 12 on the operating member 11 before disengaging from the operating member 11, thus reducing the possibility that the operating member 11 may easily disengage from the locking member due to vibration, and improving the safety of the user when disassembling the cutting table 3.

[0174] In other words, the header lifting device is equipped with locking mechanisms that restrict the operation of the control components, preventing the header from moving upwards. This avoids the control components from rapidly rebounding due to accidental detachment of the header from the lifting device, thus preventing injury to the user from being struck by the control components. In particular, it prevents injury to the user when removing the header from the chassis, as the control components, no longer restrained by the locking mechanisms, could rebound rapidly under the action of the buffer.

[0175] In some more specific embodiments, the force exerted by the elastic element 12 on the actuating element 11 is primarily directed toward the stop groove 102, that is, the direction of this force is from the slide rail 101 of the stop element 10 toward the stop groove 102. (See attached...) Figure 39 For example, the force exerted by the elastic element 12 on the operating element 11 is mainly directed from the slide rail 101 of the stop element 10 to either the left or the right towards the stop groove 102 on either side. The operating element 11 needs to overcome the above force to disengage from the locking element, which means that when the operating element 11 is engaged with the locking element, it is at least close to the stop groove 102 on either side, rather than at a position where the elastic element 12 does not exert a lateral force on the operating element 11.

[0176] As described above, in some optional embodiments, the cutting platform lifting device further includes a buffer connecting the frame 1 and the linkage assembly, used to reduce the pulling force required by the user to raise the cutting platform 3 by pulling the operating element 11. The locking element is configured to at least overcome part of the elastic force of the buffer on the operating element 11 before disengaging from the operating element 11. That is, it reduces the possibility that the operating element 11 may easily detach from the locking element due to vibration, improving the safety of the user when disassembling the cutting platform 3.

[0177] In some more specific embodiments, reference is made to the appendix. Figure 43 The hook 104 extends downward in a certain part. During the process of disengaging the operating member 11 from the hook 104, it needs to move along the downwardly extending hook 104. However, this movement needs to overcome the force exerted by the buffer on the operating member 11. Therefore, it is safer and more reliable to use the operating member 11 in conjunction with the locking member.

[0178] In another optional embodiment, a component capable of at least partially independent movement may be configured on the operating member 11 or the stop member 10. This component can be manipulated by the user to engage with the operating member 11 or the stop member 10 to limit the movement of the operating member 11. For example, a pin, a socket, etc. may be configured on the operating member 11 or the stop member 10.

[0179] One embodiment of this specification also discloses a lawnmower, which includes a frame 1, a cutter head 3, a battery pack, a cutter head lifting device, etc., as described above, wherein the battery pack is detachably mounted on the frame 1. The cutter head lifting device includes a stop member 10 and a locking member. The stop member 10 is connected to the frame 1 and includes a slide 101 through which an operating member 11 passes and a stop groove 102, wherein the cutter head 3 cannot move downward when the operating member 11 is engaged with the stop groove 102; the locking member is connected to the frame 1, wherein the cutter head 3 cannot move upward when the operating member 11 is engaged with the locking member.

[0180] It should be noted that: the support platform in some embodiments of this specification is seat 2, but the cutting platform lifting device in the above embodiments is also applicable to other lawnmowers that do not have seat 2, such as standing lawnmowers. Furthermore, the solution that does not include a support platform in this specification is a push lawnmower or a self-propelled lawnmower; that is, it should be understood that the lawnmowers to be protected by this specification include, but are not limited to, riding lawnmowers and standing lawnmowers.

[0181] In other embodiments of this specification, the cutter blade at the mower 3 is driven by a mowing motor, and the mower should include a battery pack that powers the mower 3.

[0182] This specification is not limited to the specific embodiments described above. Those skilled in the art will readily understand that many alternative solutions exist for the lawnmower and mower lifting device described herein without departing from the principles and scope of this specification. The scope of protection of this specification is determined by the claims.

Claims

1. A cutting table lifting device, connecting the frame of a lawnmower and the cutting table, characterized in that, include: Control components; A translation mechanism, connecting the cutting table and the vehicle frame, is used to limit the angle between the cutting table and the vehicle frame to remain constant when the cutting table moves. A linkage mechanism connects the control element and the translation mechanism; when the control element is pulled by the user, it causes the cutting table to move upward or downward. A gear shifting component is connected to the vehicle frame. The gear shifting component includes a slide rail through which the operating component passes and a gear shifting groove. The cutting table cannot move downward when the operating component is engaged with the gear shifting groove. A locking component is connected to the vehicle frame, and the cutting table cannot move upward when the operating component is engaged with the locking component.

2. The cutting platform lifting device according to claim 1, characterized in that: The control element can engage with the locking element when the cutting table is at least close to its lowest point.

3. The cutting platform lifting device according to claim 1, characterized in that: The locking component is disposed on the stop component.

4. The cutting platform lifting device according to claim 1 or 3, characterized in that: The locking element is configured as a hook that restricts the upward movement of the control element when it is engaged with the control element.

5. The cutting platform lifting device according to claim 4, characterized in that: The control element is provided with grooves for engaging the hook.

6. The cutting platform lifting device according to claim 5, characterized in that: The control element is equipped with a retaining plate for engaging the gear slot, and the groove is formed in the retaining plate.

7. The cutting platform lifting device according to claim 2, characterized in that: The linkage mechanism includes an elastic element connected to the control member, which generates a force on the control member to move it toward the gear slot.

8. The cutting platform lifting device according to claim 7, characterized in that: The locking component is configured to at least overcome part of the elastic force exerted by the elastic component on the operating component before it can disengage from the operating component.

9. The cutting platform lifting device according to claim 1, characterized in that: The cutting platform lifting device also includes a buffer component connecting the frame and the linkage assembly, used to reduce the pulling force required by the user to raise the cutting platform by pulling the control component. The locking component is configured to at least overcome part of the elastic force of the buffer component on the control component before it can disengage from the control component.

10. A lawnmower, characterized in that, include: Frame; A cutting platform, located under the vehicle frame, is used for mowing grass; The battery pack, mounted on the chassis, is used to power the cutting table; Cutting table lifting device, the cutting table lifting device comprising: Control components; A translation mechanism, connecting the cutting table and the vehicle frame, is used to limit the angle between the cutting table and the vehicle frame to remain constant when the cutting table moves. A linkage mechanism connects the control element and the translation mechanism; when the control element is pulled by the user, it causes the cutting table to move upward or downward. A gear shifting component is connected to the vehicle frame. The gear shifting component includes a slide rail through which the operating component passes and a gear shifting groove. The cutting table cannot move downward when the operating component is engaged with the gear shifting groove. A locking component is connected to the vehicle frame, and the cutting table cannot move upward when the operating component is engaged with the locking component.

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