CN219588082U

CN219588082U - Gear shifting mechanism and lawn mower

Info

Publication number: CN219588082U
Application number: CN202320853039.2U
Authority: CN
Inventors: 秦俊; 邹洪波; 张健; 罗中亿
Original assignee: Chongqing Rato Technology Co Ltd
Current assignee: Chongqing Rato Technology Co Ltd
Priority date: 2023-04-17
Filing date: 2023-04-17
Publication date: 2023-08-25
Anticipated expiration: 2033-04-17

Abstract

The utility model belongs to the technical field of lawn mowers, and provides a gear shifting mechanism, which comprises a gear shifting box, wherein the gear shifting box comprises a shell, a shifting fork, a forward gear, a backward gear, a sliding gear, a power output shaft, a power input shaft and a transmission gear, and further comprises: the pedal is hinged with the frame of the lawn mower and can rotate around the X-axis direction; the power input end of the transmission unit is connected with the power output end of the pedal, the power output end of the transmission unit is connected with the shifting fork, and the transmission unit is used for driving the shifting fork to shift the sliding gear to move; still provide a lawn mower, including above-mentioned gear shifting structure. The gear shifting mechanism and the lawn mower provided by the utility model are simple in structure, reasonable in design, capable of achieving the purpose of switching the forward gear, the backward gear and the neutral gear through pedal, and convenient to operate.

Description

Gear shifting mechanism and lawn mower

Technical Field

The utility model relates to the technical field of lawn mowers, in particular to a gear shifting mechanism and a lawn mower.

Background

The shift structure of riding lawn mowers is typically designed with forward gears, reverse gears, and neutral gears for controlling the forward, reverse, and stop of the lawn vehicle. The lawn car among the prior art structure of shifting includes action bars, drive unit and case of shifting.

The gear shifting structure has the following defects: in the advancing and retreating process, an operator needs to operate the operating lever by hand to achieve the purpose of controlling the advancing and retreating of the lawn mower, so that in the grass cutting process, the operator needs to control the steering wheel by hand and the operating lever by hand, and the operation is inconvenient.

Disclosure of Invention

In view of the drawbacks of the prior art, it is an object of the present utility model to provide a gear shifting mechanism and a lawn mower that allow the lawn mower to be foot-controlled in advancing, retracting and stopping.

In order to achieve the above object, the present utility model provides a shift mechanism including a shift box including a housing, a fork, a forward gear, a reverse gear, a slide gear, a power output shaft, a power input shaft, and a transmission gear, further including:

the pedal is hinged with the frame of the lawn mower and can rotate around the X-axis direction; and

and the power input end of the transmission unit is connected with the power output end of the pedal, the power output end of the transmission unit is connected with the shifting fork, and the transmission unit is used for driving the shifting fork to shift the sliding gear to move.

Further, the transmission unit includes:

the push-pull arm is arranged along the X-axis direction and is in sliding connection with the gear shifting box, the first end of the push-pull arm is fixedly connected with the shifting fork, the second end of the push-pull arm extends in a direction away from the shifting fork, and the push-pull arm can do reciprocating linear motion along the X-axis direction; and

and the power input end of the transmission assembly is connected with the power output end of the pedal, and the power output end of the transmission assembly is connected with the power input end of the push-pull arm.

Further, the transmission assembly includes:

the transmission shaft is arranged along the Z-axis direction and is rotationally connected with the gear shifting box, and the transmission shaft can rotate around the Z-axis direction;

the first end of the shifting arm is fixedly connected with the first end of the transmission shaft, the second end of the shifting arm is connected with the push-pull arm, and the shifting arm is used for driving the push-pull arm to move; and

and the power input end of the transmission structure is connected with the power output end of the pedal, and the power output end of the transmission structure is connected with the power input end of the transmission shaft and is used for driving the transmission shaft to rotate.

Further, the transmission structure includes:

the first end of the first swing arm is arranged at the hinging center of the pedal and is fixedly connected with the pedal;

the middle part of the rocker arm is hinged with the frame and can rotate around the X-axis direction;

the first end of the first push-pull rod is hinged with the second end of the first swing arm, and the second end of the first push-pull rod is hinged with the first end of the rocker arm; and

and the first end of the second push-pull rod is hinged with the second end of the rocker arm, and the second end of the second push-pull rod is connected with the power input end of the transmission shaft.

Further, the transmission structure further includes:

the first end of the second swing arm is rotatably sleeved on the transmission shaft, the second end of the second swing arm is hinged with the second end of the second push-pull rod, and the second swing arm can rotate around the Z-axis direction;

the first end of the transmission plate is fixedly sleeved on the transmission shaft, the second end of the transmission plate extends towards the direction close to the second end of the second swing arm, two sliding holes are symmetrically formed in the second end of the transmission plate, and one ends, far away from the transmission shaft, of the two sliding holes are closer;

the two sliding blocks are respectively connected with the transmission plate in a sliding way through the two sliding holes; and

the two ends of the first elastic piece are respectively connected with the two sliding blocks, and in a natural state, the first elastic piece has a tendency of enabling the two sliding blocks to move towards each other;

the poking arms are positioned between the two sliding blocks, and one ends of the sliding blocks facing the poking arms extend to one sides of the poking arms far away from the transmission plate and are in contact with the transmission plate.

Further, the transmission structure further includes:

the two clamping plates are in number, the first ends of the two clamping plates are rotationally connected with the transmission shaft, and the second ends of the two clamping plates extend in the direction away from the axis of the transmission shaft;

the reset plate is L-shaped, the first end of the reset plate is fixedly connected with the transmission shaft, and the second end of the reset plate extends between the two clamping plates;

the two ends of the second elastic piece are respectively connected with the two clamping plates, and in a natural state, the second elastic piece has a tendency of enabling the two clamping plates to move towards each other; and

the first end of the limiting block is fixedly connected with the gear shifting box, the second end of the limiting block extends between the two clamping plates, and the width of the limiting block is matched with the width of the reset plate.

In another aspect, the present utility model provides a lawn mower comprising a gear shifting mechanism as described in any one of the preceding claims.

The utility model has the beneficial effects that:

according to the gear shifting mechanism and the lawn mower, the purpose of driving the sliding gear of the gear shifting box to move through pedal stepping is achieved through the pedal, and further the purpose of switching the forward gear, the backward gear and the neutral gear of the gear shifting box through the foot is achieved, and the operation is convenient.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. Like elements or portions are generally identified by like reference numerals throughout the several figures. In the drawings, elements or portions thereof are not necessarily drawn to scale.

FIG. 1 is an assembled perspective view of a gear shifting mechanism and a frame of a lawn mower according to an embodiment of the present utility model;

fig. 2 is an enlarged view at a shown in fig. 1;

fig. 3 is an enlarged view at B shown in fig. 1;

fig. 4 is an enlarged view at C shown in fig. 1;

FIG. 5 is a view (direction one) of the internal structure at C shown in FIG. 1;

fig. 6 is an internal structure view (direction two) at C shown in fig. 1.

Reference numerals:

the gear box 100, the housing 110, the shifting fork 120, the forward gear 130, the backward gear 140, the sliding gear 150, the pedal 201, the push-pull arm 202, the transmission shaft 203, the toggle arm 204, the first swing arm 205, the rocker arm 206, the first push-pull rod 207, the second push-pull rod 208, the second swing arm 209, the transmission plate 210, the sliding block 211, the first elastic member 212, the clamping plate 213, the reset plate 214, the second elastic member 215 and the limiting block 216.

Detailed Description

Embodiments of the technical scheme of the present utility model will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present utility model, and thus are merely examples, and are not intended to limit the scope of the present utility model.

It is noted that unless otherwise indicated, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this utility model belongs.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. In the description of the present utility model, the meaning of "plurality" is two or more unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

As shown in fig. 1 to 6, the present utility model provides a shift mechanism including a shift box 100 including a housing 110, a fork 120, a forward gear 130, a reverse gear 140, a slide gear 150, a power output shaft, a power input shaft, and a transmission gear. Specifically, the power input shaft is in driving connection with the power output end of the engine. The transmission gear, the forward gear 130 and the backward gear 140 are bevel gears, the transmission gear is fixedly sleeved on the power input shaft, the forward gear 130 and the backward gear 140 are rotatably sleeved on the power output shaft, and the forward gear 130 and the backward gear 140 are respectively arranged on two sides of the transmission gear and are meshed with the transmission gear. The sliding gear 150 is slidably sleeved on the power output shaft and located between the forward gear 130 and the backward gear 140, and an internal gear matched with the sliding gear 150 is disposed on one side of the forward gear 130 and the backward gear 140 facing the sliding gear 150. The shift fork 120 is sleeved on the sliding gear 150, and the shift fork 120 is used for driving the sliding gear 150 to move. Specifically, when the sliding gear 150 is in the working position I, the sliding gear 150 is not meshed with the internal gear of the forward gear 130 and is not meshed with the internal gear of the backward gear 140, and the power transmitted from the power input shaft cannot be transmitted to the power output shaft through the forward gear 130 or the power output shaft through the backward gear 140, that is, the sliding gear 150 is in the neutral position; when the sliding gear 150 is in the working position II, the sliding gear 150 is meshed with the internal gear on the advancing gear 130, so that the power transmitted from the power input shaft can be transmitted to the sliding gear 150 through the advancing gear 130, and the sliding gear 150 drives the power output shaft to rotate, so that the purpose of driving the lawn mower to advance is achieved; when the sliding gear 150 is at the working position III, the sliding gear 150 is meshed with the internal gear on the reverse gear 140, so that the power transmitted from the power input shaft can be transmitted to the sliding gear 150 through the reverse gear 140, and the sliding gear 150 drives the power output shaft to rotate, thereby achieving the purpose of driving the lawn mower to move backwards. These are prior art and will not be described in detail herein.

For a better understanding of the structure and principles of the present utility model, we first define herein the X-axis, Y-axis and Z-axis. Wherein, the X axis is the width direction of lawn mower, the Y axis is the length direction of lawn mower, the Z axis is vertical direction.

The above-mentioned gear shifting mechanism further includes a pedal 201 and a transmission unit.

The pedal 201 is hinged with the frame of the lawn mower, and the pedal 201 can rotate around the X-axis direction, namely, the hinge center line of the pedal 201 is along the X-axis direction. In particular, the pedal 201 has three working positions, which we name here a first working position a, a second working position a and a third working position a. When the sliding gear 150 is at the working position I, the pedals 201 are respectively at the first working positions a; when the sliding gear 150 is at the working position II, the pedals 201 are respectively at the second working positions a; when the slide gear 150 is in the operating position III, the pedals 201 are respectively in the third operating position a.

The pedal 201 is driven from the first working position A or the third working position A to the second working position A by stepping the pedal 201, the pedal 201 drives the sliding gear 150 from the working position I or the working position III to the working position II by a transmission unit, the sliding gear 150 is meshed with an internal gear on the advancing gear 130, so that power transmitted from a power input shaft can be transmitted to the sliding gear 150 through the advancing gear 130, and the sliding gear 150 drives a power output shaft to rotate, thereby achieving the purpose of driving the lawn mower to advance.

The power input end of the transmission unit is connected with the power output end of the pedal 201, and the power output end is connected with the shifting fork 120, and the power output end is used for driving the shifting fork 120 to shift the sliding gear 150.

When the gear shifting device is used, the pedal 201 is driven to rotate by stepping on the pedal 201, so that the shifting fork 120 is driven to shift the sliding gear 150 through the transmission unit, and the purpose of gear shifting is achieved.

Specifically, the pedal 201 is driven from the first working position a or the second working position a to the third working position a by stepping on the pedal 201, the pedal 201 drives the sliding gear 150 from the working position I or the working position II to the working position III through the transmission unit, the sliding gear 150 is meshed with the internal gear on the reverse gear 140, so that the power transmitted from the power input shaft can be transmitted to the sliding gear 150 through the reverse gear 140, and the sliding gear 150 drives the power output shaft to rotate, thereby achieving the purpose of driving the lawn mower to retreat.

The pedal 201 is driven from the second operating position a or the third operating position a to the first operating position a by stepping on the pedal 201, the pedal 201 drives the slide gear 150 from the operating position II or the operating position III to the operating position I by the transmission unit, the slide gear 150 is not meshed with the internal gear of the forward gear 130 nor the internal gear of the reverse gear 140, and the power transmitted from the power input shaft cannot be transmitted to the power output shaft through the forward gear 130 or the reverse gear 140, i.e., the slide gear 150 is in the neutral position.

Preferably, the middle part of the pedal 201 is hinged to the frame of the lawn mower so as to drive the pedal 201 to rotate in a forward or reverse direction by stepping on the pedal 201 by a foot, and at the same time, to facilitate determination of the position of the shutter, specifically, when the pedal 201 is kept at the first operating position a, the shift box 100 is in the neutral position, when the pedal 201 is stepped forward, the pedal 201 is rotated in the forward direction to the second operating position a, the shift box 100 is in the forward gear, and when the pedal 201 is stepped backward, the pedal 201 is rotated in the reverse direction to the third operating position a, and the shift box 100 is in the reverse gear.

The gear shifting structure with the structure is simple in structure and reasonable in design, can achieve the purposes of controlling the lawn mower to move forwards, backwards and stop through stepping on the pedal 201, and is convenient to operate.

In one embodiment, the transmission unit includes a push-pull arm 202 and a transmission assembly.

The push-pull arm 202 is disposed along the X-axis direction and slidably connected to the shift box 100, the first end of the push-pull arm 202 is fixedly connected to the shift fork 120, the second end extends away from the shift fork 120, and the push-pull arm 202 can perform a reciprocating linear motion along the X-axis direction. The power input end of the transmission assembly is connected with the power output end of the pedal 201, and the power output end is connected with the power input end of the push-pull arm 202.

When the gear shifting device is used, the pedal 201 is driven to rotate by stepping on the pedal 201, the pedal 201 drives the push-pull arm 202 to move through the transmission assembly, the push-pull arm 202 drives the shifting fork 120 to move, and the shifting fork 120 shifts the sliding gear 150 to move, so that the gear shifting purpose is achieved.

The transmission unit with the structure has the advantages of simple structure, reasonable design and convenient operation.

In one embodiment, the drive assembly includes a drive shaft 203, a dial arm 204, and a drive structure.

The transmission shaft 203 is disposed along the Z-axis direction and is rotatably connected to the shift box 100, and the transmission shaft 203 is rotatable about the Z-axis direction. The first end of the pulling arm 204 is fixedly connected with the first end of the transmission shaft 203, the second end is connected with the push-pull arm 202, and the transmission shaft 203 is used for driving the push-pull arm 202 to move. Specifically, a second end of the toggle arm 204 is provided with a clamping groove, and the push-pull arm 202 is provided with a clamping block adapted to the clamping groove, and the clamping block is movably inserted into the clamping groove and fixedly connected with the push-pull arm 202. The power input end of the transmission structure is connected with the power output end of the pedal 201, and the power output end is connected with the power input end of the transmission shaft 203.

When the gear shifting device is used, the pedal 201 is driven to rotate by pedaling the pedal 201, the pedal 201 drives the transmission shaft 203 to rotate through the transmission structure, the transmission shaft 203 drives the shifting arm 204 to rotate, the shifting arm 204 drives the push-pull arm 202 to move, the push-pull arm 202 drives the shifting fork 120 to move, and the shifting fork 120 drives the sliding gear 150 to rotate, so that the gear shifting purpose is achieved.

The transmission component with the structure has the advantages of simple structure, reasonable design and convenient operation.

In one embodiment, the transmission structure includes a first swing arm 205, a swing arm 206, a first push-pull rod 207, and a second push-pull rod 208.

The first end of the first swing arm 205 is disposed at the hinge center of the pedal 201 and fixedly connected with the pedal 201 such that the second end of the first swing arm 205 rotates around the first end and the rotation center line of the first swing arm 205 coincides with the rotation center line of the pedal 201. The middle part of the rocker arm 206 is hinged with the frame of the lawn mower, and the rocker arm 206 can rotate around the X-axis direction. The first push-pull rod 207 is hinged at a first end to a second end of the first swing arm 205 and at a second end to a first end of the swing arm 206. The first end of the first push-pull rod 207 is hinged to the second end of the first swing arm 205. The first end of the second push-pull rod 208 is hinged to the second end of the rocker arm 206, and the second end is connected to the power input end of the transmission shaft 203.

When the gear shifting device is used, a pedal 201 is stepped on by a foot to drive the pedal 201 to rotate, the pedal 201 drives a first swing arm 205 to rotate, the first swing arm 205 drives a rocker arm 206 to rotate through a first push-pull rod 207, the rocker arm 206 drives a transmission shaft 203 to drive through a second push-pull rod 208, the transmission shaft 203 drives a shifting arm 204 to rotate, the shifting arm 204 drives a push-pull arm 202 to move, the push-pull arm 202 drives a shifting fork 120 to move, and the shifting fork 120 drives a sliding gear 150 to rotate, so that the gear shifting purpose is achieved.

The transmission structure of the structure has the advantages of simple structure, reasonable design and convenient operation.

In one embodiment, the transmission structure further includes a second swing arm 209, a transmission plate 210, a slider 211, and a first elastic member 212.

The first end of the second swing arm 209 is rotatably sleeved on the transmission shaft 203, the second end of the second swing arm 209 is hinged with the second end of the second push-pull rod 208, and the second swing arm 209 can rotate around the Z-axis direction. The first end of the driving plate 210 is fixedly sleeved on the driving shaft 203, and the second end extends to a direction approaching to the second end of the second swing arm 209. Preferably, the driving plate 210 is parallel to the second swing arm 209. The second end of the driving plate 210 is symmetrically provided with two sliding holes, and one end of the two sliding holes far away from the driving shaft 203 is closer, i.e. the two sliding holes form a splayed shape, and one end of the two sliding holes far away from the driving shaft 203 is closer. The number of the sliding blocks 211 is two, and the two sliding blocks 211 are respectively connected with the transmission plate 210 in a sliding way through two sliding holes.

The first elastic member 212 is connected to the two sliders 211 at both ends thereof, respectively, and in a natural state, the first elastic member 212 has a tendency to move the two sliders 211 in a direction toward each other. Preferably, the first elastic member 212 is a spring.

The toggle arm 204 is located between the two sliding blocks 211, and one end of the sliding block 211 facing the toggle arm 204 extends to one side of the toggle arm 204 away from the transmission plate 210 and is abutted against the wave arm, so that when the toggle arm 204 rotates, the sliding block 211 can be driven to move through the toggle arm 204, and the second swing arm 209 is driven to rotate through the sliding block 211.

In use, when the pedal 201 is stepped on by a foot, the pedal 201 drives the first swing arm 205 to rotate, the first swing arm 205 drives the first push-pull rod 207 to move, the first push-pull rod 207 drives the rocker arm 206 to rotate, the rocker arm 206 drives the second push-pull rod 208 to move, the second push-pull rod 208 drives the second swing arm 209 to rotate, the second swing arm 209 drives the sliding block 211 to move, when the sliding block 211 moves to a certain position, the sliding block 211 rotates with the transmission plate 210, the transmission plate 210 rotates with the transmission shaft 203, the transmission shaft 203 rotates with the stirring arm 204, the stirring arm 204 moves with the push-pull arm 202, the push-pull arm 202 moves with the shifting fork 120, and the shifting fork 120 moves with the sliding gear 150, so that the aim of shifting gears is achieved.

Specifically, the principle of the transmission structure in the present embodiment is explained for the sake of better convenience. Here we refer to the two slide holes as slide hole a and slide hole B, respectively, the slide block 211 slidably inserted in the slide hole a is the slide block a, and the slide block 211 slidably inserted in the slide hole B is the slide block B. Meanwhile, since the pedal 201 has three working positions, the second swing arm 209 also has three working positions, which we call here the first working position B, the second working position B, and the third working position B, respectively. Wherein, when the pedal 201 is in the first working position a, the second swing arm 209 is in the first working position B, when the pedal 201 is in the second working position a, the second swing arm 209 is in the second working position B, and when the pedal 201 is in the third working position a, the second swing arm 209 is in the third working position B.

In the process that the second swing arm 209 rotates from the first working position B to the second working position B, the second swing arm 209 firstly moves along one end of the sliding hole a, which is close to the transmission shaft 203, of the sliding hole a, the sliding block a moves along the sliding hole B to one end of the sliding hole B, which is far away from the transmission shaft 203, through the first elastic piece 212, the sliding block B rotates along the transmission shaft 210 when the sliding block B moves to one end of the sliding hole B, which is far away from the transmission shaft 203, the transmission plate 210 rotates along the transmission shaft 203, the transmission shaft 203 rotates along the toggle arm 204, the toggle arm 204 moves along the push-pull arm 202, the push-pull arm 202 moves along the shift fork 120 moves along the sliding gear 150, and therefore the purpose of sliding is achieved.

In the process that the second swing arm 209 rotates from the first working position B to the third working position B, the second swing arm 209 firstly moves along one end of the sliding hole B, which is close to the transmission shaft 203, of the sliding hole B, the sliding block B moves along one end of the sliding hole a, which is far away from the transmission shaft 203, of the sliding hole a through the first elastic piece 212, the sliding block a moves along the sliding hole a, and when the sliding block a moves to one end of the sliding hole a, which is far away from the transmission shaft 203, the sliding block a rotates along the transmission plate 210, the transmission plate 210 rotates along the transmission shaft 203, the transmission shaft 203 rotates along the toggle arm 204, the toggle arm 204 moves along the push-pull arm 202, the push-pull arm 202 moves along the shift fork 120, and the shift fork 120 moves along the sliding gear 150, so that the purpose of sliding gear is achieved.

The design has the advantages that: firstly, after the pedal 201 needs to drive the second swing arm 209 to rotate for a certain angle, the second swing arm 209 will rotate with the driving plate 210 through the sliding block 211, so that the driving plate 210 rotates with the driving shaft 203, and the purpose of sliding is achieved, so that the movement stroke of the pedal 201 can be enlarged, and the gear shifting operability is improved; secondly, the corresponding sliding blocks 211 are pulled by the elastic force of the first elastic members 212 to drive the driving plate 210 to rotate, if the sliding gear 150 does not correspond to the internal gears on the forward gear 130 and the backward gear 140 in the gear shifting process, the gear shifting prevention function can be achieved due to the deformation of the first elastic members 212, and after the sliding gear 150 corresponds to the internal gears on the forward gear 130 and the backward gear 140, the sliding gear 150 moves to the position meshed with the internal gears on the forward gear 130 and the backward gear 140 under the elastic force of the first elastic members 212, so that the gear shifting purpose is achieved.

In one embodiment, the transmission structure further includes a clamping plate 213, a reset plate 214, a second elastic member 215, and a stopper 216.

The number of the clamping plates 213 is two, the first ends of the two clamping plates 213 are rotatably connected with the transmission shaft 203, and the second ends extend in a direction away from the axis of the transmission shaft 203. The reset plate 214 is L-shaped, a first end of the reset plate 214 is fixedly connected with the transmission shaft 203, and a second end extends between the two clamping plates 213. The second elastic member 215 is connected to the two clamping plates 213 at both ends thereof, respectively, and has a tendency to move the two clamping plates 213 in a direction approaching each other in a natural state. Specifically, the second elastic member 215 is a spring. The first end of the limiting block 216 is fixedly connected with the gear shifting box 100, the second end extends between the two clamping plates 213, and the width of the limiting block 216 is matched with the width of the reset plate 214. Specifically, when the pedal 201 is in the first operating position a, the return plate 214 corresponds to the stopper 216.

In use, the transmission shaft 203 rotates with the reset plate 214, the reset plate 214 rotates with one 213 of the two clamping plates 213 against the elastic force of the second elastic member 215, the other clamping plate 213 cannot rotate under the action of the limiting block 216, so that after the pedal 201 is released, the clamping plate 213 moves with the reset plate 214 under the elastic force of the second elastic member 215, so that the reset plate 214 moves to a position corresponding to the limiting block 216, and the pedal 201 is reset to the first working position a.

The transmission structure of the structure has simple structure and reasonable design, and is convenient for the resetting of the pedal 201, so that the pedal 201 can be kept at the first working position A when an operator does not step on the pedal 201.

In the description of the present utility model, numerous specific details are set forth. However, it is understood that embodiments of the utility model may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model, and are intended to be included within the scope of the appended claims and description.

Claims

1. The utility model provides a gearshift, includes the case of shifting, the case of shifting includes casing, shift fork, advancing gear, back gear, sliding gear, power take off shaft, power input shaft and drive gear, its characterized in that: further comprises:

2. A gear shift mechanism according to claim 1, wherein the transmission unit comprises:

3. The shift mechanism of claim 2, wherein the transmission assembly comprises:

4. A gear shift mechanism according to claim 3, wherein the transmission structure comprises:

5. The shift mechanism of claim 4, wherein the transmission structure further comprises:

6. A gear change mechanism according to any one of claims 4-5, wherein the transmission structure further comprises:

7. A lawn mower, characterized in that: a gear shift mechanism according to any one of claims 1 to 6.