Gearbox gear shifting mechanism

Abstract

The utility model relates to the technical field of agricultural machinery, and discloses a gearbox gear shifting mechanism which comprises a shell, a gear shifting rod, a first control piece and a second control piece, one end of the gear shifting rod is located outside the shell, the other end of the gear shifting rod can stretch into the first control piece or the second control piece, and the middle of the gear shifting rod is rotationally connected with the shell. The first control piece can be attached to the second control piece, the first control piece and the second control piece are both rotationally connected with the shell, the first control piece is located between the second control piece and the shell, limiting wings are symmetrically arranged on the two sides of the first control piece, stop blocks are arranged at the ends of the limiting wings, and the stop blocks can abut against the side edge of the second control piece. The first limiting piece is used for limiting the second control piece, is located on the outer side of the second control piece and is fixedly connected with the shell. According to the gear shifting handle, the distance between the gear shifting handle and an operator can be prevented from being greatly increased during gear shifting, and operation can be facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of agricultural machinery, and particularly relates to a gear shifting mechanism for a gearbox. Background Art

[0002] When shifting gears of a ride-on micro-tiller, controlling the gear shifting handle to swing forward or backward drives the shift fork to swing on the main shaft of the gearbox, thereby driving the shift gear to move on the main shaft to engage with the corresponding gear to achieve the output of the corresponding gear position. When the operator sits on the micro-tiller and operates the gear shifting handle to shift gears, since the gear shifting handle of the ride-on micro-tiller is located on one side of the steering wheel and in front of the seat of the ride-on micro-tiller, and the gear shifting handle can only move back and forth. When high gear output is required, the gear shifting handle needs to move forward in the direction away from the operator, and the distance between the gear shifting handle and the operator increases significantly. At this time, the upper body needs to lean forward to control the gear shifting handle to move forward, and the operation is inconvenient. Content of the Utility Model

[0003] In order to overcome the deficiencies of the prior art, the purpose of the utility model is to provide a gear shifting mechanism for a gearbox, which can avoid a significant increase in the distance between the gear shifting handle and the operator during gear shifting and facilitate the operation.

[0004] The technical solution adopted by the utility model is as follows: A gear shifting mechanism for a gearbox includes a housing, and further includes a gear shifting rod, a first control member, and a second control member. One end of the gear shifting rod is located outside the housing, and the other end can extend into the first control member or the second control member. The middle part of the gear shifting rod is rotatably connected to the housing. The first control member can be attached to the second control member. Both the first control member and the second control member are rotatably connected to the housing. The first control member is located between the second control member and the housing. Limiting wings are symmetrically arranged on both sides of the first control member, and a stop block is arranged at the end of the limiting wing. The stop block can be abutted against the side of the second control member.

[0005] Principle of the Technical Solution

[0006] In the initial state, the first control member and the second control member are in contact, the transmission is in the neutral output state, the shift lever is at the middle position, the shift lever rotates relative to the housing to the left and extends into the first control member, the second control member remains stationary, hold the shift lever and drive it forward, the shift lever controls the first control member to rotate counterclockwise in the vertical plane, the block on one of the limiting wings on the first control member abuts against the side of the second control member, and the first control member is used to control the first shift fork in the transmission housing to be directly above to achieve first gear output. Hold the shift lever and drive it backward, the shift lever controls the first control member to return to the initial position to achieve neutral output. Hold the shift lever and drive it backward, the shift lever controls the first control member to rotate clockwise in the vertical plane, the block on the other limiting wing on the first control member abuts against the side of the second control member, and the first control member is used to control the first shift fork in the transmission housing to be directly below to achieve reverse gear output. The shift lever controls the first control member to return to the initial position to achieve neutral output;

[0007] The shift lever rotates relative to the housing to the right and extends into the second control member, the first control member remains stationary, hold the shift lever and drive it backward, the shift lever controls the second control member to rotate clockwise in the vertical plane, the side of the second control member abuts against the block on one of the limiting wings on the first control member, and the second control member is used to control the second shift fork in the transmission housing to be directly above to achieve second gear output. Hold the shift lever and drive it forward, the shift lever controls the second control member to return to the initial position to achieve neutral output. Hold the shift lever and drive it forward, the shift lever controls the second control member to rotate counterclockwise in the vertical plane, the side of the second control member abuts against the block on the other limiting wing on the first control member, and the second control member is used to control the second shift fork in the transmission housing to be directly below to achieve third gear output. The shift lever controls the second control member to return to the initial position to achieve neutral output.

[0008] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0009] The design that the middle part of the shift lever of the present utility model is rotatably connected to the housing, one end of the shift lever can extend into the first control member or the second control member, and both the first control member and the second control member are rotatably connected to the housing enables the shift lever to drive the first control member and the second control member to move when shifting gears, thereby achieving gear shifting. When shifting gears, the shift lever moves along an I-shaped path. Compared with the shift lever that can only move back and forth along a straight-line path, it can avoid significantly increasing the distance between the shift handle and the operator during gear shifting and is convenient for operation.

[0010] As a preferred embodiment of the present utility model, the first control member includes a first connecting portion rotatably connected to the housing, a first engaging portion engaged with a first shift fork in the gearbox housing, and a first cavity for receiving the end of the shift lever. The first engaging portion and the first cavity are respectively connected to the first connecting portion, and the first engaging portion and the first cavity are perpendicular to each other. The limiting wings are respectively located on both sides of the connection between the first connecting portion and the first cavity.

[0011] As a preferred embodiment of the present utility model, the second control member includes a second connecting portion rotatably connected to the housing, a second engaging portion engaged with a second shift fork in the gearbox housing, and a second cavity for receiving the end of the shift lever. The second engaging portion and the second cavity are respectively connected to the first connecting portion, and the second engaging portion and the second cavity are perpendicular to each other. The stopper can be abutted against the side of the second connecting portion.

[0012] As a preferred embodiment of the present utility model, the first connecting portion is attached to the second connecting portion. The first connecting portion is provided with a first connecting hole, and the second connecting portion is provided with a second connecting hole that coincides with the first connecting hole. The second connecting portion and the first connecting portion are rotatably connected to the housing through the first connecting hole and the second connecting hole. The first connecting portion can rotate relative to the second connecting portion and the housing, and the second connecting portion can rotate relative to the first connecting portion and the housing. When the first cavity and the second cavity are attached, the center points of the first engaging portion, the second engaging portion, and the first connecting portion are collinear. The shift lever is located between the first cavity and the second cavity. The lower end of the second cavity faces the first cavity, and the upper end of the second cavity is located above the first cavity.

[0013] Beneficial effects: Since the shift lever rotates, the upper end of the second cavity being located above the first cavity can ensure that the shift lever is accurately located in the first cavity or the second cavity after rotation.

[0014] As a preferred embodiment of the present utility model, it further includes a first limiting member for limiting the second control member. The first control member is close to the inner wall of the housing. The first control member can be attached to the second control member. The second control member is located outside the first control member. The first limiting member is located outside the second control member and abuts against and limits the outer surface of the second control member. The first limiting member is fixedly connected to the housing.

[0015] Beneficial effects: The first limiting member can limit the second control member to ensure that the second control member is uniformly stressed.

[0016] As a preferred embodiment of the present utility model, a first sphere is provided in the middle of the shift lever, and the housing is provided with a through hole. The shift lever is rotatably connected to the housing through the first sphere and the through hole.

[0017] As a preferred embodiment of the present utility model, a second sphere is provided at one end of the shift lever that can extend into the first control member.

[0018] Beneficial effects: Compared with the design where one end of the shift lever is a cylinder, the second sphere can increase the contact area between the shift lever and the first control member or the second control member, and can ensure that the shift lever can smoothly rotate from the first control member into the second control member.

[0019] As a preferred embodiment of the present utility model, a third sphere is provided at one end of the shift lever away from the housing.

[0020] Beneficial effects: It is convenient for the driver to operate the shift lever. Description of the Drawings

[0021] Figure 1 is a schematic structural view of the transmission shift mechanism of the present utility model;

[0022] Figure 2 is a schematic structural view of the transmission shift mechanism of the present utility model from another angle;

[0023] Figure 3 is a schematic structural view of the transmission shift mechanism of the present utility model from yet another angle;

[0024] Figure 4 is a schematic partial structural view of the transmission shift mechanism of the present utility model;

[0025] Figure 5 is a schematic partial structural view of the transmission shift mechanism of the present utility model from another angle;

[0026] Figure 6 is a schematic partial structural view of the transmission shift mechanism of the present utility model from yet another angle;

[0027] Figure 7 is a schematic partial structural view of the transmission shift mechanism of the present utility model from still another angle. Detailed Embodiments

[0028] Typical embodiments embodying the features and advantages of the present utility model will be specifically described in the following description. It should be understood that the present utility model can have various changes in different embodiments, all of which do not depart from the scope of the present utility model, and the descriptions and illustrations therein are essentially for illustrative purposes and not for limiting the present utility model.

[0029] In the description of the present application, the orientation or positional relationship indicated by terms such as "first", "second", "one side", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the structure referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0030] The present utility model will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0031] The reference numerals include: housing 1, shift lever 2, first sphere 201, second sphere 202, first control member 3, first connecting portion 301, first clamping portion 302, first cavity 303, second control member 4, second connecting portion 401, second clamping portion 402, second cavity 403, limiting wing 5, stop block 6, and first limiting member 7.

[0032] As Figure 1-6 shown, a transmission shift mechanism, as Figure 1 , 2 , 4 shown, includes a housing 1, a shift lever 2, a first control member 3, a second control member 4, and a first limiting member 7. The housing 1 is provided with a through hole. One end of the shift lever 2 away from the housing 1 is provided with a third sphere. As Figure 4 shown, a first sphere 201 is provided in the middle of the shift lever 2 at the through hole. The shift lever 2 is rotatably connected to the housing 1 through the first sphere 201 and the through hole. One end of the shift lever 2 located inside the housing 1 is provided with a second sphere 202.

[0033] As Figure 4 shown, the first control member 3 includes a first connecting portion 301 rotatably connected to the housing 1, a first clamping portion 302 clamped to a first fork inside the transmission housing, and a first cavity 303 for accommodating the second sphere 202. The first clamping portion 302 and the first cavity 303 are respectively connected to the first connecting portion 301, and the first clamping portion 302 and the first cavity 303 are perpendicular to each other. Limiting wings 5 are symmetrically provided on both sides of the connection between the first connecting portion 301 and the first cavity 303. A stop block 6 is provided at the end of the limiting wing 5, and the stop block 6 can abut against the side of the second control member 4.

[0034] In this embodiment, the first clamping portion 302 includes a first cylinder and a connecting column connected to the first cylinder. The connecting column is connected to the first connecting portion 301. The first cavity 303 includes a first square column body. A first accommodating groove that penetrates through both ends is provided in the first square column body, and the second sphere 202 can be located in the first accommodating groove.

[0035] As Figure 4As shown in the figure, the second control member 4 includes a second connecting portion 401 rotatably connected to the housing 1, a second engaging portion 402 engaged with the second shift fork in the transmission housing, and a second cavity 403 for accommodating the second sphere 202. The second engaging portion 402 and the second cavity 403 are respectively connected to the second connecting portion 401, and the second engaging portion 402 and the second cavity 403 are perpendicular to each other. The stopper 6 can abut against the side of the second connecting portion 401. In this embodiment, the second engaging portion 402 is a second cylinder, the second cavity 403 includes a second square column, and a second accommodating groove penetrating through both ends is provided in the second square column. The second sphere 202 can be located in the second accommodating groove.

[0036] In this embodiment, the first control member 3 is close to the inner wall of the housing 1. The second connecting portion 401 is located outside the first connecting portion 301. The first connecting portion 301 is attached to and can coincide with the second connecting portion 401. A first connecting hole is provided on the first connecting portion 301, and a second connecting hole is provided on the second connecting portion 401. The first connecting hole and the second connecting hole coincide. The second connecting portion 401 and the first connecting portion 301 are rotatably connected to the housing 1 through the first connecting hole and the second connecting hole. The first connecting portion 301 can rotate relative to the second connecting portion 401 and the housing 1, and the second connecting portion 401 can rotate relative to the first connecting portion 301 and the housing 1. When the first cavity 303 and the second cavity 403 are attached, the center points of the first engaging portion 302, the second engaging portion 402, and the first connecting portion 301 are collinear, as Figure 6 shown, the shift lever 2 is located between the first cavity 303 and the second cavity 403. The lower end of the second cavity 403 faces the first cavity 303, and the upper end of the second cavity 403 is located above the first cavity 303.

[0037] As Figure 5 、 7 shown, the first limiting member 7 is located outside the second control member 4 and abuts against and limits the outer surface of the second connecting portion 401. The first limiting member 7 includes a third connecting portion and fourth connecting portions symmetrically arranged on both sides of the end of the third connecting portion. The third connecting portion and the fourth connecting portions are connected. A third connecting hole is provided on the third connecting portion. The third connecting hole and the second connecting hole coincide. The first limiting member 7 is fixedly connected to the housing 1 through the third connecting hole and the fourth connecting portions.

[0038] As Figure 3 shown, in this embodiment, the lower surface of the first cylinder is located above the upper surface of the third connecting portion to ensure that the rotation of the first control member 3 is not restricted. The second cylinder is located outside the third connecting portion.

[0039] Shift operation instructions:

[0040] As Figure 1 、 3As shown in FIGS. 3 and 4, when the first connecting portion 301 and the second connecting portion 401 overlap, the first cavity 303 and the second cavity 403 face each other, the shift lever 2 is in the neutral position. When the shift lever 2 is turned to the left, the second sphere 202 is located in the first cavity 303, and the second control member 4 remains stationary. Hold the shift lever 2 and drive the shift lever 2 forward. The shift lever 2 controls the first control member 3 to rotate counterclockwise through the first cavity 303. The first control member 3 controls the first shift fork located in the transmission housing to move straight up through the first engaging portion 302 to achieve first gear output. The block 6 on one of the limiting wings 5 on the first control member 3 abuts against the second connecting portion 401;

[0041] Hold the shift lever 2 and drive the shift lever 2 backward to return to the initial position. The shift lever 2 controls the first control member 3 to rotate clockwise through the first cavity 303. The shift lever 2 is in the neutral position;

[0042] Hold the shift lever 2 and drive the shift lever 2 backward. The shift lever 2 controls the first control member 3 to rotate clockwise through the first cavity 303. The first control member 3 controls the first shift fork located in the transmission housing to move straight down through the first engaging portion 302 to achieve reverse gear output. The block 6 on the other limiting wing 5 on the first control member 3 abuts against the second connecting portion 401;

[0043] Hold the shift lever 2 and drive the shift lever 2 forward to return to the initial position. The shift lever 2 controls the first control member 3 to rotate counterclockwise through the first cavity 303. The shift lever 2 is in the neutral position;

[0044] Hold the shift lever 2 and turn it to the right. The second sphere 202 is located in the second cavity 403, and the first control member 3 remains stationary. Hold the shift lever 2 and drive the shift lever 2 backward. The shift lever 2 controls the second control member 4 to rotate clockwise through the second cavity 403. The second control member 4 controls the second shift fork located in the transmission housing to move straight up through the second engaging portion 402 to achieve second gear output. Hold the shift lever 2 and drive the shift lever 2 forward to return to the initial position. The shift lever 2 controls the second control member 4 to rotate counterclockwise through the second cavity 403. The shift lever 2 is in the neutral position;

[0045] Hold the shift lever 2 and drive the shift lever 2 forward. The shift lever 2 controls the second control member 4 to rotate counterclockwise through the second cavity 403. The second control member 4 controls the second shift fork located in the transmission housing to move straight down through the second engaging portion 402 to achieve third gear output.

[0046] The above embodiments are only the preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantive changes and substitutions made by those skilled in the art based on the present invention fall within the scope of protection required by the present invention.

Claims

1. A gearbox shift mechanism, comprising a housing, characterized in that: The invention also includes a shift lever, a first control member, and a second control member. One end of the shift lever is located outside the shell, and the other end can extend into the first control member or the second control member. The middle part of the shift lever is rotatably connected to the shell, the first control member can fit with the second control member, the first control member and the second control member are both rotatably connected to the shell, the first control member is located between the second control member and the shell, and limiting wings are symmetrically provided on both sides of the first control member. A stop block is provided at the end of the limiting wing, and the stop block can abut against the side of the second control member.

2. The gearbox shift mechanism according to claim 1, characterized in that: The first control member includes a first connecting portion rotatably connected to the shell, a first clamping portion clamped to the first shift fork in the gearbox case, and a first cavity for accommodating the end of the shift rod, the first clamping portion and the first cavity are respectively connected to the first connecting portion, and the first clamping portion and the first cavity are perpendicular to each other, and the limiting wings are respectively located on both sides of the connection between the first connecting portion and the first cavity.

3. The gearbox shifting mechanism according to claim 2, characterized in that: The second control member includes a second connecting portion rotatably connected to the shell, a second clamping portion clamped to a second shift fork in the gearbox case, and a second cavity for accommodating an end of a shift rod, the second clamping portion and the second cavity are respectively connected to the first connecting portion, and the second clamping portion and the second cavity are perpendicular to each other, and the block can abut against a side edge of the second connecting portion.

4. The gearbox shifting mechanism according to claim 3, characterized in that: The first connection part is fitted with the second connection part, the first connection part is provided with a first connection hole, the second connection part is provided with a second connection hole overlapping with the first connection hole, the second connection part and the first connection part are rotatably connected to the shell through the first connection hole and the second connection hole, the first connection part can be rotated relative to the second connection part and the shell, the second connection part can be rotated relative to the first connection part and the shell, when the first cavity and the second cavity are fitted, the center point of the first clamping part, the center point of the second clamping part and the center point of the first connection part are collinear, the shift lever is located between the first cavity and the second cavity, the lower end of the second cavity is opposite to the first cavity, and the upper end of the second cavity is located above the first cavity.

5. The gearbox shifting mechanism according to claim 1, characterized in that: It also includes a first limiting member for limiting the position of the second control member, the first control member is close to the inner wall of the shell, the first control member can be fitted with the second control member, the second control member is located outside the first control member, the first limiting member is located outside the second control member and abuts against the outer surface of the second control member to limit the position, and the first limiting member is fixedly connected to the shell.

6. The gearbox shifting mechanism according to claim 1, characterized in that: A first sphere is provided in the middle of the shift lever, a through hole is provided in the shell, and the shift lever is rotatably connected to the shell through the first sphere and the through hole.

7. The gearbox shift mechanism according to claim 1, characterized in that: A second sphere is disposed at one end of the shift lever that can extend into the first control member.

8. The gearbox shifting mechanism according to claim 1, characterized in that: A third sphere is arranged at one end of the shift lever away from the housing.

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