Gearbox gear shifting structure

Abstract

The utility model relates to the technical field of mini-tiller gearboxes, and discloses a gearbox gear shifting structure which comprises a first limiting shaft and a second limiting shaft which are parallel in different planes, a plurality of sets of connecting assemblies are arranged on the first limiting shaft, each connecting assembly comprises a connecting piece and a ball which are fixedly connected with a driving shaft in a gearbox, and the connecting piece is in sliding fit with the first limiting shaft. The connecting piece is rotationally connected with the balls, a plurality of multi-peak first annular grooves are formed in the second limiting shaft, and the balls can slide on the corresponding first annular grooves; the second limiting shaft is provided with a limiting assembly used for controlling the second limiting shaft to rotate and limit, the limiting assembly comprises a handle used for controlling the second limiting shaft to rotate in the vertical plane in the circumferential direction and a limiting piece used for limiting the handle after rotation, the handle is connected with the second limiting shaft, and the handle and the second limiting shaft are coaxial. According to the gear shifting handle, the distance between the gear shifting handle and an operator can be prevented from being increased during gear shifting, and operation can be convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of micro-tiller gearboxes, and particularly to a gear-shifting structure of a gearbox. Background Art

[0002] When shifting gears of a ride-on micro-tiller, controlling the gear-shifting handle to move forward or backward drives the fork to move on the main shaft of the gearbox, thereby driving the shifting gear to move on the main shaft and engage with the corresponding gear to achieve the output of the corresponding gear position. When an 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 moves back and forth. When a high gear position output is required, the gear-shifting handle needs to move forward in a direction away from the operator, and the distance between the gear-shifting handle and the operator increases. 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 structure of a gearbox, which can avoid increasing the distance between the gear-shifting handle and the operator during gear shifting and can facilitate the operation.

[0004] The technical solution adopted by the utility model is as follows: The gear-shifting structure of the gearbox includes a first limiting shaft and a second limiting shaft that are parallel in different planes. A plurality of connecting components are arranged on the first limiting shaft. The connecting component includes a connecting piece connected to the main shaft in the gearbox and a ball. The connecting piece is slidably matched with the first limiting shaft, and the connecting piece and the ball are rotatably connected. A plurality of multi-peak first annular grooves are arranged on the second limiting shaft, and the ball can slide on the corresponding first annular groove;

[0005] The second limiting shaft is provided with a limiting component for controlling the rotation and limiting of the second limiting shaft. The limiting component includes a handle for controlling the circumferential rotation of the second limiting shaft in the vertical plane and a limiting piece for limiting the rotation of the handle after rotation. The handle is connected to the second limiting shaft, and the handle and the second limiting shaft are coaxial. When the handle rotates circumferentially, the second limiting shaft rotates circumferentially, the ball slides to the peak of the first annular groove, the connecting piece is slidably matched with the first limiting shaft, and the connecting piece slides axially along the main shaft in the gearbox and is connected to the gear.

[0006] Explanation: A main shaft is arranged in the gearbox, and a plurality of gears are sleeved on the main shaft. The connecting piece is slidably matched with the main shaft. The first limiting shaft and the second limiting shaft are both located in the gearbox. The first limiting shaft is fixedly connected to the gearbox housing, and the second limiting shaft is installed on the gearbox housing through a bearing.

[0007] Principle of the Technical Solution

[0008] The hand drives the handle to rotate circumferentially. The handle is connected to the second limiting shaft, and the handle and the second limiting shaft are coaxial. The handle drives the second limiting shaft to rotate circumferentially. Since the first annular groove is multi-peak, when the second limiting shaft rotates circumferentially, the ball slides to one of the wave peaks of the first annular groove. The ball drives the connecting piece to slide and cooperate with the first limiting shaft. At the same time, the connecting piece slides axially along the driving shaft and is connected to the gear, so that the gear rotates following the driving shaft to achieve gear shifting.

[0009] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0010] In the present utility model, the design of the circumferential rotation of the vertical plane of the handle, the connection and coaxiality of the handle and the second limiting shaft, and the limiting piece for limiting the rotation of the handle can ensure that when shifting gears, only the circumferential rotation of the vertical plane of the handle needs to be controlled. No matter what gear is shifted to, the distance between the handle and the operator always remains unchanged, which can avoid increasing the distance between the shift handle and the operator's hand during gear shifting and is convenient to operate; the design of the connecting piece, the ball, the first limiting shaft and the second limiting shaft, and the multi-peak first annular groove on the second limiting shaft can ensure that when the second limiting shaft rotates circumferentially, the ball slides to the wave peak of the first annular groove, ensuring that the connecting piece slides axially along the driving shaft and is connected to the gear, so that the gear rotates following the driving shaft to achieve gear shifting.

[0011] As a preferred embodiment of the present utility model, the limiting piece includes a fixed disk fixedly connected to the box body and a limiting disk fixedly connected to the handle. The fixed disk, the limiting disk, the handle and the second limiting shaft are coaxial. One end of the handle passes through the fixed disk and is rotatably connected to the fixed disk. A plurality of limiting holes are provided on the surface of the fixed disk opposite to the limiting disk. The limiting disk is provided with a spring and a limiting ball. One end of the spring is connected to the limiting disk, and the other end is connected to the limiting ball. The limiting ball can abut against the limiting hole.

[0012] In this solution, the vertical plane of the handle rotates circumferentially. Since the limiting disk is fixedly connected to the handle, the handle drives the limiting disk to rotate circumferentially. Since the fixed disk is fixedly connected to the box body, after the limiting disk rotates circumferentially, the limiting ball moves to the next limiting hole, realizing the limitation of the rotated handle, that is, the limitation of the rotated second limiting shaft, ensuring that after gear shifting, the connecting piece remains at the shifted gear position.

[0013] Beneficial effects: The cooperation of the limiting ball, the spring and the limiting hole can limit the rotated handle and limit the rotated second limiting shaft through the handle.

[0014] As a preferred embodiment of the present utility model, a plurality of gear position indicator plates are provided on the surface of the fixed disk away from the limiting disk, and the plurality of gear position indicator plates respectively correspond to the limiting holes.

[0015] As a preferred embodiment of the present utility model, the handle includes a first rotating part and a second rotating part perpendicularly connected to the first rotating part, and the first rotating part is connected to the second limiting shaft.

[0016] As a preferred embodiment of the present utility model, anti-slip stripes are provided on the outer surface of the second rotating part.

[0017] As a preferred embodiment of the present utility model, the connecting assembly further includes a shifting wheel, the connecting member includes an arc part, a first connecting part and a second connecting part, the arc part, the first connecting part and the second connecting part are connected in sequence, the shifting wheel is fixedly connected to the driving shaft in the gearbox, the shifting wheel is provided with a second annular groove, a limiting groove is provided on a pair of opposite side walls of the second annular groove, the arc part is in sliding fit with the bottom of the second annular groove, both ends of the arc part respectively extend into the corresponding limiting grooves, the second connecting part is in sliding fit with the first limiting shaft, and the second connecting part is rotatably connected to a ball.

[0018] Beneficial effects: The arc part is in sliding fit with the bottom of the second annular groove, and both ends of the arc part respectively extend into the corresponding limiting grooves, so that the shifting wheel can rotate following the driving shaft, and at the same time, the arc part, the first connecting part and the second connecting part can also drive the shifting wheel to slide along the axial direction of the driving shaft. Description of the Drawings

[0019] Figure 1 is a schematic structural diagram of the gearbox shifting structure of the present utility model;

[0020] Figure 2 is a schematic structural diagram of another angle of the gearbox shifting structure of the present utility model;

[0021] Figure 3 is a schematic partial structural diagram of the gearbox shifting structure of the present utility model;

[0022] Figure 4 is a schematic structural diagram of yet another angle of the gearbox shifting structure of the present utility model. Detailed Embodiments

[0023] Typical embodiments reflecting 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 rather than for limiting the present utility model.

[0024] 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. It 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.

[0025] The present utility model will be described in detail below with reference to the drawings and in conjunction with embodiments.

[0026] The reference numerals include: first limiting shaft 1, second limiting shaft 2, first annular groove 201, connecting member 3, arc portion 301, first connecting portion 302, second connecting portion 303, ball 4, handle 5, first rotating portion 501, second rotating portion 502, limiting member 6, fixed disk 601, limiting disk 602, limiting hole 603, spring 604, limiting ball 605, gear position indicator plate 7, shift gear 8, second annular groove 801, limiting groove 802.

[0027] As Figures 1-4 shown, the transmission shift structure, as Figure 1 shown, includes a first limiting shaft 1 and a second limiting shaft 2 that are parallel in different planes. The first limiting shaft 1 is fixedly connected to the transmission housing. There are multiple groups of connecting components provided on the first limiting shaft 1. In this embodiment, there are a total of two groups of connecting components.

[0028] As Figure 1 , 3 shown, the connecting component includes a shift gear 8, a connecting member 3, and a ball 4. The shift gear 8 is fixedly connected to the driving shaft inside the transmission. In this embodiment, the shift gear 8 is splined to the driving shaft inside the transmission. The shift gear 8 is provided with a second annular groove 801, and a limiting groove 802 is provided on a pair of opposite side walls of the second annular groove 801.

[0029] As Figure 3 shown, the connecting member 3 includes an arc portion 301, a first connecting portion 302, and a second connecting portion 303. The arc portion 301, the first connecting portion 302, and the second connecting portion 303 are connected in sequence. The arc portion 301 is slidably engaged with the bottom of the second annular groove 801. Both ends of the arc portion 301 extend into the corresponding limiting grooves 802 respectively. The second connecting portion 303 is slidably engaged with the first limiting shaft 1, and the second connecting portion 303 is rotatably connected to the ball 4.

[0030] In this embodiment, the second connecting portion 303 is a cylinder, and the second connecting portion 303 is slidably engaged with the first limiting shaft 1.

[0031] As Figure 2As shown, the second limit shaft 2 is installed on the gearbox housing through bearings. Multiple multi-peak first annular grooves 201 are provided on the second limit shaft 2, and the balls 4 can slide on the corresponding first annular grooves 201. In this embodiment, there are a total of two first annular grooves 201, and the second limit shaft 2 is provided with a limit component for controlling the rotation and limitation of the second limit shaft 2.

[0032] As Figure 1 , 2 shown, the limit component includes a handle 5 for controlling the circumferential rotation of the second limit shaft 2 in the vertical plane and a limiting member 6 for limiting the rotation of the handle 5 after rotation. The handle 5 includes a first rotating portion 501 and a second rotating portion 502 vertically connected to the first rotating portion 501. The first rotating portion 501 is connected to the second limit shaft 2, and the first rotating portion 501 and the second limit shaft 2 are coaxial. The outer surface of the second rotating portion 502 is provided with anti-slip stripes.

[0033] The limiting member 6 includes a fixed disk 601 fixedly connected to the gearbox housing and a limiting disk 602 fixedly connected to the handle 5. The fixed disk 601, the limiting disk 602, and the handle 5 are coaxial. One end of the handle 5 passes through the fixed disk 601 and is rotatably connected to the fixed disk 601. In this embodiment, the second rotating portion 502 is located outside the fixed disk 601, the first rotating portion 501 is fixedly connected to the limiting disk 602, and a plurality of limiting holes 603 are provided on the surface of the fixed disk 601 opposite to the limiting disk 602. In this embodiment, there are a total of five limiting holes. The limiting disk 602 is provided with a spring 604 and a limiting ball 605. One end of the spring 604 is connected to the limiting disk 602, and the other end is connected to the limiting ball 605. The limiting ball 605 can abut against the limiting hole 603.

[0034] A plurality of gear position indicator plates 7 are provided on the surface of the fixed disk 601 away from the limiting disk 602. The plurality of gear position indicator plates 7 correspond to the limiting holes 603 respectively. In this embodiment, there are a total of five gear position indicator plates 7, which are respectively marked with reverse gear R, neutral gear N, first gear, second gear, and third gear in sequence.

[0035] When the handle 5 rotates circumferentially, the second limit shaft 2 rotates circumferentially, the balls 4 slide to the peaks of the first annular grooves 201, and the second connecting portion 303 slides in cooperation with the first limit shaft 1. The connecting member 3 controls the shift wheel 8 to slide axially along the driving shaft in the gearbox and connect with the gear.

[0036] Shifting operation: Place the hand on the second rotating part 502 and rotate it circumferentially. The second rotating part 502 drives the limiting disc 602 to rotate through the first rotating part 501, and at the same time drives the second limiting shaft 2 to rotate through the first rotating part 501, so that the limiting ball 605 moves from the current limiting hole 603 to the next limiting hole 603. At the same time, the ball 4 slides to the peak of one of the first annular grooves 201 on the second limiting shaft 2, so that the second connecting part 303 slides axially along the first limiting shaft 1. The second connecting part 303 drives the shifting wheel 8 to slide axially along the driving shaft and connect with the gear through the first connecting part 302 and the arc part 301, so that the gear sleeved on the driving shaft rotates following the driving shaft, realizing shifting.

[0037] 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-substantial changes and substitutions made by those skilled in the art on the basis of the present invention belong to the scope of protection required by the present invention.

Claims

1. A gearbox shifting structure, comprising a first limiting shaft and a second limiting shaft that are parallel to each other and are skewed, characterized in that: The first limiting shaft is provided with a plurality of connecting components, the connecting components include a connecting piece and a ball connected to the driving shaft in the gearbox, the connecting piece is slidably matched with the first limiting shaft, the connecting piece and the ball are rotatably connected, and the second limiting shaft is provided with a plurality of multi-peak first annular grooves, and the ball can slide on the corresponding first annular grooves; The second limit shaft is provided with a limit assembly for controlling the rotation and limiting of the second limit shaft, the limit assembly includes a handle for controlling the circumferential rotation of the second limit shaft in a vertical plane, and a limit piece for limiting the handle after rotation, the handle is connected to the second limit shaft, the handle and the second limit shaft are coaxial, when the handle rotates circumferentially, the second limit shaft rotates circumferentially, the ball slides to the crest of the first annular groove, the connecting piece is slidably matched with the first limit shaft, the connecting piece slides axially along the driving shaft in the gearbox and is connected to the gear.

2. The gearbox shifting structure according to claim 1, characterized in that: The limiting component includes a fixed plate fixedly connected to the box body and a limiting plate fixedly connected to the handle. The fixed plate, the limiting plate and the handle are coaxial. One end of the handle passes through the fixed plate and is rotatably connected to the fixed plate. A plurality of limiting holes are provided on a side of the fixed plate opposite to the limiting plate. The limiting plate is provided with a spring and a limiting ball. One end of the spring is connected to the limiting plate, and the other end is connected to the limiting ball. The limiting ball can abut against the limiting hole.

3. The gearbox shifting structure according to claim 2, characterized in that: A plurality of gear indicator plates are arranged on a side of the fixed plate away from the limiting plate, and the plurality of gear indicator plates correspond to the limiting holes respectively.

4. The gearbox shifting structure according to claim 1, characterized in that: The handle comprises a first rotating part and a second rotating part vertically connected to the first rotating part, and the first rotating part is connected to the second limiting shaft.

5. The gearbox shifting structure according to claim 4, characterized in that: The outer surface of the second rotating part is provided with anti-slip stripes.

6. The gearbox shifting structure according to claim 1, characterized in that: The connecting assembly also includes a shift wheel, and the connecting member includes an arcuate portion, a first connecting portion and a second connecting portion, the arcuate portion, the first connecting portion and the second connecting portion are connected in sequence, the shift wheel is fixedly connected to the driving shaft in the gearbox, the shift wheel is provided with a second annular groove, and a limiting groove is provided on an opposite side wall of the second annular groove, the arcuate portion is slidably matched with the bottom of the second annular groove, and the two ends of the arcuate portion are respectively extended into the corresponding limiting grooves, the second connecting portion is slidably matched with the first limiting shaft, and the second connecting portion is rotationally connected to the ball.

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