Tractor gearbox gear locking parking independent control structure

Abstract

The utility model discloses an independent control structure for gear locking and parking of a tractor gearbox, and belongs to the field of tractor gearbox design. The structure comprises a box body, a shaft assembly, a parking control arm, a swing arm position spring, a cam shaft, a driving spring, a separation plate, a toothed plate and a stop gear. The cam shaft is driven to rotate through the independently-arranged parking control arm, the toothed plate is pushed to be meshed with or separated from the stop gear through the driving inclined face of the cam shaft, and parking and releasing are achieved. The parking function is separated from the gear lever, the swing angle of the gear lever is effectively reduced, hands or legs are prevented from being collided during operation of a driver, and operation safety and comfort are improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to tractor gearbox design field, concretely relates to a tractor gearbox gear lock dead parking independent control structure. BACKGROUND

[0002] At present, the small and medium-sized tractor gearbox generally adopts the floor blocking gear lever design form, the parking structure and the gear shifting structure share a gear lever control installed on the gearbox, the gear lever has three positions when selecting gears: the parking position, the first and third gear position, the second and fourth gear position, the horizontal swing angle is large, is limited by the cab space, and the driver is easy to knock the hands or legs when operating, and there are safety hazards and operation inconvenience problems. CONTENT OF UTILITY MODEL

[0003] In view of the problems in the prior art, the utility model provides an independent parking control structure, which is no longer controlled by the gear lever, that is, the gear lever selects the gears and cancels the parking position, only two positions are reserved, and the gear lever swing angle can be reduced, thereby solving the problem that the driver is easy to knock the hands or legs when operating the gear lever.

[0004] A tractor gearbox gear lock dead parking independent control structure, comprising:

[0005] The shaft assembly is rotatably connected with the gearbox body, one end of the shaft assembly penetrating out of the gearbox body is fixedly connected with a parking control arm, the other end penetrating into the gearbox body is fixedly connected with one end of a swing arm, a pin shaft is fixedly connected with the free end of the swing arm, the pin shaft penetrates through the sleeve hole formed in the end of the driving spring and the long hole formed in the upper end of the separation plate;

[0006] The lower end of the separation plate and the other arm of the driving spring are assembled on the pin fixedly connected with the free end of the cam body of the cam shaft, and the shaft body of the cam shaft is rotatably connected with the gearbox body;

[0007] One end of the tooth plate is rotatably connected with a tooth plate fixing shaft, and the tooth plate fixing shaft is installed in the gearbox; the tooth plate is located between the cam shaft and the stop gear, the plate body of the tooth plate is rotatably connected with a rolling sleeve on the side facing the cam shaft, and a rack is formed on the other side facing the stop gear, and a driving slope is formed on the surface of the cam body of the cam shaft; under the elastic force of the tooth plate return spring, the driving slope of the cam shaft is always in rolling abutment with the rolling sleeve, and the tooth plate is turned around the tooth plate fixing shaft so that the rack thereof can be engaged or disengaged with the stop gear.

[0008] Further, the parking control arm is provided with a swing arm position spring, a middle hole of the swing arm position spring is sleeved on the shaft assembly, one arm of the swing arm position spring is limitedly installed on the fixed plate, and the other arm abuts against the parking control arm; the fixed plate is fixedly connected to the box body, and the fixed plate is welded with a limiting pin one and a limiting pin two; the free end of the parking control arm is located between the limiting pin one and the limiting pin two, and in the driving state, the parking control arm is kept in abutment with the limiting pin two under the elastic force of the swing arm position spring.

[0009] Further, the top end of the pin shaft on the swing arm is provided with a anti-dropping clamp to prevent the driving spring and the separation plate from being separated.

[0010] Further, the middle hole of the gear plate return spring is sleeved on the gear plate fixing shaft, one arm of the gear plate return spring is limitedly fixed on the box body, and the other arm abuts against the gear plate.

[0011] Further, the lower end of the separation plate is assembled and connected with the pin fixed on the free end of the cam body of the cam shaft through the pin hole and the sleeve hole formed on the other arm end of the driving spring.

[0012] Further, the top end of the pin fixed on the free end of the cam body is provided with an anti-dropping clamp to prevent the lower end of the separation plate and the driving spring from being separated.

[0013] Further, the driving spring is a torsion spring, and the middle hole center of the driving spring, the shaft center of the pin shaft on the swing arm and the shaft center of the pin on the free end of the cam body are respectively located at three vertices of a triangle.

[0014] Further, the triangle is an equilateral triangle.

[0015] The utility model discloses a simple structure and reliable performance, separate the parking function from the gear lever, effectively reduce the swing angle of gear lever, avoid the driver to knock the hand or leg when operating, improve the control safety and comfort. BRIEF DESCRIPTION OF DRAWINGS

[0016] The drawings that form a part of the present utility model are used to provide further understanding of the present utility model, and the illustrative embodiments of the present utility model and the description thereof are used to explain the present utility model, and do not constitute improper limitation on the present utility model, and other related drawings can be obtained by the drawings without creative labor for the ordinary skill in the art.

[0017] Figure 1 It is a structural schematic diagram of the utility model outside the gearbox;

[0018] Figure 2 It is a structural schematic diagram of the utility model inside the gearbox;

[0019] Figure 3The explosion map of the operation structure of the utility model;

[0020] Figure 4 The three-dimensional schematic view of the camshaft;

[0021] Figure 5 It is the reference view that the camshaft bevel and the rolling sleeve abut.

[0022] The reference signs in the drawing: box body 1, parking control arm 2, shaft assembly 3, swing arm position spring 4, limit pin one 5, fixed plate 6, limit pin two 7, separation plate 8, drive spring 9, support plate 10, camshaft 11, rolling sleeve pin shaft 12, rolling sleeve 13, toothed plate 14, toothed plate return spring 15, toothed plate fixing shaft 16, stop gear 17, drive bevel 18.

[0023] Shaft body 111, cam body 112, rack 141, swing arm 31, pin shaft 311, long hole 81. Specific embodiments

[0024] It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict.

[0025] As shown in the drawing, Figure 1 From the outside of the gearbox, the shaft assembly 3 is rotatably connected with the box body 1, and the end of the shaft assembly 3 penetrating out of the gearbox is fixedly connected with the parking control arm 2; the middle hole of the swing arm position spring 4 is sleeved on the shaft assembly 3, one arm of the swing arm position spring 4 is limitingly installed on the fixed plate 6, and the other arm abuts against the parking control arm 2; the fixed plate 6 is fixedly connected with the box body 1, and the fixed plate 6 is welded with the limit pin one 5 and the limit pin two 7; the free end of the parking control arm 2 is located between the limit pin one 5 and the limit pin two 7, and in the driving state, the parking control arm 2 is kept abutting against the limit pin two 7 under the elastic force of the swing arm position spring 4.

[0026] As shown in the drawing, Figure 2 And Figure 3 From the inside of the gearbox, the end of the shaft assembly 3 penetrating into the inside of the box body 1 is fixedly connected with one end of the swing arm 31, the free end of the swing arm 31 is fixedly connected with the pin shaft 311, the pin shaft 311 penetrates through the sleeve hole formed in the arm end of the drive spring 9 and the long hole 81 formed in the upper end of the separation plate 8, and the top end of the pin shaft 311 is provided with an anti-escape clamp to prevent the drive spring 9 and the separation plate 8 from being disconnected with the pin shaft 311.

[0027] The pin hole formed in the lower end of the separation plate 8 and the sleeve hole formed in the other arm end of the drive spring 9 are assembled on the pin fixedly connected with the free end of the cam body 112 of the camshaft 11. Preferably, the top end of the pin fixedly connected with the free end of the cam body 112 is provided with an anti-escape clamp to prevent the lower end of the separation plate 8 and the drive spring 9 from being disconnected.

[0028] The shaft body 111 of the camshaft 11 is rotatably connected in the box body 1; preferably, in order to facilitate installation and maintenance, the outer end of the camshaft 11 is blocked and supported by the support plate 10 fixed outside the box body 1.

[0029] One end of the toothed plate 14 is rotatably connected to the toothed plate fixing shaft 16, and the toothed plate fixing shaft 16 is installed in the box body 1;

[0030] The middle hole of the toothed plate return spring 15 is sleeved on the toothed plate fixing shaft 16, one arm of the toothed plate return spring 15 is limitingly fixed on the box body 1, and the other arm abuts against the toothed plate 14;

[0031] The plate body of the toothed plate 14 is located between the cam body 112 of the camshaft 11 and the stop gear 17, the stop gear 17 is coaxially fixed with the second shaft of the gearbox, the plate body of the toothed plate 14 is rotatably connected with the roller sleeve 13 through the roller sleeve pin shaft 12 on the side facing the camshaft 11, the other side of the plate body of the toothed plate 14 facing the stop gear 17 is formed with a rack 141 capable of meshing with the stop gear 17, and the surface of the cam body 112 of the camshaft 11 is formed with a driving slope 18; under the elastic force of the toothed plate return spring 15, the driving slope 18 of the camshaft 11 always rolls and abuts against the roller sleeve 13, and the toothed plate 14 can be flipped around the toothed plate fixing shaft 16 so that the rack 141 thereof can mesh with or be separated from the stop gear 17.

[0032] Working principle:

[0033] Parking process: when parking is needed, the parking control arm 2 is counterclockwise rotated, the shaft assembly 3 is rotated, the pin shaft thereon pushes the driving spring 9 to move downward, the driving spring 9 in turn pushes the camshaft 11 to counterclockwise rotate (as viewed from the outside of the gearbox). The slope 18 on the camshaft 11 pushes the roller sleeve 13, so that the toothed plate 14 moves towards the stop gear 17.

[0034] If the rack 141 of the toothed plate 14 is aligned with the tooth groove on the stop gear 17 at this time, the rack 141 of the toothed plate 14 will be smoothly inserted and locked with the stop gear 17, and then the rear wheel is locked through the transmission chain of the second shaft, so as to realize the parking function. In this process, the separation plate 8 and the driving spring 9 move synchronously.

[0035] If the rack 141 of the toothed plate 14 is not aligned with the tooth groove of the stop gear 17, the rack 141 of the toothed plate 14 cannot completely enter the tooth groove. At this time, the pin shaft 311 on the shaft assembly 3 moves relatively in the long hole 81 of the separation plate 8, and the driving spring 9 is kept in a larger deformed state, storing elastic energy. When the driver releases the brake pedal, the tractor slightly slides, the stop gear 17 is slightly rotated, and when the tooth groove is aligned with the rack of the toothed plate 14, the toothed plate 14 rapidly moves towards the stop gear 17 under the elastic force of the driving spring 9, so as to realize complete meshing and complete parking. At the same time, the separation plate 8 also moves downward to the position.

[0036] Separation process: when the need to remove the parking, clockwise rotation parking control arm 2, the pin shaft 311 on the shaft assembly 3 will drive the drive spring 9 and separation plate 8 together to move upwards, so as to drive the camshaft 11 clockwise (from the outside of the gearbox). Under the action of the tooth plate return spring 15, the roller 13, roller pin 12 and tooth plate 14 as a whole to the outside, so that the tooth plate 14 and the stop gear 17 is separated, the parking state is removed.

[0037] The present application adds an independent parking control mechanism, separates the parking function from the gear setting of the gear lever, effectively reduces the lateral swing angle of the gear lever and the required layout space, fundamentally solves the problem of the driver knocking hands and legs when operating, improves the operation comfort and safety.

[0038] The rotation control of the parking control arm 2 can be driven and controlled by a flexible shaft and a pull rod, and the specific transmission connection structure is a conventional technology, which will not be described herein.

[0039] The above is only a preferred embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A tractor gearbox gear lockup park independent control structure, characterized by, The utility model relates to a parking control arm and parking brake release mechanism, including: The shaft assembly (3) is rotatably connected with the gearbox body (1), one end of the shaft assembly (3) is fixedly connected with the parking control arm (2) and the other end is fixedly connected with one end of the swing arm (31), the free end of the swing arm (31) is fixedly connected with the pin shaft (311), the pin shaft passes through the sleeve hole formed in the arm end of the driving spring (9) and the long hole (81) formed in the upper end of the separation plate (8); The lower end of the separation plate (8) and the other arm of the driving spring (9) are assembled on the pin fixedly connected with the free end of the cam body (112) of the cam shaft (11), the shaft body of the cam shaft is rotatably connected with the gearbox body; One end of the toothed plate (14) is rotatably connected with the toothed plate fixing shaft (16), the toothed plate fixing shaft (16) is installed in the gearbox body; the toothed plate (14) is located between the cam shaft (11) and the stop gear (17), the side of the plate body of the toothed plate (14) facing the cam shaft (11) is rotatably connected with the rolling sleeve (13), the other side facing the stop gear (17) is formed with the rack (141), the surface of the cam body (112) of the cam shaft is formed with the driving slope (18); under the elastic force of the toothed plate return spring (15), the driving slope of the cam shaft is always in rolling abutment with the rolling sleeve, and the toothed plate (14) is turned around the toothed plate fixing shaft (16) so that the rack (141) can be engaged with or disengaged from the stop gear (17).

2. A tractor gearbox gear lock-park independent control structure as claimed in claim 1, characterized in that: The parking control arm (2) is provided with the swing arm position spring (4), the middle hole of the swing arm position spring (4) is sleeved on the shaft assembly (3), one arm of the swing arm position spring (4) is limitingly installed on the fixed plate (6), the other arm abuts against the parking control arm (2); the fixed plate (6) is fixedly connected with the gearbox body (1), the fixed plate is welded with the limiting pin one (5) and the limiting pin two (7); the free end of the parking control arm (2) is located between the limiting pin one and the limiting pin two, and in the driving state, the parking control arm is kept in abutment with the limiting pin two under the elastic force of the swing arm position spring.

3. A tractor gearbox gear lock-park independent control structure as claimed in claim 1, characterized in that: The top end of the pin shaft (311) on the swing arm (31) is provided with the anti-disengagement clamp to prevent the driving spring (9) and the separation plate (8) from disengaging.

4. A tractor gearbox gear lock-park independent control structure as claimed in claim 1, characterized in that: The middle hole of the toothed plate return spring (15) is sleeved on the toothed plate fixing shaft (16), one arm of the toothed plate return spring is limitingly fixed on the gearbox body, and the other arm abuts against the toothed plate (14).

5. A tractor gearbox gear lock-up park independent control structure as claimed in claim 1, characterized in that: The lower end of the separation plate (8) is assembled with the pin fixedly connected with the free end of the cam body (112) of the cam shaft (11) through the pin hole formed in the lower end and the sleeve hole formed in the other arm end of the driving spring (9).

6. A tractor gearbox gear lock-up park independent control structure as claimed in claim 5, characterized in that: The top end of the pin fixedly connected with the free end of the cam body is provided with the anti-disengagement clamp to prevent the lower end of the separation plate and the driving spring from disengaging.

7. A tractor transmission gear lock-park independent control structure as claimed in claim 1 wherein: The driving spring (9) is a torsion spring, the center of the middle hole of the driving spring (9), the shaft center of the pin shaft on the swing arm (31) and the shaft center of the pin on the free end of the cam body (112) are respectively located on the three vertices of the triangle.

8. A tractor gearbox gear lock-up park independent control structure as claimed in claim 7, characterized in that: The triangle is an equilateral triangle.

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