CN220622711U - Novel parking structure of crawler gearbox - Google Patents

Abstract

The utility model discloses a novel crawler gearbox parking structure, which comprises an input shaft and an input driving gear, wherein a combined spline seat is arranged on the input shaft at one side of the input driving gear, a jaw clutch is arranged at one side of the combined spline seat, a jaw clutch with the same height is also arranged at one side of the input driving gear, which is close to the combined spline seat, a friction plate assembly is arranged on the input shaft at the other side of the input driving gear, and the input driving gear freely rotates relative to the input shaft under the condition that the input driving gear is not combined with the combined spline seat and the friction plate assembly; according to the utility model, the uniformly distributed contour jaw clutches are processed on one side of the combined spline seat, and the uniformly distributed contour jaw clutches are processed on one side of the input driving gear close to the combined spline seat, so that the driving parking brake can be realized without cutting off power input, and the diesel engine is ensured to keep stable rotating speed.

Description

Novel parking structure of crawler gearbox

Technical Field

The utility model relates to the technical field of crawler gearboxes, in particular to a novel crawler gearbox parking structure.

Background

The main stream crawler-type agricultural machinery gearbox in the market is in a parking state, parking braking is realized by turning the steering shifting fork through turning the steering braking seats on two sides, but the main stream crawler-type agricultural machinery gearbox has obvious defects, the parking device is generally prone to be removed by a user due to the fact that the parking spring moment is large due to the fact that the parking braking seats are connected with the steering braking clutch, and the vehicle can still continue to move forward under the huge mass and inertia effects of the crawler-type harvester, so that potential safety hazards exist. There is therefore a need to develop a new track gearbox parking structure. To solve the objective problems.

Disclosure of Invention

In order to solve the problems in the prior art, the utility model provides a novel crawler gearbox parking structure with reasonable structural design.

The technical scheme of the utility model is as follows:

the utility model provides a novel track gearbox parking structure, includes input shaft and input driving gear, be equipped with on the input shaft of input driving gear one side and combine the splined seat, it is equipped with contour tooth clutch to combine splined seat one side, input driving gear is close to and combines splined seat one side also to be equipped with contour tooth clutch, be equipped with the friction disc subassembly on the input shaft of input driving gear opposite side, input driving gear is under the condition not combining splined seat, friction disc subassembly, relative input shaft free rotation.

Further, the friction plate assembly comprises a thrust ring, a friction plate separation plate, a friction plate and a thick bottom plate, and an external spline is processed on one side of the input driving gear, which is close to the friction plate assembly;

further, a spring reset assembly is arranged on one side, close to the friction plate assembly, of the input shaft, and a plane needle bearing is arranged between the input driving gear and the spring reset assembly.

Further, the spring reset component and the friction plate component are arranged in the parking brake seat, a cross clamping groove is processed at the tail end of the parking brake seat, and the friction plate separation plate and the thick negative plate are fixed with the parking brake seat through the cross clamping groove.

Further, the spring return assembly comprises a return spring, an outer spring seat and an inner spring seat, and the return spring is arranged between the outer spring seat and the inner spring seat.

Further, the friction plate is provided with internal splines of the same size and meshed with the input driving gear.

Furthermore, the external spline of the input driving gear is radially provided with a lubrication hole, so that the sliding bimetallic bearing in the input driving gear is fully lubricated and cooled, and the ablation risk is reduced.

Further, the plane needle roller bearing is abutted against the spring inner seat, and the spring inner seat is provided with a positioning step to limit the relative movement of the plane needle roller bearing.

The beneficial effects of the utility model are as follows:

according to the utility model, the uniformly distributed contour jaw clutches are processed on one side of the combined spline seat, and the uniformly distributed contour jaw clutches are processed on one side of the input driving gear close to the combined spline seat, so that the driving parking brake can be realized without cutting off power input, and the diesel engine is ensured to keep stable rotating speed.

Drawings

FIG. 1 is a parking brake state diagram of a crawler belt gearbox of the present utility model;

FIG. 2 is a power-on state diagram of the track gearbox of the present utility model;

FIG. 3 is a schematic view of a split fork of a track gearbox of the present utility model;

in the figure: 1. an input shaft; 2. combining a spline seat; 3. separating the shifting fork; 4. a spacer bush; 5. an input drive gear; 6. a thrust collar; 7. a friction plate separator plate; 8. a friction plate; 9. a thick bottom sheet; 10. sliding the bimetal bearing; 11. a planar needle bearing; 12. a return spring; 13. a spring inner seat; 14. a spring outer seat; 15. a parking brake seat; 16. sealing cover; 17. a left box body; 18. a main transmission assembly; 19. a driven gear; 20. a right box body; 501. a separation handle; 502. an O-ring; 503. limiting the sealing cover; 504. separating the rotating shaft; 505. separating the shifting fork; 506. a limit screw plug; 507 separate the dials.

Detailed Description

The utility model is further described below with reference to the drawings.

As shown in fig. 1-2, in a novel crawler gearbox parking structure, power input is combined with a combined spline seat 2 on an input shaft 1 through involute splines from an interface end of a right box body 20 via the input shaft 1, axial limiting is fixed through a clamp spring groove and a spacer bush 4 of the input shaft 1, uniformly distributed contour jaw clutches are processed on one side of the combined spline seat 2, and an input driving gear 5 freely rotates relative to the input shaft 1 under the condition that the input driving gear is not combined with the combined spline seat 2 and a friction plate assembly.

The input driving gear 5 is also provided with evenly distributed contour jaw clutches on one side close to the combined spline seat 2, which can bear large transmission torque and does not generate friction heat. The external spline is processed on one side of the friction plate assembly, the friction plate assembly consisting of the thrust ring 6, the friction plate separation plate 7, the friction plate 8 and the thick bottom plate 9 is penetrated, the separation shifting fork 3 is moved to push the input driving gear 5 to compress the friction plate assembly, the rotation of the input driving gear 5 is locked, the sliding of the input driving gear 5 and the driven gear 19 still keep the meshed state, the driven gear 19 is combined with the main speed changing assembly 18 through the spline, so that the transmission flow of the gearbox is locked, and the friction plate assembly is tightly fixed with the parking brake seat 15 through compressing. The parking brake seat 15 is fixedly arranged on a mounting hole of the left box body 17, a cross clamping groove is formed in the tail end of the parking brake seat, and the friction plate partition plate 7 and the thick bottom plate 9 can be fixed with the parking brake seat 15 through the cross clamping groove. The driving parking braking can be realized without cutting off power input, and the diesel engine is ensured to keep stable rotating speed.

When the separation shifting fork is in a loose-proof state, the separation shifting fork is limited at the position of the clamp spring groove of the input shaft 1, which is close to the left box body, and is clamped on the spring outer seat 14, the plane needle bearing 11 is pushed to prop against the sliding jaw joint part of the input driving gear 5 to be meshed with the combined spline seat 2 through the action force of the spring, meanwhile, the sliding gear is completely meshed with the driven gear 19, and the power flow is transmitted downwards through the gear, so that the direct power flow transmission is realized.

The working principle is described by taking a driving parking braking state (shown in fig. 1) as an example:

the separation shifting fork 3 is rotated to push the input driving gear 5 to be separated from the jaw power of the combined spline seat 2, the input driving gear 5 pushes the thrust ring 6 to further compress the friction plate separation plate 7 and the friction plate 8, the friction plate 8 is processed with the same-size internal spline to be meshed with the input driving gear 5, the external spline of the input driving gear 5 is radially processed with a lubrication hole, so that a sliding bimetallic bearing 10 in the input driving gear 5 is fully lubricated and cooled to reduce ablation risk, the end face of the input driving gear 5 abuts against a plane needle bearing 11 under the action of spring force to roll with the end face of the gear to reduce mutual friction and abrasion between parts, the plane needle bearing 11 abuts against a spring inner seat 13, the spring inner seat is processed to position a step, the plane needle bearing 11 is limited to relatively move, and then the spring force of the parking return spring 12 abuts against a deep groove ball bearing processed in the parking brake seat 15. I.e. the parking brake holder 15 is fixed to the left housing 17 by means of screws.

The power flow path is: power input (HST) → input shaft 1→ input drive gear 5→ friction plate 8→friction plate separator 7→thick bottom plate 9→parking brake seat 15→lock stop force flow transmission.

The working principle is described by taking the power source combination state (shown in fig. 2) as an example:

under the action of the spring force of the return spring 12, the separation shifting fork slides to be meshed with the jaw of the combined spline seat 2, and is combined with the input driving gear 5 through a spline, at the moment, the friction plate assembly is in a loose-proof state, and the input driving gear 5 is meshed with the driven gear 19, so that the gradual transmission of power flow is realized.

FIG. 3 shows a crawler gearbox split fork, comprising a split handle 501, an O-ring 502, a limit sealing cover 503, a split rotating shaft 504, a split fork 505, a limit screw plug 506 and a split fork block 507; the rotary separation handle 501 is connected with the rotary separation rotating shaft 504 through a spline, the separation shifting fork 505 is connected through a set screw, and the separation shifting block 507 pushes the clamping groove on the input driving gear 5 to slide.

The above embodiments are only preferred embodiments of the present utility model, and are not limiting to the technical solutions of the present utility model, and any technical solution that can be implemented on the basis of the above embodiments without inventive effort should be considered as falling within the scope of protection of the patent claims of the present utility model.

Claims (8)

1. The utility model provides a novel track gearbox parking structure, includes input shaft (1) and input driving gear (5), its characterized in that, be equipped with on input shaft (1) of input driving gear (5) one side and combine spline seat (2), it is equipped with the jaw clutch to combine spline seat (2) one side, input driving gear (5) are close to and combine spline seat (2) one side to be equipped with the jaw clutch of equiheight, be equipped with friction disc subassembly on input shaft (1) of input driving gear (5) opposite side, input driving gear (5) are under the condition that does not combine with combination spline seat (2), friction disc subassembly, relative input shaft (1) free rotation.

2. The novel crawler gearbox parking structure according to claim 1, wherein the friction plate assembly comprises a thrust ring (6), a friction plate separation plate (7), a friction plate (8) and a thick bottom plate (9), and an external spline is machined on one side of the input driving gear (5) close to the friction plate assembly.

3. The novel crawler gearbox parking structure according to claim 2, wherein a spring reset assembly is arranged on one side, close to the friction plate assembly, of the input shaft (1), and a plane needle bearing (11) is arranged between the input driving gear (5) and the spring reset assembly.

4. The novel crawler gearbox parking structure according to claim 3, wherein the spring reset assembly and the friction plate assembly are arranged in a parking brake seat (15), a cross clamping groove is formed in the tail end of the parking brake seat (15), and the friction plate separation plate (7) and the thick bottom plate (9) are fixed with the parking brake seat (15) through the cross clamping groove.

5. A novel track gearbox parking structure according to claim 3, characterized in that the spring return assembly comprises a return spring (12), an outer spring seat (14) and an inner spring seat (13), wherein the return spring (12) is arranged at a position between the outer spring seat (14) and the inner spring seat (13).

6. A novel track gearbox parking structure according to claim 2, characterized in that the friction plate (8) is machined with internal splines of the same size to engage with the input drive gear (5).

7. The novel crawler gearbox parking structure according to claim 1, wherein the external spline of the input driving gear (5) is radially provided with a lubrication hole, so that a sliding bimetallic bearing (10) arranged in the input driving gear (5) is sufficiently lubricated and cooled to reduce ablation risk.

8. The novel crawler gearbox parking structure according to claim 5, wherein the plane needle roller bearing (11) abuts against the spring inner seat (13), and the spring inner seat (13) is provided with a positioning step to limit the relative movement of the plane needle roller bearing (11).