CN218894939U

CN218894939U - Low-speed gear anti-disengagement gear lock for four-wheel drive agricultural vehicle

Info

Publication number: CN218894939U
Application number: CN202222869181.4U
Authority: CN
Inventors: 刘宝辉
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-10-31
Filing date: 2022-10-31
Publication date: 2023-04-21
Anticipated expiration: 2032-10-31

Abstract

The utility model relates to a low-speed gear anti-disengagement lock of a four-wheel drive agricultural vehicle, which comprises a gearbox cover, a gear lever, an auxiliary arm, a main arm, a connecting plate and a spring, wherein the auxiliary gear lever is arranged in an auxiliary gear lever seat on the gearbox cover, the upper end of the auxiliary gear lever is provided with a main arm shaft sleeve through a locating pin, and the main arm shaft sleeve is fixedly connected with a main arm of which one end is provided with a spring seat B; the front part of a secondary gear lever seat of the gearbox cover is provided with a secondary arm seat, a secondary arm shaft is arranged in the secondary arm seat, and a shaft sleeve and a spring seat A are arranged on the secondary arm; the connecting plate and the extension spring are sleeved on the spring seat A and the spring seat B, and a locking structure for a locking column on the main arm and the auxiliary arm to enter the locking nest is formed by the linkage of the connecting sleeve and the connecting rod on the gear lever, the connecting plate, the spring seat A, the spring seat B and the extension spring; the included angle between the axis of the gear lever and the bottom plane of the gear box cover is 30-50 degrees.

Description

Low-speed gear anti-disengagement gear lock for four-wheel drive agricultural vehicle

Technical Field

The utility model relates to a technical improvement of a gearbox of a four-wheel drive agricultural vehicle, in particular to a low-gear anti-disengagement lock of the four-wheel drive agricultural vehicle.

Background

Currently, a gear transmission is mostly adopted by a walking tractor and a four-wheel agricultural vehicle in China, and the most frequently occurring fault of the transmission is gear disengagement. In the running or agricultural production operation process, parts such as gears, gear shafts, bearings and shifting forks in a gearbox are often worn due to frequent gear shifting, or all gear meshing surfaces and bearings are worn early due to serious overload operation, road surface jolting, abrupt deceleration and the like of a vehicle, so that axial movement is generated, axial thrust is formed on meshing teeth, and when the axial thrust is greater than the locking force of a gear spring, a gear shift rod suddenly jumps to a neutral gear from a form gear, so that gear release failure is caused. The frequent occurrence of the phenomenon affects the normal running and production operation efficiency, and even the vehicle rollover accident can occur when the vehicle is in full load and goes up a slope if the gear is removed, thereby threatening the personal safety. In order to solve the problem of gear disengagement of agricultural vehicles and hand tractors, people purposefully carry out technical improvement or maintenance, and effective measures are adopted to reduce and eliminate additional axial force generated during the work of gears, so that the vehicle performance is improved, and the problem of gear disengagement is solved.

Disclosure of Invention

The utility model aims to provide a low-speed gear anti-disengagement lock for a four-wheel drive agricultural vehicle, which is simple in structure, convenient to apply, good in anti-disengagement effect, safe and reliable.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: a low-speed gear anti-drop gear lock of a four-wheel drive agricultural vehicle comprises a gearbox cover, a gear lever, an auxiliary arm, a main arm, a connecting plate and a spring, wherein the auxiliary gear lever is arranged in an auxiliary gear lever seat on the gearbox cover, the upper end of the auxiliary gear lever is provided with a main arm shaft sleeve through a locating pin, and one end of the main arm shaft sleeve is fixedly connected with a main arm with a spring seat B; the front part of the auxiliary gear lever seat of the gearbox cover is provided with an auxiliary arm seat, an auxiliary arm shaft is arranged in the auxiliary arm seat, and the upper end of the auxiliary arm shaft is provided with an auxiliary arm of which one end is provided with a shaft sleeve and one end is provided with a spring seat A; a connecting plate and an extension spring are sleeved on a spring seat B on a main arm of a spring seat A on the auxiliary arm, and a locking structure of a locking column on the auxiliary arm entering a locking nest on the main arm is formed by the linkage of a connecting sleeve, a connecting rod, the connecting plate, the spring seat A, the spring seat B and the extension spring on the gear lever; the included angle between the axis of the gear lever and the bottom plane of the gear box cover is 30-50 degrees.

The connecting plates are respectively provided with a long hole at the positions corresponding to the spring seat A and the spring seat B.

The auxiliary arm is provided with a convex lock column at one side corresponding to the main arm, and a concave lock nest is arranged at one side corresponding to the auxiliary arm.

When the gear shifting device is required to be shifted from a high gear to a low gear during operation, the gear shifting lever handle is pulled backwards, the connecting sleeve fixed on the gear shifting lever is pulled to move backwards, the auxiliary gear shifting sleeve enables the lock cylinder to enter the lock socket under the action of the spring along with the displacement of the main arm and the auxiliary arm through the connecting rod pulling connecting plate and other mechanisms, the main arm and the auxiliary arm are locked, the auxiliary gear shifting lever fixedly connected with the main arm is locked, and gear shifting caused by the axial direction of the shifting fork is prevented. The utility model has simple structure, reasonable design and good anti-disengagement effect.

Drawings

Fig. 1 is a schematic diagram of the front view structure of the present utility model.

Fig. 2 is an enlarged schematic view of a portion of fig. 1.

Fig. 3 is a schematic top view of the present utility model.

Fig. 4 is a schematic diagram of the unlocking state of the anti-disengagement lock of the utility model.

Fig. 5 is a schematic view of the lock cylinder of the present utility model in a locked state with the lock cylinder top in the main arm lock socket.

In the figure: 1. a gearbox cover; 2. an auxiliary arm seat; 3. a shaft sleeve; 4. a secondary arm shaft; 5. a tension spring; 6. a secondary shift lever; 7. a positioning pin; 8. a main arm shaft sleeve; 9. a connecting rod; 10. a shift lever; 11. connecting sleeves; 12. a handle; 13. a secondary arm; 14. a main arm; 15. a connecting plate; 16. a secondary gear lever seat; 17. a spring seat A; 18. a spring seat B; 19. a long hole B; 20. locking a column; 21. locking the nest; 22. long hole a.

Detailed Description

The utility model provides a four-wheel drive agricultural vehicle low-speed keeps off anti-disengaging gear lock, includes gearbox cover 1, selector lever 10, auxiliary arm 13, master arm 14, connecting plate 15, extension spring 5 are constituteed, installs auxiliary selector lever 6 in the auxiliary selector lever seat 16 on gearbox cover 1, and master arm axle sleeve 8 is installed through locating pin 7 to the upper end of auxiliary selector lever, and a master arm 14 that one end was equipped with spring holder B18 is fixed firmly on the master arm axle sleeve; the front part of a secondary gear lever seat 16 of the gearbox cover 1 is provided with a secondary arm seat 2, a secondary arm shaft 4 is arranged in the secondary arm seat, and the upper end of the secondary arm shaft is provided with a secondary arm 13 with one end provided with a shaft sleeve 3 and one end provided with a spring seat A17; the connecting plate 15 and the extension spring 5 are sleeved on the spring seat A17 on the auxiliary arm 13 and the spring seat B18 on the main arm 14, and the main arm 14 and the auxiliary arm 13 are caused to rotate and displace through the linkage of the connecting sleeve 11 and the connecting rod 9 on the gear lever 10, the connecting plate, the spring seat A, the spring seat B and the extension spring, so that the lock column 20 enters a locking structure of the lock socket 21; the angle between the axis of the gear lever 10 and the bottom plane of the gear box cover 1 is 30-50 degrees. The connecting plate 15 is provided with a

long hole

22, 19 at each of its positions corresponding to the spring seat a and the spring seat B. The side of the auxiliary arm corresponding to the main arm is provided with a convex lock column 20, and the side of the main arm corresponding to the auxiliary arm is provided with a concave lock nest 21. When the gear shifting lever is required to be shifted from a high gear to a low gear during operation, the gear shifting lever handle is pulled outwards, the connecting sleeve 11 on the gear shifting lever is pulled to move outwards, the connecting sleeve pulls the connecting plate 15 through the connecting rod 9, the connecting plate pulls the main arm 14 to rotate clockwise by taking the axis of the auxiliary gear shifting lever as the center of a circle, meanwhile, the auxiliary gear shifting lever rotates along with the main arm shaft sleeve due to the fact that the locating pin fixes the main arm shaft sleeve at the upper end of the auxiliary gear shifting lever, the sliding gear is shifted to the low gear position through the shifting fork and the like, meanwhile, the position and the angle of the lock nest 21 on the main arm are changed along with the movement of the main arm, the lock cylinder 20 slides downwards, enters the lock nest under the action of the spring when the lock cylinder slides to the lock nest, the main arm and the auxiliary gear shifting lever fixedly connected with the main arm are braked to rotate, and the axial movement of the shifting fork and the sliding gear is prevented, and the purpose of no gear shifting is achieved.

Claims

1. The utility model provides a four-wheel drive agricultural vehicle low gear anticreep keeps off lock, includes gearbox lid, selector lever, auxiliary arm, master arm, connecting plate, spring, installs vice selector lever characterized by in the vice selector lever seat on the gearbox lid: the upper end of the auxiliary gear lever is provided with a main arm shaft sleeve through a locating pin, and a main arm with a spring seat B at one end is fixedly connected to the main arm shaft sleeve; the front part of the auxiliary gear lever seat of the gearbox cover is provided with an auxiliary arm seat, an auxiliary arm shaft is arranged in the auxiliary arm seat, and the upper end of the auxiliary arm shaft is provided with an auxiliary arm of which one end is provided with a shaft sleeve and one end is provided with a spring seat A; a connecting plate and an extension spring are sleeved on a spring seat A on the auxiliary arm and a spring seat B on the main arm, and a locking structure that a locking column on the auxiliary arm enters a locking nest on the main arm is formed by the linkage of a connecting sleeve, a connecting rod, the connecting plate, the spring seat A, the spring seat B and the extension spring on the gear lever; the included angle between the axis of the gear lever and the bottom plane of the gear box cover is 30-50 degrees.

2. The low gear anti-disengagement lock for a four-wheel drive agricultural vehicle according to claim 1, wherein: the auxiliary arm is provided with a convex lock column at one side corresponding to the main arm, and a concave lock nest is arranged at one side corresponding to the auxiliary arm.