Speed reducer with differential lock

Abstract

The utility model discloses a speed reducer with a differential lock, and relates to the technical field of speed reducers. Comprising a speed reducer body and a structure with a differential lock, the structure with the differential lock is arranged in the speed reducer body and comprises an electromagnetic valve, a support, a shifting fork pin, a shifting fork sleeve and a main sliding sleeve, the outer wall of the electromagnetic valve is installed on the speed reducer body, the outer wall of the shifting fork pin is fixedly embedded in the speed reducer body, and the shifting fork pin is rotationally sleeved with the inner wall of the support; the shifting fork pin is rotationally sleeved with the inner wall of the shifting fork sleeve, and the outer wall of the main sliding sleeve is rotationally embedded in the shifting fork sleeve. Through the support, the shifting fork pin, the shifting fork sleeve and the main sliding sleeve, rectangular teeth on the left end face of the sliding sleeve can be controlled to be meshed with rectangular teeth on the right end face of the differential shell through parts, so that the differential shell and a half shaft which is in transmission connection with the interior of the sliding sleeve through a spline cannot rotate relatively in the rotating direction around the axis of the half shaft, and locking of the differential lock is completed. And the vehicle wheels cannot slip.

Description

Technical Field

[0001] The utility model relates to the technical field of speed reducers, in particular to a speed reducer with a differential lock. Background Art

[0002] At present, the reducer is an important mechanical transmission device, which is widely used in various mechanical equipment to reduce the rotation speed, increase the output torque and reduce the inertia of the load.

[0003] The reducers currently used in vehicles only have the functions of reducing speed and increasing torque. When encountering slippery roadsides, muddy roads, sandy roads, etc., it is easy to cause slipping. The wheels on one side of the vehicle lose grip and spin, that is, slipping, while the other side cannot output torque, and the entire vehicle cannot move. The differential lock mechanism on the market is complex and expensive, making it difficult to popularize in large quantities. Utility Model Content

[0004] The utility model provides a speed reducer with a differential lock. Through a bracket, a fork pin, a fork sleeve and a main sliding sleeve, the components can be used to control the engagement of rectangular teeth on the left end surface of the sliding sleeve with rectangular teeth on the right end surface of the differential housing, so that the differential housing and a half shaft connected to the sliding sleeve through a spline transmission cannot rotate relative to each other in the direction of rotation around the axis of the half shaft, that is, the differential lock is locked, so that the vehicle wheels cannot slip.

[0005] To achieve the above purpose, the utility model is implemented through the following technical solutions: a reducer with a differential lock, comprising:

[0006] Reducer body;

[0007] With differential lock structure, installed in the reducer body;

[0008] The differential lock structure includes a solenoid valve, a bracket, a fork pin, a fork sleeve and a main sleeve. The outer wall of the solenoid valve is mounted on the reducer body, the outer wall of the fork pin is fixedly embedded in the reducer body, the inner wall of the bracket is rotatably sleeved on the fork pin, the inner wall of the fork sleeve is rotatably sleeved on the fork pin, and the outer wall of the main sleeve is rotatably embedded in the fork sleeve.

[0009] As the reducer with a differential lock of the utility model, the inner wall of the reducer body is provided with a secondary sliding sleeve, and the main sliding sleeve and the secondary sliding sleeve are matched with each other on the side close to each other.

[0010] As a speed reducer with a differential lock of the utility model, a U-shaped spring is wound between the bracket, the fork pin and the fork sleeve.

[0011] As the reducer with differential lock of the utility model, the output end of the solenoid valve abuts against the bracket.

[0012] As the reducer with a differential lock of the utility model, the reducer body is composed of two half shells.

[0013] The utility model provides a speed reducer with a differential lock, which has the following beneficial effects:

[0014] (1) The reducer with differential lock can use the bracket, fork pin, fork sleeve and main sleeve to control the rectangular teeth on the left end face of the sleeve to engage with the rectangular teeth on the right end face of the differential housing, so that the differential housing and the half-shaft connected to the sleeve through spline transmission cannot rotate relative to each other in the direction of rotation around the axis of the half-shaft, that is, the differential lock is locked, so that the vehicle wheels cannot slip. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is the front view of the utility model;

[0016] Figure 2 It is a cross-sectional view of the utility model;

[0017] Figure 3 It is an exploded view of the utility model;

[0018] Figure 4 It is an enlarged schematic diagram of the utility model A.

[0019] In the figure: 1 reducer body; 2, solenoid valve; 3, bracket; 4, fork pin; 5, fork sleeve; 6, main sleeve; 7, auxiliary sleeve; 8, U-shaped spring. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the practical embodiment to clearly and completely describe the technical solution in the practical embodiment. Obviously, the described embodiment is only a part of the embodiment of the practical embodiment, not all of the embodiments. Based on the embodiment in the practical embodiment, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this practical embodiment.

[0021] See also Figure 1-4 The utility model provides a technical solution: a reducer with a differential lock, comprising:

[0022] Reducer body 1;

[0023] With differential lock structure, arranged in the reducer body 1;

[0024] The differential lock structure includes a solenoid valve 2, a bracket 3, a fork pin 4, a fork sleeve 5 and a main sleeve 6. The outer wall of the solenoid valve 2 is mounted on the reducer body 1, the outer wall of the fork pin 4 is fixedly embedded in the reducer body 1, the inner wall of the bracket 3 is rotatably sleeved on the fork pin 4, the inner wall of the fork sleeve 5 is rotatably sleeved on the fork pin 4, and the outer wall of the main sleeve 6 is rotatably embedded in the fork sleeve 5.

[0025] In this implementation scheme: through the solenoid valve 2, the solenoid valve 2 receives the vehicle differential lock control signal and the power is turned on, so that the valve core slidingly fitted inside the solenoid valve 2 slides out from the inside of the solenoid valve 2, and the valve core head of the solenoid valve 2 eliminates the gap with the right arm of the bracket 3, and the surface contact pushes the right arm of the bracket 3, so that the bracket 3 rotates clockwise around its own axial hole, and at the same time compresses the U-shaped spring fixedly connected to the bracket 3 through the support foot in the clockwise direction, that is, the fork foot with a rotational direction clearance on the shift fork sleeve that slides in the sleeve ring groove swings to the left, so that the gap between the fork foot on the shift fork sleeve and the left measuring surface of the ring groove of the main sleeve 6 gradually decreases.

[0026] Specifically, the inner wall of the reducer body 1 is provided with a secondary sliding sleeve 7 , and the main sliding sleeve 6 and the secondary sliding sleeve 7 are matched with each other at the sides close to each other.

[0027] In this embodiment: the main sleeve 6 is slidably fitted on the half-shaft through the internal spline clearance. When the fork foot on the shift fork sleeve contacts the left side surface of the annular groove of the main sleeve 6, the main sleeve 6 is pushed to slide leftward on the half-shaft, so that the rectangular teeth on the left end surface of the main sleeve 6 engage with the rectangular teeth of the auxiliary sleeve 7 fitted on the half-shaft through the clearance hole, so that the auxiliary sleeve 7 and the half-shaft cannot rotate relative to each other around the axis centerline of the half-shaft, that is, the differential lock is locked and the vehicle cannot slip.

[0028] Specifically, a U-shaped spring 8 is wound between the bracket 3 , the fork pin 4 and the fork sleeve 5 .

[0029] In this embodiment: the elastic force generated by the compression of the U-shaped spring pushes the fork arm of the fork sleeve through the surface contact of the belly section of the U-shaped spring, so that the fork sleeve rotates clockwise around its own axial center hole.

[0030] Specifically, the output end of the solenoid valve 2 abuts against the bracket 3 .

[0031] In this embodiment, the rotation of the bracket 3 is controlled by controlling the output end of the solenoid valve 2 to abut against the bracket 3 .

[0032] Specifically, the reducer body 1 is composed of two half shells.

[0033] In this embodiment, the reducer body 1 is formed by the reducer body 1 being composed of two half shells which are fixed together by a plurality of bolts.

[0034] When in use, the solenoid valve 2 receives the vehicle differential lock control signal and the power is turned on, so that the valve core slidingly fitted inside the solenoid valve 2 slides out from the inside of the solenoid valve 2. After the gap between the valve core head of the solenoid valve 2 and the right arm of the bracket 3 is eliminated, the surface contacts and pushes the right arm of the bracket 3, so that the bracket 3 rotates clockwise around its own axial hole, and at the same time, the U-shaped spring fixedly connected to the bracket 3 by the support foot is compressed in the clockwise direction. The elastic force generated by the compression of the U-shaped spring pushes the fork arm of the fork sleeve through the surface contact of the belly section of the U-shaped spring, so that the fork sleeve rotates clockwise around its own axial hole. That is, the fork foot in the sleeve ring groove with the rotation direction clearance slidingly fits swings to the left, so that the clearance between the fork foot on the fork sleeve and the left measuring surface of the ring groove of the main sleeve 6 gradually decreases, and the main sleeve 6 is slidingly fit on the half-shaft through the internal spline clearance. When the fork foot on the shift fork sleeve contacts the left measuring surface of the ring groove of the main sleeve 6, it pushes the main sleeve 6 to slide to the left on the half-shaft, so that the rectangular teeth on the left end face of the main sleeve 6 engage with the rectangular teeth of the auxiliary sleeve 7 on the half-shaft through the clearance hole, so that the auxiliary sleeve 7 and the half-shaft cannot rotate relative to each other around the axis centerline of the half-shaft, that is, the differential lock is locked and the vehicle cannot slip.

[0035] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A speed reducer with a differential lock, characterized in that: include: Reducer body (1); A differential lock structure is provided in the reducer body (1); The differential lock structure comprises a solenoid valve (2), a bracket (3), a fork pin (4), a fork sleeve (5) and a main sleeve (6); the outer wall of the solenoid valve (2) is mounted on the reducer body (1); the outer wall of the fork pin (4) is fixedly embedded in the reducer body (1); the inner wall of the bracket (3) is rotatably sleeved on the fork pin (4); the inner wall of the fork sleeve (5) is rotatably sleeved on the fork pin (4); and the outer wall of the main sleeve (6) is rotatably embedded in the fork sleeve (5).

2. The speed reducer with differential lock according to claim 1, characterized in that: The inner wall of the reducer body (1) is provided with a secondary sliding sleeve (7), and the main sliding sleeve (6) and the secondary sliding sleeve (7) are matched with each other at the sides close to each other.

3. The speed reducer with differential lock according to claim 2, characterized in that: A U-shaped spring (8) is wound between the bracket (3), the fork pull pin (4) and the fork pull sleeve (5).

4. The speed reducer with differential lock according to claim 3, characterized in that: The output end of the solenoid valve (2) abuts against the bracket (3).

5. The speed reducer with differential lock according to claim 4, characterized in that: The reducer body (1) consists of two half shells.

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