Differential lock device of automobile drive axle

Abstract

The utility model belongs to the technical field of automobile manufacturing, and particularly relates to a differential lock device of an automobile drive axle, which comprises a differential shell, and a first flange plate is arranged at the insertion end of the differential shell; the sliding joint sleeve can be arranged on the half shaft in a sliding and sleeving mode and is detachably connected with the half shaft, and a second flange plate is arranged at the inserting end of the sliding joint sleeve; the guide structure comprises a guide rod and an elastic piece, the guide rod is connected with the first flange plate and the second flange plate, the elastic piece is arranged on the guide rod in a sleeving mode, the insertion end of the differential mechanism shell is coaxially connected with the insertion end of the sliding joint sleeve through the guide structure, and when the half shaft is disassembled or assembled, the sliding joint sleeve can move and rotate in the axial direction of the sliding joint sleeve. Therefore, the insertion end of the sliding joint sleeve is separated from or engaged with the insertion end of the differential shell. According to the utility model, the half shaft can be randomly inserted into the differential mechanism again, so that the dismounting reliability of the half shaft is ensured, and the situation that the half shaft cannot be mounted back due to misoperation is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile manufacturing, in particular to a differential lock device of an automobile drive axle. Background Art

[0002] During daily use, trucks need to have their wheel ends maintained at regular intervals. Before maintenance, the drive axle half shaft needs to be pulled out of the axle housing. For drive axles with differential locks, the differential lock must be locked before pulling out the half shaft, so that the sliding coupling sleeve engages with the differential housing. In this way, when the half shaft is pulled out, if the differential lock is locked, the sliding coupling sleeve is fixed on the differential housing, and when the half shaft is reinserted, it can be ensured that the half shaft can be directly inserted into the spline of the half shaft gear in the differential. Otherwise, the sliding coupling sleeve will fall off and shift its position, so that when the half shaft is reinserted, the half shaft spline and the spline of the sliding coupling sleeve cannot match, and the half shaft cannot be inserted into the spline of the half shaft gear in the differential.

[0003] Therefore, when maintaining or repairing the wheel end of the axle, if it is necessary to pull out the half-axle, the differential lock must be locked first. However, it is inevitable that this lock will be forgotten during actual use, thereby reducing maintenance efficiency. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the purpose of the utility model is to provide a differential lock device for an automobile drive axle, which is used to solve the technical problem in the prior art that the automobile half-axles are difficult to disassemble and assemble due to the lack of differential lock.

[0005] In order to achieve the above-mentioned purpose and other related purposes, the technical solution of the utility model is as follows:

[0006] A differential lock device for a vehicle drive axle, comprising:

[0007] A differential housing, wherein a first flange is provided at a plug-in end of the differential housing;

[0008] A sliding engagement sleeve is provided on the half shaft and is detachably connected to the half shaft, and a second flange is provided at the plug-in end of the sliding engagement sleeve;

[0009] A guide structure, comprising a guide rod and an elastic member, wherein the guide rod is respectively connected to the first flange and the second flange, and the elastic member is sleeved on the guide rod;

[0010] The plug-in end of the differential case is coaxially connected with the plug-in end of the sliding coupling sleeve through the guide structure. When the half-shaft is removed or installed, the sliding coupling sleeve can move and rotate along its own axial direction to separate or engage the plug-in end of the sliding coupling sleeve with the plug-in end of the differential case.

[0011] Optionally, at least three guide rods are provided and arranged along the circumference of the sliding engagement sleeve.

[0012] Optionally, a limiting portion is provided on the guide rod, the first end of the elastic member abuts against the first flange, and the second end of the elastic member abuts against the limiting portion of the guide rod.

[0013] Optionally, the first flange is sleeved on the plug-in end of the differential housing, and the first flange is in a circular ring shape.

[0014] Optionally, a through guide hole is opened on the end surface of the first flange, and the first end of the guide rod is slidably inserted into the guide hole, and the guide hole corresponds to the guide rod one by one.

[0015] Optionally, an end surface of the plug-in end of the differential housing extends out of the end surface of the first flange toward the second flange.

[0016] Optionally, the second flange is sleeved on the plug-in end of the sliding engagement sleeve, and the second flange is in a circular ring shape.

[0017] Optionally, a circle of limiting grooves is provided on a side of the second flange facing the first flange, and the second end of the guide rod abuts against the limiting grooves.

[0018] Optionally, an end surface of the plug-in end of the sliding engagement sleeve extends out of the end surface of the second flange toward the first flange.

[0019] Optionally, a shift fork is further included, which is clamped on the sliding engagement sleeve and is close to a side of the second flange away from the first flange, so as to maintain the axial position of the sliding engagement sleeve.

[0020] As described above, the differential lock device of the automobile drive axle of the utility model has the following beneficial effects:

[0021] Through the cooperation of the first flange, the second flange and the guide structure, when the half-shaft is pulled out, even if the plug-in end of the sliding coupling sleeve is not meshed with the end face teeth of the plug-in end of the differential case, the sliding coupling sleeve can be maintained coaxial with the differential case by the guide rod, and the axial position of the sliding coupling sleeve is maintained by the elastic member and the shift fork on the guide rod, so that the half-shaft can be reinserted into the differential at will; the reliability of the disassembly and assembly of the half-shaft is ensured, thereby avoiding the situation where the half-shaft cannot be reinstalled due to misoperation, and improving the maintenance efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the assembly of the differential lock device of the automobile drive axle according to an embodiment of the utility model (with the half-axle pulled out);

[0023] Figure 2 It is a schematic diagram of the assembly of the differential housing and the sliding sleeve of the embodiment of the utility model;

[0024] Figure 3 It is a schematic diagram of the assembly of the differential housing and the first flange of an embodiment of the utility model;

[0025] Figure 4 It is a schematic diagram of the assembly of the sliding joint sleeve and the second flange according to an embodiment of the utility model;

[0026] Figure 5 It is a schematic diagram of the assembly of the sliding joint sleeve, the second flange and the guide structure according to an embodiment of the utility model.

[0027] Description of Reference Numerals

[0028] 1-differential housing; 11-first spline gear;

[0029] 2-sliding engagement sleeve; 21-second splicing tooth;

[0030] 3-first flange; 31-guide hole;

[0031] 4-second flange; 41-limiting groove;

[0032] 5-guide structure; 51-guide rod; 511-limiting part; 52-elastic member;

[0033] 6-shift fork; 7-axle shaft. DETAILED DESCRIPTION

[0034] The following is a specific embodiment of the present invention. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments. The details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0035] It should be noted that the diagrams provided in the present embodiment are only used to illustrate the basic concept of the present invention in a schematic manner, so the diagrams only show the components related to the present invention rather than being drawn according to the number, shape and size of the components in actual implementation. The form, quantity and proportion of each component in actual implementation can be changed at will, and the layout of the components may also be more complicated. It should be noted that the structure, proportion, size, etc. shown in the drawings attached to this specification are only used to match the content disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions that the present invention can be implemented, so they have no technical substantive significance. Any modification of the structure, change in the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effect and purpose that the present invention can produce. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for the convenience of description and are not used to limit the scope of the implementation of the present utility model. Changes or adjustments to their relative relationships should be regarded as the scope of the implementation of the present utility model without substantially changing the technical content.

[0036] In order to describe the present invention in detail, the differential lock device of the automobile drive axle of the present invention is specifically described below:

[0037] Please combine Figure 1 and Figure 2 As shown, the utility model provides a differential lock device for a vehicle drive axle, comprising: a differential housing 1, a sliding engagement sleeve 2 and a guide structure 5, wherein the plug-in end of the differential housing 1 is provided with a first flange 3; the sliding engagement sleeve 2 is used to be slidably sleeved on the half shaft 7 and detachably connected to the half shaft 7, and the plug-in end of the sliding engagement sleeve 2 is provided with a second flange 4; the guide structure 5 comprises a guide rod 51 and an elastic member 52, the guide rod 51 is respectively connected to the first flange 3 and the second flange 4, and the elastic member 52 is sleeved on the guide rod 51; the plug-in end of the differential housing 1 and the plug-in end of the sliding engagement sleeve 2 are coaxially connected through the guide structure 5, and when the half shaft 7 is removed or installed, the sliding engagement sleeve 2 can move and rotate along its own axial direction, so that the plug-in end of the sliding engagement sleeve 2 is separated or engaged with the plug-in end of the differential housing 1.

[0038] Specifically, the plug-in end of the differential case 1 is provided with a first plug-in tooth 11, and the plug-in end of the sliding engagement sleeve 2 is provided with a second plug-in tooth 21, and the first plug-in tooth 11 and the second plug-in tooth 21 can be plugged and meshed with each other; the half shaft 7 is connected to the sliding engagement sleeve 2, and is connected to the differential case 1 through the sliding engagement sleeve 2, and the end of the half shaft 7 is provided with a circle of half shaft 7 teeth, and the inner wall of the sliding engagement sleeve 2 is provided with a circle of sleeve teeth, and the sleeve teeth and the half shaft 7 teeth are meshed and connected with each other, so that the sliding engagement sleeve 2 can be slidably connected with the half shaft 7. By providing the first flange 3, the second flange 4 and the guide structure 5 connecting the first flange 3 and the second flange 4, the sliding engagement sleeve 2 can be moved and rotated in the axial direction, and the movement and rotation function of the sliding engagement sleeve 2 in its own axial direction makes it very simple to disassemble or install the half shaft 7. This design not only improves the maintenance efficiency, but also reduces the labor intensity of the operator. By relying on the guiding effect of the guide rod 51, the sliding coupling sleeve 2 is always kept coaxial with the differential housing 1. When the half-shaft 7 is pulled out, even if the end face teeth of the plug-in end of the sliding coupling sleeve 2 and the plug-in end of the differential housing 1 are not engaged, the position of the sliding coupling sleeve 2 will not be offset. In addition, the elastic member 52 (for example, a spring) can reset the guide rod 51 when the half-shaft 7 is pulled out to maintain the axial position of the sliding coupling sleeve 2. In this way, when the half-shaft 7 is inserted back into the differential, it can be smoothly connected to the sliding coupling sleeve 2 and connected to the differential housing 1 through the sliding coupling sleeve 2, thereby ensuring the reliability of the disassembly and assembly of the half-shaft 7, thereby avoiding the situation where the half-shaft 7 cannot be reinstalled due to misoperation.

[0039] In some embodiments, see Figure 2 , at least three guide rods 51 are provided and arranged along the circumference of the sliding engagement sleeve 2. Specifically, by arranging at least three guide rods 51 along the circumference of the sliding engagement sleeve 2, the stability of the sliding engagement sleeve 2 during movement and rotation can be ensured. This design effectively prevents the sliding engagement sleeve 2 from being offset or twisted when subjected to force, thereby ensuring that the sliding engagement sleeve 2 and the differential housing 1 are always coaxially connected. The circumferential arrangement of multiple guide rods 51 enables the sliding engagement sleeve 2 to evenly distribute the force to each guide rod 51 when subjected to force; the design of multiple guide rods 51 ensures that the sliding engagement sleeve 2 can move and rotate smoothly along its own axial direction, thereby improving reliability.

[0040] In the above implementation, see Figure 2, a limiting portion 511 is provided on the guide rod 51, a first end of the elastic member 52 abuts against the first flange 3, and a second end of the elastic member 52 abuts against the limiting portion 511 of the guide rod 51. Specifically, the limiting portion 511 facilitates the installation of the elastic member 52 and can prevent the elastic member 52 from being overly compressed or stretched. When the plug-in end of the sliding engagement sleeve 2 is connected to the plug-in end of the differential case 1, the guide rod 51 moves toward the direction close to the differential case 1, and when the plug-in end of the sliding engagement sleeve 2 is separated from the plug-in end of the differential case 1, the elastic member 52 is reset so that the guide rod 51 moves and resets in the direction away from the differential case 1.

[0041] In some embodiments, see Figure 3 , the first flange 3 is sleeved on the plug-in end of the differential housing 1, and the first flange 3 is in a circular ring shape. Specifically, the circular ring design makes the first flange 3 more stable in structure, and can withstand greater forces without being easily deformed or damaged. This structural strength ensures the stability and reliability of the differential lock device under complex road conditions or high-load operation. The circular ring design allows the first flange 3 to be smoothly sleeved on the plug-in end of the differential housing 1, achieving fast and accurate installation. At the same time, when disassembly is required, the first flange 3 can also be easily removed from the differential housing 1, which improves the convenience of repair and maintenance.

[0042] Continue reading Figure 3 It should be noted that a through guide hole 31 is provided on the end surface of the first flange 3, and the first end of the guide rod 51 is slidably inserted into the guide hole 31, and the guide hole 31 corresponds to the guide rod 51 one by one. Specifically, the number of the guide holes 31 is the same as the number of the guide rods 51, and each guide rod 51 corresponds to a guide hole 31. The guide hole 31 and the guide rod 51 are interference-fitted to ensure that the guide rod 51 can slide in the guide hole 31. The first end of the guide rod 51 is slidably inserted into the guide hole 31, ensuring that the sliding engagement sleeve 2 can move in the axial direction, thereby achieving the guidance and positioning of the sliding engagement sleeve 2.

[0043] It can be understood that the end face of the plug-in end of the differential case 1 extends out of the end face of the first flange 3 toward the second flange 4. The end face of the plug-in end of the differential case 1 extends out of the first flange 3, which ensures that the plug-in end of the differential case 1 can be smoothly plugged with the plug-in end of the sliding engagement sleeve 2 without being interfered by the first flange 3, thereby enhancing the stability of the connection.

[0044] See also Figure 4In the above embodiment, the second flange 4 is sleeved on the plug-in end of the sliding coupling sleeve 2, and the second flange 4 is in a circular ring shape. Specifically, the circular ring design makes the second flange 4 more stable in structure, and can withstand greater forces without being easily deformed or damaged. This structural strength ensures the stability and reliability of the differential lock device under complex road conditions or high-load operation. The circular ring design allows the second flange 4 to be smoothly sleeved on the plug-in end of the sliding coupling sleeve 2, achieving fast and accurate installation. At the same time, when disassembly is required, the second flange 4 can also be easily removed from the sliding coupling sleeve 2, which improves the convenience of repair and maintenance.

[0045] See also Figure 4 and Figure 5 It should be noted that a circle of limiting grooves 41 are provided on the side of the second flange 4 facing the first flange 3, and the second end of the guide rod 51 abuts against the limiting groove 41. Specifically, a plurality of guide rods 51 can be accommodated in the guide groove, and the guide groove and the guide rod 51 are interference fit to ensure that the guide rod 51 can slide in the guide groove, and the second end of the guide rod 51 abuts against the limiting groove 41, ensuring that the sliding engagement sleeve 2 can rotate along the axial direction.

[0046] It can be understood that the end surface of the plug-in end of the sliding engagement sleeve 2 extends out of the end surface of the second flange 4 toward the first flange 3. The end surface of the plug-in end of the sliding engagement sleeve 2 extends out of the second flange 4, which ensures that the plug-in end of the sliding engagement sleeve 2 can be smoothly plugged with the plug-in end of the differential case 1 without being interfered by the second flange 4, thereby enhancing the stability of the connection.

[0047] In the above embodiment, the differential lock device of the automobile drive axle further includes a shift fork 6, which is clamped on the sliding engagement sleeve 2 and close to the side of the second flange 4 away from the first flange 3, and is used to maintain the axial position of the sliding engagement sleeve 2. Specifically, the shift fork 6 is clamped on the sliding engagement sleeve 2, which can effectively maintain the axial position of the sliding engagement sleeve 2, prevent it from being offset or moved during operation, and enhance the axial position stability of the sliding engagement sleeve 2. Through the cooperation of the shift fork 6 and the elastic member 52, the axial position of the sliding engagement sleeve 2 can be guaranteed, thereby ensuring the reliability of the disassembly and assembly of the half shaft 7.

[0048] In summary, the differential lock device of the automobile drive axle provided by the utility model, through the cooperation of the first flange 3, the second flange 4 and the guide structure 5, ensures that when the half-shaft 7 is pulled out, even if the plug-in end of the sliding engagement sleeve 2 is not meshed with the end face teeth of the plug-in end of the differential housing 1, the sliding engagement sleeve 2 can be maintained coaxial with the differential housing 1 by the guide rod 51, and the axial position of the sliding engagement sleeve 2 is maintained by the elastic member 52 and the shift fork 6 on the guide rod 51, so that the half-shaft 7 can be reinserted into the differential at will; the reliability of the disassembly and assembly of the half-shaft 7 is ensured, thereby avoiding the situation where the half-shaft 7 cannot be reinstalled due to misoperation, and improving the maintenance efficiency.

[0049] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A differential lock device for a vehicle drive axle, characterized in that: include: A differential housing, wherein a first flange is provided at a plug-in end of the differential housing; A sliding engagement sleeve is provided on the half shaft and is detachably connected to the half shaft, and a second flange is provided at the plug-in end of the sliding engagement sleeve; A guide structure, comprising a guide rod and an elastic member, wherein the guide rod is respectively connected to the first flange and the second flange, and the elastic member is sleeved on the guide rod; The plug-in end of the differential case is coaxially connected with the plug-in end of the sliding coupling sleeve through the guide structure. When the half-shaft is removed or installed, the sliding coupling sleeve can move and rotate along its own axial direction to separate or engage the plug-in end of the sliding coupling sleeve with the plug-in end of the differential case.

2. The differential lock device of the automobile drive axle according to claim 1, characterized in that: At least three guide rods are provided and arranged along the circumference of the sliding engagement sleeve.

3. The differential lock device of the automobile drive axle according to claim 1 or 2, characterized in that: A limiting portion is provided on the guide rod, the first end of the elastic member abuts against the first flange, and the second end of the elastic member abuts against the limiting portion of the guide rod.

4. The differential lock device of the automobile drive axle according to claim 1, characterized in that: The first flange is sleeved on the plug-in end of the differential housing, and the first flange is in a circular ring shape.

5. The differential lock device of the automobile drive axle according to claim 4, characterized in that: A through guide hole is formed on the end surface of the first flange, and the first end of the guide rod is slidably inserted into the guide hole, and the guide hole corresponds to the guide rod one by one.

6. The differential lock device of the automobile drive axle according to claim 4, characterized in that: The end surface of the plug-in end of the differential housing extends out of the end surface of the first flange toward the second flange.

7. The differential lock device of the automobile drive axle according to claim 1, characterized in that: The second flange is sleeved on the plug-in end of the sliding joint sleeve, and the second flange is in a circular ring shape.

8. The differential lock device of the automobile drive axle according to claim 7, characterized in that: A circle of limiting grooves is provided on a side of the second flange facing the first flange, and the second end of the guide rod abuts against the limiting grooves.

9. The differential lock device of the automobile drive axle according to claim 7, characterized in that: The end surface of the plug-in end of the sliding engagement sleeve extends out of the end surface of the second flange toward the first flange.

10. The differential lock device of the automobile drive axle according to claim 1, characterized in that: It also includes a shift fork, which is clamped on the sliding engagement sleeve and close to the side of the second flange away from the first flange, and is used to maintain the axial position of the sliding engagement sleeve.

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