Differential planet axle

Abstract

The utility model provides a planet wheel shaft of a differential mechanism, belongs to the technical field of differential mechanisms, and solves the problem that an existing planet wheel shaft can axially move and collide with a clamping ring to generate noise. The differential mechanism comprises a shaft rod movably penetrating through a differential mechanism shell, the two ends of the shaft rod are movably sleeved with shaft sleeves located on the inner side of the differential mechanism shell, and the inner walls of the shaft sleeves are provided with limiting mechanisms used for limiting rotation and axial movement of the shaft sleeves on the shaft rod; the annular wing plate is provided with an abutting rod movably penetrating through the annular wing plate in the length direction of the shaft rod, and the abutting rod is sleeved with a first spring abutting against the annular wing plate and the differential mechanism shell. The shaft sleeve is fixed to the shaft rod under the action of the limiting mechanism and used in cooperation with the abutting rod and the first spring, so that when the shaft rod axially displaces, the first spring can absorb the impact force of displacement of the shaft rod, the clamping ring is prevented from being impacted, noise is reduced, and the service life of the clamping ring is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of differentials, in particular to a differential planetary axle. Background Art

[0002] The differential enables the left and right (or front and rear) driving wheels of a car to rotate at different speeds, making it easier for the car to turn. The differential is mainly composed of left and right half-shaft gears, two planetary gears and a differential housing. The two planetary gears need to rotate on a planetary axle. The planetary axle transmits torque to the planetary gears to achieve torque distribution, so that the wheels can achieve differential operation.

[0003] The planetary axle is movable through the differential housing and fixed on the differential housing. The general fixing method is to use a pin. Since the axial force it can withstand is small, the pin fixation is replaced by a retaining ring at both ends in the prior art to prevent the planetary axle from moving out of the differential housing. However, the retaining ring limiting method will leave a certain assembly gap between the retaining ring and the differential housing. Therefore, the planetary axle will produce axial displacement during operation, thereby hitting the retaining ring to produce noise, and the retaining ring will be damaged prematurely due to the impact. Utility Model Content

[0004] In view of the above problems, the purpose of the utility model is to provide a differential planetary gear shaft, in which the shaft sleeve is fixed on the shaft rod under the action of a limiting mechanism, and cooperates with the use of abutment rod and a first spring so that when the shaft rod is axially displaced, the first spring can absorb the impact force of the shaft rod displacement, thereby avoiding the retaining ring from being hit, thereby reducing noise and ensuring the service life of the retaining ring.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A differential planetary gear shaft comprises a shaft rod movably passing through a differential housing, both ends of the shaft rod are movably sleeved with shaft sleeves located on the inner side of the differential housing, the inner wall of the shaft sleeve is provided with a limiting mechanism for limiting the rotation and axial movement of the shaft sleeve on the shaft rod, an annular wing plate is fixedly connected to one end of the shaft sleeve close to the differential housing, an abutment rod movably passing through the annular wing plate along the length direction of the shaft rod is provided on the annular wing plate, and a first spring is sleeved on the abutment rod for abutting against the annular wing plate and the differential housing.

[0007] Preferably, the limiting mechanism includes an accommodating cavity provided on the inner wall of the sleeve, a second spring is arranged in the accommodating cavity, a clamping block connected to the second spring is slidably provided in the accommodating cavity, and a limiting groove adapted to the clamping block is provided on the shaft rod.

[0008] Preferably, a through groove communicating with the accommodating cavity is formed on the end surface of the shaft sleeve away from the annular wing plate, and a shift rod connected with the clamping block is movably arranged in the through groove.

[0009] Preferably, the end of the block close to the shaft is arc-shaped.

[0010] Preferably, the abutment rod is provided with stoppers located on both sides of the annular wing plate.

[0011] Preferably, both ends of the shaft rod are provided with annular grooves, and a clamping ring is clamped in the annular groove.

[0012] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0013] The sleeve is fixed on the shaft rod under the action of the limiting mechanism, and cooperates with the use of the abutment rod and the first spring so that when the shaft rod is axially displaced, the first spring can absorb the impact force of the shaft rod displacement to avoid the clamping ring from being hit, thereby reducing noise and ensuring the service life of the clamping ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 A schematic diagram of the structure provided for an embodiment of the utility model;

[0016] Figure 2 for Figure 1 Enlarged structural diagram at A in the middle.

[0017] Description of the drawings: 1-differential housing; 2-shaft rod; 3-annular groove; 4-retaining ring; 5-retaining groove; 6-annular wing plate; 7-first spring; 8-abutment rod; 9-sleeve; 10-bearing; 11-planetary gear; 12-stopper; 13-retaining block; 14-second spring; 15-accommodating chamber; 16-through groove; 17-gear lever; 18-limiting groove. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] In the description of the present invention, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the application is usually placed when used. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0021] Combine the following Figure 1 and Figure 2 The utility model is described in detail.

[0022] Example

[0023] A differential planetary gear shaft comprises a shaft 2 that movably passes through a differential housing 1, shaft sleeves 9 located on the inner side of the differential housing 1 are movably sleeved at both ends of the shaft 2, and a limiting mechanism for limiting the rotation and axial movement of the shaft sleeve 9 on the shaft 2 is provided on the inner wall of the shaft sleeve 9, and an annular wing plate 6 is fixedly connected to one end of the shaft sleeve 9 close to the differential housing 1, and an abutment rod 8 that movably passes through the annular wing plate 6 along the length direction of the shaft 2 is provided on the annular wing plate 6, and a first spring 7 that abuts against the annular wing plate 6 and the differential housing 1 is sleeved on the abutment rod 8, and a bearing 10 is fixedly sleeved on the shaft sleeve 9, and a planetary gear 11 is sleeved on the bearing 10. When the planetary gear shaft moves axially, the first spring 7 at one end of the shaft 2 is compressed, thereby absorbing the impact force during the displacement process, thereby avoiding the occurrence of collision and reducing noise. The abutment rod 8 can slide relatively on the annular wing plate 6, and can play a guiding and supporting role for the first spring 7 to avoid the separation of the first spring 7.

[0024] The limiting mechanism includes an accommodating cavity 15 provided on the inner wall of the shaft sleeve 9, a second spring 14 is provided in the accommodating cavity 15, a clamping block 13 connected to the second spring 14 is slidably provided in the accommodating cavity 15, and a limiting groove 18 adapted to the clamping block 13 is provided on the shaft rod 2. During assembly, the shaft rod 2 extends into the shaft sleeve 9, and the limiting groove 18 is aligned with the clamping block 13. When the clamping block 13 is aligned with the limiting groove 18, the second spring 14 bounces the clamping block 13 into the limiting groove 18, thereby fixing the shaft sleeve 9 and the shaft rod 2.

[0025] In order to facilitate the later disassembly of the sleeve 9 for maintenance and replacement, a through groove 16 connected to the accommodating cavity 15 is opened on the end surface of the sleeve 9 away from the annular wing plate 6, and a shift rod 17 connected to the block 13 is movably arranged in the through groove 16. A tool can be used to reach into the through groove 16 to move the shift rod 17, so that the block 13 is disengaged from the limit groove 18, and then the shaft rod 2 is pulled out to complete the disassembly of the sleeve 9 and the shaft rod 2.

[0026] The end of the block 13 close to the shaft 2 is arc-shaped. The arc-shaped end facilitates the block 13 to be inserted into the limiting groove 18 more easily, making the assembly operation more convenient.

[0027] The abutment rod 8 is provided with stoppers 12 located on both sides of the annular wing plate 6. The distance between the two stoppers 12 is slightly greater than the thickness of the annular wing plate 6, so that the abutment rod 8 and the annular wing plate 6 can move relative to each other normally, but the abutment rod 8 is restricted from being separated from the annular wing plate 6.

[0028] An annular groove 3 is formed at both ends of the shaft 2, and a snap ring 4 is clamped in the annular groove 3. The two snap rings 4 can limit the shaft 2 from moving out of the differential housing 1, avoiding the need to machine corresponding sockets in the differential housing 1 when using a latch fixing structure, which is inconvenient.

[0029] The inner wall of the differential housing 1 is provided with a slot 5 that cooperates with the abutment rod 8 . After the abutment rod 8 is inserted into the slot 5 , the rotation of the shaft rod 2 can be restricted.

[0030] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A differential planetary gear shaft, comprising a shaft (2) movably penetrating a differential housing (1), characterized in that: The two ends of the shaft rod (2) are movably sleeved with shaft sleeves (9) located inside the differential housing (1); the inner wall of the shaft sleeve (9) is provided with a limiting mechanism for limiting the rotation and axial movement of the shaft sleeve (9) on the shaft rod (2); one end of the shaft sleeve (9) close to the differential housing (1) is fixedly connected with an annular wing plate (6); the annular wing plate (6) is provided with an abutment rod (8) that movably penetrates the annular wing plate (6) along the length direction of the shaft rod (2); and the abutment rod (8) is sleeved with a first spring (7) that abuts against the annular wing plate (6) and the differential housing (1).

2. A differential planetary gear shaft according to claim 1, characterized in that: The limiting mechanism comprises a receiving cavity (15) formed on the inner wall of the shaft sleeve (9), a second spring (14) being arranged in the receiving cavity (15), a clamping block (13) connected to the second spring (14) being slidably arranged in the receiving cavity (15), and a limiting groove (18) adapted to the clamping block (13) being formed on the shaft rod (2).

3. A differential planetary gear shaft according to claim 2, characterized in that: The end surface of the shaft sleeve (9) away from the annular wing plate (6) is provided with a through groove (16) communicating with the accommodating cavity (15), and a shift rod (17) connected to the clamping block (13) is movably arranged in the through groove (16).

4. A differential planetary gear shaft according to claim 2, characterized in that: The end of the clamping block (13) close to the shaft rod (2) is arc-shaped.

5. The differential planetary gear shaft according to claim 1, characterized in that: The abutment rod (8) is provided with stoppers (12) located on both sides of the annular wing plate (6).

6. The differential planetary gear shaft according to claim 1, characterized in that: Annular grooves (3) are formed at both ends of the shaft rod (2), and snap rings (4) are clamped in the annular grooves (3).

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