Differential mechanism with stable structure

Abstract

The utility model provides a differential mechanism with a stable structure, and belongs to the technical field of differential mechanisms. The problem that in the prior art, a differential mechanism is damaged due to insufficient abrasion resistance is solved. The differential mechanism comprises a differential mechanism gear, two differential mechanism shells and a planetary gear assembly, the two differential mechanism shells are fixed to the two sides of the differential mechanism gear respectively, the planetary gear assembly is installed in the differential mechanism gear, and the planetary gear assembly comprises a plurality of planetary gears, half axle gears and planetary gear universal joints. The planetary gear and the half axle gear are meshed with each other, the number of the planetary tooth cross shafts is two, connecting grooves are formed in the middles of the planetary tooth cross shafts, the two planetary tooth cross shafts are connected with each other through the connecting grooves, a containing groove is formed in the differential gear, and the ends of the planetary tooth cross shafts are installed in the containing groove. The two sides of the end of the planetary tooth cross shaft are of a plane structure, abrasion-resistant strips are formed on the plane structure, the number of the abrasion-resistant strips is two, the fixing strips are distributed in the axial direction of the planetary tooth cross shaft, and the planetary tooth cross shaft penetrates through the planetary gear. The utility model has the advantages of good wear-resistant property and long service life.

Description

Technical Field

[0001] This utility model belongs to the field of differential technology and relates to a differential with a stable structure. Background Technology

[0002] During driving, cars encounter various uneven road surfaces and impacts. The gears, half-shafts, and other components in a differential have a certain amount of clearance and elasticity, which can absorb and buffer the impact from the road surface to a certain extent, reducing the impact of these impacts on the vehicle's transmission system and body. However, after prolonged use, the differential shaft in the differential is prone to damage due to friction.

[0003] Chinese patent publication number CN210344209U discloses a pneumatically locking differential, including a housing and a base. A cavity is opened at one end of the housing, and the base is located at the port of the cavity. The transmission mechanism includes a coaxially arranged half-shaft gear one and half-shaft gear two, which are connected by a transmission gear. A shaft hole coaxial with half-shaft gear one and half-shaft gear two is also opened on the housing and the base. The outer diameter of the bushing part is smaller than the outer diameter of the housing. A pneumatic drive component is sleeved on the bushing part. One end of the push component cooperates with the pneumatic drive component, and the other end cooperates with the locking mechanism. The locking mechanism cooperates with half-shaft gear one or half-shaft gear two.

[0004] As can be seen from the specification and accompanying drawings of the patent, in the pneumatic locking differential provided by the patent, the planetary shaft is cylindrical and its surface does not have a wear-resistant structure. After prolonged use, the planetary shaft is prone to damage. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in the prior art by providing a differential with a stable structure.

[0006] The objective of this utility model can be achieved through the following technical solution: A differential with a stable structure includes a differential gear, a differential housing, and a planetary gear assembly. Two differential housings are provided, each fixed to one side of the differential gear. The planetary gear assembly is installed inside the differential gear. The planetary gear assembly includes several planetary gears, half-shaft gears, and planetary cross shafts. The planetary gears and half-shaft gears mesh with each other. Two planetary cross shafts are provided, each with a connecting groove in the middle. The two planetary cross shafts are connected to each other through the connecting groove. A placement groove is provided inside the differential gear. The ends of the planetary cross shafts are installed in the placement groove. The ends of the planetary cross shafts have planar structures on both sides, and wear-resistant strips are formed on the planar structures. Two wear-resistant strips are provided, and the fixing strips are distributed along the axial direction of the planetary cross shafts. The planetary cross shafts pass through the planetary gears.

[0007] In the aforementioned differential with a stable structure, the differential gear has several fixed grooves inside, the fixed grooves and placement grooves are distributed at intervals, and fastening bolts are inserted in the fixed grooves, the fastening bolts being connected to the differential housing.

[0008] In the aforementioned differential with a stable structure, an arc-shaped washer is provided at the outer end of the planetary gear, and the arc-shaped washer is sleeved on the planetary gear cross shaft.

[0009] In the aforementioned differential with a stable structure, a flat washer is fitted on the half-shaft gear, and the outer end of the half-shaft gear extends into the differential housing.

[0010] Compared with the prior art, the differential with a stable structure provided by this utility model has the following beneficial effects: by setting a planar structure at the end of the planetary gear cross shaft and setting two wear-resistant strips on the planar structure, the wear resistance of the contact parts between the planetary gear cross shaft and the mating parts is enhanced, excessive wear caused by long-term friction is prevented, and the normal working clearance and transmission accuracy of this utility model are maintained. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0012] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0013] Figure 3 This is a schematic diagram of the planetary gear cross shaft structure.

[0014] In the diagram: 1. Differential gear; 11. Placement slot; 12. Fixing slot; 2. Differential housing; 3. Planetary gear; 4. Half shaft gear; 5. Planetary gear cross shaft; 51. Connecting slot; 52. Planar structure; 53. Wear-resistant strip; 6. Fastening bolt; 7. Arc washer; 8. Flat washer. Detailed Implementation

[0015] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0016] like Figures 1 to 3As shown, this embodiment includes a differential gear 1, a differential housing 2, and a planetary gear 3 assembly. There are two differential housings 2 arranged symmetrically. The two differential housings 2 are respectively fixed to both sides of the differential gear 1. The differential gear 1 has an open internal structure, and the planetary gear 3 assembly is installed inside the differential gear 1. The planetary gear 3 assembly includes several planetary gears 3, half-shaft gears 4, and planetary gear cross shafts 5. There are four planetary gears 3 and two half-shaft gears 4. The four planetary gears 3 mesh with each other, and the half-shaft gears 4 are located on both sides of the four planetary gears 3, with each half-shaft gear 4 meshing with the four planetary gears 3.

[0017] like Figures 1 to 3 As shown, there are two planetary cross shafts 5, and each planetary cross shaft 5 has a connecting groove 51 in the middle. The two planetary cross shafts 5 are connected to each other through the connecting grooves 51. The differential gear 1 has four placement grooves 11 arranged in a circular array inside. The ends of the planetary cross shafts 5 are installed in the placement grooves 11. Each planetary cross shaft 5 passes through the planetary gear 3 and is connected to the two planetary gears 3. The ends of the planetary cross shafts 5 have two planar structures 52 on both sides, and wear-resistant strips 53 are formed on the planar structures 52. There are two wear-resistant strips 53, and the fixing strips are distributed along the axial direction of the planetary cross shafts 5.

[0018] Specifically, such as Figure 3 As shown, the wear-resistant strip 53 is a long triangular pyramidal structure, and two wear-resistant strips 53 are provided on the planar structures 52 on both sides of the planetary tooth cross shaft 5.

[0019] To elaborate further, such as Figures 1 to 2 As shown, the differential gear 1 has four fixing slots 12 inside. The fixing slots 12 are also arranged in a circular array and the fixing slots 12 and the placement slots 11 are distributed at intervals. The fastening bolts 6 pass through the fixing slots 12 and are connected to the differential housing 2. The fastening bolts 6 fix the differential housing 2 to the differential gear 1.

[0020] To elaborate further, such as Figures 1 to 2 As shown, an arc-shaped washer 7 is provided at the outer end of the planetary gear 3. The arc-shaped washer 7 is sleeved on the planetary gear cross shaft 5. A flat washer 8 is sleeved on the half-shaft gear 4. The outer end of the half-shaft gear 4 extends into the differential housing 2. The arc-shaped washer 7 and the flat washer 8 respectively play the role of adjusting the clearance and reducing friction for the planetary gear 3 and the half-shaft gear 4, further improving the wear resistance of this embodiment.

[0021] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0022] Although this document uses a variety of terms, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would contradict the spirit of this invention.

Claims

1. A differential with a stable structure, comprising a differential gear (1), a differential housing (2), and a planetary gear (3) assembly, wherein there are two differential housings (2) respectively fixed on both sides of the differential gear (1), and the planetary gear (3) assembly is installed inside the differential gear (1), characterized in that: The planetary gear (3) assembly includes several planetary gears (3), half-shaft gears (4), and planetary cross shafts (5). The planetary gears (3) and half-shaft gears (4) mesh with each other. There are two planetary cross shafts (5), and a connecting groove (51) is provided in the middle of the planetary cross shaft (5). The two planetary cross shafts (5) are connected to each other through the connecting groove (51). A placement groove (11) is provided inside the differential gear (1). The end of the planetary cross shaft (5) is installed in the placement groove (11). The two sides of the end of the planetary cross shaft (5) are planar structures (52), and wear-resistant strips (53) are formed on the planar structures (52). There are two wear-resistant strips (53), and the fixing strips are distributed along the axial direction of the planetary cross shaft (5). The planetary cross shaft (5) passes through the planetary gears (3).

2. A differential with a stable structure according to claim 1, characterized in that: The differential gear (1) has several fixing slots (12) inside. The fixing slots (12) and the placement slots (11) are distributed at intervals. Fastening bolts (6) are inserted in the fixing slots (12) and are connected to the differential housing (2).

3. A differential with a stable structure according to claim 1, characterized in that: The outer end of the planetary gear (3) is provided with an arc-shaped washer (7), which is sleeved on the planetary gear cross shaft (5).

4. A differential with a stable structure according to claim 1, characterized in that: A flat washer (8) is fitted on the half-shaft gear (4), and the outer end of the half-shaft gear (4) extends into the differential housing (2).

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