Differential mechanism with high sealing performance

Abstract

The utility model provides a differential mechanism with high sealing performance, and belongs to the technical field of differential mechanisms. The problem of insufficient sealing performance in the prior art is solved. The differential mechanism comprises a front shell, a rear shell, a front half assembly, a rear half assembly and a differential assembly, the front half assembly comprises a first sealing end cover, a second sealing end cover, a front side half shaft and a front half shaft gear, and a front convex body is formed on the inner side of the front half shaft gear; the rear half assembly comprises a third sealing end cover, a fourth sealing end cover, a rear side half shaft, a rear half shaft gear and a large half shaft gear, a rear convex body is formed on the inner side of the rear half shaft gear, the differential assembly comprises a planetary support and a planetary gear, and a front side mounting part and a rear side mounting part are formed in the front shell and the rear shell correspondingly; the planet support is connected with the front side installation part and the rear side installation part, locking pieces are fixedly arranged on the front side half shaft and the rear side half shaft in a sleeved mode and located in the front convex body and the rear convex body respectively, and a front elastic lining and a rear elastic lining are fixedly arranged on the front side half shaft and the rear side half shaft in a sleeved mode respectively. And the front elastic bushing and the rear elastic bushing are respectively contacted with the second sealing end cover and the third sealing end cover. The sealing structure has the advantage of being high in sealing performance.

Description

TECHNICAL FIELD

[0001] The utility model belongs to differential mechanism technical field relates to a kind of high sealing differential mechanism. BACKGROUND

[0002] In prior art differential mechanism, half shaft and shaft hole on differential mechanism shell are matched, due to machining precision limit, there is certain gap. Oil is easy to seep along gap during operation. If half shaft is impacted and vibrated to produce micro displacement during work, gap increases, and oil leakage risk is higher.

[0003] Chinese patent with patent publication number CN205654818U discloses an electric control locking differential mechanism, comprising a differential mechanism shell and a differential mechanism cover, the differential mechanism shell is provided with an installation cavity, two half shaft gears and a planetary shaft are arranged in the installation cavity, the planetary shaft is fixed in the installation cavity through a planet pin shaft, a planet gear meshing with the half shaft gear is sleeved on the planetary shaft, a locking tooth disc is further arranged in the installation cavity, the locking tooth disc is movably meshed with the adjacent half shaft gear, the connecting end of the locking tooth disc and the half shaft gear is provided with a end tooth, an elastic reset device making the locking tooth disc tend to move away from the half shaft gear is further arranged between the locking tooth disc and the half shaft gear; the bottom of the locking tooth disc is provided with a plurality of limiting columns, the bottom of the differential mechanism shell is provided with corresponding limiting holes, the limiting columns pass through the limiting holes and are connected with the push piece sleeved on the outer end of the differential mechanism shell; the outer end of the push piece is provided with a magnetic thrust device for pushing the locking tooth disc to move towards the half shaft gear.

[0004] In the electric control locking differential mechanism provided by the patent, the limiting column at the bottom of the locking tooth disc is connected with the push piece through the limiting hole at the bottom of the differential mechanism shell, and there is gap in the matching position. When the vehicle is running and vibrating or is impacted, the limiting column shakes in the limiting hole, which may make the gap larger, and lubricating oil is easy to seep from the position. UTILITY MODEL CONTENTS

[0005] The utility model aims at the above problems existing in prior art, and provides a kind of high sealing differential mechanism.

[0006] The utility model discloses a high sealing differential mechanism can through the following technical scheme to realize: a kind of high sealing differential mechanism, including front shell, rear shell, front half assembly, rear half assembly and differential assembly, the front half assembly includes first sealing end cover, second sealing end cover, front side half shaft and front half axle gear, the front half axle gear inside is formed with front convex body, the rear half assembly includes third sealing end cover, fourth sealing end cover, rear side half shaft, rear half axle gear and big half axle gear, the rear half axle gear inside is formed with rear convex body, the differential assembly includes planetary support and planetary gear, the front shell and rear shell inside are formed with front side mounting portion and rear side mounting portion respectively, the planetary support is connected with front side mounting portion and rear side mounting portion, locking piece is fixedly covered on the front side half shaft and rear side half shaft, the locking piece is located inside front convex body and rear convex body respectively, front elastic bushing and rear elastic bushing are fixedly covered on the front side half shaft and rear side half shaft respectively, and the front elastic bushing and rear elastic bushing are in contact with second sealing end cover and third sealing end cover respectively.

[0007] In the above-mentioned high sealing differential mechanism, the locking piece is annular and has a locking groove inside.

[0008] In the above-mentioned high sealing differential mechanism, the outer sides of the second sealing end cover and the third sealing end cover are formed with front sealing protrusions and rear sealing protrusions respectively.

[0009] In the above-mentioned high sealing differential mechanism, a shell gasket is arranged between the front shell and the rear shell.

[0010] In the above-mentioned high sealing differential mechanism, sealing rings are arranged on the front side half shaft and the rear side half shaft, and the sealing rings are located inside the first sealing end cover and the fourth sealing end cover.

[0011] In the above-mentioned high sealing differential mechanism, the rear shell is formed with a mounting seat at the outer end, the mounting seat is fixed with a spline, the big half axle gear is formed with a key groove, and the big half axle gear is fixedly connected with the mounting seat.

[0012] In the above-mentioned high sealing differential mechanism, one end of the fourth sealing end cover extends out of the big half axle gear and is connected with the big half axle gear.

[0013] Compared with the prior art, the high-sealing differential provided by this utility model has the following beneficial effects: 1. The second and third sealing end covers are provided with sealing protrusions, which can cooperate with other components to form a sealing structure; the front half shaft is fitted with a sealing ring inside the first sealing end cover; there is a housing gasket between the front housing and the rear housing, and the multi-part sealing design effectively prevents lubricating oil leakage, blocks the entry of external impurities, ensures a good working environment inside the differential, and extends its service life; 2. The locking part is annular and has a locking groove, which realizes reliable locking, prevents the half shaft from loosening during operation, and ensures stable power transmission. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the internal structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the exploded structure of this utility model.

[0017] In the diagram: 1. Front housing; 11. Front mounting part; 2. Rear housing; 21. Rear mounting part; 22. Mounting seat; 221. Spline; 3. Front half assembly; 31. First sealing end cover; 32. Second sealing end cover; 321. Front sealing protrusion; 33. Front half shaft; 34. Front half shaft gear; 341. Front protrusion; 4. Rear half assembly; 41. Third sealing end cover; 411. Rear sealing protrusion; 42. Fourth sealing end cover; 43. Rear half shaft; 44. Rear half shaft gear; 441. Rear protrusion; 45. Large half shaft gear; 451. Keyway; 5. Differential assembly; 51. Planetary support; 52. Planetary gear; 6. Locking element; 61. Locking groove; 7. Front elastic bushing; 8. Rear elastic bushing; 9. Housing gasket; 10. Sealing ring. Detailed Implementation

[0018] 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.

[0019] like Figures 1 to 3As shown, this embodiment of a high-sealing differential includes a front housing 1, a rear housing 2, a front half assembly 3, a rear half assembly 4, and a differential assembly 5. The inner end faces of the front housing 1 and the rear housing 2 are attached together and fixed by bolts. A housing gasket 9 is provided between the front housing 1 and the rear housing 2. The front half assembly 3 includes a first sealing end cover 31, a second sealing end cover 32, a front half shaft 33, and a front half shaft gear 34. The front half shaft 33 passes through the first sealing end cover 31, the second sealing end cover 32, and the front half shaft gear 34 in sequence. A front protrusion 341 is formed on the inner side of the front half shaft gear 34. A locking member 6 is sleeved and fixed on the front half shaft 33 that passes through the front protrusion 341. The locking member 6 is connected to the interior of the front protrusion 341. A front sealing protrusion 321 is formed on the outer side of the second sealing end cover 32. When the front housing 1 is installed, the front sealing protrusion 321 is attached to the inner wall of the front housing 1.

[0020] like Figures 1 to 3 As shown, the rear half assembly 4 includes a third sealing end cover 41, a fourth sealing end cover 42, a rear half shaft 43, a rear half shaft gear 44, and a large half shaft gear 45. A rear protrusion 441 is formed on the inner side of the rear half shaft gear 44. The rear half shaft 43 passes through the third sealing end cover 41 and the rear half shaft gear 44 in sequence. The rear protrusion 441 is formed on the inner side of the rear half shaft 44. The same locking member 6 is sleeved and fixed on the rear half shaft 43 that passes through the rear protrusion 441. The locking member 6 is connected to the interior of the rear protrusion 441. A rear sealing protrusion 411 is formed on the outer side of the third sealing end cover 41. When the rear housing 2 is installed, the rear sealing protrusion 411 fits against the inner wall of the rear housing 2. One end of the fourth sealing end cover 42 extends out of the large half shaft gear 45 and is connected to the large half shaft gear 45.

[0021] like Figures 1 to 3 As shown, the differential assembly 5 includes a planetary carrier 51 and a planetary gear 52. The planetary gear 52 is sleeved and fixed on the planetary carrier 51. The front housing 1 and the rear housing 2 are respectively formed with a front mounting part 11 and a rear mounting part 21. When the front housing 1 and the rear housing 2 are connected, the front mounting part 11 and the rear mounting part 21 are connected and spliced ​​together. The planetary carrier 51 is connected to the spliced ​​front mounting part 11 and the rear mounting part 21. The front half shaft 33 and the rear half shaft 43 are respectively sleeved and fixed with a front elastic bushing 7 and a rear elastic bushing 8. The front elastic bushing 7 and the rear elastic bushing 8 are in contact with the second sealing end cover 32 and the third sealing end cover 41, respectively.

[0022] To elaborate further, such as Figure 3 As shown, the locking member 6 is annular and has a locking groove 61 inside.

[0023] To elaborate further, such as Figures 1 to 3As shown, a mounting base 22 is formed at the outer end of the rear housing 2, a spline 221 is fixed on the mounting base 22, a keyway 451 is provided in the large half-shaft gear 45, and the large half-shaft gear 45 is fixedly connected to the mounting base 22.

[0024] To elaborate further, such as Figures 2 to 3 As shown, sealing rings 10 are fitted on both the front half-shaft 33 and the rear half-shaft 43, and the sealing rings 10 are located inside the first sealing end cover 31 and the fourth sealing end cover 42.

[0025] 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.

[0026] 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 high-sealing differential, comprising a front housing (1), a rear housing (2), a front half assembly (3), a rear half assembly (4), and a differential assembly (5), characterized in that: The front half assembly (3) includes a first sealing end cap (31), a second sealing end cap (32), a front half shaft (33), and a front half shaft gear (34). A front protrusion (341) is formed on the inner side of the front half shaft gear (34). The rear half assembly (4) includes a third sealing end cap (41), a fourth sealing end cap (42), a rear half shaft (43), a rear half shaft gear (44), and a large half shaft gear (45). A rear protrusion (441) is formed on the inner side of the rear half shaft gear (44). The differential assembly (5) includes a planetary carrier (51) and a planetary gear (52). The front housing (1) and the rear housing (2) are respectively formed inside. The planetary support (51) has a front mounting part (11) and a rear mounting part (21). The planetary support (51) is connected to the front mounting part (11) and the rear mounting part (21). Locking members (6) are fitted and fixed on the front half shaft (33) and the rear half shaft (43). The locking members (6) are located inside the front protrusion (341) and the rear protrusion (441), respectively. A front elastic bushing (7) and a rear elastic bushing (8) are fitted and fixed on the front half shaft (33) and the rear half shaft (43), respectively. The front elastic bushing (7) and the rear elastic bushing (8) are in contact with the second sealing end cap (32) and the third sealing end cap (41), respectively.

2. The high-sealing differential according to claim 1, characterized in that: The locking member (6) is annular and has a locking groove (61) inside.

3. A high-sealing differential according to claim 1, characterized in that: The second sealing end cap (32) and the third sealing end cap (41) are respectively provided with a front sealing protrusion (321) and a rear sealing protrusion (411).

4. A high-sealing differential according to claim 1, characterized in that: A housing gasket (9) is provided between the front housing (1) and the rear housing (2).

5. A high-sealing differential according to claim 1, characterized in that: A sealing ring (10) is fitted on both the front half-shaft (33) and the rear half-shaft (43), and the sealing ring (10) is located inside the first sealing end cap (31) and the fourth sealing end cap (42).

6. A high-sealing differential according to claim 1, characterized in that: The outer end of the rear housing (2) is provided with a mounting base (22), a spline (221) is fixed on the mounting base (22), a keyway (451) is provided in the large half-shaft gear (45), and the large half-shaft gear (45) is fixedly connected to the mounting base (22).

7. A high-sealing differential according to claim 1, characterized in that: One end of the fourth sealing end cap (42) extends out of the large half-shaft gear (45) and is connected to the large half-shaft gear (45).

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