Limited slip differential

Abstract

The utility model provides a limited slip differential, and belongs to the technical field of differential. The problem that the internal structure of a differential mechanism in the prior art is not stable enough is solved. The speed reducer comprises an outer shell, a bottom cover, a sleeve assembly, a differential assembly, a planet wheel assembly, a motor assembly and a speed reduction shaft assembly, the outer shell is connected with the bottom cover, the sleeve assembly and the planet wheel assembly are installed in the outer shell and the bottom cover, the sleeve assembly comprises a sleeve shell and sleeve joints, and the sleeve joints are fixedly installed at the two ends of the sleeve shell. A connecting convex body is formed on the sleeve shell, the differential mechanism assembly comprises a differential mechanism gear disc and a bevel gear shaft, and one end of the differential mechanism gear disc is attached to one end of the connecting convex body. The LED lamp has the advantages of being stable in structure and good in heat dissipation effect.

Description

Technical Field

[0001] The utility model belongs to the technical field of differentials and relates to a limited-slip differential. Background Art

[0002] A limited-slip differential is an improved differential that restricts wheel slip, referring to a type of differential where the rotational speed difference between the two driving wheels is allowed within a certain range to ensure normal driving performance such as turning.

[0003] Chinese Patent with Publication No. CN204099536U discloses a limited-slip differential, which includes a housing, a left end cover and a right end cover fixed at both ends of the housing. At the central positions of both ends of the housing, there are respectively a half-axle gear hole and three cylindrical helical gear holes corresponding to each other around the half-axle gear hole; concentric left and right half-axle gears are respectively installed in the half-axle gear holes. The cylindrical part at one end of the left half-axle gear is rotationally connected to the central hole of the left end cover, and the cylindrical part at one end of the right half-axle gear is rotationally connected to the central hole of the right end cover; three pairs of meshing left and right cylindrical helical gears are respectively installed in the corresponding three cylindrical helical gear holes. The other ends of the meshing left cylindrical helical gears are respectively meshed with the left half-axle gear, and the other ends of the meshing right cylindrical helical gears are respectively meshed with the right half-axle gear.

[0004] In the limited-slip differential provided by this patent, the left and right cylindrical helical gears pass through the three cylindrical helical gear holes to mesh with the gears. This structure of the limited-slip differential lacks a fixed limiting device, and there is a risk of looseness in the internal structure during operation. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a limited-slip differential for the above problems existing in the prior art.

[0006] The object of the present utility model can be achieved by the following technical solutions: A limited slip differential, comprising an outer housing, a bottom cover, a sleeve assembly, a differential assembly, a planetary gear assembly, a motor assembly and a reduction shaft assembly. The outer housing is connected to the bottom cover, and the sleeve assembly and the planetary gear assembly are installed inside the outer housing and the bottom cover. The sleeve assembly includes a sleeve housing and a sleeve joint. The sleeve joint is fixedly installed at both ends of the sleeve housing. A connecting convex body is formed on the sleeve housing. The differential assembly includes a differential gear disc and a bevel gear shaft. One end of the differential gear disc is in contact with one end of the connecting convex body. A fastening bolt is fixedly inserted through the connecting convex body. The planetary gear assembly includes a planetary gear and a central gear support. A plurality of connecting holes are provided on the sleeve housing. The planetary gear and the bevel gear shaft are both divided into a gear part and a shaft part. The shaft part of the planetary gear is fixedly connected to the connecting hole. The gear parts of the planetary gear and the bevel gear shaft are connected to the central gear support. A plurality of friction plates and driven plates are fixedly sleeved on the shaft part of the bevel gear shaft. The sleeve joint is fixedly sleeved on the bevel gear shaft and outside the friction plates and the driven plates.

[0007] In the above-mentioned limited slip differential, a wheel coupling is fixedly connected to the end of the shaft part of the bevel gear shaft. A driving gear disc is fixedly sleeved on the bevel gear shaft inside the wheel coupling. A fixing plate is fixedly sleeved on the bevel gear shaft inside the driving gear disc.

[0008] In the above-mentioned limited slip differential, a support bearing is fixedly sleeved outside the sleeve joint. A support bushing is fixedly sleeved outside the support bearing. An internal hexagonal screw is fixedly connected to the support bushing. The internal hexagonal screw is connected to the inside of the outer housing.

[0009] In the above-mentioned limited slip differential, a driving gear is fixed at one end of the motor assembly. The driving gear meshes with the driving gear disc.

[0010] In the above-mentioned limited slip differential, a reduction gear is fixed at one end of the reduction shaft assembly. The reduction gear meshes with the differential gear disc.

[0011] In the above-mentioned limited slip differential, heat dissipation holes are provided on the sleeve housing.

[0012] Compared with the prior art, the limited-slip differential provided by the utility model has the following beneficial effects: 1. By providing a connecting convex body on the sleeve housing, the non-gear surface of the differential gear disc is fitted with the connecting convex body, and the sleeve housing and the differential gear disc are fixed together by fastening bolts, which makes the fixation between the differential gear disc and the sleeve housing firm; 2. By opening a connecting hole on the sleeve housing, the shaft part of the planetary gear is connected to the connecting hole, and the gear part of the planetary gear extends into the central gear support, which makes the connection between the planetary gear assembly and the sleeve housing more stable; 3. By providing a fixing plate on the bevel gear shaft inside the driving gear disc, and connecting the fixing plate and the outer housing by internal hexagonal bolts, the structural stability of the utility model is improved; 4. By opening a rhombus-like heat dissipation hole on the sleeve housing, the heat dissipation inside the utility model is improved. Brief Description of the Drawings

[0013] Figure 1 is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 is an exploded schematic diagram of the utility model;

[0015] Figure 3 is a schematic diagram of the structure of the utility model with the outer housing and the bottom cover removed;

[0016] Figure 4 is a schematic diagram of the sleeve housing structure.

[0017] In the figure: 1. Outer housing; 2. Bottom cover; 3. Sleeve assembly; 31. Sleeve housing; 311. Connecting convex body; 312. Connecting hole; 313. Heat dissipation hole; 32. Sleeve joint; 33. Fastening bolt; 4. Differential assembly; 41. Differential gear disc; 42. Bevel gear shaft; 5. Planetary gear assembly; 51. Planetary gear; 52. Central gear support; 6. Motor assembly; 61. Driving gear; 7. Reduction shaft assembly; 71. Reduction gear; 8. Friction plate; 9. Driven plate; 10. Wheel coupling; 11. Driving gear disc; 12. Fixing plate; 13. Support bearing; 14. Support bushing; 141. Internal hexagonal screw. Detailed Description of the Preferred Embodiments

[0018] The following are specific embodiments of the utility model in combination with the drawings, and the technical solutions of the utility model are further described, but the utility model is not limited to these embodiments.

[0019] Such as Figures 1 to 4As shown in the figure, this embodiment includes a housing 1, a bottom cover 2, a sleeve assembly 3, a differential assembly 4, a planetary gear assembly 5, a motor assembly 6, and a reduction shaft assembly 7. The housing 1 is connected to the bottom cover 2, and the sleeve assembly 3 and the planetary gear assembly 5 are installed in the cavity formed inside the housing 1 and the bottom cover 2. The sleeve assembly 3 includes a sleeve housing 31 and sleeve joints 32. The number of sleeve joints 32 is two, and the sleeve joints 32 are symmetrically installed at both ends of the sleeve housing 31. A connecting convex body 311 is integrally formed on the sleeve housing 31. The differential assembly 4 includes a differential gear disc 41 and bevel gear shafts 42. The sleeve joints 32 are sleeved and fixed on the bevel gear shafts 42. One end of the non-gear surface of the differential gear disc 41 is attached to one end of the connecting convex body 311. A fastening bolt 33 passes through the connecting convex body 311 and is connected to the differential gear disc 41.

[0020] As Figures 1 to 3 shown in the figure, the planetary gear assembly 5 includes two planetary gears 51 and a central gear support 52. A number of connecting holes 312 are provided on the sleeve housing 31. Both the planetary gear 51 and the bevel gear shaft 42 are divided into a gear part and a shaft part. The shaft part of the planetary gear 51 is fixedly connected to the connecting holes 312. The gear parts of the planetary gear 51 and the bevel gear shaft 42 extend into the central gear support 52 and are connected to the central gear support 52.

[0021] As Figures 1 to 3 shown in the figure, the number of friction plates 8 and driven plates 9 is several, and the friction plates 8 and the driven plates 9 are alternately attached and fixed to the shaft part of the bevel gear shaft 42. The friction plates 8 and the driven plates 9 are located at the inner end of the sleeve housing 31. A wheel coupling 10 is fixedly connected to the end of the shaft part of the bevel gear shaft 42. A driving gear disc 11 is sleeved and fixed on the bevel gear shaft 42 inside the wheel coupling 10. A fixing plate 12 is sleeved and fixed on the bevel gear shaft 42 inside the driving gear disc 11. The fixing plate 12 is used to connect to the side plane of the housing 1. A support bearing 13 is sleeved and fixed outside the sleeve joint 32. A support bushing 14 is sleeved and fixed outside the support bearing 13. The support bearing 13 and the bearing bushing play a role in supporting and protecting the bevel gear shaft 42. An internal hexagonal screw 141 is fixedly connected to the support bushing 14. The internal hexagonal screw 141 is connected to the inside of the housing 1 to fix the support bushing 14 to the housing 1.

[0022] Further details are as follows. As Figure 3 shown in the figure, the number of motor assemblies 6 is two, and the motor assemblies 6 are installed on one side of the driving gear disc 11. A driving gear 61 is fixed at one end of the motor assembly 6. The driving gear 61 meshes with the driving gear disc 11, and the driving gear 61 drives the driving gear disc 11 to operate.

[0023] Further details are as follows. As Figure 3As shown, the reduction shaft assembly 7 is installed on one side of the differential gear disc 41. A reduction gear 71 is fixed at one end of the reduction shaft assembly 7, and the reduction gear 71 meshes with the differential gear disc 41.

[0024] For further details, as Figures 2 to 4 shown, diamond-shaped heat dissipation holes 313 are formed in the sleeve housing 31. The heat dissipation holes 313 of this structure have a relatively large area and good heat dissipation effect.

[0025] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar ways of substitution, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0026] Although various terms are used more frequently herein, the possibility of using other terms is not excluded. The use of these terms is only for more convenient description and explanation of the essence of the present invention; any interpretation of them as an additional limitation is contrary to the spirit of the present invention.

Claims

1. A limited-slip differential, comprising a housing (1), a bottom cover (2), a sleeve assembly (3), a differential assembly (4), a planet gear assembly (5), a motor assembly (6) and a reduction shaft assembly (7), wherein the housing (1) is connected to the bottom cover (2), and the sleeve assembly (3) and the planet gear assembly (5) are installed inside the housing (1) and the bottom cover (2), characterized in that: The sleeve assembly (3) includes a sleeve housing (31) and sleeve joints (32). The sleeve joints (32) are fixedly installed at both ends of the sleeve housing (31). A connecting convex body (311) is formed on the sleeve housing (31). The differential assembly (4) includes a differential gear disc (41) and bevel gear shafts (42). One end of the differential gear disc (41) is in contact with one end of the connecting convex body (311). A fastening bolt (33) is fixedly installed through the connecting convex body (311). The planetary gear assembly (5) includes planetary gears (51) and a central gear bracket (52). A number of connecting holes (312) are formed on the sleeve housing (31). Both the planetary gears (51) and the bevel gear shafts (42) are divided into gear parts and shaft parts. The shaft parts of the planetary gears (51) are fixedly connected to the connecting holes (312). The gear parts of the planetary gears (51) and the bevel gear shafts (42) are connected to the central gear bracket (52). A number of friction plates (8) and driven plates (9) are fixedly sleeved on the shaft parts of the bevel gear shafts (42). The sleeve joints (32) are fixedly sleeved on the bevel gear shafts (42) and outside the friction plates (8) and the driven plates (9).

2. The limited slip differential according to claim 1, wherein: A wheel coupling (10) is fixedly connected to the end of the shaft part of the bevel gear shaft (42). A driving gear disc (11) is fixedly sleeved on the bevel gear shaft (42) inside the wheel coupling (10). A fixing plate (12) is fixedly sleeved on the bevel gear shaft (42) inside the driving gear disc (11).

3. A limited-slip differential according to claim 1, characterized in that: A support bearing (13) is fixedly sleeved outside the sleeve joint (32). A support bushing (14) is fixedly sleeved outside the support bearing (13). An inner hexagon screw (141) is fixedly connected to the support bushing (14). The inner hexagon screw (141) is connected to the inside of the outer housing (1).

4. An LSD according to claim 1 or 2, wherein: One end of the motor assembly (6) is fixed with a driving gear (61). The driving gear (61) meshes with the driving gear disc (11).

5. A limited slip differential according to claim 1, characterized in that: One end of the reduction shaft assembly (7) is fixed with a reduction gear (71). The reduction gear (71) meshes with the differential gear disc (41).

6. The limited slip differential according to claim 1, wherein: Heat dissipation holes (313) are formed on the sleeve housing (31).

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