A differential assembly

Abstract

The application belongs to the technical field of differential mechanism and is specifically a differential mechanism assembly to solve the friction problem between the differential mechanism shell and the gear, which comprises a shell, planetary gears and half shaft gears, the planetary gears are uniformly arranged around the half shaft gears and are mutually meshed with the half shaft gears, the two ends of the planetary gears are installed in the planetary gear installation holes of the shell through bearings, and the half shaft gears are installed in the half shaft gear installation holes of the shell and are in a floating state in the installation holes and are meshed with the planetary gears to realize radial centering. Compared with the traditional differential mechanism, the half shaft gears of the differential mechanism assembly of the application do not contact the end face of the differential mechanism shell, the friction between the differential mechanism shell and the gear is sliding friction, the differential mechanism shell and the planetary gears are connected by bearings, the planetary gears do not contact the inner wall and the end face of the differential mechanism shell during work, the wear of the differential mechanism shell is effectively reduced, and the transmission efficiency is improved.

Description

Technical Field

[0001] This invention belongs to the field of differential technology, specifically a differential assembly. Background Technology

[0002] A differential is an automotive component assembly that effectively reduces wheel slippage and rotation caused by various factors such as turning or uneven road surfaces. It slows wheel wear, reduces power and fuel consumption, and improves a range of problems including difficult steering, deteriorating braking performance, and poor driving stability. It is widely used in light, medium, and heavy-duty trucks, off-highway vehicles, agricultural vehicles, forestry vehicles, and military vehicles.

[0003] The existing Torsen differential uses a parallel shaft helical gear structure. The gear directly contacts the inner wall and end face of the differential housing. The friction between the differential housing and the gear is sliding friction, which results in low transmission efficiency. During operation, the gear is in long-term contact with the housing, leading to wear of the differential and a short service life. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides a differential assembly that connects the differential housing and the gear through a bearing, so that the differential housing and the gear do not come into contact, thereby eliminating friction and improving transmission efficiency.

[0005] To achieve the above technical objectives, the present invention adopts the following technical solution: A differential assembly includes a housing, planetary gears, and axle gears. The planetary gears are evenly distributed around the axle gears and mesh with them. The two ends of the planetary gears are mounted in planetary gear mounting holes in the housing via bearings. The axle gears are mounted in the axle gear mounting holes in the housing and are in a floating state in the mounting holes, meshing with the planetary gears to achieve radial centering.

[0006] Furthermore, the planetary gear is equipped with a roller bearing at the large end and a needle roller bearing at the small end.

[0007] Furthermore, the planetary gears are divided into planetary gear I and planetary gear II, which mesh in a one-to-one correspondence and are evenly distributed around the half-shaft gear.

[0008] Furthermore, the large end of planetary gear I is installed in the left planetary gear mounting hole of the housing, and the small end of planetary gear I is installed in the right planetary gear mounting hole of the housing; planetary gear II is the opposite.

[0009] Furthermore, the half-shaft gear is separated from the housing by a shim and a spacer in the half-shaft gear mounting hole and is in a floating state.

[0010] Furthermore, the half-shaft gear is divided into half-shaft gear I and half-shaft gear II.

[0011] Furthermore, the half-shaft gear I is installed in the left half-shaft gear mounting hole of the housing, and the half-shaft gear II is installed in the right half-shaft gear mounting hole of the housing. Half-shaft gear I and half-shaft gear II are separated from the left and right housings by shims in the mounting holes, and the near ends of half-shaft gear I and half-shaft gear II are separated by spacers.

[0012] Furthermore, the shell is composed of a left shell and a right shell connected together.

[0013] Furthermore, the left and right shells are connected by bolts, cylindrical pins, and positioning sleeves.

[0014] Compared with traditional differentials, the half-shaft gear of the differential assembly of this invention does not contact the end face of the differential housing, the friction between the differential housing and the gear is sliding friction, and the differential housing and planetary gear are connected by bearings. During operation, the planetary gear does not contact the inner wall and end face of the differential housing, which effectively reduces the wear on the differential housing and improves the transmission efficiency. Attached Figure Description

[0015] Figure 1 : A three-dimensional structural schematic diagram of the differential assembly of the present invention; Figure 2 : A longitudinal cross-sectional view of the differential assembly of the present invention; Figure 3 : A cross-sectional view of the differential assembly of the present invention; In the diagram: 1. Bolt; 2. Left housing; 3. Washer; 4. Half-shaft gear I; 5. Roller bearing; 6. Needle roller bearing; 7. Planetary gear I; 8. Planetary gear II; 9. Spacer; 10. Half-shaft gear II; 11. Cylindrical pin; 12. Locating sleeve; 13. Right housing. Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] like Figures 1 to 3 As shown, the present invention provides a differential assembly, which consists of a left housing 2, a right housing 13, a planetary gear, a half-shaft gear, a roller bearing 5, and a needle roller bearing 6.

[0018] The left shell 2 and the right shell 13 are connected by bolts, cylindrical pins 11 and positioning sleeves 12. The right shell 13 has an oil passage hole to facilitate gear lubrication and heat dissipation.

[0019] Planetary gear I7 meshes with half-shaft gear I4, and planetary gear II8 meshes with half-shaft gear II10. There are three planetary gears I7 and three planetary gears II8, meshing in a one-to-one correspondence, evenly distributed around the half-shaft gears. The large ends of planetary gears I7 and II8 are fitted with roller bearings 5, and the small ends with needle roller bearings 6. The large end of planetary gear I7 is installed in the planetary gear mounting hole of the left housing 2, and the small end of planetary gear I7 is installed in the planetary gear mounting hole of the right housing 13. Planetary gear II8 is installed in the opposite manner, with its large end installed in the planetary gear mounting hole of the right housing 13 and its small end installed in the planetary gear mounting hole of the left housing 2.

[0020] Half-shaft gear I4 is installed in the half-shaft gear mounting hole of the left housing 2, and half-shaft gear II10 is installed in the half-shaft gear mounting hole of the right housing 13. The half-shaft gears are in a floating state in the mounting holes and mesh with the planetary gears to achieve radial centering. Half-shaft gears I4 and II10 are separated from the left housing 2 and the right housing 13 in the mounting holes by shims 3. The approach ends of half-shaft gears I4 and II10 are separated by spacers 9, so that half-shaft gears I4 and II10 are in a floating state in the mounting holes.

[0021] During operation, power is transmitted from the driven bevel gear to the differential housing, which drives the planetary gears to rotate. The planetary gears then drive the half-shaft gears on both sides to rotate, thus achieving power transmission.

[0022] When the rotational speeds of the two half-shaft gears are the same, the planetary gears are stationary relative to the housing and the planetary gears on the other side. If the speed of the housing remains constant, when the rotational speed of one half-shaft gear decreases, the planetary gear meshing with that side begins to rotate on its own axis as the housing's revolution speed remains constant. This drives the planetary gear meshing with it on the other side to rotate, and the planetary gear on the other side drives the half-shaft gear meshing with it to rotate, thus achieving differential speed.

Claims

1. A differential assembly, comprising a housing, planetary gears, and axle gears, characterized in that, The planetary gears are composed of planetary gears I (7) and II (8) that mesh in a one-to-one correspondence, and are evenly distributed around the half-shaft gears and mesh with each other. The large end of planetary gear I (7) is mounted in the planetary gear mounting hole of the left shell (2) of the housing through a bearing, and the small end of planetary gear I (7) is mounted in the planetary gear mounting hole of the right shell (13) of the housing through a bearing; planetary gear II (8) is the opposite. The half-shaft gear is composed of half-shaft gear I (4) and half-shaft gear II (10); half-shaft gear I (4) is installed in the half-shaft gear mounting hole of the left shell (2) of the housing, and half-shaft gear II (10) is installed in the half-shaft gear mounting hole of the right shell (13) of the housing. The half-shaft gear I (4) and half-shaft gear II (10) are separated from the housing by a gasket (3) in the mounting hole, and the near ends of half-shaft gear I (4) and half-shaft gear II (10) are separated by a spacer (9) to form a floating state; The half-shaft gear meshes with the planetary gear to achieve radial centering.

2. A differential assembly according to claim 1, characterized in that, The planetary gear is fitted with a roller bearing (5) at the large end and a needle roller bearing (6) at the small end.

3. A differential assembly according to claim 1, characterized in that, The shell is composed of a left shell (2) and a right shell (13) connected together.

4. A differential assembly according to claim 3, characterized in that, The left shell (2) and the right shell (13) are connected by bolts (1), cylindrical pins (11), and positioning sleeves (12).

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