Split double-bearing type rear axle driving assembly of electric vehicle

Abstract

The split double-bearing type rear axle driving assembly of the electric vehicle comprises an axle tube, an axle tube brake disc end bearing hole and a flange plate end machining bearing hole are formed in the two ends of the axle tube, a brake disc is installed at the end, provided with the axle tube brake disc end bearing hole, of the axle tube brake disc end bearing hole, and the flange plate end machining bearing hole is provided with a flange plate end machining bearing hole. A six-hole flange plate is installed at the end, provided with the flange plate end machining bearing hole, of the axle tube brake disc end bearing hole, a first bearing is connected in the axle tube brake disc end bearing hole in a sleeved mode, and a second bearing is connected in the flange plate end machining bearing hole in a sleeved mode. The second bearing is arranged in the bearing hole machined in the flange plate end, one end of the half shaft is supported, and the situation that due to the fact that one end of the axle pipe is not concentric with the half shaft, the half shaft rotates abnormally and is blocked, and even abnormal sound and oil leakage of a differential box are caused is avoided; after the second bearing is used for supporting, it can be guaranteed that the coaxiality precision of the axle tube and the half shaft is high, the vehicle running resistance is small, the endurance mileage is effectively prolonged, and the practicability of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of rear axles, in particular to a split double-bearing rear axle drive assembly of an electric vehicle. Background Art

[0002] Currently in the electric tricycle industry, in the drum brake split rear axle, only one end of the brake disc in the bridge tube has a 6205 bearing, and the end of the flange connected to the differential case has no bearing support. This structure will cause some problems, resulting in poor verticality between the bridge tube bearing hole and the mounting flange surface, causing eccentricity when the half-axle is pressed and non-concentricity with the differential case assembly, resulting in poor rotation flexibility of the rear axle, abnormal sound and noise of the differential case, short cruising range, oil leakage of the differential case and other abnormalities. For this reason, an electric vehicle split double-bearing rear axle drive assembly is proposed. Utility Model Content

[0003] The utility model aims to solve one of the technical problems existing in the prior art or related technology.

[0004] To this end, the technical solution adopted in this utility model is:

[0005] A split dual-bearing rear axle drive assembly for an electric vehicle comprises a bridge tube, wherein two ends of the bridge tube are provided with bearing holes at the bridge tube brake disc end and bearing holes processed at the flange disc end, the end of the bearing hole at the bridge tube brake disc end having the bearing hole at the bridge tube brake disc end having the bearing hole at the bridge tube brake disc end having the bearing hole processed at the flange disc end having a six-hole flange disc installed, a bearing 1 is sleeved in the bearing hole at the bridge tube brake disc end, a bearing 2 is sleeved in the bearing hole processed at the flange disc end, and half shafts are connected to the middle parts of bearings 1 and 2, one end of the half shaft passes through bearing 2 and is connected to an oil seal and bearing 3, the other end of the half shaft passes through bearing 1 and is connected to a brake drum, and a brake pad is connected to the outside of the brake disc.

[0006] Preferably, the half shaft and the bridge tube are coaxial structures, and the half shaft is arranged in the inner cylinder of the bridge tube and has no contact with the bridge tube.

[0007] Preferably, the aperture value of the bearing hole at the brake disc end of the bridge tube is larger than the aperture value of the bearing hole processed at the flange end, and the diameter value of bearing one is larger than the diameter value of bearing two.

[0008] Preferably, the brake disc and the six-hole flange are both fixedly mounted on the outer side of the bridge tube by welding.

[0009] By adopting the above technical solution, the beneficial effects achieved by the utility model are as follows:

[0010] In the utility model, a second bearing is arranged in the bearing hole processed at the flange end to support the other end of the half-shaft, so as to avoid that one end of the bridge tube and the half-shaft are not concentric, resulting in abnormal rotation of the half-shaft, jamming, and even abnormal noise and oil leakage of the differential case. After supporting with the second bearing, the coaxiality accuracy of the bridge tube and the half-shaft can be guaranteed to be high, the vehicle running resistance is small, the cruising range is effectively extended, and the practicality of the device is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 A schematic diagram of a bridge pipe according to an embodiment of the utility model;

[0012] Figure 2 A cross-sectional schematic diagram of an embodiment of the utility model;

[0013] Figure 3 This is a schematic diagram of an assembly of an embodiment of the utility model.

[0014] Reference numerals:

[0015] 1. Bearing hole at the brake disc end of the bridge tube; 2. Processed bearing hole at the flange end; 3. Brake disc; 4. Bridge tube; 5. Six-hole flange; 6. Bearing one; 7. Bearing two; 8. Half shaft; 9. Oil seal; 10. Bearing three; 11. Brake drum; 12. Brake block. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. It should be noted that the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

[0017] A split dual-bearing rear axle drive assembly for an electric vehicle provided by some embodiments of the utility model will be described below in conjunction with the accompanying drawings.

[0018] Example:

[0019] Combination Figure 1-3As shown, the utility model provides a split double-bearing rear axle drive assembly for an electric vehicle, including a bridge tube 4, two ends of the bridge tube 4 are provided with a bridge tube brake disc end bearing hole 1 and a flange end processing bearing hole 2, the end of the bridge tube brake disc end bearing hole 1 is provided with a brake disc 3, and the end of the bridge tube brake disc end bearing hole 1 is provided with a flange end processing bearing hole 2 is provided with a six-hole flange 5, the brake disc 3 and the six-hole flange 5 are both welded and fixedly installed on the outside of the bridge tube 4, the bearing hole 1 at the bridge tube brake disc end is sleeved with a bearing 6, and the flange end A bearing 2 7 is sleeved in the machined bearing hole 2, the aperture value of the bearing hole 1 at the brake disc end of the bridge tube is larger than the aperture value of the machined bearing hole 2 at the flange end, and the diameter value of the bearing 1 6 is larger than the diameter value of the bearing 2 7, and the middle parts of the bearing 1 6 and the bearing 2 7 are connected with a half-shaft 8, the half-shaft 8 and the bridge tube 4 are coaxial structures, and the half-shaft 8 is arranged in the inner cylinder of the bridge tube 4 and has no contact with the bridge tube 4, one end of the half-shaft 8 passes through the bearing 2 7 and is connected with an oil seal 9 and a bearing 3 10, the other end of the half-shaft 8 passes through the bearing 1 6 and is connected with a brake drum 11, and the outer side of the brake disc 3 is connected with a brake block 12.

[0020] Specifically, bearing three 10 is used to connect the half-shaft 8 and the differential case, so that the rotation of the half-shaft 8 is more stable, while reducing the friction between the half-shaft 8 and the differential case, and extending the service life. At the same time, bearing two 7 is used to fill the bearing hole 2 processed at the flange end to fill the gap between the bridge tube 4 and the half-shaft 8, further enhancing the supporting strength, avoiding the bending of the half-shaft 8, effectively ensuring the rotation of the half-shaft 8, and improving the practicability of the device.

[0021] The working principle and use process of the utility model are as follows: first, the half-shaft 8 is sleeved inside the bridge tube 4, and then the bearing 1 6 and the bearing 2 7 are sleeved on the two ends of the half-shaft 8 respectively, and fixed in the bearing hole 1 at the brake disc end of the bridge tube and the bearing hole 2 processed at the flange end to realize the installation of the half-shaft 8. After that, one end of the half-shaft 8 installed with the bearing 2 7 is inserted into the differential case, and the sealing and rotation connection are realized by the oil seal 9 and the bearing 3 10. Finally, the brake drum 11 and the brake block 12 are installed on the other end of the half-shaft 8, and the installation is completed and it can be used.

[0022] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A split dual-bearing rear axle drive assembly for an electric vehicle, comprising a bridge tube (4), characterized in that: The two ends of the bridge tube (4) are provided with a bearing hole (1) at the end of the bridge tube brake disc and a bearing hole (2) at the end of the flange. The end of the bearing hole (1) at the end of the bridge tube brake disc is provided with a brake disc (3), and the end of the bearing hole (1) at the end of the bridge tube brake disc is provided with a six-hole flange (5). The bearing hole (1) at the end of the bridge tube brake disc is sleeved with a bearing 1 (6), and the bearing hole (2) at the end of the flange is sleeved with a bearing 2 (7), and the middle parts of the bearing 1 (6) and the bearing 2 (7) are both connected with a half shaft (8), one end of the half shaft (8) passes through the bearing 2 (7) and is connected with an oil seal (9) and a bearing 3 (10), the other end of the half shaft (8) passes through the bearing 1 (6) and is connected with a brake drum (11), and the outer side of the brake disc (3) is connected with a brake block (12).

2. The split dual-bearing rear axle drive assembly of an electric vehicle according to claim 1, characterized in that: The half shaft (8) and the bridge tube (4) are coaxial structures, and the half shaft (8) is arranged in the inner cylinder of the bridge tube (4) and has no contact with the bridge tube (4).

3. The electric vehicle split dual-bearing rear axle drive assembly according to claim 1, characterized in that: The aperture value of the bearing hole (1) at the brake disc end of the bridge tube is larger than the aperture value of the bearing hole (2) processed at the flange end, and the diameter value of the first bearing (6) is larger than the diameter value of the second bearing (7).

4. The split dual-bearing rear axle drive assembly of an electric vehicle according to claim 1, characterized in that: The brake disc (3) and the six-hole flange (5) are both fixedly mounted on the outside of the bridge tube (4) by welding.

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