Low noise lubrication device for a vehicle final drive

Abstract

The utility model provides a low -noisy lubricating device of vehicle main speed reducer, it includes casing, flange assembly, first bearing, elastic spacer, second bearing, differential assembly, its characterized in that: be equipped with with differential assembly corresponding cooperation's baffle oil groove in the casing, baffle oil groove is connected through support and the bearing cover in differential assembly, is equipped with with first bearing corresponding cooperation's wear -reducing gasket on flange assembly. The utility model simple structure, facilitate in prior art structure embodiment, and the implementation cost is low, has reduced differential assembly's oil stirring loss, thereby has improved transmission efficiency, has reduced the noise when flange works.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts, specifically a low-noise lubrication device for a vehicle's main reducer. Background Technology

[0002] The final drive is an important component of the rear axle of a car and a vital part of the rear axle. The function of the final drive is to transmit the engine torque from the transmission device to the differential, and to increase the torque and reduce the speed accordingly during the power transmission process. Therefore, factors to consider when selecting a final drive include service life, transmission efficiency, weight, and operating noise.

[0003] Factors affecting transmission efficiency include gear type and parameters, lubricating oil viscosity, lubrication method, bearing type and lubrication and sealing, gear installation accuracy, and bearing preload. Noise during main reducer operation primarily originates from gear stiffness, wear and meshing conditions, bearing installation accuracy and wear, slippage between metal parts such as gear shafts, flanges, and bearings, oil viscosity and contamination, and the effects of engine and vehicle body vibration.

[0004] The lower part of the gear is immersed in lubricating oil. When the reducer is running, the gear agitates the lubricating oil, which makes the main gear well lubricated. However, the more the gear is immersed in oil, the greater the oil agitation loss, and the more it affects the transmission efficiency.

[0005] During operation, the rod-shaped main gear shaft will generate a certain torsional angle under the action of torque, which will cause slippage between the metal parts mounted on the drive shaft of the flange assembly, thus producing sound and generating noise. Utility Model Content

[0006] The present invention aims to overcome the shortcomings of the prior art by providing a low-noise lubrication device for a vehicle main reducer.

[0007] This application provides the following technical solution: A low-noise lubrication device for a vehicle main reducer includes a housing, a flange assembly, a first bearing, an elastic spacer, a second bearing, and a differential assembly. The device is characterized by having an oil baffle groove inside the housing that corresponds to and cooperates with the differential assembly; the oil baffle groove is connected to a bearing cap in the differential assembly via a bracket; and a friction-reducing pad corresponding to and cooperating with the first bearing is fitted onto the flange assembly.

[0008] Based on the above technical solutions, the following further technical solutions are also possible: The oil baffle groove has an arc-shaped groove structure, and part of the differential assembly is located inside the oil baffle groove.

[0009] A polymer coating is provided on the surface of the friction-reducing pad.

[0010] Advantages of utility models; This utility model has a simple structure, is easy to implement in existing structures, and has low implementation cost. By agitating the oil in the oil baffle of the differential assembly instead of directly agitating the oil in the axle, the oil agitation loss is reduced, thereby improving transmission efficiency. The high-polymer coating on the surface of the flange and the anti-friction pad does not produce the sound of metal-to-metal friction when sliding occurs, thus playing a role in noise reduction. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0012] like Figure 1 As shown, a low-noise lubrication device for a vehicle's main reducer includes a housing 1. A differential assembly 6 is installed within the housing 1. The differential assembly 6 includes a differential case, half-shaft gears, half-shaft gear washers, planetary gears, planetary gear washers, a slotted shaft, and a driven gear 9. Since this is prior art, its structure will not be described in detail here. A bearing cover 7 is installed on the differential case.

[0013] An oil baffle 5 with an arc-shaped groove structure is provided, and oil is contained in the oil baffle 5. A portion of the driven gear 9 is inserted into the oil baffle 5. A bracket 5a is connected to the outer wall of the oil baffle 5, and one end of the bracket 5a is connected and fixed to the bearing cover 7.

[0014] A flange assembly 2 is inserted into the housing 1. The flange assembly 2 is also existing technology and will not be described in detail here. The drive shaft of the flange assembly 2 is inserted into the housing 1, and a friction-reducing shim 8, a first bearing 3, an elastic spacer 4, and a second bearing 5 are sequentially fitted onto it. Finally, it forms a transmission engagement with the driven gear 9 of the differential assembly 6 through the drive gear 10. The elastic spacer 4 is also a mature component in existing technology, and its structure, material, and shape will not be described in detail here.

[0015] A polymer coating is provided on the surface of the friction-reducing pad 8.

[0016] Working principle: Because the driven gear in the differential assembly agitates the oil in the oil baffle rather than directly agitating the oil in the axle housing, the power loss caused by oil agitation is greatly reduced, thereby improving transmission efficiency. When the flange assembly transmits large torque, the drive shaft of the flange assembly contacts the polymer coating on the surface of the anti-friction pad, and no metal-to-metal friction noise is emitted when sliding occurs, thereby reducing the noise of the main reducer.

Claims

1. A low-noise lubrication device for a vehicle main reducer, comprising a housing (1), a flange assembly (2), a first bearing (3), an elastic spacer (4), a second bearing, and a differential assembly (6), characterized in that: An oil baffle (5) is provided in the housing (1) to cooperate with the differential assembly (6). The oil baffle (5) is connected to the bearing cover (7) in the differential assembly (6) through a bracket. A friction-reducing pad (8) is fitted on the flange assembly (2) to cooperate with the first bearing (3).

2. The low-noise lubrication device for a vehicle main reducer according to claim 1, characterized in that: The oil baffle groove (5) is an arc-shaped groove structure, and part of the differential assembly (6) is located in the oil baffle groove (5).

3. The low-noise lubrication device for a vehicle main reducer according to claim 1, characterized in that: A polymer coating is provided on the surface of the friction-reducing pad (8).

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