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Differential gear connecting structure

A gear connection and differential technology, applied in the field of auto parts, can solve the problems of low gear precision, limited torque transmission capacity, increased bolts, etc., and achieve the effect of reducing weight, improving torque transmission capacity, and reducing processes

Pending Publication Date: 2020-04-17
双环传动(重庆)精密科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The assembly method of the differential housing and the driven gear is generally connected by bolts and / or riveted by rivets in the prior art. These conventional methods all have the following problems: 1. The existing bolt connection method is because the differential housing and the The gears are all connected by finished products. Due to the manufacturing tolerance of the parts, the actual precision of the gears is relatively low; 2. The differential case and gears need to be drilled, tapped, and there are many processes, and bolts are added, which is costly; 3. 1. Because the parts of the two connecting parts need to overlap a part, the weight is heavy; 4. Because the torque is transmitted by the friction force generated by the bolt pre-tightening force, its transmission torque capacity is limited

Method used

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Examples

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Effect test

Embodiment 1

[0031] Example 1, please refer to Figure 1~2 , the present invention provides a differential gear connection structure, including a differential case 1 and a driven gear 2, the differential case 1 is provided with an assembly shaft section 11 for assembling the driven gear 2, The driven gear 2 is assembled on the assembly shaft section 11, and the assembly shaft section 11 and the driven gear 2 are connected through a spline 4, and the spline 4 connection is adopted, and then the teeth are ground after heat, and finally The design accuracy of the driven gear 2 is greatly improved, the NVH performance is improved, the process and parts are greatly reduced, the cost is reduced, and the weight is also reduced. The use of spline 4 coupling can also greatly improve the ability to transmit torque. The assembly shaft section 11 is provided with an external spline 4, the inner hole of the driven gear 2 is provided with an internal spline 4, the internal spline 4 and the external spl...

Embodiment 2

[0034] Example 2, please refer to Figure 3~4 A first inclined surface 33 is provided on the side of the locking groove 32 away from the step, and a second inclined surface having the same angle as the first inclined surface 33 is arranged on a position corresponding to the first inclined surface 33 of the locking groove 32 . Corresponding first slope 33 and second slope are set on the slot 32 and the collar 31, so that the collar 31 has a self-locking function, no pad selection is required, and the friction self-locking principle of the slope is used to prevent falling off. There is a slope, and the collar is reasonably designed to realize the limit of the collar without backlash. At the same time, due to the clamping force of the snap ring, the axial gap F of the driven gear 2 can be effectively eliminated to control the axial size of the driven gear 2, and the axial transmission of the driven gear 2 can be effectively controlled and prevented, and the driven gear 2 can be e...

Embodiment 3

[0036] Embodiment three, please refer to Figure 5~6 , the stopper is a pin shaft 34, and the spline 4 adopts an interference design and a pin limit method to limit the axial width to improve safety, and the end of the assembly shaft section 11 away from the step is provided with a pin for installation The installation hole of the shaft 34, the interference fit between the pin shaft 34 and the installation hole, so that the interference fit between the pin shaft 34 and the installation hole prevents the pin shaft 34 from falling off during the rotation process, and the installation hole is arranged on the circumference of the assembly shaft section 11 face. The stopper is provided with the pin shaft 34, which can be completed by only drilling a small amount of mounting holes on the assembly shaft section 11, and the installation of the pin shaft 34 is simple and convenient.

[0037] As a further improvement to the above technical solution, at least two pin shafts 34 are provi...

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Abstract

The invention provides a differential gear connecting structure. The differential gear connecting structure comprises a differential shell and a driven gear, wherein the differential shell is providedwith an assembly shaft section used for assembling the driven gear, the driven gear is assembled on the assembly shaft section, and the assembly shaft section is connected with the driven gear through a spline. By adoption of the spline for linkage, the capacity of transferring torque can be greatly improved, an outer spline body is arranged on the assembly shaft section, an inner spline body isarranged at an inner hole of the driven gear and is in interference fit with the outer spline body, one end of the assembly shaft section is provided with a step, the other end of the assembly shaft section is provided with a check block used for stopping axial displacement of the driven gear, and the driven gear is installed between the step and the check block. Through the two modes of interference fit by the spline bodies and axial limiting by the check block, double insurance is achieved, and risks are reduced. After the spline bodies are linked together, gear grinding is then conducted, and the meshing progress of the driven gear can be accelerated. Moreover, the cost and weight can be lowered, and the quality can be improved.

Description

technical field [0001] The invention relates to the technical field of auto parts, in particular to a differential gear connection structure. Background technique [0002] The differential can make the left and right (or front and rear) driving wheels of the car rotate at different speeds, and is an essential part of the motor vehicle. The power of the engine enters the differential through the transmission shaft, specifically through the driving and driven gears arranged on the transmission shaft, and the driven and driven gears on the differential case, and the driven gears mesh to transmit torque. The assembly method of the differential case and the driven gear is generally connected by bolts and / or riveted by rivets in the prior art. These conventional methods all have the following problems: 1. The existing bolt connection method is because the differential case and the The gears are all connected by finished products. Due to the manufacturing tolerance of the parts, t...

Claims

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Application Information

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IPC IPC(8): F16H48/38
CPCF16H48/38
Inventor 范钰琢罗箭孟永财彭文忠
Owner 双环传动(重庆)精密科技有限责任公司
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