Differential shell anti-skid structure for preventing ball bearing from running

Abstract

The utility model belongs to the technical field of bearing installation, and particularly discloses a differential shell anti-skid structure for preventing a ball bearing from running, which comprises a transmission shaft, a bearing, a differential shell and a rubber ring, the outer ring of the bearing is installed in a bearing installation hole of the differential shell, and the inner ring of the bearing is sleeved on the shaft neck of the transmission shaft; an outer wall groove is formed in a shaft neck of the transmission shaft, an end face groove is formed in a shaft shoulder of the transmission shaft, and rubber rings are arranged in the outer wall groove and the end face groove. The outer wall groove and the end face groove are the same in structure. The anti-skid structure is an improvement on an existing structure, the research and development cost is reduced, and the use effect is good; according to the anti-skidding structure, the shaft groove and the rubber ring are arranged, so that the friction coefficient between the differential shell and the bearing inner ring is increased, and the bearing inner ring is not prone to skidding and running.

Description

TECHNICAL FIELD

[0001] The utility model belongs to bearing installation technical field, concretely relates to a differential shell antiskid structure of preventing ball bearing from racing. BACKGROUND

[0002] The differential mechanism of traditional fuel vehicle generally selects tapered roller bearing at differential position, and new energy vehicle gradually starts to use ball bearing in pure electric and hybrid vehicle due to the pursuit of energy efficiency. Compared with tapered roller bearing of line contact, ball bearing of point contact has lower rotating friction resistance and smaller vibration noise value. However, the differential shell is the last output end of the transmission mechanism, and the torque is maximum, so that the supporting bearing needs to bear larger radial and axial load. The bearing inner ring is prone to slip and race on the shaft, which reduces the service life of the bearing and the stability of the transmission system. It threatens the safe and stable operation of the vehicle. SUMMARY

[0003] In view of the problems in the background art, the utility model provides a differential shell antiskid structure for preventing ball bearing from racing.

[0004] To achieve the above object, the utility model adopts the following technical scheme: a differential shell antiskid structure for preventing ball bearing from racing, which comprises a transmission shaft, a bearing, a differential shell and a rubber ring, the bearing outer ring is installed in the bearing mounting hole of the differential shell, and the bearing inner ring is sleeved on the journal of the transmission shaft;The journal of the transmission shaft is provided with an outer wall groove, and the shoulder of the transmission shaft is provided with an end face groove, the outer wall groove and the end face groove are both provided with a rubber ring, the diameter of the cross section of the rubber ring is r, and the outer diameter of the rubber ring is R;The outer wall groove and the end face groove are the same structure.

[0005] The distance between the outer wall groove and the shoulder is less than the width of the bearing inner ring.

[0006] The distance between the end face groove and the journal is less than the thickness of the bearing inner ring.

[0007] The groove width of the outer wall groove and the end face groove is d, and r+0.1mm≦d≦r+0.3mm.

[0008] The groove depth of the outer wall groove and the end face groove is h, and 0.8r≦h≦0.9r.

[0009] The rubber ring is made of soft material, the outer diameter of the transmission shaft is a, and R-3mm≦a≦R-1mm.

[0010] The utility model discloses an anti -skidding structure of differential shell of preventing ball bearing from running a circle, the anti -skidding structure is the improvement on the prior art structure, has reduced the cost of research and development, and the effect of using is good, the anti -skidding structure is through setting up the shaft groove and rubber ring, increases the friction coefficient between differential shell and bearing inner race, makes bearing inner race not easy to appear the condition of skidding and running a circle. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is the front view of the utility model.

[0012] Figure 2 It is the half cutaway view of transmission shaft.

[0013] Figure 3 It is the enlarged view of A.

[0014] Figure 4 It is the enlarged view of B.

[0015] In the drawing: 1, transmission shaft, 2, bearing, 3, differential shell, 4, rubber ring, 5, outer wall groove, 6, end face groove. DETAILED DESCRIPTION

[0016] The technical scheme of the utility model will be described clearly and completely below in connection with the drawings of the specification, obviously, the described embodiment is only a part of the embodiment of the utility model, not all the embodiment, based on the embodiment in the utility model, all other embodiments that the ordinary skill in the art person obtains without making the creative labor belong to the range of protection of the utility model.

[0017] The utility model discloses a kind of anti-skid structures of differential case for preventing ball bearing from running, including transmission shaft 1, bearing 2, differential case 3 and rubber ring 4, the outer ring of bearing 2 is installed in the bearing mounting hole of differential case 3, the inner ring of bearing 2 is sleeved at the journal of transmission shaft 1;The journal of transmission shaft 1 is equipped with outer wall groove 5, the shoulder of transmission shaft 1 is equipped with end face groove 6, outer wall groove 5 and end face groove 6 are equipped with rubber ring 4, the diameter of the cross section of rubber ring 4 is r, the outer diameter of rubber ring 4 is R;The rubber ring 4 is soft material, the outer diameter of transmission shaft 1 is a, R-3mm≦a≦R-1mm;The outer diameter of rubber ring 4 is greater than the outer diameter of transmission shaft 1 1~3mm, after rubber ring 4 is installed, rubber ring 4 and transmission shaft 1 are closely combined, to improve the friction coefficient between transmission shaft 1 and the inner ring of bearing 2;The structure of outer wall groove 5 and end face groove 6 is same;The distance between the shoulder of outer wall groove 5 is less than the width of the inner ring of bearing 2;In the embodiment, outer wall groove 5 is equipped with two, here can change the quantity of outer wall groove 5 according to specific requirement;For example, when the inner ring of bearing 2 is small, the quantity of outer wall groove 5 can be reduced, otherwise the quantity of outer wall groove 5 can be increased;The outer wall groove 5 is located on the contact surface of the inner ring of bearing 2 and the journal of transmission shaft 1;The distance between the journal of end face groove 6 is less than the thickness of the inner ring of bearing 2;When bearing 2 is installed, the inner side of the inner ring of bearing 2 is contacted with the shoulder of transmission shaft 1, and the end face groove 6 is located on the contact surface of the inner ring of bearing 2 and the shoulder of transmission shaft 1;The groove width of outer wall groove 5 and end face groove 6 is d, r+0.1mm≦d≦r+0.3mm;The width of end face groove 6 is slightly greater than the diameter of rubber ring 4, so as to place rubber ring 4, and leave compression space;The groove depth of outer wall groove 5 and end face groove 6 is h, 0.8r≦h≦0.9r;The depth of outer wall groove 5 and end face groove 6 is 0.8~0.9 times of the diameter of rubber ring 4, when bearing 2 is installed, rubber ring 4 is compressed, can fill outer wall groove 5 or end face groove 6, only a small part of volume is stretched out groove and contacted with bearing 2, reduce the difficulty of bearing 2 installation;

[0018] In the embodiment, outer wall groove 5 and end face groove 6 are simultaneously arranged, in actual use, the quantity of outer wall groove 5 and end face groove 6 can be changed according to specific use condition;For example, only outer wall groove 5 or end face groove 6 is arranged;The purpose is to make the friction coefficient between transmission shaft 1 and the inner ring of bearing 2 greater than the friction coefficient of bearing 2;In the embodiment, outer wall groove 5 and end face groove 6 are located on the contact surface of the inner ring of bearing 2 and transmission shaft 1, in actual use, if the outer ring of bearing 2 and differential case 3 slip and run, the present scheme can also be simultaneously or separately used between the outer ring of bearing 2 and differential case 3, to prevent the outer ring of bearing 2 and differential case 3 from slipping and running.

[0019] The utility model uses the following process: first, according to the parameter of transmission shaft 1 and bearing 2, the quantity and size of the outer wall groove 5 and end surface groove 6 required are calculated, and the appropriate rubber ring 4 is selected;Then install the rubber ring 4 in the outer wall groove 5 and end surface groove 6, install the transmission shaft 1 with the rubber ring 4 installed in the inner ring of bearing 2;In the rotating process, because the rubber ring 4 is soft material, and is closely combined with transmission shaft 1, when the torque of transmission shaft 1 suddenly becomes larger, the probability of skidding and running a circle can be effectively reduced.

[0020] The above only describes the preferred embodiment of the utility model and does not limit the utility model, and any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

[0021] The part not described in the utility model is prior art.

Claims

1. A differential housing anti-slip structure to prevent ball bearing slippage, comprising a drive shaft (1), a bearing (2), a differential housing (3), and a rubber ring (4), characterized in that: The bearing (2) outer ring is installed in the bearing mounting hole of the differential case (3), and the inner ring of the bearing (2) is sleeved on the journal of the transmission shaft (1); the journal of the transmission shaft (1) is provided with an outer wall groove (5), the shaft shoulder of the transmission shaft (1) is provided with an end face groove (6), the outer wall groove (5) and the end face groove (6) are both provided with rubber rings (4), the diameter of the cross section of the rubber ring (4) is r, and the outer diameter of the rubber ring (4) is R; the outer wall groove (5) and the end face groove (6) are the same in structure.

2. The anti-slip structure of the differential case according to claim 1, wherein: The distance between the outer wall groove (5) and the shaft shoulder is less than the width of the inner ring of the bearing (2).

3. The anti-slip structure of the differential case according to claim 1, wherein: The distance between the end face groove (6) and the journal is less than the thickness of the inner ring of the bearing (2).

4. The anti-slip structure of the differential case according to claim 1, wherein: The groove width of the outer wall groove (5) and the end face groove (6) is d, and r+0.1mm≦d≦r+0.3mm.

5. The anti-slip structure of the differential case according to claim 1, wherein: The groove depth of the outer wall groove (5) and the end face groove (6) is h, and 0.8r≦h≦0.9r.

6. The anti-slip structure of the differential case according to claim 1, wherein: The rubber ring (4) is made of soft material, the outer diameter of the transmission shaft (1) is a, and R-3mm≦a≦R-1mm.

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