CN206419460U - The sealing structure of alignment pin in car transmissions spline housing assembly - Google Patents

Abstract

The utility model provides a sealing structure for a positioning pin in a spline sleeve assembly of an automobile transmission system. The spline sleeve assembly includes a spline sleeve and a positioning pin. Lubricating oil is coated between the key and the spline sleeve, and the positioning pin includes a first connecting portion located in the spline sleeve, and the first connecting portion is connected with the end of the internal spline, including a A sealing ring on the outer peripheral wall of the first connecting part, through which the first connecting part is sealingly engaged with the inner wall of the spline sleeve. The utility model has the advantages of simple structure and novel design. By providing a sealing ring on the positioning pin, the positioning pin is sealed and matched with the inner wall of the spline sleeve, so that the dynamic leakage of lubricating oil can be prevented.

Description

Sealing structure of positioning pin in spline sleeve assembly of automobile transmission system

technical field

The utility model relates to a sealing structure technology, in particular to a sealing structure of a positioning pin in a spline sleeve assembly of an automobile transmission system.

Background technique

With the vigorous development and improvement of the automobile market, the understanding of vehicle NVH by various OEMs has gradually emerged. In order to improve the NVH of the vehicle transmission system and reduce the torsional vibration of the engine, a flexible coupling structure is usually used at the gearbox end. The spline structure adopted by the traditional coupling will have a large pressure on the spline teeth when transmitting large torque, which will cause the spline of the coupling to be unable to freely expand and contract due to friction factors. The Chinese invention patent specification with the application number 201210194541.3 discloses a static pressure spline device, which is composed of a spline shaft and a spline sleeve. In the gap where the oil film is formed, the spline sleeve is provided with a plurality of oil injection holes for filling the gap; between the two axial positioning surfaces of the spline shaft and the spline sleeve, there is a gap for compensating the axial displacement. The spline sleeve is connected with an end cover for sealing the spline sleeve and the spline shaft through bolts, and the pressure oil is injected into the gap between the two meshing tooth surfaces through the oil injection hole, thereby forming a certain gap between the two meshing tooth surfaces. Rigid oil film, and the two teeth are separated by the oil film, to ensure that there is no rigid contact between the spline shaft and the two teeth on the spline sleeve during torque transmission, and the rigid dry friction between the traditional spline pairs is changed to liquid friction , In the process of transmitting large torque, only a very small axial force can overcome the friction resistance between the two spline pairs, and realize axial deformation compensation. Although this structure realizes the change from rigid dry friction between traditional spline pairs to liquid friction, due to the riveting connection method between the positioning pin and the spline sleeve in the automobile transmission system, there are bumps and vibrations when the car is running. Under the action of the positioning sleeve up, down, left, and right, dynamic lubricating oil leakage will occur in the riveting connection gap between the positioning pin and the spline sleeve, which will cause customer complaints.

Utility model content

In view of the above-mentioned shortcomings of the prior art, the technical problem to be solved by the utility model is to provide a sealing structure for the positioning pin in the spline sleeve assembly of the automobile transmission system.

In order to achieve the above purpose, the utility model provides a sealing structure of the positioning pin in the spline sleeve assembly of the automobile transmission system. The spline sleeve assembly includes the spline sleeve and the positioning pin, and the spline sleeve is provided with an internal spline , lubricating oil is applied between the inner spline and the spline sleeve, the positioning pin includes a first connecting portion located in the spline sleeve, and the first connecting portion is connected to the end of the inner spline The connection includes a sealing ring provided on the outer peripheral wall of the first connecting part, and the first connecting part is sealingly engaged with the inner wall of the spline sleeve through the sealing ring.

Preferably, a pressure relief groove is provided on the outer peripheral wall of the first connecting part, and the sealing ring is located in the pressure relief groove.

Preferably, there is a pressure relief space between the sealing ring and the front side of the pressure relief groove, and the sealing ring is against the rear side of the pressure relief groove.

Preferably, the positioning pin is connected by riveting to the spline sleeve.

Preferably, the sealing ring is made of rubber.

Preferably, the positioning pin includes a second connecting portion protruding from a spline sleeve, and the positioning sleeve is sleeved on the second connecting portion.

As mentioned above, the sealing structure of the positioning pin in the spline sleeve assembly of the automobile transmission system involved in the utility model has the following beneficial effects: the utility model is simple in structure and novel in design. Sealing cooperation with the inner wall of the spline sleeve can prevent dynamic leakage of lubricating oil.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is the structural representation when the utility model works.

Figure 3 is an enlarged view of A in Figure 1.

Component designation description

1 spline sleeve

10 internal splines

11 lubricating oil

2 alignment pins

20 The first connecting part

21 sealing ring

22 pressure relief groove

221 Front side of pressure relief groove

222 Pressure relief space

223 Rear side of pressure relief groove

23 Second connection part

24 positioning sleeve

detailed description

The implementation of the present utility model is illustrated by specific specific examples below, and those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification.

It should be noted that the structures, proportions, sizes, etc. shown in the drawings attached to this specification are only used to match the content disclosed in the specification, for those who are familiar with this technology to understand and read, and are not used to limit the implementation of the utility model Therefore, it has no technical substantive meaning. Any modification of structure, change of proportional relationship or adjustment of size shall still fall within the scope of Within the scope covered by the technical content disclosed by the utility model. At the same time, terms such as "upper", "lower", "left", "right", and "middle" quoted in this specification are only for convenience of description, and are not used to limit the implementation of the present utility model. The change or adjustment of its relative relationship, without substantive changes in the technical content, should also be regarded as the scope of the utility model that can be implemented.

As shown in Figure 1, the utility model provides a sealing structure of a positioning pin in a spline sleeve assembly of an automobile transmission system. The spline sleeve assembly includes a spline sleeve 1 and a positioning pin 2, and the positioning pin 2 and the positioning pin The spline sleeve 1 is connected by riveting, and the spline sleeve 1 is provided with an internal spline 10, and lubricating oil 11 is applied between the internal spline 10 and the spline sleeve 1, and the positioning pin 2 includes a The first connecting portion 21 in the spline sleeve 1, the first connecting portion 21 is connected to the end of the inner spline 10, the positioning pin 2 also includes a second connecting portion 22, the second connecting portion The 23 is covered with a positioning sleeve 24. When the spline sleeve assembly is working, there are up and down bumps and movement when the car is running, and the force of the positioning sleeve 24 on the positioning pin 2 is shown at F in Figure 2. The position of the positioning pin 2 The second connecting portion 23 receives the force of up, down, left, and right, so that the dynamic lubricating oil 11 will leak in the caulking connection gap between the positioning pin 2 and the spline sleeve 1 .

The utility model is provided with the sealing structure of the positioning pin in the spline sleeve assembly to solve the above problems, including the sealing ring 22 arranged on the outer peripheral wall of the first connecting part 21, and the first connecting part 21 passes through the The sealing ring 22 is sealingly matched with the inner wall of the splined sleeve 1 so that the lubricating oil cannot pass through the blocking of the sealing ring 22, thereby playing a sealing role. The sealing ring 22 is made of rubber.

As shown in Figures 1 to 3, preferably, a pressure relief groove 22 is provided on the outer peripheral wall of the first connecting portion 21, the sealing ring 21 is located in the pressure relief groove 22, and the pressure relief groove 22 It is used to fix the sealing ring 21 so that the sealing ring 21 has a good sealing effect. In one embodiment, there is a pressure relief space 222 between the sealing ring 21 and the front side 221 of the pressure relief groove 22 , and the sealing ring 21 abuts against the rear side 222 of the pressure relief groove 22 . When the lubricating oil in the gearbox is under pressure, dynamic leakage occurs, and the leaking lubricating oil 11 enters the pressure relief groove 22, and is blocked by the sealing ring 21 in the pressure relief groove 22. Due to the setting of the pressure relief space 222, the lubrication The oil cannot generate continuous high pressure, and thus enters the pressure relief groove 22, and the lubricating oil cannot pass through the blocking of the sealing ring 21, so as to play a sealing role and reduce the risk of lubricating oil leakage.

To sum up, the utility model effectively overcomes various shortcomings in the prior art and has high industrial application value.

The above-mentioned embodiments only illustrate the principles and effects of the present utility model, but are not intended to limit the present utility model. Anyone familiar with this technology can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed in the utility model should still be covered by the claims of the utility model.

Claims (6)

1. A sealing structure of a positioning pin in a spline sleeve assembly of an automobile transmission system, the spline sleeve assembly includes a spline sleeve (1) and a positioning pin (2), and the spline sleeve (1) is provided with an internal spline (10), lubricating oil (11) is coated between the inner spline (10) and the spline sleeve (1), and the positioning pin (2) includes a The first connecting part (20), the first connecting part (20) is connected to the end of the inner spline (10), is characterized in that it includes an outer peripheral wall provided on the first connecting part (20) The sealing ring (21) on the top, the first connecting part (20) is sealingly engaged with the inner wall of the spline sleeve (1) through the sealing ring (21). 2. The sealing structure of the positioning pin in the spline sleeve assembly of the automobile transmission system according to claim 1, characterized in that: a pressure relief groove (22) is provided on the outer peripheral wall of the first connecting part (20), The sealing ring (21) is located in the pressure relief groove (22). 3. The sealing structure of the positioning pin in the spline sleeve assembly of the automobile transmission system according to claim 2, characterized in that: the sealing ring (21) and the front side (221) of the pressure relief groove (22) There is a pressure relief space (222) between them, and the sealing ring (21) is against the rear side (223) of the pressure relief groove (22). 4. The sealing structure of the positioning pin in the spline sleeve assembly of the automobile transmission system according to claim 1, characterized in that: the sealing ring (21) is made of rubber. 5. The sealing structure of the positioning pin in the spline sleeve assembly of the automobile transmission system according to claim 1, characterized in that: the positioning pin (2) is connected to the spline sleeve (1) by riveting. 6. The sealing structure of the positioning pin in the spline sleeve assembly of the automobile transmission system according to claim 1, characterized in that: the positioning pin (2) includes a second connecting portion ( 23), the second connecting portion (23) is covered with a positioning sleeve (24).