KR20130116761A

KR20130116761A - Tripod type constant velocity joint

Info

Publication number: KR20130116761A
Application number: KR1020120039432A
Authority: KR
Inventors: 김성현
Original assignee: 현대위아 주식회사
Priority date: 2012-04-16
Filing date: 2012-04-16
Publication date: 2013-10-24

Abstract

The present invention relates to a tripod type constant velocity joint capable of suppressing the occurrence of vibration by reducing the axial force by reducing the contact area between the roller and the housing,
Three track grooves are formed therein to transmit the rotational power of the engine, and in the track grooves, a plurality of protrusion lines are formed on the left and right sides in parallel with the axial direction of the shaft, and the housing rotates. A shaft which is rotated by receiving power, is connected to one end of the shaft to be connected to the housing and the shaft, is installed inside the housing, and a tripod trunnion is formed, and the trunnion of the spider An inner roller installed on an outer circumferential surface, an outer roller installed on an outer circumferential surface of the inner roller to reduce friction with the housing, a strike out provided on an upper end of the needle roller and the outer roller, and the strike out It includes a retaining ring to prevent the departure of.

Description

Tripod type constant velocity joint

The present invention relates to a tripod type constant velocity joint, and more particularly, to a tripod type constant velocity joint capable of suppressing vibration by reducing the axial force by reducing the contact area between the roller and the housing.

Generally, a joint is for transmitting rotational power (torque) to a rotation shaft having different angles of rotation axis. In the case of a propulsion shaft having a small power transmission angle, a hook joint, a flexible joint, or the like is used. A constant velocity joint is used.

The constant velocity joint is mainly used for the axle shaft of an independent suspension type front wheel drive vehicle because it can smoothly transmit power at constant speed even when the driving shaft and the driven shaft have a large crossing angle, and the engine side is a tripod type joint around the shaft. The tire side around the shaft is made of a burfield type joint.

1 is a cross-sectional configuration diagram of a general constant velocity joint. As shown in FIG. 1, a general constant velocity joint configuration includes a tripod-type joint on the right side (engine side) around the shaft 1, and a left (wheel side) centering around the shaft 1. It consists of a type joint.

The structure of the tripod joint, which is installed on the right side (engine side) around the shaft 1, transmits the rotational power of the engine (not shown) and has three track grooves formed therein. And a shaft 1 which is rotated by receiving the rotational power of the housing 2, and is connected to one end of the shaft 1 to connect the housing 2 and the shaft 1 to the housing 2. A spider 3 which is installed in the inner side of which the tripod-type trunnion is formed, the needle roller 6 which is installed on the outer circumferential surface of the trunnion of the spider 3, and the outer circumferential surface of the needle roller 6. An inner roller 5 to be installed, an outer roller 4 installed on an outer circumferential surface of the inner roller 5 to reduce friction between the housing 2 and the shaft 1, the needle roller 6 and the inner The strike out 7 provided in the upper end of the roller 5, and the said strike lower Retaining ring (8) for preventing the separation of the track 7, the boot 10 is connected to one end of the shaft (1) and one end is connected to the housing (2), and the boot (10) It comprises a clamping band (11, 12) for fixing.

The structure of the ball type joint provided on the left side (tire side) with respect to the shaft 1 includes a shaft 1 rotated by receiving the rotational power of the tripod type joint, An outer race 13 installed on the outer side of the inner race 15 and an outer race 13 connected to the outer race 13 for transmitting the rotational power of the inner race 15 to the outer race 13. [ A cage 14 for supporting the ball 16; a sensor ring 17 provided on the outside of the outer race 13; A boot 18 connected at one end to the outer race 13 and clamping bands 19 and 20 for fixing the boot 18.

The operation of a constant velocity joint according to the above construction is as follows.

When the rotational power output from the engine (not shown) is transmitted to the housing 2 via a transmission (not shown), the housing 2 is rotated, and the rotational power of the housing 2 is transmitted to the outer roller 4, And is transmitted to the spider 3 via the inner roller 5 and the needle roller 6 to rotate the shaft 1 connected to the spider 3. The rotation power of the shaft 1 is transmitted to the outer race 13 via the inner race 15 and the ball 16 to thereby rotate a wheel (not shown) connected to the outer race 13.

In this case, in the tripod type joint provided on the right side (engine side) about the shaft 1, the outer roller 4 is associated with the outer roller 4 by slidingly moving in the track groove of the housing 2. As the rotation angle of the shaft 1 is changed, the angle of the car 1 is articulated in accordance with the displacement of the vehicle. The rotation angle of 13) is changed, so that the angle of the car is deformed according to the displacement of the vehicle.

On the other hand, the boot 10 on the side of the tripod type joint and the boot 18 on the side of the ball type joint enclose the outside of the tripod type joint and the ball type joint respectively so that the tripod- To prevent damage.

At the same time, when the torque outputted from the engine transmits torque to the wheel side through the shaft 1 through the transmission, unbalanced rotation occurs at any rotational speed in the shaft 1 rotating at a high speed. Causing undesirable vibrations and adversely affecting the operation of the drive system. In order to suppress the undesirable vibration due to such an unbalanced rotation, the damper 21 provided at the middle portion of the shaft 1 is designed to prevent the undesirable vibration from occurring due to the harmful vibration frequency occurring in the shaft 1 during the high- booming noise.

However, in the conventional tripod type constant velocity joint, the axial force is generated three times by the roller of the same shape as the spider 3 rotates once as one turn rotates. Axial force has a problem that periodically causes vibration in the vehicle. The above axial force is related to the frictional force between the roller and the housing 3 and is disadvantageous as the area where the roller and the housing 2 come in contact is wider.

SUMMARY OF THE INVENTION An object of the present invention is to provide a tripod type constant velocity joint capable of suppressing the occurrence of vibration by reducing the axial force by reducing the contact area between the roller and the housing as described above.

As a means for achieving the above object, the configuration of the present invention transmits the rotational power of the engine and has three track grooves formed therein, and the track grooves have left and right protrusion line portions parallel to the shaft direction. A plurality of housings each formed in the housing, a shaft rotated by receiving the rotational power of the housing, and connected to one end of the shaft to be connected to the housing and the shaft and installed inside the housing, and a tripod type trunnion. A spider having a needle formed therein, an inner roller provided on an outer circumferential surface of the trunnion of the spider, an outer roller provided on an outer circumferential surface of the inner roller, and reducing the friction between the housing, and the inner roller and the outer roller. Strike out installed at the top and to prevent the above-mentioned strike out Preferably comprising including a retainer ring.

The structure of this invention is preferable when two said protrusion line parts are formed.

The structure of this invention is preferable when said inner roller consists of a needle roller.

The structure of this invention is preferable when said outer roller consists of spherical rollers.

The configuration of the present invention is preferred in that the contact portion with the outer roller of the protrusion line portion is formed in a curved shape.

This invention has the effect of suppressing the generation of vibration by reducing the contact area between the roller and the housing and reducing the axial force.

1 is a cross-sectional view of a general constant velocity joint.
2 is a sectional view taken along the line AA in Fig.
3 is an external configuration view of a general constant velocity joint.
Figure 4 is a block diagram of a tripod type constant velocity joint according to an embodiment of the present invention.
5 is a cross-sectional configuration of main parts of a tripod type constant velocity joint according to an exemplary embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, so that those skilled in the art can easily carry out the present invention. Other objects, features, and operational advantages, including the purpose, operation, and effect of the present invention will become more apparent from the description of the preferred embodiments.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory only and are not to be construed as limiting the scope of the invention as disclosed in the accompanying claims. It is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and similarities, many of which are within the scope of the present invention. In addition, the terms or words used in the specification and claims herein should not be construed as being limited to the ordinary or dictionary meanings, and the inventors should properly explain the concept of terms in order to best explain their invention in the best way. Based on the principle that can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention.

4 is a configuration diagram of a tripod-type constant velocity joint according to an embodiment of the present invention, and FIG. 5 is a cross-sectional view illustrating a main part of the tripod type constant velocity joint according to an embodiment of the present invention.

As shown in Figure 4 and 5, the configuration of the tripod-type constant velocity joint according to an embodiment of the present invention, and transmits the rotational power of the engine (not shown) and three track grooves are formed therein In the track groove, a housing 32 having two projection line portions 32a and 32b formed on the left side and the right side, respectively, in parallel with the axial direction of the shaft 31, and the rotational power of the housing 32. It is connected to one end of the shaft 31 in order to connect the shaft 31 and the housing 32 and the shaft 31 is rotated by receiving the installation is installed inside the housing 32 and tripod type trunnion A spider 33 having a needle formed therein, an inner roller 36 provided on an outer circumferential surface of the trunnion of the spider 33, and an outer circumferential surface of the inner roller 36, and friction with the housing 32; Outer roller 35 for reducing the, and Too comprises a roller 36 and the outer and strike-out bit (37) provided at the top of the rollers 35, the retainer ring 38 to prevent the dissociation of the strike-out bit (37).

The inner roller 36 is made of a needle roller.

The outer roller 35 is made of a spherical roller.

The contact portion of the protruding line portions 32a and 32b with the outer roller 35 has a curved cross section.

The operation of the tripod type constant velocity joint according to one embodiment of the present invention with the above-described structure is as follows.

When the rotational power output from the engine (not shown) is transmitted to the housing 32 via a transmission (not shown), the housing 32 is rotated, the rotational power of the housing 32 is the outer roller 35, It is transmitted to the spider 33 through the inner roller 36 to rotate the shaft 31 connected to the spider 33.

The outer roller 35 is slid according to the displacement of the vehicle by varying the rotation angle of the shaft 31 associated with the outer roller 35 by sliding the track groove of the housing 32. In this case, the outer roller 35 is slidably moved in contact with the two projection line portions 32a and 32b respectively formed on the left and right sides of the track groove of the housing 32 and thus the housing 32 and the housing 32. By reducing the contact area of the axial force is reduced to suppress the generation of vibration.

31 shaft 32 housing
33: spider 35: outer roller
36: inner roller 37: strike out
38: Retaining Ring

Claims

Three tracks are formed therein to transmit the rotational power of the engine, and the tracks include a housing in which a plurality of protrusion lines are formed on the left and right sides in parallel with the axial direction of the shaft,
A shaft rotatably receiving the rotational power of the housing,
A spider connected to one end of the shaft for connecting the housing and the shaft, the spider being installed inside the housing and having a trunnion type trunnion;
An inner roller installed on an outer circumferential surface of the trunnion of the spider,
An outer roller installed on an outer circumferential surface of the inner roller to reduce friction with the housing;
A strike out installed at an upper end of the inner roller and the outer roller;
Tripod type constant velocity joint comprising a retaining ring for preventing the strike out of the strike.

The method of claim 1,
Tripod-type constant velocity joint, characterized in that two projection line portion is formed.

The method of claim 1,
The inner roller is a tripod type constant velocity joint, characterized in that consisting of a needle roller.

The method of claim 1,
The outer roller is a tripod type constant velocity joint, characterized in that consisting of a spherical roller.

The method of claim 1,
Tripod-type constant velocity joint, characterized in that the contact portion with the outer roller of the protrusion line portion is formed in a curved cross section.