KR200256417Y1 - Tripford type constant velocity joint - Google Patents

Abstract

The present invention relates to a Tripod constant velocity joint, a housing (10) having three track grooves (11) having a guide surface (12) in an inner surface thereof, and a track groove (of the housing 10). 11, a spider assembly 20 having three triions 21 inserted therein, and a pinion 21 of the spider assembly 20 that is pivoted and axles in the track groove 11 of the housing 10, respectively. The outer roller 31 and the outer roller 31 and the outer roller 31 and the needle, which are located in the track groove 11 so as to enable the directional movement and are in contact with the guide surface 12 in the rolling contact, the triion 21 In the tripod constant velocity joint including a spherical roller 32 which absorbs the careful movement of the spider assembly 20 between these rollers 33, a groove 321 is formed on the outer periphery of the spherical roller 32. And inserting a plurality of balls 321 into the rolling motion of the ball 34 during the careful movement of the spider assembly 20. Due to the friction coefficient is reduced by the axial force to reduce the vibration of the vehicle, it is a Tripod constant velocity joint that can improve the durability.

Description

Tripod type constant velocity joint

The present invention relates to a tripod constant velocity joint, and more particularly, to form a groove for inserting a plurality of balls on the outer periphery of the spherical roller fitted to the outer roller, the ball assembly is inserted into the spider assembly The tripod constant velocity joint is designed to reduce the vibration of the vehicle by reducing the axial force by reducing the friction coefficient due to the rolling motion of the ball.

In a conventional tripod constant velocity joint, a spider assembly having three track grooves having an axially guiding surface therein, a spider assembly having three triions inserted into the track grooves of the housing, and a triion of the spider assembly are provided. It consists of a cylindrical roller assembly which is fitted in rolling contact with the guide surface of the track groove so as to enable pivoting and axial movement in the track groove of the housing, respectively.

The cylindrical roller includes an outer roller in contact with the guide surface of the track groove, a plurality of needle rollers positioned in the trion, and a spherical roller for absorbing the careful movement of the spider assembly between the outer roller and the needle roller. In order to couple the outer roller and the inner roller, the assembly groove is installed symmetrically to the outer roller.

In this conventional tripod constant velocity joint, the housing is rotated by the rotation of the spider assembly, wherein the joint angle of the triion with respect to the center of focus of the housing is changed. Accordingly, the cylindrical roller assembly rolls and slides on the guide surface of the track groove according to the change of the joint angle to compensate for the change amount.

However, the conventional tripod constant velocity joint has a significant reduction in axial force at low joint angles, but a decrease in axial force reduction occurs at a certain joint angle above a certain joint angle, resulting in a weak performance improvement effect at large joint angles. There is a problem that makes you feel.

In addition, the rigidity of the notch is reduced by the assembling grooves installed on the outer roller, cracks are generated from the assembling grooves, and the fabrication of the assembling grooves (addition of cold forging and additional end reel work) It is difficult, difficult, and impairs durability.

The present invention was devised to solve such a problem, and formed a ball insertion groove for inserting a plurality of balls on the outer periphery in the spherical roller fitted to the outer roller, and inserts the ball here to be careful of the spider assembly Its purpose is to provide a tripod type constant velocity joint that can reduce the axial force by reducing the friction coefficient due to the rolling motion of the ball to reduce the vibration of the vehicle and improve the durability at the same time.

To achieve the object of the present invention, a spider assembly having three track grooves having an axially guiding surface therein, a spider assembly having three triions inserted into the track grooves of the housing, and a triion of the spider assembly. Careful attention is paid to the spider assembly between the outer roller and the needle and the outer roller, which is positioned in the track groove so as to enable pivoting and axial movement in the track groove of the housing, respectively, in rolling contact with the guide surface In a tripod constant velocity joint including a spherical roller for absorbing motion, a tripod constant velocity joint is formed by forming a groove in the outer circumference of the spherical roller and inserting a plurality of balls therein. Is possible by.

Hereinafter, each embodiment will be described in detail with reference to the accompanying drawings.

The present invention is provided with three track grooves (11) having guide surfaces (12) in the axial direction on the inner surface of the tripod housing (10), and three triion (21) inserted into the track grooves (11). And having a spider assembly 20, which is fitted into the triion 21 of the spider assembly 20 and rolls on the guide surface 12 to allow pivoting and axial movement in the track grooves 11 of the housing 10, respectively. The cylindrical roller assembly 30 in contact is coupled.

In this way, the cylindrical roller assembly 30 coupled to each track groove 11 has an outer roller 31 in contact with the clouds in the track groove 11 and a plurality of needle rollers 33 positioned in the triion 21. ), And a spherical roller 32 for absorbing the careful movement of the spider assembly 20 between the outer roller 31 and the needle roller 33, the needle roller 33 and the spherical roller 32 The striker outer 23 and the snap ring 22 are mounted on the shaft of the triion 21 so that) does not depart from the triion 21.

A groove 321 is formed on the outer circumference of the spherical roller 32, and a plurality of balls 321 are inserted therein so that the ball 34 has a rolling motion on the inner surface of the outer roller 31. It better absorbs the careful movement of the assembly 20.

The groove 321 formed at the outer edge of the spherical roller 32 has a ball 34 formed at six equal positions in the circumferential direction of the outer circumferential edge of the spherical roller 32 as shown in FIGS. 1 to 3. And a plurality of balls 34 are formed by forming one or two rows of grooves 321 in the circumferential direction in the middle of the outer circumferential edge of the spherical roller 32 as shown in FIGS. 4 to 6. The axial force component can be reduced by arranging in the circumferential direction so that the ball 34 rolls and reduces the coefficient of friction.

In addition, as shown in FIGS. 7 to 8, the groove 321 is formed in the middle of the inner surface of the outer roller 31, and a plurality of balls 34 are arranged in the circumferential direction. Although arranged in rows, a cylindrical spacer 35 may be provided between the balls 34 arranged up and down.

The tripod type constant velocity joint of the present invention configured as described above has the outer roller 31 turning along the guide surface of the track groove 11, and the needle roller 33 and the spherical roller 32 make a careful movement. The outer roller 31 and the spherical roller 32 are rotated by the rolling motion. As such, the inner surface of the outer roller 31 and the spherical roller 32 are in a sliding motion. In this case, since the friction coefficients are different from each other, when the joint angle is small, the output segment due to the contact angle does not work. In this case, the contact angle becomes large, so that the axial force component increases. At this time, a groove 321 is formed at the outer circumference of the spherical roller 32 that is fitted into the outer roller 31 and contacts the inner surface, and a plurality of balls 34 are inserted therein.

Therefore, in the case of the rotating rolling motion and the careful motion according to the axial change of the spider assembly 20, the friction coefficient is reduced due to the rolling motion of the ball 34, and thus the axial force component can be reduced. That is, due to the rolling motion of the ball 34 absorbs the more careful movement of the spider assembly 20, reduces the rotational resistance when the spider assembly 20 is rotated, and reduces the frictional resistance to the side of the vehicle The riding comfort is improved by reducing the axial force, which is the cause of vibration.

As can be seen from the above description, the present invention inserts a plurality of balls on the outer circumference of the spherical roller in contact with the inner surface of the outer roller, thereby reducing the axial force by reducing the friction coefficient by rolling of the ball during careful movement of the spider assembly. Minimize vibrations and increase durability.

1 is a cross-sectional view of the excerpts showing the configuration of the present invention

2 is a cross sectional view of FIG. 1

3 is a cross-sectional view illustrating a state in which the spherical roller is assembled to the outer roller.

4 is a cross-sectional view showing the configuration of a first embodiment of the present invention

5 is a cross-sectional view of FIG. 4

6 is a cross-sectional view showing the configuration of a second embodiment of the present invention

7 is a cross-sectional view showing the configuration of a third embodiment of the present invention

8 is a perspective view showing a spacer in a third embodiment of the present invention

Explanation of symbols on the main parts of the drawings

10 housing 11 track groove

12: guide surface 20: spider assembly

21: Trinity 22: Snap Ring

30: cylindrical roller assembly 31: outer roller

32: Spherical Roller 33: Needle Roller

34: Ball 321: Home

Claims (1)

A housing 10 having three track grooves 11 having a guide surface 12 with an axial direction on an inner surface thereof, and three triions inserted into the track grooves 11 of the housing 10. A track groove 11 fitted with a spider assembly 20 having a 21 and a trion 21 of the spider assembly 20 to allow pivoting and axial movement in the track groove 11 of the housing 10 respectively. An outer roller 31 positioned in contact with the guide surface 12 and rolling in contact with the guide surface 12, a needle roller 33 positioned on the outer circumferential surface of the trinion 21, and a plurality of consecutively arranged, and the outer roller 31 and the needle In the tripod constant velocity joint comprising a spherical roller 32 which absorbs the careful movement of the spider assembly 20 between these rollers 33, The spherical roller 32 is formed in a cogwheel shape by dividing the groove 321 into six equal parts along the outer circumference of the spherical roller 32. The grooves 321 are formed at six equal positions circumferentially from the center of the spherical roller 32 so that a plurality of balls 34 are arranged in a circumferential direction. .