KR20030017173A - Slip joint of universal joint - Google Patents

Abstract

PURPOSE: A slip joint is provided to transmit rotating force and to generate elastic force simultaneously by closely installing between a pipe and a shaft. CONSTITUTION: A pipe groove(31) is formed inside a pipe(30). A shaft groove(41) is formed outside a shaft(40) corresponding to the pipe groove. An elastic member(50) generates elastic force outward by inserting between the pipe groove and the shaft groove. Thereby, a slip joint is slipped smoothly. Therefore, the noise and the vibration is varied are reduced when the length of the slip joint.

Description

SLIP JOINT OF UNIVERSAL JOINT}

The present invention relates to a slip joint of a universal joint, and more particularly, a friction generated during slip as a simple structure by improving the connection structure of a pipe and a shaft in a slip joint formed by dividing into a hollow pipe and a shaft inserted into the hollow joint. It relates to a slip joint of a universal joint to reduce the play in the direction of rotation and rotation.

In general, the universal joint is installed to be inclined at an arbitrary angle, and is provided to transmit rotational force therebetween, and two yoke joints are provided on the side transmitting the rotational force and the receiving side, respectively. It is provided with a slip joint, which is connected between the yoke joints and is divided into a pipe and a shaft so as to transmit rotational force and slip in the axial direction.

1 and 2 is a view showing such a conventional universal joint. As shown in the drawing, the yoke joints 1 installed at both ends of the universal joint are disposed so as to occlude two yokes provided so that the pins can be radially installed inside the one end thereof, and a cross shape is formed therebetween. The spider 2 is provided so that the rotational force can be transmitted from the yoke of one side to the yoke of the other side even when the spider 2 is refracted at a predetermined angle or less.

In addition, the slip joint 3 provided between the yoke joint 1 transmits the rotational force transmitted from the yoke joint 1 on one side to the yoke joint 1 on the other side, and at the same time enables slippage in the axial direction. It is divided into a pipe 4 connected to the yoke joint 1 and a shaft 6 connected to the yoke joint 1 on the other side, and a serration 7 is formed between the pipe 4 and the shaft 6. (Or spline) is formed.

That is, by forming a pair of serrations 7 engaged with each other on the inside of the pipe 4 and on the outside of the shaft 6, the movement is free in the axial direction and the slip is possible, and the rotational force is fixed in the rotation direction. Will be delivered.

On the other hand, the open end of the pipe 4 is provided with a cutout portion 5 formed with a predetermined value cut in the axial direction, and the dust cap 8 which prevents foreign matter from entering the inside of the cutout 5. ) Is installed.

In addition, the outer peripheral side of the cutout portion 5 contracts the pipe 4 toward the center side and comes into close contact with the shaft 6 installed therein, thereby preventing the pipe 4 and the shaft 6 from loosening and at the same time. (4) and a clip 9 for limiting the axial movement of the shaft 6 are provided.

That is, the clip 9 is a steel ring rolled up so that both ends overlap, and is installed outside the cutout 5 in a state where both ends are extended to be provided so as to generate an elastic force toward the center thereof.

This minimizes the rotational play between the pipe 4 and the shaft 6 due to the installation of the clip 9, the pipe 4 and the shaft 6 are tightly fixed to each other in the axial direction, and a suitable load is applied to the pipe. The length of the slip joint 3 is variable when the shaft 4 is transmitted in the axial direction of the shaft 6.

At this time, in order to adjust the length of the slip joint (3), the load applied in the axial direction of the pipe (4) and the shaft (6) generally needs about 8 ~ 15kgf, which is difficult to be generated by human hands Load.

However, the slip joint of the conventional universal joint configured as described above has a problem in that slip between them is not smooth due to fixing the pipe and the shaft as a clip, and noise and vibration are generated due to the close contact when the slip joint is variable in length. There was this.

In addition, since the serration must be molded by precision processing therein so as to prevent the rotation of the pipe and the shaft, the manufacturing process becomes difficult and the manufacturing cost increases.

The present invention is to solve such a conventional problem, the object of the present invention is to provide a rotational force is installed in close contact between the pipe and the shaft to reduce the axial play and axial friction between the pipe and the shaft in a simple structure At the same time to provide a slip joint of the universal joint having an elastic member for generating an elastic force in the radial direction.

1 is a side view showing a conventional universal joint.

FIG. 2 is a cross-sectional view illustrating line A-A of FIG. 1.

Figure 3 is a side view showing a universal joint according to the present invention.

4 is a cross-sectional view illustrating line B-B of FIG. 3.

5 is an exploded perspective view showing a universal joint according to the present invention.

6 is a cross-sectional view showing another embodiment according to the present invention.

<Explanation of symbols for main parts of drawing>

10: York joint 20: Slip joint

30: Pipe 31: Pipe groove

32: coupling groove 40: shaft

41: shaft groove 42: engaging projection

50: elastic member 60: fixing pin

In order to achieve the above object, the slip joint of the universal joint of the present invention is installed between the yoke joints provided at both sides to be inserted into the hollow pipe and its interior so as to be able to slip in the axial direction while transmitting rotational force. A slip joint of a universal joint having a shaft, the pipe joint having an axially elongated interior in the pipe, a shaft groove elongated in the axial direction outside the shaft to correspond to the pipe groove, and the pipe It is characterized in that the elastic member is provided between the groove and the shaft groove to generate an elastic force to the outside.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment according to the present invention.

As shown in FIG. 3, the universal joint includes a slip joint 20 provided in an overall long shape so as to transmit rotational force from one end to the other end, and a yoke joint 10 installed at both ends of the slip joint 20. Separated by.

First, the yoke joint 10 arranges two yokes provided so that the pins can be installed in a radial direction inside one end thereof, and installs a cross spider 11 therebetween to a predetermined angle or less. Even in the refracted state is provided to transmit the rotational force from the yoke of one side to the yoke of the other side.

Next, the slip joint 20 installed between the yoke joints 10 transmits the rotational force transmitted from the yoke joint 10 on one side to the yoke joint 10 on the other side and simultaneously slips in the axial direction. The pipe 30 is connected to the yoke joint 10 and is divided into a shaft 40 connected to the yoke joint 10 on the other side.

On the other hand, the present invention is installed in close contact between the pipe 30 and the shaft 40 to reduce the axial play and axial friction in a simple structure to transmit the rotational force and generate an elastic force in the radial direction at the same time An elastic member 50 and a structure in which the elastic member 50 is installed are provided.

As shown in Figure 4 and 5, the elastic member 50 is a spring pin which is provided in the shape of a hollow tube in which one side is cut by rolling or injecting a plate of metal and plastic and nylon so as to be extended to the outside ( Spring Pin), which is installed in a contracted state to the center side so that the distance between the two ends spaced apart from one side of the outer surface is narrowed, and generates an elastic force to the outside after installation.

That is, the elastic member 50 is contracted and installed between the inner surface of the pipe 30 and the outer surface of the shaft 40, and generates an elastic force radially outward to the inner surface of the pipe 30 disposed outside thereof In close contact with the outer surface of the shaft 40 to transmit the rotational force therebetween.

On the other hand, the inner surface of the pipe 30 and the outer surface of the shaft 40 so that the elastic member 50 can be installed is provided with a pair of semi-circular grooves to form a circular groove facing each other.

That is, the pipe groove 31 is formed on the inner surface of the pipe 30 is recessed to the outer peripheral side, the shaft groove 41 corresponding to the pipe groove 31 is formed recessed to the center side on the outer surface of the shaft 40 Is formed, the diameter of the pipe groove 31 and the shaft groove 41 is provided to be in close contact with the outer diameter of the elastic member 50 when the outer diameter of the elastic member 50 is shrunk and assembled.

At this time, a plurality of elastic members 50 are installed between the pipe 30 and the shaft 40, and the pipe groove 31 and the shaft groove 41 are provided in the corresponding number, in this embodiment, Three elastic members 50 and corresponding pipe grooves 31 and shaft grooves 41 are provided in an symmetrical position, for example.

In addition, the coupling protrusion 42 is formed to protrude to the outside between the shaft groove 41 formed on the outside of the shaft 40 for the transmission of a more robust rotational force, the coupling protrusion 42 inside the pipe 30 Coupling groove 32 is provided so that it can be inserted.

That is, three shaft grooves 41 and coupling protrusions 42 are provided at equal angles on the outside of the shaft 40, and the pipe grooves 31 and the coupling grooves 32 are formed to correspond to the inside of the pipe 30. In this case, the pipe groove 31 and the coupling groove 32 is the same in shape, and the coupling protrusion 42 is elastically coupled with the coupling protrusion 42 due to protruding in a shape substantially similar to the elastic member 50. The member 50 is selectively inserted into the pipe groove 31 and the coupling groove 32.

5 is a view showing another embodiment according to the present invention, the pipe 30 and the shaft 40 and the elastic member 50 and the pipe groove 31 and the shaft groove 41 in which the elastic member 50 is installed ) Is the same as the embodiment, and the same name and the same reference numerals will be described. As shown in this, the elastic member 50 is provided with a spring pin to adjust the thickness so that the amount of shrinkage is appropriate, the pipe groove 31 and the shaft groove 41 to adjust the diameter inside the pipe ( 30) and the shaft 40 to set the friction in the proper rotational direction and the axial direction.

In particular, in the present embodiment, by using the fixing pin 60, which is precisely processed in part of the three installation positions of the elastic member 50 in parallel to make it easier to control the elastic member 50, the elastic member 50 ) And to facilitate the assembly of the slip joint (20).

At this time, the elastic member 50 and the fixing pin 60 is provided in the shape of a hollow tube in which one side is cut by rolling or injecting a plate shape made of metal and plastic and nylon.

The slip joint of the universal joint of the present invention configured as described above inserts the coupling protrusion 42 of the shaft 40 into the coupling groove 32 formed inside the pipe 30 in the axial direction so that the pipe 30 and the shaft ( 40) is fixed in the rotation direction.

At this time, since the coupling protrusion 42 can be selectively installed in the coupling groove 32 and the pipe groove 31, the coupling groove 32 to the pipe groove 31 in which the coupling protrusion 42 is not inserted is the shaft 40. Facing the shaft groove 41 provided in the) to form a space in which the elastic member 50 can be inserted.

In addition, the coupling member 32 is provided to face each other in a state in which the pipe 30 and the shaft 40 are temporarily fixed in the rotation direction to the inside of the shaft groove 41 facing the pipe groove 31 and the elastic member ( 50) is retracted in the radial direction and inserted.

As a result, the elastic member 50 generates elastic force to the outside to be in close contact with the pipe 30 and the shaft 40 and at the same time to fix them in the rotation direction and the axial direction, and further installed to compensate for the clearance therebetween. will be.

That is, the rotational force input from one side by the expansion force of the elastic member 50 is transmitted to the other side via the elastic member 50, the expansion force of the elastic member 50 is slip joint 20 when the axial load is applied It acts as a vertical force that causes frictional force.

As described in detail above, the slip joint of the universal joint according to the present invention is provided with an elastic member and a pin that partially connects them between the pipe and the shaft to facilitate slip slip of the slip joint, and thus, when the length of the slip joint is variable. There is an advantage that can reduce the noise and vibration.

In addition, the structure that transmits the rotational force between the pipe and the shaft is simplified, making it easy to manufacture or assemble it, reducing the rotational play and axial friction, reducing the manufacturing cost and improve the reliability of the product There is an advantage to this.

Claims (6)

In the slip joint of the universal joint having a hollow pipe and a shaft inserted therein, which is installed between the yoke joints provided at both sides to transmit the rotational force and to be able to slip in the axial direction, Inside the pipe 30, the pipe groove 31 is formed long in the axial direction, and the shaft groove 41 is formed long in the axial direction on the outside of the shaft 40 to correspond to the pipe groove 31 and The slip joint of the universal joint, characterized in that the elastic member 50 is inserted between the pipe groove 31 and the shaft groove 41 to generate an elastic force to the outside. The method of claim 1, The elastic member 50 is a slip joint of the universal joint, characterized in that the spring pin is formed as a hollow tube cut in one radial direction. The method of claim 1, Three pipe grooves 31 and the shaft grooves 41 are disposed at equal angles at positions symmetric to each other, and the fixing pins are precisely processed with the elastic member 50 inside the pipe grooves 31 and the shaft grooves 41. Slip joint of the universal joint, characterized in that (60) is installed in parallel. The method of claim 1, The outer side of the shaft 40 is provided with a coupling protrusion 42 is formed to protrude, the pipe 30 is characterized in that the coupling groove 32 is provided so that the coupling protrusion 42 can be inserted Joint. The method of claim 4, wherein The coupling groove 32 is provided in the same manner as the pipe groove 31 universal joint, characterized in that the elastic member 50 and the coupling protrusion 42 is selectively inserted. The method of claim 3, wherein The elastic member 50 and the fixing pin 60 is a slip joint of the universal joint, characterized in that provided with a metal material and plastic and nylon material.