KR20030039742A - Slip joint of universal joint - Google Patents

Abstract

PURPOSE: A slip joint of a universal joint is provided to reduce clearance of rotational direction and reduce axial friction, between a pipe and a shaft by installing an elastic member and a reinforcing member. CONSTITUTION: A slip joint of a universal joint has a pipe(30) with a pipe groove(31) formed inside in the axial direction; a shaft(40) with a shaft groove(41) corresponding to the pipe groove; and elastic members(50) inserted between the pipe groove and the shaft groove. One side of the outer periphery of the elastic member is incised in the axial direction, to produce elastic force to the outside. The slip joint of the universal joint has reinforcing members(60) having self-elastic force, to complement rigidity of the elastic member. Thus, slip of the slip joint is smoothly performed, and noise and vibration are reduced.

Description

SLIP JOINT OF UNIVERSAL JOINT}

The present invention relates to a slip joint of a universal joint. More particularly, the present invention relates to a slip joint of a universal joint, and more particularly, an elastic member is disposed therebetween so as to reduce rotational play and axial friction between the pipe and the shaft in a simple and robust manner. It relates to a slip joint of a universal joint for installing a reinforcing member in the.

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 is fixed in the rotational direction. It will transmit the torque.

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 the fixing of the pipe and the shaft as a clip, and noise and vibration are generated due to the high adhesion when the length of the slip joint is variable. 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, an object of the present invention is to provide a resilient member that is installed in close contact therebetween so as to reduce rotational play and axial friction between the pipe and the shaft simply and firmly. It is to provide a slip joint of the universal joint having a reinforcing member for reinforcing.

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.

<Explanation of symbols for main parts of drawing>

10: York joint 20: Slip joint

30: Pipe 31: Pipe groove

32: coupling groove 33: dust cap

40: shaft 41: shaft groove

42: engaging protrusion 50: elastic member

60: reinforcing member

In order to achieve the above object, the slip joint of the universal joint of the present invention is a pipe with a pipe groove formed in the axial direction in the hollow provided inside, the shaft is inserted into the inside of the pipe to the outside to correspond to the pipe groove A slip joint of a universal joint having a shaft having a groove and an elastic member inserted between the pipe groove and the shaft groove so as to generate an elastic force to the outside so that an outer circumferential side is cut in the axial direction. It is characterized in that the reinforcing member having its own elastic force is inserted into the installation to complement the.

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 is divided into a slip joint 20 and a yoke joint 10 installed at both ends thereof so as to transmit rotational force from one end to the other end.

First, the yoke joint 10 arranges the two yokes to interlock with each other, and installs a cross spider 11 therebetween to transmit rotational force even in a state where the yoke joint is refracted to a predetermined angle or less.

Next, the slip joint 20 installed between the yoke joint 10 is divided into a hollow pipe 30 and a shaft 40 inserted into the hollow pipe 30 so as to be able to slip in the axial direction while transmitting rotational force. do.

At this time, dust and foreign substances are prevented from being inserted at the tip of the pipe, and an inner side thereof is provided with a dust cap 33 having an opening formed to correspond to the outer surface of the shaft.

On the other hand, in the present invention, the elastic member 50 is provided between the pipe 30 and the shaft 40 so as to reduce the rotational play and axial friction between the pipe 30 and the shaft 40, the elastic member 50 of the A reinforcing member 60 is installed inside the pipe 30 and the shaft 40 so as to supplement the rigidity, and an installation structure of the elastic member 50 in which the reinforcing member 60 is installed is provided in the pipe 30 and the shaft 40.

As shown in Figure 4 and 5, the elastic member 50 is a spring pin (rolling pin) is provided in the shape of a hollow tube in which one side is cut by rolling a plate of metal material so as to extend to the outside side, one side outside It is installed in a contracted state to the center side so that the space between the two ends formed spaced to be narrowed, and after installation to generate an elastic force to the outside.

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 at symmetric positions.

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. Is provided.

At this time, the pipe groove 31 and the coupling groove 32 is the same in shape, the coupling protrusion 42 is projected in a shape substantially similar to the elastic member 50, the coupling protrusion 42 and the elastic member 50. Is selectively inserted into the pipe groove 31 and the coupling groove (32).

In addition, in the present invention, the elastic member 50 inserted into the pipe groove 31 and the shaft groove 41 provided to correspond to each other is deformed therein when the rotational force is transmitted, so that the elastic force is lowered, and the pipe groove 31 and The contact ratio with the shaft groove 41 is lowered, and the reinforcing member 60 is further provided to prevent the load distribution from being uneven.

That is, the reinforcing member 60 is a circular rod having a shape corresponding to the inner surface thereof so that the reinforcing member 60 may be inserted into the elastic member 50 provided in the hollow, and prevents the elastic member 50 from contracting toward the center thereof. At the same time as the reinforcement is provided with an elastic body that can improve the restoring force of the elastic member 50 by its own elastic force.

In particular, since the reinforcing member 60 is installed to be filled in the elastic member 50, the cutting force is applied to the outer peripheral side of the elastic member 50 in a state where the gap between the pipe 30 and the shaft 40 is located. It is possible to prevent both ends of the elastic member 50 from being deformed by this rotational force when transmitting.

At this time, the reinforcing member 60 is a rubber spring provided with a rubber material having a good elastic force, is inserted into the elastic member 50 in a compressed state to generate an elastic force to the outside, thereby the elastic member 50 is Since the deformation space to the inner side is removed, the rigidity against deformation is improved and the restoring force is improved.

In addition, since the elastic member 50 is more tightly adhered to the pipe groove 31 and the shaft groove 41 due to the reinforcing member 60, and the contact ratio thereof is improved, the shaft in the pipe 30 through the elastic member 50 is improved. The rotational force transmission from the 40 or the shaft 40 to the pipe 30 is facilitated.

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 in 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.

Then, after the reinforcing member 60 is pressed into the elastic member 50, the coupling groove 32 is provided to face each other in a state where the pipe 30 and the shaft 40 are temporarily fixed in the rotational direction. The elastic member 50 in which the reinforcing member 60 is installed is inserted into the shaft groove 41 facing the pipe groove 31 in a radial direction.

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 and the reinforcing member 60 is transmitted to the other side via the elastic member 50 in which the reinforcing member 60 is installed, and the axial load may act. When the expansion force of the elastic member 50 and the reinforcing member 60 is to act as a vertical drag which causes the frictional force of the slip joint (20).

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 reinforcing member partially connecting them between the pipe and the shaft to facilitate slip slip of the slip joint, thereby varying the length of the slip joint. There is an advantage that can reduce noise and vibration in the city.

In addition, since the deformation space inside the elastic member is removed by the reinforcing member, the rigidity of the elastic member is reinforced, thereby preventing deformation of the elastic member and improving the contact ratio between the pipe groove and the shaft groove, and uniformly distribute the load. There is an advantage of tighter between the shafts.

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 (4)

A pipe 30 having a pipe groove 31 formed in the axial direction in the hollow provided in the hollow, and the shaft groove 41 is formed to be inserted into the inside of the pipe 30 to correspond to the pipe groove 31 on the outside. Slip of the universal joint having a shaft 40, the elastic member 50 is inserted between the pipe groove 31 and the shaft groove 41, the outer peripheral side is cut in the axial direction so as to generate an elastic force to the outside In the joint, Slip joint of the universal joint, characterized in that the reinforcing member 60 has its own elastic force is inserted into the elastic member 50 so as to complement the rigidity. The method of claim 1, The pipe joint 31 and the shaft groove 41 is a slip joint of the universal joint, characterized in that three are arranged at a position symmetrical with each other. The method of claim 2, 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 3, 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 reinforcing member 60 and the coupling protrusion 42 is selectively inserted.