JP2003156063A - Universal joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a universal joint having elastic means for generating elastic force in the radial direction and transmitting means for transmitting more greater rotating force, thus achieving clearance compensation and reduced vibration between a pipe and a shaft of a slip joint and between the slip joint and a yoke joint and improved rigidity for temperature and rotating force. SOLUTION: The universal joint comprises the slip joint having shaft inserted in a hollow portion of the pipe 30 for transmitting rotating force in a freely slipping manner, the yoke joints 10 provided on both sides of the slip joint and each having a hollow portion prepared at one end for lapping the pipe 30 and the shaft, the elastic means 150 inserted between the pipe 30 and the shaft and between each of both ends of the slip joint and each of the yoke joints 10 for generating elastic force in the radial direction, and transmitting means 160, 170, 180, 190, 200 integrally formed between the pipe 30 and the shaft and between the slip joint and each of the yoke joints 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a universal joint, and more particularly, to clearance compensation and vibration reduction between pipe and shaft of slip joint and between slip joint and yoke joint, and improvement of rigidity against temperature and rotational force. As described above, the present invention relates to a universal joint with improved shaft coupling.

[0002]

2. Description of the Related Art Generally, a universal joint is provided so as to be tilted at an arbitrary angle so that a rotational force can be transmitted therebetween.

For this reason, a yoke joint (Yoke) is provided on each of the side for transmitting the rotational force and the side for receiving the rotational force.
Joint), and a slip joint (Sl) that is connected between the yoke joint and the yoke joint so as to freely slip in the axial direction.
ip Joint).

FIG. 1 is a view showing such a conventional universal joint. As illustrated in this,
The yoke joint 1 has two yokes arranged so that pins can be provided in the radial direction inside one end side so as to interlock with each other.

In the meantime, the cross-shaped spider (Sp
It is prepared so that the rotational force can be transmitted from the yoke on one side to the yoke on the other side even in a state of being bent at a predetermined angle or less.

On the other hand, the slip joint 2 is prepared so that the rotational force transmitted from the yoke joint 1 on one side is transmitted to the yoke joint 1 on the other side, and at the same time, it can be slid in the axial direction.

That is, the pipe 3 connected to the yoke joint 1 on one side and the shaft 4 connected to the yoke joint 1 on the other side are formed separately.

A pair of serrations 3a and 4a meshing with each other are provided inside the pipe 3 and outside the shaft 4.
(Or spline) is formed (see FIG. 2).

A slit 3b formed by cutting a predetermined length in the axial direction is prepared on the open front end side of the pipe 3.

At the same time, at the open end of the pipe 3,
A dust cap 6 is provided to prevent foreign matter from flowing therein.

On the outer peripheral side of the slit 3b, a clip 5 which prevents the pipe 3 and the shaft 4 from loosening and at the same time limits the axial movement of the pipe 3 and the shaft 4.
Is provided.

The pipe 3 and the shaft 4 are closely fixed to each other by the clip 5, and the pipe 3 and the shaft 4 are fixed.
Radial clearance between them is minimized.

At this time, in order to adjust the length of the slip joint 2, it is necessary to adjust the length of the pipe 3 and the shaft 4 by 8 to 8.
It is necessary to apply a load of about 15 kgf (78.4 to 147 N), and this load is difficult to generate with human hands.

On the other hand, a slip joint 2 is inserted inside one side of the yoke joint 1, and a vibration-proof rubber 7 is provided between the slip joint 2 and the yoke joint 1 (see FIG. 3).

That is, between the inside of the yoke joint 1 and the outside of the slip joint 2, a vibration-proof rubber 7 made of a rubber material having a high elastic force is provided to reduce the vibration transmitted therebetween.

Further, holes are formed in the slip joint 2, the yoke joint 1, and the anti-vibration rubber 7 so that they can communicate with each other in the radial direction.

A pin-shaped stopper 8 is inserted and installed in the hole to firmly connect the slip joint 2, the yoke joint 1 and the anti-vibration rubber 7 in the axial and rotational directions.

That is, when a rotation angle is generated beyond the elastic region of the material of the anti-vibration rubber 7, the slip joint 2
The rotational force is transmitted by the strength of the stopper 8 that penetrates the yoke joint 1.

[0019]

However, in the conventional universal joint configured as described above, since the pipe 3 of the slip joint 2 and the shaft 4 are fixed by the clip 5, the slip between them is not smooth. There was a problem.

Further, when the length of the slip joint 2 is changed, there is a problem that noise and vibration are generated due to the extremely close contact.

Further, since the serrations 3a, 4a must be formed on the pipe 3 and the shaft 4 by precision machining, the manufacturing process becomes difficult and the manufacturing cost increases.

At the same time, the anti-vibration rubber 7 provided between the slip joint 2 and the yoke joint 1 is highly susceptible to deterioration and cracking at high and low temperatures, and there is a problem that the change in rigidity due to temperature is significant.

The anti-vibration rubber 7 has a low rigidity for transmitting the rotational force, and there is a problem that a separate stopper 8 must be provided.

The present invention has been made to solve the above-mentioned conventional problems, and its purpose is to provide clearance compensation and vibration reduction between the pipe and the shaft of the slip joint and between the slip joint and the yoke joint. It is an object of the present invention to provide a universal joint including elastic means for generating elastic force in the radial direction and transmission means for transmitting a larger rotational force so that rigidity with respect to temperature and rotational force is improved.

[0025]

A universal joint according to the present invention for achieving the above object has a shaft which is inserted into a hollow pipe to transmit a rotational force and to be slippery. A joint and a yoke joint which is provided on both sides of the slip joint and is hollow so as to wrap the pipe and the shaft on one side facing the joint, and between the pipe and the shaft and both ends of the slip joint. And an elastic means that is installed between the yoke joint and generates an elastic force in the radial direction.

[0026]

DETAILED DESCRIPTION OF THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 4 is a sectional view showing a universal joint according to the present invention. As shown in the figure, the universal joint is divided into a slip joint 20 having a long shape as a whole and yoke joints 10 provided at both ends of the slip joint 20.

First, the yoke joint 10 is prepared by interlocking two yokes so that the rotational force can be transmitted even when the yoke joint 10 is bent at a predetermined angle or less.

Next, the slip joint 20 provided between the yoke joints 10 is formed by dividing the pipe 30 and the shaft 40 inserted into the pipe 30 so as to transmit the rotational force and at the same time to be slidable in the axial direction.

On the other hand, in the present invention, as shown in FIGS. 5 and 8, the slip joint 20 is interconnected between the pipe 30 and the shaft 40 and between the slip joint 20.
Elastic means and transmission means are provided between the yoke joint 10 and the yoke joint 10.

First, the pipe 3 of the slip joint 20
As the elastic means between the shaft 0 and the shaft 40, a plate-like member made of a metal material is wound on the outside so as to be expandable, and a hollow spring pin 150 (Spring) with one outer circumference cut out.
Pin) is prepared. That is, it has a substantially tubular shape,
Notches (slits) extending from one end to the other end are formed in the peripheral wall in the axial direction.

The spring pin 150 is provided in a state of being contracted toward the center so that the distance between the two ends of the outer periphery, which are spaced apart from each other, is narrowed, and after installation, elastic force is generated on the outside. .

That is, the spring pins 150 are provided in close contact with each other between the inner surface of the pipe 30 and the outer surface of the shaft 40, and transmit the rotational force therebetween, and three spring pins are provided at mutually corresponding positions. It

Next, the pipe 3 of the slip joint 20
The transmission means for transmitting the rotational force provided between the shaft 0 and the shaft 40 is provided for transmitting a larger rotational force therebetween.

That is, the transmission means is the spring pin 1.
A pair of installation grooves 110 and 120, which form a circular groove facing each other on the inner surface of the pipe 30 and the outer surface of the shaft 40 so that 50 can be inserted, and are provided at three positions so as to correspond to the spring pin 150. To be done.

At this time, the combined diameter of the installation grooves 110 and 120 is prepared so as to be in close contact with the outer diameter of the spring pin 150 when the outer shape of the spring pin 150 is contracted and assembled.

The transmitting means is a coupling protrusion 140 formed on the outer surface of the shaft 40, and the coupling protrusion 14
It is prepared with a coupling groove 130 which is formed by being recessed on the outer peripheral side inside the pipe 30 so that 0 can be inserted.

That is, the three installation grooves 120 and the coupling protrusions 140 are prepared outside the shaft 40 so as to form an equal angle, and the installation grooves 110 and the inside of the pipe 30 correspond to the installation grooves 110 and 110, respectively. The coupling groove 130 is prepared.

At this time, the installation grooves 110 and 120 and the coupling groove 1
30 has the same shape, and the coupling protrusion 140 protrudes in a shape similar to that of the spring pin 150.
20 and the coupling groove 130 are selectively inserted.

Such elastic means and transmission means are similarly applied between the slip joint 20 and the yoke joint 10 as shown in FIGS. 6 and 8.

At this time, since the connection between the shaft 40 of the slip joint 20 and the yoke joint 10 is the same as the connection between the pipe 30 of the slip joint 20 and the yoke joint 10, the pipe 30 and the yoke joint 10 are used in this embodiment. The connection with and will be described in examples.

The elastic means between the slip joint 20 and the yoke joint 10 is prepared by three spring pins 150 arranged at mutually corresponding positions.

The transmission means between the slip joint 20 and the yoke joint 10 is a spring pin 150.
Are provided with a pair of installation grooves 160, 170 facing each other at three points on the outer surface of the pipe 30 and the inner surface of the yoke joint 10 to form circular grooves.

The transmission means between the slip joint 20 and the yoke joint 10 is a coupling protrusion 190 formed on the outer surface of the pipe 30, and an outer peripheral side inside the yoke joint 10 so that the coupling protrusion 190 can be inserted. It is prepared by the recessed coupling groove 180.

That is, three installation grooves 170 and three coupling projections 190 are provided at the outside of the pipe 30 at equal angles, and the inside of the yoke joint 10 is connected to the installation grooves 160 in a corresponding manner. A groove 180 is prepared.

At the same time, as shown in FIG. 7, one spring pin 150 is inserted into the installation grooves 110, 120, 160 and 170, and a fixing pin 200 made of a general metal material is inserted into the rest. In some cases.

In such a case, although the elastic force is reduced, a larger rotational force can be transmitted, so that the number of spring pins 150 and fixed pins 200 to be inserted may be adjusted as necessary.

FIG. 9 is an exploded perspective view showing still another embodiment according to the present invention, and the other components excluding the elastic means and the transmission means will be described using the same names and the same reference numerals.

First, the pipe 3 of the slip joint 20
The elastic means between 0 and the shaft 40 are provided by spring pins 350 arranged on both sides facing each other.

The spring pin 350 is a hollow tube in which a plate-like material made of a metal material is wound and one side of the outer circumference is cut out, and a cross section in a radial direction so that the pipe 30 and the shaft 40 are closely adhered to each other. Is a long hole.

That is, the spring pin 350 has a flat cross section in the radial direction so as not to rotate, and is in a state of being crimped to the center side so that the distance on one side of the outer circumference is narrowed. It is provided.

Next, the pipe 3 of the slip joint 20
The transmission means between 0 and the shaft 40 connects the pipe 30 and the shaft 40 more firmly in the rotational direction, and is connected to the outer surface of the shaft 40 and the inner surface of the pipe 30 so that the spring pin 350 can be inserted. It is prepared in a pair of installation grooves 310 and 320 facing each other.

That is, the installation grooves 310 and 320 are
In order to correspond to the external shape of the spring pin 350, the elongated hole is formed in a substantially half-divided shape, and the spring pin 350 is provided in a compressed state inside when facing each other.

The pipe 3 of the slip joint 20
The transmission means between 0 and the shaft 40 is prepared by a coupling protrusion 340 protrudingly formed on the outer surface of the shaft 40 and a coupling groove 330 corresponding to the coupling protrusion 340 which is recessed on the outer peripheral side. .

That is, two coupling protrusions 340 are prepared on the outside of the shaft 40 in a direction intersecting with the two mounting grooves 320, and the pipe 30 is coupled with the mounting grooves 310 correspondingly. A groove 330 is prepared.

At this time, the installation grooves 310 and 320 and the coupling groove 3
The same shape as that of 30, and the coupling protrusion 34
The number 0 is prepared to be similar to the external shape of the spring pin 350 so that it can be selectively inserted into the installation grooves 310 and 320 and the coupling groove 330.

At the same time, such elastic means and transmission means are similarly applied between the slip joint 20 and the yoke joint 10.

At this time, the connection between the shaft 40 of the slip joint 20 and the yoke joint 10 is the same as the connection between the pipe 30 of the slip joint 20 and the yoke joint 10, so that in this embodiment, the pipe 30 and the yoke joint 10 are connected. The connection with and will be described as an example.

First, the elastic means between the slip joint 20 and the yoke joint 10 is arranged on both sides facing each other, and the spring pin 350 having a long hole in the radial cross section.
Will be prepared in.

Next, the transmission means between the slip joint 20 and the yoke joint 10 has a long hole in the cross section which is faced to the outer surface of the shaft 40 and the inner surface of the pipe 30 so that the spring pin 350 can be inserted. It is prepared in a pair of installation grooves 360, 370.

Further, the transmission means between the slip joint 20 and the yoke joint 10 is a coupling protrusion 390 protruding from the outer surface of the pipe 30 and a coupling recessed correspondingly to the inside of the yoke joint 10. Groove 3
Prepared at 80.

That is, two coupling protrusions 390 are prepared on the outside of the pipe 30 in a direction intersecting with the two installation grooves 370, and inside the yoke joint 10, corresponding installation grooves 360 are formed. A coupling groove 380 is prepared.

At this time, the installation grooves 360, 370 and the coupling groove 3
The same shape as 80 is prepared, and the coupling protrusion 390
The external shape of the spring pin 350 is prepared so that it can be selectively inserted into the installation grooves 360, 370 and the coupling groove 380.

The universal joint of the present invention thus constructed has the coupling grooves 130, 180, 330, 38.
The coupling protrusions 140, 190, 340, and 390 are axially inserted into the shaft 0 to fix the shaft 40 of the slip joint 20, the pipe 30, and the slip joint 20 and the yoke joint 10 in the rotational direction.

At this time, the coupling protrusions 140, 190, 34
0, 390 to the coupling grooves 130, 180, 330, 380 and the installation grooves 110, 120, 160, 170, 310, 3
Since the connection protrusions 140, 190, 340, 390 are not inserted, the connection grooves 130, 180, 330, 380 or the installation grooves 110, 120, 160, 170, 310, which are not provided in the connection protrusions 140, 190, 340, 390, are installed. 32
0, 360, 370 are facing installation grooves 110, 120,
A space into which the spring pins 150 and 350 can be inserted is formed between the springs 160 and 170, 310, 320, 360 and 370.

Then, with the shaft 40 of the slip joint 20 and the pipe 30 and the slip joint 20 and the yoke joint 10 temporarily fixed in the rotational direction,
The coupling grooves 130, 180 prepared so as to face each other,
330, 380 or installation grooves 110, 120, 160,
Installation grooves 110, 120, 160, 170, 310, 32 facing 170, 310, 320, 360, 370.
Spring pins 150 and 3 inside the 0, 360, 370
50 is contracted in the radial direction and inserted.

For this reason, the spring pin 150,
350 causes elastic force to be generated on the outer side to closely adhere between the shaft 40 of the slip joint 20 and the pipe 30, and between the slip joint 20 and the yoke joint 10, and at the same time fix them in the rotational direction and the axial direction, and after installation, Reduces the vibration generated from the shaft 40 and the pipe 30 of the slip joint 20 and from the slip joint 20 and the yoke joint 10.

As described above, in the universal joint of the present invention, between the pipe and the shaft and between the both ends of the slip joint and the yoke joint, the pipe and the shaft and the shaft are connected so that the transmission of the rotational force can be improved. Transmission means integrally formed with the slip joint and the yoke joint are prepared, and the elastic means is formed such that one side of a hollow outer periphery is formed in a cutout shape in the axial direction and is crimped to the center side, and is provided on the outer peripheral side. A spring pin for generating an elastic force, wherein the transmission means is arranged such that the spring pin is compressed and can be inserted, and the inside of the pipe and the outside of the shaft and the inside of the yoke joint and the pipe which face each other in a radial direction are opposed to each other. It may be an installation groove formed outside.

Further, in the universal joint of the present invention, the elastic means is provided with a hollow outer circumference one side formed in an axially incised shape and crimped to the center side to provide an elastic force on the outer circumference side. The pipe and the shaft and the both ends of the slip joint and the yoke joint are integrally formed with the pipe and the shaft and the slip joint and the yoke joint, respectively, so as to improve the transmission of the rotational force. A transmission means is provided, which is arranged inside the pipe and the outside of the shaft, which face each other in the radial direction, and inside the yoke joint and outside of the pipe, respectively, so that the spring pin can be compressed and inserted. It is a mounting groove formed, and the spring pin has a radial direction so as not to rotate in the circumferential direction. Surface is prepared in the long holes may be a radial cross-section is formed in half of the elongated hole so that the installation groove corresponding thereto.

Further, in the universal joint of the present invention, the pipe, the shaft and the slip joint may be improved between the pipe and the shaft and between the both ends of the slip joint and the yoke joint so as to improve the transmission of rotational force. And a yoke joint, each of which is integrally formed with each other. The transmission means are arranged so that the spring pin can be inserted by being compressed. Installation grooves formed inside the joint and outside the pipe, respectively, wherein the transmission means includes an outer periphery of one end of the shaft inserted into the pipe and one end of the pipe inserted into the yoke joint. The coupling protrusion formed to protrude to the side and the above-mentioned corresponding to the coupling protrusion. And a coupling groove formed by being depressed inside the yoke joint, the inner diameters of the installation groove and the coupling groove having the same shape are alternately arranged in mutually symmetrical positions, and the spring pin and The coupling projections may have the same outer diameter, and the spring pin and the coupling projection may be selectively inserted into the installation groove and the coupling groove.

[0071]

As described in detail above, the universal joint according to the present invention includes elastic means provided by, for example, a spring pin and a pin between the pipe and the shaft of the slip joint and between the slip joint and the yoke joint. , For example, it comprises a transmission means prepared in the installation groove, the coupling protrusion and the coupling groove.

For this reason, the slip pin slips smoothly between the pipe and the shaft due to the spring pin and the pin that partially connect the pipe and the shaft to reduce noise and vibration when the length of the slip joint is variable. It has the advantage of improving the reliability of the product.

Further, since the rotational force transmitting structure is simplified, the steps of manufacturing and assembling the slip joint and the yoke joint are facilitated, which has an advantage that the manufacturing cost can be reduced.

At the same time, it is possible to compensate for the play between the slip joint pipe and the shaft and between the slip joint and the yoke joint in the rotational direction, reduce the play noise generated between them, and to smoothly transmit the rotational force. There are advantages that can be obtained.

Since the spring pin is made of a metal material between the slip joint and the yoke joint, there is an advantage that rigidity at high temperature and low temperature and rigidity for transmitting the rotational force are improved.

Separate parts for assembling the slip joint and the yoke joint are provided inside and outside the slip joint and the yoke joint by providing the connecting groove and the connecting protrusion integrally prepared with the slip joint and the yoke joint. There is an advantage that a separate step for can be deleted.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a conventional universal joint.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a sectional view taken along the line BB of FIG.

FIG. 4 is a cross-sectional view showing a universal joint according to an embodiment of the present invention.

5 is a cross-sectional view taken along the line CC of FIG.

6 is a cross-sectional view taken along the line DD of FIG.

FIG. 7 is a cross-sectional view taken along the arrow, showing another embodiment of the present invention.

FIG. 8 is an exploded perspective view of the universal joint according to the embodiment of the present invention.

FIG. 9 is an exploded perspective view of another embodiment of the present invention.

[Explanation of symbols]

10 Yoke joint 20 Slip joint 30 Pipe 40 Shaft 110, 120, 160, 170, 310, 320, 3
60, 370 Installation groove (transmission means) 130, 180, 330, 380 Coupling groove (transmission means) 140, 190, 340, 390 Coupling protrusion (transmission means) 150, 350 Spring pin (elastic means) 200 Fixed pin (transmission means) )

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor John-Sik, Park             South Korea, Kangwon-do, Wonju-             Si Hung-Dong 1850, Kon Young Apa             Statement 103-604

Claims (8)

[Claims] 1. A slip joint in which a shaft is inserted into a hollow pipe prepared so as to transmit torque and slip, and a slip joint provided on both sides of the slip joint, and one side facing the slip joint. A yoke joint that is hollow so as to wrap the pipe and the shaft, and elastic means that is inserted and installed between the pipe and the shaft and between both ends of the slip joint and the yoke joint to generate elastic force in the radial direction. A universal joint characterized by being equipped with. 2. The pipe and the shaft and the both ends of the slip joint and the yoke joint are integrally formed with the pipe and the shaft and the slip joint and the yoke joint, respectively, so as to improve the transmission of rotational force. The universal joint according to claim 1, wherein a transmission means to be formed is prepared. 3. The elastic means is a spring pin having a hollow outer peripheral side formed in an axially incised shape and being crimped to the center side to generate an elastic force on the outer peripheral side. The universal joint according to claim 1. 4. The transmitting means is formed inside the pipe and the outside of the shaft, which face each other in the radial direction, and inside the yoke joint and outside of the pipe, respectively, so that the spring pin can be compressed and inserted. The universal joint according to claim 2, wherein the universal joint is an installation groove. 5. The coupling means includes a coupling protrusion projectingly formed on an outer peripheral side of one end of the shaft inserted into the pipe and one end of the pipe inserted into the yoke joint. The universal joint according to claim 2, wherein the joint joint is a recess formed in the pipe and the yoke joint so as to correspond to the protrusion. 6. A plurality of the installation grooves are formed at positions corresponding to each other, and a fixing pin having an outer diameter corresponding to the installation groove is inserted in a part of the installation groove. The universal joint according to Item 4. 7. The spring pin is provided with a long hole in a radial cross section so as not to rotate in the circumferential direction, and the installation groove is formed with a half in the radial cross section so as to correspond thereto. The universal joint according to claim 3, wherein 8. The installation groove and the coupling groove are prepared so that the inner diameters thereof have the same shape and are alternately arranged at symmetrical positions, and the outer diameters of the spring pin and the coupling protrusion are prepared in the same shape, and the installation is performed. The universal joint according to claim 4, wherein the spring pin and the coupling protrusion are selectively inserted into the groove and the coupling groove.