KR20190140223A - A stopper ring of a constant velocity joint and the constant velocity joint comprising the stopper ring - Google Patents

Abstract

The present invention relates to a fixed ring for a constant velocity joint and a constant velocity joint including the same, and more specifically, to a fixed ring for a constant velocity joint and a constant velocity joint including the same, which can be easily detached from and mounted on a joint housing and can be stably prevented from being released from a track groove. The fixed ring for a constant velocity joint includes: first ring regions spaced apart from each other; a second ring region provided between the first ring regions and protruding from the first ring regions by being located on a plane different from the first ring regions; and a third ring region extending from the first ring regions, and including cut wires and an opening between the cut wires.

Description

Retaining ring for constant velocity joint and constant velocity joint comprising same {A stopper ring of a constant velocity joint and the constant velocity joint comprising the stopper ring}

The present invention relates to a fixed ring for a constant velocity joint and a constant velocity joint including the same, and in particular, easy to remove and mount from the joint housing, while fixing the constant velocity joint that can stably prevent the roller from being separated from the track groove. A ring and a constant velocity joint comprising the same.

In general, a Tripod Constant Velocity Joint is a joint housing integrally connected to a stub shaft, and inserted into an internal track of the joint housing and splined to a half shaft to transfer power. It is composed of a spider, three trunnions formed on the outer circumferential surface of the spider, and a roller assembly inserted into the trunnion to absorb relative motion generated between the track and the trunnion of the joint housing.

Relative motion occurs between the track, trunnion, and roller assembly of the joint housing when the stub and half shafts of the tripod constant velocity joint are bent, and the frictional forces generated by the relative motion generate axial forces in the axial direction of the half shaft. The axial force has a maximum of three times for each revolution of the constant velocity joint.

The configuration of such a tri-pod constant velocity joint is disclosed in Korea Patent Registration 10-0741308.

On the other hand, the roller assembly slides in the joint housing, guides the plunging motion between the stub shaft and the half shaft, and by this plunging motion, the angle between the two shafts can be made.

There is a need for a configuration that serves as a locking jaw so that the roller assembly does not move while moving in the joint housing, a fixing ring that can be caught by the roller assembly near the opening of the joint housing serves.

The retaining ring consists of a piano wire material, forms an annular shape, and usually has a two-dimensional shape.

This fixing ring is fixed to the mounting groove provided near the joint housing opening.

Thus, the position at which the roller assembly is caught by the retaining ring means the maximum plungable limit position of the joint, at which point maximum cutting is possible.

However, when the fixing ring is separated from the joint housing, a part of the wire is cut off and then pulled out to perform a separation operation. In this case, since the cut area is located in a mounting groove inside the joint housing, a separate tool is used. There was the inconvenience of working with.

 Even in the case of assembling the fixing ring in the joint housing, the whole fixing ring had to be fitted into the closed groove-shaped mounting groove formed along the inner surface of the joint housing.

In addition, it was difficult to check whether it is properly assembled or fastened, and there was an inconvenience of touching it with a hand to check it by touch.

The present invention has been made to solve such a problem, the present invention has an object to easily separate or assemble the joint housing and the fixing ring, and to easily check the assembled state with the naked eye.

The present invention for achieving this object, in the fixed ring for constant velocity joint, the fixing ring; A first ring region provided in plurality and spaced apart from each other; A second ring region provided between the first ring regions and protruding from the first ring region by being located on a plane different from the first ring region; And a third ring region extending from the first ring region and including a cut wire and an opening between the cut wires.

The first ring region and the second ring region are connected by a connecting portion, wherein the connecting portion includes a first connecting portion extending in a direction bent at an end of the first ring region, and a first connecting portion is bent at an end of the first connecting portion. And a second connection portion which is bent in a direction different from the extending direction and extended to be connected to an end of the second ring region.

The first connecting portion extends in a direction crossing with respect to an end of the first ring region, and the second connecting portion extends in a direction crossing with respect to an end of the first connecting portion.

The second ring region may include a first wire part and a second wire part bent at both ends of the first wire part and connected to the connection part.

The third ring region in which the opening is formed is characterized by being composed of two cutting wires in a symmetrical shape.

The present invention also provides a joint housing; A spider movably disposed in the joint housing and having a trunnion; A plurality of roller assemblies rotatably supported by the trunnions; A retaining ring disposed adjacent the opening of the joint housing and in contact with the roller assembly to prevent the roller assembly from leaving the joint housing; A first ring region provided in plurality and spaced apart from each other; A second ring region provided between the first ring regions and formed to protrude from the first ring region by being located on a plane different from the first ring region; And a third ring region extending from the first ring region, the third ring region including a cut wire and an opening between the cut wires.

The joint housing includes a track groove in which the roller of the roller assembly moves, a boundary wall portion provided between the track grooves, and a fixing groove formed on the front surface of the boundary wall portion to which the fixing ring is inserted and fixed. It is disposed in close contact with the inlet edge of the track groove, the first ring region is characterized in that it is arranged to be fitted into the fixing groove.

The first ring region and the second ring region are connected by a connecting portion, wherein the connecting portion includes a first connecting portion extending in a direction bent at an end of the first ring region, and a first connecting portion is bent at an end of the first connecting portion. A second connecting portion bent in a direction different from the extending direction and connected to an end portion of the second ring region, wherein the connecting portion is disposed on the side of the inlet edge of the track groove, and the distance between each connecting portion is greater than the width of the track groove. It is characterized in that the narrow roller is formed to move the track groove to prevent the departure from the track groove.

The third ring region in which the opening is formed is composed of two cutting wires symmetrical to each other, and the two cutting wires are disposed in close contact with the track groove inlet edge.

According to the present invention having the configuration described above, the first region constituting the fixing ring is inserted into the mounting groove, the second region and the third region can be exposed to the outside in close contact with the inlet edge of the joint housing, the first region By pushing only the part into the mounting groove, the fixing ring can be easily and quickly assembled to the joint housing.

In addition, the third region, which is composed of two cutting wires separated from each other with an opening in between, is exposed to the outside of the joint housing, and when the fixing ring is separated from the joint housing, it is easily fixed by holding and pulling the cutting wire end. The ring can be detached from the joint housing.

That is, in the prior art, such a cut end is coupled to a mounting groove inside the joint housing, and the surrounding thereof is covered with grease, so that it is difficult to separate it, but in the present invention, grease Since there is a cut wire portion in the outer region, not the inner region of the joint housing, which is covered by the furnace, there is an advantage that it can be easily and quickly detached without a separate separation tool.

In addition, there is an advantage that the assembly state between the fixing ring and the joint housing can be easily confirmed with the naked eye.

1 is an exploded perspective view of a constant velocity joint according to the present invention.
Figure 2 is a view from various angles of the fixing ring according to the present invention.
Figure 3 is a perspective view showing a coupling and separation between the fixing ring and the joint housing according to the present invention.
4 is an internal perspective view of a constant velocity joint with a fixing ring according to the present invention.
5 is a front view of a constant velocity joint with a fixing ring according to the present invention.
Figure 6 is a side sectional view of a constant velocity joint with a retaining ring according to the present invention.
Figure 7 is a side cross-sectional view showing a plunging state in a constant velocity joint with a fixing ring according to the present invention.

As the invention allows for various changes and numerous embodiments, particular embodiments will be illustrated and described in the drawings.

However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

Terms including ordinal numbers such as first and second may be used to describe various components, but the components are not limited by the terms.

The terms are used only for the purpose of distinguishing one component from another.

For example, without departing from the scope of the present invention, the second component may be referred to as the first component, and similarly, the first component may also be referred to as the second component.

The term and / or includes a combination of a plurality of related items or any item of a plurality of related items.

When a component is referred to as being "connected" or "connected" to another component, it may be directly connected to or connected to that other component, but it may be understood that other components may be present in between. Should be.

On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it should be understood that there is no other component in between.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention.

Singular expressions include plural expressions unless the context clearly indicates otherwise.

In this application, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

 DETAILED DESCRIPTION Hereinafter, exemplary embodiments will be described in detail with reference to the accompanying drawings, and the same or corresponding components will be given the same reference numerals regardless of the reference numerals, and redundant description thereof will be omitted.

1 is an exploded perspective view of a constant velocity joint in which the fixing ring of the present invention is employed.

The constant velocity joint 1 is connected to the main shaft 2 connected to the engine and has a joint housing 10 having a track 11 formed therein, and is accommodated in the joint housing 10 and has a trunnion 21. It includes a spider 20 and a roller assembly 30 is rotatably inserted into the trunnion (21).

The roller assembly 30 includes an inner roller, a needle bearing surrounding the inner roller, an outer roller surrounding the needle bearing, and a retainer ring disposed on the upper and lower surfaces of the outer roller.

 Three roller assemblies are provided, and each roller assembly 30 is disposed in the track groove 11 formed in the joint housing 10.

The roller assembly 30 disposed on the track 11 may perform a slide movement along the track groove 11 while rolling.

Three track grooves 11 are provided to be spaced apart from each other, and a boundary wall 13 is formed between each track groove 11.

The driven shaft 40 is coupled to the center hole 22 of the spider 20.

Therefore, when the main shaft 2 rotates, power is transmitted in the order of the outer roller, the needle bearing, the inner roller, the trunnion, and the spider of the roller assembly 30, and the driven shaft 40 rotates.

When the driven shaft 40 makes an angle with respect to the main shaft 2, the roller assembly 30 moves along the track groove 11 according to the state of the angle, and accordingly, the main shaft 2 and the driven shaft ( The total length of 40) increases or decreases.

In this way, the movement of the power transmission distance (ie, the combined length of the main shaft and the driven shaft) while the roller assembly 30 moves is referred to as plunging.

In order for the driven shaft 40 to be fully articulated relative to the main shaft 2, the roller assembly 30 and the spider 20 must be located near the opening 12 of the joint housing 10.

In this case, the roller assembly 30 and the spider 20 should be kept in their position, but should be prevented from escaping from the joint housing 10. To this end, the fixing ring 100 is disposed inside the joint housing 10 to perform a kind of locking step.

The fixing ring 100 is composed of a piano steel wire material, but is not limited thereto.

The mounting groove 13a is formed on the inner surface of the edge of the opening 12 of the joint housing 10 for mounting the fixing ring 100. Specifically, the mounting groove 13a is formed on the front surface of the three boundary walls 13. It is formed in the part, and is not open toward the front, but is open toward the inner direction, which is the rotation center of the joint housing 10.

2 (a) to 2 (d) are views of the fixing ring 100 viewed from various angles.

As shown in FIGS. 2A to 2D, the fixing ring 100 includes a plurality of first ring regions 110, a plurality of second ring regions 120. 121, and an opening 131. And third ring regions 130 and 131 formed of two cutting wires 130 forming a.

The two cutting wires 130 are preferably provided in a left-right symmetrical form based on a virtual vertical line passing through the center of the fixing ring.

As will be described later, the first ring region 110 is a portion which is inserted into and fixed to the mounting groove 13a provided in the boundary wall 13 of the joint housing 10, and the second ring regions 120 and 121 are the track grooves 11. It is a part in close contact with the inlet front edge 10a.

The third ring regions 130 and 131 are also in close contact with the front surface of the inlet edge 10a of the track groove 11. Meanwhile, the first ring region 110 and the second ring regions 120 and 121 are connected by the connecting portions 111 and 112, and also the first ring region 110 and the third ring regions 130 and 131. ) Is also connected by the connecting portions (111, 112).

The connecting portions 111 and 112 may be formed by extending the first connecting portion 111 extending in the direction bent at the end of the first ring region 110 and the first connecting portion 111 bent at the end of the first connecting portion 111. It includes a second connecting portion 112 is bent in a direction different from the direction to be extended and connected to the end of the second wire portion 121 constituting the second ring region (120, 121).

In addition, in the case of the connecting portions 111 and 112 connecting the first ring region 110 and the third ring regions 130 and 131, the first ring extending in the direction bent at the end of the first ring region 110 is also provided. Two cutting parts forming the third ring regions 130 and 131 by bending the connection part 111 and extending in a direction different from the direction in which the first connection part 111 is bent and extended at the end of the first connection part 111. An end of the wire 130 and the second connector 112 is included.

The first connector 111 extends forward from both ends of the wire constituting the first ring region 110, and the extending direction is a direction crossing or perpendicular to the wire constituting the first ring region 110.

The second connector 112 extends in a plane while extending in a direction crossing or orthogonal to the end of the first connector 111, and the direction extending in the plane extends obliquely to an imaginary vertical line passing through the center of the ring. It is preferable.

The distance between the connecting portions 111 and 112 connected to one side of one second ring region 120 and 121 and the connecting portions 111 and 112 connected to the other side is the width of one track groove 11 and one It is formed narrower than the width of the roller assembly (30).

Thus, when plunging occurs and the roller assembly 30 moves to the inlet of the joint housing 10, the roller assembly 30 is prevented from being caught outside the joint housing 10 by being caught between the connecting portions 111 and 112.

The first ring region 110 and the second ring regions 120 and 121 are disposed on different planes, so that the second ring regions 120 and 121 protrude forward than the first ring region 110. It is preferable to provide.

In addition, the first ring region 110 and the third ring regions 130 and 131 are also disposed on different planes, and the third ring regions 130 and 131 protrude forward than the first ring region 110. Preferably, the second ring regions 120 and 121 and the third ring regions 130 and 131 are preferably placed on the same plane.

3, the first ring region 110 should be installed in the mounting groove 13a of the joint housing 10, and the second ring regions 120 and 121 and the third ring region 130, Since 131 should be in close contact with the front edge 10a of the joint housing 10, the planes arranged in this way are different.

As shown in Fig. 3, the positions of each of the extension parts 111 and 112 are disposed on both sides of the inlet of each track groove 111, and are exposed to both sides of each mounting groove 13a. do.

In this state, since the first ring region 110 is inserted into the mounting groove 13a, the first ring region 110 is positioned inside the joint housing 10, and the second ring regions 120 and 121 and the third ring region ( 130 and 131 are in close contact with the inlet edge 10a of the joint housing 10 and are exposed to the outside, thereby being located outside the joint housing 10.

When the first ring region 110 is correctly inserted and fixed in the mounting groove 13a, the second ring regions 120 and 121 and the third ring regions 130 and 131 naturally have an inlet edge of the joint housing 10. 10a), the operator can see only the second ring region 120, 121 and the third ring region 130, 131 is in close contact with the inlet edge (10a) of the joint housing 10, the first ring region It can be seen that 110 is inserted into the mounting groove 13a correctly.

That is, even if only the second ring regions 120 and 121 and the third ring regions 130 and 131 are in close contact with the inlet edge 10a of the joint housing 10, the fixing ring 100 is connected to the joint housing 10. It can be confirmed that it is assembled surely.

Each of the connecting portions 111 and 121 is disposed at both sides of the inlet of the track groove 111, and is exposed to both sides of each of the mounting grooves 13a, so that each connecting portion is larger than the maximum outer diameter of the roller assembly 30. The interval between the 111 and 121 is narrow, so that the roller assembly 30 may be caught between the connecting portions 111 and 121.

On the other hand, the two cutting wires 130 of the third shape forming the ring region 130, 131 is exposed in close contact with the inlet edge (10a) of the joint housing (10). Therefore, when the worker easily grasps one of the cutting wires 130 and pulls it toward the center point of the joint housing 10, the adjacent first ring region 110 is separated from the mounting groove 13a to be separated and separated. By the force transmission of the other first ring region 110 is also sequentially separated from the mounting groove (13a).

In the prior art, if the cut portion of the retaining ring is in a mounting groove in the joint housing, a separate removal tool had to be inserted into the joint housing to separate the cut portion of the ring from the mounting groove and pull it out. The invention places the cut portion of the retaining ring (the opening 131 and the cutting wire 130 on both sides of the opening 131) out of the joint housing 10, thereby quickly and easily without the need for a separate removal tool. The fixing ring 100 may be separated from the joint housing 10.

As shown in FIG. 4, when the roller assembly 30 is located inside the joint housing 10, the roller assembly 30 may move forward and backward along the track groove 11.

And, the inlet portion of the joint housing 10 is blocked by the fixing ring 100, it is possible to prevent the separation of the roller assembly 30 to the outside.

As shown in FIG. 5, the positions of the connecting portions 111 and 121 protrude further inward in the direction of the track groove 11 than the positions of the ends of the second wires 121 constituting the second ring regions 120 and 121. do.

Herein, the protruding length corresponds to the length of the second extension part 112, and the first extension part 111 extends in the plunging direction of the roller assembly 30 and is disposed in an axial form, thereby providing the first extension part 111. ) Roller assembly 30 is caught and touched to prevent separation. On the other hand, since the first extension portion 111 is provided in the form of an axis lying in the plunging direction, the second extension portion 112 extends in the bent direction and is connected to the second ring regions 120 and 121. When the roller assembly 30 collides, the shock can be effectively buffered, and durability can be increased.

That is, if the part to which the roller assembly 30 is caught is simply formed orthogonal to the moving direction of the roller assembly 30, it may be easily deformed or broken by a moment.

However, as in the present invention, the portion where the roller assembly 30 is caught is a portion (first extension portion 111) extending in the same direction as the moving direction of the roller assembly 30, and the portion that is connected to the portion. Since the two extension parts 112 are bent in a direction orthogonal to or intersecting with the moving direction of the roller assembly 30 and are connected to the second wires 112 constituting the second extension parts 120 and 121, a kind of frame In this configuration, even when there is an impact with the roller assembly 30, the impact can be alleviated.

As shown in FIG. 6, an inclined portion is formed at the front end portion of the boundary wall 13 that partitions the track groove 11, and is provided to extend outwardly toward the inlet portion of the joint housing 10.

Let the inclined surface in front of the mounting groove 13a be called the 1st inclined surface 13b, and let the rear inclined surface in the 2nd inclined surface 13c. The height of the rear wall of the mounting groove 13a is formed higher than the height of the front wall of the mounting groove 13a, since the mounting groove 13a is formed on the inclined surface.

In such a structure, when the first ring region 110 of the fixing ring 100 comes into contact with the first inclined surface 13b and is pushed in, the first ring region 110 is gradually compressed to meet the mounting groove 13a, thereby reducing the elastic restoring force. It is expanded by being inserted into the mounting groove 13a and fixed.

The first ring region 110 of the fixing ring 10 is inserted into the mounting groove 13a, and the first ring region 110 is inserted in the outer circumferential direction of the joint housing 10. It is a direction toward the rotation center axis of the joint housing 10, and the front-back direction of the mounting groove 13a is blocked by the front wall and the rear wall of the mounting groove 13a.

Accordingly, even when the fixing ring 100 blocks the roller assembly 30 and the roller assembly 30 is caught, the first ring region 110 is blocked by the front wall of the mounting groove 13a. ) Is prevented from being separated by the mounting groove 13a.

As shown in Fig. 7 (a), the roller assembly 30 is fixed by plunging, as shown in Fig. 7 (b), with the roller assembly 30 spaced apart without contacting the fixing ring. When moving in the (100) direction, the moving portion to the extension portion (111, 112) of the fixing ring 100, and can no longer move outward can be prevented from leaving.

As described above, the present invention has been described with reference to the embodiments shown in the drawings, but it is only for the purpose of describing the present invention, and those skilled in the art to which the present invention pertains various modifications or equivalents from the detailed description of the invention. It will be appreciated that one embodiment is possible.

Therefore, the true scope of the present invention should be determined by the technical spirit of the claims.

10: joint housing 10a: inlet border
11: track groove 13: boundary wall
13a: mounting groove 30: roller assembly
100: fixing ring 110: first ring region
111: first connection portion 112: second connection portion
120: first wire 121: second wire
130: opening 131: cutting wire

Claims (9)

In the fixed ring for constant velocity joints,
The fixing ring is; A first ring region provided in plurality and spaced apart from each other;
A second ring region provided between the first ring regions and formed to protrude from the first ring region by being positioned on a plane different from a plane where the first ring region is located;
And a third ring region extending from the first ring region and including a cut wire and an opening between the cut wires. The method of claim 1,
The first ring region and the second ring region are connected by a connecting portion,
The connecting portion includes a first connecting portion extending in a direction bent at the end of the first ring region,
And a second connection part bent and extended in a direction different from a direction in which the first connection part is bent and extended at an end of the first connection part to be connected to an end of the second ring region. The method of claim 2,
The first connecting portion extends in a direction crossing with respect to the end of the first ring region,
The second connection portion is a fixed ring for the constant velocity joint, characterized in that extending in the direction crossing with respect to the end of the first connection portion. The method of claim 2,
And the second ring region includes a first wire portion and a second wire portion bent from both ends of the first wire portion and connected to the connection portion. The method of claim 1,
The third ring region in which the opening is formed is fixed ring for the constant velocity joint, characterized in that consisting of two cutting wires of the shape symmetrical to each other. A joint housing;
A spider movably disposed in the joint housing and having a trunnion; A plurality of roller assemblies rotatably supported by the trunnions;
A fixing ring disposed adjacent the opening of the joint housing and in contact with the roller assembly to prevent the roller assembly from escaping out of the joint housing,
The fixing ring is; A first ring region provided in plurality and spaced apart from each other;
A second ring region provided between the first ring regions and formed to protrude from the first ring region by being positioned on a plane different from a plane where the first ring region is located;
And a third ring region extending from the first ring region, the third ring region including a cut wire and an opening between the cut wires. The method of claim 6,
The joint housing includes a track groove in which the roller of the roller assembly moves, a boundary wall portion provided between the track grooves, and a fixing groove formed at the front surface of the boundary wall portion to which the fixing ring is inserted and fixed.
The second ring area is arranged in close contact with the inlet edge of the track groove,
The first ring region is a constant velocity joint, characterized in that arranged to be fitted into the fixing groove. The method of claim 7, wherein
The first ring region and the second ring region are connected by a connecting portion,
The connecting portion includes a first connecting portion extending in a direction bent at an end of the first ring region,
A second connector bent and extended in a direction different from a direction in which the first connector is bent and extended at an end of the first connector, and connected to an end of the second ring region;
The connecting portion is disposed on the side of the inlet edge of the track groove, the interval of each connection portion is formed narrower than the width of the track groove is a constant velocity joint characterized in that the roller moving the track groove is caught to prevent the departure from the track groove. The method of claim 7, wherein
The method of claim 1,
The third ring region in which the opening is formed is composed of two cutting wires of symmetrical shape, both cutting wires are arranged in close contact with the track groove inlet edge.

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