KR102305585B1 - Apparatus for coupling snap ring - Google Patents

Abstract

One embodiment of the present invention provides a snap ring coupling device capable of easily coupling the snap ring to the shaft. Here, the snap ring coupling device includes an outer housing, an inner housing, a coupling shaft, a bulim, a first elastic member, and a second elastic member. The outer housing has a first accommodating space formed in the axial direction at the inner center, and a first opening formed at one end and connected to the first accommodating space. The inner housing is provided in the first accommodating space, and has a second accommodating space penetrating through the inner center in the axial direction. The coupling shaft is provided to reciprocate in the axial direction in the first accommodating space, protrudes outward through the first opening, and is coupled to one end of the target shaft. The opening is provided between the outer housing and the coupling shaft in the first opening, and a snap ring to be coupled to the target shaft is disposed on the outer circumferential surface, and the diameter of the snap ring is expanded while being pushed in the coupling shaft moving in the inner housing direction and moved in the radial direction. . The first elastic member is provided in the second accommodating space, and elastically supports the coupling shaft in the target axial direction, and the second elastic member is provided in the first accommodating space, and elastically supports the inner housing in the target axial direction. In a state in which one end of the coupling shaft is coupled to one end of the target shaft, the outer housing moves in the target shaft direction to push the snap ring, the diameter of which is expanded by the bulge, in the target shaft direction.

Description

Snap ring coupling device {APPARATUS FOR COUPLING SNAP RING}

The present invention relates to a snap ring coupling device, and more particularly, to a snap ring coupling device capable of easily coupling the snap ring to a shaft.

A shaft assembly provided in a machine or mechanism includes various devices assembled on the shaft to transmit or support power. And various devices coupled to a certain position of the shaft are generally fixed by a concentric snap ring having a C-shape.

Although the shaft assembly is made by various processes installed on the shaft, including shaft processing, the snap ring fixed on the shaft expands the gap of the snap ring and it is difficult to insert it on the shaft, so the coupling is done by hand.

As such, when the shaft assembly operation is performed manually, manpower for manual operation must be input, and it is not only cumbersome to manually spread the snap ring to combine it with the shaft, but also has a disadvantage in that the operation is difficult as it is a process that requires considerable force. It takes a long time, and there is a problem in that productivity is lowered.

Republic of Korea Patent Publication No. 2010-0135066 (published on December 24, 2010)

In order to solve the above problems, the technical problem to be achieved by the present invention is to provide a snap ring coupling device capable of easily coupling the snap ring to the shaft.

The technical problems to be achieved by the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by those of ordinary skill in the art to which the present invention belongs from the description below. There will be.

In order to achieve the above technical object, an embodiment of the present invention includes: an outer housing having a first accommodating space formed in an axial direction at an inner center, and a first opening formed at one end and connected to the first accommodating space; an inner housing provided in the first accommodating space and having a second accommodating space penetrating through the inner center in the axial direction; a coupling shaft provided to reciprocate in the axial direction in the first accommodating space, the coupling shaft protruding outward through the first opening and coupled to one end of the target shaft; It is provided between the outer housing and the coupling shaft in the first opening, and a snap ring to be coupled to the target shaft is disposed on an outer circumferential surface, and the snap ring is radially moved while being pushed by the coupling shaft moving in the inner housing direction. bulim to expand the diameter of; a first elastic member provided in the second accommodating space and elastically supporting the coupling shaft in the direction of the target axis; and a second elastic member provided in the first accommodating space and elastically supporting the inner housing in the target axis direction, wherein one end of the coupling shaft is coupled to one end of the target shaft, the outer housing is It provides a snap ring coupling device, characterized in that by moving in the target axis direction and pushing the snap ring, the diameter of which is expanded by the bullim sphere, in the target axis direction.

In an embodiment of the present invention, the beollim sphere is provided along the circumferential direction of the coupling shaft and has a plurality of bulim pieces having a first inner diameter, and the coupling shaft has a first larger than the first inner diameter at one end. It has a pressing part formed to have an outer diameter, and when the coupling shaft is moved in the direction of the inner housing, the pressing part may radially push the beollim piece so that the diameter of the snap ring is expanded.

In an embodiment of the present invention, the pressing portion may have a first inclined portion whose diameter becomes smaller toward the other end of the coupling shaft.

In an embodiment of the present invention, the coupling shaft is formed protruding at one end, and is inserted into a center hole formed at one end of the target shaft so that the coupling shaft is concentric with the target shaft.

In an embodiment of the present invention, the second inner diameter of the first opening may be formed to be larger than the second outer diameter of the beollim piece so that the bulim piece moves in the radial direction.

In an embodiment of the present invention, when the coupling shaft moves in the direction of the inner housing, the first elastic member is compressed, and when the outer housing moves in the direction of the target axis, the second elastic member is compressed, The first elastic member may have a first modulus of elasticity, and the second elastic member may have a second modulus of elasticity greater than the first modulus of elasticity.

In an embodiment of the present invention, a collar is further disposed at one end of the outer housing, and the outer housing moves in the target axis direction to simultaneously push the collar and the snap ring in the target axis direction. have.

According to an embodiment of the present invention, a snap ring is provided on the outer circumferential surface of the beollim sphere, and in a state where the collar is provided in front of the outer housing, the beollim piece is moved in the radial direction to expand the diameter of the snap ring, and the outer housing is moved in the target axis direction. By simultaneously pushing the collar and the snap ring in the direction of the target shaft, the snap ring and the collar can be coupled to the target shaft at the same time.

It should be understood that the effects of the present invention are not limited to the above-described effects, and include all effects that can be inferred from the configuration of the invention described in the detailed description or claims of the present invention.

1 is a perspective view showing a snap ring coupling device according to an embodiment of the present invention.
FIG. 2 is an exploded perspective view of FIG. 1 .
3 is a cross-sectional perspective view of FIG. 1 .
Figure 4 is a cross-sectional view showing the coupling shaft and the bullimgu of Figure 1 as a center.
5 is an exemplary view illustrating an example in which the snap ring coupling device of FIG. 1 and the collar and the snap ring are coupled.
6 and 7 are cross-sectional views for explaining an example of operation of the snap ring coupling device of FIG. 1 .

Hereinafter, the present invention will be described with reference to the accompanying drawings. However, the present invention may be embodied in several different forms, and thus is not limited to the embodiments described herein. And in order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.

Throughout the specification, when a part is “connected (connected, contacted, coupled)” with another part, it is not only “directly connected” but also “indirectly connected” with another member in between. “Including cases where it is In addition, when a part "includes" a certain component, this means that other components may be further provided without excluding other components unless otherwise stated.

The terms used herein are used only to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In this specification, terms such as “comprise” or “have” are intended to designate that the features, numbers, steps, operations, components, parts, or combinations thereof described in the specification exist, and one or more other features It should be understood that this does not preclude the existence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing a snap ring coupling device according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of FIG. 1, FIG. 3 is a cross-sectional perspective view of FIG. 1, and FIG. It is an exemplary cross-sectional view showing the center.

1 to 4 , the snap ring coupling device includes an outer housing 100 , an inner housing 200 , a coupling shaft 300 , a bullim sphere 400 , a first elastic member 500 and a second elastic member. (600).

The outer housing 100 may have a first accommodating space 110 , a first opening 120 , and a push unit 150 .

The first accommodating space 110 may be formed in the inner center of the outer housing 100 in the axial direction. The first accommodating space 110 may be formed through the outer housing 100 .

The first opening 120 may be formed at one end of the outer housing 100 to be connected to the first accommodating space 110 .

Hereinafter, for convenience of explanation, the left direction will be described as a front/front/front end and the right direction as a rear/rear/rear end with reference to FIG. 3 . Accordingly, the first opening 120 may be formed at the front end of the outer housing 100 .

The push unit 150 may be formed to protrude from the front end of the outer housing 100 , and may be formed to extend in the circumferential direction. As will be described later, the push unit 150 may push the snap ring 20 in the direction of the target axis.

The inner housing 200 may be provided in the first accommodating space 110 . The inner housing 200 may have an outer diameter smaller than the inner diameter of the first accommodating space 110 . Accordingly, in a state in which the inner housing 200 is fixed, the outer housing 100 reciprocates along the axial direction. can be moved

The inner housing 200 may have a second accommodating space 210 formed through the inner center in the axial direction.

The coupling shaft 300 may be provided to reciprocate in the axial direction in the first accommodating space 110 .

The coupling shaft 300 may have a pressing portion 310 , an attachment 320 , and a first flange 330 .

First, the attachment 320 may be formed at the front end of the coupling shaft 300 . Attachment 320 may be formed so as to decrease in diameter toward the front of the coupling shaft 300 .

The pressing part 310 may be formed in the rear of the attachment 320 . When the coupling shaft 300 moves forward, the attachment 320 and the pressing part 310 may protrude forward through the first opening 120 . The pressing part 310 may be formed to have a first outer diameter D2.

The first flange 330 may be formed at the rear end of the coupling shaft 300 . A first groove portion 331 may be formed at the rear end of the first flange 330 . In addition, a protruding ring portion 332 may be formed at the front end of the first flange 330 . The protrusion ring part 332 may be formed to extend in the circumferential direction.

The bulim 400 may be provided between the outer housing 100 and the coupling shaft 300 in the first opening 120 . The beollim sphere 400 may have a plurality of beollim pieces 410 .

The flared piece 410 may be provided along the circumferential direction of the coupling shaft 300 , and may have a first inner diameter D1 .

The flared piece 410 may have a second flange 411 at the rear end, and the second flange 411 may be in close contact with the front end of the inner housing 200 and may not move backward. In addition, the step portion 102 may be formed at the front end of the inner circumferential surface of the outer housing 100 , and the second flange 411 may be caught by the step portion 102 . Through this, the forward movement of the beollim piece 410 is constrained to prevent the beollim piece 410 from coming out of the front of the outer housing 100 .

The first outer diameter D2 of the pressing part 310 may be formed to be larger than the first inner diameter D1 of the bulging piece 410 . Therefore, when the coupling shaft 300 is moved in the direction of the inner housing 200, the pressing part 310 pushes the beveling pieces 410 in the radial direction, and each of the beolph pieces 410 is provided independently of each other. Therefore, it can be moved in the radial direction.

The second outer diameter D3 of the beveling piece 410 may be smaller than the second inner diameter D4 of the first opening 120 so that the beveling piece 410 can be moved in the radial direction.

The snap ring 20 to be coupled to the target shaft by the snap ring coupling device is provided on the outer circumferential surface of the beveling piece 410, and when each of the beveling pieces 410 is moved in the radial direction by the coupling shaft 300, the beveling piece ( The diameter of the snap ring 20 provided on the outer circumferential surface of the 410 may be expanded.

The pressing part 310 may have a first inclined part 311 whose diameter decreases toward the rear end of the coupling shaft 300 . In addition, the bulim piece 410 may have a second inclined portion 415 in front of the inner circumferential surface.

When the coupling shaft 300 is moved to the rear, the first inclined portion 311 may be in close contact with the second inclined portion 415 while gently pushing the bulim piece 410 in the radial direction.

The rear end of the second flange 411 may have a second groove 412 recessed in the circumferential direction. The protrusion ring portion 332 formed on the first flange 330 of the coupling shaft 300 may be inserted into the second groove portion 412 , through which the coupling shaft 300 moves forward in the first accommodating space 110 . escape can be prevented.

The first elastic member 500 may be provided in the second accommodation space 210 . The rear end of the first elastic member 500 may be supported by the support 250 provided at the rear end of the inner housing 200 , and the front end may be supported by the first groove 331 of the coupling shaft 300 . . The first elastic member 500 may elastically support the coupling shaft 300 forward.

The snap ring coupling device may include a fixing plate 700 , and the fixing plate 700 may be coupled to the rear end of the outer housing 100 to block the first accommodating space 110 . A third groove 710 may be formed in the center of the fixing plate 700 .

The second elastic member 600 may be provided in the first accommodation space 110 . The rear end of the second elastic member 600 may be inserted into the third groove 710 of the fixing plate 700 , and the front end may be supported by the support 250 . Through this, the second elastic member 600 may elastically support the inner housing 200 forward.

The first elastic member 500 may have a first elastic modulus, and the second elastic member 600 may have a second elastic modulus greater than the first elastic modulus. That is, the first elastic member 500 may be compressively deformed even by a force weaker than that of the second elastic member 600 . Through this, the first elastic member 500 is first compressively deformed, and then the second elastic member 600 is compressively deformed, that is, the first elastic member 500 and the second elastic member 600 are sequentially deformed. can be subjected to compression deformation.

5 is an exemplary view illustrating an example in which the snap ring coupling device of FIG. 1 and the collar and the snap ring are coupled.

5, the attachment 320 of the coupling shaft 300 may be inserted into the center hole 12 formed at the rear end of the target shaft 10, and through this, the coupling shaft 300 ) and the target shaft 10 may be concentric. Here, the target shaft 10 is a shaft to which the snap ring 20 is to be coupled.

A roller 15 (refer to FIG. 6) may be further coupled to the target shaft 10, and the snap ring coupling device according to the present invention has a collar for preventing the roller 15 from being separated from the target shaft 10. ) 30 may be coupled to the target shaft 10 together with the snap ring 20 .

To this end, a configuration for fixing the collar in close contact with the collar 30 may be further formed on the front end of the outer housing 100 . For example, when the ring protrusion 31 is formed on the rear surface 11 of the collar 30 , a locking protrusion 190 corresponding to the ring protrusion 31 may be formed at the front end of the outer housing 100 . . When the rear surface of the collar 30 is in close contact with the front end of the outer housing 100 , rotation of the collar 30 may be prevented by the locking protrusion 190 and the ring protrusion 31 .

Hereinafter, an operation example of the snap ring coupling device will be described.

6 and 7 are cross-sectional views for explaining an example of operation of the snap ring coupling device of FIG. 1 .

First, as shown in (a) of FIG. 6 , a roller 15 may be coupled to the target shaft 10 , and a fitting groove 13 may be formed at the rear end of the target shaft 10 .

In addition, a snap ring 20 may be provided on the outer peripheral surface of the beollim piece 410 , and a collar 30 may be provided on the outer peripheral surface of the front end of the coupling shaft 300 . The snap ring 20 provided on the outer circumferential surface of the beollim piece 410 may be in close contact with the push unit 150 of the outer housing 100 .

And, as shown in (b) of Figure 6, when the attachment 320 of the coupling shaft 300 is inserted into the center hole 12 of the target shaft 10 by moving the snap ring coupling device forward, the coupling shaft ( 300 may be concentric with the target shaft 10 . In addition, when the snap ring coupling device is pressed in the direction of the target shaft 10 , the first elastic member 500 is compressed and the coupling shaft 300 may be moved backward.

At this time, the first force for pressing the snap ring coupling device in the direction of the target shaft 10 is not a size to compressively deform the second elastic member 600 , but a first force to compressively deform the first elastic member 500 . In this case, only the first elastic member 500 is compressed and the coupling shaft 300 is moved to the rear. Then, the beollim piece 410 is pushed out in the radial direction by the pressing part 310 , and the snap ring 20 provided on the outer circumferential surface of the beollim piece 410 may be opened and expanded in diameter. In this case, the beollim piece 410 may be expanded so that the outer diameter corresponds to the diameter of the target shaft 10 .

And, when the snap ring coupling device is pressed in the direction of the target shaft 10 with a second force greater than the first force to the extent that the second elastic member 600 is compressed, as shown in FIG. 7A , the second elastic member 600 is compressed. As the member 600 is also compressed, as the outer housing 100 is moved forward, the push unit 150 may push the snap ring 20 forward, and the snap ring 20 pushed and moved forward is the target shaft 10 . It can be inserted into the fitting groove 13 of the. The outer housing 100 may push the snap ring 20 forward and simultaneously push the collar 30 forward, and thus the collar 30 may also be coupled to the target shaft 10 . Typically, a seal 14 may be provided on the outer circumferential surface of the target shaft 10 , and the collar 30 may be coupled to the target shaft 10 so that the seal 14 is in close contact with the inner circumferential surface.

Then, as shown in (b) of FIG. 7, when the snap ring coupling device is moved to the rear, the first elastic member 500 and the second elastic member 600 are elastically restored to their initial shapes, and accordingly, the inner housing ( 200) and the coupling shaft 300 are also moved forward, and the beollim piece 410 may be moved in the central direction.

The above description of the present invention is for illustration, and those of ordinary skill in the art to which the present invention pertains can understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. For example, each component described as a single type may be implemented in a dispersed form, and likewise components described as distributed may be implemented in a combined form.

The scope of the present invention is indicated by the following claims, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention.

10: target shaft 20: snap ring
30: collar 100: outer housing
150: push unit 200: inner housing
300: coupling shaft 310: pressing part
400: Beollimgu 410: Beollimpyeon
500: first elastic member 600: second elastic member
700: fixed plate

Claims (7)

an outer housing having a first accommodating space formed at an inner center in the axial direction and a first opening formed at one end and connected to the first accommodating space;
an inner housing provided in the first accommodating space and having a second accommodating space penetrating through the inner center in the axial direction;
a coupling shaft provided to reciprocate in the axial direction in the first accommodating space, the coupling shaft protruding outward through the first opening and coupled to one end of the target shaft;
It is provided between the outer housing and the coupling shaft in the first opening, and a snap ring to be coupled to the target shaft is disposed on an outer circumferential surface, and the snap ring is radially moved while being pushed by the coupling shaft moving in the inner housing direction. bulim to expand the diameter of;
a first elastic member provided in the second accommodating space and elastically supporting the coupling shaft in the direction of the target axis; and
and a second elastic member provided in the first accommodating space and elastically supporting the inner housing in the direction of the target axis,
In a state in which one end of the coupling shaft is coupled to one end of the target shaft, the outer housing moves in the target axis direction to push the snap ring, the diameter of which is expanded by the bulim sphere, in the target axis direction. Snap ring coupling device. According to claim 1,
The beollim sphere is provided along the circumferential direction of the coupling shaft and has a plurality of bulim pieces having a first inner diameter,
The coupling shaft has a pressing portion formed at one end to have a first outer diameter greater than the first inner diameter,
When the coupling shaft is moved in the direction of the inner housing, the pressing unit radially pushes the beollim piece so that the diameter of the snap ring is expanded. 3. The method of claim 2,
The pressing portion is a snap ring coupling device, characterized in that it has a first inclined portion that becomes smaller in diameter toward the other end of the coupling shaft. 3. The method of claim 2,
The coupling shaft is
A snap ring coupling device, characterized in that it has an attachment protruding at one end and inserted into a center hole formed at one end of the target shaft so that the coupling shaft is concentric with the target shaft. 3. The method of claim 2,
The snap ring coupling device, characterized in that the second inner diameter of the first opening is formed to be larger than the second outer diameter of the beveling piece so as to move in the radial direction. According to claim 1,
When the coupling shaft moves in the direction of the inner housing, the first elastic member is compressed, and when the outer housing moves in the direction of the target axis, the second elastic member is compressed such that the first elastic member is first has a modulus of elasticity, and the second elastic member has a second modulus of elasticity greater than the first modulus of elasticity. According to claim 1,
A collar is further disposed at one end of the outer housing, and the outer housing moves in the target axis direction to simultaneously push the collar and the snap ring in the target axis direction.

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