JP3467187B2 - Retaining ring assembly device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a retaining ring assembling device for assembling a retaining ring into a shaft or a hole of a work.

[0002]

2. Description of the Related Art A retaining ring has been conventionally used to hold a component fitted in a shaft or a hole, such as for preventing the bearing from falling off.
As is well known, there are two types of retaining rings, one for shafts and one for holes, and they are used properly according to their applications. For attaching the retaining ring, a retaining ring assembling device 200 as shown in FIG. 17 is generally used. This snap ring assembling device 200 is for mounting a snap ring for a hole, and is arranged on a collet 210 that can be moved forward and backward by the operation of a cylinder mechanism (not shown), and on the moving path of this collet 210. The insertion guide 220 has a large diameter portion 221 into which the tip of the collet 210 can enter without being squeezed, and a taper portion that continuously decreases in diameter to the large diameter portion 221. A guide hole 224 formed of a small diameter portion 223 that is continuous with the tapered portion 222 and has the same diameter as the hole of the workpiece into which the snap ring is inserted.
Are formed.

As shown in FIG. 18, the retaining ring R1 has a large diameter portion 2 of the insertion guide 220 with the guide hole 224 of the insertion guide 220 set to communicate with the hole h of the work W.
21, and is pressed by the collet 210, compressed along the tapered portion 222 and the small diameter portion 223, inserted into the hole h of the work W, and assembled in a groove (not shown) provided in the hole.

[0004]

In the above-mentioned conventional snap ring assembling apparatus, the collet is constructed so that the diameter thereof can be narrowed by providing a slit as is well known, whereby the collet can be deformed along the guide hole. It is like this. Therefore, the collet is deformed improperly due to the restoring force of the retaining ring that is deformed along the guide hole, which causes a problem that the retaining ring is tilted and clogged in the guide hole. Further, since the collet is deformed along the tapered portion of the guide hole, its stroke is almost determined depending on the slope angle of the tapered surface, and for example, the groove for mounting the snap ring is deep in the hole. In the case where it is provided, there is a problem that it cannot be dealt with.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a retaining ring assembling apparatus capable of reliably attaching a retaining ring to a work. . In order to achieve such an object, the present invention provides a pressing member into which a non-deformed retaining ring before being assembled in a hole or a shaft of a work can be fitted, and a pressing member slidably inserted along the pressing member. A diaphragm member having a convex portion projecting toward the tip side along the peripheral surface of the first guide portion, a first guide portion on which the pressing member can slide, and a second guide capable of guiding a retaining ring fitted on the peripheral surface of the pressing member. And an insertion guide formed by extending a recess that can be matched with the projection from the end surface on the side of the second guide member to at least a boundary portion between the taper portion and the first guide portion. Is configured.

According to the present invention, the second reciprocating drive source is installed on the table which is reciprocally movable by being driven by the first reciprocating drive source, and the pressing member is connected to the second reciprocating drive source. The diaphragm member is continuously provided on the table so as to be located concentrically with the pressing member, and a support member that is movable and relatively movable integrally with the table is provided below the table. The insertion guide may be attached so as to be positioned coaxially with the pressing member. In that case, the pressing member is actuated by the second reciprocating drive source, and its tip end surface coincides with the tip end surface of the convex portion of the diaphragm member.
It is desirable that the tip surface is configured to move to a position where it reaches the snap ring mounting position of the workpiece, and the table has a first reciprocating drive source for the snap ring mounting operation.
It is desirable that the thrust be applied.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 to 5, reference numeral 1 denotes a retaining ring assembling device for attaching a retaining ring R1 for a hole to a work according to a first embodiment of the present invention, which includes a pressing member 10, a diaphragm member 20, and an insertion guide 30. It is composed of three parts.

The pressing member 10 is a shaft-shaped part having a circular cross section, and the retaining ring R1 for the hole which is not compressed (deformed) on the peripheral surface can be fitted into the hole h of the work W. It has a cross-sectional shape that can be inserted. The diaphragm member 20 is a tubular member that is slidably inserted along the peripheral surface of the pressing member 10, and extends at the tip thereof along the axial direction of the pressing member 10 and at the periphery of the pressing member 10. A convex portion 21 having a shape along the surface is integrally formed. This convex portion 21
The four press members 10 are formed in parallel with each other so that they can come into contact with the end surface of the retaining ring R1 fitted into the press member 10.

On the other hand, the insertion guide 30 serves as the pressing member 1.
A first guide portion 31 having a cross-sectional shape that allows 0 to slide, a second guide portion 32 having a cross-sectional shape that can guide the outer diameter portion of the retaining ring R1, the second guide portion 32, and the first A guide hole 34 formed of a taper portion 33 connecting the guide portion 31 is formed in a sleeve shape, and a peripheral wall thereof has a tapered portion 33 and a first guide portion 31 from the end surface on the second guide portion 32 side. The recessed portion 3 extending partway through the first guide portion 31 through the boundary portion with
5 is cut out. The concave portion 35 corresponds to the convex portion 21.
It is formed at four positions corresponding to the formation positions of, and is configured so that the corresponding convex portions 21 can be matched. In addition,
It is necessary to set the convex portion 21 of the diaphragm member 20 longer than the concave portion 35.

The retaining ring assembling device 1 is used when manually attaching the retaining ring R1 for a hole, and the retaining ring R1 is fitted to the tip of the pressing member 10 and The insertion guide 30 is united with. At this time, the convex portion 21 of the throttle member 20 matches the concave portion 35 of the insertion guide 30, and the pressing member 10 is the first guide portion 3 of the insertion guide 30.
Insert through 1. As a result, the retaining ring R1 is
While being guided by the guide portion 32, it is pushed by the convex portion 21 of the diaphragm member 20, and is retained by the pressing member 10 and the taper portion 33 in the correct posture.

Next, as shown in FIG. 6 (a), the first guide portion 31 of the insertion guide 30 is made to communicate with the hole h for attaching the retaining ring R of the work W, and then as shown in FIG. 6 (b). Then, the pressing member 10 is retracted so that the tip end surface of the pressing member 10 and the tip end surface of the convex portion 21 of the diaphragm member 20 are flush with each other.
And release the fitting of retaining ring R. Then, in this state, FIG.
As shown in (a), when the pressing member 10 and the diaphragm member 20 are integrally advanced, the retaining ring R1 advances in the concave portion 35 and the convex portion 2 advances.
It is pushed by 1 and gradually inserted along the tapered portion 33 into the first guide portion 31. At this time, since the tip end surface of the convex portion 21 and the tip end surface of the pressing member 10 are on the same plane above the retaining ring R1, the second guide portion 32 side of the retaining ring R1 (the large diameter of the taper portion 33 is formed by these. (Radial side) is blocked. Therefore, it is possible to prevent the retaining ring R1 from escaping and tilting due to the repulsive force generated when the retaining ring R1 is compressed along the tapered portion 33.
It is possible to favorably perform the compression deformation of

Then, as shown in FIG. 7B, when only the pressing member 10 is advanced, the retaining ring R is pushed by the pressing member 10 and is pushed into the hole h of the work W from the first guide portion 31, It reaches the groove for mounting the snap ring and fits into it.

Next, as a second embodiment of the present invention, a snap ring assembling apparatus 100 for a shaft shown in FIGS. 8 to 11 will be described. This snap ring assembling apparatus 100 for a shaft is obtained by improving the components of the snap ring assembling apparatus 1 for a hole as described above for a shaft.

First, regarding the pressing member 110, this is
Peripheral surface-shaped hole 1 in which the outer diameter portion of the shaft retaining ring R2 can be fitted
It is constituted by a sleeve-shaped member having 11. Further, the diaphragm member 120 is composed of a shaft-shaped member that slides inside the pressing member 110, and a convex portion 121 that extends in the axial direction and is formed along the hole 111 of the pressing member 110 at the tip thereof. Are integrally formed in two locations in parallel. Further, the insertion guide 130 has a first guide portion 1 having a cross-sectional shape in which the pressing member 110 can slide.
31 and the second guide portion 1 in which the inner diameter portion of the retaining ring R can be fitted.
32, the second guide portion 132, and the first guide portion 131
And a taper portion 133 that connects to the second guide portion 132, extends from the end surface on the side of the second guide portion 132 through the boundary portion between the first guide portion 131 and the taper portion 133 to the middle of the first guide portion 131, and is a recess formed by slotting. 135 is formed. This recess 135
Are formed in parallel at two locations corresponding to the convex portions 121, and the corresponding convex portions 121 can be matched.

When assembling the retaining ring R2 with this retaining ring mounting device 100 for the shaft, first the first guide portion 131 is the work W.
The insertion guide 130 is set on the work W so as to be on the side, and the retaining ring R2 is fitted to the second guide portion 132 of the work W, and then the pressing member 110 and the diaphragm member 120 are combined with the insertion guide 130. As a result, the convex portion 121 of the diaphragm member 120 matches the concave portion 135 of the insertion guide 130,
The pressing member 110 is the first guide portion 1 of the insertion guide 130.
Insert through 31. As a result, the retaining ring R2 becomes the second
The convex portion 12 of the diaphragm member 120 is guided by the guide portion 132.
It is pushed by 1, and is held by the pressing member 110 and the tapered portion 133 in a correct posture. The subsequent operation is the same as that for the hole, and the retaining ring R2 is expanded by the pressing member 110 and the diaphragm member 120 along the tapered portion 133 without tilting and reaches the first guide portion 131. ,
The work W is assembled by being pressed by the pressing member 110.

Next, a retaining ring assembling apparatus 50 according to a third embodiment of the present invention shown in FIGS. 12 to 14 will be described. The retaining ring attachment device 50 includes a pressing member 10, a diaphragm member 20, and an insertion guide 3 according to the first embodiment.
0 is applied to an automatic unit, and is provided with an air cylinder 53 which is an example of a first reciprocating drive source arranged on a frame 52 attached to a machine base 51. The air cylinder 53 is set so that a rod 53a extends vertically downward, and a table 55 on which an air cylinder 54, which is an example of a second reciprocating drive source, is set is connected to the rod 53a. The table 55 is fixed to a sliding member 57a which is slidable along a guide shaft 56 arranged on the frame 52, and a diaphragm member 20 'is attached to a lower surface of the table 55 via a hollow bracket 58. ing. Further, the rod 54a of the air cylinder 54 is
A pressing member 10 'that extends into the bracket 58 and is inserted into the diaphragm member 20' is connected to the tip of the bracket 58.

On the other hand, a connecting rod 59 extending vertically downward is attached to the table 55, and a supporting member 60 extending parallel to the table 55 is connected to the tip of the connecting rod 59. This support member 60
Is a sliding member 57b slidable along the guide shaft 56.
The insertion guide 30 'is located at the tip of the insertion member and is coaxial with the pressing member 10'.
Is attached. In addition, the connecting rod 59 is
The supporting member 60 is inserted, and the supporting member 60 is hung and supported by an engaging member 59a attached to the tip of the supporting member 60. Further, the guide shaft 56 is provided between the sliding members 57a and 57b. A spring 61 is fitted so as to be compressed and always urge the support member 60 toward the tip end side of the connecting rod 59.

In the structure of the pressing member 10 ', the throttle member 20', and the insertion guide 30 'in this snap ring assembling device 50, although the connecting portions with the air cylinders for connecting and supporting them are slightly changed, The structure of the part that influences the operation of the wheel is exactly the same as that described in the first embodiment. However, because the retaining ring must be held, the pressing member incorporates a steel ball 63 urged by a spring 62 so as to project from the circumferential surface of the pressing member, as shown in FIG. Also, the pressing member 10 '
When the rod 54a of the air cylinder 54 is extended, the rod 5a is inserted through the insertion guide 30 'and protrudes in front of the insertion guide 30'.
When 4a is retracted, the tip end surface of the diaphragm member 20 'has a convex portion 21.
It is configured to retreat to a position corresponding to the tip surface. The rod 54a of the air cylinder 54 is always set in an extended state.

The operation of the snap ring assembling device 50 is as follows. (1) The retaining ring R1 is fitted and held on the pressing member 10 '. (2) The table 55 and the supporting member 60 are integrally advanced by the operation of the air cylinder 53, whereby the insertion guide 30 ′ is brought into contact with the work W, and the hole h of the work W is communicated with the guide hole 34. As a result, the support member 60 stops. (3) Subsequently, the table 55 advances with respect to the stopped supporting member 60, whereby the pressing member 10 'passes through the guide hole 34 of the insertion guide 30' and is stopped in the hole h of the work W. The throttle member 20 ′ is advanced to the groove position for wheel assembly, and the protrusion member 20 ′ is advanced to the position where the convex portion 21 matches the concave portion 35 of the insertion guide 30 ′. Therefore, the retaining ring R1 is pushed by the convex portion 21 and the taper portion 33 and the pressing member 10 are pressed.
It is held properly by being locked to the peripheral surface. At this time, the rod 53a of the air cylinder 53 is not fully extended, and therefore the pressing member 10 'and the throttle member 20' have the air cylinder 5
Thrust by 3 is acting. (4) Then, the air cylinder 54 is operated and the rod 54
When a is retracted, the pressing member 10 '
Moves back to a position where its tip end surface is flush with the tip end surface of the convex portion 21 of the diaphragm member 20 '. (5) When the tip surface of the pressing member 10 'and the tip surface of the convex portion 21 are flush with each other, the fitting between the pressing member 10' and the retaining ring R1 is released. Therefore, the pressing member 10 '
And the throttle member 20 'receives the thrust force of the air cylinder 53 and integrally moves forward, and pushes the retaining ring R1 along the guide hole 34 to compress it. (6) Then, when the air cylinder 54 extends the rod 54a again, the retaining ring R1 is pushed by the pushing member 10 'and pushed into the hole h of the work W, and reaches the groove to be fitted therein.

In this third embodiment, the retaining ring R
1, the pressing member 10 ', the diaphragm member 20',
The respective operations of the insertion guide 30 'are basically the same as those of the first embodiment described above, but these are the air cylinders 53, 54.
It is very accurate and stable due to the operation of. . That is, the operation of the air cylinders 53 and 54 causes the tip end surface of the pressing member 10 'and the convex portion 2 of the diaphragm member 20'.
The tip surface of 1 can be surely matched, and moreover,
These positional relationships can be maintained and these can be swiftly and reliably turned forward.

Next, a retaining ring assembling apparatus 150 according to the fourth embodiment of the present invention shown in FIG. 15 will be described.
This snap ring assembling apparatus 150 has the same basic configuration as that described in the second embodiment with respect to the configuration of the above-described third embodiment, a pressing member 110 ', a diaphragm member 120', and an insertion guide 130 '. Is applied. That is, the retaining ring assembling device 150 is an automatic unit for assembling the retaining ring R2 for the shaft, and the pressing member 110 ′ is connected to the rod 54a of the air cylinder 54 via the bracket 64, and the throttle member 120 is connected. ′ Is directly fixed to the table 55. In addition, the insertion guide 130 ′ is the support member 60.
It is supported by a plate member 60a fixed to the ‘ As shown in FIG. 16A, the plate member 60a has a thickness that allows passage through the opening of the retaining ring R2.
As shown in FIG. 16B, the pressing member 110 ′ corresponding to 0 a has a groove 110 having a width that allows the plate material 60 a to pass therethrough.
a is formed to extend in the axial direction.

The above is the embodiment of the present invention. The steel ball for retaining the retaining ring described in the third embodiment is the pressing member in the first embodiment, or the second and fourth embodiments. It can also be provided in the insertion guide or the like in the above embodiment. Also, by changing the shape of the push rod,
Needless to say, it can be applied to retaining rings defined by JIS such as C-shaped concentric, E-shaped, and grip, and retaining rings having a shape similar to these. Note that the number of convex portions of the diaphragm member is not limited to the number of installations in the above description, and any number can be provided around the center line along the pressing member. The number of recesses in the guide can be arbitrarily selected.

[0023]

As described above, the device for assembling the snap ring of the present invention is for assembling the snap ring in the snap ring mounting groove provided in the hole of the work or on the shaft. It has a pressing member into which a non-deformed retaining ring before fitting can be fitted, and a convex portion which is slidably inserted along the pressing member and protrudes toward the tip side along the peripheral surface of the pressing member. A diaphragm member, a first guide portion having a shape in which the pressing member is slidable, and a first guide portion positioned closer to the pressing member than the first guide portion and capable of guiding the retaining ring between the pressing member and the peripheral surface thereof. The two guide portions, the taper portion connecting the first guide portion and the second guide portion, and the convex portion that extends from the end surface on the side of the second guide member to at least the boundary portion between the taper portion and the first guide portion can be matched. And an insertion guide having a recess.

According to this snap ring mounting device, the snap ring can be pushed by the convex portion of the diaphragm member and locked by the pressing member and the taper portion of the insertion guide, so that the snap ring before assembly is correct. Can be held in a posture. Further, with the tip end surface of the pressing member and the tip end surface of the convex portion of the diaphragm member aligned on the same plane, these are positioned so that the tip end of the convex portion of the diaphragm member reaches the first guide portion along the concave portion of the insertion guide. Therefore, the retaining ring held in the correct posture can be deformed (compressed or expanded) along the tapered portion in a favorable and smooth manner without being tilted, so that the workpiece can be reliably assembled. Moreover, since a collet is not used as in the prior art, various materials for obtaining expensive materials such as spring steel and elasticity are unnecessary, and a snap ring assembly device can be provided at a very low cost. There are advantages.

Further, by arranging the pressing member, the diaphragm member and the insertion guide to operate in response to the operation of a reciprocating drive source such as an air cylinder, the operation of assembling these retaining rings can be performed accurately and quickly. It is possible to achieve high speed work cycle and improvement of retaining ring assembly accuracy. In addition, according to the present invention, by simply changing the length of the pressing member, it is possible to reliably assemble the retaining ring to various workpieces including workpieces in which the assembly position of the retaining ring is set deep in the hole. There are also advantages such as

[Brief description of drawings]

FIG. 1 is a front view of a retaining ring assembly apparatus according to a first embodiment of the present invention.

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

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

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

FIG. 5 is an enlarged partial cutaway sectional view of essential parts showing a state in which a retaining ring is held by the retaining ring assembly apparatus according to the first embodiment of the present invention.

FIG. 6 is an operation explanatory view of the retaining ring assembling device according to the first embodiment of the present invention.

FIG. 7 is an operation explanatory view of the retaining ring assembling device according to the first embodiment of the present invention.

FIG. 8 is a front view of a retaining ring assembly apparatus according to a second embodiment of the present invention.

9 is a cross-sectional view taken along the line AA of FIG.

10 is a sectional view taken along line BB of FIG.

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

FIG. 12 is a front view in which a part of a snap ring assembling device according to a third embodiment of the present invention is a cutaway section.

FIG. 13 is an enlarged partial cutaway plan view of an essential part near an insertion guide of a retaining ring assembling apparatus according to a third embodiment of the present invention.

FIG. 14 is an enlarged partial cutaway cross-sectional view of an essential part showing a tip of a pressing member of a retaining ring assembling apparatus according to a third embodiment of the present invention.

FIG. 15 is a front view in which a part of a snap ring assembling device according to a fourth embodiment of the present invention is a cutaway section.

FIG. 16 is an enlarged partial cutaway plan view of an essential part near an insertion guide of a retaining ring assembling apparatus according to a fourth embodiment of the present invention.

FIG. 17 is an enlarged cross-sectional view of a main part of a conventional example.

FIG. 18 is an operation explanatory diagram of a conventional example.

[Explanation of symbols]

1,100,50,150 Retaining ring assembly device 10, 10 ', 110, 110' Pressing member 20, 20 ', 120, 120' diaphragm member 21,121 convex 30,30 ', 130,130' Insertion guide 31,131 First guide member 32,132 Second guide member 33, 133 taper 34 Guide hole 35,135 recess 53 Air cylinder 54 Air cylinder 55 table 60 Support member

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B23P 19/02 B25B 27/20

Claims (4)

(57) [Claims] 1. A retaining ring assembling device for assembling a retaining ring into a retaining ring mounting groove provided in a hole of a work or on a shaft, which is not deformed before being assembled into a hole or shaft of the work. A pressing member into which the ring can be fitted, a diaphragm member that is slidably inserted along the pressing member, and has a convex portion that projects to the tip side along the peripheral surface of the pressing member, and the pressing member is slidable. The movable first guide portion and the second guide portion capable of guiding the retaining ring fitted to the peripheral surface of the pressing member are continuously provided by the tapered portion, and the concave portion with which the convex portion can match is formed into the second guide. A retaining ring assembling apparatus, comprising: an insertion guide formed by extending from an end surface on the member side to at least a boundary portion between the tapered portion and the first guide portion. 2. A second reciprocating drive source is installed on a table which is reciprocally movable under the drive of the first reciprocating drive source, the pressing member is connected to the second reciprocating drive source, and the table is mounted on the table. The diaphragm member is continuously provided so as to be located concentrically with the pressing member, and a support member that is movable and relatively movable integrally with the table is provided below the table. The snap ring assembling apparatus according to claim 1, wherein the insertion guide is attached so as to be located on a coaxial line with the snap ring. 3. The pressing member is actuated by a second reciprocating drive source and has a position where its tip end surface coincides with the tip end surface of the convex portion of the diaphragm member and a position where the tip end surface reaches a work ring mounting position. 3. It is configured to move to
Retaining ring assembly device according to. 4. The retaining ring assembling apparatus according to claim 2, wherein the first reciprocating drive source applies thrust to the table during the retaining ring assembling work.