JP2002326130A - Snap ring mounting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a snap ring mounting device that can reduce a working man-hour by dispensing with complex manual labor when a snap ring 13 with a closed slit portion is fitted in a circumferential groove in a shaft 11 of a rotary electric machine 1. SOLUTION: A movement of a split ring presser 7 in a snap ring fitting direction radially outwardly expands an inside diameter of the snap ring 13 moved in the snap ring fitting direction along an outer circumference of a taper portion and an outer circumference of a barrel portion of a capping mounting jig 6, so that the snap ring 13 can be easily fitted in a circumferential groove in the shaft 11 of the rotary electric machine 1. The snap ring 13 with a closed slit portion can be mounted in the circumferential groove in the shaft 11 without complex manual labor for inverting the capping mounting jig 6 among others, so that a working man-hour can be reduced and assembly cost can be also reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a snap ring mounting device for mounting a snap ring having a closed slit portion in a circumferential groove of a rotating shaft of a rotating body.

[0002]

2. Description of the Related Art FIGS. 5A and 5B show a conventional technique.
As shown in FIG.
2, the slit portion 103 is closed (for example, 0 to 0.5
When the snap ring 13 having a gap of about mm is mounted, the snap ring mounting jig 100 that pushes and expands the inner diameter of the snap ring 13 to the outside in the radial direction and mounts the snap ring 13 on the circumferential groove 102 of the shaft 101 includes the shaft 101. 104 fitted into the tip of the hollow portion and the hollow portion 1
05 is formed by a cylindrical ring insertion tool 106.

[0003]

However, in the snap ring mounting jig 100 having the above-described structure, first, as shown in FIG.
01 is fitted with a cap 104, a snap ring 13 is placed on the cap 104, and the ring inserter 106 is pushed to a predetermined position of a tapered portion 107 of the cap 104 at an end having a smaller inner diameter.

Further, as shown in FIG. 5 (c), the ring insertion tool 106 is turned over, and the ring insertion tool 106 is hit with a hammer at the end of the ring insertion tool 106 having the larger inner diameter. The snap ring 13 is attached to the peripheral groove 102 of the shaft 101 by pushing down along the outer peripheral surface of the cap 104 while pushing and expanding the inner diameter of the snap ring 13 outward in the radial direction. As described above, the ring insertion tool 10 for pushing the snap ring 13 in the direction of the circumferential groove 102 of the shaft 101 during the work of pushing and expanding the inner diameter of the snap ring 13 to the outside.
6 is required to be turned over.
It is necessary to hit 6 like a hammer. For this reason,
Complicated manual work is required, which is an obstacle in reducing the number of work steps.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to reduce the number of working steps by eliminating complicated manual work when mounting a snap ring having a slit portion closed in a circumferential groove of a rotating shaft of a rotating body. An object of the present invention is to realize a snap ring mounting device that can be used.

[0006]

According to the first aspect of the present invention, after the ring expanding member is mounted on the tip of the rotating shaft and the snap ring is fitted to the outer peripheral surface of the ring expanding member, When the split ring pressing tool is driven in the snap ring mounting direction, the snap ring whose slit portion is closed is pressed in the snap ring mounting direction with the movement of the split ring pressing tool. For this reason, the inner diameter of the snap ring moved in the snap ring mounting direction along the outer peripheral surface of the ring expanding member by the movement of the split type ring pressing tool in the snap ring mounting direction expands to the outside in the radial direction, and the snap ring rotates. Is mounted on the circumferential groove of the rotating shaft. As a result, the snap ring whose slit portion is closed can be attached to the circumferential groove of the rotating shaft of the rotating body without performing a complicated manual operation such as inverting the ring expanding member. The cost can be reduced, and the assembly cost can be reduced.

According to the second and third aspects of the present invention, the first and second locked portions of the ring expanding member are locked to the first and second locking portions of the fall prevention means. By doing so, the ring expanding member is held on the same axis as the snap ring,
In addition, it is possible to prevent the ring expanding member from falling off from the tip of the rotating shaft. According to the invention as set forth in claim 4, a plurality of contacts abutting on the snap ring on the outer peripheral surface of the ring expanding member, and these contacts are attached to the split-type ring pressing member by the ring expanding member. The present invention is characterized in that a contact urging means is provided on the outer peripheral surface for urging in a direction in which the snap ring contacts the snap ring.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS [Structure of Embodiment] An embodiment of the present invention will be described based on an embodiment with reference to the drawings. here,
1 and 2 are views showing a snap ring mounting device, and FIGS. 3 (a) to 3 (d) are views showing a snap ring mounting method.

As shown in FIG. 5 (a), the snap ring mounting device according to the present embodiment is provided in
The snap ring 13 made of metal or resin whose slit portion is closed is pushed outward and attached. Here, the snap ring 13 is a fitting component (not shown) press-fitted and fixed to the outer periphery of the shaft 11 of the rotary electric machine 1.
Is prevented from falling off the shaft 11.

The snap ring mounting device is provided in the form of a flat base board 3 provided horizontally above a base 2 placed on a horizontal floor, and provided in a horizontal direction above the base board 3. A movable plate 4 having a flat plate shape, a power source 5 provided above the movable plate 4, and a ring expanding member (hereinafter referred to as a cap-shaped mounting jig) for expanding the inner diameter of the snap ring 13 to about the outer diameter of the shaft 11. 6), a split ring pressing tool 7 provided to be fittable on the outer periphery of the cap-shaped mounting jig 6, and a drop for holding the cap-shaped mounting jig 6 on the same axis as the shaft 11. Prevention mechanism (corresponding to the fall prevention means of the present invention) 8.

The base board 3 is provided movably in the vertical direction in the figure along a plurality (four in this example) of guide bars 22 via each bearing 21. The base board 3 is urged downward in the figure (in the mounting direction of the snap ring 13) by a tension spring (mounting direction urging means / pulling direction urging means) 23. The upper end of the tension spring 23 is held by a pin 24 provided on the side surface of the base board 3, and the lower end of the tension spring 23 is held by a hook 25 fixed to the base 2.

The base board 3 has an insertion hole 27 through which a plurality of (two in this example) rods 26 are inserted. The lower end of the rod 26 is provided with a flange 28 for locking the base board 3 when the rod 26 moves upward in the figure. This allows
The rod 26 moves independently with respect to the base board 3 when the rod 26 itself descends downward in the drawing.
6 is configured to move integrally with the base board 3 when it rises upward in the figure.

However, since the base board 3 is urged downward in the figure by the spring force of the tension spring 23, when the rod 26 descends downward in the figure, it follows the flange 28 while contacting the flange 28. Descend as you do. The movable plate 4 fastens and fixes the upper end of the rod 26 in the figure. Accordingly, the movable plate 4 integrally lowers the rod 26 downward in the figure when the movable plate 4 itself lowers downward in the figure, and also integrally raises the rod 26 upward in the figure when the movable plate 4 itself rises upward in the figure. Also, a part of the movable plate 4 is provided with a mounting hole 4a for fixing a connecting member 29 for swingably holding the upper end of the split ring pressing tool 7 in the figure.

The power source 5 is constituted by an oil pressure cylinder in which a piston rod 30 moves downward in the figure by the action of oil pressure. The movable plate 4 and the split ring pressing tool 7 are fixed to the lower end of the piston rod 30 in the figure via a connecting member 29. Thus, when the power source 5 starts to operate, the piston rod 30 moves downward in the figure, and the movable plate 4 and the split ring pressing tool 7 also move downward in the figure (the snap ring 13).
(In the mounting direction). When the power source 5 operates in the reverse direction, the piston rod 30 moves upward in the figure, and the movable plate 4 and the split ring pressing tool 7 also move upward in the figure.

The cap-shaped mounting jig 6 is provided in a cap shape by a metal material, and as shown in FIG.
The body 31 is fitted to the outer periphery of the tip of the shaft 11 of the rotary electric machine 1, and a tapered portion 32 is integrally formed on the upper end side (tip side) of the body 31 in the figure. The torso portion 31 is located between the stepped portion 34 and
The lower part in the figure has an axial hole 33 having a larger inner diameter. Further, the body 31 is provided with the shaft 11 of the rotary electric machine 1.
Has an outer diameter that is substantially the same as the outer diameter, and has a cylindrical cross section.

On the outer peripheral surface of the body 31, a plurality (three in this example) of the first first members are arranged in the mounting direction of the snap ring 13, that is, from one end to the other end in the axial direction. Locking groove (corresponding to a first locked portion of the present invention) 41;
A plurality (three in this example) of second locking grooves (corresponding to a second locked portion of the present invention) 42 are sequentially formed. These first and second locking grooves 41 and 42 are respectively provided on the same axis and at equal intervals in the circumferential direction. Tapered part 3
2 is provided such that the outer diameter gradually increases from the size smaller than the inner diameter of the snap ring 13 in the initial state to about the maximum outer diameter of the shaft 11 from the upper end side in the drawing to the lower end side in the drawing. It has a cross section of shape.

The split-type ring pressing tool 7 is arranged so as to be fitted on the outer periphery of the cap-shaped mounting jig 6 and
There are a plurality (three in this example) of contacts 35 for pushing the shaft 3 into the circumferential groove 12 side of the shaft 11 in the axial direction. Each contact 35 is swingably mounted around a cylindrical pin (support shaft) 36, and is provided with a tip that can slide on the outer periphery of the cap-shaped mounting jig 6.
The split-type ring pressing tool 7 includes a plurality of springs 37 (contact urging means according to the present invention) for urging the respective tips of the plurality of contacts 35 in a direction in which they slide in contact with the outer periphery of the cap-shaped mounting jig 6. ) Is provided. Each pin 36
A first pressing tool holder 43 fixed to the connecting member 29 and provided so as to hang downward from the movable plate 4 in the figure.
Attached to.

The snap ring 1 in the initial state is attached to a second pressing member holder 44 fixed to the connecting member 29 and provided so as to hang downward from the movable plate 4 in the figure.
Adjustment bolts 45 are provided for finely adjusting the inner diameters of the tips of the plurality of contacts 35 in accordance with the inner diameter of 3. Therefore, the movable plate 4, the power source 5, the connecting member 2
9, by the rod 26, the pin 36 and the spring 37,
Each contact 35 of the split ring pressing tool 7 is connected to the shaft 11
And the split type ring pressing tool 7
Is moved to the circumferential groove 12 side in the axial direction of the shaft (downward in the figure, mounting direction of the snap ring 13).

The fall prevention mechanism 8 includes a cap-shaped mounting jig 6.
A plurality (three in this example) of first and second locking claws (first and second locking of the present invention) which are removably engaged with the first and second locking grooves 41 and 42 of the present invention. The first and second locking claws 51 and 52 are connected to first and second pins (corresponding to the first and second support shafts of the present invention) 53 and 54, respectively. First and second locking claw holders (corresponding to the first and second locking portion holders of the present invention) 61 and 62 that swingably hold around the center.
And the first and second springs (the first and second springs) for urging the first and second locking claws 51 and 52 in the direction in which the first and second locking grooves 41 and 42 of the cap-shaped mounting jig 6 are locked. 63, 64) and the base board 3 on which the first and second locking claw holders 61, 62 are mounted on the surface. It is composed of

The plurality of first and second locking claws 51 and 52 are
The cap-shaped mounting jig 6 is provided so as to be inserted into a gap 39 formed between two adjacent contacts 35 to be locked in the first and second locking grooves 41 and 42 on the outer periphery of the cap-shaped mounting jig 6. The mounting jig 6 can be held on the same axis as the shaft 11 in a suspended state. In this embodiment, a ring supply mechanism (parts feeder, pneumatic actuator, or the like) 9 for transferring the snap ring 13 is provided between the cap-shaped mounting jig 6 and the split ring pressing tool 7.

Next, a method of assembling the snap ring attaching apparatus according to the present embodiment will be briefly described with reference to FIGS.

First, as shown in FIG. 1, a snap ring 13 having a slit portion closed is supplied between a cap-shaped mounting jig 6 and a split ring pressing tool 7 by a ring supply mechanism 9. Later, when the power source 5 starts operating, the piston rod 30 is lowered, and the movable plate 4 and the connecting member 29 are also lowered downward (in the mounting direction of the snap ring 13). Then, each contact 35 of the split ring pressing tool 7 held by the first and second pressing tool holders 43 and 44 connected to the connecting member 29 also moves downward in the figure.

When each contact 35 of the split ring pressing tool 7 is lowered downward in the figure, the tension spring 23
The first and second locking claw holders 6 by the spring force of
The cap-like mounting jigs 6 locked by the plurality of first and second locking claws 51, 52 integrally provided on the base board 3 via the first and the 62 also move downward in the figure. Then, as shown in FIG. 3A, the cap-shaped mounting jig 6 is provided with its axial hole 3 in the outer periphery of the small diameter portion of the shaft 11 of the rotary electric machine 1.
3 is fitted, and the illustrated lower end of the cap-shaped mounting jig 6 is seated on the annular stepped portion of the shaft 11, so that the downward movement of the cap-shaped mounting jig 6 is stopped.

When the inner diameter of the snap ring 13 slides on the outer peripheral surface of the tapered portion 32 of the cap-shaped mounting jig 6, the inner diameter of the snap ring 13 is pushed outward in the radial direction, so that the cap-shaped mounting jig 6 is expanded.
When the contacts 35 of the split-type ring pressing tool 7 are further lowered downward as shown in FIG.
As shown in (b), the plurality of first locking claws 51 are pushed away by the snap ring 13 sliding on the outer peripheral surface of the body portion 31, and the first spring 63 is elastically deformed.
The first pin 53 is used as a fulcrum to rotate from the position shown by the two-dot chain line to the position shown by the solid line.

At this time, the cap-shaped mounting jig 6 is
Since the second locking groove 42 is locked by the locking claw 52, the cap-shaped mounting jig 6 does not fall off. Further, when each contact 35 of the split ring pressing tool 7 descends downward in the figure, as shown in FIG. When the second spring 64 is elastically deformed by the snap ring 13, the second spring 64 rotates from the position indicated by the two-dot chain line to the position indicated by the solid line in FIG. However, multiple first
Since the locking claw 51 is returned to the position where the first locking groove 41 is locked by the elastic deformation force of the first spring 63, the cap-shaped mounting jig 6 does not fall off.

FIG. 3D shows a state in which the stopper pin 46 stops at a position where the stopper pin 46 is in contact with the upper surface of the cap-like mounting jig 6 and the snap ring 13 is mounted in the circumferential groove 12 of the shaft 11 of the rotary electric machine 1. As shown, the cap-shaped mounting jig 6 is held by a plurality of first and second locking claws 51 and 52. When the power source 5 operates in the reverse direction and the piston rod 30 moves upward in the figure, the movable plate 4 and the connecting member 29 also move upward in the figure. Then, the first and second pressing tool holders 43 and 44 connected to the connecting member 29
The contacts 35 of the split ring pressing tool 7 held in the above-mentioned manner also rise upward in the figure (in the direction opposite to the mounting direction of the snap ring 13).

When the split-type ring pressing tool 7 rises upward in the figure, it is engaged with the flange 28 of the rod 26 that rises upward together with the movable plate 4 against the spring force of the tension spring 23. The completed base board 3 is also pulled upward in the figure. Then, a cap-like mounting jig locked to the plurality of first and second locking claws 51, 52 integrally provided on the base board 3 via the first and second locking claw holders 61, 62. The tool 6 is also returned to the initial position shown in FIG. Next, after replacing the rotating electric machine 1, the snap ring 13 having the slit portion closed is supplied again between the cap-shaped mounting jig 6 and the split-type ring pressing tool 7 by the ring supply mechanism 9, and The above operation is repeated.

[Effects of the Embodiment] As described above, the snap ring mounting device of the present embodiment has a conical shape of the tapered portion 32 of the cap-like mounting jig 6 due to the movement of the split ring pressing tool 7 in the snap ring mounting direction. The inner diameter of the snap ring 13 moved in the snap ring mounting direction along the trapezoidal outer peripheral surface and the circular outer peripheral surface of the body portion 31 expands (increases in diameter) to the outside in the radial direction, and the snap ring 13 becomes the rotating electric machine 1. Can be easily mounted in the circumferential groove 12 of the shaft 11. Accordingly, the snap ring 13 having the closed slit portion can be attached to the circumferential groove 12 of the shaft 11 without performing a complicated manual operation such as reversing the cap-shaped attachment jig 6. Can be reduced, and the assembling cost can be reduced.

In this embodiment, as shown in FIGS. 1 and 2, the first and second locking claws 51, 52 for holding the cap-shaped mounting jig 6 on the same axis as the shaft 11. In the upper and lower parts of the figure in the axial direction, and a total of 6
The two positions are set to prevent the cap-shaped mounting jig 6 from dropping from the tip of the shaft 11 and to prevent the cap-shaped mounting jig 6 from being inclined with respect to the axial direction of the shaft 11. This is for centering. this is,
This is very effective for a shape like the ring expanding member 71 shown in FIG. That is, the convex portion 72 that fits into the distal end hole 14 provided at the center of the shaft 11 is formed on the end surface of the ring enlarged member 71 on the shaft 11 side.

[Modification] In this embodiment, an example has been described in which the present invention is applied to a snap ring attaching device for attaching a snap ring 13 to a circumferential groove 12 of a shaft 11 of a rotating electric machine 1 such as a generator or an electric motor. However, the present invention may be applied to a snap ring attaching device that attaches a snap ring to a circumferential groove of a rotating shaft of a rotating body such as a power transmission device, a pump, a compressor, a fan, and a blower. Further, the present invention may be completely automated using a robot or a loader device.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an entire configuration of a snap ring attaching device (embodiment).

FIG. 2 is a sectional view taken along line AA of FIG. 1 (Example).

FIGS. 3A to 3D are explanatory views showing a snap ring mounting method (Example).

FIG. 4 is a sectional view showing a snap ring attaching device (second embodiment).

FIG. 5A is a front view showing a snap ring,
(B) is an explanatory view showing a conventional snap ring mounting method, and (c) is an explanatory view showing a conventional snap ring mounting method (prior art).

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 rotating electric machine (rotating body) 5 power source 6 cap-shaped mounting jig (ring expanding member) 7 split ring pressing tool 8 fall prevention mechanism (fall prevention means) 11 shaft (rotating shaft) 12 circumferential groove 13 snap ring 35 Contact 37 Spring (contact urging means) 41 First locking groove (first locked portion) 42 Second locking groove (second locked portion) 51 First locking claw (first locking) Part) 52 second locking claw (second locking part) 53 first pin (first supporting shaft) 54 second pin (second supporting shaft) 61 first locking claw holder (first locking part holder) 62 second locking claw holder (second locking part holder) 63 first spring (first locking part urging means) 64 second spring (second locking part urging means)

Claims (4)

[Claims] 1. A snap ring mounting device for expanding an inner diameter of a snap ring whose slit portion is closed outwardly in a radial direction of the snap rig and mounting the snap ring in a circumferential groove of a rotating shaft of a rotating body. A) a ring expanding member which is detachably attached to the tip end of the rotating shaft and expands the inner diameter of the snap ring fitted to the outer peripheral surface; and (b) along the outer peripheral surface of the ring expanding member. A split-type ring pressing device provided so as to be movable in the axial direction of the rotating shaft and capable of pressing the snap ring in the snap-ring mounting direction; and (c) the split-type ring pressing device, A snap ring mounting device comprising: a pressing tool driving unit that drives in a snap ring mounting direction. 2. The snap ring attaching device according to claim 1, wherein the ring expanding member is held on the same axis as the snap ring, and the ring expanding member is moved from a tip end of the rotating shaft. A snap ring mounting device comprising a fall prevention means for preventing falling off. 3. The snap ring mounting device according to claim 2, wherein said fall prevention means includes first and second locking portions for locking an outer peripheral surface of said ring enlarged-diameter member, and said first and second locking portions. First and second locking portion holders for holding the two locking portions so as to be swingable about the first and second support shafts, and the ring expanding member for connecting the first and second locking portions to each other. First and second locking portion biasing means for biasing the outer peripheral surface of the ring in a direction to lock the outer peripheral surface of the ring, and the ring expanding member is locked to the outer peripheral surface by the first and second locking portions. A first and a second locked portion. 4. The snap ring mounting device according to claim 1, wherein the split ring pressing member is configured to include a plurality of split ring pressing members that contact the snap ring on an outer peripheral surface of the ring enlarged member. A snap ring mounting device comprising: a contact; and a contact urging means for urging the contact in a direction in which the contact abuts on the snap ring on an outer peripheral surface of the ring enlarged member.