JPS6322069Y2 - - Google Patents

Description

[Detailed description of the invention] E-type retaining ring 21, U-type retaining ring 28, and crescent-type retaining ring 27 have elasticity in the circumferential direction in order to restrict the axial movement of the shaft 25 of recently manufactured equipment.
etc. are press-fitted and attached to a groove 26 of a certain standard provided on the shaft 25, but the tool to remove these is a trowel-shaped extraction tool that utilizes the gap 24 between the outer circumference of the shaft and the retaining ring. Ordinary tapered pliers, etc. were used to remove the pin or the tip of a screwdriver by inserting it into the gap 24, but with these methods, if the position where it is installed is narrow,
In particular, when the gap 24 is hardly exposed from the outer periphery of the shaft, as in the case of a crescent-type retaining ring, the work is difficult and almost impossible. Also, a tool is being considered in which the retaining ring is inserted and removed at the tip of a straight shaft, but if the retaining ring is attached to the center of the shaft instead of the tip, it will not be possible to remove the retaining ring directly. The tip of the mold was unable to reach the retaining ring, making it impossible to work.

This invention eliminates all of the above-mentioned drawbacks, and allows any type of retaining ring to be removed easily, reliably, and quickly without damaging surrounding equipment, no matter what type of retaining ring is installed in any position. This invention relates to the structure of a tool that can be installed.

Hereinafter, embodiments for attaching and detaching the E-type retaining ring 21 of the present invention will be described based on the drawings. Figure 2 a and b
As shown in the figure, a grip part 2 and a pair of gripping parts 3 are arranged around the connecting part 1, and each side 4 and 5 of the gripping parts that come into close contact with each other has a thickness approximately equal to the thickness 6 of the retaining ring 21 used. The tip of the gripper is bent inward at an arbitrary angle with the side surface with the difference in thickness outside, and the side 5 of the gripper with the wider thickness is the same as the shaft 25 where a retaining ring is used. A semicircular groove 7 with the same diameter as the gripping part side 4 with a narrow thickness and a triangular groove 8 with the same center as the semicircular groove 7 is cut across the respective widths.

When removing the retaining ring 21 attached to the tip of the shaft 25 as shown in FIGS. 3a and 3b, the bent portion of the original gripping portion is used. First, place the triangular groove 8 of the gripper side 4 on the outer periphery of the shaft on the center line 9 of the upper part of the retaining ring, and grip the grip part 2 with the gripper side 4 lightly pressed tightly against the retainer ring 21.
The edges 10 on both sides of the semicircular groove 7 contact the lower edge 23 of the opening of the retaining ring 21 . In this state, as shown in FIG. 2b, the thickness of the side 5 of the gripping part is larger than the side 4 of the gripping part, which is almost equal to the thickness 6 of the retaining ring, so when further gripping force is applied, the retaining ring 21 and the shaft 25 are separated as shown by the arrow. As a result, the retaining ring 21 gradually comes out of the shaft groove 26 into which it is press-fitted, and the retaining ring 21 is inserted into the semicircular groove 7 under the shaft 25 as shown in FIG. 3c. The semicircular portions are fitted, and the retaining ring 21 is completely removed from the shaft 25. By adjusting the opening of the gripper part 3 by operating the grip part 2, the retaining ring 21 can be stopped in the middle of the shaft groove 24 to prevent it from falling off.

Next, if the retaining ring 21 is attached to the middle part of the shaft 25, it can be removed using a grip with a curved tip, but as shown in Fig. 4, it can be removed using the sides 4 and 5 at the center of the grip. I will do it. That is, the triangular groove 8 of the side gripper side 4 with a difference in thickness is placed on the outer periphery of the shaft 25 on the center line 9 of the upper part of the retaining ring, and when the grip part 2 is closed, half of the gripper side 5 The edges 10 on both sides of the circular groove push the lower edge 23 of the retaining ring opening and the shaft groove 2
Remove the retaining ring 21 press-fitted into the ring 6.

To attach the retaining ring 21 to the shaft 25, contrary to the above, as shown in FIGS.
When applying force in the direction of the scissor arrow by placing the edges 10 on both sides of the semicircular groove on the upper part 22 of the retaining ring and the triangular groove 8 on the side 4 of the gripping part on the shaft 25, the retaining ring 21 will not fall off and will remain as shown in Figure 5c. It is installed like this.

As mentioned above, the Yatsutoko connecting part 1 and the gripping part 3 are not one body, but as shown in FIG. 1 and a structure that can be fixed with screws or other means, the retaining ring 21 of the appropriate size can be attached and detached by replacing the gripping sides of the semicircular groove 7 and the triangular groove 8 with different dimensions. It is possible to work with different dimensions with just one Yatsutoko main body.

As described above, in the present invention, the pair of parts and the gripping parts sides 4 and 5 are used to form an E-shaped retaining ring, a U-shaped retaining ring,
When removing a crescent-type retaining ring, etc., apply force to the attached retaining ring and shaft from the direction in which they separate from each other, and when installing, apply force from the direction in which they fit into each other using a retaining ring attachment/removal tool. Even if the retaining ring is in a narrow space, it can be removed and installed reliably, easily, and quickly without scattering or falling off during operation, and without damaging surrounding equipment. With the replaceable type, it is easy to attach and detach retaining rings for shafts of different sizes, and it is lightweight, convenient, and economical to carry.

[Brief explanation of the drawing]

Figure 1 a shows the E-type retaining ring attached to the shaft, b
2 is a crescent-type retaining ring, c is a U-shaped retaining ring, FIG. 2a is a perspective view of the retaining ring removal tool according to the present invention, and b
An enlarged view of the grip part, Figures 3a, b, and c are operation diagrams for removing the retaining ring at the bent portion of the grip part, Figures 4 a and b are operation diagrams for the central part of the grip part, and Figures 5 a, b and c are views of the retaining ring press-in operation, and FIG. 6 is a perspective view of the retaining ring removal/removal tool according to the present invention, in which the gripping portion is freely replaceable.

Claims (1)

[Claims for Utility Model Registration] 1. A difference in the thickness of the inner surface of the pair of gripping parts 3 that are in close contact with each other is approximately equal to the thickness 6 of the retaining ring used, and the tip of the gripping part is set at an arbitrary angle. , the sides with different thicknesses are turned outside and bent inward, and a retaining ring is used on the gripper side 5, which is the same as the shaft 25, at two positions, the central part and the bent end of the gripper. This retaining ring attachment/detachment tool has a semicircular groove 7 with a diameter of 100 mm, and a triangular groove 8 with the same center as the semicircular groove 7 on the side 4 of the gripping part with a narrow thickness and a triangular groove 8 across the thickness. 2. The retaining ring attachment/detachment tool according to claim 1, wherein the pair of gripping parts are replaceable.