JP2006088262A - Removal tool for c-shaped retaining ring - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a removal tool for a C-shaped retaining ring, having both a function of a removal tool for a retaining ring for a shaft and a function of a removal tool for a retaining ring for a hole, smoothly removing the C-shaped retaining ring without deformation and slip-off, having no limitation on the size of the retaining ring, and removing the C-shaped retaining rings of all sizes with one tool. <P>SOLUTION: This removal tool for the C-shaped retaining ring removes the C-shaped retaining ring 4 having a pair of locking holes at the tip. The removal tool includes a locking part 1 having a pair of locking pins 1a at the tip of the locking part body 6; and a pair of holding parts 2 connected to each other by a fulcrum shaft 3 and a holding part fixing pin 5 at the locking part 1. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a C-type retaining ring detaching tool for easily detaching while expanding a C-shaped retaining ring on an outer peripheral portion of a shaft-like workpiece.

Conventionally, the C-type retaining ring is attached to the outer periphery of the shaft-like workpiece while being expanded, and the E-type retaining ring can be easily and without deforming or scratching the shaft body, E-type retaining ring, or other parts. An E-type retaining ring mounting device and a jig that can be securely press-fitted have been proposed (see, for example, Patent Documents 1 and 2).
Patent Document 1 discloses a jig in which a C-type retaining ring is mounted from the axial direction on the outer periphery of a shaft-shaped workpiece, and the jig is a mounting guide shaft that is positioned in contact with a short portion of the shaft-shaped workpiece; An outer cylinder body is provided that can move back and forth in the axial direction along the outer periphery of the mounting guide shaft.
In addition, an insertion portion into which the C-type retaining ring is fitted on the mounting guide shaft, a diameter-increasing taper portion that expands the inner diameter of the C-type retaining ring, and a diameter slightly larger than the inner diameter of the C-type retaining ring are connected to the diameter-increasing taper portion. A large diameter portion is provided, the end of the large diameter portion can be brought into contact with the end of the shaft-like workpiece, and the C-type retaining ring fitted from the insertion portion is pressed against the outer cylinder to increase the diameter of the taper The part is pushed into the mounting part of the shaft-like workpiece through the large diameter part.
Patent Document 2 discloses an E-type retaining ring mounting device that can easily and surely press-fit the E-type retaining ring without deforming or scratching the shaft body, the E-type retaining ring, or other parts. .
In this disclosure, a retaining ring supply means for holding a plurality of E-type retaining rings A aligned in substantially the same direction, a slider, and one end of the E-type retaining ring at the periphery of the slider. An elastic holding means having two arc-shaped elastic claws to be elastically held, a shaft body holding means for holding the shaft body in a loosely fitted state, and a slider driving means are provided.
FIG. 12 is a schematic view showing a conventional ring setter. FIG. 13 is a schematic view showing distortion of a C-type retaining ring in a conventional ring setter. FIG. 14 is a schematic view showing a state where the C-type retaining ring is set on a work piece in a distorted state.
As shown in FIGS. 12 to 14, a ring setter 10 is conventionally known as a tool for attaching and detaching a C-type retaining ring for a shaft. The ring setter 10 is inserted into holes 11a provided at both ends of the C-type retaining ring 11 to expand the opening between the holes 11a.
However, at this time, as shown in FIG. 13, the C-type retaining ring 11 is distorted (11b) in the thickness direction, and as a result, a set error to the workpiece 12 occurs. Moreover, it is easy to fall off the ring setter 10.
JP-A-11-300645 JP 2001-212772 A

In order to solve such a problem, Patent Document 1 is known. However, since a positioning mechanism with a tool must be provided on an axial workpiece, the workpiece shape is limited. Moreover, it is a tool only of mounting | wearing, A several tool is required for every size.
In view of the above situation, the object of the present invention is to have both the function of the attaching / detaching tool for the shaft retaining ring and the function of the retaining ring attaching / detaching tool for the hole, so that the C-type retaining ring can be attached and detached smoothly without being deformed and dropped. It is another object of the present invention to provide a C-type retaining ring attaching / detaching tool that can be attached to and detached from all sizes of C-type retaining rings with one tool without any restriction on the retaining ring size.

In order to solve the above-mentioned problems, the invention according to claim 1 is a C-type retaining ring detachment tool for detaching a C-type retaining ring having a retaining hole at each of both end portions, and a retaining portion at the distal end. A latching means in which two provided locking part main bodies are rotatably connected by a fulcrum shaft, and a holding means in which two holding part main bodies having a holding part at the tip are rotatably connected by the fulcrum shaft. The two locking portion main bodies are connected to the two holding portion main bodies by a holding portion fixing pin, respectively, and when the locking portion main body and the holding portion main body are brought close to each other, The two locking portions are separated from each other, and the two holding portions are close to each other.
According to a second aspect of the present invention, in the first aspect of the present invention, the two locking portion main bodies are connected in a shape << around the fulcrum shaft.
According to a third aspect of the present invention, in the first aspect, the two holding portion main bodies are connected in an X shape around the fulcrum shaft.
According to a fourth aspect of the present invention, there is provided the C-type retaining ring attaching / detaching tool according to the third aspect, wherein the holding portion has a holding claw.

  According to the present invention, the C-type retaining ring attaching / detaching tool is a tool having both the function of the attaching / detaching tool for the shaft retaining ring and the function of the retaining ring attaching / detaching tool for the hole, and a locking pin for expanding the C-type retaining ring; As the C-type retaining ring expands, the fixing portion narrows and the C-type retaining ring can be fixed by the fixing portion. Therefore, the C-type retaining ring can be accurately mounted without being deformed. Further, there is no restriction on the size of the C-type retaining ring, and all sizes of the C-type retaining ring can be attached and detached with one tool.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a side view showing a C-type retaining ring detaching tool according to the present invention. FIG. 2 is a top view of the C-type retaining ring detaching tool of FIG.
1 and 2, the C-type retaining ring detaching tool according to the present invention is provided with a holding claw 2a at the tip on a locking portion body 6 having a locking portion 1 with a locking pin 1a at the tip. The holding part main body 7 having the part 2 is arranged so as to rotate around the fulcrum shaft 3 and is connected to the holding part fixing pin 5.
In other words, the detachable tool is composed of two locking portion main bodies 6 having the locking portion 1 at the tip end, locking means a including the fulcrum shaft 3 and the like, and two holding portions having the holding portion 2 at the tip end. And a holding means (a) comprising the main body 7 and the fulcrum shaft 3 or the like.
In this case, the two locking portion main bodies 6 constituting the locking means A are connected so as to have a general outline << shape about the fulcrum shaft 3 as a whole. Similarly, the holding portion main body 7 constituting the holding means (a) is connected so as to have a substantially X shape (cross shape) as a whole with the fulcrum shaft 3 as the center.
In other words, the fulcrum shaft 3 is a shaft that penetrates the locking portion main body 6 and the holding portion main body 7, and the two locking portion main bodies 6 having the locking portions 1 at the distal ends are the locking means arms shown in FIG. Therefore, when the interval between the two locking portions 1 is reduced by gripping the two locking portion main bodies 6 with the palm, the interval between the two locking portions 1 is increased. On the other hand, as shown in the plan view of the holding means (a) in FIG. 7, the two holding part bodies 7 having the holding part 2 at the tip are connected to the locking part body 6 by the fixing pins 5, respectively. Thus, the fulcrum shaft 3 is crossed and connected in an X shape (in a hook shape). For this reason, if it grasps in the direction where the space | interval of the two holding | maintenance part main bodies 7 narrows, each holding | maintenance part 2 of a front end will rotate in the direction which approaches.
FIG. 3 is an enlarged perspective view of the holding portion when the detachable tool is set on the C-type retaining ring and the C-type retaining ring is expanded. FIG. 4 is a positional relationship diagram of the holding portion and the locking pin when the detachable tool is set on the C-type retaining ring. FIG. 5 is a diagram showing the positional relationship between the holding portion and the locking pin when the C-type retaining ring is expanded.
3 to 5, the locking pins 1a of the locking portions 1 are inserted into the locking holes 4a of the C-type retaining ring 4, and the tips of the holding portions 2 are aligned in FIG. In FIG. 4, the locking pin 1a of each locking part 1 inserted into each locking hole 4a of the C-type retaining ring 4 opens the space between both ends of the retaining ring 4 provided with the locking hole 4a. I'm starting. Symbols A and B in FIG. 3 indicate the direction of deformation or dropping of the C-type retaining ring 4.

In FIG. 5, the C-type retaining ring 4 is separated by the retaining pin 1 a of the retaining portion 1 in which the retaining hole 4 a of the C-shaped retaining ring 4 is inserted, and the C-shaped retaining ring 4 is allowed to be attached to a work (not shown). Is held in a state where the ends of the holding portion 2 are aligned.
When the locking pin 1a is inserted into the locking hole 4a of the C-type retaining ring 4 and the locking portion main body 6 is gripped, the locking pin 1a spreads and the C-shaped retaining ring 4 is opened. At the same time that the locking pin 1a spreads, the holding portion 2 narrows, and the C-type retaining ring 4 fits between the holding claw 2a.
The C-type retaining ring 4 accommodated in the state of FIG. 5 can be attached to the workpiece (not shown) smoothly without the deformation of the retaining claw 2a and the locking pin 1a. Further, when the C-type retaining ring 4 is removed from the workpiece, the holding claw 2a and the locking pin 1a serve as a guide and can be easily removed without causing deformation and dropping.
FIG. 6 is a schematic view showing a single unit of the locking means a of the detachable tool shown in FIGS. FIG. 7 is a schematic view showing a single unit of the holding means A of the detachable tool shown in FIGS.
On the two locking portion main bodies 6 constituting the locking means in FIG. 6, the two holding portion main bodies 7 constituting the holding means are arranged so as to rotate around the fulcrum shaft 3.
6 and 7 only show a state in which the respective parts constituting the detachable tool in FIGS. 1 and 2 are separated, the same parts as those in FIGS. 1 and 2 are denoted by the same reference numerals. Each explanation is omitted.

FIG. 8 is a partial schematic view showing a first embodiment of a holding claw of a holding portion in a C-type retaining ring detaching tool according to the present invention. FIG. 9 is a partial schematic view showing a second embodiment of the holding claw of the holding portion in the C-type retaining ring detaching tool according to the present invention.
The holding claw 2 a of the holding portion 2 in the C-type retaining ring removal tool in FIG. 8 is configured to hold one side surface of both tip portions of the C-type retaining ring 4. The holding claws 2 a of the holding portion 2 in the C-type retaining ring removal tool in FIG. 9 are configured to hold both side surfaces of the C-type retaining ring 4.
FIG. 10 is a partial schematic view showing a third embodiment of a holding claw of a holding portion in a C-type retaining ring detaching tool according to the present invention. FIG. 11 is a schematic perspective view showing a state in which the C-type retaining ring is held by the holding claws of FIG.
10 and 11, the holding claws 2 a of the holding portion 2 in the C-type retaining ring detaching tool are configured to wrap and hold both side surfaces of both end portions of the C-type retaining ring 4 from the side.
According to the present invention, the locking pin 1a has a locking portion when the locking portion main body 6 is squeezed because the locking portion 1 and the locking portion main body 6 which is a grip are formed in a shape. 1 expands, and the retaining ring can be expanded around the fulcrum shaft 3.
Further, the holding part 2 is formed in an X shape with the holding part 2 and the holding part main body 7 centered on the fulcrum shaft 3, and when the holding part main body 7 approaches, the holding part 2 approaches, and the holding claw 2a It is possible to prevent the C-type retaining ring 4 from being deformed and dropped in the directions A and B in FIG.

It is a side view which shows the removal tool of the C type retaining ring by this invention. It is a top view of the removal tool of the C type retaining ring of FIG. It is an expansion perspective view of a holding part when a detaching tool is set on a C-type retaining ring and the C-type retaining ring is expanded. It is a positional relationship figure of a holding | maintenance part and a locking pin when a removal tool is set to a C type retaining ring. It is a positional relationship figure of a holding | maintenance part and a locking pin when a C-type retaining ring is spread. It is the schematic which shows the single-piece | unit of the latching | locking part of the removal tool shown in FIG.1 and FIG.2. It is the schematic which shows the single body of the holding | maintenance part of the removal tool shown in FIG.1 and FIG.2. It is the partial schematic diagram which shows 1st Embodiment of the holding | maintenance nail | claw of the holding | maintenance part in the removal tool of the C-type retaining ring by this invention. It is the partial schematic which shows 2nd Embodiment of the holding | maintenance nail | claw of the holding | maintenance part in the removal tool of the C-type retaining ring by this invention. It is the partial schematic which shows 3rd Embodiment of the holding | maintenance nail | claw of the holding | maintenance part in the removal tool of the C-type retaining ring by this invention. It is a schematic perspective view which shows the state which hold | maintained the C type retaining ring with the holding nail | claw of FIG. It is the schematic which shows the conventional ring setter. It is the schematic which shows the distortion of the C type retaining ring in the conventional ring setter. It is the schematic which shows the state set to the workpiece | work in the state in which the C type retaining ring was distorted.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Locking part 1a Locking pin 2 Holding part 2a Holding claw 3 Support shaft 4 C-type retaining ring 4a C-type retaining ring locking hole 5 Holding part fixing pin 6 Locking part main body (grip)
7 Holder body

Claims (4)

In a C-type retaining ring detaching tool for detaching a C-type retaining ring having a locking hole at each of both ends,
A locking means in which two locking portion main bodies having a locking portion at the tip are rotatably connected by a fulcrum shaft, and two holding portion main bodies having a holding portion at the tip are rotated by the fulcrum shaft. Holding means connected freely,
The two locking portion main bodies are connected to the two holding portion main bodies by a holding portion fixing pin, respectively. When the locking portion main body and the holding portion main body are brought close to each other, the two locking portions are A tool for attaching and detaching a C-type retaining ring, wherein the two holding parts approach each other.   The C-type retaining ring detaching tool according to claim 1, wherein the two locking portion main bodies are connected in a shape << around the fulcrum shaft.   The C-type retaining ring detaching tool according to claim 1, wherein the two holding portion main bodies are connected in an X shape around the fulcrum shaft.   The C-type retaining ring detaching tool according to claim 3, wherein the holding portion has a holding claw.

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