JPH0740076U - Retaining ring fitting - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a retaining ring wearing tool which enables E-shaped retaining ring and C-shaped retaining ring to be mounted with relatively small force. [Structure] In the snap ring attachment 1, a movable shaft 3 in which a snap ring holding portion 31 for holding an E-shaped snap ring 4 can be replaced.
Is supported inside the attachment main body 2 in which the thrust generating spring 5 and the hammer body 6 are arranged. In the trigger mechanism 9 formed between the hammer body 6 and the movable shaft 3, the engagement member 90 biased by the trigger spring 92 is engaged with the engagement step portion 32 of the movable shaft 3. When the attachment body 2 is pushed, the movable shaft 3 compresses the thrust generating spring 5 via the hammer body 6, and when the attachment body 2 is pushed further, the engaging member 90 is pushed by the guide surface 93. The spring 5 for thrust generation disengages from the movable shaft 3 so that the bottom portion 62 of the hammer body 6 is moved to the movable shaft 3.
Collide with.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a retaining ring mounting tool for mounting a retaining ring such as an E-shaped retaining ring or a C-shaped retaining ring on an object, and particularly, in a series of operations of pressing the mounting body toward the object. The present invention relates to a snap ring wearing device that instantly deforms a ring and attaches it to an object.

[0002]

[Problems to be solved by conventional techniques and devices]

 When assembling the mechanical system of various devices, a retaining ring such as an E-type retaining ring or a C-type retaining ring is often attached to the shaft part, etc. Therefore, in the mounting work, the retaining ring is used manually as the axis. It is attached by pressing it all at once and expanding the retaining ring. For this reason, a large amount of force is required to push the retaining ring wide, which is a pain for a weak person.

In view of the above problems, it is an object of the present invention to provide a retaining ring wearing device that can attach an E-shaped retaining ring, a C-shaped retaining ring and the like with comparatively small force.

[0004]

[Means and Actions for Solving the Problems]

 In order to solve the above problems, in the present invention, a retaining ring such as an E-type retaining ring or a C-type retaining ring is aligned with an object to be attached, and the retaining ring is pressed against the object. In the mounting device for mounting the snap ring, a movable shaft having a snap ring holding portion for holding the snap ring on the distal end side and a base end side of the movable shaft are supported so as to be movable in the axial direction, and the outer circumference is supported. A mounting body whose side is a grip portion is provided, and inside the mounting body, first, a thrust generation spring whose one end is supported on the proximal side in the mounting body and the thrust generation spring are provided. And a hammer body disposed on the other end side of the. Further, between the hammer body and the movable shaft, in the first step in which the mounting tool body starts to be pushed so as to press the retaining ring against the object, the hammer body and the movable shaft are urged by the trigger spring. Engagement members that move them in the direction of compressing them against the thrust-generating springs while they are still connected, and engagement members that have moved in the second process of further pressing the attachment body after the first process. Guide that causes the hammer body to collide with the movable shaft by the restoring force of the thrust generation spring by displacing the spring against the biasing force of the trigger spring and automatically releasing the connection between the movable shaft and the hammer body. And a trigger mechanism including a section. Further, after the completion of the second step, a return spring is provided which separates the movable shaft and the hammer body and automatically returns to a state in which they are connected to each other.

Therefore, when the mounting tool body is pushed so as to press the retaining ring held by the retaining ring holding portion against the object (first step), the hammer body and the movable shaft are coupled via the engaging member. The spring for generating a thrust is compressed by moving the inside of the main body of the wearing tool. From this state, when the attachment body is further pushed (second step), the engagement member is pushed by the guide portion and displaced against the biasing force of the trigger spring. As a result, the engagement state between the engaging member and the movable shaft is released, the hammer body is pushed by the thrust generating spring and collides with the movable shaft, and the retaining ring is momentarily expanded and attached to the object. Therefore, the force is accumulated in the thrust generating spring in the first process, the accumulated force is released at a stroke in the second process, the impact force is applied to the movable shaft, and the snap ring is momentarily deformed. , Does not require great power.

In the present invention, it is preferable that the movable shaft has a retaining ring holding portion which can be attached and detached.

[0007]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic view showing the overall structure of the retaining ring wearing device of the present embodiment, FIG. 2 (a) is a perspective view of the retaining ring holding portion, and FIG. 2 (b) is A of FIG. FIG. 6 is a vertical cross-sectional view of the retaining ring holding portion taken along the line A ′.

In FIG. 1, a retaining ring mounting tool 1 of this example has a mounting tool main body 2 made of resin, and a movable shaft 3 extends from a tip end side thereof. The wearing tool body 2 is designed in such a shape and size that it itself serves as a grip portion. Further, the attachment main body 2 is composed of a plurality of members connected by screwing and fixing so as to be easily assembled and disassembled.

The movable shaft 3 has a small diameter portion 30, an engaging step portion 32, a base end side shaft portion 33, a flange portion 34, a front end side shaft portion 35, and a stopper from the base end side toward the front end side. A wheel holding portion 31 is formed. The tip-side shaft portion 35 is in a state of penetrating the hole 21 formed on the tip side of the wearing tool body 2 with an inner diameter smaller than the outer diameter thereof, and by this hole 21, the movable shaft 3 is moved. It is possible to move in the axial direction while maintaining a posture that extends straight from. Moreover, the flange portion 34 prevents the movable shaft 3 from coming off from the fitting body 2 by hitting the distal end side inside the fitting body 2.

The retaining ring holding portion 31 has a flat plate shape machined from a single metal plate, and as shown in FIGS. 2A and 2B, the base end side 310 thereof is the tip of the tip side shaft portion 35. It is inserted into the groove 350 that opens in the surface and is fixed by the bolt 36. A notch 312 is formed in the retaining ring holding portion 31 from a substantially elliptical hole 311 formed at the center thereof to the tip edge, and the notch 312 allows the two gripping portions 313, 314 to be held. Is divided into Narrow portions 315a and 316a are formed in the grip portions 313 and 314 by the side cutouts 315 and 316, and the grip portions 313 and 314 are slightly deformed toward the outside by using these portions as springs. It is possible. Semicircular recesses 317 are formed on the tip edges of the grips 313 and 314 to match the outer peripheral shape of the E-shaped retaining ring 4 held therein, and the outer diameter of the E-shaped retaining ring 4 is formed on the inner peripheral edge thereof. A semicircular recess 318 having an inner diameter substantially the same as the dimension is formed as a step.

Inside the attachment main body 2, one end of a thrust generating spring 5 (coil spring) is fixed to the base end side, and a hammer body 6 is arranged on the other end side. The hammer body 6 has a cylindrical shape with a bottom portion 62, and its opening 61 is directed toward the tip end side of the mounting device main body 2. The base end side of the movable shaft 3 is inserted through the opening 61.

A spring bearing 7 is arranged on the tip side of the hammer body 6, and a guide hole having an inner diameter slightly larger than the outer diameter of the base end side shaft portion 33 of the movable shaft 3 is arranged at the center of the spring bearing 7. 7 1 are formed. The base end side shaft portion 33 of the movable shaft 3 penetrates through the guide hole 71, and the movable shaft 3 is also maintained by the guide hole 71 while keeping the posture in which the movable shaft 3 extends straight from the mounting body 2. It is movable in the axial direction. A restoring spring 8 (coil spring) having a restoring force weaker than that of the thrust generating spring 5 is arranged between the spring bearing 7 and the flange portion 34 of the movable shaft 3. It should be noted that the spring receiver 7 may be fixed in the wearing equipment main body 2 or may be movable in the wearing equipment main body 2. However, when it is movable, the wearing equipment main body 2 may be used. A stopper 22 is provided inside 2 to prevent it from moving toward the tip side.

Between the hammer body 6 and the movable shaft 3, a trigger mechanism 9 for applying a striking force to the movable shaft 3 is configured in conjunction with the operation of pressing the attachment body 2 and is shown in FIG. , Its configuration is schematically shown.

In the trigger mechanism 9, first, a disc-shaped or cylindrical engagement member 90 is mounted in a hole 63 penetrating the side surface of the hammer body 6, and its outer peripheral surface is the inner peripheral surface of the mounting tool body 2. Is in contact with. The inner diameter of the hole 94 of the engaging member 90 is designed to be larger than the outer diameter of the base end side shaft portion 33 of the movable shaft 3, and in the state shown in FIG. Only is inserted. The engaging member 90 is movable in the direction perpendicular to the axis L of the movable shaft 3, but is a coil spring arranged between the outer peripheral surface of the engaging member 90 and the inner peripheral surface of the hammer body 6. Since the trigger spring 92 such as a leaf spring or the like is biased toward the inner peripheral surface of the attachment main body 2, the center of the hole 94 of the engaging member 90 is lateral to the axis L of the movable shaft 3. It is in a position that is off. For this reason, the front end surface 91 of the engaging member 90 is hooked on the engaging step portion 32 of the movable shaft 3. On the other hand, on the inner peripheral surface of the wearing tool main body 2, a cam-shaped guide surface 93 is projected at a position slightly closer to the base end. Therefore, when the engaging member 90 relatively moves to the position where the guide surface 93 is formed, the engaging member 90 is pushed by the guide surface 93 and resists the biasing force of the trigger bar 92. The center of the hole 94 is displaced to a position overlapping the axis L of the movable shaft 3, and the front end surface 91 of the engaging member 90 is disengaged from the engaging step portion 32 of the movable shaft 3.

The operation of the trigger mechanism 9 configured as described above will be described below with reference to FIGS. 3 to 5 together with the method of using the retaining ring fitting 1.

First, as shown in FIG. 1, with the E-shaped retaining ring 4 held by the recesses 317 and 318 of the retaining ring holding portion 31, the inside of the E-shaped retaining ring 4 and the shaft 10 ( Align it with the object on which the retaining ring will be attached.

In this state, as shown in FIG. 3, the mounting body 2 is pushed toward the shaft 10 so that the E-shaped retaining ring 4 is pressed against the shaft 10 (first step). During this operation, since the front end surface 91 of the engaging member 90 is caught on the step portion 32 of the movable shaft 3, the hammer body 6 and the movable shaft 3 remain connected with each other via the engaging member 90. It moves relative to the thrust generating spring 5 in the direction of compression. However, with this operation alone, the engaging member 90 has not moved to the position where the guide surface 93 is formed. Further, the E-shaped retaining ring 4 is not yet largely deformed, and the applied force is only stored in the thrust generating spring 5.

From this state to the state shown in FIG. 4, the mounting device main body 2 is further pushed toward the shaft 10 (second process). By this operation, the engaging member 90 relatively moves to the position where the guide surface 93 is formed and rides on the guide surface 93. Therefore, the engaging member 90 is pushed by the guide surface 93 and displaced against the biasing force of the trigger spring 92, and the center of the hole 94 thereof overlaps the axis L of the movable shaft 3. As a result, the front end surface 91 of the engaging member 90 and the step portion 32 of the movable shaft 3 are disengaged, and the connection between the hammer body 6 and the movable shaft 3 is released.

Therefore, the thrust generating spring 5 is released from the compressed state, and the restoring force thereof propels the hammer body 6 from the position shown in FIG. 4 to the position shown in FIG. It collides with the rear end surface of the movable shaft 3. In response to this striking force, the movable shaft 3 pushes the E-shaped retaining ring 4 toward the shaft 10 at once. Therefore, the E-shaped retaining ring 4 is momentarily expanded while being sandwiched between the grip portions 313 and 314, and is attached to the shaft 10.

Thereafter, the return spring 8 separates the hammer body 6 and the movable shaft 3 from each other, so that the engaging stepped portion 32 of the movable shaft 3 is returned to the position of the front end surface 91 of the engaging member 90. Here, since the engaging member 90 is biased by the trigger spring 92, the engaging member 90 is displaced, and the front end face 91 is caught by the engaging step portion 32 of the movable shaft 3, and the state shown in FIG. Return to.

As described above, in the retaining ring mounting tool 1 of this example, a force is stored in the thrust generating spring 5 by a series of operations of pushing the mounting body 2 such that the E-shaped retaining ring 4 is pressed against the shaft 10. After that, the hammer body 6 is allowed to collide with the movable shaft 3 by releasing it all at once. For this reason, the movable shaft 3 receives the impact force and instantaneously deforms the E-shaped retaining ring 4 to mount it on the shaft 10. Therefore, a large force is not required to mount the E-shaped retaining ring 4 on the shaft 10, which is convenient for a weak worker. In addition, after the E-shaped retaining ring 4 is mounted, the standby state for mounting the next E-shaped retaining ring 4 is automatically returned to, so that the work efficiency is improved.

Further, since the retaining ring holding portion 31 is attachable to and detachable from the movable shaft 3, when attaching a retaining ring having a different size or shape, only the retaining ring holding portion 31 needs to be replaced. Therefore, it is not necessary to prepare several snap ring fittings.

A movable cap 3 is provided on the movable shaft 3 by providing a screw cap or the like on the rear end surface of the attachment main body 2 and adjusting the expansion / contraction state of the thrust generating spring 5 in advance according to the screwing depth. You can also adjust the added force.

[0025]

[Effect of device]

 As described above, in the snap ring mounting device according to the present invention, the force is stored in the thrust generating spring by a series of operations of pushing the mounting device body in the direction in which the snap ring held by the movable shaft is pressed against the object, By automatically releasing it, the hammer body applies a force to the movable shaft. Therefore, according to the present invention, the worker can attach the retaining ring without applying a large force enough to deform the retaining ring all at once, which is convenient for a weak person. In addition, after attaching the retaining ring, it automatically returns to the standby state for attaching the next retaining ring, improving work efficiency.

Also, when the retaining ring holding portion is made replaceable, the main body itself can be used as it is even when attaching retaining rings of different sizes and shapes, which is convenient.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an overall configuration of a retaining ring wearing tool according to an embodiment of the present invention.

2A is a perspective view showing a configuration of a retaining ring holding portion of the retaining ring attachment shown in FIG. 1, and FIG. 2B is a sectional view taken along the line AA ′ in FIG.

FIG. 3 is an explanatory view showing a first step of pressing the mounting device main body and compressing the thrust generating spring in the snap ring mounting device shown in FIG. 1.

FIG. 4 is an explanatory diagram showing a second process of further pushing the mounting device main body from the state shown in FIG. 3 to release the compressed state of the thrust generating spring.

5 is an explanatory view showing a state in which a hammering force is applied to the movable shaft via a hammer body from the state shown in FIG.

[Explanation of symbols]

 1 ... Retaining ring mounting tool 2 ... Mounting tool body 3 ... Movable shaft 4 ... E-shaped retaining ring 5 ... Thrust generating spring 6 ... Hammer body 8 ... Return spring 9 ... Trigger mechanism 31 ... Retaining ring holding part 32 ... Engaging step part 90 ... Engaging member 92 ... Trigger spring 93 ... Guide surface

Claims (2)

[Scope of utility model registration request] 1. A snap ring fitting for pressing a snap ring onto an object in a state where the snap ring such as an E snap ring or a C snap ring is aligned with an object to be fitted. There is a movable shaft equipped with a retaining ring holding part for retaining the retaining ring on the distal end side, and the base end side of this movable shaft is supported so as to be movable in the axial direction, and the outer peripheral side is the grip part. A tool body, and inside the body of the wearing tool, a thrust generating spring whose one end is supported on the base end side in the body of the wearing tool, and the other end side of the thrust generating spring. And a hammer body, and between the hammer body and the movable shaft, in the first step of starting to push the attachment body so as to push the retaining ring to the object, the hammer body is urged by the trigger spring. The thrust is generated by connecting them to the movable shaft. An engagement member that moves relatively in the direction of compression with respect to the spring, and the engagement that has moved together with the movable shaft and the hammer body in a second step of pressing the mounting device body subsequent to the first step. By displacing the member against the biasing force of the trigger spring to automatically release the connection between the movable shaft and the hammer body, the hammer body is moved by the restoring force of the thrust generating spring. A trigger mechanism having a guide portion that collides with the shaft; and a return spring that separates the movable shaft and the hammer body after the completion of the second step and automatically returns to a state in which they are coupled to each other. A snap ring fitting that is characterized in that 2. The snap ring mounting device according to claim 1, wherein the snap ring holding portion is attachable to and detachable from the movable shaft.