JPH0624828U - Automatic snap ring mounting device - Google Patents

Abstract

(57) [Summary] [Object] An object of the present invention is to provide an automatic mounting device capable of automatically mounting a snap ring in a ring groove of a shaft-shaped work. [Structure] In the automatic snap ring mounting device according to the present invention, the set jig is moved relative to the uppermost snap ring on the supply jig, and the tip split collet of the set jig is pushed inside the snap ring. It is characterized in that the snap ring is locked to the outer peripheral surface of the split collet portion by its elastic force. Further, the snap ring automatic mounting device according to the present invention is configured such that the set jig is relatively moved toward the end face of the shaft-like work, and the tip of the set pin is brought into contact with the end face of the shaft-like work to split the collet part of the set jig. After expanding the snap ring to the outer diameter dimension of the shaft-like work by expanding it at the tip enlarged part of the set pin, move the pushing jig on the outer circumference of the split collet to move the expansion snap ring to the shaft-like work. It is characterized in that the distal end portion is pushed in and attached.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device for automatically mounting a snap ring in a ring groove of a shaft-shaped work.

[0002]

[Prior art]

 In various machines, a snap ring, for example, a C-shaped snap ring, is often used to fix and position an assembled component to a shaft component. Conventionally, when attaching a snap ring to a shaft component, an operator has used snap ring pliers to insert the snap ring into the ring groove of the shaft component.

[0003]

[Problems to be solved by the device]

 However, in the conventional mounting method, since the mounting is done by hand and the snap rings are mounted one by one, there is a problem that the work is very complicated and the working time becomes long. In view of such problems, it is an object of the present invention to provide a device that can automatically attach a snap ring to a shaft component. By the way, when the snap ring mounting is automated, the movable part of the device can be held linearly by moving it, and the snap ring can be mounted by moving it in the axial direction of the shaft part. The snap ring can be held and attached only by the linear movement of the, and the configuration of the device can be simplified. However, it is necessary to expand the snap ring to a size larger than the outer diameter of the shaft part in order to construct the retaining mechanism of the snap ring and to fit it in the ring groove of the outer peripheral surface of the shaft part. The problem is how to construct the system.

[0004]

[Means for Solving the Problems]

 Therefore, the snap ring automatic mounting apparatus according to the present invention includes a set jig in which a tubular split collet portion is formed at the tip, and a snap ring is elastically locked to the outer circumferential surface of the split collet portion, and a plurality of snap ring portions. And stacking them, and moving the snap ring so that the top snap ring is at the specified supply position, and the above set jig relative to the top snap ring, The split collet portion is pushed into the inside of the snap ring, and a locking drive means for locking the snap ring to the outer circumferential surface of the split collet portion by elastic force is provided. ”

In addition, the snap ring automatic mounting device according to the present invention includes a set jig in which a tubular split collet portion is formed at a tip end, and a snap ring is elastically locked to an outer peripheral surface of the split collet portion, A set pin that is slidably accommodated in the split collet portion, has an enlarged portion formed at its tip end for expanding the split collet portion, and the enlarged portion is projected from the split collet portion by the biasing force of the spring member. A pushing jig that is placed on the outer circumference of the split collet and that pushes the expanded snap ring onto the axial work by mounting it in the axial direction, and the set jig are moved relative to the end face of the axial work, and then set. The tip of the pin is brought into contact with the end face of the shaft-like work, and the split collet part is expanded at the enlarged part of the tip of the set pin. Zhang, and a mounting drive means for pushing attached to the distal end of the shaft-like workpiece extensions snap ring to move the pushing jig "It is summarized as.

[0006]

[Action]

 When the locking drive means moves the tip collet part of the set jig relative to the supply jig and presses it inside one snap ring, the snap ring is elastically attached to the collet part of the set jig. Be locked. On the other hand, in the supply jig, the snap ring is moved to set the next one snap ring to be locked at a predetermined supply position.

When one snap ring is locked to the collet part at the tip of the setting jig, the mounting jig moves the setting jig together with the setting pin relative to the tip of the shaft-shaped work, and When the tip comes into contact with the end face of the shaft-like work, only the tip split collet moves to the end face of the shaft-like work and is expanded by the tip pin enlarged part of the set pin. Since it is expanded to a size larger than the diameter, when the pushing jig is moved toward the axial work in this state, the expansion snap ring is pushed in the axial direction and mounted on the axial work. When the installation is completed, the pushing jig and the setting jig are returned to their original positions, but the elastic force of the snap ring does not act on the tip split collet of the setting jig. At the same time as the return, the set pin projects from the tip of the split collet due to its urging force, and thus returns to the original state.

[0008]

【Example】

 Hereinafter, the present invention will be described in detail based on specific examples shown in the drawings. 1 to 3 show an automatic mounting device for a snap ring according to an embodiment of the present invention. In the figure, a guide bar 2 is horizontally fixed between a pair of columns 1, and a movable frame 3 is slidably attached to the guide bar 2. A front-rear moving cylinder 4 is fixed to one of the columns 1, and the movable frame 3 is connected to the tip of a piston rod 40 of the front-rear moving cylinder 4, and the movable frame 3 locks the snap ring S. It is adapted to reciprocate between the position A and the mounting position B.

A vertically moving cylinder 5 is fixed to the movable frame 3, and a cylindrical setting jig 6 is fitted to the tip end portion of a piston rod 50 of the vertically moving cylinder 5 (see FIG. 1 (b)). ), A small-diameter cylindrical split collet portion 60, which is divided into three, is formed at the tip of the set jig 6, as shown in FIG. A step portion 61 that locks the nap ring S is formed. The set pin 7 is slidably accommodated in the split collet portion 60, an enlarged portion 70 is formed at the front end portion of the set pin 7, and a disc-shaped retaining portion 71 is formed at the rear end thereof. The pin 7 is prevented from coming off from the split collet portion 60. A spring member 8 is provided between the retaining portion 71 and the tip of the piston rod 50 of the vertically moving cylinder 5, and the enlarging portion 70 of the set pin 7 is separated from the split collet portion 60 by the urging force of the spring member 8. It is projected.

Further, a pair of guide shafts 9 are vertically extended and supported by the movable frame 3, and a flange portion of a pushing jig 10 is fixed to a tip of the guide shaft 9, and the pushing jig 10 is fixed. An insertion hole 100 is formed in the center of the above, and the split collet portion 60 is inserted with a predetermined gap. Further, a pushing cylinder 11 is supported on the movable frame 3, and the pushing shaft 11 is configured to vertically move the guide shaft 9.

A turntable 12 is arranged near the locking position A on the floor surface, and a plurality of mounts 120 are provided on the turntable 12 at predetermined intervals on the circumference. A plurality of snap rings S are stacked on the mounting table 120 along its axis (not shown), and the mounting table 120 is vertically movable along the axis. Further, the push-up cylinder 13 is mounted on the locking position A on the floor surface, and the piston rod 130 of the push-up cylinder 13 is fixed with a pair of push-up rods 131. The turntable 12 is inserted through a through hole (not shown) to push up the mounting table 120, so that one snap ring S to be mounted comes to a predetermined supply height. On the other hand, at the mounting position B on the floor surface, a mechanism for holding the shaft-shaped work W upright, for example, a conveyor mechanism 14 for locking and transporting the upright shaft-shaped work W is arranged. The snap ring S has a substantially C-shape as shown in FIG. 1 (d).

As described above, the turntable 12 and the push-up cylinder 13 mount a plurality of snap rings S on top of each other, and a plurality of snap rings S to be mounted are placed at a predetermined supply position. A supply jig for moving the snap ring S is configured. Further, the vertical moving cylinder 5 and the pushing cylinder 11 direct the split collet portion 60 of the setting jig 6 toward the hole portion of the snap ring S to which the turntable 12 is to be attached while the set pin 7 is projected. A locking drive means for moving and pressing the snap ring S to the outer peripheral surface of the split collet portion 60 by its elastic force, and the setting jig 6 are moved toward the end surface of the shaft-shaped work W to move the setting pin 7 After the tip end is brought into contact with the end face of the shaft-like work, the split collet portion 60 is expanded at the tip end enlargement portion 70 of the set pin 7, whereby the snap ring S is expanded beyond the outer diameter dimension of the shaft-like work W, It is a mounting drive means for moving the pushing jig 10 to push and mount the extended snap ring S into the tip ring groove W1 of the shaft-like work W 1.

Next, the operation will be described. When the snap ring S is mounted on the shaft-shaped work W, a plurality of snap rings S are stacked and placed on the mounting table 120 of the turntable 12 along the axis. When the apparatus is operated, the mounting table 120 is pushed up by the push-up cylinder 13, and the uppermost snap ring S is set at a predetermined height, while the movable frame 3 is locked by the front-rear moving cylinder 4. Moved to A. At this locking position A, the set jig 6 is lowered by the vertically moving cylinder 5, and the tip split collet portion 60 is pressed inside the uppermost snap ring S, so that one snap ring S is split by elastic force. It can be locked to the stepped portion 61 of the collet portion 60.

When the snap ring S is locked, the movable frame 3 moves from the locking position A to the mounting position B. At this mounting position B, the set jig 6 descends toward the tip of the shaft-shaped workpiece W, the set pin 7 also descends together with the set jig 6, and first, the tip end of the set pin 7 is the end surface of the shaft-shaped workpiece W. 2 (see FIG. 2), only the tip split collet portion 60 of the setting jig 6 descends to the end face of the shaft-shaped work W while contracting the spring member 8, so that the split collet portion 60 is set. The snap ring S, which is expanded by the enlarged tip end portion 70 of the shaft and is locked to the split collet portion 60, is expanded to a size larger than the outer diameter of the shaft-shaped work W (see FIG. 3). Next, the pushing jig 10 is lowered by the pushing cylinder 11, and the expanded snap ring S is pushed in the axial direction (see the chain double-dashed line in FIG. 3), and the snap ring S is pushed into the tip of the shaft-shaped work W. In rare cases, when the ring groove W1 is reached, it is fitted into the ring groove W1 by its elastic return force (see FIG. 3).

When the snap ring S is attached, the pushing jig 10 is raised by the pushing cylinder 11 and returns to its original position, and then the setting jig 6 is raised by the vertically moving cylinder 5. Although it returns toward the original position, at this time, since the elastic force of the snap ring S does not act on the collet portion 60 at the tip of the set jig 6, the set jig 6 begins to return at the same time. The set pin 7 begins to project from the tip of the split collet portion 60 by the biasing force of the spring member 8 and thus returns to the original state. The shaft-shaped work W on which the snap ring S is mounted is sent to the next step by the conveyor 14, and a new shaft-shaped work W is conveyed to the mounting position B. After that, the same operation is repeated, and the snap rings S of the mounting table 120 are mounted on the shaft-shaped work W one after another. When all the snap rings S on the mounting table 120 are mounted, the turntable 12 rotates and the next mounting table 120 on which the snap rings S are stacked is set to the locking position A.

As described above, the snap ring S can be automatically installed in the ring groove W1 of the shaft-shaped work W by simply setting a large number of snap rings S on the mounting table 120. As a result, the burden on the operator can be significantly reduced, the work time can be significantly reduced, and the workability of mounting the snap ring S can be improved. Further, since the main part of the device is constructed by the combination of the setting jig 6, the setting pin 7 and the pushing jig 10, the structure of the device is very simple and the cost is not increased.

[0017]

[Effect of device]

 As described above, according to the present invention, a large number of snap rings can be automatically attached to a shaft-like work, work load can be reduced and work time can be shortened, and workability can be greatly improved. The device can be constructed at low cost.

[Brief description of drawings]

FIG. 1 shows an overall structure of an automatic mounting device for a snap ring according to an embodiment of the present invention, a partial cross section of an enlarged main part thereof, a plane cross section of a split collet part of a set jig and a set pin, and an entire snap ring. It is a figure.

FIG. 2 is an enlarged cross-sectional view showing a state before the automatic mounting device is mounted.

FIG. 3 is an enlarged cross-sectional view showing a state during mounting of the automatic mounting apparatus.

[Explanation of symbols]

5 Vertical movement cylinder (locking drive means and mounting drive means) 6 Set jig 60 Split collet part 7 Set pin 70 Enlarged part 10 Pushing jig 11 Pushing cylinder (mounting driving means) 12 Turntable (supply jig) 120 mounting Stand (Supply jig) 12 Push-up cylinder (Supply jig) S Snap ring W Axial workpiece

Claims (2)

[Scope of utility model registration request] 1. A set jig having a tubular split collet portion formed at the tip thereof, and a snap ring elastically locked to the outer peripheral surface of the split collet portion, and a plurality of snap rings are stacked and placed on the uppermost stage. Supply jig that moves the snap ring so that the snap ring comes to the specified supply position, and the above-mentioned set jig relative to the top snap ring, and push the tip collet part inside the snap ring. An automatic mounting device for a snap ring, comprising: a locking drive means for locking the snap ring to the outer peripheral surface of the split collet portion by elastic force. 2. A set jig having a tubular split collet portion formed at a tip thereof, and a snap ring elastically locked to an outer peripheral surface of the split collet portion; An enlarged portion for expanding the split collet portion is formed, and the enlarged portion is disposed on the outer circumference of the split collet portion and the set pin protruding from the split collet portion by the biasing force of the spring member. Pushing the snap ring onto the shaft-like work in the axial direction and mounting it, and the set jig relative to the end face of the shaft-like work, so that the tip of the set pin contacts the end face of the shaft-like work. The split collet part is expanded by the tip enlarged part of the set pin by making contact with it and the snap ring is expanded beyond the outer diameter of the shaft-like work, and then the pushing jig is moved. An automatic snap ring mounting apparatus, comprising: mounting drive means for moving and pushing the expanded snap ring onto the tip of a shaft-shaped work.