JPH0739540Y2 - Automatic snap ring mounting device - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for automatically mounting a snap ring in a ring groove of a shaft-like work.

[0002]

2. Description of the Related Art In various machines, snap rings,
For example, a C-shaped retaining ring is often used to fix and position the assembled component with respect to the shaft component. Conventionally, when attaching a snap ring to a shaft component, an operator uses snap ring pliers to insert the snap ring into the ring groove of the shaft component.

[0003]

However, in the conventional mounting method, the mounting is done manually and the snap rings are mounted one by one, so that the work is very complicated and the working time becomes long. There was a problem. 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, in the case of automating the mounting of the snap ring, the movable part of the device can be linearly moved to hold the snap ring, and the snap ring can be mounted by moving in the axial direction of the shaft component. The snap ring can be held and attached only by the linear movement of the device, 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]

In view of the above, an automatic snap ring mounting apparatus according to the present invention has a description that "a tubular split collet portion is formed at the tip and the snap ring is elastically locked to the outer peripheral surface of the split collet portion. The set jig and the set jig are placed on top of each other, and the set jig is moved to move the snap ring so that the snap ring at the top reaches the specified supply position. And a locking drive means for moving the tip of the split collet portion inside the snap ring by pushing the snap ring inside the snap ring by elastic force , and slidably housed in the split collet portion. Is
The tip of the split collet is pushed by the urging force of the spring member at the tip.
An enlarged portion is formed to project from the spring member of the enlarged portion.
It snaps when immersed in the split collet that resists the biasing force.
Pin that expands the ring beyond the outer diameter of the shaft-like work
It is equipped with and ”.

In addition, 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 the snap ring is elastically locked to the outer peripheral surface of the split collet portion. A set pin slidably accommodated in the split collet portion, an enlarged portion for expanding the split collet portion is formed at the tip, and the enlarged portion is projected from the split collet portion by the biasing force of the spring member,
A set pin 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 a set jig that moves relative to the end face of the axial work, The tip of the abutment is brought into contact with the end face of the shaft-like work, and the split collet part is expanded at the tip enlarged part of the set pin, whereby the snap ring is expanded beyond the outer diameter of the shaft-like work and the pushing jig is moved. And a mounting drive means for mounting the extended snap ring by pushing it onto the tip of the shaft-like work ”.

[0006]

When the tip drive split collet portion of the setting jig is moved relative to the supply jig by the locking drive means and is pressed inside one snap ring, the snap ring is elastically forced to the split collet portion of the setting jig. Locked in. Therefore, the enlarged part of the set pin is used as the biasing force of the spring member.
If you immerse yourself in the split collet,
Expanded and the snap ring is larger than the outer diameter of the axial work piece
Since it can be expanded to various sizes, the collet tip of the axial work can be split.
Attach the snap ring lightly and smoothly when it comes into contact with the end
it can. Further , in the supply jig, the snap ring is moved so that the next one snap ring to be locked is set at a predetermined supply position.

On the other hand , when the setting driving means moves the set jig together with the set pin with respect to the tip of the shaft-like work, and the tip of the set pin comes into contact with the end face of the shaft-like work, only the tip split collet portion is rotated. -Shaped workpiece is moved to the end surface and expanded by the tip enlarged portion of the set pin, whereby the snap ring locked to the tip collet of the set jig is larger than the outer diameter of the shaft-shaped workpiece. Since the size is expanded, 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. Once installed,
The pushing jig and the setting jig are returned to their original positions,
Since the elastic force of the snap ring does not act on the collet part at the tip of the set jig, at the same time as the set jig returns, the set pin projects from the tip of the collet part due to its urging force, thus returning to the original state. Return.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to specific examples shown in the drawings. 1 to 3 show an automatic snap ring mounting apparatus 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 setting jig 6 as shown in FIG. 1 (c), and the tip of the split collet portion 60 is formed. A step portion 61 that locks the snap ring S is formed on the. The set pin 7 is slidably accommodated in the split collet portion 60, and an enlarged portion 70 is provided at the tip of the set pin 7.
Is formed, and a disc-shaped retaining portion 71 is formed at the rear end to prevent the set pin 7 from coming off the split collet portion 60. The spring member 8 is interposed 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.

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

A turntable 12 is arranged near the locking position A on the floor surface, and a plurality of mounting tables 120 are provided on the turntable 12 at predetermined intervals on the circumference. A plurality of snap rings S are stacked on the table 120 along the axis (not shown) of the table 120.
20 can move up and down along the axis. further,
A push-up cylinder 13 is mounted on the locking position A on the floor surface, and a pair of push-up rods 131 is fixed to a piston rod 130 of the push-up cylinder 13, and both push-up rods 131 are turntables. The mounting table 120 is pushed up by inserting 12 insertion holes (not shown) 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 axial work W upright, for example, a conveyor mechanism 14 for locking and transporting the upright shaft 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 is
And a push-up cylinder 13 constitutes a supply jig for placing a plurality of snap rings S on top of each other and moving the plurality of snap rings S so that one snap ring S to be mounted is at a predetermined supply position. ing. Further, the vertical moving cylinder 5 and the pushing cylinder 11 move the split collet portion 60 of the setting jig 6 toward the hole portion of the snap ring S to be mounted on the turntable 12 with the set pin 7 protruding. And pushes the snap ring S with its elastic force to the outer peripheral surface of the split collet 60, and the set jig 6 is moved toward the end face of the shaft-shaped work W, and the tip of the set pin 7 is moved. The split collet portion 60 is brought into contact with the end face of the shaft-like work piece to be expanded at the tip enlargement part 70 of the set pin 7, whereby the snap ring S is expanded beyond the outer diameter dimension of the shaft-like work piece W, and then the pushing jig. It serves as a mounting drive means for moving the expanded snap ring S into the tip ring groove W1 of the shaft-like work W by moving 10 to mount.

Next, the operation will be described. When attaching the snap ring S to the shaft-shaped work W, the turntable 1
A plurality of snap rings S are stacked and placed on the second mounting table 120 along the axis. When the device is operated, the mounting table 120 is pushed up by the push-up cylinder 13, and the uppermost snap ring S is set to a predetermined height, while the movable frame 3 is locked by the front-rear moving cylinder 4 at the locking position A.
Be moved to. 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 of the set pin 7 is brought to the end face of the shaft-shaped workpiece W. After the contact (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 ends. The snap ring S expanded by the expansion part 70 and locked to the split collet part 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. , When the ring groove W1 is reached, it is fitted into the ring groove W1 by its elastic return force (see FIG. 3).
reference).

When the snap ring S is attached, the pushing jig 10 is raised by the pushing cylinder 11 and returns toward its original position, and then the setting jig 6 is raised by the vertical moving cylinder 5 to return to its original position. However, at this time, since the elastic force of the snap ring S does not act on the 6-tip split collet portion 60 of the set jig, the set jig 6 starts to return at the same time as the set pin 7 The urging force of the spring member 8 starts to project from the tip of the split collet portion 60, thus returning 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 rings S can be automatically installed in the ring groove W1 of the shaft-like work W simply by stacking and 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 does not increase.

[0017]

As described above, according to the present invention, a large number of snap rings can be automatically attached to a shaft-like work, the work load can be reduced and the work time can be shortened, and the workability can be greatly improved. Further, there is an effect that the device can be inexpensively constructed with a simple structure.

[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. A locking drive means for locking the snap ring to the outer peripheral surface of the split collet portion by elastic force , and a slidably housed inside the split collet portion,
When the spring member urges,
The enlarged portion to be projected is formed, and the spring member of the enlarged portion is biased.
Snap ring when immersed in split collet to resist force
An automatic snap ring mounting device, characterized in that the snap ring is equipped with a set pin that extends beyond the outer diameter of the shaft-like work . 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.