JPH0340588Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is a caulking device for reducing the diameter of a caulked member of a cylindrical anti-vibration rubber bushing, such as a suspension bushing used as a shock absorbing part for automobiles, etc. Regarding.

[Conventional technology]

Cylindrical anti-vibration rubber bushings for damping vibrations are incorporated in the pivot joints at both ends of various suspension members of automobiles and the like. This anti-vibration rubber bushing is made by integrally forming an elastic rubber layer with liquid filled in the void space as needed on the outer periphery of the inner cylindrical metal fitting, and connecting the outer cylindrical metal fitting by fitting it onto the outer periphery and reducing its diameter. Manufactured by

In order to manufacture such a vibration-proof rubber bushing,
A caulking device disclosed in Japanese Patent Application Laid-Open No. 58-203242 is used. As shown in FIG. 3, this conventional anti-vibration rubber bush crimping device has a conical outer shape and a through hole 8 in the center that is concentric with the outer diameter. A die 6 divided into a plurality of pieces by a plane parallel to the center line is inserted into a die holder 7 having a conical hole with the same taper as the outer diameter of the die formed on the inner surface, with a spring 19 interposed between the divided planes. be. By moving this die 6 to the small diameter side of the die holder 7 and reducing the diameter of the through hole 8, the outer cylindrical fitting of the bush inserted into the through hole 8 is reduced in diameter. When expanding the diameter of the through hole 8 of the die 6 by moving to the larger diameter side of the hole, the dividing surface of the die 6 may not open evenly due to uneven repulsive force of the spring 19 or friction of the die. If the diameter is insufficiently expanded, it may be difficult to insert the outer cylindrical metal fitting into the through hole 8 of the die 6 using an automatic feeder.

[Problem that the invention attempts to solve]

The object of the present invention is to provide a vibration-proof rubber bushing device that can accurately expand the diameter of a die from a contracted state.

[Means for solving problems]

The anti-vibration rubber bush caulking device of the present invention has a cylindrical caulking base; a right cylindrical through hole in the center; Divided into multiple dice pieces of the same size on a plane parallel to the center on the radial line of
A die whose large-diameter side end face is placed on a caulking table; has a conical hole that surrounds the outer periphery of the die and the peripheries of the large-diameter side and the small-diameter side, and is in sliding contact with the conical surface at a height slightly higher than the height of the conical surface on the die's outer periphery. and a die holder whose lower end inner surface surrounding the large diameter side periphery of the die is in sliding contact with the outer periphery of the caulking stand; A plurality of wedges that are slidable on one of the wedges and slidably coupled to the other; and a spring that is inserted between the small-diameter end face of the die and the inner surface of the die holder facing the die so as to press the wedges together. and a pressure piece that presses the upper end of the die holder.

〔Example〕

An embodiment of the present invention will be described with reference to the drawings.

Figure 1 is a cross-sectional view of the anti-vibration rubber bush crimping device, and the state before crimping is shown in the right half from the center line.
The figure shows the state when the left half is caulked.
FIG. 2 is a plan view of the die and the die holder in a reduced diameter state, with the small-diameter end face of the die shown in the upper half and the large-diameter end face shown in the lower half.

A cylindrical caulking table 3 is fixed to a support table 4 with bolts 5, and a die 6 and a die 6 are mounted on the caulking table 3.
A die holder 7 surrounding the die is placed.
The die 6 has a right cylindrical through hole 8 in the center, has a truncated conical outer shape having the same center line as the through hole 8, and is placed with the large diameter end surface in contact with the caulking table 3. . The die 6 is divided into a plurality of die pieces 9 of the same size along a plane parallel to the center line on a radial line from the center line.

The die holder 7 surrounds the outer periphery of the die 6 and the peripheries on the large diameter side and the small diameter side, has a conical hole 10 that is slightly higher than the height of the conical surface on the outer periphery of the die, and is in sliding contact with the conical surface, and is fitted with the outer periphery of the die 6. It matches.
In addition, the lower end inner surface 11 of the die holder 7 surrounding the large diameter side periphery of the die 6 is in sliding contact with the outer periphery of the caulking stand 3, and between the small diameter side end surface of the die 6 and the inner surface of the die holder 7 opposing thereto. A spring 12 is inserted into the die holder 7 so as to lift the die holder 7 and form a gap between the die holder 7 and the small-diameter end face of the die 6, as shown in the right half of FIG. In FIG. 2, one spring 12 is arranged so as to come into contact with two die pieces 9, but one spring 12 is attached to each die piece 9.
2 may be placed.

Each divided die piece 9 of the die 6 and the die holder 7 are connected to each other by a wedge 13 which is fixed to the die holder 7 with a bolt 14 and extends along a normal line to the conical surface of the conical hole 10. 13 and the die piece 9 are slidably supported.

The outer cylindrical fitting 1 and the bushing unit 2 inserted into the through hole 8 of the die 6 are normally placed on a caulking stand 3, but in this embodiment, a substantially cylindrical holder 15 is provided on the lower end surface of the through hole 8. The outer cylindrical metal fitting 1 and the bush unit 2 which are fitted into the caulking stand 3 and inserted into the through hole 8 of the die 6 can be placed in a predetermined position.

Above the small diameter side of the die 6 is a die holder 7.
A cylindrical pressure piece 16 is arranged to pressurize the upper end of the cylinder, and is connected to a pressure device (not shown) such as a hydraulic cylinder. In the case of a liquid-filled anti-vibration bushing, the outer cylindrical fitting 1 may lift up as the liquid flows out when the diameter is reduced. A presser piece 17 of the metal fitting 1 is supported by a spring 18 so as to be movable up and down.

[Effect]

In the state before caulking, as shown in the right half of FIG. 7 to the larger diameter side of the conical hole 10, and the inner diameter of the through hole 8 of the die 6 is enlarged so that the outer cylindrical fitting 1 can be easily inserted therein.

After inserting the outer cylindrical fitting 1 and the bushing unit 2 inside the through hole 8, when the pressure piece 16 is lowered by the pressurizing device, the presser piece 17 first presses the upper end of the outer cylindrical fitting 1, and then The pressure piece 16 contacts the upper end of the die holder 7. The conical hole 10 of the die holder 7 is slightly higher than the height of the conical surface on the outer periphery of the die 6, and the inner diameter of the small diameter side of the conical hole 10 is slightly higher than the height of the conical surface on the outer periphery of the die 6.
Since the die holder 7 is formed to be smaller than the outer diameter of the small diameter side of the
As shown in the left half of the figure, each die piece 9 is moved only toward the center while sliding on the conical hole 10 of the die holder 7, so the through hole 8 of the die 6
can be reduced to an inner diameter that allows the outer cylinder fitting 1 to be compressed to a predetermined outer diameter.

When the pressure piece 16 is raised, the die holder 7
is pushed up by the action of the spring 12, and as shown in the right half of FIG. Since the inner diameter of the through hole 8 is enlarged, the product bush can be easily taken out.

[Effects of the invention] According to the invention, each divided die piece is slidably connected to the die holder by a wedge, so that it does not shift in the radial direction or the circumferential direction.
According to the movement of the die holder, it can uniformly move in the radial direction to accurately expand or contract the diameter.
Furthermore, since the die and die holder can be pulled out upward from the fixed caulking table, the die can be easily replaced, and a wide variety of vibration-proof rubber bushings with different dimensions can be manufactured.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the anti-vibration rubber bush caulking device of the present invention, showing the state before caulking in the right half from the center line and the state after caulking in the left half. FIG. 2 is a plan view of the die and die holder in a reduced diameter state according to the present invention, with the small-diameter end face of the die shown in the upper half and the large-diameter end face shown in the lower half. FIG. 3 is a plan view of a conventional die and die holder. 3... Caulking stand, 6... Dice, 7... Dice holder, 8... Through hole, 9... Dice piece, 10
... Conical hole, 12 ... Spring, 13 ... Wedge, 16 ...
...Pressure piece, 19...spring.

Claims (1)

[Scope of utility model registration request] A cylindrical caulking table; a truncated conical shape with a right cylindrical through hole in the center, the outer shape of which is the same as the center line of the through hole, and a plane parallel to the center line on the radiation from the center line. The die is divided into multiple die pieces of the same size, and the large-diameter end face is placed on a caulking table; A die holder having a conical hole which is higher than the other and which is in sliding contact with the conical surface, and whose lower end inner surface surrounding the large diameter side periphery of the die is in sliding contact with the outer periphery of the caulking stand; , a plurality of wedges that are slidable on each divided die piece and at least one of the die holder, and that are slidably coupled to each other; A vibration-proof rubber bush caulking device comprising: a spring inserted between the inner surface and the inner surface so as to press the two; and a pressurizing piece pressurizing the upper end of the die holder.