JPH1044057A - Press-in tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a press-in tool which can carry out the press in operation of a press-in part like a pin efficiently. SOLUTION: A rod insertion hole 18 is formed on a holder main body 1 and the holding part 27 of the press-in part is provided on the tip of a rod 19 inserted in the rod insertion hole 18. The press-in part held on the holding part 27 is positioned to a pressin position and the press-in part is pressed in by moving the rod 19 in an axis direction rapidly by the strike operation of a hammer body 9 assembled in the holder main body 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a press-fitting tool used for press-fitting a press-fitting part such as a pin or a bearing.

[0002]

2. Description of the Related Art It is common practice to fit a sprocket onto a shaft and press-fit a spring pin into a radial pin hole formed in the shaft and a boss of the sprocket to fix the sprocket. ing.

[0003] There is a method of press-fitting a pin such as a spring pin while supporting the pin with radio pliers or the like. However, since it is a manual operation, the efficiency is poor. In many cases, there is a problem that the workability is extremely poor.

Further, a press-fitting device for automatically press-fitting a pin has been proposed, but there is a disadvantage that the device itself is large and cannot be used at the stage of assembling a machine or the like.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide a hand-held press-fitting tool which can efficiently press-fit a press-fitted component such as a pin at an assembly site and has excellent workability.

[0006]

In order to solve the above-mentioned problems, according to the present invention, a cylinder chamber is provided in a holder body that can be gripped, and an opening is provided at a distal end surface of the holder body so as to communicate with the cylinder chamber. A rod insertion hole is provided, and a rear end portion is inserted into the rod insertion hole, and a holding portion for a press-fitting part is provided at a distal end portion of the rod which moves axially by a striking action of a hammer body slidably incorporated into the cylinder chamber. Is provided.

In another aspect of the present invention, an adapter is attached to the distal end of the rod, and the adapter is provided with a holding portion for a press-fit component.

[0008]

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

As shown in FIGS. 1 and 2, the holder body 1 includes a cylinder 2, a head cover 3 screwed to a rear end thereof, and a rod cover 4 screwed to a distal end of the cylinder 2. A grip 5 that can be gripped is attached to the outside of the head cover 3.

The cylinder 2 has a cylinder chamber 6 and a guide hole 7 having a diameter larger than that of the cylinder chamber 6.
A tapered surface 8 is provided continuously to the rear end of the inner diameter surface.

In the cylinder chamber 6, a hammer body 9 and a spring 10 for pressing the hammer body 9 toward the head cover 3 are incorporated. The hammer body 9 has at its tip a flange 11 that is guided by the inner diameter surface of the guide hole 7.
The hammer body 9 is provided with a center hole 12 extending in the axial direction from the distal end surface, and an insertion hole 13 orthogonal to the center hole 12 and penetrating from one side of the hammer body 9 to the other side.

An engagement piece 14 is slidably fitted in the insertion hole 13. The engaging piece 14 is displaced in the radial direction of the hammer body 9 by a C-shaped leaf spring 15 fitted to the outer periphery of the tip end of the hammer body 9, and the guide hole 7 is formed on the outer periphery of one end facing the outside from the opening of the insertion hole 13. Arc surface 16 guided by inner diameter surface
Is provided.

The engaging piece 14 is provided with a pin hole 17 penetrating forward and backward. This pin hole 17 is
Is eccentric with respect to the center hole 12 of the hammer body 9 in a state where the circular arc surface 16 is guided by the inner diameter surface of the guide hole 7.

The rod cover 4 has a rod insertion hole 18 formed of a stepped hole. Rod insertion hole 18
Is formed of a large diameter portion 20 and a small diameter portion 21. A ring 22 is slidably attached to a rear end of the small diameter portion 21 located in the guide hole 7.

An auxiliary spring 24 is incorporated between the ring 22 and the flange 23 provided on the large-diameter portion 20 of the rod 19, and the elasticity of the auxiliary spring 24 causes the flange 23 to move to the inner peripheral step 25 of the rod insertion hole 18. , And the ring 22 is pressed against the tip end surface of the hammer body 9.

The rear end of the small diameter portion 21 of the rod 19 is inserted into a center hole 12 formed in the hammer body 9,
The rear end face is engaged with the opening edge of the pin hole 17 formed in the engagement piece 14. The pin 26 provided on the rear end face is inserted into the pin hole 17.

At the tip of the rod 19, a holding portion 27 for press-fitting parts is provided. Here, the holding portion 27 is formed to have an appropriate shape according to the shape of the press-fitted component. For example, as shown in FIG. 2, when the spring pin A is press-fitted, the holding portion 27 is an insertion hole opened at the tip end surface of the rod 19.

FIGS. 2 (I) and 2 (II) show the operation state when the spring pin A is inserted into the pin hole a formed in the work W in a stepwise manner.

Now, the spring pin A is inserted into the holding portion 27 formed of the insertion hole, and the tip of the spring pin A is brought into contact with the opening end of the pin hole a formed in the work W, thereby moving the holder body 1 in the axial direction. , The holder main body 1 moves in the axial direction with respect to the rod 19 in the stopped state, and the movement causes the spring 10 to contract.

As shown in FIG. 2 (II), the holder main body 1 is pushed into a position where the tapered surface 8 formed on the inner periphery of the cylinder 2 engages with the arcuate surface 16 formed on the outer periphery of the engagement piece 14. When the holder body 1 is further pushed, the tapered surface 8 presses the engagement piece 14, and the engagement piece 14
The hammer 9 moves in the radial direction against the elasticity of the plate spring 15.

When the engaging piece 14 moves radially to a position where the pin hole 17 provided in the engaging piece 14 coincides with the center hole 12 formed in the hammer body 9, the small-diameter portion 2 of the rod 19 is moved.
The engagement between the rear end face 1 and the opening edge of the pin hole 17 of the engagement piece 14 is released. Due to the disengagement, the hammer body 9 and the ring 22 rapidly move toward the rod cover 4 due to the elasticity of the spring 10, and the ring 22 hits a step 28 formed in the middle of the outer periphery of the rod 19.

For this reason, the rod 19 moves in the axial direction,
The spring pin A held at the tip of the rod 19 is pressed into the pin hole a of the work W as shown in FIG.

When the pressing of the holder body 1 is released after the hammer body 9 is hit, the rod 19 is moved outward by the elastic force of the auxiliary spring 24, and the flange 23 is formed on the step 25 formed on the inner periphery of the rod cover 4. Hit and rod 1
9 comes out of the pin hole 17 of the engaging piece 14, the engaging piece 14 moves in the radial direction of the hammer body 9 by the elastic force of the C-shaped leaf spring 15, and as shown in FIG. Rod 19
Rear end face engages with the opening edge of the pin hole 17 of the engagement piece 14.

FIGS. 3 to 5 show another embodiment of the present invention. In each embodiment, the adapter 30 is attached to the tip of the rod 19.

Here, a rod insertion hole 31 extending in the axial direction from the rear end surface and a screw hole 32 extending from the outer diameter surface to the rod insertion hole 31 are provided at the rear end of the adapter 30. The ball plunger 33 is screwed. The ball plunger 33 has a ball 34 that is pressed by a spring (not shown), and the adapter 30 is attached to the tip of the rod 19 by engagement of the ball 34 with an engagement groove 35 formed on the outer periphery of the tip of the rod 19. It is attached detachably.

Each of the adapters 30 shown in FIGS.
Is provided with a holding part for press-fitting parts. In the adapter 30 shown in FIG. 3, a pin 36 provided on the distal end surface is used as a holding portion.

Since the inner diameter of the spring pin A can be supported by the pin 36 by using the adapter 30, the rod 19 is formed on the work W by the axial movement of the rod 19 due to the impact of the hammer body 9. The entire spring pin A can be press-fitted into the pin hole a.

In the adapter 30 shown in FIG. 4, a pin hole 3 into which the large-diameter portion b of the stepped pin A can be inserted is provided at the end surface thereof.
7, and the pin hole 37 is used as a holding portion for the press-fitted part.

By using the adapter 30, the stepped pin A can be press-fitted.

In the adapter 30 shown in FIG. 5, a suction passage 38 that opens at the front end surface and side surface is formed, and a tapered sheet surface 39 is formed at the front end opening of the suction passage 38. It is a holding part for press-fit parts.

In the adapter 30, the suction passage 3
By connecting a suction source such as a blower brush 40 or a dropper to the side opening of the suction port 8, suction force can be applied to the suction passage 38, so that the pin A having a pointed head C
Can be press-fitted.

In the embodiments of the present invention, the press-fitting of the pins such as the spring pins A has been described, but the press-fitting parts are not limited to the pins. For example, it may be a bearing. When press-fitting the bearing, a fitting hole into which the bearing can be fitted is formed at the tip of the rod 19 or the tip of the adapter 30, and the fitting hole is used as a holding portion for the press-fitted component.

In the embodiment of the invention, the hammer body 9 is rapidly moved in the axial direction by the elastic force of the spring 10 to perform a striking action. 9 may be rapidly moved in the axial direction.

[0034]

As described above, according to the present invention, a hammer body is incorporated in a holder body which can be gripped, and a press-fitting part is inserted into the tip of a rod which moves rapidly in the axial direction by the impact action of the hammer body. Since the holding portion is provided, the press-fitting operation of the press-fitting parts such as the pins can be performed with one hand at the assembly site of the machine or the like.

Further, after the press-fitting part held by the holding portion is positioned at a press-fitting position such as a pin hole, the rod is rapidly moved in the axial direction by the hammering action of the hammer body. It can be performed efficiently.

[Brief description of the drawings]

FIG. 1 (I) is a sectional view showing an embodiment of the present invention,
(II) is a sectional view taken along the line II-II of (I).

FIGS. 2 (I) and (II) are cross-sectional views showing a press-fitting operation step by step.

FIG. 3 is a sectional view showing another embodiment of the present invention.

FIG. 4 is a sectional view showing another embodiment of the present invention.

FIG. 5 is a sectional view showing still another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Holder main body 6 Cylinder chamber 9 Hammer body 18 Rod insertion hole 19 Rod 27 Holder 36 Pin 37 Pin hole 38 Suction passage

Claims (4)

[Claims] A cylinder chamber and a rod insertion hole communicating with the cylinder chamber and opening at a front end surface of the holder body are provided in a holder body that can be gripped, and a rear end is inserted into the rod insertion hole. A press-fitting tool having a press-fitting component holding portion provided at a distal end portion of a rod that moves axially by a hammering action of a hammer body slidably incorporated in a cylinder chamber. 2. The press-fitting tool according to claim 1, wherein the holding portion is opened at a tip end surface of the rod, and includes an insertion hole into which a part of the press-fitting part can be inserted. 3. The press-fitting tool according to claim 1, wherein an adapter is detachably attached to a tip portion of the rod, and the adapter is provided with a holding portion for a press-fitting component. 4. The press-fitting tool according to claim 3, wherein the holding portion provided on the adapter is opened at a distal end face and a side face of the adapter, and the side face opening is formed by a suction passage connected to a suction source.