JP2515240Y2 - Press-fitting 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 press-fitting device for press-fitting a press-fitted body into a pair of left and right press-fitting holes formed on the same axis of a workpiece, and more specifically, for example, an automobile. TECHNICAL FIELD The present invention relates to a device for press-fitting a bush into each press-fitting hole formed at a bifurcated end of a rear trailing arm of a vehicle suspension.

[0002]

2. Description of the Related Art Generally, a rear trailing arm in a vehicle suspension has its front end pivotally supported on the vehicle body side via a pivot shaft and its rear end supporting a rear wheel. Conventionally, there is a rear trailing arm configured as follows. That is, the front end of the rear trailing arm is bifurcated to form a press-fitting hole at each branch end, and a bush as a press-fitted body is press-fitted into each press-fitting hole. Then, the pivot shaft is inserted through these bushes,
As described above, the rear trailing arm is pivotally supported via this pivot shaft. Further, the press-fitting of the bush into the press-fitting hole is conventionally performed as follows. That is, one of the bushes to be press-fitted is first set between the left and right branch ends, and the bush is pushed by the pressing body moved by the cylinder to be press-fitted into one of the left and right press-fitting holes. . Next, another bush is set between the left and right branch ends of the same as above, and this bush is pushed by another pressing body moved by another cylinder to be press-fitted into another press-fitting hole.

[0003]

However, according to the above-mentioned conventional configuration, the bush is first press-fitted into one press-fitting hole, and then the other bush is press-fitted into the other press-fitting hole. There is a problem that it takes a long time. Further, since a cylinder is provided for press-fitting each of the left and right bushes, there is a problem that the structure of the press-fitting device becomes complicated.

[0004]

The purpose of the present invention is to pay attention to the above circumstances, and when press-fitting a press-fitted body into a pair of left-right press-fitting holes formed in a workpiece, press-fitting the press-fitted body. It is an object of the present invention to enable the work to be performed in a short time and to simplify the structure of the device for this press-fitting.

[0005]

The feature of the present invention for achieving the above object is that it is located between left and right press-fitting holes formed on the same shaft center and moves left and right along the shaft center. A pair of left and right pressing bodies that are freely movable is provided, and a cylinder that is movable left and right along the other axis is provided on another axis parallel to the axis of the same. One of the pressing bodies is connected to the cylinder tube side of the cylinder, while the other pressing body is connected to the piston rod side of the cylinder.

[0006]

[Operation] The operation of the above configuration is as follows. When pressing the left bush (press-fitted body) 9 and the right bush (press-fitted body) 10 into the left press-fitting hole (press-fitting hole) 5 and the right press-fitting hole (press-fitting hole) 6 by the press-fitting device 1, As shown by the solid line 1, first, between the left press-fitting hole 5 and the left pressing body (pressing body) 14 and the right press-fitting hole 6 with the left bush 9 and the right bush 10 in a state where the cylinder 21 is contracted. An automatic feeding device (not shown) between the right pressing body 15 and the right pressing body 15.
Set by. Next, the cylinder 21 is extended as shown by a virtual line in FIG. Then, along with this, the left pressing body 14 and the right pressing body 15 move to the left and right, and push the left bush 9 and the right bush 10 to press them into the left press-fitting hole 5 and the right press-fitting hole 6.

Therefore, according to the press-fitting device 1, the left bush 9 and the right bush 1 are inserted into the left press-fitting hole 5 and the right press-fitting hole 6, respectively.
Press-fitting of 0 is achieved by one operation of the cylinder 21.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to the drawings. In the figure, reference numeral 1 is a press-fitting device, and 2 is a rear trailing arm in a suspension for an automobile, which is a workpiece. In the following description, the left and right means the direction toward the drawing.

One end of the rear trailing arm 2 is bifurcated into a left branch end 3 and a right branch end 4, and a left press-fitting hole 5 is formed in the left branch end 3 to form a right branch. A right press-fitting hole 6 is formed at the branch end 4. Both the left press-fitting hole 5 and the right press-fitting hole 6 have a circular cross section and the same size,
In addition, they are arranged on the same horizontal axis 7.

Into the left press-fit hole 5 and the right press-fit hole 6, an elastic rubber left bush 9 and a right bush 10, which are press-fit objects of the same shape and size, are press-fitted, and these left bush 9 and right bush 1 are inserted.
One end side of the rear trailing arm 2 is pivotally supported on the vehicle body side by a pivot shaft (not shown) inserted through 0. Further, a rear wheel (not shown) of the automobile is supported on the rear end side of the rear trailing arm 2 as above.

The press-fitting device 1 is for press-fitting the left bush 9 and the right bush 10 into the left press-fitting hole 5 and the right press-fitting hole 6, and is constructed as follows. The press-fitting device 1 has a machine frame 12, and a support shaft 13 extending in parallel with the shaft center 7 is installed on the machine frame 12. A left and right symmetrical pressing member 14 and a right pressing member 15 are supported on the support shaft 13 so as to be slidable left and right. A guide key 16 extending parallel to the support shaft 13 is attached to the machine frame 12, and guide grooves 17, 17 formed in the left pressing body 14 and the right pressing body 15 are slidably fitted in the guide key 16. As a result, the left pressing body 14 and the right pressing body 15 are connected to each other by the support shaft 1
It is prevented from freely rotating around 3.

The left pressing body 14 and the right pressing body 15 extend radially outward from the support shaft 13 side, and their extending ends 14a and 15a are the left press-fitting holes 5 of the left branching end 3, respectively. ,
It is located between the right branch end 4 and the right press-fitting hole 6. Also,
Support pins 19, 19 projecting in mutually opposite directions on the shaft center 7 are attached to the respective extended ends 14a, 15a, and the support pins 19 and the left bush 9 and the right bush 1 are attached.
Each inner hole of 0 can be fitted.

On another shaft center 20 parallel to the shaft center 7, a hydraulic cylinder 21 is provided which is movable left and right along the other shaft center 20. The cylinder 21 is composed of a cylinder tube 22 and a piston rod 23 extending from a piston (not shown) slidably fitted in the cylinder tube 22. The right pressing body 15 is connected to the left end side of the cylinder tube 22,
The left pressing body 14 is connected to the left end side of the piston rod 23.

With the press-fitting device 1 having the above-described structure, the left press-fitting hole 5 is formed.
When press fitting the left bush 9 and the right bush 10 into the right press-fitting hole 6 and the right press-fit hole 6, first, as shown by the solid line in FIG.
The left bush 9 and the right bush 10 are automatically supplied between the left press-fitting hole 5 and the left pressing body 14 and between the right press-fitting hole 6 and the right pressing body 15 in a state where the cylinder 21 is contracted (not shown). Set). Next, the cylinder 21 is extended as shown by a virtual line in FIG. Then, along with this, the left pressing body 14 and the right pressing body 15 move to the left and right, and first, the support pins 19 are fitted into the inner holes of the left bush 9 and the right bush 10, respectively, and the left bush 9 and the right bush 10 are inserted. Accurately position the bush 10 on the axis 7. Further, with the extension operation of the cylinder 21, the left pressing body 14 and the right pressing body 15 move to push the left bush 9 and the right bush 10, and these are press-fitted into the left press-fitting hole 5 and the right press-fitting hole 6. It

The left bush 9 is inserted into the left press-fitting hole 5.
The external force required to press-fit the right bush 10 into the right press-fit hole 6 and the external force required to press-fit the right bush 10 often do not match. Therefore, the left and right press-fitting is sequentially performed from the one having the smallest external force. When the above-mentioned press-fitting is completed, the left pressing body 14 and the right pressing body 15 are brought into contact with part of the machine frame 12, respectively, and the left pressing body 14 and further left pressing bodies 14 are abutted.
The pushing movement of the right pressing body 15 is prevented. As a result, the left bush 9 and the right bush 10 are pressed into the left and right predetermined positions of the left press-fit hole 5 and the right press-fit hole 6, respectively. Although the above is based on the illustrated example, the cylinder 21 may be an electric type or the like. Alternatively, the press-fitting may be performed by the reduction operation of the cylinder 21.

[0016]

According to the present invention, a pair of left and right pressing bodies which are located between the left and right press-fitting holes provided on the same shaft center and are movable left and right along the shaft center are provided. A cylinder that is movable left and right along another axis parallel to the other axis is provided, and one of the left and right pressing bodies is connected to the cylinder tube side of the cylinder. Since the other pressing body is connected to the piston rod side of the cylinder, the cylinder tube and piston of this cylinder can be operated by operating the cylinder with the press-fitted body set between each press-fitting hole and each pressing body. Each pressing body interlocked with the rod presses the press-fitted body into the corresponding press-fitting hole.

Therefore, since press-fitting of the press-fitted body into each press-fitting hole is achieved by one operation of the cylinder, conventionally, press-fitting into one press-fitting hole and press-fitting into the other press-fitting hole are sequentially performed by individual cylinder operations. Compared with what was done, the press-fitting work can be done in a short time.
Moreover, since the single cylinder is sufficient for press-fitting into the left press-fitting hole and the right press-fitting hole, there is also an advantage that the structure of the press-fitting device is simplified.

[Brief description of drawings]

FIG. 1 is an overall sectional view.

[Explanation of symbols]

 1 Press-fitting device 2 Rear trailing arm (workpiece) 5 Left press-fitting hole (press-fitting hole) 6 Right press-fitting hole (press-fitting hole) 7 Shaft center 9 Left bush (press-fitting body) 10 Right bushing (press-fitting body) 14 Left Pressing body (pressing body) 15 Right pressing body (pressing body) 20 Other axis 21 Cylinder 22 Cylinder tube 23 Piston rod

Claims (1)

(57) [Scope of utility model registration request] 1. A press-fitting device for press-fitting a press-fitted body into a pair of left and right press-fitting holes formed on the same shaft center of a workpiece, the shaft being located between the left and right press-fitting holes. A pair of left and right pressing bodies that are movable left and right along the center is provided, and a cylinder that is movable left and right along the other axis is provided on the other axis parallel to the axis. A press-fitting device in which one of the left and right pressing bodies is connected to the cylinder tube side of the cylinder while the other pressing body is connected to the piston rod side of the same cylinder.