JPS6322018Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a composite press-fitting device, and more particularly to a composite press-fitting device for press-fitting a plurality of parts into a predetermined member by pressing them in the same direction.

For example, in the automobile industry, parts such as a ring gear, bearing inner race, speedometer drive gear, etc. are press-fitted and assembled into a differential gear case (hereinafter referred to as the work).
Assembling the differential gear case assembly. However, the height positions at which these parts are assembled to the workpiece are different;
Also, since there is some variation in each work,
It is difficult to accurately assemble the above-mentioned plurality of parts to the workpiece in one operation, and therefore, conventionally, an assembling station is provided for each part to perform the assembling work. The line was expensive and the work efficiency was poor.

Therefore, an object of the present invention is to provide a composite press-fitting device that can press-fit a plurality of parts into a workpiece in one operation using one station.

The composite press-fitting device according to the present invention has one end open,
a cylindrical case closed at the other end by a bottom;
an outer component holder for supporting a first component that is slidably fitted into the cylindrical case and has a through hole extending in the axial direction of the cylindrical case; a stopper provided on the cylindrical case to restrict movement of the outer component holder toward the open end of the cylindrical case by the urging means; a second member slidably fitted into the through hole of the outer component holder;
an inner parts holder for supporting parts, between the bottom of the cylindrical case and the outer parts holder and the inner parts holder that face the bottom and close the open end of the cylindrical case; and a pressing means for pushing the workpiece supported on the outer parts holder from the open end of the cylindrical case toward the bottom, the workpiece being supported on the outer parts holder. The workpiece positioned and placed on the first part is pushed by the pressing means to press-fit the first part into a predetermined position of the workpiece, and the cylinder of the outer part holder at the time of press-fitting. The hydraulic oil pushed by the movement of the shaped case toward the open end presses the inner component holder supporting the second component toward the workpiece, and the inner component holder supports the second component. is press-fitted into another predetermined position of the workpiece.

With the structure described above, the composite press-fitting device according to the present invention uses the pressing means to press the workpiece positioned and placed on the first component supported on the outer component holder, thereby pushing the first component into the workpiece. At the same time as the second component is press-fitted into a predetermined position, the outer component holder sinks due to this pressure, and the level of the working fluid rises by that amount, which causes the inner component holder supporting the second component to rise. In this way, the second part is press-fitted into the predetermined position of the workpiece, so by operating one pressing means, it is possible to press-fit a plurality of parts into the workpiece at the same time, and as described above. Since the inner component holder that supports the second component is designed to rise, even if there are slight variations in the workpiece, multiple components can be accurately and easily assembled at different heights on the workpiece. Can be assembled.

Next, the principle of the composite press-fitting device of the present invention will be explained with reference to FIG.

In FIG. 1, reference numeral X indicates a cylindrical case, and this cylindrical case X is open at its upper end and closed at its lower end by a bottom portion X2. A sleeve-shaped outer component holder O is slidably fitted into this cylindrical case X. A spring S is disposed below this outer parts holder O.
is urged upward by. The upper end X ₁ of the cylindrical case X protrudes inward, while the upper end O ₁ of the outer parts holder O has a reduced diameter _. abutting the shoulder O ₂ formed by the diametered upper end O ₁ ;
It acts as a stopper to restrict upward movement of the outer component holder O by the spring S.

The inner parts holder 1 is placed on the outer parts holder O.
As shown in the figure, they are slidably fitted with their upper ends protruding from the outer component holder O. Hydraulic oil F is sealed in the bottom of the cylindrical case X.

Next, using the composite press-fitting device with the above structure, the first and second
Press-fitting of the parts (not shown in FIG. 1) will be explained.

First, the first and second components are positioned and placed on the outer and inner component holders O and 1.
Next, the workpiece is positioned and placed on the first component placed on the outer component holder O. At this time,
It is assumed that the second component placed on the inner component holder 1 is not in contact with this workpiece. After this, the workpiece is pressed downward from above by a pressing device such as a cylinder device (not shown in Fig. 1), and the workpiece is supported on the outer component holder O at the first predetermined position. Press fit the first part.

When press-fitting this first part, the outer part holder O
However, when it is lowered by the action of the pressing device, the level of the hydraulic fluid F is gradually raised by that amount, thereby raising the inner component holder 1. As a result, the second component placed on the inner component holder 1 is also raised and press-fitted into the second predetermined position of the workpiece.

As described above, according to the composite press-fitting device of the present invention, a plurality of parts having different press-fitting height positions can be easily and accurately press-fitted into a workpiece using one pressing device.

Hereinafter, a composite press-fitting device according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 2 is a vertical sectional view of a composite press-fitting device according to an embodiment of the present invention, and in this figure, reference numeral 1 denotes
A cylindrical case is shown. This cylindrical case 1 has an open upper end and a lower end closed by a bottom portion 1d. A sleeve-shaped outer component holder 2 is slidably fitted into the cylindrical case 1 . A spring 3 is disposed below the outer parts holder 2, and the outer parts holder 2
is urged upward by this spring 3. An annular recess 1b is provided in the upper part of the inner peripheral wall 1a of the cylindrical case 1.
An annular projection 2b provided on the upper part of the holder is slidably fitted therein. The height of the annular recess 1b is selected to be such that the projection 2b and eventually the outer component holder 2 can be slid with a desired stroke. The upper side 1c of the recess 1b acts as a stopper for restricting upward sliding of the outer component holder 2 by the spring 3. The upper surface 2c of the outer component holder 2 serves as a support surface for a component _P1 to be described later, and a plurality of positioning pins 2d are implanted on the upper surface 2c. This upper surface 2c
is positioned so as to protrude from the upper end of the cylindrical case 1 when the outer component holder 2 is in the upwardly biased position shown in the figure.

A center portion 2e of the inner circumferential surface of the outer component holder 2 has a reduced diameter, and a piston-shaped inner component holder 4 is slidably fitted into the center portion 2e. An upper end enlarged diameter portion 4a and a lower end enlarged diameter portion 4b are formed at the upper and lower ends of the inner component holder 4, respectively. The diameter-reduced central portion 2e of the outer component holder 2 and the enlarged diameter portion 4 at the lower end of the inner component holder 4
A spring 5 is disposed in the chamber C between b, and the inner component holder 4 is biased downward by the spring 5. In addition, the inner parts holder 4
In this case, the spring 5 is not necessarily required because the outer component holder 2 is always urged upward by the spring 3 and pulled downward via the hydraulic oil 8, which will be described later. The upper end enlarged diameter portion 4a of the inner component holder 4 comes into contact with the upper surface of the center portion 2e of the outer component holder 2, and acts as a stopper to restrict downward sliding of the inner component holder 4. . Also,
The enlarged end portion 4b comes into contact with the center portion 2e and acts as a stopper to restrict upward sliding of the inner component holder 4.

A hole 4c is formed in the center of the inner component holder 4, extending downward from the upper surface thereof, and the upper end of the hole 4c is slightly reduced in diameter to form a shoulder portion 4d. A positioning pin 6 is slidably fitted into this hole 4c, and an upper part 6a of this positioning pin 6 protrudes from the upper part of the diameter-reduced hole 4c. A spring 7 is disposed between the bottom of the positioning pin 6 and the bottom of the hole 4c, and the positioning pin 6 is urged upward by the spring 7. The shoulder portion 4d of the hole 4c abuts against the shoulder portion 6b formed by the diameter-reduced upper portion of the positioning pin 6 to restrict upward movement of the positioning pin 6.

Hydraulic oil 8 is sealed in the bottom of the cylindrical case 1, and an oil pressure sensor 9 is communicated with the bottom of the cylindrical case 1 for the purpose described later. The bottom of the cylindrical case 1, in which hydraulic oil 8 is sealed, communicates with a chamber C, in which the spring 5 is housed, and this chamber C is also filled with hydraulic oil. Above the cylindrical case 1,
A hydraulic cylinder device 10 is provided, and this hydraulic cylinder device 10 has a press-fitting head 10a that moves in the vertical direction. Note that the inner peripheral wall 1a of the cylindrical case 1 and the outer peripheral wall 2 of the outer component holder 2
a, and between the inner peripheral wall of the outer component holder 2 and the inner peripheral wall of the inner component holder 4 are made liquid-tight by seal members 11 and 12, respectively.

Next, press-fitting of the parts P ₁ to _{P 4} into the workpiece W using the composite press-fitting device having the structure described above will be described. Note that the work W is a differential gear case of an automobile, and parts P ₁ to P ₄ are:
The ring gear, bearing inner race, spudometer drive gear, and bearing inner race are shown respectively.

When press-fitting the parts P ₁ to _{P 4} of the workpiece W, first the part P ₂ is fitted onto the upper part 6a of the positioning pin 6 as shown in the figure, supported by the inner parts holder 4 in a positioned state, and the part P ₁ is supported by the outer component holder 2 in a state in which the positioning pin 2d is fitted into the rivet mounting hole P ₁ ' formed in the component to position it. Next, as shown in the figure, the workpiece W is inserted into the rivet mounting hole formed around the workpiece.
Component P ₂ supported on the outer component holder 2 with the positioning pin 2d fitted to W' and positioned.
Place it on top. After this, place the parts on this work W.
Place P ₃ and P ₄ as shown.

Next, the cylinder device 10 is operated to lower the press-fitting head 10a, and the parts P ₃ and P ₄ are inserted into the workpiece W.
The parts _P1 are press-fitted around the lower part of the workpiece W into the upper part of the workpiece W. At this time, the outer parts holder 2
is pushed downward via workpiece W and part _P1 .
Then, the hydraulic oil 8 raises the inner component pedestal 4, and accordingly raises the component _P2 , which is press-fitted into the center of the lower part of the workpiece W, which is being pushed downward by the cylinder device 10. Therefore, as shown in the figure, even if there is a difference in the mounting position of the parts P ₁ and P ₂ to the workpiece W, the parts can be easily and accurately mounted.
P ₁ and P ₂ can be press-fitted into the workpiece W. During this press-fitting, the positioning pin 6 fitted into the part P ₂ is pushed down by the workpiece W against the spring 7 and comes out of the part P ₂ , so it does not interfere with the above-mentioned press-fitting. .

The hydraulic sensor 9 detects the pressure of the hydraulic oil 8 when the press-fitting is completed, and stops the operation of the hydraulic cylinder 10. As a result of the above, the parts to the work W
Complete press-fitting of P ₁ to _{P 4} .

In the embodiments described above, the composite press-in device is a rigid type, but it may also be a horizontal type, or a type having a plurality of inner component holders operated by hydraulic oil. It may be.

[Brief explanation of the drawing]

FIG. 1 is a principle diagram showing the principle of a composite press-fitting device of the present invention, and FIG. 2 is a vertical sectional view of the composite press-fitting device according to an embodiment of the present invention. X, 1... Cylindrical case, O, 2... Outer parts holder, S, 3... Spring, 1, 4...
Inner parts pedestal, F, 8...Hydraulic oil.

Claims (1)

[Scope of utility model registration request] In a compound press-fitting device that press-fits multiple parts into a predetermined workpiece by pressing them in the same direction, there is a cylindrical case with one end open and the other end closed by the bottom, and a slider inside the cylindrical case. an outer component holder for supporting a first component which is movably fitted and has a through hole extending in the axial direction of the cylindrical case; a stopper member provided on the cylindrical case to restrict movement of the outer component holder toward the open end of the cylindrical case by the urging means; an inner component holder for supporting a second component slidably fitted into the through hole, the bottom of the cylindrical case, and an inner component holder that faces the bottom and closes the open end of the cylindrical case; Pressing means for pushing hydraulic oil sealed between the outer parts holder and the inner parts holder, and the workpiece supported on the outer parts holder from the open end of the cylindrical case toward the bottom. The workpiece positioned and placed on the first component supported on the outer component holder is pushed by the pressing means, and the first component is press-fitted into a predetermined position of the workpiece. During this press-fitting, the inner component holder supporting the second component is moved by the hydraulic oil pushed by the movement of the outer component holder toward the open end of the cylindrical case. Press in the direction of the workpiece,
A composite press-fitting device that press-fits the second component into another predetermined position of the workpiece.