JP2993875B2 - Press-in device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work for assembling parts, in which a bearing or the like is pressed into a mounting hole from the inside of a box-like member having a bottom such as a differential case, and a stopper for preventing the bearing from coming off. The present invention relates to a press-fitting device capable of mounting a wheel and press-fitting an oil seal member at the same time.

[0002]

2. Description of the Related Art In order to press-fit a bearing, a retaining ring for stopping a bearing, and an oil seal, a conventional press-fitting component such as a bearing is pressed into a work assembling hole and then manually or stopped by a device. A process of attaching a wheel and press-fitting an oil seal is required. Therefore, a manual operation or a device operation is required for each process, which requires a large number of man-hours, and requires a manual operation, resulting in poor efficiency.

[0003] Japanese Utility Model Laid-Open No. 62-104826 discloses a technique in which press-fitting of a bearing and mounting of a retaining ring are performed simultaneously. In this technology, a press-fit part (bearing) is temporarily held by a holding member with a retaining ring facing it,
While pressing the retaining ring with a press-fitting punch, the press-fit component below this is press-fitted into a work assembling hole, and the retaining ring is mounted in a groove formed in the work assembling hole together with the press-fitting of the press-fitting component.

[0004]

The above-mentioned prior art is a technique in which press-fitting of a press-fitting part and mounting of a retaining ring are performed from outside the work. The work has a box shape with a bottom like a differential case. In the case where a mounting hole for a press-fit component such as a bearing is provided inside the bottom portion of the work, it is technically difficult to press-fit the press-fit component from the outside of the work and mount the retaining ring. Therefore, in the above-mentioned differential case, it is preferable that the press-fitting of the press-fitting parts such as the bearings and the mounting of the retaining ring are performed from the inside of the press-fitting part mounting hole of the work.
With the above-mentioned conventional apparatus or its modification, it is difficult to press-fit a part from the inside of the work assembling hole.

[0005] In addition to the above, it is inevitable to attach an oil seal to the press-fitted bearing. However, in the conventional device, since the bearing is press-fitted and the retaining ring is attached from the outside, the oil seal is simultaneously attached from this direction. Press-fitting is difficult and practically impossible.
At present, it has to be executed manually or by a separate device.

[0006] In view of the above problems of the prior art, the present inventors have
In particular, in the case of a workpiece such as a differential case, it is preferable that a press-fitting part and a retaining ring are press-fitted and mounted from the inside of the assembling hole, and if possible, an oil seal is press-fitted into the press-fitting part.
The present invention has been made in view of a demand that it can be performed by the same device at the same time when the snap ring is mounted.

Accordingly, an object of the present invention is to press-fit and assemble a press-fitting component such as a bearing from the inside of a work into an assembling hole provided at the bottom of the work such as a differential case. A retaining ring for stopping is mounted to enable press-fitting and mounting of press-fit parts and retaining rings from inside the work. Further, this can be surely executed by a simple mechanism. More importantly, while the press-fitting of the press-fitting parts and the mounting of the retaining ring are performed, the oil seal can be press-fitted and mounted at the same time. Therefore, these operations, that is, the press-fitting of the press-fitted parts, the mounting of the retaining ring, the press-fitting of the oil seal, and the man-hour for mounting can be reduced, and each press-fitting and mounting can be performed in one process. To provide a press-fitting device capable of performing efficient press-fitting and mounting.

The object of the present invention is to ensure that the press-fitting and mounting of the oil seal can be executed by the pressing mechanism at the time of press-fitting the component into the work. For this reason, press-fit parts
The press-fitting and mounting of the oil seal can be performed by utilizing a mechanism required for the snap ring mounting mechanism, and the press-fitting and mounting of a plurality of parts can be performed in a single step with a simple structure as a whole device. An object of the present invention is to provide such a press-fitting device.

[0009]

According to the present invention, in order to solve the above-mentioned problems, a work having a press-fitting part mounting hole on the inside thereof is set downward, and the mounting hole is set downward.
A press-fitting device for press-fitting a press-fitting component from the inside into the mounting hole and mounting a C-retaining ring, which is resiliently urged to move in a longitudinal direction to a base, and places a work at a set position. A work mounting table, a receiving table that is vertically slidably fitted to a column vertically installed on the base, and is resiliently mounted, and is configured to be mounted on the receiving table and expand and contract in the radial direction. Outer member,
A lower press-fit head composed of an inner member arranged inside the outer member and configured to be radially expandable and contractable, and a cam mechanism for expanding and contracting one of the inner and outer members of the lower press-fit head,
The press-fitting device includes an upper press-fitting head that is disposed to face the lower press-fitting head, presses the work downward, and sets and press-fits an oil seal from above and outside the mounting hole of the work.

According to a second aspect of the present invention, a fixing base for supporting a retaining ring and supporting a press-fitting part is provided between the inner and outer expanding and contracting members of the lower press-fitting head. A cam that engages with the mechanism, and the engagement between the cam of the outer member and the cam mechanism causes the outer member to expand and contract and the inner member to interlock, and is set between the fixed base and the outer member and the inner member. The diameter of the C retaining ring was reduced and the C retaining ring was attached to the work assembling hole.

[0011]

Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings should be viewed in the direction of reference numerals. FIG. 1 is a front view in which a main part of the press-fitting device according to the present invention is longitudinally cut, FIG. 2 is a side view in which a main part of the press-fitting device is cut out longitudinally, FIG. 3 is an exploded perspective view of a lower press-fitting head, and FIG. FIG. 5 is a front view, FIG. 5 is a side view of the entire press-fitting device, FIG. 6 is a longitudinal sectional side view similar to FIG. 2 in a state where a bearing, a C retaining ring, and a differential case, which are press-fitting components, are set in the press-fitting device. Is press-fitted halfway into the inside of the inner hole of the differential case, and the oil seal is being press-fitted. FIG. 8 is a longitudinal sectional side view similar to FIG. 6, and FIG. FIG. 9 is a view similar to FIG. 7 showing a state in which the mounting is completed, and FIG. 9 is an enlarged sectional view of a main part of the upper press-fit head.

In FIG. 1, reference numeral 1 denotes a press-fitting device, and FIG. 1 shows a system of a lower press-fitting head. The horizontal base 2 has convex rails 3a, 3a. A base 4 is horizontally disposed on the base 2, and the base 4 has concave rails 3b, 3b engaging with the convex rails 3a, 3a on the lower surface. The base 4 is configured to be movable through the race mechanism 3 in the front and back sides of the sheet of FIG. 1 and in FIG.

A column 5 is erected vertically on an intermediate portion of the horizontal base 4 in the left-right direction, and a work mounting table 6 is disposed on the base 4 so as to be separated upward from the column 5 around the column. Set up. The mounting table 6 is provided with an opening 6a at the center thereof to play with the support column 5, and a vertical hole 6b in which a spring holder 7 is raised on the upper surface is provided at a part near one side on the left and right sides. On the other hand, to Okoshi設the spring guide rod 8 to the base 4, the rod 8 is longitudinal hole 7 which is formed on the top portion 7a of the spring holder 7 through the longitudinal hole 6 b upward
Pass through b. The rod 8 has a large diameter head 8a and a vertical through hole 7
b. Coil spring 9 around rod 8
, The spring 9 is provided on the base 4 and the mounting holder 6 on the side of the spring holder 7.
Is mounted between the tops 7a, and the mounting table 6 is repelled upward.

Guide rods 10 are erected on the left and right sides of the base 4 on the other side.
a, a guide cylinder hole 11 comprising a sleeve 11b and the like is provided;
The guide cylinder hole 11 is slidably fitted to the guide rod 10 to guide and guarantee the vertical movement of the mounting table 6. A work positioning pin 12 is provided on the upper surface of a portion of the mounting table 6 close to the central opening 6a, and a work W, in the illustrated example, a differential case is vertically arranged at the center of the mounting table 6 as shown in FIG. The positioning pin 12 is engaged with the positioning hole W2 on the lower surface of the flange portion W1 at the lower end, and the positioning is performed.

The support column 5 is set to a height reaching a middle portion in the height direction of the work W in a set state of the work W, and an elevating platform 13 having a vertical through hole 13a in the center is provided on the upper portion of the support column 5. Is slidably fitted in the longitudinal axis direction. The elevator 13 is
A small diameter lower half portion 13b as shown in FIG. 3, the upper half portion 13c
It has a large diameter and a shelf 13d at the rear of the upper half 13c,
The shelf 13d has two mounting holes 13e, 13e.

The elevating platform 13 has a key groove 13f at a part of the inner diameter of the vertical through hole 13a, while a key 14 is provided at a corresponding upper periphery of the column 5, and the key 14 and the key groove 13f are provided.
To ensure vertical sliding along the column 5 of the lift 13. An outer member 15 having a split structure is placed on the elevating platform 13, and the outer member 15 includes symmetrical semicircular outer member halves 15a, 15a.

Support portions 15b, 15b are symmetrically protruded from the rear portions of the halves 15a, 15a, and the mounting holes 15c, 15c are vertically passed through these portions. Attachment holes 13e, 13e vertically extending through the bolt-shaped support shafts 16, 16 from the respective mounting holes 15c, 15c of the halves 15a, 15a, and vertically mounting the support shafts 16, 16 on the shelf 13d of the lower lifting platform 13. , And tightened with a nut 17 from below.
15a is mounted and supported on the elevating platform 13 with the support shafts 16 and 16 as fulcrums so as to be able to expand and contract in the radial direction.

At the tip portions of the outer members 15a, 15a, symmetrically-shaped U-shaped holding portions 15d are provided, respectively, in a plan view.
The cam rollers 18, 1 are attached to the holding portions 15d, 15d via
8 is supported. The lower half of the inner diameter of each half 15a, 15a of the outer member is provided with semicircular shelves 15e, 15e so as to surround the circumference of the column 5.

After supporting the above-mentioned elevating table 13 and the respective halves 15a, 15a of the outer member 15 radially expanding and contracting in a horizontal plane, a fixing table 19 is fixed to the top of the column with bolts 20. The fixing base 19 is provided with each half 15a, 15
a, which is fitted between the inner diameter portions so as to face the shelves 15e, 15e, and a flange portion 19 which faces the shelves 15e, 15e at a lower portion.
a, an upper columnar portion 19b having a smaller diameter than this, and a top portion 19c having a further smaller diameter, and mounting grooves 19d and 19e of a C retaining ring are provided in upper and lower two stages on an upper periphery of the columnar portion 19b. The fixing base 19 is provided with a mounting hole 19f extending vertically.
The fixing base 19 is fixed to the top of the column 5 by passing a bolt 20 from above.

On the flange 19a of the fixing base 19, the inner member 2 having a split structure is
The inner member 21 includes symmetrical semicircular inner member halves 21a, 21a. The inner member halves 21a, 21a have inner diameters surrounding the columnar portion 19b, and outer sides are surrounded by the inner diameters of the halves 15a, 15a of the outer member 15, and face the shelves 15e, 15e.

Between the opposing surfaces 21b, 21b at one end of the inner member halves 21a, 21a, a spring 21c that resiliently and urges the opposing surface in a direction of expanding the opposing surface is contracted. A support hole is formed symmetrically to the support hole, and both ends of the coil spring are fitted and locked in the support hole, and are resiliently and urged in a direction of expanding between the opposing surfaces 21b, 21b. The above inner member half 21
The upper and lower parts a and 21a face the collar 22 and the C retaining ring 23 at the upper end thereof to regulate the upper side. The collar 22 and the C retaining ring 23 are arranged on the upper periphery of the columnar part 19b of the fixing base 19 described above. The two mounting grooves 19d and 19e are engaged with the mounting grooves 19d and 19e.
The upper half of the inner halves 21a is prevented from falling off.

On the mounting table 6, a cam mechanism 24 as shown in FIG. The cam mechanism 24 includes legs 24a, 24 having cam surfaces 25, 25 on opposed inner surfaces.
a, a stopper 24b is provided between the tops of the legs. The cam surfaces 25, 25 have vertical lower half portions 25a, 25a with a large interval therebetween, and intermediate upper portions 25b, 25a.
b constitutes an inclined surface on each inner side, the upper portions 25c, 25c are vertical, and the interval therebetween is narrow. The cam rollers 18, 18 provided at the tips of the halves 15a, 15a of the outer member 15 are set to face between the cam surfaces 25, 25.

As shown in FIGS. 1 and 2, a coil spring 26 is interposed on the circumference of the above-mentioned support column 5, and the spring 26 is slidably fitted in the longitudinal direction on the base 4 and the support column 5. It is interposed between the lower surfaces of the lifting table 13. With the spring 26, the lift 13 is resiliently urged upward, and the lift 13 is mounted on the lower part of the fixed base 19 by the shelves 15e of the halves 15a of the outer member 15 arranged thereon. By contacting the lower surface of the flange portion 19a, the limit of the ascending limit is performed. Thus, configuring the lower side press-fitting head 27.

On the other hand, above the lower press-fit head 27, an upper press-fit head 28 as shown in FIG. FIG. 9 shows an elevating head 29 which constitutes a main part of the press-fitting head 28. The elevating head 29 is, as shown in FIG.
As shown in FIG. 9, it is fixed to the lower end of the elevating part 32 of the ascending / descending ram 31 supported by the ram 31 via a bolt 33 vertically penetrated from below.

The above elevating head 29 has a large diameter upper part 29.
a and a small-diameter lower portion 29b are integrally provided. The lower surface of the upper half 29a of the large diameter of the lifting head 29 holds the work W
9c. A vertical through-hole 29e is provided vertically at the center of the lower end surface 29d of the small-diameter lower portion 29b, a bolt 33 is vertically passed through from below, and is screwed to the elevating portion 32, and the elevating head 29 is fixed to the elevating portion 32.

An oil seal 40 inner diameter is fitted around the small diameter lower half 29b of the elevating head 29 to temporarily hold the oil seal 40. An example of the oil seal 40 is shown in FIG. 9. The oil seal 40 is formed in a ring shape, has a substantially U-shape in cross section, and integrally has a protruding piece 40 b outward from the lower end of the inner diameter portion 40 a. A spring 40c is mounted on the upper part of the protruding piece 40b, and an L-shaped core material 40f is embedded in the outer diameter part 40d and the upper piece 40e. The state in which the oil seal 40 is fitted into the small-diameter lower half portion 29b is as shown in FIG. 9. The inner diameter portion 40a is fitted around the lower half portion 29b, and the upper surface of the upper piece 40e is the lower surface 2a of the upper half portion 29a.
9c contacts the lower surface of the inner diameter portion.

[0027] With reference to FIG. 5 the entire device, the device 1 a base 2 is disposed on the machine base 34, the lower side head 27 of the press apparatus 1 described above in the first half part on this is provided, the base 2
An L-shaped base frame 30 is erected in the latter half of the frame, and the mechanism of the upper press-fit head 28 described above is arranged on the base frame 30. Machine stand 34
The upper press-fitting device 1 is surrounded by a frame 36 having a wire mesh 35,
A door 37 is provided on the left side of the drawing, and is opened to set a press-fitted part or the like. In FIG. 5, the worker 38 is shown by an imaginary line.

Next, the press-fitting of the press-fitting parts, the C retaining ring, and the oil seal by the press-fitting device 1 according to the present invention, and the operation of the mounting operation will be described. 6 to 8 are diagrams showing the operation over time, in which a workpiece W for press-fitting a part is a differential case in the illustrated example, and the differential case W is arranged vertically so that the bearing mounting hole W3 faces downward, that is, faces inward. For this reason, stoppers 6c are provided on the base 6 to restrict the inside of the lower end flange portion W1 of the differential case W. Assembly hole W3
Is provided with a C retaining ring locking groove W4 at the inner side in the axial direction of the inner diameter portion, in FIG. 6, below, and the assembling hole W3 communicates concentrically with the upper shaft insertion hole W5. The diameter is smaller than the mounting hole W3.

First, the entire lower press-fitting head 27 is wound around the column 5 and is moved to the upper limit position as shown in FIG. 6 by the elastic force of the spring 26 interposed between the base 4 and the lower surface of the elevator 13. is there. The mounting table 6 is resiliently and urged upward by a spring 9 interposed between the mounting table 6 and the base 4, and is located at the ascending limit position. In this position, the cam rollers 18, 18 at the distal ends of the halves 15a, 15a of the outer member 15 are connected to the cam mechanism 2 fixed to the mounting table 6.
In the relative positional relationship of No. 4, it is located below the solid line in FIG.

In this position, as shown in FIG.
Cam roller 1 between lower half portions 25a, 25a
8, 18 are abutted and regulated. Therefore, the cam rollers 18, 18 can be expanded and the outer member 15 can be opened.
Inner member 2 interposed between the inner diameter portions of the half bodies 15a, 15a
By the expanding action of the first half 21a, 21a by the spring 22,
The respective halves 15a, 15a of the outer member 15 are enlarged in diameter, and in this state, the upper halves 21a, 21a of the inner member 21 are positioned within the inner diameters of the respective halves 15a, 15a of the outer member 15. A C retaining ring 41 similar to the C retaining ring 23 shown in 3 is placed and set. Since the outer shape of the C retaining ring 41 is the same as that of the C retaining ring 23 except for the diameter, the C retaining ring 41 is not shown as a perspective view of a single product.

The bearing 42 is placed and set vertically from above the C retaining ring 41. The bearing 42 is the outer race 4
The lower surface of 2a faces the C retaining ring 41, and the lower surface of the inner race 42b is the stepped portion 1 at the upper end of the columnar portion 19b of the fixing base 19.
9g, and the inner diameter of the inner race 42b is
The lower press-fit head 27 is fitted with C
The retaining ring 41 and the bearing 42 are placed and set. Next, the differential case W is set so that the bearing assembling hole W3 is oriented vertically downward, and the press-fit head 27 faces the hollow portion that is open downward.
The differential case W is placed on the mounting table 6, and the differential case W
Positioned by stoppers 6c. This state is shown in FIG.

Thereafter, the upper head 28 facing upward is lowered, and the oil seal 40 is fitted and temporarily held around the small-diameter lower portion 29b of the lift head 29 constituting a main part thereof as described above. I have. The elevating head 29 is lowered, and the small-diameter lower portion 29b of the elevating head 29 first enters the shaft insertion hole W5 above the differential case W, and the oil seal 40 set around the lower portion 29b also enters the shaft insertion hole W5. I do.

As the lifting head lower part 29b enters the shaft insertion hole W5 of the differential case W, the oil seal 40 temporarily held around the lower part 29b is forcibly inserted into the shaft insertion hole W5 of the differential case W. With the further lowering of the elevating head 29,
The work W holding surface 29c on the lower surface of the large-diameter upper portion 29b of the elevating head 29 abuts on the upper end portion W6 of the differential case W, and press fitting of the oil seal 40 into the shaft insertion hole W5 is completed at this time.

When the lifting head 29 is further lowered, the differential case W is pushed down against the spring 9 and the bearing 42 mounted and set on the lower head 27 is attached to the assembly hole W of the differential case W.
3, the upper part of the bearing 42 enters the mounting hole W3, and is sequentially press-fitted.

FIG. 7 shows an initial state of press-fitting of the bearing 42. The bearing 42 is sequentially press-fitted into the mounting hole W3 of the differential case W by being pressed downward of the differential case W.
The pressing force is transmitted to the upper head 27 via the bearing 42,
The lift 13 of the upper head 27 is allowed to slide downward along the column 5 against the spring 26. As described above, the bearing 42 is gradually press-fitted into the mounting hole W3 of the differential case W while allowing the downward movement of the lift 13.

The bearing 42 is finally left on the fixed base 19 of the lower press-fit head 27 by the downward movement of the lower press-fit head 27, while
Each half 15a, 15a of the outer member 15 slides downward by the action of the spring 26, and the bearing 42 releases the restraint of the upper head 27 and is pressed into the assembly hole W3. In this press-fitting completed state, the upper end of the bearing 42 reaches the shoulder W6 at the boundary between the mounting hole W3 and the shaft insertion hole W5.

On the other hand, the C retaining ring 41 located below the bearing 42 is inserted into the inside from the lower end of the mounting hole W3. At this time, the cam mechanism 2 shown in FIG.
4 also descends, and the cam rollers 18, 18 on the upper head 27 side.
Moves relatively upward as indicated by the imaginary line in FIG. The cam rollers 18, 18 are separated from an intermediate portion 25 b symmetrically inclined inside the cam surface 25 from an upper portion 2 having a narrow interval.
5c, and as a result, the expanded outer member 15 is reduced in diameter against the spring 21c of the inner member 21, and the inner and outer members 1
The C retaining ring 41 interposed between 5 and 21 is reduced in diameter.

As a result, the C retaining ring 41 enters the assembling hole W3 of the differential case W with the diameter reduced, and the upper bearing 42
Faces the groove W4 of the assembly hole W3 immediately below. On the other hand, the upper end surface of the lifting table 13 of the lower head 27 is provided with an assembling hole W3 of the differential case W.
The C retaining ring 41 comes into contact with the peripheral lower surface W7 and slides downward with the pressing force, releases the restraint of the outer member 15, expands in diameter, elastically engages in the groove W4, and is mounted in the groove W4. It will be. This state is shown in FIG.

As described above, the bearing 41 is press-fitted into the assembling hole W3 on the inner side (downward) of the differential case W.
The C-retaining ring 41, which is the thrust-direction stopper 2, is mounted in the groove W4. At the same time, differential case W
Head 29 of the upper press-fit head 28 for lowering and pressing
The oil seal temporarily held can also be press-fitted into the shaft insertion hole W5 outside the mounting hole W3 for assembling the bearing. Accordingly, the C retaining ring 41 and the bearing 42 are set on the lower press-fitting head 27, and the differential case W is set on the mounting table 6, while the upper press-fitting head 28 has the oil seal 4
0, press-fit bearing 42, press-fit C retaining ring 41,
The oil seal 40 can be mounted at the same time in the mounting process, and these three components can be simultaneously press-fitted and mounted in a single process.

Although the present invention has been described in detail with reference to the drawings, the press-fitted parts are not limited to the bearings, and the work is not limited to the differential case. The present invention is not limited to the above-described example, and the symmetry of implementation is arbitrary.

[0041]

According to the present invention as described above, the following effects are exhibited. According to the first aspect of the present invention, a work provided with a mounting hole for a press-fitting component on the inside is set such that the mounting hole faces downward, the press-fitting component is press-fitted into the mounting hole from the inside, and a C-retaining ring is also mounted. An apparatus, which is resiliently urged on a base so as to be movable in a longitudinal direction, and is slidably fitted vertically on a work mounting table on which a work is mounted at a set position, and a support vertically provided on the base. A mounted and resilient cradle, an outer member placed on the cradle and configured to be radially expandable and contractable, and a radially expandable and contractible structure disposed inside the outer member A lower press-fitting head consisting of an inner member, a cam mechanism for expanding and contracting one of the inner and outer members of the lower press-fitting head, and disposed to face the lower press-fitting head, and pressing the work downward, Set and press-fit the oil seal from the upper outside of the work mounting hole Since it is configured press fitting device and a rectangular press-fitting head, first press-fitting parts such as bearings, and C snap ring, press-fitting the oil seal at the same time, can be mounted.

Therefore, according to the present invention, the upper and lower heads,
Press-fit parts such as bearings, C retaining rings, and oil seals are set on the mounting table, the work is set, and the upper press-fit head is lowered and pressed against the lower head, so that these bearings and the like can be processed in one process. Press-fit parts, C retaining rings, and oil seals can be press-fitted and mounted on the work. Therefore, only one press-fitting and mounting work of these parts is required, and the working efficiency can be remarkably improved.In addition, there is no need for an oil seal mounting work or a separate mounting device, and the working time is greatly reduced. Significant reduction in component mounting cost can be achieved.

Also, according to the present invention, a press-fitting part and a C-retaining ring are set on a lower press-fitting head, an oil seal is temporarily held on the upper press-fitting head, and the relative lowering, ascending and pressing operations of the upper press-fitting head and the lower press-fitting head are performed. At the same time, these parts can be press-fitted and mounted on the work, the work is rational, and the operation of the device is rational behavior, so that these parts can be simultaneously pressed-fitted and mounted. The drive mechanism of the device is also required to be a lowering mechanism of the upper press-fitting head. In this respect, the structure of the device is simple, only one power source is required, and a press-fitting and mounting device for these components can be obtained easily and inexpensively. .

Further, according to the present invention, a press-fitting part such as a bearing and a C-retaining ring can be simultaneously press-fitted and mounted from the inside of a work such as a differential case, and an oil seal can be mounted simultaneously from the outside. can, press-fitting by traditional very which was difficult which such a process of the components, the mounting operation smoothly, can be reliably achieved.

According to a second aspect of the present invention, a fixing base for supporting a retaining ring and supporting a press-fitting part is provided between the inner and outer expanding and contracting members of the lower press-fitting head, and the cam mechanism is provided on the expanding and contracting outer member. The cam of the outer member and the cam mechanism engage with each other to interlock the outer member and the inner member that expand and contract, and are set between the fixed base and the outer member and the inner member. The C retaining ring is reduced in diameter and mounted in the work mounting hole. The mounting of the retaining ring in the work mounting hole requires the cam mechanism to expand the diameter simultaneously with the component press-in due to the behavior of the lower press-fitting head. The C retaining ring mounting mechanism can be configured with a simple mechanism without any need for a driving mechanism for the C retaining ring. .

Therefore, the C-retaining ring mounting mechanism constituting the main part of the press-fitting head is simplified, the smooth and reliable mounting operation is ensured, and the C-retaining ring mounting mechanism is rational in structure and operation. can do.

[Brief description of the drawings]

FIG. 1 is a front view of a main part of a press-fitting device according to the present invention, which is longitudinally sectioned.

FIG. 2 is a side view in which a main part of the press-fitting device is longitudinally cut.

FIG. 3 is an exploded perspective view of a lower press-fit head.

FIG. 4 is a front view of a cam mechanism.

FIG. 5 is a side view of the entire press-fitting device.

FIG. 6 is a longitudinal sectional side view similar to FIG. 2 in a state where a bearing, a C retaining ring, and a differential case, which are press-fit parts, are set in a press-fitting device.

FIG. 7 is a longitudinal sectional side view similar to FIG. 6 in which the press-fitting component is press-fitted halfway into an inner mounting hole of the differential case and an oil seal is being press-fitted.

FIG. 8 is a view similar to FIG. 7, showing a state in which press-fitting of a press-fitting component is completed, mounting of a C retaining ring is completed, and mounting of an oil seal is completed.

FIG. 9 is an enlarged sectional view of a main part of the upper press-fit head.

[Explanation of symbols]

W: Work, W3: Assembly hole, 1: Press-in device, 4:
Base: 6: mounting table, 5: support column, 13: elevating platform as receiving table, 15: outer member, 21: inner member, 1
8, 24: cam mechanism, 21: fixed base, 27: upper press-fitting head, 28: lower press-fitting head, 40: oil seal, 41: C retaining ring, 42: bearing as a press-fitting part.

Claims (2)

(57) [Claims] 1. A press-fitting method, wherein a work provided with a press-fitting component assembling hole inside is set with the assembling hole facing downward, the press-fitting component is press-fitted into the assembling hole from the inside, and a C retaining ring is also mounted. An apparatus, which is resiliently urged onto a base so as to be movable in a longitudinal direction, and is slidably fitted vertically on a work mounting table on which a work is mounted at a set position and on a column vertically provided on the base. Dressed,
And a resilient cradle, an outer member mounted on the cradle and configured to be radially expandable and contractable, and an inner side arranged inside the outer member and configured to be radially expandable and contractable. A lower press-fitting head comprising: a member; a cam mechanism for expanding and contracting one of the inner and outer members of the lower press-fitting head; and a cam mechanism disposed to face the lower press-fitting head, and pressing the work downward, And an upper press-fitting head for setting and press-fitting an oil seal from above the outside of the assembling hole of the press-fitting device. 2. A fixed base for supporting a retaining ring and supporting a press-fitting part between the inner and outer expanding / contracting members of the lower press-fitting head, and the expanding / contracting outer member is engaged with the cam mechanism. C cam ring which is provided between the fixed base and the outer and inner members by interlocking the expanding and contracting outer member and the inner member by engaging the cam of the outer member with the cam mechanism. 2. The press-fitting device according to claim 1, wherein the diameter is reduced to be mounted in a mounting hole of the work.