JPH04145228A - Bearing press-fitting caulking device - Google Patents

Abstract

PURPOSE:To perform press-fitting and caulking work simultaneously so as to improve manufacturing efficiency by providing a punch body elastically in a punch outer casing by a compression spring, and pushing the punch body down by a fluid pressure cylinder so as to mutually narrow the lower ends of plural caulking claws provided at a caulking means supporting case body. CONSTITUTION:A thin steel pipe A is set to a frame 1, and the inner ring of a bearing B is inserted into the punch part tip small diameter cylinder part 4b1 of a punch body 4. A punch outer casing 3 and the punch body 4 are pushed down by a cylinder rod 11a so as to bring the outer ring of the bearing B into contact with the upper end peripheral edge of the thin steel pipe A. With further lowering, the punch body 4 is pushed down through a compression spring 6 provided at the upper part of the punch body 4 to perform the press-fitting of the bearing B. Simultaneously with the completion of press-fitting, a caulking means supporting body 7 and caulking claws 88 are stopped in their descent, but the punch outer casing 3 continues its descent, and the protrusion 3c of the punch outer casing 3 presses the pressing parts 8a of the caulking claws 8. The caulking claws 8 are thereby oscillated, and thin steel pipe A is caulked by caulking parts 8b.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a bearing press-fitting crimping device that can press-fit a bearing into the end of a thin-walled steel pipe and perform crimping almost simultaneously.

[Conventional technology]

Conventionally, there has been a technology in which bearings are press-fitted into the ends of thin-walled steel pipes for caulking. According to this device, a press-fitting device compresses the bearing, and another crimping device crimps the hair ring press-fit opening of the thin-walled steel pipe. That is, two devices, a press-fitting device and a caulking device, were required.

[Problem to be solved by the invention]

By the way, if separate machines or devices are used for press-fitting and caulking, it takes time, production efficiency is poor, high precision cannot be expected, and furthermore, equipment costs are high and a large amount of installation space is required. was there.

(Means for solving problems) Therefore, the inventor worked diligently to solve the above problem.

As a result of repeated research, the invention was developed by disposing a thin-walled steel pipe on this thin wall so as to face a punch body for press-fitting a bearing, and the punch body being fixed to the end of the cylinder rod of a fluid pressure cylinder within a punch outer casing. a crimping tool support housing is loosely inserted and supported in the bunch outer casing, a plurality of crimping pawls are movably provided in the crimping tool support housing, and the crimping pawls are movably provided in the crimping tool support housing. This is a bearing press-fit crimping device in which the lower ends of the plurality of crimping claws are narrowed to each other when the punch outer casing descends and the crimping tool support casing stops descending. Press-fitting and caulking can be performed almost simultaneously, which solves the above-mentioned problem III.

〔Example〕

Embodiments of the present invention will be described below with reference to FIGS. 1 to 1O.

FIG. 1 is a sectional view showing the entire apparatus of the present invention. Reference numeral 1 denotes a machine frame, and 2 a fixture, which is fixed so as to wrap around the end of a thin-walled steel pipe A such as a steering column. In this fixture 2, as shown in FIG.
The outer periphery of is divided into three parts, and these two parts are used as block piece-shaped support parts 2a.

2a, and the other one is provided with a ramp 2b which can rotate on a horizontal plane, and the thin-walled steel pipe A is supported and fixed vertically by the tip of the clamp 2b and the supporting parts 2a, 2a.

Reference numeral 3 denotes a punch outer casing, and as shown in FIG.
is formed, and a flange portion 3b having a larger diameter than this outer diameter is formed on the outer periphery of the lower end of the punch outer casing 3. A large-diameter portion 4a of the punch body 4 facing in the same direction as the axial direction is housed in the cavity 3a, and is configured to be slidable in the vertical direction.

Specifically, the large diameter portion 4a of the punch body 4 has a cylindrical shape, is housed within the cavity 3a, and is provided so as to be slidable as appropriate. Inside the large diameter portion 4a, a hollow cylindrical spring storage hole 4a+ that is open upward is formed.

The punch portion 4b at the lower end of the large diameter portion 4a is connected to the large diameter portion 4a.
It has a smaller diameter than the diameter a, and is formed to protrude further toward the lower end side than the lower end of the punch outer casing 3. The punch part 4b
The lower end of the punch part has a small diameter cylindrical part 4b+ and a punch surface 4b.
It is composed of i. Further, a hole portion 4bs that opens downward is formed inside the punch portion 4b. Further, a shaft rod 5 is vertically provided at the axis of the punch outer casing 3, the upper end of the shaft rod 5 is fixed inside the punch outer casing 3, and the lower end side of the shaft rod 5 is connected to the cavity 3a and the punch. A bulging portion 5a at the lower end of the punch body 4 extends longitudinally through the punch body 4 and is located within the hole portion 4b, so as to support the punch body 4. In this way, the punch main body 4 is provided so as to be able to slide (elevate and lower) in the axial direction (up and down direction) of the shaft rod 5, and also in the cavity 3 of the punch outer casing 3.
A compression spring 6 such as a compression coil spring is interposed between the inner upper surface a and the spring storage hole 4a+ in the upper part of the punch body 4. Thereby, the punch body 4 is configured to always bounce downward.

Reference numeral 7 denotes a crimping tool support housing, which, as shown in FIG. Cylindrical part 7
and a lower annular support plate 7C formed at the lower end of a. In this state, the flange portion 3b is connected to the cylindrical portion 7a and the upper annular support plate 7b.

It is surrounded by the lower annular support plate 7C, and is normally surrounded by the flange 3b.
An upper annular support plate 7b is superimposed on the upper surface of the crimping tool support housing 7, and the crimping tool support housing 7 is supported in a loosely inserted state.

Reference numeral 8 denotes a caulking pawl, which is L-shaped when viewed from the side, and is pivotally supported inside the caulking tool support housing 7.

Specifically, the caulking claw 8 is as shown in FIG.
In the present invention, four are provided, and these are pivotally supported at equal angles. Furthermore, four approximately triangular bearing portions 9 are provided within the caulking tool support housing 7, and these adjacent bearing portions 9.9
A shaft piece 10 of the caulking pawl 8 is pivotally supported between them.

The caulking pawl 8 presses the pressing portion 8a at the upper end of the caulking pawl 8 by lowering the protrusion 3c provided on the lower surface side of the flange 3b of the punch outer casing 3, and the caulking portions 8b at the bottom are moved inside each other. (See Figures 8 and 9).

Reference numeral 11 denotes a hydraulic or pneumatic hydraulic cylinder, which is connected to the machine frame 1.
The upper part of the punch outer casing 3 and the upper end of the shaft rod 5 are fixed to the lower end of the cylinder 11a.

In the figure, reference numeral 12 denotes a position regulating member, which is provided facing the thin-walled steel pipe A on both sides so as to stop the lowering of the caulking tool support housing 7. AI is a rich portion that is provided at the end of the thin-walled steel pipe A before the press-fitting of the bearing B in order to stop the press-fitting of the bearing B.

[Effect]

First, according to the present invention, first, the thin-walled steel pipe A is set with the fixture 2 provided on the machine frame l, and in the state shown by the solid line in FIG.
Insert the inner ring of bearing B into b+. This insertion force prevents it from falling.Next, from the solid line position in Figure 6, the fluid pressure cylinder 11 is lubricated and the cylinder rod is lubricated.
la is lowered, and along with this lowering, the punch outer casing 3 and the punch body 4 are lowered. Then, the outer ring end of the bearing B is brought into contact with the upper end periphery of the thin-walled steel pipe A (see the chain line in FIG. 6), and when it is further lowered, the bearing B is press-fitted by the punch body 4 via the compression spring 6. This press-fitting is performed using a force that resists the elastic force of the compression spring 6. When the punch body 4 for press-fitting the bearing enters the end of the thin-walled steel pipe A and the press-fitting process of the bearing B is completed (see FIG. 7), the crimping tool support housing 7 is moved to the position regulating member 12.
The crimping tool support housing 7 and the crimping claw 8°8,
... is stopped downward (see Figure 7).

Further, when the cylinder rod lla and the punch outer casing 3 are lowered, the pressing portion 8a of the caulking pawl 8 is pressed by the protrusion 3C of the punch exterior casing 3, and the caulking pawl 8 is supplemented and the caulking portion is pressed. At step 8b, the caulking action of the thin-walled cylindrical portion at the uppermost end of the thin-walled steel pipe A is completed (see FIGS. 8 to 10).

〔Effect of the invention〕

In the present invention, the thin-walled steel pipe A is provided on this axis so as to face the punch body 4 for press-fitting the bearing,
The punch body 4 is slidably resiliently disposed within a punch outer casing 3 fixed to the end of the cylinder rod Ila of a fluid pressure cylinder 11 via a compression spring 6, and a caulking tool support casing 7 is freely attached to the punch outer casing 3. A plurality of crimping pawls 8.8. . . are provided in a swingable manner, and the plurality of crimping claws 88, . . . , 88, . ...By using a bearing positive staking device whose lower ends are narrowed toward each other, firstly, press-fitting and staking work can be performed at the same time, secondly, work time is reduced, and manufacturing efficiency is improved. Thirdly, equipment costs can be reduced, and fourthly, crimping work can be performed in extremely good conditions.

To explain these effects in detail, first of all, press-fitting and crimping work can be performed almost simultaneously on the same machine, which is much more efficient than the conventional method of performing press-fitting and crimping work separately. In addition, manufacturing efficiency can be increased.

Further, the punch body 4 is slidably provided within a punch outer casing 3 fixed to the end of the cylinder rod lla of the fluid pressure cylinder 11, and the punch outer casing 3 and the punch body 4 are elastically connected via a compression spring 6. Therefore, the force for press-fitting the bearing is not the force of the fluid pressure cylinder 11, but the force repelling the compression spring 6, and since the predetermined repulsive force of the spring is utilized, the bearing can be press-fitted with a constant press force at all times. This in turn allows for good positive work.

Next, a caulking tool support housing 7 is loosely inserted and supported in the punch outer housing 3, and a plurality of caulking claws 8, 8, .・
. . are provided in a swingable manner, and the crimping claws 88, . . . ... By making the lower ends narrower toward each other, the crimping operation can be performed in an extremely good condition.

In addition, in the present invention, unlike the conventional method, since the bearing B is press-fitted and caulked in the same mounting and fixed state, the bearing B becomes coaxial with the caulking after press-fitting (the axis at the time of press-fitting and the axis at the time of caulking) (are the same), the caulking work can be performed with an even pressing force, and the uneven load that the bearing B receives can be almost eliminated.

As mentioned above, not only can press-fitting and caulking work be done at the same time, but also this can be done easily and quickly.

Claims (1)

[Claims] (1) A thin-walled steel pipe is disposed on the axis of the pipe so as to face a punch body for press-fitting a bearing, and the punch body is inserted into a punch outer casing fixed to the cylinder rod end of a fluid pressure cylinder via a compression spring. A crimping tool support casing is slidably installed in the punch outer casing, and a crimping tool support casing is loosely inserted and supported, and a plurality of crimping claws are slidably provided in the crimping tool support casing, and the crimping claws are used for lowering the punch outer casing. A bearing press-fit caulking device characterized in that the lower ends of the plurality of caulking pawls narrow toward each other under the condition that the descent of the caulking tool support housing is stopped.