JPS6144746Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a collar press-fitting device that is capable of press-fitting a collar without leaving any gap between the collar and the end face of a bearing press-fitted into an axle shaft of an automobile, for example.

Conventionally, as shown in FIGS. 1 and 2, this type of press-fitting device 1 includes a press ram having a substantially U-shaped horizontal section and opening toward one side from a central portion 2a in which an axle shaft 5 is accommodated. 2, a press-fitting tool 3 fixed to the lower end of the press ram 2, and having a substantially C-shaped horizontal cross section and a collar guide 4 opening toward one side from a central portion 3b in which the axle shaft 5 is also accommodated. ing. Further, a collar abutting surface 3a is formed on the lower surface of the press-fitting tool 3, and comes into contact with the upper end surface of the collar 6 fitted into the axle shaft 5.

In order to press-fit the collar 6 using this collar press-fitting device 1, the spacer 7 and the bearing 8 are first mounted on the axle shaft 5, and then the collar 6 is inserted. This axle shaft 5 is housed in the center of the device 1, and the shaft 5 is held by bringing the lower end surface of the axle shaft 5 into contact with a table 9. Then, the collar contact surface 3a of the press-fitting tool 3 is brought into contact with the upper end surface of the collar 6, and then the collar 6 is pressed by the press ram 2 until the lower end surface of the collar 6 comes into contact with the upper end surface of the bearing 8. Then, the collar 6 is guided by the collar guide 4 and press-fitted onto the axle shaft 5.

However, in this conventional device, if the press ram 2 is tilted with respect to the table 9 or the axle shaft 5 is tilted, and the central axes of the press ram 2 and the axle shaft 5 do not match, the collar of the press fitting tool 3 is initially The surface 3a contacts only a part of the upper end surface of the collar 6, and as it is pressed by the press ram 2, the collar contact surface 3a comes into contact with the entire upper end surface of the collar 6. Therefore, the collar 6 is press-fitted in an inclined state with respect to the axle shaft 5, and when a part of the lower end surface of the collar 6 comes into contact with the upper end surface of the bearing 8, the collar 6 cannot be press-fitted any further. , color 6
There was a drawback that a gap was created between the lower end surface and the upper end surface of the bearing 8.

The present invention was developed in view of the above-mentioned conventional problems, and includes a casing having a substantially C-shaped horizontal cross section, and a casing that is provided inside the casing so as to be slidable in a plane perpendicular to its axis, and whose lower surface is A pressing body formed in a substantially spherical shape and a plurality of spheres disposed in arcuate grooves on the upper surface of the pressing body rotatably contact the lower surface of the pressing body, so that the pressing body is swingably provided in the casing. Consists of a press-fitting tool with a collar abutment surface formed on the lower surface, a rubber provided between the inner wall of the casing and the bottom of the press-fitting tool, and a stopper for aligning the press body and the opening of the press-fitting tool with the opening of the casing. By providing a press head and a press ram that is fixed to the upper surface of the casing and press-fits the collar into a predetermined position on the workpiece via the press head, it is possible to apply the collar to the workpiece without creating a gap between the collar and the bearing. It is an object of the present invention to provide a collar press-fitting device capable of press-fitting.

An embodiment of the present invention will be described below with reference to the drawings. 3 and 4 show a collar press-fitting device 10 according to an embodiment of the present invention. In the figure, the first
The same reference numerals as in the figures and FIG. 2 indicate the same parts.
The press head 11 is fixed to the lower end of the press ram 2 with bolts, and is composed of a casing 12, a press body 13 and a press fitting tool 14 provided within the casing 12. Press ram 2, casing 12, pressing body 13 and press fitting tool 1
4 is a central portion 2 in which the axle shaft 5 is housed for the purpose of taking in and out the axle shaft 5.
It opens toward one side from a, 12a, 13a, and 14e, and has a substantially C-shaped horizontal section.
A pressing body 13 is provided in the casing 12 so that its upper surface is in slidable contact with the upper inner wall of the casing 12 so that it can be slid in a plane perpendicular to the central axis of the casing 12. The lower surface of this pressing body 13 is formed into a substantially spherical shape. Further, a recess 13b is formed in a part of the side wall of the pressing body 13,
The tip of a stopper 15a attached to the casing 12 while being biased inward by a spring is inserted into the recess 13b to the extent that it does not inhibit the sliding movement of the pressing body 13, thereby preventing the pressing body 13 from rotating. .

On the other hand, the press fitting tool 1 provided in the casing 12
4 swings along the lower surface of the pressing body 13 by a plurality of spheres 14b arranged in the arcuate grooves 14a on the upper surface rotatably abutting the substantially spherical lower surface of the pressing body 13. It has become freely possible. . Furthermore, a collar abutting surface 14c is provided on the lower surface of the press-fitting tool 14 and comes into contact with the upper end surface of the collar 6 fitted to the axle shaft 5. Further, a recess 14d is provided in a part of the side wall of the casing 1.
The tip of a stopper 15b, which is attached to 2 and urged inward by a spring, is inserted into the recess 14d to such an extent that the swinging of the press-fitting tool 14 is not inhibited, thereby preventing the press-fitting tool 14 from rotating.

In addition, the casing 12, the pressing body 13, and the press-fitting tool 14 are provided with respective central portions 12a, 13a, 14e.
and so that the position of the opening does not shift significantly due to the sliding of the pressing body 13 or the swinging of the press-fitting tool 14.
Hard rubbers 16a and 16b are attached to the side surfaces of the pressing body 13 and the press-fitting tool 14 at positions 120 degrees from the stoppers 15a and 15b on both sides, respectively, and furthermore, hard rubbers 16a and 16b are attached to the bottom surface of the press-fitting tool 14 to prevent the press-fitting tool 14 from tilting too much. A hard rubber 16c is attached to prevent this from happening.

Next, a method of press-fitting the collar 6 using this device will be explained. When the directions of both the center axes of the press ram 2 and the axle shaft 5 are the same, the pressing direction of the press-fitting tool 14 and the direction of the center axis of the axle shaft 5 are the same, and when the press-fitting starts, the direction of the center axis of the press-fitting tool 14 is the same. The collar abutting surface 14c abuts the entire upper end surface of the collar 6. Therefore, when the press-fitting is completed, the lower end surface of the collar 6 comes into contact with the entire upper end surface of the bearing 8, and no gap is created between the two.

Further, if the directions of the central axes of the press ram 2 and the axle shaft 5 do not match, the collar 6 is press-fitted as follows. For example, when the axle shaft 5 is tilted to the left in FIG. Collar contact surface 1
4c and the upper end surface of the collar 6 are in contact with each other on the right side in the figure, but there is a gap on the left side. When the pressing head 11 is further pressed by the press ram 2, this pressing force is applied to the casing 12, the pressing body 13,
Sphere 14b, press fit tool 14 and collar contact surface 14
c, and the pressing body 13 slides in the direction B due to the difference in force applied to the left and right sides of the collar contact surface 14c.
Accordingly, the press-fitting tool 14 swings in the direction A, and the press-fitting tool 14 is tilted so that its collar contact surface 14c contacts the entire upper end surface of the collar 6. When the collar contact surface 14c is in contact with the entire upper end surface of the collar 6 in this way, the center axes of the press-fitting tool 14 and the collar 6 are aligned with the center axis of the axle shaft 5. In this way, when the press-fitting tool 14 starts to come into contact with the collar 6, the press-fitting tool 14 swings in the direction of the center axis of the axle shaft 5, and the center axes of the press-fitting tool 14, the collar 6, and the axle shaft 5 are aligned. color 6
Since the press-fitting is performed, the lower end surface of the collar 2 comes into contact with the entire upper end surface of the bearing 8, and the collar 6 can be mounted without creating a gap between the two. Also, the axle shaft 5 is connected to the press ram 2.
However, when it tilts to the right in the opposite direction to the above, the press body 13 and the press-fitting tool 14 slide and swing in the opposite directions, so that a gap is created between them and the bearing 8 in the same way as above. It is possible to attach a collar 6 that does not occur.

According to the collar press-fitting device of this embodiment having the above-described configuration, even if the directions of the central axes of the press ram 2 and the axle shaft 5 do not match, the press body 13 and the press-fit tool 14 can slide and swing. The collar 6 is always aligned in the direction of the center axis of the axle shaft 5.
Since the bearing 8 is press-fitted, the lower end surface of the collar 6 is
Since the collar 6 comes into contact with the entire upper end surface of the bearing 8, the collar 6 can be attached without creating a gap between the two as in the conventional case, and the occurrence of backlash in the bearing 8 can be prevented.

Although the case of an automobile axle shaft has been described above as an example, the apparatus of the present invention can be similarly applied to a shaft-like long workpiece.

As described above, according to the present invention, horizontal cross section approximately C
A letter-shaped casing, the upper surface of which is slidably abutted against the inner wall of the upper surface of the casing, so that the casing is slidably provided within the casing in a plane perpendicular to its axis, and the lower surface thereof is formed into a substantially spherical shape. A pressing body and a plurality of spheres arranged in an arcuate groove on the upper surface of the pressing body rotatably contact the lower surface of the pressing body, so that the pressing body is swingably provided in the casing, and the upper end surface of the collar is attached to the lower surface of the pressing body. and a press-fitting tool formed with a collar abutment surface that comes into contact with the press head.
By providing a press ram that is fixed to the upper surface of the casing and press-fits the collar into a predetermined position on the axle shaft via the pressing head, the collar is press-fitted so that the lower end surface of the collar is always in contact with the entire upper end surface of the bearing. We can provide a color press-fitting device that can.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional front view of main parts of a conventional collar press-fitting device, FIG. 2 is a plan view of a press-fitting tool of the above device, and FIG. 3 is a plan view of a press-fitting tool of a collar press-fitting device according to an embodiment of the present invention. FIG. 4 is a cross-sectional view of the above device taken along the line shown in FIG. 3. 2... Press ram, 2a... Center part of press ram, 5... Axle shaft, 6... Collar, 1
2... Casing, 13... Pressing body, 13a...
Center part of pressing body, 14... Press-fitting tool, 14a... Arc-shaped groove, 14b... Sphere, 14c... Collar contact surface, 14e... Center part of press-fitting tool, 11... Pressing head, 10... Color press-in device.

Claims (1)

[Scope of utility model registration request] The present invention relates to a casing having an approximately C-shaped horizontal cross section, which is opened from the center toward one side and in which a shaft-shaped workpiece is housed, a pressing body having an approximately C-shaped horizontal cross section, which is provided inside the casing so as to be slidable within a plane perpendicular to the central axis thereof by its upper surface being slidably abutted against the inner wall of the upper surface of the casing, and which has an approximately spherical lower surface and is opened from the center toward one side, and a plurality of spheres disposed in an arc-shaped groove on the upper surface are rotatably abutted against the approximately spherical lower surface of the pressing body, thereby forming the casing. a press head consisting of a press tool which is swingably mounted within a casing and has a generally C-shaped horizontal cross section with an opening from the center toward one side, a rubber provided between the inner wall of the casing and the bottom of the press tool, and a stopper for aligning the openings of the press body and the press tool with the opening of the casing, and a press ram which is fixed to the upper surface of the casing and has an opening in the same direction as the press head, for pressing and attaching the collar to a predetermined position on the workpiece via the press head.