JPH056027Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a jig device used in a press machine for press-fitting a bearing constituting a bearing.

<Prior art> In general, an indirect axle device using a rolling bearing is installed in the axle portion of a car, for example, in which the hub of the axle to which the wheels and brake equipment are attached is supported by a bearing in the housing of the car body. It is normal to do so.

Conventionally, a bearing press-fitting machine such as that disclosed in Japanese Utility Model Publication No. 57-54989, illustrated in FIG. 8, has been used for bearing press-fitting work for assembling and manufacturing such indirect axle devices.

That is, the pedestal 2 of the bearing press-fitting device main body 1
Stack bearing B1, hub H, and bearing B2 in this order, and press the hydraulic ram activation button 15.
Press to lower the hydraulic ram 3, and press the press fitting tool 4 to
Press-fit the bearings B1 and B2 into the hub H, respectively.

When the bearing is press-fitted, the hydraulic pressure that operates the hydraulic ram 3 rises and reaches its maximum level just before the bearing is press-fitted, and the pressure gauge 14 indicates this, but this pressure is led to the pressure switch 11 via the pipe 13. , actuates the switch, thereby actuating the grease filling cylinder 10 and delivering a quantity of grease through the high pressure hose 12 and through the coupler plug 8.

Therefore, the grease passes through the press-fitting tool 4, the hollow parts 4a and 6a of the filling nozzle 6, and is ejected from the nozzle hole 6b (at this time, the filling nozzle 6 passes through the hollow part Ha of the hub H).
Fill the hollow part Ha of the hub H with a certain amount of grease.

When filling is completed, the hydraulic ram 3 is raised to complete one process.

Although not shown in the drawings, the bearing used at this time is, for example, a sealed double-row tapered roller bearing described in Japanese Utility Model Application Publication No. 106626/1983.

Further, in the bearing press-fitting device described above, press-fitting of the bearing into the hub h and filling of grease are performed simultaneously. Thereafter, a separate press machine was used to set the shaft part and the like in the inner ring of the bearing at a predetermined position aligned with the shaft center, and then press and press-fit it into place.

<Problems to be solved by the invention> In the bearing press-fitting device as described above, first,
This is done in separate work processes using two machines: a dedicated press machine that press-fits the outer ring part of the bearing into the bearing mounting hollow, and a dedicated press machine that press-fits the shaft rod etc. into the inner ring part of the bearing. Therefore, it was necessary to set up two press machines, and there was a problem that the work efficiency was poor, such as having to perform positioning every time the work process changed.

In view of the above-mentioned points, the purpose of this invention is to enable the press-fitting of bearings and the press-fitting of shaft parts (for example, hubs) using a single press machine and a jig device attached to the press machine. do.

<Means for Solving the Problems> A jig device for an indirect axle bearing and hub press-fitting press machine according to the present invention which achieves the above object is provided in a press machine and is installed in a cylindrical hole of a housing in an indirect axle of a vehicle. This is a jig for press-fitting a bearing, and then press-fitting a shaft portion of a hub into this bearing, and this jig is equipped with a lower press-fitting jig and an upper press-fitting jig, and the lower press-fitting jig is equipped with an upper press-fitting jig. A support grease seal for supporting the inner ring of the bearing that is spring-biased in the axial direction toward the jig, a stationary cam cylinder disposed below this support grease seal, and the above-mentioned support grease seal and cam cylinder. formed between the support grease seals and the cam barrel, and depending on the relative rotational angular position between the support grease seals and the cam barrel, on the one hand, allowing downward movement of the support grease seals against the spring force; On the other hand, it has a cam means for preventing this downward movement, and a lower punch that is disposed on the outer periphery of the support grease seal and comes into contact with the housing to restrict the downward movement of the housing, and the upper press-fitting jig prevents the downward movement. Therefore, it has a bearing guide that presses the inner ring of the bearing and press-fits the bearing into the cylindrical hole of the housing placed on the support grease seal, and the support grease seal is allowed to move downward by the cam means. The bearing is press-fitted by the upper bearing guide that descends into the cylindrical hole of the housing above the support grease seal, and the hub is inserted into the inner ring of the bearing by the upper press-fitting jig that descends while preventing the support grease seal from descending by the cam means. The shaft rod, etc., is press-fitted into the shaft.

(Function) When press-fitting the bearing, the cam means allows the supporting grease seal to descend, that is, the inner ring is elastically supported, and the grease seal is lowered following the press-fitting operation. On the other hand, when press-fitting the shaft rod, etc., the cam means fixes the support grease seal in a predetermined position, and the cam means connects the support grease seal and the cam cylinder so that the shaft rod, etc. is press-fitted with the inner ring fixed. By switching according to the relative rotational angle position of the press machine, press-fitting of the bearing and press-fitting of the shaft portion, etc., can be carried out with a single press machine.

<Example> Hereinafter, an example of the jig device for a bearing press-fitting press according to the present invention will be described with reference to FIGS. 1 to 7. Note that in FIGS. 1 to 7, parts corresponding to those in FIG. 8 are given the same reference numerals for convenience of explanation.

1 and 2 are partial cross-sectional front views showing the main parts of jigs and the like for assembling and manufacturing the indirect axle device with one press machine, and 20 is an upper press-fitting jig;
1 is a bearing support housing on the vehicle body side, 22
is the lower press-fit jig. The upper press-fitting jig 20 and the lower press-fitting jig 22 are each mounted on a press device (not shown), and are operated in the vertical direction indicated by arrow A in the figure to perform the work.

As shown in FIG. 2, the upper press-fitting jig has a cylindrical shape as a whole, and a cylindrical case 23 is attached to the lower part thereof. A cylindrical truncated bearing guide 24 having an outer diameter larger than the inner diameter of the inner ring of the bearing B is installed in the hollow center of the casing 23. The lower circumferential corner of this upper bearing guide 24 is chamfered at approximately 45° to form a guide tapered portion 24a.

This Atsupa bearing guide 24 has a shaft hole in its center, is inserted into the free end of the central rod portion 26 and is slidably installed, and the free end of the central rod portion 26 has a retaining member 27. to prevent the Atsupa bearing guide 24 from falling off.

In addition, a compression coil spring 29 is installed between this Atsupa bearing guide 24 and the abutment at the root of the central rod portion 26, so that the Atsupa bearing guide 24 is always attached to the free end side of the central rod portion 26. be encouraged.

In addition, a predetermined cylindrical cylindrical member such as the one shown in the drawing is installed to cover the outer circumferential portion of the Atsuppa bearing guide 24 . Further, an Atsuppa punch 30 is installed at a predetermined position on the outer circumferential side of the Atsupa grease seal 25. Note that the upper press-fitting jig 20 as a whole is attached to the arm 3 of the press device.
1.

In FIG. 2, B is a bearing, and in this example, it includes an outer ring 32 and a plurality of rollers 33 installed inside the outer ring 32.
and a pair of inner rings 34, 34 which are divided into upper and lower halves and are combined into one as shown in the figure.

This bearing B is a so-called sealed double-row tapered roller bearing, and before installation, vinyl chloride or the like is formed in an annular shape in the inner peripheral hole to prevent the pair of inner rings 34, 34 from disassembling. A collar 35 is fitted to prevent the inner lace from coming off.

The housing 21 is a support member attached to the vehicle body, and is provided with a cylindrical hole 36 into which the bearing B is fitted. Further, a snap spring groove 37 is provided inside the cylindrical hole 36, and a support flange 38 is provided at the bottom of the cylindrical hole 36.

The lower press-fit jig 22 is used by being attached to a cradle or arm of a press device (not shown).
The whole body is in the shape of a rotating body. A center rod 40 is inserted into the center shaft portion so as to be slidable in the axial direction with respect to the base member 41. A lower bearing guide 42 in the shape of a circular annular pedestal is inserted into the upper end of the central core rod 40 in the drawing.

The lower bearing guide 42 has an outer diameter slightly smaller than the inner diameter of the inner ring of the bearing, and is formed to have an outer diameter suitable for positioning by fitting. In addition, the upper corner circumference is chamfered at 45° to form the inner ring 3 of bearing B.
4. Make it easy to insert.

Further, a retaining metal fitting 43 is fixed to the upper end of the center rod 40, and the lower bearing guide 42
prevent it from falling out.

A receiving metal fitting 44 is installed at the lower end of this central core rod 40. In addition, a spring housing 45 in the shape of a spring is installed in the center of the base member 41 so that the lower end of the central core rod 40 enters inside the spring housing 45. A compression coil spring 46 is installed at , so that the lower bearing guide 42 receives a biasing force upward in the figure. In particular, the biasing force of the compression coil spring 46 that biases this lower bearing is set to be a required amount weaker than the biasing force of the compression coil spring 29 that biases the upper bearing guide 24 of the upper press-fitting jig 20 mentioned above. I'll keep it.

In addition, a cylindrical support grease seal 47 surrounding the outer periphery of the lower bearing guide 42 is provided.
The center rod 40 is installed so as to be slidable in the axial direction from the position shown by the solid line to the position shown by the dotted line in the figure.

This support grease seal 47 is shown in FIGS.
As shown in the figure, it has a trapezoidal (or rectangular) cam sector 48a at its lower part. Further, a cylindrical cam barrel 49 having the same diameter is installed below the support grease seal 47, and this cam barrel 49 has the same diameter.
9 is provided with a cam sector 48b that meshes with the cam sector 48a, and both cam sectors 48a, 48b
They are configured so that they engage and approach each other in the state shown in FIG. 6, and disengage and move away in the state shown in FIG. 7.

Further, a flange-shaped protrusion 50 is provided on the inner circumference of the support grease seal 47, and this and the base member 41
A compression coil spring 53 is installed in the space between the
The support grease seal 47 is configured to be biased toward the position indicated by the dotted line.

Although not shown, the cam sectors 48a and 48b
Of course, it is also possible to use a curved line with a smooth rising portion and rotate the cam cylinder body 49 to forcibly move the support grease seal 47 upward. In the case of this configuration, since the prerequisite for the rotating operation of the cylindrical body 49 is to be raised by the compression coil spring 53 in order to fix the support grease seal 47 at the upper position, the operation is ensured. It has the advantage of being

Additionally, on the outer periphery of the support grease seal 47,
A lower punch 54, which is a cylindrical member, is installed to surround the support grease seal 47, and the lower punch 54 restricts the bearing support housing 21 from descending.

Next, a method for assembling and manufacturing an indirect axle device using the jig configured as described above will be explained.

First, the bearing B is press-fitted into the housing 21.

In this step, the cam sector 48a formed on the support grease seal 47 and the cam sector 48b formed on the cam cylinder body 49 are placed in the position shown in FIG. Spring 5
The bearing B is positioned and placed above the cylindrical hole 36 of the housing 21 in a state where it can be lowered against the pressure 3. Thereafter, the press device is driven to press the upper press-fitting jig 20 and the lower press-fitting jig 22 so that they approach each other along their axes. That is, as shown in FIG.
4a come into contact with each other, and the upper bearing guide 24 covers the hole in the inner ring 34, thereby positioning the upper bearing guide 24. At the same time, the lower bearing guide 42 of the lower press-fitting jig 22 enters the inner circumferential portion of the lower inner ring 34 for so-called centering and positioning.

In this positioned state, the upper punch 30 of the upper press-fitting jig 20 contacts the upper end of the outer ring 32 of the bearing B, the upper punch grease sheet 25 contacts the upper end of the inner ring 34, and the lower press-fitting jig 22 The support grease seal 47 is attached to the inner ring 34.
The bearing B is press-fitted into the cylindrical hole 36 of the housing 21 while in contact with the lower end of the housing 21. During this press-fitting operation, a positioning process for temporary fixing of the collar 35 is executed. That is, as shown in FIG. 4, until the lower end of the outer ring 32 of the bearing B comes into contact with the support flange 38, the support grease seal 47 is applied to the end of the inner ring 34 by the compression coil spring 53. The lower bearing guide 42 can be inserted deeper into the inner ring 34 without applying an excessive load to the bearing B. As a result, the lower bearing guide 42 is moved to the collar 35.
is pushed upward, and the collar 35 stops in contact with the upper bearing guide 24.

Note that the biasing force of the compression coil spring 29 that biases the upper bearing guide 24 downward is equal to the biasing force of the compression coil spring 4 that biases the lower bearing guide 42 upward when the cam cylinder body 49 is in the position shown in FIG.
Since the biasing force is stronger than the biasing force of 6, the collar 35 that hits the upper bearing guide 24 will not be lifted up, and the collar 35 can be properly positioned.

After that, grease is press-fitted into the bearing B using a grease filling device (not shown). At this time, the hot grease seal 25 and the support grease seal 4 which touch the upper end of the pair of inner rings 34, 34 to the lower end
7 to prevent grease leakage.

After this step of positioning the collar 35, the press device is operated to separate the upper press-fitting jig 20 and the lower press-fitting jig 22 in the axial direction and return them to the standby position.

After this, the process of press-fitting the hub H into the inner ring 34 of the bearing B begins.

For this reason, by workers or work robots,
Oil seals 52, 52 at the top and bottom of bearing B
and a snap spring, and set the hub H in the proper position to fit into the inner ring 34 of the bearing B. At this time, as shown in FIG.
is at a predetermined position near the inner end above the inner ring 34 of the bearing B, so that the free end of the shaft rod portion 51 of the hub H is supported by the upper end surface of the collar 35, and the shaft rod portion 51 of the hub H is supported by the upper end surface of the collar 35. It is possible to easily position the inner ring 34 at a proper position where the axes of the inner ring 34 coincide with each other, and to temporarily fix the inner ring 34 so as to maintain the position. Furthermore, if the outer peripheral corner of the free end of the shaft rod portion 51 is chamfered, the shaft can be guided by the chamfer, thereby facilitating the positioning work for aligning the shaft center.

Note that in this specification, the members that are press-fitted into the inner ring of the bearing are collectively referred to as the shaft portion and the like.

In addition, in the lower press-fitting jig 22 that has been moved to the standby position to start this process, the cam cylinder body 49 is
The teeth are rotated by a predetermined angle from the meshable position shown in FIG. 6 to a separated position where the tooth ridges are in contact with each other and cannot mesh, and locked in that state. Further, the lower press-fitting jig 22 in this state is raised by a press device (not shown), and the support grease seal 47, which is locked at the upwardly protruding position as shown in FIG. Set it in a state where it comes into contact with the end face and supports it.

Next, the upper press-fitting jig 20 is lowered using a press device (not shown), and the shaft portion 51 of the hub H is press-fitted into the inner ring 34 of the bearing.

By this press-fitting operation, the collar 35 is inserted into the inner ring 3.
4 into the internal space of the support grease seal 47.

Also, along with the press-fitting, a pair of inner rings 34, 34
The force applied to the bearing B will be supported by the support grease seal 47, and no unreasonable force will be applied to the bearing B itself. Through the assembly manufacturing process described above, the operations of press-fitting the bearing B into the housing 21 and press-fitting the hub H into the bearing B are completed, and the indirect axle device as shown in FIG. 5 is completed.

[Effect of idea]

As described above in detail, according to the jig device for a bearing press fitting of the present invention, the support grease seal of the press fitting jig device is a cam cylinder having a cam sector, and can be selectively set to a state where it functions as a grease seal that prevents grease leakage from the bearing that abuts against and follows the inner ring, and a state where it functions as a fixed support member that supports the load on the inner ring.Therefore, by inserting this jig device into a single press machine and using it, it is possible to perform the work of pressing the outer ring portion of the bearing into the fixing hollow portion and the work of pressing a shaft rod portion or the like into the inner ring portion, thereby achieving the effect of simplifying and rationalizing the manufacturing equipment.

[Brief explanation of the drawing]

Fig. 1 is a partial cross-sectional front view of the main part to explain one embodiment of the jig device for a bearing press-fitting press machine of the present invention, Fig. 2 is an exploded partial cross-sectional front view of the main part, Figs. 3 and 4 are vertical cross-sectional views of the main part showing a part of the working process, Fig. 5 is a vertical cross-sectional front view of the indirect axle device when completed, Figs. 6 and 7 are perspective views showing the main mechanism used in carrying out the method, and Fig. 8 is a schematic front view explaining a conventional method. 20 ... upper press-fitting jig, 22 ... lower press-fitting jig, 24 ... upper bearing guide, 29 ...
Compression coil spring, 32: outer ring, 34: inner ring,
35: Collar; 42: Lower bearing guide; 46: Compression coil spring; 47: Support grease seal; 48a, 48b: Cam sector; 49:
...Cam barrel.

Claims (1)

[Claims for Utility Model Registration] (1) The bearing B is press-fitted into the cylindrical hole 36 of the housing 21 in the indirect axle of the car, which is installed in a press machine, and then the hub H is attached to the bearing B.
This is a jig for press-fitting the shaft portion 51, etc. of
The lower press-fitting jig 22 includes a bearing inner ring 34 that is spring-biased in the axial direction toward the upper press-fitting jig 20, and a support grease seal 47 for supporting the bearing inner ring 34.
, a stationary cam cylinder 49 disposed below the support grease seal 47, and a stationary cam cylinder 49 formed between the support grease seal 47 and the cam cylinder 49,
And these support grease seals 47 and cam cylinder body 4
9 and cam means for allowing a downward movement of the support grease seal 47 against said spring force on the one hand and preventing this downward movement on the other hand; A lower punch 54 is disposed on the outer periphery of the grease seal 47 and abuts against the housing 21 to prevent the housing 21 from descending. Press and support grease seal 47
It has an upper bearing guide 24 for press-fitting the bearing B into the cylindrical hole 36 of the housing 21 placed above, and the housing above the support grease seal 47 is allowed to move downward by the cam means. 21 cylindrical hole 3
The bearing B is press-fitted by the upper bearing guide 24 that descends into the bearing B, and the hub H is fitted into the inner ring 34 of the bearing B by the upper press-fitting jig 20 that descends while preventing the support grease seal 47 from descending by the cam means. A jig device for an indirect axle bearing and hub press-fitting press machine, which press-fits a shaft rod portion, etc. 51. (2) Utility Model Registration In the device according to claim 1, the cam means includes a tooth-shaped cam sector 48a provided at the lower end of the support grease seal 47, and a tooth-shaped cam sector 48a provided at the lower end of the support grease seal 47, and a rotational angle position of the cam cylinder body 49 according to the cam sector 48a. 48a and a tooth-shaped cam sector 48b provided at the upper end of the cam cylinder body 49, which is in an engaging position and an unengaged position.