JPS6124729Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a holding device used when forming a window hole in a ball holder for a constant velocity universal joint, which is a vehicle component.

A ball holder 1 for a constant velocity universal joint usually has a shape as shown in FIG. 5 is provided.
Both wall surfaces 6, 7 of the window hole 5 are formed using a grindstone or the like, and this forming has conventionally been carried out as follows.

In other words, when producing in small quantities,
As shown in C, after cutting one side 6 of the window hole 5, the cutting tool 8 was moved to process the opposite side 7. However, in this case, the movement of the cutting tool was done based on the operator's intuition, which resulted in a lack of accuracy, and there was also the disadvantage that it was not possible to save labor because a person had to follow along during the work.

For mass production, the mounting shaft 9 is rotated in the forward and reverse directions as shown in FIG. They were being processed at the same time. However, in this case, there were some difficulties in adjusting the position and dimensions of the cutting tool.

Furthermore, as another processing method for mass production, as shown in FIG.
There were some that had ... and linked six axes,
There was difficulty in uniformly adjusting the dimensions of the six axes.

In order to overcome the difficulties in machining accuracy and ease of machining with conventional machining equipment, this invention enables machining of both walls of the window hole by fixing only twice: once and when inverted. This is a constant-velocity joint that has the same processing reference planes for the inner and outer spherical surfaces and both wall surfaces of the window hole, and improves the accuracy of the concentricity between the inner and outer spherical centers and the wall surfaces of the window hole, and the flatness of multiple wall surfaces of the window hole. It is an object of the present invention to provide a holding device for forming apertures in a ball holder for use.

An apparatus according to an embodiment of the present invention will be described below with reference to the drawings.

In FIG. 5, reference numeral 13 indicates a holding device member for holding the ball holder 1 for a constant velocity universal joint, which is a thick-walled cylindrical member having an annular groove 14 for accommodating the ball holder 1. It has an opening 15 bored from the outer peripheral surface to the annular groove 14 at a position corresponding to the window hole 5 of the ball holder 1. The reference surfaces of the ball retainer 1 for a constant velocity universal joint are its outer spherical surface 2 and both end surfaces 3 and 4. The ball holder 1 is accommodated in the annular groove 14 while being in contact with the bottom surface 17 of the groove 14 . Rear annular groove 14 in which ball retainer 1 is housed
is covered by a fixing plate 18, and by fastening with bolts 19 with one side of the fixing plate 18 in contact with the end surface 4 of the ball holder 1, the ball holder 1
is fixed in the retainer member 13. Both end surfaces 20 and 21 of the holding device member 13 are formed in planes perpendicular to the axis of the holding device member 13.
0 and 21 have pin holes 2 extending parallel to the axis.
2 and 23 are formed.

FIG. 6 shows the attachment of the holding device member 12 containing the ball holder 1 for a constant velocity universal joint to the main shaft 24 of the molding machine. The molding machine main shaft 24 has a shaft portion 26 that is fitted into the central hole 25 of the holding device member 13 and a flange 27 that contacts one of the end surfaces 20 and 21 of the holding device member 13. A pin hole 28 is provided in the flange 27, and by fitting a reference pin 29 into this pin hole 28 and the pin hole 22 or 23 of the holding device member 13, the molding machine main shaft 2
4 and the holding device member 13 are positioned. The shaft portion 26 of the main shaft 24 of the molding machine is provided with a screw hole 30, and a plate-shaped tightening plate 3 with a hole in the center is provided.
1 to the end surface 20 or 21 of the holding device member 13 and fastening with bolts 32, the holding device member 13 is fixed between the clamping plate 31 and the flange 27 of the molding machine main shaft 24. In addition, 33 is a main bearing, and the molding machine main shaft 24 is supported so that it can rotate in forward and reverse directions around its axis.

Next, the effect will be explained. The ball holder 1 for a constant velocity universal joint is aligned in the annular groove 14 using the outer spherical surface 2 and the reference planes of the end faces 3 and 4, and the holding device member opening 15 and the ball holder window hole 5 are aligned.
Match them, position them in the circumferential direction, and store and fix them. The holding device member 13 is attached to the main shaft 24 of the molding machine, the tightening plate 31 is applied, and the bolt 32 is tightened.
Next, as shown in FIG. 7, the cutter 35 attached to the cutter attachment main shaft 34 is inserted through the opening 15 into the ball holder window hole 5 and brought into contact with one wall surface 5. The cutting tool 35 rotates around its axis, and the holding device member 13 attached to the main shaft 24 of the molding machine rotates by α degrees shown in the figure, so that the wall surface 6 of the window hole 5 is rotated.
is formed. Wall surfaces 6 of other window holes 5 are formed in the same manner.

Next, remove the bolts 32 and the tightening plate 31, remove the holding device member 13 from the molding machine main shaft 24, and turn it over.
That is, until now the end face 20 was in contact with the flange 27, but now it is reversed so that the end face 21 is in contact with the flange 27, and in this reversed state, the holding device member 13 is attached to the molding machine main shaft 24, and tightened. Board 31
is fixed to the dowel bolt 32. If the cutting tool 35 is applied again here, it will hit the wall surface 7 opposite to the wall surface 6 of the window hole 5, and the wall surface 7 will be formed.

Since the device of the present invention has the above-described structure and operation, the following various effects can be obtained when the device is according to the present invention.

In other words, both walls of the window hole can be formed by fixing both the holding device member once and when it is inverted, and furthermore, if the cutting tool is adjusted when it is fixed once, there is no need for adjustment after it is inverted. Workability can be improved.

In addition, since the same outer spherical circumferential surface and end surface of the ball retainer for constant velocity universal joint are incorporated into the retainer member as reference surfaces, and this is reversed and processed,
Both wall surfaces can be machined with the same precision; in other words, if the cutting tool is adjusted so that one wall surface can be machined with high precision, the other wall surface can also be machined with high precision simply by reversing the cutting tool. Therefore, a good ball guiding wall surface can be provided.

Furthermore, FIGS.
If the measurement reference points shown with numbers 36 and 37 are provided in the figure, the quality of the window hole molding can be checked simply and easily by comparing the positions of both walls of the window hole with the measurement reference points. be able to.

[Brief explanation of the drawing]

FIG. 1A is a longitudinal sectional view of a ball holder for a constant velocity universal joint, which is a molded product. FIG. 1B is a cross-sectional view of FIG. 1A. FIGS. 2A, 2B, and 2C show the form of molding by a conventional molding device, in which A is a cross-sectional view of the device, B is a side view of A, and C is a schematic diagram showing the processing order. FIGS. 3A and 3B show a configuration using another conventional molding apparatus, in which A is a longitudinal sectional view of the apparatus, and FIG. 3B is a cross-sectional view of A. FIGS. 4A and 4B show a molding mode using yet another conventional molding apparatus, in which A is a longitudinal cross-sectional view of the apparatus and B is a cross-sectional view of A. FIG. 5 is a longitudinal cross-sectional view of a holding device member according to the present invention that accommodates a ball holder for a constant velocity universal joint. FIG. 6 is a longitudinal sectional view of the holding device member according to the present invention when it is attached to the main shaft of the molding machine. FIG. 7 is a cross-sectional view of an apparatus according to the present invention during window hole formation using a cutting tool. DESCRIPTION OF SYMBOLS 1... Ball retainer for constant velocity universal joint, 2... Outer spherical surface, 3, 4... End face, 5... Window hole, 6, 7...
... Wall surface, 13 ... Holding device member, 14 ... Annular groove, 15 ... Opening, 18 ... Fixing plate, 19 ... Bolt, 24 ... Molding machine main shaft, 26 ... Shaft part, 27
...Flange, 29 ... Reference pin, 31 ... Tightening plate, 32 ... Bolt, 33 ... Main bearing.

Claims (1)

[Claims for Utility Model Registration] A ball retainer for a constant velocity universal joint is made up of a thick-walled cylindrical body having an annular groove for accommodating its outer spherical circumferential surface and both end surfaces as processing reference surfaces. A holding device member having an opening extending from the outer peripheral surface of the cylindrical body to the annular groove at a position corresponding to the window hole of the ball holder for a universal joint, and a shaft portion fitted into the central hole of the holding device member. A molding machine main shaft positioned in the circumferential direction and in contact with one end surface of the holding device member; and a tightening plate attached to the shaft portion of the molding machine main shaft to tighten the holding device member. Holding device for forming window holes in ball holders.