JPS6024530Y2 - Constant velocity joint member phasing device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a device for phasing a cross-groove type constant velocity joint member with respect to the main axis of a processing device.

The cross-groove type constant velocity joint is published by Special Publication No. 38-11203.
As shown in the above publication, six ball grooves having different inclination angles with respect to the axis are alternately formed in the outer ring and the inner ring as such a constant velocity joint member.

Among these ball grooves, a pair of ball grooves that correspond to each other across the axis line have opposite inclination directions with respect to the generatrix of the cylindrical surface, but their ball groove center lines are parallel to each other, and both ball grooves are parallel to each other. The centerline is included in a plane that has a constant inclination with respect to the axis of the joint member.

That is, both ball grooves have the same inclination with respect to a plane passing through the spindle axis, and the phase of the joint member can be determined by inserting a reference engagement member along these ball grooves.

Since the insertion direction of the reference member also coincides with the insertion direction of the processing tool, it is necessary to place the reference member at a position where it does not interfere with the processing tool during processing.

For this reason, conventionally, as a guide means for a phase determining reference member, not only is it necessary to have a linear guide means along the direction of the ball groove, and also a guide means movable in a direction perpendicular to this direction. It was also necessary to provide a plurality of drive means for moving in the guiding direction.

This complicates the structure, increases the number of components and control equipment, and increases costs.Furthermore, since the positioning is performed separately using multiple guide means, the position of the reference member tends to vary, making it difficult to improve the phasing accuracy. there were.

In order to eliminate such conventional drawbacks, the present invention moves the reference member that engages with the ball groove in an arc, thereby providing engagement and disengagement in the direction along the ball groove and release action to the non-interference area with respect to the processing tool. It is designed to make the user perform the following steps.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows the structure of a headstock 10 that indexably supports a main shaft 11 to which an outer ring W1 as a joint member is fixed to one end in order to machine a ball groove. A rotating member 12 for phasing W1 is rotatably supported via a pivot 15 on a support bracket 14 fixed to the upper surface of the headstock main body 13, and a protruding lever 27 protrudes from the rotating member 12. The piston rod 29 of the cylinder 28 is pivotally supported on the support bracket 14.
is pivoted.

A reference pin 16 that engages with the ball groove is provided at the tip of the rotating member 12.

The pivot 15 passes through an intersection point Q between a plane P including the center lines of the pair of ball grooves to be phased and the center line S of the main shaft 11, and is perpendicular to the perpendicular line perpendicular to the plane P, and is also perpendicular to the main shaft axis S. It has become.

Therefore, the rotating member 12 is rotatable in a plane passing through the main shaft axis S by the operation of the cylinder 2B, and this rotating member 1
The reference pin 16 held at 2 moves on an arcuate trajectory that approximately coincides with the center line of the ball groove when engaged with the ball groove.

In addition, when the ball is disengaged from the ball groove, it can be moved away from the center line of the ball groove along an arcuate trajectory to a region where it does not interfere with a processing tool, which will be described later.

The outer end of the reference pin 16 has a spherical surface that matches the arc of the ball groove or has a radius larger than the radius of the ball groove, and the inner end tapers toward the tip as shown in FIG. Tapered portion 16a.

16a is formed, and its intermediate shaft portion 16b is connected to the rotating member 12.
It is fitted into a through hole 12a that is bored in the shaft and parallel to the pivot shaft 15, and is held movably in the axial direction.

An annular groove 16c is formed in a part of the shaft portion 16b, and the tip of the pin 17 is inserted into the annular groove 16c with a gap to prevent the reference pin 16 from being pulled out.

an operating shaft 18 that is orthogonal to the reference pin 16 and has a tapered portion 18a that engages with the tapered portions 16a that face each other;
is guided by the rotating member 12, and this operating shaft 18 is connected to the piston throat 21 of the cylinder 20.

When the actuating shaft 18 is moved forward by a small amount using the cylinder 20, the reference pins 16 are mutually projected outward due to the action of each tapered portion 16a, 16a, 18a, and come into contact with the ball groove, causing the center of the ball groove to be biased. If so, it will be corrected and the phase of the outer ring W1 will be determined.

After the phase has been determined, the outer ring W1 is clamped by a bolt 22 screwed into the end face of the main shaft.

Further, when the actuating shaft 18 is moved backward, the engagement at the tapered portion 18a is released, and each reference pin 16 becomes in a state where it can be retracted inward.

The retractable amount should be larger than the maximum amount of deviation between the arcuate locus of the reference pin 16 and the ball groove centerline due to the rotation of the rotating member 12, and thereby prevent mismatch between the arcuate locus and the ball groove centerline. portion is absorbed.

The headstock body 13 is placed on a sliding base 26 that is slidably guided by a guide base 25, and the main spindle 11 is supported on the headstock body 13 along the sliding direction of the sliding base 26. ,
The axis of the main shaft 11 of the bracket is the guide plane 2 of the guide base 25.
5a is inclined at an angle equal to the angle of inclination θ with respect to the axis of the ball groove.

A rotary indexing mechanism 30 is attached to the main spindle 13 and the headstock main body 13.
is provided.

This rotary indexing mechanism includes indexing plates 31 and 32 made up of a pair of coupling gears, a rotary drive device made up of a rack 34 and a rack drive cylinder 35 that mesh with a pinion 33 at one end of the main shaft 11, and a left end of the headstock main body 13. A cylinder 36 formed concentrically with the main shaft 11 and this cylinder 36
The index plate 31, 32 consists of a piston 37 which is fitted into the main shaft 11 and connected to the main shaft 11.

A piston rod 39 of a cylinder 38 fixed to the guide base 25 is connected to the sliding table 26 .

A grindstone shaft serving as a processing tool is parallel to the guide surface 25a, and is configured to make a cut in a direction perpendicular to the paper plane of FIG.

Therefore, by sliding the slide table 26 from a state where the pre-machined ball groove has been cut by a predetermined amount, the ball groove can be ground at the inclination angle θ.

When the joint member to be machined next has the inner ring W2, the ball groove G is formed on the outer circumferential surface, so the reference pin 16 that engages with the ball groove is also arranged with the inside and outside reversed compared to the above embodiment. Must.

For this purpose, as shown in FIG.
A+42b has a through hole 43 on the same line parallel to the pivot 15
are bored, and the reference pins 46 are inserted facing inward, and the outer ends are connected to the piston rods 45 of the cylinder 44, respectively.

Although the position of the pivot shaft 15 in the above embodiment was provided on the perpendicular line passing through the intersection Q, the position is not limited to this.

For example, as shown in FIG.
If the pivot shaft 15 is provided on the perpendicular line 1 passing through the equal dividing point O and perpendicular to the plane P, the amount of deviation between the arc locus of the reference pin 16.46 and the ball groove center line can be further reduced.

It is also effective to provide the pivot 15 on a perpendicular line passing near the intersection Q in this way.

As described above, according to the present invention, the rotating members 12 and 42 holding the reference pin that engages with the ball groove are pivotably supported about the pivot shaft 15, and the center of the reference pin is in the ball groove. Since it moves in an arcuate trajectory along the center line, it is possible to engage and disengage the reference pin that determines the phase of the ball groove, and to provide relief to the area that does not interfere with the processing tool using only the swing motion. This has the effect of simplifying the configuration and increasing the phase determination accuracy.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention. Fig. 1 is a vertical sectional view showing the overall structure of the headstock, Fig. 2 is a partial sectional view taken in the direction of the ■ arrow in Fig. 1, and Fig. 3 is a phase diagram for the inner ring. A diagram corresponding to FIG. 2 showing the determining device, and FIG. 4 are side views thereof. 11...Main shaft, 12.42... Rotating member, 13... Headstock body, 15... Pivot, 16, 46...・Reference pin, 25...
・Guidance base, 26...Sliding stand, 30...
... Rotating index mechanism, 31, 32... Index plate.

Claims (1)

[Scope of utility model registration request] The main shaft of a processing device is used to cut pre-machined ball grooves in the outer ring or inner ring of a constant velocity joint in which the ball grooves formed on the inner circumferential surface of the outer ring and the ball grooves formed on the outer circumferential surface of the inner ring intersect at different angles to each other. A perpendicular line passing through the vicinity of the intersection of the spindle axis and a plane including a pair of ball groove center lines formed at symmetrical positions across the spindle axis line and perpendicular to the plane; providing a spindle that is perpendicular to the spindle axis on a spindle that supports the spindle;
A rotating member is provided which is pivotally supported by this pivot and can rotate within a plane passing through the main shaft axis, and the tip of this rotating member engages with the pair of ball grooves of the outer ring or the pair of ball grooves of the inner ring. A constant velocity ball joint, characterized in that a pair of reference pins having spherical ends are held on an axis parallel to the pivot, and an advancing/retracting device is provided for moving the pair of reference pins back and forth in the axial direction. Part phasing device.