JP4672332B2 - Track groove measuring device for outer ring of constant velocity joint and track groove measuring method for outer ring of constant velocity joint - Google Patents

Description

    The present invention relates to a track groove measuring device for an outer ring of a constant velocity joint for measuring the shape of a track groove of a torque transmitting ball formed on a constant velocity joint used for power transmission in automobiles and various industrial machines, and an outer ring of a constant velocity joint. The present invention relates to a track groove measuring method.

  Conventionally, the outer ring of a UJ (undercut-free) type constant velocity joint has been formed of a stem portion and a mouse portion. Further, an inner ring, a torque transmission ball, and a gauge for holding the torque transmission ball are provided inside the mouse portion. A plurality of track grooves for guiding the movement of the torque transmitting ball are formed in the inner surface of the mouse portion by grinding in the axial direction. The track groove was ground in an arc shape on the back surface side and linearly formed on the opening side of the mouse portion.

  This track groove is formed in a generally called Gothic arch shape, and is in angular contact with the torque transmission ball, and is made so that the valley of the track groove and the torque transmission ball do not come into contact with each other. It was.

  Therefore, the following has been proposed as a track groove measuring device.

  First, with the opening surface of the mouse part facing down, two arms having a probe at the end are inserted into the mouse from this opening, and the probe is brought into contact with the opposite track grooves. It has been proposed to determine by measuring the dimension between them (Patent Document 1).

Furthermore, with the opening surface of the mouse part facing down, a reference ball is arranged corresponding to each track groove formed in the inside of the mouse part, and this reference ball is supported by a ball receiver from the lower surface, and from the upper surface of the reference ball. By providing a guide surface for moving the reference ball to the track groove side, the diameter dimension of the virtual circle including the reference ball is measured based on the vertical position of the guide surface, and the ball receiver is moved up and down to (Patent Document 2) has been proposed in which the diameters at a plurality of points can be measured.
Japanese Patent Laid-Open No. 9-210605 JP 2001-165602 A

  However, Patent Document 1 and Patent Document 2 do not directly measure the distance VC (Vertical Clearance) between the trough of the track groove and the reference ball, so the contact between the track groove and the torque transmitting ball (angular contact). Regardless of the angle, the dimensions between the opposing grooves are measured, so the angle of the angular contact is unknown. Therefore, the contact surface pressure between the torque transmission ball and the track groove is increased, and the track transmission ball may slip, and it is considered that the constant velocity cannot be obtained.

  It is an object of the present invention to provide a track groove shape measuring device for an outer ring of a constant velocity joint and a method for measuring the track groove shape of an outer ring of a constant velocity joint, which can reliably measure the shape of the track groove.

The track groove measuring device for the outer ring of the constant velocity joint of the present invention is such that the cross section of the track groove (4) has a Gothic arch shape, and there is a gap between the torque transmitting ball and the trough (4c) of the track groove (4). A track groove measuring device (5) for the outer ring (1) of a constant velocity joint of the type
A reference ball (24) that comes into contact with the track groove (4) of the outer ring (1) placed on the upper surface (5a) of the apparatus with the opening face down ;
A measuring rod (9) that slidably penetrates the center of the reference ball (24) and contacts the valley (4c) of the track groove (4) , and
An operating rod (16) for converting the sliding movement of the measuring rod (9) into a rotational movement;
A measuring instrument (10) for measuring the distance (VC) from the reference ball (24) to the trough (4c) of the track groove (4) by converting the rotation state of the operating rod (16) into a linear movement;
The rotation mechanism for rotating the reference ball (24) about the center of curvature (O1) of the arc-shaped portion (4a) of the track groove (4) , the rotation mechanism,
A first support piece (12) attached to the device (5) so as to be rotatable about a horizontal support pin (P1);
A second support piece (13) having one end fixed to the lower end of the first support piece (12) and a measuring instrument (10) attached to the other end;
A third support piece (14) fixed to the first support piece (12) and rotatably supporting the operating rod (16) about a support pin (P2);
A fourth support piece (15) fixed to the second support piece (13) and connected to the link mechanism (17);
A connecting rod (19) connected to the link mechanism (17) at one end and an adjustment wheel (18) fixed to the outer wall (5b) at the other end.
The measuring rod (9) is attached to the first support piece (12), penetrates the reference ball (24) at one end and contacts the valley of the track groove, and at the other end. Contacting one end of the operating rod (16), the tip of the spindle (28) of the measuring instrument (10) is in contact with the other end of the operating rod (16), the support pin (P1) When the outer ring is placed on the device, the axis of the support pin (P1) passes through the center of curvature (O1) of the track groove (24) of the outer ring (1). ,
The reference ball (24) is moved in the longitudinal direction of the track groove (4) by the turning mechanism, and the measurement is performed at an arbitrary position in the longitudinal direction of the track groove (4). It is.
The measuring rod (9) , the operating rod (16) and the spindle (28) of the measuring instrument are always in contact with each other, and the measuring rod (9) is attached to the operating rod (16) of the track groove (4) . You may provide the elastic body (29) which gives the force moved to the trough (4c) side.

The method for measuring the track groove of the outer ring of the constant velocity joint of the present invention is such that the cross section of the track groove (4) has a Gothic arch shape, and a gap is formed between the torque transmission ball and the trough (4c) of the track groove (4). The outer ring (1) is placed on the upper surface (5a) of the device with the opening face down, and the reference ball (24 ) is placed in the track groove (4). ) place, track the reference ball (24) pushed into the valley (4c) direction of the track grooves (4), in a state where the reference ball (24) is in contact with the track grooves (24), the reference ball (24) The distance (VC) to the valley (4c) of the groove (4) is measured, and the contact position of the reference ball (24) and the track groove (4) is shifted in the longitudinal direction of the track groove (4) to be one which is adapted to measure the distance to the valley (4c) of the groove (4) the longitudinal direction of the reference ball at a plurality of positions (24) from the track grooves (4) of the (VC), Turning mechanism using Upon shifting the contact position of the semi-ball and the track grooves in a longitudinal direction of the track groove,
A first support piece (12) attached to the device (5) so as to be rotatable about a horizontal support pin (P1);
A second support piece (13) having one end fixed to the lower end of the first support piece (12) and a measuring instrument (10) attached to the other end;
A third support piece (14) fixed to the first support piece (12) and rotatably supporting the operating rod (16) about a support pin (P2);
A fourth support piece (15) fixed to the second support piece (13) and connected to the link mechanism (17);
A connecting rod (19) connected to the link mechanism (17) at one end and an adjustment wheel (18) fixed to the outer wall (5b) at the other end.
The measuring rod (9) is attached to the first support piece (12), penetrates the reference ball (24) at one end and contacts the valley of the track groove, and at the other end. Contacting one end of the operating rod (16), the tip of the spindle (28) of the measuring instrument (10) is in contact with the other end of the operating rod (16), the support pin (P1) And the measuring rod (9) are orthogonal to each other, and when the outer ring is placed on the apparatus, the axis of the support pin (P1) passes through the center of curvature (O1) of the track groove (24) of the outer ring (1). It is characterized by this.

When measuring the track groove of the outer ring of a constant velocity joint of the type in which the cross section of the track groove has a Gothic arch shape and there is a gap between the torque transmission ball and the valley of the track groove, the reference ball is used in the track groove. By measuring the distance from the reference ball to the trough of the track groove (gap VC: see FIG. 8), the finishing state of the cross-sectional shape of the track groove can be confirmed. For example, in the case of a track groove having a cross section of a Gothic arch, the gap VC is large when the Gothic arch is tight, and conversely, when the Gothic arch is loose, the gap VC is small. Therefore, based on measurements of the clearance VC, Ru can predict the state of the angular contact between the torque transmitting balls and the track grooves.
Further, the reference ball is moved in the longitudinal direction of the track groove by a turning mechanism for turning the reference ball about the center of curvature of the track groove, and the measurement is performed at a plurality of positions in the longitudinal direction of the track groove. Therefore, it is possible to measure the cross-sectional shape at an arbitrary position of the arc-shaped track groove.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS.

An outer ring 1 of a constant velocity joint of UJ (undercut free) type is formed of a stem portion 2 and a mouse portion 3 as shown in FIGS. This is the inside of the mouth portion 3 is not shown, the inner ring, the torque transmitting balls, the cage of the torque transmitting balls are accommodated.

  A track groove 4 for receiving a torque transmitting ball is formed on the inner surface of the mouse portion 3. The track groove 4 has an arcuate portion 4a having a center of curvature O1 on the back surface side of the mouse portion 3 and an axis of the mouse portion 3 with a line segment extending rearward from the center of curvature O1 intersecting the valley of the track. A straight portion 4b parallel to the direction.

  Next, a measuring device for the track groove 4 of the outer ring 1 will be described with reference to FIGS.

As shown in FIGS. 6 and 7, the track groove measuring device 5 is formed with a through hole 6 extending in the longitudinal direction on the upper surface 5 a and a pair of mounting recesses 7 provided in the middle of the through hole 6. ing. An attachment leg 8 is attached to the attachment recess 7. Attachment leg 8, Ri Do a pair of brackets having a substantially L-shape, by installing a portion 8a which corresponds to the horizontal portion of the L-shaped in the mounting recess 7 is bolted N as shown by the broken line, the vertical L-shaped Oh Ru erected in a state where a portion 8b were opposed to hitting the part. A support piece 12 is attached to the vertical portion 8b via a pin P1, and the support piece 12 can pivot about the pin P1.

As shown in FIG. 3, which is a cross section orthogonal to FIG. 6 , the support piece 12 and further support pieces 13, 14, 15 constitute a single support as a whole. A measuring rod 9 is attached to the support piece 12. A measuring instrument 10 is attached to the support piece 13. Further, the support piece 13 and the support piece 15 are formed integrally with each other. A measuring rod 16 is attached to the support piece 14 via a pin P2.

The first support piece 12, the upper end extending in the vertical direction is protruded from the through hole 6 of the upper surface 5a upward, pivotally mounted to the upper end by the support pins P 1 to the vertical portion 8b of the mounting leg 8 The measuring rod 9 is attached to the upper end in the horizontal direction.

The second support piece 13 is shorter than the length of the first support piece 12 in the vertical direction and is substantially L-shaped, and the end of the horizontal portion 13 a is bolted to the lower end of the first support piece 12. It is fixed with N. And the vertical part 13b of the 2nd support piece 13 has attached the measuring device 10 to a horizontal direction (refer FIG. 3).

A bifurcated third support piece 14 is integrally formed in the middle of the first support piece 12 and extends to the vertical portion 13b side of the second support piece 13. An operating rod 16 extending in the vertical direction is rotatably attached to the bifurcated portion of the third support piece 14 by a support pin P2 .

The fourth support piece 15 protrudes downward from the horizontal portion 13 a of the second support piece 13, and is connected to an adjustment wheel 18 attached to the outer wall 5 b of the track groove measuring device 5 via the link mechanism 17. ing. The connecting position between the link mechanism 17 and the fourth support piece 15, are preferred not to the second support piece 13 than the support position by the supporting pins P1 of the first support piece 12.

It is very important that this position is shifted. When the adjustment wheel 18 is turned, the connecting rod 19 of the link mechanism 17 is moved to the left in FIG. At this time about the support pins P 1 supporting the upper end of the first supporting piece 12, the entire support (12, 13, 14, 15) is shown in FIG. 4 rotates. As shown in FIG. 4, the rotation center at this time, that is, the support pin P1, coincides with the curvature center O1 of the arc-shaped portion 4a of the track groove 4 described with reference to FIG.

In addition, an indicator rod 21 extending from the middle of the first support piece 12 to an arcuate hole 20 formed on the side wall of the outer wall 5b of the track groove measuring device 5 is attached. An angle display scale 22 is attached to the lower surface of the arcuate hole 20, and the support (12, 13, 14, 15) is composed of a triangular mark 21 a and an angle display scale 22 provided at the tip of the pointing bar 21. ) Can be read (see FIGS. 5 and 6).

Wherein the upper surface 5a of the track groove measuring device 5, table 23 for location fixed stacking the opening surface side of the mouth portion 3 of the outer ring 1 and the bottom are provided in the hollow. The reason for the hollow shape is to enable the upper end of the first support piece 12 to be positioned in the inner direction of the mouse portion 3.

A reference ball 24 having the same shape as a torque transmission ball (not shown) is attached to the upper end side of the first support piece 12. The center of the reference ball 24 have through holes 25 are formed to penetrate, the support pin is matched with the center of the P 1 Ru Oh mounted horizontally in FIG.

The measuring rod 9 can slide horizontally through the through hole 25 of the reference ball 24 and the support hole 26 continuous with the through hole 25 of the reference ball 24 at the upper end of the first support piece 12. Is arranged. The measuring rod 9 has a rod shape, and both ends thereof are spherical surfaces 9 a and 9 b, one of which is in contact with the valley 4 c of the track groove 4 and the other is in contact with the upper end of the operating rod 16. The measuring rod 9 is urged toward the valley 4c side of the track groove 4 by an elastic body 27 made of a spring or the like (see FIG. 3).

  The measuring instrument 10 may be a general one called a dial gauge that measures the length, and it is only necessary to measure a length of 10 mm. The measuring instrument 10 is mounted horizontally (see FIG. 3) on the vertical surface 13b of the second support piece 13 as described above, and the tip of the spindle 28 is brought into contact with the lower end of the operating rod 16. .

  The operating rod 16 has its lower end pressed by an elastic body 29 such as a spring in order to move the measuring rod 9 toward the valley 4c side of the track groove 4 in the state of FIG. The elastic body 29 is fitted and held in grooves 30 and 31 formed in the operating rod 16 and the first support piece 12.

  Further, the position of the support pin P that rotatably supports the first support piece 12 is that the outer ring 1 is a UJ type constant velocity joint, and therefore, the linear portion 4b of the track groove 4 to the arcuate portion 4a. The change point is set, and the support 11 is turned to be the same center point as the center of the arcuate portion 4 a of the track groove 4.

  Next, the measurement of the distance between the track groove valley and the reference ball will be described.

  The outer ring 1 of the constant velocity joint is placed on the table 23. At this time, the opening surface of the mouse part 3 is set downward.

By installing the outer ring 1, the reference ball 24 hits along the track groove 4, but since the track groove 4 is formed in a Gothic arch shape, the contact between the reference ball 24 and the track groove 4 becomes an angular contact . The Therefore, no contact as shown in FIG. 8 is a valley 4c reference ball 24 and the track groove 4. In FIG. 8, the distance from the reference ball 24 to the valley 4c is shown as a gap VC (Vertical Clearance).

Therefore, if this gap VC is measured , the diameter of the reference ball 24 has been determined, so it can be confirmed whether the track groove 4 has been correctly ground. This measurement, since the pushing force always measured rod 9 on operating rod 16 of the track groove 4 to the valley 4c side is gills pressurized, the display of the instrument 10 when the movement of the actuating rod 16 is stably stopped the readings taken Bayoi.

  If the gothic arch of the track groove 4 is tight, the gap becomes large, so that the measuring rod 9 in FIG. 3 moves further to the left. As a result, the operating rod 16 moves counterclockwise, and the spindle 28 also moves and the distance of the gap VC can be read by the dial gauge which is the measuring instrument 10. Further, when the Gothic arch of the track groove 4 is loose, the gap becomes small, so that the measuring rod 9 in FIG. 3 moves further to the right. As a result, the operating rod 16 moves clockwise, and the spindle 28 The distance VC can be read with the dial gauge which is the measuring instrument 10.

Here, as is clear from the comparison between FIG. 3 and FIG. 4, the support (12, 13, 14, 15) to which the measuring rod 9 and the measuring instrument 10 are attached is relative to each support piece 12, 13, 14, 15. since there is no breaking the positional relationship, it will not break the flat row relationship of the measuring rod 9 with the instrument 10. Therefore, an error is unlikely to occur in the measurement of the gap between the V C.

Next, when the adjusting wheel 18 is turned and the connecting rod 19 is moved to the left in FIG. 3, the support mechanism (12, 13, 14, 15) is moved clockwise with respect to the support pin P by the link mechanism 17 in FIG. Rotate. Rotation angle watches angle indicator scale 22, taken reads the value of the gap VC in the instrument 10, for example, stopping at two points of 15 ° and 30 ° Bayoi. At this time, the measuring rod 9 and the measuring instrument 10 do not change the relative positional relationship (see FIG. 4 ), and the positional relationship between the measuring rod 9 and the measuring instrument 10 is maintained regardless of the angle at the measuring point. The measuring rod 9 can always be applied in the normal direction to the track groove 4 and there is no reading error.

  Moreover, what is necessary is just to replace and measure the track groove 4 of the mouse | mouth part 3, when measuring the other track groove 4. FIG.

As described above, by changing the angle of the support (12, 13, 14, 15) , it becomes possible to measure the cross-sectional shape of the arcuate portion 4a of the track groove 4 at an arbitrary longitudinal position , and grinding can be performed easily. The situation can be judged. Further, based on the measurement result of the clearance VC, since the torque transmitting balls and the inner ring and the like can be predicted behavior of the track grooves of the torque transmitting balls when incorporated in mouth portion, whether it is necessary to further grinding of the track groove Can be determined.

Although the embodiment has been described with a UJ type constant velocity joint, it is obvious that a fixed type constant velocity joint without the straight portion 4b of the track groove 4 may be used.

It is sectional drawing of the outer ring | wheel of the UJ type constant velocity joint of this invention. It is the side view which looked at the outer ring | wheel of the UJ type constant velocity joint of this invention from the opening surface side. It is a cross-sectional schematic diagram explaining the track groove measuring apparatus of this invention. It is a schematic diagram explaining the operation state of the support body equivalent to FIG. It is a schematic diagram which shows the operating angle of the support body equivalent to FIG. FIG. 4 is a schematic front view of FIG. 3. It is the schematic diagram seen from the upper surface explaining the track groove measuring apparatus of this invention. It is a schematic diagram which shows the relationship between a track groove and a reference | standard ball.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Outer ring 2 Stem part 3 Mouse part 4 Track groove 4a Arc-shaped part 4b Straight line part 4c Valley 5 Track groove measuring device 5a Upper surface 5b Outer wall 7 Mounting recess 8 Mounting leg 8a Vertical part 8b Horizontal part 9 Measuring rod 9a, 9b Spherical surface 10 Measurement Vessel 12, 13, 14, 15 Support piece 13a Horizontal portion 13b Vertical portion 16 Actuation rod 17 Link mechanism 18 Adjusting wheel 21 Indicator rod 24 Reference ball 25 Through hole 26 Support hole 27 Elastic body 29 Elastic body N Bolt P1 , P2 support Pin VC gap

Claims (3)

The track of the outer ring (1) of the constant velocity joint of the type in which the cross section of the track groove (4) has a Gothic arch shape and there is a gap between the torque transmission ball and the valley (4c) of the track groove (4) A groove measuring device (5) ,
A reference ball (24) that comes into contact with the track groove (4) of the outer ring (1) placed on the upper surface (5a) of the apparatus with the opening face down ;
A measuring rod (9) that slidably penetrates the center of the reference ball (24) and contacts the valley (4c) of the track groove (4) , and
An operating rod (16) for converting the sliding movement of the measuring rod (9) into a rotational movement;
A measuring instrument (10) for measuring the distance (VC) from the reference ball (24) to the trough (4c) of the track groove (4) by converting the rotation state of the operating rod (16) into a linear movement;
The rotation mechanism for rotating the reference ball (24) about the center of curvature (O1) of the arc-shaped portion (4a) of the track groove (4) , the rotation mechanism,
A first support piece (12) attached to the device (5) so as to be rotatable about a horizontal support pin (P1);
A second support piece (13) having one end fixed to the lower end of the first support piece (12) and a measuring instrument (10) attached to the other end;
A third support piece (14) fixed to the first support piece (12) and rotatably supporting the operating rod (16) about a support pin (P2);
A fourth support piece (15) fixed to the second support piece (13) and connected to the link mechanism (17);
A connecting rod (19) connected to the link mechanism (17) at one end and an adjustment wheel (18) fixed to the outer wall (5b) at the other end.
The measuring rod (9) is attached to the first support piece (12), penetrates the reference ball (24) at one end and contacts the valley of the track groove, and at the other end. Contacting one end of the operating rod (16), the tip of the spindle (28) of the measuring instrument (10) is in contact with the other end of the operating rod (16), the support pin (P1) And the measuring rod (9) are orthogonal to each other, and the axis of the support pin (P1) is the center of curvature (O1) of the track groove (24) of the outer ring (1) placed on the upper surface (5a) of the apparatus. Street,
The reference ball (24) is moved in the longitudinal direction of the track groove (4) by the turning mechanism, and the measurement is performed at an arbitrary position in the longitudinal direction of the track groove (4) , etc. Track groove measuring device for outer ring of high speed joint. Together with the the measurement rod and the actuating rod and the instrument is always in abutment, according to claim 1, wherein the digits set the elastic body to provide a force for moving the measuring rod in the track grooves to the valley side to the operating rod For measuring the track groove of the outer ring of a constant velocity joint. Method for measuring track groove of outer ring of constant velocity joint of type in which cross section of track groove (4) is Gothic arch shape and there is a gap between torque transmission ball and valley (4c) of track groove (4) a it is, mounted on the outer ring (1) to the open side facing down device top surface (5a), arranged a reference ball (24) in the track grooves (4), the track groove the reference ball (24) ( 4) push the valley (4c) direction, in a state where the reference ball (24) is in contact with the track grooves (24), the distance from the reference ball (24) to the valley of the track grooves (4) (4c) (VC) while measuring, the reference abutment position of the ball (24) and the track grooves (4) are shifted in the longitudinal direction of the track grooves (4), the reference ball (24 in the longitudinal direction of the plurality of positions of the track grooves (4) ) from be one which is adapted to measure the distance (VC) to the valley (4c) of the track grooves (4), the longitudinal direction of the track groove the contact position of the reference ball and the track groove Pivoting mechanism used Upon shifting to,
A first support piece (12) attached to the device (5) so as to be rotatable about a horizontal support pin (P1);
A second support piece (13) having one end fixed to the lower end of the first support piece (12) and a measuring instrument (10) attached to the other end;
A third support piece (14) fixed to the first support piece (12) and rotatably supporting the operating rod (16) about a support pin (P2);
A fourth support piece (15) fixed to the second support piece (13) and connected to the link mechanism (17);
A connecting rod (19) connected to the link mechanism (17) at one end and an adjustment wheel (18) fixed to the outer wall (5b) at the other end.
The measuring rod (9) is attached to the first support piece (12), penetrates the reference ball (24) at one end and contacts the valley of the track groove, and at the other end. Contacting one end of the operating rod (16), the tip of the spindle (28) of the measuring instrument (10) is in contact with the other end of the operating rod (16), the support pin (P1) And the measuring rod (9) are orthogonal to each other, and when the outer ring is placed on the apparatus, the axis of the support pin (P1) passes through the center of curvature (O1) of the track groove (24) of the outer ring (1). A method for measuring a track groove of an outer ring of a constant velocity joint.

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