JP2011237252A - Axial backlash measuring device for spline fitting component - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an axial backlash measuring device for a spline fitting component capable of stably and accurately measuring an axial backlash.SOLUTION: The axial backlash measuring device for a spline fitting component includes: a work mounting device 2 for mounting a spline fitting component 20 with one end thereof facing downward, the spline fitting component 20 being arranged in such a way that an inner circumferential part of an external cylindrical member 22 is spline-fitted to an outer circumferential part of an internal cylindrical member 21 so as to be movable in an axial direction; a work pressing device 3 for pressing the internal cylindrical member 21 on the work mounting device 2; a lifting device 6 with a wedge actuator 5 having a wedge 4 and driving the wedge 4 in an inserting/extracting direction, the wedge 4 being inserted between the work mounting device 2 and the external cylindrical member 22 so as to lift a part of a circumferential direction of the external cylindrical member 22; and a measuring part 7 for measuring an amount of movement of the external cylindrical member 22 lifted by the lifting device 6.

Description

  The present invention relates to a spline fitting component such as a sleeve and a hub used in a transmission speed change mechanism, and more particularly to an axial backlash measuring device for measuring an axial backlash of a spline fitting component.

  A spline fitting component such as a sleeve and a hub used in a transmission speed change mechanism needs to have an axial backlash (axial backlash) of the sleeve with respect to the hub within a predetermined range. For this reason, the axial backlash measurement of spline fitting parts is performed manually using a dial gauge. Specifically, one of the sleeves in the diameter direction is pressed downward with a finger and the other is lifted upward with a finger, and the height at which the sleeve is lifted is measured with a dial gauge. Generally, three locations in the circumferential direction of the sleeve are measured as measurement locations.

JP 2002-221239 A

  However, there is a problem that the position where the dial gauge is attached every time is easily changed in the radial direction of the part due to measurement by a person. In addition, since the measurement is performed by lifting the parts by human power, there is a problem that it changes due to the human force. There was also a problem that the measurement position changed for each measurement due to the human-sensed equal distribution in the circumferential direction for the measurement at three locations in the circumferential direction. Due to the above problems, there is a problem that the measurement value is largely caused by a person (skilled) and a measurement error tends to occur.

  Keeping the axial backlash (axial backlash) of this spline fitting part within a specified range is important to prevent gear failure in manual transmissions. If the measured value of axial backlash is not stable, The occurrence of a problem is considered.

  Accordingly, an object of the present invention is to provide an axial backlash measuring device for a spline fitting component that can solve the above-described problems and can stably and accurately measure the axial backlash.

  In order to solve the above problems, the present invention mounts a spline fitting component formed by spline fitting an inner peripheral portion of an outer cylindrical member on an outer peripheral portion of the inner cylindrical member so that the inner peripheral portion is movable in the axial direction. A workpiece receiving device to be placed, a workpiece pressing device that presses the inner cylinder member against the workpiece receiving device, and a workpiece receiving device that is inserted between the workpiece receiving device and the outer cylinder member to lift a part of the outer cylinder member in the circumferential direction. And a lifting device having a wedge actuator for driving the wedge in the insertion / removal direction, and a measuring unit for measuring the amount of movement of the outer cylinder member lifted by the lifting device. .

  The workpiece holding device and the lifting device are provided on a workbench, the work receiving device is movably provided on the workbench, and a component measurement position for measuring an axial backlash of the spline fitting component; The workpiece receiving device may be reciprocated between a sprocket fitting component and a component loading position for mounting or dismounting the spline fitting component.

  The workpiece receiving device includes a workpiece receiving jig for placing the spline fitting component, and an indexing actuator for rotating the workpiece receiving jig about a vertical axis and stopping at a predetermined rotation position. Good.

  A guide groove for guiding the wedge may be formed in the workpiece receiving jig so as to face the lifting device when the workpiece receiving jig stops at the predetermined rotation position.

  The wedge actuator is provided with a wedge holding portion for holding the wedge so as to be movable in the insertion / removal direction, and the wedge holding portion is pressed with a predetermined force in the insertion direction between the wedge holding portion and the wedge actuator. A spring is preferably provided.

  According to the present invention, the axial backlash can be measured stably and accurately.

FIG. 1 is a side view of an axial backlash measuring device. FIG. 2 is a front view of FIG. FIG. 3 is a plan view of FIG. FIG. 4 is a plan view of an essential part of the axial backlash measuring device in which the workpiece receiving device has moved to the component measuring position. FIG. 5 is a side view of the main part of the axial backlash measuring device in which the work pressing device presses the inner cylinder member against the work receiving device. FIG. 6 is a side view of the main part of the axial backlash measuring device in which the lifting device lifts the outer cylinder member. FIG. 7 is an enlarged view of a main part of FIG. FIG. 8 is a flowchart showing an operation flow of the axial backlash measuring apparatus.

  A preferred embodiment of the present invention will be described with reference to the drawings.

  As shown in FIGS. 1, 2, and 3, the axial backlash measuring device 1 that measures the axial backlash of the spline fitting component 20 includes a workpiece receiving device 2 on which the spline fitting component 20 is placed, and a workpiece receiving device. A workpiece pressing device 3 that presses the hub 21 of the spline fitting component 20 against the device 2 and a wedge that is inserted between the workpiece receiving device 2 and the sleeve 22 to lift a part of the sleeve 22 of the spline fitting component 20 in the circumferential direction. 4, a lifting device 6 having a wedge actuator 5 that drives the wedge 4 in the insertion / removal direction, a measuring unit 7 that measures the amount of movement of the sleeve 22 lifted by the lifting device 6, the workpiece receiving device 2, A work pressing device 3, a lifting device 6, and a control device 8 that controls the measuring unit 7 are provided.

  Further, the axial backlash measuring device 1 includes a work receiving device 2, a work pressing device 3, a lifting device 6, and a work table 9 for supporting the measuring unit 7. The work table 9 includes a table portion 10 that is formed in a rectangular shape and leg portions 11 that extend downward from the table portion 10. The leg portion 11 has a movable leg 12 that can expand and contract downward, and a caster 13 that contacts the ground when the movable leg 12 is retracted upward. The work table 9 is provided with a measurement start switch 14 for starting measurement of the axial backlash of the spline fitting component 20. The measurement start switch 14 includes two push buttons 15 provided on the front surface of the work table 9 so as to be separated from each other on the left and right sides. When the two push buttons 15 are simultaneously pressed, the measurement of the axial backlash is started. ing. The work table 9 is provided with a frame 16 so as to surround the upper space of the table unit 10. The frame 16 is provided with a liquid crystal monitor 17 that displays the measurement result, a signal tower 18 that indicates a working state, a lighting device 19 that illuminates the work table 9, and the like.

  The workpiece receiving device 2 includes a workpiece receiving jig 23 on which the spline fitting component 20 is placed, an indexing actuator 24 that rotates the workpiece receiving jig 23 around a vertical axis and stops at a predetermined rotation position, And a traveling unit 26 that travels on a rail (LM guide) 25 that is provided on the indexing actuator 24 and provided on the work table 9.

  As shown in FIGS. 4 and 5, the work receiving jig 23 is a mounting table 27 formed in a disk shape, and a hub of the spline fitting component 20 provided to extend upward in the center of the mounting table 27. 21 and a positioning piece 29 for projecting upward on the mounting table 27 and positioning the spline fitting component 20 mounted on the mounting table 27 in the circumferential direction. With. The mounting table 27 is formed with three guide grooves 30 for guiding the wedge 4 of the lifting device 6 at intervals of 120 ° in the circumferential direction. Each of the guide grooves 30 extends in the radial direction, and the outer peripheral side is opened. Further, the guide groove 30 is arranged such that one of the guide grooves 30 faces the lifting device 6 when the work receiving jig 23 is stopped at a predetermined rotation position by the indexing actuator 24. The positioning piece 29 includes a pin that engages with a notch 31 formed on the outer periphery of the hub 21 at intervals of 120 °.

  The indexing actuator 24 is a hollow rotary actuator that is driven by pressurized air, and a first air supply unit 32 is connected to the indexing actuator 24. The first air supply unit 32 is controlled by the control device 8 to supply and stop air, and the indexing actuator 24 moves the workpiece receiving jig 23 in one direction at an angle corresponding to the amount of pressurized air supplied. It is designed to be rotated.

  As shown in FIGS. 1 and 3, the traveling unit 26 is provided on the work table 9 so as to be movable along the rail 25, and a component measurement position 33 for measuring the axial backlash of the spline fitting component 20; The work receiving device 2 is provided so as to reciprocate between a part loading position 34 for mounting or removing the spline fitting part 20. Further, the work table 9 is provided with a carry-in / out device 35 for causing the workpiece receiving device 2 to travel along the rail 25. The carry-in / out device 35 includes an air cylinder, one end of which is connected to the work table 9 and the other end is connected to the traveling unit 26. A second air supply unit 36 is connected to the carry-in / out device 35. The second air supply unit 36 is controlled by the control device 8 to supply and stop air.

  As shown in FIGS. 2 and 5, the work pressing device 3 includes a support frame 37 that is formed in a gate shape and is provided on the table unit 10 so as to straddle the component measurement position 33, and the component measurement position 33 on the support frame 37. A workpiece holding cylinder 38 provided vertically above and extending downward, and a workpiece holding jig 40 provided on a cylinder rod 39 of the workpiece holding cylinder 38 for pressing and fixing the hub 21 against the workpiece receiving jig 23. With.

  The work pressing cylinder 38 is composed of an air cylinder, and the work pressing jig 40 is lowered by extending. As shown in FIG. 1, a third air supply unit 41 is connected to the work pressing cylinder 38, and the third air supply unit 41 is controlled by the control device 8 to supply and stop air. Yes. As shown in FIGS. 1 and 5, the cylinder rod 39 of the work pressing cylinder 38 is provided with a bracket 43 extending in the diameter direction with a sleeve pressing member 42 for pressing the upper surface on the diametrically opposite side of the lifting position of the sleeve 22. It can be moved up and down. The bracket 43 is provided with a pressing member spring 44 that elastically biases the sleeve pressing member 42 downward, and presses the sleeve 22 with a predetermined force.

  The work pressing jig 40 is formed in a disk shape having a smaller diameter than the hub 21 and presses the hub 21 evenly in the circumferential direction.

  As shown in FIGS. 1 and 6, the lifting device 6 includes a support base 45 provided on the work table 9, and a telescopic unit 46 provided on the support base 45 and extending and contracting toward the component measurement position 33. A wedge actuator 5, a wedge holding portion 47 that is provided on the expansion / contraction portion 46 of the wedge actuator 5 so as to be movable in the expansion / contraction direction (the insertion / removal direction of the wedge 4), the wedge 4 attached to the wedge holding portion 47, A wedge spring 48 is provided between the holding portion 47 and the expansion / contraction portion 46 and presses the wedge holding portion 47 with a predetermined force in the extending direction (the insertion direction of the wedge 4).

  The support base 45 includes a support leg portion 49 provided upright on the work table 9 and a support table portion 50 provided on the support leg portion 49 and on which a wedge holding portion 47 is slidably mounted. The support table portion 50 is formed so that the height of the upper surface is the same as the bottom surface of the guide groove 30 formed in the workpiece receiving jig 23.

  The wedge actuator 5 is an air cylinder. As shown in FIG. 1, a fourth air supply unit 51 is connected to the wedge actuator 5, and the fourth air supply unit 51 is controlled by the control device 8 to supply and stop air. Yes. As shown in FIG. 6, the wedge actuator 5 has a plate-like regulated portion 52 in the expansion / contraction portion 46, and the regulated portion 52 abuts on an extension stopper 53 provided on the work table 9 to extend the length. It has come to be regulated. The wedge actuator 5 has a guide rod 54 that extends from the regulated portion 52 in the extending direction and guides the wedge holding portion 47 so as to be movable in the insertion / removal direction. The guide rod 54 has a movement stopper 55 that restricts the movement of the wedge holder 47 at the end in the insertion direction.

  As shown in FIGS. 6 and 7, the wedge holding portion 47 is formed in a block shape and has an insertion hole 56 through which the guide rod 54 is inserted. The insertion hole 56 is provided with a low friction material 57 that contacts the guide rod 54, so that the wedge holding portion 47 slides smoothly along the guide rod 54.

  The wedge 4 is formed in a triangular shape whose height decreases in the insertion direction, and is slidably brought into surface contact with the upper surface of the support table portion 50.

  The measuring unit 7 is provided on the cylinder rod 39 of the work holding cylinder 38 so as to be slidable up and down via a bracket 43, and a measuring element 58 that comes into contact with the upper surface of the sleeve 22 in the lifting position when the work holding cylinder 38 extends downward. A measuring element spring 59 which is provided in the bracket 43 and pushes down the measuring element 58 downward, and a smart sensor 60 which is provided in the bracket 43 at a distance vertically above the measuring element 58 and which measures the distance to the measuring element 58. Become. The smart sensor 60 is controlled by the control device 8. The control device 8 is composed of a sequencer.

  Next, the operation of the axial backlash measuring device 1 will be described.

  As shown in FIGS. 1 and 8, when measuring the axial backlash of the spline fitting component 20, the spline fitting component 20 is attached to the workpiece receiving jig 23 in accordance with the positioning piece 29, and the workpiece receiving device 2 is attached to the workpiece receiving device 2. It is moved from the input position 34 to the component measurement position (a position below the workpiece pressing device 3 vertically) 33 (step S1). Specifically, the workpiece receiving jig 23 is configured such that the hub 21 is fitted to the convex portion 28 of the workpiece receiving jig 23 at the component loading position 34 and the positioning piece 29 is engaged with the notch 31 of the hub 21. The spline fitting component 20 is installed on the top. The spline fitting component 20 is positioned in the radial direction by fitting the convex portion 28 of the workpiece receiving jig 23 into the shaft hole of the hub 21, and the positioning piece 29 is placed in any notch portion 31 of the hub 21. The circumferential positioning is performed by being engaged. At this time, since the positioning piece 29 is positioned in front of the operator, the spline fitting component 20 can be easily aligned. Thereafter, the two push buttons 15 are pressed simultaneously. The control device 8 detects that the two push buttons 15 are simultaneously pressed, and operates the second air supply unit 36 to retract the carry-in / out device 35. As a result, as shown in FIG. 4, the workpiece receiving device 2 is moved along the rail 25 in the direction of the lifting device 6 and stops at the component measurement position 33.

  The control device 8 operates the first air supply unit 32 to rotate the work receiving jig 23 by 60 degrees with the indexing actuator 24 (step S2 in FIG. 8). Accordingly, the guide groove 30 is moved to a position facing the lifting device 6.

  As shown in FIGS. 5 and 8, the control device 8 extends the work pressing cylinder 38 and lowers the work pressing jig 40 (step S3). The hub 21 is pushed downward by the work holding jig 40 and is sandwiched and fixed between the work holding jig 40 and the work receiving jig 23. Further, when the work pressing cylinder 38 extends, the measuring element 58 follows and descends. The tracing stylus 58 is placed on the sleeve 22 while the workpiece pressing cylinder 38 is being extended. When the workpiece pressing cylinder 38 is further extended, the tracing stylus spring 59 is deformed against the spring force. The probe 58 slides relative to the bracket 43.

  Thereafter, the control device 8 operates the smart sensor 60 to measure the height position of the sleeve 22 (step S4). Specifically, the smart sensor 60 measures the distance from the smart sensor 60 to the measuring element 58. This measured value is stored in the control device 8 as a reference value before lifting a part of the sleeve 22 in the circumferential direction.

  As shown in FIGS. 6, 7, and 8, the control device 8 extends the wedge actuator 5 to advance the wedge 4 toward the workpiece receiving jig 23. As a result, the wedge 4 is inserted into the guide groove 30 of the workpiece receiving jig 23 and abuts against the lower edge of the outer periphery of the sleeve 22, and the wedge actuator 5 further expands, whereby the wedge spring 48 resists the spring force. The wedge 4 is inserted between the workpiece receiving jig 23 and the sleeve 22 while being deformed, and the sleeve 22 at the position of the wedge 4 is lifted up (step S5). Since the insertion amount of the wedge 4 is determined by the force of the spring, it can be stably inserted with a constant force.

  Thereafter, the control device 8 activates the smart sensor 60 to measure the height position of the sleeve 22, and calculates the difference between the measured value measured before the sleeve 22 is lifted and the measured value after the sleeve 22 is lifted. Calculated as (axial backlash) (step S6). Further, the control device 8 determines whether or not the axial backlash is between a preset upper limit value and lower limit value, and displays “OK” on the liquid crystal monitor 17 if the axial backlash is within the above range. If it is out of the above range, “NG” is displayed and the numerical value of the axial backlash is also displayed.

  When a partial axial backlash in the circumferential direction of the spline fitting component 20 is measured in this way, the control device 8 retracts the wedge actuator 5 to retract the wedge 4 from the workpiece receiving jig 23 and the workpiece. The holding cylinder 38 is retracted to release the fixing of the hub 21, the first air supply unit 32 is operated, the work receiving jig 23 is rotated 120 ° by the indexing actuator 24 (step S 7), and the work holding cylinder 38 is moved. The hub 21 is fixed by being extended, and the probe 58 is placed on the sleeve 22.

  Thereafter, the control device 8 measures the height position of the sleeve 22 (step S8), advances the wedge 4 to lift up the sleeve 22 (step S9), measures the height position of the sleeve 22 and measures the sleeve 22. Is calculated (step S10), and “OK” or “NG” and the numerical value of the axial backlash are displayed on the liquid crystal monitor 17.

  Further thereafter, the control device 8 retreats the wedge 4 from the workpiece receiving jig 23 in the same procedure as described above, releases the fixing of the hub 21, and rotates the workpiece receiving jig 23 by 120 ° (step S11). The work holding cylinder 38 is extended to fix the hub 21 and the measuring element 58 is placed on the sleeve 22.

  Thereafter, the control device 8 measures the height position of the sleeve 22 (step S12), advances the wedge 4 to lift up the sleeve 22 (step S13), measures the height position of the sleeve 22 and measures the sleeve 22. Is calculated (step S14), and "OK" or "NG" and the numerical value of the axial backlash are displayed on the liquid crystal monitor 17.

  After that, the control device 8 releases the fixing of the hub 21, rotates the workpiece receiving jig 23 by 60 degrees (step S15), and moves the workpiece receiving device 2 from the component measurement position 33 to the component loading position 34 (step S15). S16).

  When the measurement results at the three points in the circumferential direction of the spline fitting part 20 are all OK, the operator sends the spline fitting part 20 to the subsequent stroke. If the measurement result is NG, the combination of the sleeve 22 and the hub 21 is changed by exchanging the other spline fitting part 20 and the sleeve 22 or the hub 21, and the above-described axial backlash is measured again. . At this time, referring to the numerical value of the axial backlash displayed on the liquid crystal monitor 17, the axial backlash becomes OK by combining, for example, a value slightly lower than the lower limit value and a value slightly higher than the upper limit value. Probability can be increased.

  In this way, the workpiece receiving device 2 for mounting the spline fitting component 20 formed by spline fitting the inner peripheral portion of the sleeve 22 to the outer peripheral portion of the hub 21 so as to be movable in the axial direction; The workpiece holding device 3 that presses the hub 21 against the workpiece receiving device 2 and the wedge 4 that is inserted between the workpiece receiving device 2 and the sleeve 22 in order to lift a part of the sleeve 22 in the circumferential direction, and the wedge 4 is inserted in the insertion / extraction direction. Since the axial backlash measuring device 1 includes the lifting device 6 having the wedge actuator 5 to be driven and the measuring unit 7 for measuring the movement amount of the sleeve 22 lifted by the lifting device 6, the hub 21 and Positioning of the sleeve 22 can be automated, and the lifting of the sleeve 22 and the division of the spline fitting part 20 in the circumferential direction (switching of measurement positions in the circumferential direction) can be automated. People can eliminated as much as possible the measurement error factors due to the axial backlash can stably accurately measure. Further, it is possible to prevent a gear disconnection problem due to the axial backlash of the spline fitting component 20 being outside the proper range. In addition, measurement time can be shortened by automation of measurement.

  The workpiece receiving device 2 is movably provided on the workbench 9, and the component measuring position 33 for measuring the axial backlash of the spline fitting component 20 and the spline fitting component 20 are attached to or detached from the workpiece receiving device 2. Therefore, the spline fitting part 20 can be easily attached to and detached from the workpiece receiving device 2 and the spline fitting part 20 can be easily and accurately attached to the part measurement position 33. Can be positioned.

  The workpiece receiving device 2 includes a workpiece receiving jig 23 on which the spline fitting component 20 is placed, and an indexing actuator 24 that rotates the workpiece receiving jig 23 about the vertical axis and stops at a predetermined rotation position. Since it was provided, positioning of the measurement position of the circumferential direction of the spline fitting component 20 can be performed easily and accurately.

  The work receiving jig 23 is formed with a guide groove 30 for guiding the wedge 4 so as to face the lifting device 6 when the work receiving jig 23 stops at the predetermined rotation position. The wedge 4 can be stably inserted between the workpiece receiving jig 23 and the sleeve 22 and can be inserted at an accurate position, and the axial backlash can be accurately measured.

  The wedge actuator 5 is provided with a wedge holding portion 47 for holding the wedge 4 so as to be movable in the insertion / removal direction. Between the wedge holding portion 47 and the wedge actuator 5, the wedge holding portion 47 has a predetermined force in the insertion direction. Since the wedge spring 48 for pressing is provided, the sleeve 22 can always be lifted with a constant force, and the axial backlash can be accurately measured.

  The spline fitting component 20 to be measured by the axial backlash measuring device 1 is composed of the sleeve 22 and the hub 21 used in the transmission speed change mechanism, but is not limited thereto. It is not limited to the one used in the transmission speed change mechanism, as long as the inner peripheral portion of the outer cylindrical member is spline fitted to the outer peripheral portion of the double cylindrical inner cylindrical member so as to be movable in the axial direction. .

  Moreover, although the measurement part 7 shall be provided with the smart sensor 60 which measures the distance to the measuring element 58, it is not restricted to this. Any other type of sensor can be used as long as it can calculate the amount of movement of the probe 58 from the measurement result before the sleeve 22 is lifted and the measurement result after the sleeve 22 is lifted. May be provided.

  When a part of the sleeve 22 in the circumferential direction is lifted, the sleeve pressing member 42 and the pressing member spring 44 may be omitted if the sleeve 22 on the diametrically opposite side from the lifting position does not lift.

DESCRIPTION OF SYMBOLS 1 Axial backlash measuring device 2 Work receiving device 3 Work holding device 4 Wedge 5 Wedge actuator 6 Lifting device 7 Measuring unit 9 Work table 20 Spline fitting component 21 Hub (inner cylinder member)
22 Sleeve (outer cylinder member)
23 Work receiving jig 24 Indexing actuator 30 Guide groove 33 Part measurement position 34 Part input position 47 Wedge holding part 48 Wedge spring

Claims (5)

  A workpiece receiving device for mounting a spline fitting component, in which the inner circumferential portion of the outer cylindrical member is spline fitted to the outer circumferential portion of the inner cylindrical member so as to be movable in the axial direction, and the workpiece receiving device And a work pressing device that presses the inner cylinder member to the outer cylinder member, and a wedge inserted between the work receiving device and the outer cylinder member to lift a part of the outer cylinder member in the circumferential direction. An axial backlash measurement of a spline fitting component, comprising: a lifting device having a wedge actuator for driving; and a measuring unit for measuring a movement amount of the outer cylinder member lifted by the lifting device. apparatus.   The workpiece holding device and the lifting device are provided on a workbench, the work receiving device is movably provided on the workbench, and a component measurement position for measuring an axial backlash of the spline fitting component; The axial backlash measuring device for a spline fitting component according to claim 1, wherein the device is configured to reciprocate between a workpiece loading position for mounting or removing the spline fitting component on the workpiece receiving device.   The workpiece receiving device includes a workpiece receiving jig for placing the spline fitting component, and an indexing actuator for rotating the workpiece receiving jig around a vertical axis and stopping the workpiece receiving jig at a predetermined rotation position. 3. An axial backlash measuring device for spline fitting parts according to claim 1 or 2.   The guide groove for guiding the wedge is formed in the workpiece receiving jig so as to face the lifting device when the workpiece receiving jig stops at the predetermined rotation position. A device for measuring axial backlash of spline fitting parts.   The wedge actuator is provided with a wedge holding portion for holding the wedge so as to be movable in the insertion / removal direction, and the wedge holding portion is pressed with a predetermined force in the insertion direction between the wedge holding portion and the wedge actuator. The apparatus for measuring an axial backlash of a spline fitting component according to any one of claims 1 to 4, wherein a spring for performing the operation is provided.

Images