JPH0466289B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention is suitable for measuring shaft heights such as the height between bearings of a predetermined number of shafts of different dimensions collectively and repeatedly. This invention relates to an axial height measuring device.

[Prior art]

When assembling a reducer etc. that has multiple shafts, measure the height between the two bearings of each set of shafts supported by the housing, and select a spacer for each shaft based on this. It is assembled by interposing it between the end face of the bearing and the housing to give each bearing the optimum preload. Since the diameter of the bearing and the height between the bearings differ for each axis, there are multiple types of axes to be measured, but conventional measuring devices of this type touch the measuring surfaces of two bearings each time they measure each axis. The contacting jigs had to be replaced manually.

[Problem that the invention seeks to solve]

However, in such a measuring device, two jigs are manually exchanged for each axis constituting one set for measurement, resulting in a problem of poor measurement work efficiency. The present invention solves the above problem by reducing the number of times at least one of the jigs is replaced by using a turntable.

[Means for solving problems]

For this purpose, the shaft height measuring device according to the invention comprises:
As illustrated in the illustrated embodiment, a support surface 2 that comes into contact with and supports the lower measurement surface W1 of the shaft workpiece W
8a, and a gauge surface 3 that comes into contact with the upper measurement surface W2 of the shaft workpiece W.
7a, a plurality of jig mounting stands 25 for removably mounting and supporting at least one type of the test jig 28, and a vertical axis O.
The jig mounting bases 25 are supported on the bed 10 so as to be rotatable in the circumferential direction, and each of the jig mounting bases 25 is supported at a plurality of equally divided positions along the circumferential direction, and is rotationally driven by the indexing device 21. 25 as the attachment/detachment station FS and measurement station MS on the bed 10.
A turntable 20 indexed to
a measurement head 30 that hangs and supports the measurement head 7 in a detachable manner;
A magazine 41 that is attached to the support member 12 and stores the plurality of types of measurement gauges 37, and a magazine 41 that is attached to the support member 12 and stores the plurality of types of measurement gauges 37;
The inspection gauge 37 stored in the magazine 41 corresponds to the inspection jig 28 indexed by the MS.
The apparatus is equipped with a measuring gauge exchange device 40 for attaching and detaching a gauge to the measuring head 30, and a detecting head 34 for measuring the amount of relative movement between the measuring head 30 and the jig mount 25.

[Effect]

A set of shaft workpieces W that constitutes a predetermined deceleration mechanism
Each of the corresponding inspection jigs 28 is mounted and supported on each jig mounting stand 25, and each of the shaft workpieces W forming one set has its lower measurement surface W1 attached to each of the corresponding inspection jigs 2.
8 and is supported thereon. Each shaft workpiece W supported on each inspection jig 28 is sequentially indexed to the measurement station MS by the rotation of the turntable 20, and one of the measurement gauges 37 stored in the magazine 41 is indexed each time. A gauge corresponding to the shaft workpiece W is automatically attached to and detached from the measurement head 30 by the inspection gauge exchange device 40. Then, the measuring head 30, in which the measuring gauge 37 has been replaced, descends to bring the gauge surface 37a into contact with the upper measuring surface W2, and the detecting head 34 measures the shaft height between the measuring surfaces W1 and W2 of the shaft object W. do. This is repeated for each shaft workpiece W sequentially indexed to the measurement station MS by the turntable 20, and both measurement surfaces W1,
Measure the shaft height between W2. If the specifications of the next pair of shaft workpieces W to be measured are the same, each inspection jig 28 mounted and supported on each jig mount 25 on the turntable 20 remains as it is, and the next one is placed on top of it. A set of shaft workpieces W is supported, and the height of each shaft is measured by similarly attaching and detaching the measuring gauge 37 using the measuring gauge changing device 40. If the specifications of a set of shaft workpieces W to be measured change due to changes in the specifications of the reducer, etc. to be assembled, each inspection jig 28 on each jig mounting stand 25 is adjusted to correspond to each shaft workpiece W after the change. Then, by rotating the turntable 20, the measuring gauge 37 corresponding to the shaft workpiece W indexed by the measuring station MS is attached to and removed from the measuring head 30 by the measuring gauge exchange device 40, and the shaft of each shaft workpiece W is changed. Measure height.

〔Effect of the invention〕

As described above, according to the present invention, there is no need to replace each inspection jig on the jig mount unless the specifications of a set of shaft workpieces to be measured change, and the inspection gauge 37 is stored in the magazine. The measuring gauge changing device automatically attaches and detaches the one corresponding to the shaft workpiece indexed by the measuring station to the measuring head and measures the shaft height. The efficiency of measurement work can be improved by reducing the effort required to repeatedly measure the shaft height of a shaft workpiece. Furthermore, changes in the specifications of a set of shaft workpieces to be measured can be easily accommodated by replacing each measuring jig on the jig mounting base.

〔Example〕

Examples will be described below with reference to the accompanying drawings.

As shown in FIGS. 1 to 4, a turntable 20 is supported by a support stand 15 on the bed 10 so as to be able to rotate around a vertical axis O and to be able to move up and down to some extent. The upper support plate 12 that supports 30 movably in the vertical direction is 4
It is fixed via a book support 11. bed 1
A mounting/detaching station FS and a measuring station MS are provided on the turntable 20 and located around the turntable 20. Various types of inspection jigs 28 are installed on one side of the bed 10 located on the FS side of the attachment/detachment station for attaching and detaching the inspection jig 28 and the shaft workpiece W, which will be described later.
A jig storage box 13 is installed to store the equipment, and measurement operation panels 16 are installed on the left and right sides of the measurement station MS. A measurement reference stand 14 is fixed on the bed 10 at the position of the measurement station MS.

As shown in FIG. 3, the turntable 20 includes:
Six support stations S1, S2, S3, S4, S are placed at positions divided into six equal parts around the vertical axis O.
5 and S6 are provided, and each support station is provided with a cylindrical jig mounting base 25, respectively.
As shown in FIG. 1, each jig mounting base 25 is supported by a support tube 22 fixed to the turntable 20 so as to be slidable only in the vertical direction. The turntable 20 is rotationally driven in one direction (counterclockwise direction in FIG. 3) by a table indexing device 21 equipped with an indexing cylinder 21a, and each jig mounting base 2
5 are sequentially assigned to the measuring station MS. Prior to this rotation, the turntable 20 rises a little along with the jig mount 25, and as a result, support surfaces protruding from three locations on the circumference of the lower surface of the jig mount 25 (hereinafter simply referred to as three-point support surfaces) are formed. 25c is apart from the top surface 14a of the measurement reference table 14 during indexing rotation, and after indexing is completed, the turntable 20 is lowered and the three-point support surface 25c comes into contact with the top surface 14a of the measurement reference table 14. ing. As shown in Fig. 1, this index rotation causes
Hook member 2 fixed to the lower surface of the jig mounting base 25
The head 27a of the rod engages with the T-groove 26a of 6, and the pull-down cylinder 27 provided on the measurement reference table 14 is activated, and the three-point support surface 25c is It is adapted to be pressed against the upper surface 14a of the reference stand 14. Thereby, the jig mounting base 25 indexed by the measuring station MS is accurately positioned in the vertical direction with respect to the bed 10.

As shown in FIG. 1, a plurality of types of inspection jigs 28 are removably placed and supported in a shallow cylindrical recess 25a provided at the top of the jig mount 25. The outer periphery of the inspection jig 28 is a recess 25a.
It has a diameter that fits into the inner periphery of the
A three-point support surface 28b is formed which is supported by contacting the support surface 25b of 5a. Moreover, the upper side of each inspection jig 28 has an inner diameter that fits into the outer periphery of the lower bearing Wa of multiple types of shaft assemblies (shaft workpieces) W as shown in FIG. 9, and the lower surface ( lower measurement surface)
Three-point support surface 28a that contacts and supports W1
A recessed portion is formed.

As shown in FIGS. 1 and 2, the upper support plate 12
The two guide tubes 32 fixed to the pilot bar 31 each support the pilot bar 31 so as to be slidable in the vertical direction, and the measuring head 30 fixed to the lower end of the pilot bar 31 supports the pilot bar 31 vertically slidably.
is movable in the vertical direction coaxially above the jig mount 25 indexed by the measurement station MS. The measuring head 30 is connected to the lower end of a piston rod 33a of an elevating cylinder 33 provided on the upper support plate 12 coaxially therewith, and is driven up and down. Measuring head 3
A horizontal support groove 30d is formed in the support portion 30a integrally provided at the lower part of the 0, into which a carrier 38 holding a plurality of types of inspection gauges 37, which will be described later, in a movable manner in the vertical direction is mounted. The lower side of the support groove 30d is connected to the carrier 3 as shown in FIG.
Most parts are open except for support surfaces 30e on both sides that support 8. As shown in FIGS. 1 and 6, an abutment ring 30 is provided at the center of the upper surface of the support groove 30d.
b is fixed, and the three-point contact surface 30c on the lower surface thereof can come into contact with the upper surface 37b of the measurement gauge 37. As shown in FIGS. 1 and 2, the upper support plate 1
A scale 35 is vertically fixed to the scale 2, and a detection head 34 is fixed to the measurement head 30 via a bracket 36, which cooperates with the scale 35 to measure the relative movement of both the scales 12 and 30. There is.

As shown in FIG. 2 to FIG.
A measuring gauge changing device 40 is provided which automatically attaches and detaches a predetermined one of the eight measuring gauges to and from the measuring head 30. The main parts of the test gauge exchange device 40 include a magazine 41 that holds a plurality of types of test gauges 37 together with a carrier 38, moves in the longitudinal direction according to a command from a control device, and indexes a predetermined one to a predetermined position P, which will be described later. , the measurement gauge 3 indexed to a predetermined position P
7 and carrier 38 are attached to and detached from the measuring head 30. As shown in FIG. 5, two rails 42 are provided on the bottom surface of the upper support plate 12.
is fixed perpendicularly to the support groove 30d of the measuring head 30 via the bracket 42a, and this rail 4
2, the magazine 41 is inserted through the guide groove member 41a.
are guided and supported in the longitudinal direction. Magazine 41
Support grooves 30 for measuring heads 30 are provided on the lower surfaces of the respective measuring heads 30.
A plurality of holding members 43 are provided along the longitudinal direction in which holding grooves 43a having the same inner shape and parallel to d are formed. Each holding member 43 is attached to each carrier 38
, a holding groove 43 having supporting surfaces 43b on both lower sides.
It is held so that it can be inserted and removed along the direction a, and that it does not slip out on its own by a detent mechanism (not shown) or the like.

As shown in FIGS. 1 and 6, each carrier 38 has a large diameter hole 38a and a small diameter hole 38b continuously formed from the upper part to the lower part.
The measurement gauge 37 loosely fitted inside is supported so that the flange 37c on its upper outer periphery is engaged with a step at the boundary between the holes 38a and 38b, so that it can move upward. Gauge replacement cylinder 47 for each carrier 38
A hook portion 39 having a T-groove 39a is fixed to the side, and a notch 39b is provided at the upper center of the hook portion 39, as shown in FIG. 6th
7, the lower inner surface of the inspection gauge 37 has an inner diameter that fits into the outer periphery of the upper bearing Wb of a plurality of types of shaft assemblies W as shown in FIG. Three step portions each having a three-point gauge surface 37a that can come into contact with the upper measurement surface W2 are formed, and a tapered surface that guides the upper bearing Wb is formed continuously below each step portion. The number of steps and the inner diameter of this step are
It is assumed that each measurement gauge 37 has a different diameter depending on the outer diameter of the upper bearing Wb of the plurality of shaft assemblies W to be measured.

As shown in FIGS. 3 and 5, a magazine indexing cylinder 44 provided on a bracket 42a that supports the magazine 41 has a piston rod 44a.
The leading end of the magazine 41 is fixed to a lug 45 of the magazine 41, and is actuated by a command from a control device (not shown) to drive the magazine 41 in the longitudinal direction, and a predetermined measuring gauge 3
7 is indexed to a predetermined position P corresponding to the support portion 30a of the measurement head 30. As shown in FIG. 5, between the holding member 43 indexed at a predetermined position P and the support portion 30a of the measuring head 30 located at the highest
A guide groove 53a that is continuous with the grooves 30d and 43a of grooves a and 43 and has similar support surfaces 53b on both lower sides.
A gauge guide rail 53 having a gauge formed thereon is fixed to the upper support plate 12 via a bracket 54.
When the magazine 41 is indexed, the tip of the knock pin 51a operated by the positioning cylinder 51 provided on the upper support plate 12 engages with the groove 52a of the block 52, and the magazine 41 is accurately positioned.

As shown in FIGS. 3 to 5, a gauge conversion cylinder 47 is supported on the lower side of the upper support plate 12 via a bracket 46 corresponding to a predetermined position P. Piston rod 4 of gauge conversion cylinder 47
When 7a is in the retracted state, the engagement member 47b at the tip of the engagement member 47b engages each holding member 43 of the magazine 41 indexed in the longitudinal direction, as shown by the two-dot chain line in FIG.
The hook member 39 of each carrier 38 held by the carrier 38 is sequentially engaged with the T-groove 39a of the hook member 39. Predetermined measurement gauge 3
7 is indexed to a predetermined position P, and its carrier 38
When the piston rod 47a of the gauge exchange cylinder 47 is extended with the engaging element 47b engaged with the T-groove 39a of the hook member 39, the carrier 38 supporting the measurement gauge 37 is pushed out from the holding groove 43a of the holding member 43. and is inserted into the support groove 30d of the measuring head 30 through the guide groove 53a of the gauge guide rail 53. piston rod 47
A pilot bar 48 guided by a guide tube 49 fixed to a bracket 46 is provided parallel to the pilot bar 48 below the piston rod a, and the tip of the pilot bar 48 is connected to the tip of the piston rod 47a by a connecting member 50. As shown in FIG. 5, the engagement pin 50a provided on the connecting member 50 engages with the engagement hole 53c of the gauge guide member 53 when the piston rod 47a is in its most extended state, and in this state, the engagement pin 50a engages with the engagement hole 53c of the gauge guide member 53. prevents it from bending.

In the state shown in FIG. 5 in which the carrier 38 and the measuring gauge 37 are attached to the measuring head 30, when the piston rod 33a of the lifting cylinder 33 is extended, the engaging element 47b is moved into the T-slot 3 by the notch 39b.
However, since the carrier 38 is positioned by a detent mechanism (not shown) or the like, it does not move within the support groove 30d. The carrier 38 and the inspection gauge 37 are the lifting cylinder 3
3 and lowers together with the measuring head 30, as shown in FIG.
The three-point gauge surface 37a of the inspection gauge 37 comes into contact with the upper measurement surface W2 of the shaft assembly W on which the lower measurement surface W1 is supported on the a, and then the upper surface 3 of the measurement gauge 37
7b contacts the three-point contact surface 30c of the measuring head 30, and the elevating cylinder 33 applies a predetermined preload to each bearing Wa, Wb. In this state, the operator rotates the shaft assembly W by hand and gives a measurement command, and the detection head 34 measures the distance E between the upper surface 14a of the measurement reference surface 14 and the three-point contact surface 30c of the measurement head 30. Then, the shaft height A between the lower and upper measurement surfaces W1 and W2 of the shaft assembly W is determined by the following formula.

A=E-(F+G+H) However, F: Predetermined three-point gauge surface 37 of the inspection gauge 37
Distance between a and the top surface 37b G: Upper and lower three-point support surfaces 28a of the inspection jig 28,
Distance between 28b H: Upper and lower support surfaces 25b and 3 of jig mounting base 25
Distance from the point support surface 25c When the measurement of the shaft height A of one shaft assembly W is completed, the measuring head 30 is returned to the uppermost position by the lifting cylinder 33 and the piston rod 47a is inserted into the T groove 39a of the carrier 38. The engaging member 47b at the tip of the engaging element 47b is engaged. Next, the piston rod 47a is retracted and the carrier 38 is moved into the magazine 41 together with the measuring gauge 37.
into the holding member 43 of the positioning cylinder 51.
After removing the dowel pin 51a, the magazine indexing cylinder 44 is operated, and the holding member 4 of the carrier 38 holding the measuring gauge 37 to be used next is removed.
3 to a predetermined position P. In parallel with the above, the table indexing device 21 is operated to rotate the turntable 2.
0 and move the next shaft assembly W to the measurement station.
MS is indexed, and the shaft height of the next shaft assembly W is measured in the same manner as described above.

Next, an example of the operation when assembling a speed reducer having six shafts will be explained with reference to the flowchart shown in FIG. First, in step 80, the type of transmission is input into the inspection operation panel 16, and in the next step 81, the number of shafts of the transmission, the type of each shaft assembly to be measured, the inspection jig and the measurement gauge are input. The type, etc. are read into the control device from the storage device. In step 82, the first
After indexing the jig mount 25 of the station S1 to the attachment/detachment station FS, in step 83, the inspection jig 28 on the jig mount 25 of the first station S1 and the measured shaft assembly W are stored in the jig storage. It is replaced with the predetermined inspection jig 28 taken out from the box 13 and the shaft assembly W to be measured. In this case, the inspection jig 28 stored in a predetermined position in the jig storage box 13 to be taken out is indicated by a lamp or the like lit by the control device. Note that if the type of transmission remains unchanged, there is no need to replace the inspection jig 28. After replacing the inspection jig 28 on the jig mounting base 25 of the first station S1 and the shaft assembly W as described above, the process returns from step 84 to step 82, and the second
- Repeat the above operations for the sixth stations S2 to S6. When the replacement of the inspection jig 28 and shaft assembly W of the sixth station S6 is completed, proceed to step 8.
4, proceed to step 85. In this state, as shown in FIG. 3, the jig mounting base 25 of the second station S2 of the turntable 20 is indexed to the measurement station MS.

After indexing the jig mounting base 25 of the second station S2 of the turntable 20 to the measurement station MS in step 85 (as described above, this indexing has already been done, no special operation is required), the measurement is performed in step 86. head 3
The test gauge 37 attached to the test gauge 0 is replaced with a predetermined one by a test gauge exchange device 40 that operates in response to a command from a control device. In the next step 87, after lowering the measuring head 30 using the lifting cylinder 35 and measuring the shaft height dimension A between the measuring surfaces W1 and W2 of both bearings Wa and Wb, as described above,
In step 88, the dimensions of the housing side of the reducer shown in FIG. 10 measured by a separate measuring device are read, and the spacer thickness t is calculated using the following equation.

t=(B+C+D)-(A+α) However, B: Height of housing After calculating the spacer thickness t of the shaft assembly W supported by the station, the process returns from step 89 to step 85, and the above operations are repeated for the third to sixth and first stations S3 to S6 and S1. When the calculation of the spacer thickness t of the shaft assembly W supported by the first station S1 is completed, the process moves to the next step 90, where a spacer of a predetermined thickness required for each shaft assembly W is selected, and the step At step 91, this spacer is interposed between the bearing and the cover, and the reducer is assembled. When the assembly of one reduction gear is completed, the type of the next reduction gear is input into the inspection operation panel 16, and the next reduction gear is assembled using the same steps as described above.

The above description has been made of the case of assembling a speed reducer having six axes, but in the case of five or less axes, empty stations may be provided on the turntable 20 according to the number of axes. Note that the number of support stations (S1 to S6) on the turntable 20 is made to match the maximum number of axes of each reduction gear for which pre-assembly measurement is performed by this device.

As described above, in this embodiment, the measurement gauge 37 attached to the measurement head 30 is automatically replaced by the measurement gauge exchange device 40, so that the efficiency of measurement work is further improved. In addition, the inspection jig 28 and the shaft assembly W in the attachment/detachment station FS
It is also possible to automatically perform the replacement by a robot.

Note that the shaft height measuring device according to the present invention is not limited to measuring the shaft height between the bearings of the shaft assembly as in this embodiment.
It can also be used to measure the total length of a normal shaft workpiece or the shaft height between intermediate steps.

[Brief explanation of the drawing]

The drawings show an embodiment of the shaft height measuring device according to the present invention, and FIG. 1 is a cross-sectional view of the main part, and FIG.
This corresponds to a line sectional view, and the second figure is an overall front view, and the third figure is a front view.
The figure is an overall plan view, Fig. 4 is an overall right side view excluding the jig storage box, Fig. 5 is an enlarged sectional view along the - line of Fig. 3, and Fig. 6 is a - sectional view of Fig. 5. , FIG. 7 is a bottom view of the inspection gauge, and FIG. 8 is a flowchart when the present invention is used for assembling a reducer.
FIG. 9 is a diagram showing an example of the shaft assembly to be measured, and FIG. 10 is a diagram showing the housing of the reducer. Explanation of symbols, 10... Bed, 12... Support member (upper support plate), 20... Turntable, 2
1... Indexing device (table indexing device), 25...
Jig mounting base, 28...Inspection jig, 28a...Support surface (three-point support surface), 30...Measuring head, 34...
...Detection head, 37...Inspection gauge, 37a...
Gauge surface (3-point gauge surface), 40...Inspection gauge exchange device, 41...Magazine, FS...Mounting/detaching station, MS...Measuring station, O...Vertical axis, W...Shaft workpiece (shaft assembly) ), W1...
...lower measurement surface, W2...upper measurement surface.

Claims (1)

[Scope of Claims] 1. A plurality of types of inspection jigs each having a support surface that comes into contact with and supports the lower measurement surface of the shaft workpiece, and a gauge surface that comes into contact with the upper measurement surface of the shaft workpiece. a plurality of jig mounts for removably mounting and supporting a plurality of types of inspection gauges and at least one type of the above-mentioned inspection jig; a turntable that supports each of the jig mounts at a plurality of positions equally divided along the bed and is rotationally driven by an indexing device to index each of the jig mounts to the attachment/detachment station and the measurement station on the bed; a measuring head that is vertically movably supported by a support member above a jig mount indexed to the station and that suspends and supports a plurality of types of said measurement gauges in a detachable manner; a magazine for storing a plurality of types of measurement gauges; and the measurement gauges stored in the magazine corresponding to the measurement jig indexed to the measurement station by the turntable are attached to and removed from the measurement head. A shaft height measuring device comprising: an inspection gauge exchange device; and a detection head that measures the relative movement amount between the measuring head and the jig mounting base.