JPS6275207A - Shaft height measuring instrument - Google Patents

Abstract

PURPOSE:To improve the efficiency of measuring operation by using a turntable and decreasing the frequency of replacement of a jig. CONSTITUTION:Respective inspecting and measuring jigs corresponding to a couple of shaft body works W which constitute a specific speed reduction gear, etc., are mounted and supported on respective jig fitting bases 25 and the respectively works W are supported on the respective jigs 28 so that lower measurement surfaces W1 abut on abutting surfaces 28a. Those respective works W are indexed to a measurement station MS in order through the rotation of the turntable 20 and an inspecting and measuring gauge 27 corresponding to a work W is mounted on a measuring head 30 at every time. Then, the head 30 is lowered until the gauge surface 37a abuts on an upper measurement surface W2, so that the shaft height between both measurement surfaces W1 and W2 of each work W is measured successively. Then, when a couple of works W to be measured next are equal in specification, the respective jigs 28 on the respective fitting bases 25 are unchanged and the next couple of works W are supported to measure the shaft height. Thus, when the specification of the works W is unchanged, they are measured without replacing any jigs 2 and even when the specification is different, that is easily dealt with by replacing the jigs 28.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a shaft height measuring device used to measure the height dimensions between bearings of various types of shafts.

[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 jig had to be replaced manually.

[Problem that the invention seeks to solve]

However, in such a measuring device, two jigs for each axis making up one set are manually exchanged 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 present invention has a support surface 28a that comes into contact with and supports the lower measurement surface W1 of the shaft work W, as illustrated in the illustrated embodiment. A jig 28, a plurality of types of inspection gauges 37 having a gauge surface 37a that comes into contact with the upper measurement surface W2 of the shaft workpiece W, and at least one type of the above-mentioned inspection jig 28 are removably mounted and supported. Multiple jig mounting stands 25 and vertical axis 0
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 positions equally divided along the circumferential direction, and is rotationally driven by the indexing device 21. 25 to the loading/unloading station FS and measuring station MS on the bed 10;
It is vertically movably supported by a support member 12 fixed to the bed 10 above the jig mount 25 indexed by the measurement station MS, and a plurality of types of the measurement gauges 37 can be attached and detached. a measuring head 30 that is suspended and supported by the support member 12;
The sensor is equipped with a detection radar 34 for measuring the relative movement amount of the sensor.

[Effect]

Each inspection jig 28 corresponding to a set of shaft work W constituting a predetermined reduction gear etc. is mounted and supported on each jig mounting stand 25, and each set of shaft work W is mounted on the lower measurement surface W1. Contact surface 28
a and is supported on each inspection jig 28. Each shaft work W supported on each inspection jig 28 is sequentially indexed to the measurement station MS by rotation of the turntable 20, and the inspection gauge 37 corresponding to the shaft work W indexed each time is measured. The measuring head 30 is sequentially attached to the head 30, and the measuring head 30 descends to bring the gauge surface 37a into contact with the upper measuring surface W2, and the detection bed 34 measures the shaft height between the measuring surfaces Wl and W2 of each shaft workpiece W in a set. Measure sequentially. If the specifications of the next pair of shaft workpieces W to be measured are the same, each inspection jig 2B on each jig mounting stand 25 will remain as it is and support the next set of shaft workpieces W to adjust the shaft height. Measure. If the specifications of a set of shaft workpieces W to be measured change due to differences in the specifications of the reducer, etc., each measuring jig 28 is replaced and the shaft height is measured.

〔Effect of the invention〕

As described above, according to the present invention, the shaft height can be measured without replacing the measuring jig as long as the specifications of a set of shaft workpieces do not change, thereby improving measurement work efficiency. can. Furthermore, changes in the specifications of a set of shaft workpieces to be measured can be easily accommodated by replacing each measuring jig.

〔Example〕

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

As shown in Figures 1 to 4, there is a support stand 1 on the bed lo.
5 supports the turntable 20 so as to be able to rotate around the vertical axis 0 and to be able to move up and down to some extent, and above the bend 10 there are four upper support plates 12 that support the inspection head 30 so as to be movable in the vertical direction. It is fixed via a support 11. A mounting/detaching station FS and a measuring station MS are provided on the bed IO, located around the turntable 20. Inspection jig 28 and shaft workpiece W to be described later
A jig storage box 13 that stores various types of inspection jigs 28 is installed on one side of the bed 10 located on the side of the attachment/detachment station FS, which attaches and detaches the measuring station MS. is provided. 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 has six support stations St, 32. S3. S4. S5 and S6 are provided,
Each support station has a cylindrical jig mounting stand 25.
is provided.

Each jig mounting base 25 is supported slidably only in the vertical direction by a support cylinder 22 fixed to the turntable 20, as shown in FIG. Rotationally driven in one direction (counterclockwise rotation direction in FIG. 3) by the table indexing device 21,
Each jig mount 25 is sequentially indexed to the measurement 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 descends 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, due to this indexing rotation, the pull-down cylinder 27 provided on the measurement reference table 14 is placed in the T-slot 26a of the hook member 26 fixed to the lower part of the jig mounting table 25. portion 27a is engaged, and after the turntable 20 is lowered, the pull-down cylinder 27 is activated and the three-point support surface 25c is
is pressed against the upper surface 14a of the measurement reference table 14. As a result, the jig mounting base 25 indexed by the measurement station MS is accurately positioned in the vertical direction with respect to the bed 10.

As shown in FIG. 1, a shallow cylindrical recess 25a provided at the top of the jig mount 25 has a plurality of types of inspection jigs 28.
is mounted and supported in a detachable manner. The outer periphery of the second inspection jig has a diameter that fits into the inner periphery of the recess 25a,
A three-point support surface 28b that is supported by contacting the support surface 25b of the recess 25a is formed on the lower side thereof. 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 a plurality of types of shaft assemblies (shaft workpieces) W as shown in FIG. A recessed portion having a three-point support surface 28a that abuts and supports the lower measurement surface Wl is formed.

As shown in FIGS. 1 and 2, the two guide tubes 32 fixed to the upper support plate 12 each support the pilot par 31 so as to be slidable in the vertical direction. The rad 30 is movable in the vertical direction coaxially above the jig mount 25 indexed by the measurement station MS. The measuring head 30 is
It is connected to the lower end of a piston rod 33a of a lifting cylinder 33 provided on the upper support plate 12 coaxially with this, and is driven up and down. A support portion 30a integrally provided at the bottom of the measurement head 30 is formed with a horizontal support groove 30d into which a carrier 38 holding a plurality of types of measurement gauges 37 (to be described later) movably in the vertical direction is mounted. There is. The lower side of the support groove 30d is mostly open except for the support surfaces 30e on both sides that support the carrier 38, as shown in FIG. As shown in FIGS. 1 and 6, a contact ring 30b is fixed to the center of the upper surface of the support groove 30d, and a three-point contact surface 30c on the lower surface can come into contact with the upper surface 37b of the measuring gauge 37. As shown in FIGS. 1 and 2, a scale 35 is vertically fixed to the upper support plate 12, and a scale 35 is fixed to the measurement head 30.
A detection head 34 is fixed via a bracket 36 to cooperate with the detection head 34 to measure the amount of relative movement between the two 12 and 30.

As shown in FIGS. 2 to 5, on the lower side of the upper support plate 12 there is a measuring gauge for automatically attaching and detaching a predetermined one of a plurality of types of measuring gauges 37 and a carrier 38 to and from the measuring rod 30. A replacement device 40 is provided.Inspection gauge replacement device 40
The main part is a carrier 38 that carries multiple types of inspection gauges 37.
a magazine 4 that is held together with the magazine 4 and moves in the longitudinal direction according to a command from the control device to index a predetermined item to a predetermined position P to be described later;
1 and a gauge exchange cylinder 47 for attaching and detaching the inspection gauge 37 and carrier 38 indexed to a predetermined position P to and from the measurement head 30. As shown in FIG. 5, two rails 42 are fixed to the lower surface of the upper support plate 12 through brackets t-42a in a direction perpendicular to the support groove 30d of the measuring head 30, and these rails 42 are used to secure the guide groove member 41a. A magazine 41 is guided and supported in the longitudinal direction via the. Magazine 4
A plurality of holding members 43 each having a holding groove 43a parallel to the support groove 30d of the measuring head 30 and having the same inner surface shape are provided along the longitudinal direction on the lower surface of the measuring head 1. Each holding member 43 holds each carrier 38 with support surfaces 43 on both sides of the lower side.
It is held in such a way that it can be inserted and removed along the holding groove 43a having a diameter b, and that it cannot be removed by itself 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, and the test piece is loosely fitted into these holes 38a, 38b. The measuring gauge 37 has a flange 37c on its upper outer periphery that has both holes 38.
It is supported so as to be movable upward by being engaged with a stepped portion at the boundary between portions a and 38b. A hook portion 39 having a T-slot 39a is fixed to the gauge exchange cylinder 47 side of each carrier 38, and a cutout 39b is provided at the upper center of the hook portion 39, as shown in FIG. As shown in FIGS. 6 and 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 stepped portions having three-point gauge surfaces 37a that can come into contact with the upper measurement surface W2 are formed,
A tapered surface that guides the upper bearing wb is formed continuously below each step. The number of steps and the inner diameter of this stepped portion depend on the outer diameter of the upper bearing wb of the plurality of shaft assemblies W to be measured.
It is assumed that each measurement gauge 37 is different.

As shown in FIG. 3 and FIG.
4, the %Ji of the piston loft 44a is magazine 4.
The holding member 43 that holds a predetermined measuring gauge 37 is fixed to the lug 45 of the measuring head 30 and is actuated by a command from a control device (not shown) to drive the magazine 41 in the longitudinal direction. The predetermined position P corresponding to 30a is determined. As shown in FIG. 5, the holding member 43 is indexed to a predetermined position P and the measuring head 30 is located at the highest end.
Between the supporting parts 30a, both 30a.

A gauge guide rail 53 is fixed to the upper support plate 12 via a bracket 54, and has a guide groove 53a continuous with the grooves 30d and 43a of 43 and having similar support surfaces 53b on both lower sides. 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 block 52 (D groove 52a), 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 36 corresponding to a predetermined position P.

When the piston rod 47a of the gauge conversion cylinder 47 is in the retracted state, the engager 47b at the tip thereof is held by each holding member 43 of the magazine 41 indexed in the longitudinal direction, as shown by the two-dot chain line in FIG. A predetermined measuring gauge 37 is indexed to a predetermined position P, and an engaging element 47b is engaged in the T-groove 39a of the hook member 39 of the carrier 38 in sequence. When the piston rod 47a of the gauge conversion cylinder 47 is extended in the engaged state, the carrier 38 supporting the measurement gauge 37 is pushed out of the holding groove 43a of the holding member 43 and passes through the guide groove 53a of the gauge guide rail 53. and is inserted into the support groove 30d of the measuring head 30. Below the piston rod 47a, a bracket 4 is placed parallel to the piston rod 47a.
A pilot bar 48 is provided which is guided by a guide cylinder 49 fixed to the piston rod 6, 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 in the connecting member 50 engages with the engagement hole 53c of the gauge guide member 53 when the piston rod 47a is in the most extended state, and in this state, the engagement pin 50a is engaged with the engagement hole 53c of the gauge guide member 53. This prevents the tip from bending.

In the state shown in FIG. 5 in which the carrier 38 is attached to the measuring head 30 together with the measuring gauge 37, if the piston rod 33a of the lifting cylinder 33 is extended, the engaging element 47b will be removed from the T-slot 39a by the notch 39b, but the carrier 38 is positioned by a detent mechanism (not shown) or the like, so that it does not move within the support groove 30d. The carrier 38 and the inspection gauge 37 are connected to the lifting cylinder 3
As shown in FIG. 1, the upper measurement surface W2 of the shaft assembly W has the lower measurement surface W1 supported on the three-point support surface 28a of the inspection jig 28. The 3-point gauge surface 37a of the measurement gauge 37 contacts the 3-point contact surface 37a of the measurement gauge 37, and then the upper surface 37b of the measurement gauge 37 contacts the 3-point contact surface 30c of the measurement head 30, and the lifting cylinder 33 lifts each bearing Wa.
, Wb is given a predetermined preload. In this state, the operator rotates the shaft assembly W by hand to adjust it, then gives a measurement command, and the detection head 34 detects the upper surface 14a of the measurement reference table 14.
and the distance ME between the three-point contact surfaces 30c of the measurement head 30, and the lower and upper measurement surfaces Wl, W of the shaft assembly W are measured using the following formula.
Find the shaft height A between 2.

A=E-(F+G+H) However, F: Predetermined three-point gauge surface 37a of the inspection gauge 37
and the upper surface 37b: Distance H between the upper and lower three-point support surfaces 23a and 28b of the inspection jig 28: Distance 1 between the upper and lower support surfaces 25b and the three-point support surface 25c of the jig mounting base 25 ( When the measurement of the shaft height A of the shaft assembly W of II is completed, the measuring head 30 is returned to the uppermost position by the lifting cylinder 33, and the piston rod 4 is placed in the T groove 9a of the carrier 38.
7a is engaged with the engaging element 47b at the tip. Next, the piston rod 47a is retracted and the carrier 38 is moved to the measuring gauge 37.
At the same time, the magazine 41 is returned to the holding member 43 of the magazine 41, and the dowel pin 51a is pulled out using the positioning cylinder 51, and the magazine indexing cylinder 44 is operated to move the holding member 43 of the carrier 38 holding the measuring gauge 37 to be used next to a predetermined position. Index to position P. In parallel with the above, the table indexing device 21 is operated to rotate the turntable 20 to index the next shaft assembly W to the measurement station MS, and the shaft height of the next shaft assembly W is determined in the same manner as described above. Measure.

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 axes of the transmission, the type of each shaft assembly to be measured, the inspection jig and the inspection 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 does not change, 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 to sixth stations 82 to S6 are replaced.
Repeat the above operations for 6th station S6
When the replacement of the inspection jig 28 and the shaft assembly W is completed, the process proceeds from step 84 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. The measurement gauge 37 attached to the head 30,
Inspection gauge exchange device 4 that operates in response to commands from the control device
0, it is replaced with a predetermined one. In the next step 87, as described above, the measuring head 30 is lowered by the lifting cylinder 35 to re-measure the surfaces Wl, W of both bearings Wa, Wb.
After measuring the shaft height dimension A between the two, the dimension on the housing side of the reducer shown in FIG. 10 measured by a separate measuring device is read in step 88, and the spacer thickness t is calculated using the following formula.

t= (B10+D)-(A+α) However, B: height of housing X C, D: depth of bearing hole of cover Y, Z: bearing Wa, W
After calculating the spacer thickness t of the shaft assembly W supported by the second station S2 by a constant value or more for giving a preload to b, the process returns from step 89 to step 85, and the third to sixth and first stations 3
3-36. Repeat the above operation for Sl. 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 through 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 (Sl-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 replaced by the measurement gauge exchange device 4.
Since the measurement is performed automatically based on 0, the efficiency of the measurement work is further improved. Furthermore, it is also possible to automatically replace the inspection jig 28 and the shaft assembly W at the attachment/detachment station FS using 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 a shaft assembly as in this embodiment, but can also be used to measure the shaft height between the entire length of a normal shaft workpiece or between intermediate steps. It can also be used for

[BRIEF DESCRIPTION OF THE DRAWINGS] The drawing shows an embodiment of the shaft height measuring device according to the present invention.
Figure 1 is a cross-sectional view of the main parts and corresponds to the cross-sectional view taken along the line I-■ in Figure 2. Figure 2 is an overall front view, Figure 3 is an overall plan view, and Figure 4 is a general plan view.
The figure is an overall right side view excluding the jig storage box, Figure 5 is an enlarged sectional view taken along line V-V in Figure 3, and Figure 6 is the vi of Figure 5.
-vr sectional view, FIG. 7 is a bottom view of the inspection gauge, FIG. 8 is a flowchart when the present invention is used for assembling a reducer, FIG. 9 is a diagram showing an example of a shaft assembly to be measured, 1st
Figure 0 is a diagram showing the housing of the reducer. Explanation of symbols 10... Bed, 12... Support member (upper support plate)
, 20... turntable, 21... indexing device (table indexing device), 25... jig mounting base, 28...
Inspection jig, 28a...Support surface (3-point support surface), 30.
... Measuring head, 34... Detection head, 37... Inspection gauge, 37a... Gauge surface (3-point gauge surface), F
S: attachment/detachment station, MS: measurement station, 0: vertical axis, W: shaft workpiece (shaft assembly), Wl: lower measurement surface, W2: upper measurement surface. Applicant: Toyota Machine Machinery Co., Ltd. (1 other person) Representative: Patent attorney Teru Hase (1 other person) Figure 9 Figure 10

Claims (1)

[Claims] 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 plurality of types of inspection gauges each having a gauge surface that abuts the upper measurement surface of the shaft workpiece. , a plurality of jig mounts for removably mounting and supporting at least one type of said inspection jig, and a plurality of jig mounts supported on the bed rotatably around a vertical axis and equally divided along the circumferential direction. a turntable that supports each of the jig mounts at a position and is rotationally driven by an indexing device to index each jig mount to the attachment/detachment station on the bed and the measurement station; a measurement head that is vertically movably supported by a support member fixed to the bed above a tool mounting base and that hangs and supports a plurality of types of measurement gauges in a detachable manner;
A shaft height measuring device comprising a detection head that measures the relative movement amount between the measurement head and the support member.