JPH0438285B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a shaft height measuring device suitable for measuring 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 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. In contrast, a plurality of inspection jigs that respectively support the lower measurement surface of each axis in a set are installed on the turntable along the circumferential direction, and each of these inspection jigs is rotated around the turntable. It is conceivable to solve the above problem by eliminating manual replacement of the measuring jig by moving the measuring jig to a predetermined measuring position. However, in this case, each inspection jig is supported by the bed, which is the reference for measurement, through the rotating turntable, so there is no error in mounting the turntable in the height direction with respect to the bed, and the inclination of the turntable There is a problem in that the measurement accuracy of the height dimension decreases due to variations in the height direction of each measuring jig due to rotation, deflection of the turntable due to measurement pressure, etc. The present invention supports a jig mount equipped with an inspection jig so that it can slide vertically relative to a turntable, and during measurement, this jig mount is pressed against the top surface of a measurement reference table fixed on a bed. The above-mentioned problems were solved by positioning the inspection jig on the bed.

[Means for solving problems]

For this purpose, the shaft height measuring device according to the invention comprises:
As illustrated in the illustrated embodiment, a measurement reference stand 14 is fixed to a measurement station MS on a bed 10.
and an inspection jig 28 having a support surface 28a that abuts and supports the lower measurement surface W1 of the shaft workpiece W.
A plurality of jig mounting bases 25 having a a turntable 20 that supports the table so as to be slidable in the vertical direction and is rotationally driven by an indexing device 21 to index each jig mount 25 to the upper side of the measurement reference table 14; The lower surface 25c of the jig mounting base 25
A pressing device 27 that presses the upper surface 14a of the measurement reference table 14, and a support member 12 fixed to the bed 10 above the measurement reference table 14, which is supported movably in the vertical direction and on the upper side of the shaft workpiece W. Gauge surface 37a that comes into contact with measurement surface W2
The measuring head 30 is provided with a measuring head 30 which suspends and supports a measuring gauge 37, and a detecting head 34 which measures the amount of relative movement between the measuring head and the supporting member 12.

[Effect]

The predetermined jig mounting base 25 is a turntable 20
is indexed to the upper side of the measurement standard stand 14 fixed to the measurement station MS, and its lower surface 2
5c is pressed against the upper surface 14a of the measurement reference table 14 by the pressing device 27, and is positioned in the vertical direction with respect to the bed 10. In this state, the measurement head 30 is lowered and the lower measurement surface W1 is brought into contact with the contact surface 28a.
The gauge surface 37a is brought into contact with the upper surface measurement surface W2 of the shaft workpiece W supported on the inspection jig 28 of the jig mounting base 25, and the detection head 34 is used to detect both measurement surfaces W1, Measure the shaft height between W2. When the measurement is completed, the pressing device 27 is released and the next jig mounting base 25 is moved to the measurement station MS.
The shaft height of the next shaft workpiece W is measured in the same manner.

〔Effect of the invention〕

As described above, according to the present invention, the jig mount having the measuring jig on the upper part that supports the shaft workpiece, when indexed to the measuring station,
Since it is directly pressed against the top surface of the measuring standard table fixed on the bed, the vertical positioning with respect to the bed, which is the reference for measurement, can be performed accurately, thus improving the accuracy of measuring the shaft height of the shaft workpiece. . Moreover, the turntable only needs to perform rotational indexing of the jig mounting base, and there is no need to increase mounting accuracy or rigidity in the height direction, inclination direction, etc., so the structure can be simplified and lightened.

〔Example〕

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

As shown in FIGS. 1 to 3, 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. There are four upper support plates 12 that support the head 30 in a vertically movable manner.
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. A jig storage box 13 for storing the inspection jig 28 is installed on one side of the bed 10 located on the side of the attachment/detachment station FS for attaching and detaching the inspection jig 28 and the shaft workpiece W, which will be described later. An inspection operation panel 16 is provided on the left and right sides. On the bed 10 is a measuring station.
A measurement reference stand 14 is fixed at the position of the 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 indexed above a measurement reference stand 14 fixed to the measurement station MS. Prior to this rotation, the turntable 20 rises a little, and the upper surface 22b of the flange 22a on the upper part of the support tube 22 comes into contact with the lower surface 25e of the flange portion 25d of the jig mount 25, lifting the jig mount 25.
As a result, the support surfaces 25c (hereinafter simply referred to as three-point support surfaces) provided protrudingly at three locations on the circumference of the lower surface of the jig mounting table 25 are in a state that they are somewhat separated above the upper surface 14a of the measurement reference table 14. Indexing is performed. When the indexing is completed, the turntable 20 is lowered, and as shown in FIG.
There is a slight gap between 5e. Due to this indexing rotation, the head 27a of the rod of the pull-down cylinder 27 provided on the measurement reference table 14 engages with the T-groove 26a of the hook member 26 fixed to the lower part of the jig mounting table 25. After the turntable 20 is lowered, the pull-down cylinder 27 is activated, and the three-point support surface 25c is moved to the upper surface 14 of the measurement reference table 14.
It is designed to be pressed by a. As a result, the jig mounting base 2 is indexed to the measuring station MS.
5 is accurately positioned in the vertical direction with respect to the bed 10.

As shown in FIG. 1, a measuring jig 28 is removably placed and supported in a shallow cylindrical recess 25a provided at the top of the jig mounting base 25. The outer periphery of the inspection jig 28 has a diameter that fits into the inner periphery of the recess 25a, and a three-point support surface 28b that is supported by contacting the support surface 25b of the recess 25a is provided on the lower side.
is formed. In addition, the upper side of each inspection jig 28 has an inner diameter that fits on the outer periphery of the lower bearing Wa of a different shaft assembly (shaft workpiece) W, and abuts on the lower surface (lower measurement surface) W1 of the lower bearing Wa. A recessed portion having a three-point support surface 28a is formed to support this.

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 mounting base 25 indexed above the measurement reference base 14. 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 a support portion 30a integrally provided at the lower part of the 0, into which a carrier 38 holding a plurality of types of measurement gauges 37 is mounted. The lower side of the support groove 30d is the carrier 3
Most of the support surfaces 30e on both sides supporting 8 are open.

The 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 a measuring gauge 37 is loosely fitted into these holes 38a and 38b.
, the flange 37c on the upper outer periphery has both holes 38
It is supported so as to be movable upward by being engaged with a stepped portion at the boundary between a and 38b. Figure 1 shows the measurement gauge 3
7 is moved upward and its upper surface 37b is in contact with the three-point contact surface 30b of the contact ring 30b fixed to the measuring head 30. A hook portion 39 is fixed to the carrier 38 and engages with the tip of a piston rod of a gauge exchange cylinder 47, which will be described later. The lower inner surface of the measurement gauge 37 has an inner diameter that fits into the outer periphery of the upper bearing Wb of the shaft assembly W,
Three-point gauge surface 3 that can come into contact with the upper measurement surface W2
7a are formed, and a tapered surface that guides the upper bearing Wb is formed continuously below each step. The number of steps and the inner diameter of the stepped portion are different for each measurement gauge 37 depending on the outer diameter of the upper bearing Wb of the plurality of shaft assemblies W to be measured.

As shown in FIGS. 1 and 2, the upper support plate 12
A scale 35 is fixed in a vertical direction, and a detection head 34 is fixed to the measuring head 30 via a bracket 36, which cooperates with the scale 35 to measure the relative movement of both 12 and 30. .

As shown in FIGS. 2 and 3, the upper support plate 12
At the bottom, a measuring head 30 automatically measures a predetermined one out of multiple types of measuring gauges 37 and carriers 38.
An inspection gauge exchange device 40 that can be attached and detached is provided. The main part of the test gauge exchange device 40 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 shown in FIG. 3. This is a gauge exchange cylinder 47 for attaching and detaching a magazine 41, a measuring gauge 37 indexed to a predetermined position P, and a carrier 38 to and detaching from the measuring head 30 located at the highest end.

As shown in FIG.
With the lower measurement surface W1 in contact with the point support surface 28a and the shaft assembly W supported, the carrier 38
The measuring head 30 equipped with the measuring gauge 37 is driven down by the lifting cylinder 33, and the measuring head 30 is lowered by the lifting cylinder 33, and the three-point gauge surface (in the embodiment, the middle three points) of the measuring gauge 37 is placed on the upper measuring surface W2 of the shaft assembly W. Gauge surface) 3
7a comes into contact with the upper surface 37 of the inspection gauge 37.
b comes into contact with the three-point contact surface 30c of the measurement 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 detects the three-point contact surface 30c between the top surface 14a of the measurement reference table 14 and the measurement head 30.
The distance E is measured, and the shaft height A between the lower and upper measurement surfaces W1 and W2 of the shaft assembly W is determined by the following equation.

A=E-(F+G+H) However, F: Distance between the predetermined 3-point gauge surface 37a of the inspection gauge 37 and the upper surface 37b G: Upper and lower 3-point support surfaces 2 of the inspection jig 28
Distance between 8a and 28b H: Distance between support surface 25b and bottom surface 25c of jig mounting base 25 When the measurement of the shaft height A of one shaft assembly W is completed, the measuring head 30 is moved by the lifting cylinder 33. Return to the highest point and remove the inspection gauge 37 and carrier 38
is converted into the one to be used next, and at the same time, the table indexing device 21 is activated to set the turntable 2.
0, the jig mounting base 15 supporting the next shaft assembly W is indexed above the measurement reference stage 14, and the shaft height of the next shaft assembly W is measured in the same manner as described above.

In the embodiment described above, the turntable 20
The lower surface 25c of the jig mount 25 is brought into contact with the upper surface 14a of the measurement reference table 14 by moving the jig mount 25 up and down. The upward and downward movement of the turntable may be omitted by pulling down the jig mount indexed upward against the spring by a pressing device and pressing it above the measurement reference table.

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 drawings]

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. Explanation of symbols 10... Bed, 12... Support member (upper support plate), 14... Measurement reference stand, 14a... Top surface, 20... Turntable, 21... Indexing device (table indexing device) 25... Jig mounting base, 25c... Lower surface (3-point support surface), 27... Pressing device (pull-down cylinder), 28... Inspection jig, 28a... Support surface (3-point support surface), 30... Measurement head, 34... Detection head,
37...Inspection gauge, 37a...Gauge surface (3-point gauge surface), 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)

[Claims] 1. A measurement reference stand fixed to a measurement station on the bed, and a plurality of jig mounting bases each having an inspection jig on the upper part having a support surface that contacts and supports the lower measurement surface of the shaft workpiece. , supported on the bed so as to be rotatable around a vertical axis, and supporting each of the jig mounting bases so as to be slidable in the vertical direction at a plurality of positions equally divided along the circumferential direction, and rotationally driven by an indexing device; a turntable that indexes each jig mounting base to the upper side of the measurement reference base; a pressing device that presses the lower surface of the jig mounting base that is indexed to the upper side of the measurement reference base against the upper surface of the measurement reference base; A measurement head that is supported vertically movably above the measurement reference table by a support member fixed to the bed and that suspends and supports an inspection gauge that has a gauge surface that comes into contact with the upper measurement surface of the shaft workpiece. ,
A shaft height measuring device comprising a detection head for measuring the amount of relative movement between the measuring head and the support member.