CN110823052A - Device and method for detecting throat diameter and center distance installation position of double-envelope worm gear speed reducer - Google Patents
Device and method for detecting throat diameter and center distance installation position of double-envelope worm gear speed reducer Download PDFInfo
- Publication number
- CN110823052A CN110823052A CN201911293457.5A CN201911293457A CN110823052A CN 110823052 A CN110823052 A CN 110823052A CN 201911293457 A CN201911293457 A CN 201911293457A CN 110823052 A CN110823052 A CN 110823052A
- Authority
- CN
- China
- Prior art keywords
- worm
- worm gear
- measuring
- distance
- plane
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/0002—Arrangements for supporting, fixing or guiding the measuring instrument or the object to be measured
- G01B5/0004—Supports
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/14—Measuring arrangements characterised by the use of mechanical techniques for measuring distance or clearance between spaced objects or spaced apertures
Abstract
The device comprises a measuring block, a clamping spring, a dial indicator and a height gauge, wherein the measuring block is used for simulating the center position of a worm gear, the measuring block is a centering measuring block which is used as the center of an actual worm and is obtained by evenly dividing and cutting a worm gear finished product processed by the upper limit of the diameter tolerance of a worm gear tooth part through the center of the worm gear, a plane which is tangent with the center point of the worm gear is cut on one side of the measuring block with the opposite side of the tooth part surface of the worm gear, a hole is formed in the measuring block, the center line of the hole is vertically intersected with the straight line where the plane is located, and the clamping spring is penetrated in the hole and clamps the measuring block on the worm. The detection method does not need a special detection instrument, reduces the assembly cost, can use a common conventional measuring instrument to finish detection in a common machining factory, has no high requirement on the technical operation level of measuring personnel, can finish the measurement work by one person, and avoids the problems of time and labor waste and low assembly precision of the conventional worm gear assembly which needs painting and is used for grinding and adjusting.
Description
Technical Field
The invention relates to the technical field of production of worm gear speed reducers, in particular to a device and a method for detecting throat diameters and center distances of double-enveloping worm gear speed reducers.
Background
The worm wheel is an important component of the speed reducer, in the double-enveloping worm gear speed reducer, axial force applied to the worm and the worm wheel in the meshing transmission process is large, and a common bearing is difficult to prevent the worm from axially moving, so that the transmission precision between the worm and the worm wheel is influenced, and the product quality of the speed reducer is influenced.
Disclosure of Invention
The invention provides a method for conveniently and simply determining the installation position sizes of the axial direction of the worm and the axial direction of the worm wheel in the process of assembling the worm gear pair so as to ensure the precision requirement of the meshing position after the double-envelope worm gear pair is assembled.
The technical scheme adopted by the invention is as follows:
throat diameter and central moment mounted position detection device of double envelope worm gear speed reducer, including simulation worm wheel central point put with measuring block and clamp the spring, measuring block is for the worm wheel finished product that uses worm wheel tooth portion diameter tolerance upper limit to process out through the equal partition cutting play of worm wheel center as the measuring block in finding of actual worm center, on having worm wheel tooth portion to cut out the plane of cutting out with the worm wheel central point with opposite one side on the measuring block, set up porosely on the measuring block, the central line in hole and the straight line perpendicular crossing at plane place, press from both sides the spring to cross and press from both sides the measuring block in the hole and press from both sides tightly on the worm, still including height gauge and the percentage table that is used for examining on the measuring block and closes the plane levelness with the worm wheel central point.
The method for detecting the throat diameter and center distance installation positions of the double-enveloping worm gear reducer comprises the following steps:
measuring the throat diameter position of the worm: an annular flat cushion block is arranged on the working table surface, the worm is vertically fixed on the annular flat cushion block, and the throat diameter position of the worm is measured by a worm throat diameter position measuring device, namely the distance A between the upper plane of the annular flat cushion block and the central plane of the worm shaft;
(II) measuring the throat diameter position of a worm on the worm gear box body: namely, the distance between the rotation center of the worm wheel and the throat diameter center of the worm is measured, an annular flat cushion block is arranged on a working table, the worm wheel is supported and fixed on the working table through a worm wheel supporting bearing radial positioning frame, the worm wheel supporting bearing radial positioning frame is fixed at the worm wheel supporting bearing radial positioning hole on the worm wheel, the central line of the worm wheel is parallel to the working table, an end face frame for one end of the worm wheel to be attached to is arranged on the working table and is vertical to the working table, one side of the end face frame is a vertical plane, one side of the vertical plane of the end face frame is tightly attached to a supporting box end face frame for supporting a speed reducer box body, the bottom surface of the supporting box end face frame is flatly pressed against and compacted with the annular flat cushion block, the distance C between the lowest point of the radial positioning hole of the worm wheel supporting bearing and the upper plane of the annular flat cushion block, the distance B between the rotation center of the worm wheel and the bottom surface of the end face frame of the supporting box body is equal to D/2-C, and the distance B between the rotation center of the worm wheel and the upper plane of the annular flat cushion block is also equal to D/2-C;
(III) calculating the installation position of the throat diameter position of the worm on the box body: and (2) measuring the distance A between the central plane of the worm shaft and the upper plane of the annular flat cushion block in the step (I), obtaining the distance B between the rotation center of the worm wheel in the box body and the bottom surface of the end face frame of the supporting box body in the step (II), calculating to obtain the distance B-A between the worm part on the box body and the bottom surface of the end face frame of the supporting box body, and detecting and determining by using a depth gauge or assembling and compacting an adjusting washer in the distance between the worm and the bottom surface of the end face frame of the supporting box body in advance.
The method for measuring the throat diameter position of the worm by the worm throat diameter position measuring device comprises the following steps: the measuring block is clamped on the worm by a clamping spring penetrating through a hole in the measuring block, so that the tooth profile of the outline tooth part of the measuring block is meshed with the throat diameter part of the worm, the levelness of the plane, which is in fit with the central point of the worm wheel, on the measuring block is detected by a height gauge and a dial indicator, and when the plane, which is in fit with the central point of the worm wheel, on the measuring block is in the horizontal position, the distance A between the upper plane of the annular flat cushion block and the central plane of the worm shaft is measured.
In the method for measuring the throat diameter position of the worm by using the device for measuring the throat diameter position of the worm, when the plane on the measuring block, which is in line with the central point of the worm wheel, is not level by using a dial indicator and a height gauge, the measuring block is slightly rotated leftwards or rightwards around the circumference of the worm until the plane on the measuring block, which is in line with the central point of the worm wheel, is in the horizontal position.
The measurement of the distance C between the lowest point of the radial positioning hole of the worm wheel support bearing and the bottom surface of the end surface frame of the support box body is measured by a dial indicator and a height gauge, the position of the lowest point of the radial positioning hole of the worm wheel support bearing is firstly measured by the dial indicator, and then the distance C between the lowest point and the bottom surface of the end surface frame of the support box body is measured by the height gauge.
The invention has the beneficial effects that: the detection method does not need a special detection instrument, reduces the assembly cost, can use a common conventional measuring instrument to finish detection in a common machining factory, has no high requirement on the technical operation level of measuring personnel, can finish the measurement work by one person, and avoids the problems of time and labor waste and low assembly precision of the conventional worm gear assembly which needs painting and is used for grinding and adjusting.
Drawings
FIG. 1 is a schematic diagram of a measuring block structure according to the present invention.
FIG. 2 is a schematic view of the measurement of the throat diameter of the worm according to the present invention.
FIG. 3 is a schematic diagram of measuring the throat diameter position of a worm on the worm gear box body.
Wherein: 1-measuring block; 2-a plane is matched with the central point of the worm wheel; 3-hole; 4-clamping the spring; 5-a worm; 6-dial indicator; 7-annular flat cushion blocks; 8-a working table; 9-end face frame; 10-supporting the box body end face frame; 11-radial positioning holes of the worm wheel support bearing; 12-a worm wheel.
Detailed Description
Throat diameter and central moment mounted position detection device of double envelope worm gear speed reducer, including simulation worm wheel central point put with measuring block 1 and clamp spring 4, measuring block 1 is for having the worm wheel finished product that worm wheel tooth portion diameter tolerance upper limit processed out through the equal partition cutting in worm wheel center as the measuring block of finding the center of actual worm, on measuring block 1 having worm wheel tooth portion face opposite one side cut out with worm wheel central point coincidence plane 2, set up porosely 3 on measuring block 1, the central line of hole 3 and with the straight line vertical intersection that worm wheel central point coincidence plane 2 belonged to, clamp spring 4 cross-under in hole 3 and press from both sides measuring block 1 tightly on worm 5, still including being used for examining dial indicator 6 and the height gage of the level of coincidence plane 2 with worm wheel central point coincidence plane on measuring block 1.
The present invention will be described in detail with reference to specific examples.
A throat diameter and central moment installation position detection device of a double-envelope worm gear speed reducer comprises a measuring block 1, a clamping spring 4, a dial indicator 6 and a height gauge, wherein the measuring block 1 is a centering measuring block which is used for simulating the central position of a worm gear and is formed by evenly cutting a worm gear finished product processed by the upper limit of the diameter tolerance of a worm gear tooth part through the center of the worm gear to serve as the center of an actual worm, a light-weight surface hardness high-aluminum alloy material is used, the worm gear finished product is processed according to the upper limit of the diameter tolerance of the worm gear tooth part, then the centering measuring block 1 is equally cut by high-precision line equipment through the center of the worm gear, a plane 2 which is tangent to the center point of the worm gear is cut on one side of the measuring block 1 with the opposite tooth part surface of the worm gear, a hole 3 is formed in the measuring block 1, the center line of the hole 3 is vertically intersected with the straight line where the plane 2 is located, the clamping, the height gauge and the dial indicator 6 check the levelness of the plane 2 which is matched with the central point of the worm wheel on the measuring block 1, and when the plane which is matched with the central point of the worm wheel on the measuring block 1 is adjusted, the plane position is the central plane position of the throat diameter of the worm 5.
The method for detecting the throat diameter and center distance installation positions of the double-enveloping worm gear reducer comprises the following steps:
measuring the throat diameter position of the worm: an annular flat cushion block 7 is arranged on the working table surface 8, the worm 5 is vertically fixed on the annular flat cushion block 7, the throat diameter position of the worm 5 is measured by a worm throat diameter position measuring device, the measuring block 1 is clamped on the worm 5 by a clamping spring 4 which penetrates through a hole 3 on the measuring block 1, the tooth part of the outline tooth part of the measuring block 1 is meshed with the tooth shape of the throat diameter part of the worm 5, the levelness of the plane 2 which is matched with the central point of the worm wheel on the measuring block 1 is checked by using a height gauge and a dial indicator 6, when the plane 2 which is matched with the central point of the worm wheel on the measuring block 1 is positioned at the horizontal position, namely, the distance A between the upper plane of the annular flat cushion block 7 and the central plane of the shaft of the worm 5 is measured, when the dial indicator 6 and the height gauge are used for detecting that the plane 2 on the measuring block 1, which is in fit with the central point of the worm wheel, is not flat, and slightly rotating the measuring block 2 to the left or right around the circumference of the worm 5 until the plane 2 on the measuring block 1, which is coincident with the central point of the worm wheel, is in a horizontal position.
(II) measuring the throat diameter position of a worm on the worm gear box body: namely, the distance between the rotation center of a worm wheel 12 and the throat diameter center of a worm 5 is measured, an annular flat cushion block 7 is arranged on a working table 8, the worm wheel 12 is supported and fixed on the working table 8 through a worm wheel supporting bearing radial positioning frame, the worm wheel supporting bearing radial positioning frame is fixed at a worm wheel supporting bearing radial positioning hole 11 on the worm wheel 12, the central line of the worm wheel 12 is parallel to the working table 8, an end face frame 9 for one end of the worm wheel 12 to be attached is arranged on the working table 8 and is vertical to the working table, one side of the end face frame 9 is a vertical plane, one side of the vertical plane of the end face frame 9 is closely attached to a supporting box end face frame 10 for supporting a speed reducer box body, the bottom face of the supporting box body end face frame 10 is flat and compacted with the annular flat cushion block 7, the distance C between the lowest point of the worm wheel supporting bearing radial positioning hole 11 and the upper plane, the measurement of the distance C between the lowest point of the worm wheel support bearing radial positioning hole 11 and the bottom surface of the support box body end surface frame 10 is measured by a dial indicator 6 and a height gauge, the position of the lowest point of the worm wheel support bearing radial positioning hole 11 is firstly measured by the dial indicator 6, the distance C between the lowest point of the worm wheel support bearing radial positioning hole 11 and the bottom surface of the support box body end surface frame 10 is measured by the height gauge, the diameter of the worm wheel support bearing radial positioning hole 11 is D, the distance B between the rotation center of the worm wheel 12 and the bottom surface of the support box body end surface frame 10 is D/2-C, and meanwhile, the distance B between the rotation center of the worm wheel 12 and the upper plane of the annular flat cushion block 7 is also the;
(III) calculating the installation position of the throat diameter position of the worm on the box body: and (2) measuring the distance A between the central plane of the shaft of the worm 5 and the upper plane of the annular flat cushion block 7 in the step (I), and obtaining the distance B between the rotation center of the worm wheel 12 in the box body and the bottom surface of the end face frame 10 of the supporting box body in the step (II), so that the distance B-A between the part of the worm 5 on the box body and the bottom surface of the end face frame 10 of the supporting box body can be calculated, and the distance B-A can be determined by using a depth gauge in the assembling process, or an adjusting washer is assembled in advance and compacted in the distance between the worm 5 and the bottom surface of the end face frame 10 of.
The measurement of the meshing center position of the worm wheel is similar to the mode, the distance from the center of the tooth-shaped throat diameter of the worm wheel 12 to the end face of the matched bearing needs to be measured in advance, the distance from the center of a worm hole on the box body to the end face of the bearing arranged on the box body, the difference value of the two distances is the size of the part to be matched with the adjusting pad, the installation can be concise and accurate after the worm wheel is matched and ground in advance, and the distance from the center of the tooth-shaped throat diameter of the worm wheel 12 to the end face of the matched bearing is measured by adopting a worm throat diameter.
The embodiments of the present invention have been described in detail, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (5)
1. The throat diameter and center distance installation position detection device of the double-envelope worm gear speed reducer is characterized by comprising a measurement block (1) and a clamping spring (4) for simulating the center position of a worm gear, wherein the measurement block (1) is a centering measurement block which is obtained by uniformly cutting a worm gear finished product processed by using the upper limit of the diameter tolerance of a worm gear tooth part through the center of the worm gear and is used as the center of an actual worm, a plane (2) which is tangent to the center point of the worm gear is cut on one side with the opposite side of the worm gear tooth part facing to the measurement block (1), a hole (3) is formed in the measurement block (1), the center line of the hole (3) is vertically intersected with the straight line where the plane (2) which is tangent to the center point of the worm gear is located, the clamping spring (4) penetrates into the hole (3) and clamps the measurement block (1) on,
the device also comprises a dial indicator (6) and a height gauge, wherein the dial indicator is used for checking the levelness of the plane (2) which is matched with the central point of the worm wheel on the measuring block (1).
2. The method for detecting the throat diameter and center distance installation positions of the double-envelope worm gear speed reducer is characterized by comprising the following steps of:
measuring the throat diameter position of the worm: an annular flat cushion block (7) is arranged on the working table top (8), the worm (5) is vertically fixed on the annular flat cushion block (7), and the throat diameter position of the worm (5) is measured by a worm throat diameter position measuring device, namely the distance A between the upper plane of the annular flat cushion block (7) and the axial center plane of the worm (5);
(II) measuring the throat diameter position of a worm on the worm gear box body: namely, the distance between the rotation center of a worm wheel (12) and the throat diameter center of a worm (5) is measured, an annular flat cushion block (7) is arranged on a working table top (8), the worm wheel (12) is supported and fixed on the working table top (8) through a worm wheel supporting bearing radial positioning frame, the worm wheel supporting bearing radial positioning frame is fixed at a worm wheel supporting bearing radial positioning hole (11) on the worm wheel (12), the central line of the worm wheel (12) is parallel to the working table top (8), an end face frame (9) for one end of the worm wheel (12) to be attached to is arranged on the working table top (8) and perpendicular to the working table top, one side of the end face frame (9) is a vertical plane, one side of the vertical plane of the end face frame (9) is closely attached to a supporting box end face frame (10) for supporting a speed reducer box body, the bottom face frame (10) and the annular flat cushion block (7) are horizontally pressed, and the lowest point of the worm wheel supporting bearing radial positioning hole (11 (7) The upper plane is the distance C between the upper plane and the bottom surface (10) of the end surface frame of the supporting box body, the diameter of a radial positioning hole (11) of a worm wheel supporting bearing is D, the distance B between the rotation center distance of the worm wheel (12) and the bottom surface of the end surface frame (10) of the supporting box body is D/2-C, and meanwhile, the distance B between the rotation center of the worm wheel (12) and the upper plane of the annular flat cushion block (7) is also the distance B;
(III) calculating the installation position of the throat diameter position of the worm on the box body: and (2) measuring the distance A between the shaft center plane of the worm (5) and the upper plane of the annular flat cushion block (7) in the step (I), obtaining the distance B between the rotation center of the worm wheel (12) in the box body and the bottom surface of the end face frame (10) supporting the box body in the step (II), and calculating the distance B-A between the part of the worm (5) on the box body and the bottom surface of the end face frame (10) supporting the box body, namely, in the assembling process, detecting and determining by using a depth gauge or assembling and grinding an adjusting washer in advance to be assembled in the distance between the worm (5) and the bottom surface of the end face frame (10) supporting the box body and compacting.
3. The method for detecting the throat diameter and the center distance installation position of the double-enveloping worm gear reducer according to claim 2, wherein the method for measuring the throat diameter position of the worm by using the worm throat diameter position measuring device comprises the following steps: the measuring block (1) is clamped on the worm (5) by a clamping spring (4) penetrating through a hole (3) in the measuring block (1), so that the outline tooth part of the measuring block (1) is meshed with the throat diameter part of the worm (5) in a tooth form, the levelness of a plane (2) which is tangent to the central point of a worm wheel on the measuring block (1) is checked by a height gauge and a dial indicator (6), and when the plane (2) which is tangent to the central point of the worm wheel on the measuring block (1) is in a horizontal position, the distance A between the upper plane of an annular flat cushion block (7) and the central plane of the shaft of the worm (5) is measured.
4. The method for detecting the throat diameter and the center distance of the double-enveloping worm gear reducer according to claim 2 is characterized in that in the method for measuring the position of the throat diameter of the worm by using the device for measuring the position of the throat diameter of the worm, when the plane (2) which is on the measuring block (1) and is in contact with the central point of the worm wheel is not flat, the measuring block (1) is slightly rotated leftwards or rightwards around the circumference of the worm (5) until the plane (2) which is on the measuring block (1) and is in contact with the central point of the worm wheel is in a horizontal position.
5. The method for detecting the throat diameter and the center distance between the worm gear support bearing radial positioning hole and the bottom surface of the support box body end surface frame (10) according to the claim 2 is characterized in that the measurement of the distance C between the lowest point of the worm gear support bearing radial positioning hole (11) and the bottom surface of the support box body end surface frame (10) is measured by a dial indicator (6) and a height gauge, the position of the lowest point of the worm gear support bearing radial positioning hole (11) is firstly measured by the dial indicator (6), and then the distance C between the lowest point of the worm gear support bearing radial positioning hole (11) and the bottom surface of the support box body end surface frame (10) is measured by the height gauge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911293457.5A CN110823052A (en) | 2019-12-16 | 2019-12-16 | Device and method for detecting throat diameter and center distance installation position of double-envelope worm gear speed reducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911293457.5A CN110823052A (en) | 2019-12-16 | 2019-12-16 | Device and method for detecting throat diameter and center distance installation position of double-envelope worm gear speed reducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110823052A true CN110823052A (en) | 2020-02-21 |
Family
ID=69545754
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911293457.5A Pending CN110823052A (en) | 2019-12-16 | 2019-12-16 | Device and method for detecting throat diameter and center distance installation position of double-envelope worm gear speed reducer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110823052A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114012678A (en) * | 2021-10-29 | 2022-02-08 | 重庆钢铁股份有限公司 | Worm wheel adjusting device and method for rolling mill screw-down speed reducer |
-
2019
- 2019-12-16 CN CN201911293457.5A patent/CN110823052A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114012678A (en) * | 2021-10-29 | 2022-02-08 | 重庆钢铁股份有限公司 | Worm wheel adjusting device and method for rolling mill screw-down speed reducer |
| CN114012678B (en) * | 2021-10-29 | 2024-03-29 | 重庆钢铁股份有限公司 | Worm gear adjusting device and method for rolling mill reduction gear |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102200424B (en) | Device and method for measuring verticality of cross shaft | |
| CN207635974U (en) | Measure the combined detection tool of gear ring M values and gear ring circular runout | |
| CN110823052A (en) | Device and method for detecting throat diameter and center distance installation position of double-envelope worm gear speed reducer | |
| CN211085004U (en) | Throat diameter and center moment installation position detection device of double-envelope worm gear speed reducer | |
| CN211317140U (en) | Deep hole step height measuring device | |
| CN217786037U (en) | Herringbone gear equal-height detection device | |
| CN214408478U (en) | Bending sample angle measuring device | |
| CN202582458U (en) | Tapered-hole measuring device for large tapered bore workpieces | |
| CN210802292U (en) | Inner step height measuring device for tubular workpiece with two symmetrical inner steps at two ends | |
| CN202994041U (en) | Measuring tool for selective installation of main-transmission imprinted gasket | |
| CN207189321U (en) | 4th axis center bulb height testing tool | |
| CN107560588B (en) | Turbine welding cavity surface flatness detects frock | |
| CN112710213A (en) | Graphite guide shoe inner circle lapping measuring device | |
| CN217275874U (en) | Gauge for measuring position of outer ring groove of steering gear bearing | |
| CN107504880B (en) | Measuring tool for measuring tapered roller bearing inner ring flange width | |
| CN206160872U (en) | Utensil is examined to symmetry of fork axle blind hole | |
| CN219798145U (en) | Motor shaft boss face size detection tool | |
| CN219551453U (en) | Radial circle runout inspection device for transmission shaft of long-shaft deep-well pump | |
| CN214747857U (en) | Automobile transmission combines gear finishing drift profile of tooth height to examine utensil | |
| CN203479202U (en) | Test tool for location degree of output shaft spiral groove | |
| CN214747841U (en) | Symmetry gauge for tooth surface of finishing punch of automobile transmission combined tooth | |
| CN213455267U (en) | Engine frame center distance detection tool | |
| CN212007030U (en) | Rolling bearing movable clearance measuring device | |
| CN108007290B (en) | Wheel hub unit ditch position detection gauge | |
| CN202062258U (en) | Measuring tool for crossed line position of straight hole and boring hole |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |