CN107421423A - Biserial conical bearing method for measuring axial clearance - Google Patents
Biserial conical bearing method for measuring axial clearance Download PDFInfo
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- CN107421423A CN107421423A CN201710851269.4A CN201710851269A CN107421423A CN 107421423 A CN107421423 A CN 107421423A CN 201710851269 A CN201710851269 A CN 201710851269A CN 107421423 A CN107421423 A CN 107421423A
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- bearing
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- outer ring
- axial
- conical bearing
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- 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
- G01B5/146—Measuring arrangements characterised by the use of mechanical techniques for measuring distance or clearance between spaced objects or spaced apertures measuring play on bearings
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- General Physics & Mathematics (AREA)
- Rolling Contact Bearings (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The present invention relates to a kind of biserial conical bearing method for measuring axial clearance, bearing fixing device by bearing inner race by axial both ends clamp in a manner of fix, the outer ring of bearing is vacantly to enable the outer ring of double-row roller bearing with respect to its inner ring axial displacement, bearing is vertically placed, the gauge outfit of dial gauge is beaten in bearing outer ring axial end horizontal plane, dial gauge and position of bearings are relatively fixed, stirring the outer ring of bearing makes outer ring obtain percentage meter reading with respect to the whereabouts displacement of bearing inner race axial direction；Upset bearing fixing device causes bearing and the synchronous 180 ° of axial turnings of dial gauge, and stirring the outer ring of bearing makes outer ring obtain percentage meter reading with respect to the whereabouts displacement of bearing inner race axial direction；The difference of dial gauge reading twice is exactly the average end-play of bearing.Realize that end-play detects using turning operation form, there is the advantages of simple to operate, operating efficiency is high.
Description
Technical field
The present invention relates to Bearing testing technology, is specifically biserial conical bearing method for measuring axial clearance.
Background technology
Bearing clearance is also known as bearing clearance.So-called bearing clearance, i.e. spindle are held when not being installed on axle or bearing housing, will
One side of its inner ring or outer ring fixes, movement when then moving radially or axially the loose side of bearing clearance
Amount.According to moving direction, end-play and end-play can be divided into.
The measurement of end-play has two methods at present：Trail and error procedure and the direct method of measurement during assembling（There are load, no-load）.Assembling
When trail and error procedure measure when need to measure each element size, then directly mutually add and subtract；It is a kind of conventional measurement to have load measurement
Method, need to load certain load during measurement.There is use at both approaches scene, but no-load measurement accuracy is relatively
It is high.
The content of the invention
Objects of the present invention：The defects of to overcome prior art to exist, the present invention provide one kind and utilize turning operation shape
Formula realizes the biserial conical bearing method for measuring axial clearance of end-play detection, has simple to operate, high excellent of operating efficiency
Point.
To achieve the above object, the invention provides following technical scheme：
A kind of biserial conical bearing method for measuring axial clearance, is carried out according to the following steps：Step 1: will by bearing fixing device
Double-row conical bearing inner ring is fixed in a manner of axial both ends clamp, and the outer ring of double-row conical bearing is vacantly to cause
The outer ring of double-row roller bearing can vertically place double-row conical bearing with respect to its inner ring axial displacement, dial gauge
Gauge outfit is beaten in double-row tapered roller bearing outer ring axial end horizontal plane, and dial gauge and double-row conical bearing position is relatively solid
Fixed, stirring the outer ring of double-row conical bearing makes outer ring be obtained with respect to the whereabouts displacement of double-row conical bearing inner ring axial direction
Percentage meter reading a；
Step 2,180 ° of axial direction upset bearing fixing devices cause double-row conical bearing and the synchronous 180 ° of axial directions of dial gauge to turn over
Turn, stirring the outer ring of double-row conical bearing makes outer ring be obtained with respect to the whereabouts displacement of double-row conical bearing inner ring axial direction
Percentage meter reading b；
Average end-play c=percentage meter reading a- percentage meter readings b of double-row conical bearing is obtained by calculating.
By using above-mentioned technical proposal, bearing fixing device avoids to the inner ring axial grip of double-row conical bearing
The bearing sequence of sanqu songs within a particular musical mode, the outer ring of double-row conical bearing are vacantly axially movable to cause double-row conical bearing in end-play
Displacement is realized under effect, dial gauge measures corresponding reading a, afterwards directly overturns double-row conical bearing 180 degree（
Put）So that double-row conical bearing realizes displacement under end-play effect, and dial gauge measures corresponding reading b, and difference is read
Number a, b difference are just the average end-play c of double-row conical bearing, and end-play c is positive number.
Preferably, the bearing fixing device includes rocker, and the upset that rocker can be 180 ° is arranged on a pedestal, rocker
Include bearing mounting base, bearing mounting base is provided with horizontal positioned for double-row conical bearing inner ring and realizes biserial
The hanging base station in taper roll bearing outer ring, and inner ring of the double-row conical bearing inner ring axial locking on base station is locked
Gu component, there is bearing mounting base the first test position that base station level places upward and bearing mounting base to rotate 180 °
The second test position that base station level is placed down afterwards, dial gauge are fixedly mounted on rocker, double-row tapered roller bearing outer ring
On be set with outer ring overcoat, outer ring overcoat is suspended on bearing mounting base, and there is outer ring overcoat fixed cover to be loaded on biserial circular cone
Sleeve on roller bearing outer ring, sleeve have bottom, and the outer surface at the bottom is provided with the measurement datum coordinated for dial gauge gauge outfit,
Base station is parallel with measurement datum.Under the structure design, the inner ring axial end of double-row conical bearing is supported on base station,
And be fixed on by inner ring locked assembly on base station, now the outer ring of double-row conical bearing is axially hanging, is achieved in that axle
Inner ring has axial movement space to bearing outer-ring to axial, and outer ring overcoat is fixedly set in into double-row tapered roller bearing outer ring
On, the gauge outfit of dial gauge is beaten on the measurement datum on the overcoat of outer ring, i.e., now, bearing mounting base is in the first detecting position
Put, stir outer ring overcoat（The outer ring concomitant rotation of double-row conical bearing）, after the completion of one-shot measurement, rocker is overturn, is completed
Double measurement operates；With the advantages of simple in construction, simple to operate.
Preferably, it is further fixed on vertically mounting swing arm on the bearing mounting base, vertically mounts swing arm and bearing
Mounting base is vertical, and pedestal includes base and the installation riser vertical with base, vertically mount swing arm with installation riser it is parallel,
Vertically mount swing arm to be mounted on installation riser through pivot, also include for keeping bearing mounting base to be located at the first detecting position
Put the positioner with the second test position.Under the structure design, the assembling structure of bearing mounting base and pedestal is simple, assembling
It is convenient.
Preferably, the positioner includes turning in the first test position, the second test position for bearing mounting base
Rocker position of centre of gravity is converted when turning switching to realize the first test position of bearing mounting base holding, the second test position and be in
The balancing weight of horizontality.Under the structure setting, bearing mounting base realizes position after switching position is overturn by balancing weight
Keep and be in plumbness all the time, ensure that the position of bearing mounting base is reliable, keep testing result reliable, and its structure
Simply, it is easy to operate.
Preferably, described balancing weight be vertically snug fit at it is described vertically mount in swing arm, balancing weight is with axle
Mounting base upset is held vertically to mount swing arm and slide vertically.Under the structure design, in turning operation bearing mounting base, together
When realize evolution under balancing weight self gravitation effect, reach bearing mounting base position keep.
Preferably, installed in the vertical swing arm direction that mounts provided with the locating slot longitudinally opened up on riser one side, it is fixed
It is located at the set that mounts for being provided with and being placed on outside pivot in the groove of position, balancing weight slide-and-guide is matched with locating slot, and balancing weight is provided with bar
Shape groove, balancing weight are mounted through bar-shaped trough and put in mounting.Under the structure design, have compact-sized.
Preferably, the inner ring locked assembly includes axial tightening screw rod, U-shaped pressing plate and locking nut, U-shaped pressing plate
Opening be placed on axial tightening screw rod and be located at face base station position, locking nut screw thread spinning on axial tightening screw rod,
Locking nut coordinates with the locking of U-shaped pressing plate, and U-shaped pressing plate is formed between locking nut and base station between U-shaped pressing plate and base station
Axially grip the grasping part of double-row conical bearing inner ring, axial tightening screw rod with axial grip double row tapered roller
Axial locking corresponding to the axial force of sub- bearing inner race is fixed on base station center.Under the structure design, inner ring locked assembly structure
Simply, the disassembling operations of double-row conical bearing are convenient and have the advantages of to double-row conical bearing reliable lock,
Pedestal is avoided to use the process middle (center) bearing sequence of sanqu songs within a particular musical mode.
Preferably, the sleeve of the outer ring overcoat is provided with and led to along the lock-screw through hole radially opened up, lock-screw
Hole screw-internal thread fit, which has to be connected on double-row tapered roller bearing outer ring, compresses screw.Under the structure design, screw-in compresses spiral shell
Nail, compresses screw and is against on the outer ring of double-row conical bearing, realize outer ring overcoat and double-row tapered roller bearing outer ring
It is locked, there is the advantages of simple in construction, easy to operate.
The invention will be further described below in conjunction with the accompanying drawings.
Brief description of the drawings
Fig. 1 is that the specific embodiment of the invention is used for the measurement apparatus of biserial conical bearing method for measuring axial clearance and is in the
One test position state diagram；
Fig. 2 is that the specific embodiment of the invention is used for the measurement apparatus of biserial conical bearing method for measuring axial clearance in the second inspection
Survey location state diagram；
Fig. 3 is that the structural representation after pedestal is omitted in Fig. 1；
Fig. 4 is that the structural representation after pedestal is omitted in Fig. 2；
Fig. 5 is that the blast for the measurement apparatus that the specific embodiment of the invention is used for biserial conical bearing method for measuring axial clearance regards
Figure.
Embodiment
Referring to accompanying drawing 1 ~ 5, a kind of biserial conical bearing method for measuring axial clearance disclosed by the invention, enter according to the following steps
OK：Step 1: bearing fixing device by double-row conical bearing inner ring by axial both ends clamp in a manner of fix, biserial
The outer ring of taper roll bearing is vacantly to enable the outer ring of double-row roller bearing to justify biserial with respect to its inner ring axial displacement
Taper roller bearing is vertically placed, and the gauge outfit of dial gauge is beaten in double-row tapered roller bearing outer ring axial end horizontal plane, by dial gauge
It is relatively fixed with double-row conical bearing position, stirring the outer ring of double-row conical bearing makes outer ring with respect to double row tapered roller
The whereabouts displacement of sub- bearing inner race axial direction, obtain percentage meter reading a；
Step 2,180 ° of axial direction upset bearing fixing devices cause double-row conical bearing and the synchronous 180 ° of axial directions of dial gauge to turn over
Turn, stirring the outer ring of double-row conical bearing makes outer ring be obtained with respect to the whereabouts displacement of double-row conical bearing inner ring axial direction
Percentage meter reading b；
Average end-play c=percentage meter reading a- percentage meter readings b of double-row conical bearing is obtained by calculating.Bearing
Fixing device avoids the bearing sequence of sanqu songs within a particular musical mode to the inner ring axial grip of double-row conical bearing, and the outer ring of double-row conical bearing hangs
Sky is axially movable so that so that double-row conical bearing realizes displacement under end-play effect, dial gauge measures corresponding reading
Number a, afterwards directly overturns double-row conical bearing 180 degree（It is inverted）So that double-row conical bearing is in end-play
Displacement is realized under effect, dial gauge measures corresponding reading b, and difference reading a, b difference are just double-row conical bearing
Average end-play c, end-play c are positive number.Measurement acquisition data are directly perceived, easy to operate.
The bearing fixing device includes rocker 2, and the upset that rocker 2 can be 180 ° is arranged on a pedestal 1, and rocker 2 wraps
Bearing mounting base 21 is included, bearing mounting base 21 is provided with horizontal positioned for the inner ring of double-row conical bearing 9 and realized
The hanging base station 211 in the outer ring of double-row conical bearing 9, and the inner ring locking group by bearing inner race locking on base station 211
Part, bearing mounting base 21 have horizontal the first test position placed upward of base station 211 and the rotation of bearing mounting base
Horizontal the second test position placed down of base station 211, bearing mounting base 21 are provided with dial gauge 3 after 180 °, and dial gauge 3 is right
Outer ring overcoat 4 should be combined with, outer ring overcoat 4 is suspended on bearing mounting base 21, and there is outer ring overcoat 4 fixed cover to be loaded on biserial
Sleeve 41 on taper roll bearing outer ring, sleeve 41 have bottom 42, and the outer surface at the bottom 42 is provided with to be coordinated for the gauge outfit of dial gauge 3
Measurement datum 421, base station 211 is parallel with measurement datum 421.
Described rocker 2, which also includes to be fixedly connected on bearing mounting base 21, vertically mounts swing arm 22, vertical to hang
Dress swing arm 22 is vertical with bearing mounting base 21, and pedestal 1 includes base 11 and the installation riser 12 vertical with base 11, vertically
It is parallel with installation riser 12 to mount swing arm 22, vertically mounts swing arm 22 and is mounted on through pivot 13 on installation riser 12, pivot uses
Screw thread spinning also includes for keeping bearing mounting base 21 to be located at the first test position and the second inspection on installation riser 12
The positioner that location is put.Under the structure design, the assembling structure of bearing mounting base and pedestal is simple, easy to assembly.Bearing
Mounting base enters line range switching position with the motion mode of pendulum, simple to operate.
Further, the positioner includes being used for bearing mounting base 21 in the first test position, the second detecting position
Position of centre of gravity is converted when putting upset switching to realize first test position of the holding of bearing mounting base 21, the second test position and locate
In the balancing weight 23 of horizontality.In the presence of balancing weight so that rocker and the part being installed on rocker are integrally being turned over
Center of gravity is always positioned at pivot lower position during turning, and vertical hanging is realized by gravity, that is, realizes that bearing mounting base is kept
Level, keep testing result reliable, and its is simple in construction, it is easy to operate.
Described balancing weight 23 be vertically snug fit at it is described vertically mount in swing arm 22, balancing weight 23 is with bearing
Mounting base 21, which is overturn, vertically to be mounted swing arm 22 and slides vertically.In turning operation bearing mounting base 21, while in counterweight
Evolution is realized under the self gravitation effect of block 23, the position for reaching bearing mounting base 21 is kept.It is simple to operate.
Swing arm 22 is vertically mounted towards installing on the one side of riser 12 provided with the locating slot 221 longitudinally opened up described, is determined
It is located to be provided with to be placed on outside pivot 13 in the groove 221 of position and mounts set 222, the slide-and-guide of balancing weight 23 is matched with locating slot 221, matched somebody with somebody
Pouring weight 23 is provided with bar-shaped trough 231, and balancing weight 23 is mounted in mounting on set 222 through bar-shaped trough 231.With compact-sized.
In this specific embodiment, the inner ring locked assembly includes axial tightening screw rod 51, U-shaped pressing plate 52 and locking
Nut 53, the opening of U-shaped pressing plate 52 are placed on axial tightening screw rod 51 and are located at the position of face base station 211, the spiral shell of locking nut 53
Line spinning is on axial tightening screw rod 51, and locking nut 53 coordinates with the locking of U-shaped pressing plate 52, and U-shaped pressing plate 52 is located at locking nut
Formed between 53 and base station 211, between U-shaped pressing plate 52 and base station 211 and axially grip the inner ring of double-row conical bearing 9
Grasping part, axial tightening screw rod 51 is with axial locking corresponding with the axial force of axial grip double-row conical bearing inner ring
It is fixed on the center of base station 211.This specific embodiment is provided with the connecting hole of insertion on bearing mounting base, and connecting hole is corresponding in base
The center of platform 211, axial tightening screw rod 51 pass through connecting hole and axial limiting from mounting base away from the side of base station 211,
Inner ring locked assembly is simple in construction, and the disassembling operations of double-row conical bearing are convenient and with to double-row conical bearing
The advantages of reliable lock.Double-row conical bearing inner ring is placed on base station 211, and axial tightening screw rod 51 passes through biserial circular cone
Roller bearing inner ring, locking nut being screwed in advance, avoiding axial tightening screw rod 51 from dropping, U-shaped pressing plate 52 is laterally inserted in axle afterwards
To stretching screw 51, locking nut is tightened, drives U-shaped pressing plate 52 to compress double-row conical bearing inner ring.
The sleeve 41 of the outer ring overcoat 4 is provided with along the lock-screw through hole 411 radially opened up, lock-screw through hole
411 screw-internal thread fits, which have to be connected on double-row tapered roller bearing outer ring, compresses screw 412.Screw-in compresses screw, compresses spiral shell
Nail is against on the outer ring of double-row conical bearing, realizes and outer ring overcoat and double-row tapered roller bearing outer ring are locked,
With the advantages of simple in construction, easy to operate.
Claims (8)
1. a kind of biserial conical bearing method for measuring axial clearance, is carried out according to the following steps：Step 1: pass through bearing fixing device
Double-row conical bearing inner ring is fixed in a manner of axial both ends clamp, the outer ring of double-row conical bearing it is hanging so that
Double-row conical bearing can vertically be placed, dial gauge with respect to its inner ring axial displacement the outer ring for obtaining double-row roller bearing
Gauge outfit beat in double-row tapered roller bearing outer ring axial end horizontal plane, dial gauge and double-row conical bearing position is relative
Fixed, stirring the outer ring of double-row conical bearing makes outer ring be obtained with respect to the whereabouts displacement of double-row conical bearing inner ring axial direction
Obtain percentage meter reading a；
Step 2,180 ° of axial direction upset bearing fixing devices cause double-row conical bearing and the synchronous 180 ° of axial directions of dial gauge to turn over
Turn, stirring the outer ring of double-row conical bearing makes outer ring be obtained with respect to the whereabouts displacement of double-row conical bearing inner ring axial direction
Percentage meter reading b；
Average end-play c=percentage meter reading a- percentage meter readings b of double-row conical bearing is obtained by calculating.
2. biserial conical bearing method for measuring axial clearance according to claim 1, it is characterised in that：The bearing fixes dress
Put including rocker, the upset that rocker can be 180 ° is arranged on a pedestal, and rocker includes bearing mounting base, bearing installation bottom
Plate is provided with horizontal positioned for double-row conical bearing inner ring and realizes the hanging base station of double-row tapered roller bearing outer ring, with
And the inner ring locked assembly by double-row conical bearing inner ring axial locking on base station, bearing mounting base have base station water
Flat the first test position placed upward and bearing mounting base rotate the second detection that base station level after 180 ° is placed down
Position, dial gauge are fixedly mounted on rocker, and outer ring overcoat is set with double-row tapered roller bearing outer ring, and outer ring overcoat is hanging
In on bearing mounting base, there is outer ring overcoat fixed cover to have loaded on the sleeve on double-row tapered roller bearing outer ring, sleeve
Bottom, the outer surface at the bottom are provided with the measurement datum coordinated for dial gauge gauge outfit, and base station is parallel with measurement datum.
3. biserial conical bearing method for measuring axial clearance according to claim 2, it is characterised in that：The bearing peace
Be further fixed on vertically mounting swing arm on dress bottom plate, it is vertical with bearing mounting base vertically to mount swing arm, pedestal including base and
The installation riser vertical with base, vertically mount swing arm with installation riser it is parallel, vertically mount swing arm and be mounted on installation through pivot
On riser, also include the positioner for keeping bearing mounting base to be located at the first test position and the second test position.
4. biserial conical bearing method for measuring axial clearance according to claim 3, it is characterised in that：The positioner bag
Include and convert rocker position of centre of gravity in the first test position, the upset switching of the second test position to realize for bearing mounting base
Bearing mounting base keeps the first test position, the second test position and the balancing weight in horizontality.
5. biserial conical bearing method for measuring axial clearance according to claim 4, it is characterised in that：Described balancing weight with
Vertically be snug fit at it is described vertically mount in swing arm, balancing weight vertically mounts swing arm and erected with the upset of bearing mounting base
To slip.
6. biserial conical bearing method for measuring axial clearance according to claim 5, it is characterised in that：Vertically mounted described
Swing arm is provided with the locating slot longitudinally opened up towards installation riser one side, is located to be provided with locating slot and is placed on mounting outside pivot
Set, balancing weight slide-and-guide is matched with locating slot, and balancing weight is provided with bar-shaped trough, and balancing weight mounts through bar-shaped trough to be covered in mounting
On.
7. biserial conical bearing method for measuring axial clearance according to claim 2, it is characterised in that：The inner ring locking group
Part includes axial tightening screw rod, U-shaped pressing plate and locking nut, and the opening of U-shaped pressing plate is placed on axial tightening screw rod and position
In face base station position, on axial tightening screw rod, locking nut coordinates locking nut screw thread spinning with the locking of U-shaped pressing plate, U-shaped
Pressing plate forms between locking nut and base station, between U-shaped pressing plate and base station and axially grips double-row conical bearing
The grasping part of inner ring, axial tightening screw rod is with axial direction corresponding with the axial force of axial grip double-row conical bearing inner ring
It is locked at base station center.
8. biserial conical bearing method for measuring axial clearance according to claim 2, it is characterised in that：The outer ring overcoat
Sleeve is provided with along the lock-screw through hole radially opened up, lock-screw through hole screw-internal thread fit and is connected to double row tapered roller
Screw is compressed on sub- bearing outer ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710851269.4A CN107421423B (en) | 2017-09-20 | 2017-09-20 | Biserial conical bearing method for measuring axial clearance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710851269.4A CN107421423B (en) | 2017-09-20 | 2017-09-20 | Biserial conical bearing method for measuring axial clearance |
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| Publication Number | Publication Date |
|---|---|
| CN107421423A true CN107421423A (en) | 2017-12-01 |
| CN107421423B CN107421423B (en) | 2019-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710851269.4A Active CN107421423B (en) | 2017-09-20 | 2017-09-20 | Biserial conical bearing method for measuring axial clearance |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108592760A (en) * | 2018-08-14 | 2018-09-28 | 洛阳市通航电子设备有限公司 | A kind of bearing end-play measuring instrument being conveniently operated |
| CN110579197A (en) * | 2018-06-08 | 2019-12-17 | 襄阳汽车轴承股份有限公司 | Axial clearance measuring instrument for double-row tapered roller bearing |
| CN110986809A (en) * | 2019-12-23 | 2020-04-10 | 中车株洲电机有限公司 | Method and device for measuring radial clearance of motor bearing assembly |
| CN110986810A (en) * | 2019-12-23 | 2020-04-10 | 中车株洲电机有限公司 | Method and device for measuring axial assembly clearance of motor bearing |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110579197A (en) * | 2018-06-08 | 2019-12-17 | 襄阳汽车轴承股份有限公司 | Axial clearance measuring instrument for double-row tapered roller bearing |
| CN108592760A (en) * | 2018-08-14 | 2018-09-28 | 洛阳市通航电子设备有限公司 | A kind of bearing end-play measuring instrument being conveniently operated |
| CN108592760B (en) * | 2018-08-14 | 2023-12-19 | 慈溪市倍尔林实业有限公司 | Bearing radial play measuring instrument convenient to operate |
| CN110986809A (en) * | 2019-12-23 | 2020-04-10 | 中车株洲电机有限公司 | Method and device for measuring radial clearance of motor bearing assembly |
| CN110986810A (en) * | 2019-12-23 | 2020-04-10 | 中车株洲电机有限公司 | Method and device for measuring axial assembly clearance of motor bearing |
| CN110986809B (en) * | 2019-12-23 | 2021-07-02 | 中车株洲电机有限公司 | Method and device for measuring radial clearance of motor bearing assembly |
| CN110986810B (en) * | 2019-12-23 | 2021-09-14 | 中车株洲电机有限公司 | Method and device for measuring axial assembly clearance of motor bearing |
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| CN107421423B (en) | 2019-08-06 |
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Address after: No. 298, Fangjia mountain road, Huzhou, Zhejiang Province Patentee after: Zhejiang Xinzi Precision Machinery Co.,Ltd. Patentee after: HUZHOU SANDUO BEARING CO.,LTD. Address before: No. 298, Fangjia mountain road, Huzhou, Zhejiang Province Patentee before: ZHEJIANG 8+1 PRECISION MACHINERY Co.,Ltd. Patentee before: HUZHOU SANDUO BEARING CO.,LTD. |