CN113483713A - Bearing tool for detecting axial clearance of rolling bearing - Google Patents
Bearing tool for detecting axial clearance of rolling bearing Download PDFInfo
- Publication number
- CN113483713A CN113483713A CN202110740302.2A CN202110740302A CN113483713A CN 113483713 A CN113483713 A CN 113483713A CN 202110740302 A CN202110740302 A CN 202110740302A CN 113483713 A CN113483713 A CN 113483713A
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- bearing
- cover plate
- swing arm
- piece
- displacement indicator
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- 238000005096 rolling process Methods 0.000 title claims abstract description 9
- 238000006073 displacement reaction Methods 0.000 claims abstract description 50
- 238000001514 detection method Methods 0.000 claims abstract description 31
- 230000008093 supporting effect Effects 0.000 claims description 28
- 238000003825 pressing Methods 0.000 claims description 22
- 239000000872 buffer Substances 0.000 claims description 11
- 230000006872 improvement Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 238000009434 installation Methods 0.000 description 4
- 239000000725 suspension Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000012556 adjustment buffer Substances 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
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
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/16—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring distance of clearance between spaced objects
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
本发明公开了一种用于滚动轴承轴向游隙检测的轴承工装，包括检测台和设置在检测台上的位移指示仪；所述检测台上设置有装配轴、可拆卸连接在装配轴上用于固定轴承内圈的固定件、用于挤压轴承外圈的盖板；所述盖板与位移指示仪配合，当下压盖板时，盖板向轴承外圈施力并使轴承外圈相对轴承内圈产生位移，位移指示仪检测该位移量并进行指示，所述位移指示仪与盖板同心配合，所述盖板与位移指示仪可相对转动；所述盖板呈桶型，其开口端的边缘与轴承外圈配合，该盖板的平面端与位移指示仪配合。本发明能够提高检测效率和准确性。
The invention discloses a bearing tool for detecting the axial clearance of rolling bearings, comprising a detection table and a displacement indicator arranged on the detection table; the detection table is provided with an assembly shaft, which is detachably connected to the assembly shaft for The cover plate is used to fix the inner ring of the bearing and the cover plate used to squeeze the outer ring of the bearing; the cover plate cooperates with the displacement indicator. When the cover plate is pressed down, the cover plate exerts force on the outer ring of the bearing and makes the outer ring of the bearing face each other. The inner ring of the bearing is displaced, and the displacement indicator detects and indicates the displacement. The displacement indicator is concentric with the cover plate, and the cover plate and the displacement indicator can rotate relative to each other; the cover plate is in the shape of a barrel, and its opening The edge of the end mates with the bearing outer ring, and the flat end of the cover mates with the displacement indicator. The present invention can improve detection efficiency and accuracy.
Description
Technical Field
The invention relates to a bearing detection device, in particular to a bearing tool for detecting the axial clearance of a rolling bearing.
Background
The bearing is an important part in the modern mechanical equipment, and the main function of the bearing is to support a mechanical rotating body, reduce the friction factor in the movement process of the mechanical rotating body and ensure the rotation precision of the mechanical rotating body.
After the bearing is manufactured, whether the size of the bearing is qualified or not needs to be detected, and the bearing tool for detecting the axial clearance of the rolling bearing needs to be designed in order to improve the detection efficiency and prevent the bearing from being damaged by using the traditional manual detection.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a bearing tool for detecting the axial clearance of a rolling bearing, which can improve the detection efficiency and accuracy.
In order to achieve the purpose, the invention provides the following technical scheme: the bearing tool for detecting the axial clearance of the rolling bearing comprises a detection table and a displacement indicator arranged on the detection table; the detection table is provided with an assembly shaft, a fixing piece detachably connected to the assembly shaft and used for fixing the bearing inner ring, and a cover plate used for extruding the bearing outer ring; the cover plate is matched with the displacement indicator, when the cover plate is pressed down, the cover plate applies force to the bearing outer ring and enables the bearing outer ring to generate displacement relative to the bearing inner ring, the displacement indicator detects and indicates the displacement, the displacement indicator is concentrically matched with the cover plate, and the cover plate and the displacement indicator can rotate relatively; the cover plate is barrel-shaped, the edge of the opening end of the cover plate is matched with the outer ring of the bearing, and the plane end of the cover plate is matched with the displacement indicator.
As a further improvement of the invention, a protrusion coaxial with the axis of the cover plate is arranged on one side of the axis of the cover plate facing the displacement indicator, and a groove matched with the displacement indicator is arranged on the protrusion.
As a further improvement of the invention, the end part of the displacement indicator matched with the cover plate is spherical, and the groove is an arc surface matched with the sphere.
As a further improvement of the invention, the surface of the assembly shaft is provided with threads, the fixing member comprises a lower lock nut, a lower support sheet, an upper support sheet and an upper lock nut which are sequentially arranged from bottom to top, the bearing to be measured is positioned between the lower support sheet and the upper support sheet and is locked and fixed through the upper lock nut and the lower lock nut, the lower support sheet and the upper support sheet are matched with the assembly shaft through a through hole and penetrate through the assembly shaft, and the lower lock nut and the upper lock nut are in threaded connection with the assembly shaft.
As a further improvement of the invention, a convex ring which is matched and inserted with the bearing inner ring is arranged on one side of the upper supporting sheet and/or the lower supporting sheet facing the bearing, and the convex ring is coaxially arranged with the assembling shaft.
As a further improvement of the invention, the detection platform is also provided with a pressurizing assembly for applying force to the cover plate, and the pressurizing assembly comprises a connecting seat arranged on the detection platform, a driving handle hinged on the connecting seat, a swinging arm hinged on the connecting seat and linked with the driving handle, and a pressurizing head arranged on the swinging arm and used for pressurizing the cover plate; the connecting base is hinged with the driving handle through a hinge piece, one end of the hinge piece is hinged with the connecting base, and the other end of the hinge piece is hinged with the driving handle; the pin joint of articulated piece and drive handle is less than the pin joint of drive handle and swing arm, and when drive handle drive swing arm rotated, articulated piece provided the holding power for the drive handle.
As a further improvement of the invention, the pressurizing head comprises a screw rod, a buffer head arranged at one end of the screw rod facing the cover plate, a support piece in threaded connection with the screw rod, a pressing plate arranged on the screw rod, and a nut in threaded connection with the screw rod, wherein the support piece is positioned below the swing arm, the pressing plate is positioned above the swing arm, and the pressing plate and the support piece are matched with the swing arm in size so as to be attached to the upper side and the lower side of the swing arm; the pressure plate is fastened on the upper side of the swing arm through a nut and a support piece.
As a further improvement of the invention, the swing arm is provided with two connecting pieces, a gap for accommodating the screw rod is arranged between the two connecting pieces, the size of the supporting piece and the size of the pressing plate are larger than the gap, the supporting piece and the nut are matched to clamp the pressing plate on the connecting pieces, and the screw rod is fixed on the connecting pieces.
As a further improvement of the invention, the two side edges of the pressure plate are provided with convex edges protruding towards the connecting sheets, and when the pressure plate is attached to the connecting sheets, the convex edges at the two sides are respectively attached to the outer side surfaces of the two connecting sheets.
As a further improvement of the invention, a pressure sensor is arranged in the buffer head, and the pressure sensor is connected with a display device to detect the pressure applied to the cover plate by the buffer head and display the pressure.
The invention has the advantages that the arrangement of the displacement indicator has higher precision than the existing manual detection, and the displacement indicator and the cover plate are concentrically matched and can relatively rotate, so that the normal work of the displacement indicator cannot be influenced when the cover plate rotates, the force application point can be continuously changed by utilizing the mode that the cover plate rotates to drive the outer ring of the bearing, the bearing is uniformly detected, the data is ensured to be accurate, and the parameters of the actual bearing are met.
Drawings
FIG. 1 is a schematic view of the invention after the bearing to be tested is assembled;
FIG. 2 is a schematic diagram of an unassembled state of a bearing to be tested according to the present invention;
FIG. 3 is a schematic view of a pressing assembly according to the present invention;
FIG. 4 is a perspective view of the pressing assembly of the present invention;
fig. 5 is a schematic view of the structure of the convex portion of the present invention.
Reference numerals: 1. a detection table; 2. a displacement indicator; 3. assembling a shaft; 4. a fixing member; 41. a lower lock nut; 42. a lower support sheet; 43. an upper support sheet; 44. locking the nut; 45. a convex ring; 5. a cover plate; 51. a protrusion; 511. a groove; 6. a pressurizing assembly; 61. a connecting seat; 62. a drive handle; 63. swinging arms; 64. a pressurizing head; 641. a screw; 642. a buffer head; 643. a support member; 644. pressing a plate; 65. a hinged sheet; 7. connecting sheets; 8. a convex edge; 91. a pressure sensor; 92. a display device.
Detailed Description
The invention will be further described in detail with reference to the following examples, which are given in the accompanying drawings.
As shown with reference to figures 1-5,
the bearing tool for detecting the axial clearance of the rolling bearing comprises a detection table 1 and a displacement indicator 2 arranged on the detection table 1; the detection table 1 is provided with an assembly shaft 3, a fixing piece 4 which is detachably connected to the assembly shaft 3 and used for fixing a bearing inner ring, and a cover plate 5 used for extruding a bearing outer ring; the cover plate 5 is matched with the displacement indicator 2, when the cover plate 5 is pressed down, the cover plate 5 applies force to the outer ring of the bearing and enables the outer ring of the bearing to generate displacement relative to the inner ring of the bearing, the displacement indicator 2 detects and indicates the displacement, the displacement indicator 2 is concentrically matched with the cover plate 5, and the cover plate 5 and the displacement indicator 2 can rotate relatively; the cover plate 5 is barrel-shaped, the edge of the opening end of the cover plate is matched with the outer ring of the bearing, and the plane end of the cover plate 5 is matched with the displacement indicator 2.
The working principle is that when the play of the bearing needs to be detected, the bearing and the assembly shaft 3 are installed, the fixing piece 4 is used for fixing with the bearing inner ring, then the cover plate 5 with the size corresponding to the bearing outer ring is coaxially buckled on the side surface of the bearing outer ring, the detection part of the displacement indicator 2 is attached to the cover plate 5 to enable the cover plate 5 to enter a preparation state, then the cover plate 5 is pressed downwards, the pressure is transmitted to the bearing outer ring through the cover plate 5, so that the bearing outer ring generates displacement relative to the bearing inner ring, at the moment, the displacement indicator 2 can detect the size of the play, in order to ensure the detection accuracy, the cover plate 5 can be rotated, at the moment, the bearing outer ring can be driven to rotate together, and because the displacement indicator 2 and the cover plate 5 are in concentric fit and can rotate relatively, the normal operation of the displacement indicator 2 cannot be influenced when the cover plate 5 rotates, and utilize the mode that the apron 5 rotation drove the bearing inner race can let the point of application of force constantly change, and then carry out even detection to the bearing, ensure that data is accurate, accord with the parameter of actual bearing.
In order to facilitate the positioning of the displacement indicator 2, a protrusion 51 coaxial with the axis of the cover plate 5 is arranged on one side of the axis of the cover plate 5 facing the displacement indicator 2, a groove 511 matched with the displacement indicator 2 is arranged on the protrusion 51, the end part of the displacement indicator 2 matched with the cover plate 5 is spherical, and the groove 511 is an arc surface matched with the spherical.
The position of arch 51 is more convenient to the instruction of location, through the recess 511 of the spherical cooperation cambered surface of displacement indicator 2, can let both cooperation effects better to recess 511 can possess the effect of location, can let detection effect more accurate.
For the convenience of the dismouting is fixed and adjust, this scheme still provides a 4 examples of mounting convenient to implement, the surface of assembly axle 3 is provided with the screw thread, mounting 4 includes by lower lock nut 41 that supreme arranges in proper order down, bottom suspension fagging 42, go up supporting piece 43, go up lock nut 44, the bearing that awaits measuring is located between bottom suspension fagging 42 and the last supporting piece 43, and lock fixedly through last lock nut 44 and bottom lock nut 41, bottom suspension fagging 42 and last supporting piece 43 wear to establish through-hole and assembly axle 3 cooperation, bottom lock nut 41 and last lock nut 44 and assembly axle 3 threaded connection.
When the bearing needs to be fixed, firstly, the lower locking nut 41 is assembled on the assembly shaft 3, then the lower supporting sheet 42 is sleeved, the supporting sheet and the assembly shaft 3 can be connected in a threaded manner or in a manner of directly penetrating through the lower locking nut, the scheme adopts the penetrating manner for connection, the assembly efficiency can be improved, then the bearing to be detected is sleeved on the assembly shaft 3, when the bearing is sleeved on the assembly shaft 3, the lower supporting sheet 42 can support the bearing, then the upper supporting sheet 43 is sleeved, the upper supporting sheet 43 and the lower supporting sheet 42 are utilized for clamping the bearing, the upper locking nut 44 is screwed in, the bearing inner ring can be installed through the supporting of the lower locking nut 41 and the fastening effect of the upper locking nut 44. After which normal testing can be performed. This assembly is very simple and quick and efficient.
In a specific use, since the diameter of the general assembly shaft 3 is smaller than the inner diameter of the bearing inner ring, the position of the bearing needs to be adjusted separately, and in this case, the upper support pieces 43 having different sizes can be arranged, the size can be based on the bearing inner rings of various specifications, and then the two pieces are paired, and when the position of the bearing is adjusted, the shape of the bearing inner ring can be matched with the shape of the remaining piece, thereby completing the positioning. For example, the edge of the upper supporting piece 43 overlaps the outer diameter of the bearing inner ring, and the position calibration of the bearing is completed at this time, so that the installation of the cover plate 5 is facilitated.
In order to further improve the efficiency of positioning the bearing, a convex ring 45 which is matched and inserted with the bearing inner ring is arranged on one side, facing the bearing, of the upper supporting sheet 43 and/or the lower supporting sheet 42, and the convex ring 45 is coaxially arranged with the assembling shaft 3.
This scheme means, when the bearing of assembly different specifications, need pair the backing sheet of different specifications, but based on the quick assembly disassembly effect of this scheme, can accomplish the effect of quick location under the condition of not increasing how much consuming time. In this scheme, go up all can set up bulge loop 45 on supporting piece 43 and the bottom suspension fagging 42, utilize this bulge loop 45 and bearing inner circle's grafting effect, can realize the quick location to the bearing, and then further improve assembly efficiency, consequently wholly, this scheme can also further improve the efficiency of installation.
In order to improve the pressure control of the cover plate 5, a pressurizing assembly 6 for applying force to the cover plate 5 is further arranged on the detection platform 1, and the pressurizing assembly 6 comprises a connecting seat 61 installed on the detection platform 1, a driving handle 62 hinged on the connecting seat 61, a swing arm 63 hinged on the connecting seat 61 and linked with the driving handle 62, and a pressurizing head 64 arranged on the swing arm 63 and used for pressurizing the cover plate 5; the connecting base 61 is hinged with the driving handle 62 through a hinge sheet 65, one end of the hinge sheet 65 is hinged with the connecting base 61, and the other end is hinged with the driving handle 62; the hinge point of the hinge plate 65 and the driving handle 62 is lower than the hinge point of the driving handle 62 and the swing arm 63, and when the driving handle 62 drives the swing arm 63 to rotate, the hinge plate 65 provides a supporting force for the driving handle 62.
When a user needs to mount the cover plate 5, the driving handle 62 is pulled upwards, the hinge piece 65 rotates upwards around the connecting seat 61, the hinge piece 65 is separated from the support of the driving handle 62, the swing arm 63 is unlocked, the driving handle 62 is pulled towards the direction back to the swing arm 63, the swing arm 63 can be driven to turn upwards, the cover plate 5 is ready to be mounted, after the cover plate 5 is mounted, the driving handle 62 is pushed towards the swing arm 63, the swing arm 63 turns downwards and is attached to the cover plate 5, meanwhile, the hinge piece 65 provides supporting force for the driving handle 62, in the process of pressing the driving handle 62 downwards, the supporting effect of the hinge piece 65 is utilized, the driving handle 62 drives the hinge piece 65 to rotate along with the driving handle 62, the driving handle 62 can assist the driving handle 62 to press the swing arm 63 downwards, and the force for pressing the swing arm 63 downwards is driven by fine adjustment of the driving handle 62 upwards and downwards, thereby completing the force application to the cover plate 5.
In addition, the pressure head 64 includes a screw 641, a buffering head 642 installed at one end of the screw 641 facing the cover plate 5, a supporting member 643 screwed on the screw 641, a pressure plate 644 installed on the screw 641, and a nut screwed on the screw 641, wherein the supporting member 643 is located below the swing arm 63, the pressure plate 644 is located above the swing arm 63, and the pressure plate 644 and the supporting member 643 are both sized to fit the swing arm 63 at the upper and lower sides thereof; a pressure plate 644 is fastened to the upper side of the swing arm 63 by a nut and a support 643.
The buffer head 642 can be detachably connected to the swing arm 63 through the detachable screw 641, the nut and the pressing plate 644, and can be replaced according to bearings to be tested with different specifications. The installation mode is convenient and reliable.
Specifically, the swing arm 63 has two connecting pieces 7, and a gap for accommodating the screw 641 is formed between the two connecting pieces 7, the size of the supporting member 643 and the pressing plate 644 is larger than the gap, and the supporting member 643 and the nut cooperate to clamp the pressing plate 644 on the connecting pieces 7 and fix the screw 641 on the connecting pieces 7.
Through the installation of coordinating in the clearance between two connection pieces 7, can let screw 641 remove in this clearance, and then reach position adjustable effect to satisfy the bearing detection demand of more specifications, combine the convenient reliable characteristics of foretell mounting means, can realize the position of quick adjustment buffer head 642, and then improve holistic detection efficiency, simple in structure, light, the detection personnel of being convenient for operate.
In order to ensure the stability of the fixing, the two sides of the pressing plate 644 have protruding edges 8 protruding toward the connecting pieces 7, and when the pressing plate 644 is attached to the connecting pieces 7, the protruding edges 8 at the two sides are respectively attached to the outer side surfaces of the two connecting pieces 7. The convex edge 8 is used for limiting the connecting sheet 7, so that the connecting sheet 7 can be prevented from being opened outwards, the fixing piece 4 and the pressing plate 644 are separated from the connecting sheet 7, and the buffer head 642 falls off.
As a further optimization, the pressure sensor 91 is disposed in the buffer head 642, and the pressure sensor 91 is connected to a display device 92 for detecting and displaying the pressure applied to the cover 5 by the buffer head 642. The display device 92 may be a knock-out tube or an LCD display.
Through pressure sensor 91's detection, can feed back current pressure and vertically observe for the measurement personnel, be convenient for take notes the corresponding relation of pressure and play, make the result more accurate.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110740302.2A CN113483713A (en) | 2021-06-30 | 2021-06-30 | Bearing tool for detecting axial clearance of rolling bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110740302.2A CN113483713A (en) | 2021-06-30 | 2021-06-30 | Bearing tool for detecting axial clearance of rolling bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113483713A true CN113483713A (en) | 2021-10-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110740302.2A Pending CN113483713A (en) | 2021-06-30 | 2021-06-30 | Bearing tool for detecting axial clearance of rolling bearing |
Country Status (1)
| Country | Link |
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| CN (1) | CN113483713A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001027507A (en) * | 1999-07-14 | 2001-01-30 | Hitachi Zosen Corp | Bearing clearance measurement device |
| JP2004011892A (en) * | 2002-06-11 | 2004-01-15 | Mitsubishi Electric Corp | End play measuring method and measuring device of reduction gear unit |
| CN201066314Y (en) * | 2007-07-27 | 2008-05-28 | 合肥工业大学 | Integrated inspection instrument for friction torque of rolling bearing |
| CN202511744U (en) * | 2012-04-01 | 2012-10-31 | 钱潮轴承有限公司 | Axial clearance detecting device for heavy hub bearing |
| EP2653848A1 (en) * | 2012-04-18 | 2013-10-23 | Aktiebolaget SKF | Device for measuring the bearing clearance of a rolling bearing |
| CN207163381U (en) * | 2017-09-20 | 2018-03-30 | 浙江辛子精工机械股份有限公司 | Convertible bearing axial clearance measuring apparatus |
| CN208125383U (en) * | 2018-05-09 | 2018-11-20 | 人本集团有限公司 | Tapered roller bearing assembles high dynamic detector |
| CN111571181A (en) * | 2020-06-01 | 2020-08-25 | 马鞍山当涂发电有限公司 | Thrust clearance measuring and adjusting device for angular contact ball bearing set |
| CN112284322A (en) * | 2020-10-29 | 2021-01-29 | 江铃汽车股份有限公司 | Hub bearing axial clearance measuring machine and measuring method thereof |
| CN112648907A (en) * | 2020-12-23 | 2021-04-13 | 浙江万向精工有限公司 | Positive internal clearance measuring device based on displacement-torque measurement |
-
2021
- 2021-06-30 CN CN202110740302.2A patent/CN113483713A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001027507A (en) * | 1999-07-14 | 2001-01-30 | Hitachi Zosen Corp | Bearing clearance measurement device |
| JP2004011892A (en) * | 2002-06-11 | 2004-01-15 | Mitsubishi Electric Corp | End play measuring method and measuring device of reduction gear unit |
| CN201066314Y (en) * | 2007-07-27 | 2008-05-28 | 合肥工业大学 | Integrated inspection instrument for friction torque of rolling bearing |
| CN202511744U (en) * | 2012-04-01 | 2012-10-31 | 钱潮轴承有限公司 | Axial clearance detecting device for heavy hub bearing |
| EP2653848A1 (en) * | 2012-04-18 | 2013-10-23 | Aktiebolaget SKF | Device for measuring the bearing clearance of a rolling bearing |
| CN207163381U (en) * | 2017-09-20 | 2018-03-30 | 浙江辛子精工机械股份有限公司 | Convertible bearing axial clearance measuring apparatus |
| CN208125383U (en) * | 2018-05-09 | 2018-11-20 | 人本集团有限公司 | Tapered roller bearing assembles high dynamic detector |
| CN111571181A (en) * | 2020-06-01 | 2020-08-25 | 马鞍山当涂发电有限公司 | Thrust clearance measuring and adjusting device for angular contact ball bearing set |
| CN112284322A (en) * | 2020-10-29 | 2021-01-29 | 江铃汽车股份有限公司 | Hub bearing axial clearance measuring machine and measuring method thereof |
| CN112648907A (en) * | 2020-12-23 | 2021-04-13 | 浙江万向精工有限公司 | Positive internal clearance measuring device based on displacement-torque measurement |
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Application publication date: 20211008 |