CN109724510B - Direct-measuring type eddy current online detection device for axial negative clearance of hub bearing - Google Patents
Direct-measuring type eddy current online detection device for axial negative clearance of hub bearing Download PDFInfo
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- CN109724510B CN109724510B CN201711050763.7A CN201711050763A CN109724510B CN 109724510 B CN109724510 B CN 109724510B CN 201711050763 A CN201711050763 A CN 201711050763A CN 109724510 B CN109724510 B CN 109724510B
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Abstract
The invention discloses a direct-measuring type eddy current online detection device for axial negative clearance of a hub bearing. This eddy current displacement detection device is equipped with installation branch including placing the base on riveting equipment workstation on the base, is equipped with eddy current mounting platform on the installation branch, is equipped with eddy current sensor on the eddy current mounting platform, but eddy current mounting platform top is equipped with switch magnetic force switching subassembly, but this switch magnetic force switching subassembly is placed and is circled in the wheel hub bearing is little. The switchable magnetic force switching assembly utilizes the magnetic principle to change along with the synchronous displacement of the small inner ring of the hub bearing during working, so that the axial negative clearance change of the hub bearing is measured, and the direct-measurement type online detection of the axial negative clearance of the hub bearing is realized.
Description
Technical Field
The invention relates to a clearance detection device of a hub bearing, in particular to a direct-measurement type eddy current online detection device for axial negative clearance of the hub bearing.
Background
The riveting type hub bearing is assembled in a riveting mode in the axial direction to form pre-tightening, and then negative play is generated. The interference magnitude formed by the reasonable negative clearance can provide a reserved amount for abrasion in the using process of the hub bearing, and the bearing capacity of the hub bearing unit is improved, so that the reasonability of the negative clearance is directly related to the working performance and the service life of the hub bearing.
The riveting type hub bearing is assembled by shaft end flanging riveting, belongs to irreversible assembly, and is characterized in that the negative clearance is fixed after the hub bearing is riveted. At present, manufacturers mainly adopt a method of detecting a riveted hub bearing, so that the negative clearance of the hub bearing is difficult to accurately control in the riveting process. Therefore, when the axial clearance is unqualified, the product cannot be repaired, and the stability of the product quality is seriously influenced.
The negative clearance value of the bearing is extremely small, the bearing needs to be accurately controlled within the range of 0-minus 0.04mm, and the bearing is greatly influenced by the space constraint of a machine tool and the vibration of the machine tool. Therefore, the hub bearing online measuring device has high performance requirement and large design difficulty.
Disclosure of Invention
The invention aims to provide a direct-measuring type eddy current online detection device for axial negative clearance of a hub bearing.
In order to achieve the purpose, the invention adopts the following technical scheme:
a direct-measuring eddy current online detection device for axial negative clearance of a hub bearing comprises an eddy current displacement detection device, a transition sleeve and a pressure sensor, wherein the eddy current displacement detection device comprises a base placed on a riveting equipment workbench, an installation supporting rod is arranged on the base, an eddy current installation platform is arranged on the installation supporting rod, the eddy current installation platform is provided with the eddy current sensor, a switchable magnetic force switching assembly is arranged above the eddy current installation platform and placed on a small inner ring of the hub bearing, the eddy current sensor is locked on the eddy current installation platform through a bolt, the switchable magnetic force switching assembly comprises a bottom box made of non-magnetic materials and a laminating bottom made of magnetic materials and used for laminating the small inner ring of the hub bearing, and a rotating ring made of non-magnetic materials is arranged on the bottom box, the rotary ring and the bottom box can mutually rotate circumferentially, the laminating bottom is arranged on the bottom box and is positioned below the rotary ring, the pressing plate is arranged on the rotary ring, the target plate is arranged on the pressing plate, the non-magnetic conduction areas are uniformly distributed on the circumference of the bottom box, and the magnets are uniformly distributed on the circumference of the rotary ring.
The mounting support rod is provided with a sleeve, and the sleeve is provided with a cotter pin for mounting the electric eddy current mounting platform.
The attaching bottom and the target plate are made of steel materials, and the bottom box, the rotating ring and the pressing plate are made of aluminum materials.
By adopting the scheme, the method has the following advantages:
1. the device can realize direct-measuring type online detection of the axial negative clearance of the hub bearing;
2. the device adopts an eddy current sensor, and is characterized in that: the data is automatically acquired, the measurement precision is high, the response speed is high, the measurement process is convenient and fast, and the reliability is high;
3. the switchable magnetic force switching assembly is utilized to change the situation that the eddy current sensor is difficult to use originally into the situation that the switching assembly is convenient to use;
4. the device utilizes magnetism principle closely to laminate switch magnetic force switching subassembly on the little inner circle of wheel hub bearing, realizes switch magnetic force switching subassembly and follows the little inner circle synchronous displacement change of wheel hub bearing at the during operation.
Drawings
FIG. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a rear view of the present invention;
FIG. 3 is a schematic right-view of the present invention;
FIG. 4 is a schematic structural view of a hub bearing;
fig. 5 is a schematic structural view of the switchable magnetic adapter of the present invention.
Fig. 6 is a schematic top view of the switchable magnetic adapter of the present invention.
Fig. 7 is a schematic cross-sectional view taken along line a-a of fig. 4.
In the figure: 1-workstation, 2-base, 3-sleeve, 4-split pin, 5-installation branch, 6-eddy current sensor, 7-eddy current installation platform, 8-transition cover, 9-pressure sensor, 10-end box, 11-laminating bottom, 12-rotation ring, 13-magnet, 14-clamp plate, 15-target plate, 16-non-magnetic conduction district, 17-switchable magnetic force switching component, 18-hub bearing, 19-small inner circle of hub bearing, 20-small inner axle, 21-rivet, 22-bolt.
Detailed Description
In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the accompanying drawings.
As shown in the attached drawings 1-7, a direct-measuring type eddy current online detection device for axial negative clearance of a hub bearing comprises an eddy current displacement detection device, a transition sleeve 8 and a pressure sensor 9, wherein the eddy current displacement detection device comprises a base 2 installed on a workbench 1 of riveting equipment, four installation support rods 5 are arranged on the base 2, an eddy current installation platform 7 is installed on the installation support rods 5, an eddy current sensor 6 is installed on the eddy current installation platform 7, a switchable magnetic force switching assembly 17 is arranged above the eddy current installation platform 7, the switchable magnetic force switching assembly 17 is placed on a small inner ring 19 of the hub bearing, the eddy current sensor 6 is locked on the eddy current installation platform 7 through bolts 22, a plurality of eddy current sensors 6 are installed on the eddy current installation platform 7, three eddy current sensors 6 are usually arranged, three-point measurement is adopted, and a plane is determined by three points, so that the axial negative clearance of the hub bearing 18 can be accurately measured.
But switch magnetic force switching subassembly 17 includes the end box 10 made by non-magnetic material and is used for laminating little inner circle 19 of wheel hub bearing and the laminating bottom 11 made by magnetic conductive material, and the activity is equipped with the rotation ring 12 made by non-magnetic material on the end box 10, and laminating bottom 11 is installed on end box 10, and laminating bottom 11 lies in rotating ring 12, and clamp plate 14 is installed on rotating ring 12, and target plate 15 is installed on clamp plate 14, circumference equipartition non-magnetic conduction district 16 on end box 10, the circumference equipartition a plurality of magnet 13 on rotating ring 12, and laminating bottom 11 and target plate 15 adopt the steel material to make, and end box 10, rotation ring 12 and clamp plate 14 adopt aluminium material to make, effectively avoid the influence of magnetism to electric eddy current sensor 6, rotate ring 12 and rotate magnet 13 and laminating bottom 11 contact behind certain angle, realize the magnetization to laminating bottom 11 for but switch magnetic force switching subassembly 17 laminates on little inner circle 19 of wheel hub bearing, when will take off switch magnetic force switching subassembly 17, rotation ring 12 rotates, make magnet 13 rotate to the non-magnetic conduction district 16 on the end box 10, make laminating bottom 11 be in the demagnetization state, can be convenient take off, in addition, the general design of rotation ring 12 inner circle department is trapezoidal, prevent to obstruct the normal work of die 21, in addition, because rotation ring 12 and laminating bottom 11 are removable for different sizes, can adapt to the little inner circle 19 of the hub bearing of different diameter sizes, but consequently switch magnetic force switching subassembly 17 can be used to the direct-measuring formula electric eddy current on-line measuring of the axial negative clearance of the hub bearing 18 of different sizes, model.
The utility model discloses a riveting device, including installation branch 5, split pin 4, rivet, and split pin 4, installation branch 5 is equipped with sleeve 3, be equipped with on sleeve 3 and be used for the dress to connect electric eddy current mounting platform 7, through setting up sleeve 3, make the installation inseparabler, utilize split pin 4 to increase the stress point, reduce the not hard up that the dress in-process that rivets produced the vibration and lead to, in addition, through split pin 4, can be convenient replace the change, can be more convenient when changing the product model, because split pin 4 and sleeve 3 are processed easily, and can guarantee the precision, reduce the error that the installation clearance produced, and it is firm to make whole device installation.
Little inner circle 19 of hub bearing and the laminating of laminating bottom 11, laminating bottom 11 has magnetism this moment, utilize magnetism, but guarantee switch magnetic force switching subassembly 17 and the little inner circle 19's of hub bearing inseparable laminating, when riveting equipment pushed down hub bearing 18, but switch magnetic force switching subassembly 17 takes place synchronous displacement change along the little inner circle 19 of hub bearing, but switch magnetic force switching subassembly 17 turns into the displacement of switch magnetic force switching subassembly 17 with the little inner circle 19's of hub bearing displacement, but measure the displacement size of switch magnetic force switching subassembly 17 through eddy current sensor 7, thereby obtain the axial negative clearance value of this hub bearing 18.
The specific working principle of the invention is as follows: place on base 2 after installing on transition cover 8 hub bearing 18 that waits that initial play is zero to set up pressure sensor 9 between base 2 and transition cover 8, this pressure sensor 9 up end and 8 bottom surface contacts of transition cover, lower terminal surface and base 2 contact, place switch magnetic force switching subassembly 17 on hub bearing 18, closed magnetic circuit, but the inseparable laminating of switch magnetic force switching subassembly 17 and hub bearing 18's little inner circle 19.
Starting riveting equipment, wherein a rivet head 21 of the riveting equipment applies axial pressure to a small inner shaft 20 flange of a workpiece to be riveted, when a pressure sensor 9 detects that the axial pressure is equal to a preset pressure value, reading a measured value of the current vortex sensor 6 to a target plate 15 at the moment and marking the measured value as an A value, and the position of a hub bearing 18 is a reference position with initial zero clearance; at the initial zero clearance reference position, the hub bearing 18 to be riveted, the transition sleeve 8 and the pressure sensor 9 are compacted mutually, the clearance between the hub bearing 18 to be riveted, the transition sleeve 8 and the pressure sensor 9 is eliminated, axial pressure is continuously applied to the flange of the small inner shaft 20, the hub bearing 18 forms a negative clearance, the electric eddy current sensor 6 measures the negative clearance in real time, when the measured negative clearance reaches a reasonable range, the riveting equipment is reset, the rivet head 21 gradually leaves the hub bearing 18, the axial pressure borne by the hub bearing 18 is gradually reduced and generates elastic recovery, the target plate 15 moves upwards, the negative clearance value measured by the electric eddy current sensor 6 in real time is reduced, when the pressure sensor 9 detects that the pressure value is equal to the preset pressure value again, the measured value of the electric eddy current sensor 6 at the moment is read and marked as a value B, and the difference value between the value B and the value A is calculated.
It should be noted that the above description is not intended to limit the present invention, and any obvious alternative is within the scope of the present invention without departing from the inventive concept thereof.
Claims (3)
1. A direct-measuring type eddy current online detection device for axial negative clearance of a hub bearing comprises an eddy current displacement detection device, a transition sleeve and a pressure sensor, wherein the eddy current displacement detection device comprises a base arranged on a riveting equipment workbench, and the direct-measuring type eddy current online detection device is characterized in that an installation supporting rod is arranged on the base, an eddy current installation platform is arranged on the installation supporting rod, an eddy current sensor is arranged on the eddy current installation platform, a switchable magnetic force switching assembly is arranged above the eddy current installation platform and is arranged on a small inner ring of the hub bearing, the eddy current sensor is locked on the eddy current installation platform through bolts, the switchable magnetic force switching assembly comprises a bottom box made of non-magnetic materials and a laminating bottom which is used for laminating and installing the small inner ring of the hub bearing and is made of magnetic materials, and a rotating ring made of non-magnetic materials is arranged on the bottom box, the rotary ring and the bottom box can mutually rotate circumferentially, the laminating bottom is arranged on the bottom box and is positioned below the rotary ring, the pressing plate is arranged on the rotary ring, the target plate is arranged on the pressing plate, the non-magnetic conduction areas are uniformly distributed on the circumference of the bottom box, and the magnets are uniformly distributed on the circumference of the rotary ring.
2. The hub bearing axial negative clearance direct-measuring type eddy current online detection device according to claim 1, wherein a sleeve is mounted on the mounting support rod, and a cotter pin for mounting the eddy current mounting platform is arranged on the sleeve.
3. The direct-measuring eddy current online detection device for the axial negative clearance of the hub bearing as claimed in claim 2, wherein the joint bottom and the target plate are made of steel material, and the bottom box, the rotating ring and the pressure plate are made of aluminum material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711050763.7A CN109724510B (en) | 2017-10-31 | 2017-10-31 | Direct-measuring type eddy current online detection device for axial negative clearance of hub bearing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711050763.7A CN109724510B (en) | 2017-10-31 | 2017-10-31 | Direct-measuring type eddy current online detection device for axial negative clearance of hub bearing |
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| CN109724510A CN109724510A (en) | 2019-05-07 |
| CN109724510B true CN109724510B (en) | 2020-09-29 |
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| CN201711050763.7A Active CN109724510B (en) | 2017-10-31 | 2017-10-31 | Direct-measuring type eddy current online detection device for axial negative clearance of hub bearing |
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Families Citing this family (1)
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| CN110657772B (en) * | 2019-11-12 | 2020-09-01 | 济南易恒技术有限公司 | Third-generation direct detection method and device for negative clearance of hub bearing unit |
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| US6184993B1 (en) * | 1999-02-09 | 2001-02-06 | Phase Metrics, Inc. | Apparatus for measuring a small gap using a Savart plate |
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2017
- 2017-10-31 CN CN201711050763.7A patent/CN109724510B/en active Active
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| US6184993B1 (en) * | 1999-02-09 | 2001-02-06 | Phase Metrics, Inc. | Apparatus for measuring a small gap using a Savart plate |
| CN201011494Y (en) * | 2006-12-31 | 2008-01-23 | 瓦房店轴承集团有限责任公司 | Full-automatic windage detecting machine |
| CN101825427A (en) * | 2009-03-02 | 2010-09-08 | 湖北新火炬科技股份有限公司 | Drive hub bearing unit assembly clearance measurement method |
| CN202471042U (en) * | 2012-03-26 | 2012-10-03 | 昆山福维斯精密机械有限公司 | Automobile hub bearing axial play measurement instrument |
| CN105937875A (en) * | 2016-06-30 | 2016-09-14 | 西安交通大学 | Dynamic clearance measuring instrument and measuring method thereof |
| CN106871846A (en) * | 2016-12-30 | 2017-06-20 | 韶关学院 | The online direct measuring method of negative clearance when a kind of hub-bearing unit riveted is assembled |
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