CN202274957U - Auxiliary device capable of axially preloading inner rings and testing friction torque of paired minitype ball bearings - Google Patents
Auxiliary device capable of axially preloading inner rings and testing friction torque of paired minitype ball bearings Download PDFInfo
- Publication number
- CN202274957U CN202274957U CN201120291985XU CN201120291985U CN202274957U CN 202274957 U CN202274957 U CN 202274957U CN 201120291985X U CN201120291985X U CN 201120291985XU CN 201120291985 U CN201120291985 U CN 201120291985U CN 202274957 U CN202274957 U CN 202274957U
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- ball bearing
- rolling ball
- micro rolling
- diameter
- minitype
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Abstract
The utility model relates to an auxiliary device capable of axially preloading inner rings and testing the friction torque of paired minitype ball bearings. The paired minitype ball bearings refer to a first minitype ball bearing (3) and a second minitype ball bearing (4) which are same in structure and size. A raster rotor (5) and a test head central shaft (7) in a minitype ball bearing friction torque tester are also related. The auxiliary device is composed of a preloading bolt (1), a loading ring (2), and a supporting shaft (3). The supporting shaft is arranged on an output head end of the test head central shaft. The inside of the loading ring is provided with the first minitype ball bearing and the second minitype ball bearing, and the first minitype ball bearing and the second minitype ball bearing are axially preloaded and fixed via the preloading bolt and the supporting shaft. Based on different rotation speeds or different rotation directions of the test head central shaft, the starting friction torque or the dynamic friction torque of the paired minitype ball bearings can be read from the minitype ball bearing friction torque tester. The auxiliary device has the characteristics of simple structure and accurate axial preloading force. The auxiliary device can be used with the minitype ball bearing friction torque tester, so the application scope of the auxiliary device is enlarged.
Description
Technical field
The utility model belongs to bearing proving installation technical field, specially refers to the servicing unit of a kind of axial pretightening inner ring and test pairing micro rolling ball bearing moment of friction.
Background technology
Some mechanism in fields such as space flight, aviation, navigation, low speed or swing during work under stronger vibration, impact condition, require the moment of friction of used micro rolling ball bearing low, bearing accuracy is high and axially and radial rigidity also high.
Guarantee the high and good effective means of radial rigidity of bearing accuracy; Be that the two cover micro rolling ball bearing pairings that physical dimension equates are used; This just need test the moment of friction of pairing micro rolling ball bearing; But existing micro rolling ball bearing friction torque testing instrument can only be used for testing single cover micro rolling ball bearing, like the measurement range of YZC type micro rolling ball bearing moment of friction measuring instrument is: bearing bore diameter 0.5～20mm, bearing outside diameter 5～33mm, bearing height 2～10mm.
Friction torque test to the pairing micro rolling ball bearing; Particularly then can not directly test, need could test by the micro rolling ball bearing friction torque testing instrument through a cover servicing unit through the micro rolling ball bearing friction torque testing instrument when two inner ring relative fixed and the pairing micro rolling ball bearing that is applied with axial pre tightening force.
Summary of the invention
Do not match problem for solving the micro rolling ball bearing friction torque testing instrument; The utility model has designed the servicing unit of a kind of axial pretightening inner ring and test pairing micro rolling ball bearing moment of friction; This servicing unit can assemble the micro rolling ball bearing that two nested structure sizes equate simultaneously; And to the pairing micro rolling ball bearing two inner rings apply axial pre tightening force, through the micro rolling ball bearing friction torque testing instrument test the pairing micro rolling ball bearing starting friction moment or dynamic friction torque.
For realizing the foregoing invention purpose, the utility model adopts following technical scheme:
The servicing unit of a kind of axial pretightening inner ring and test pairing micro rolling ball bearing moment of friction, the pairing micro rolling ball bearing is meant first micro rolling ball bearing and second micro rolling ball bearing that physical dimension equates; This servicing unit relates to grating rotor and the measuring head central shaft in the micro rolling ball bearing friction torque testing instrument; This servicing unit is made up of pretension bolt, loaded ring and back shaft; Wherein back shaft is assemblied in measuring head central shaft output head end; Configuration first micro rolling ball bearing and second micro rolling ball bearing in loaded ring, the inner ring of first micro rolling ball bearing and second micro rolling ball bearing comes axial pretightening and fixing through pretension bolt and back shaft.
Above-mentioned loaded ring has two stepped endoporus and profile is cone; The maximum inner diameter hole of said two stepped endoporus is in the large end face of said cone; The minimum diameter hole of said two stepped endoporus is in the small end face of said cone; The aperture in said maximum inner diameter hole equals the external diameter of first micro rolling ball bearing or the second micro rolling ball bearing outer ring; The width that the axial length in said maximum inner diameter hole equals first micro rolling ball bearing adds the width of second micro rolling ball bearing; The external taper that the aperture in said minimum diameter hole≤first micro rolling ball bearing or the internal diameter of the second micro rolling ball bearing outer ring, loaded ring profile are cone matches with the internal taper of grating rotor in the micro rolling ball bearing friction torque testing instrument.
Above-mentioned pretension bolt has internal thread hole and profile is T type structure; Big end top at pretension bolt is provided with two symmetrical blind holes; The pretension bolt small end is to have large cylinder and the small cylinder that two external diameters do not wait; The external diameter of said large cylinder is less than the aperture in the said minimum diameter of loaded ring hole; The external diameter of said small cylinder≤first micro rolling ball bearing or the external diameter of second ball bearing inner race, the said internal thread hole of pretension bolt is a through hole, the nominal bore diameter of said internal thread hole≤first micro rolling ball bearing or the internal diameter of the second micro rolling ball bearing inner ring.
Above-mentioned back shaft is convex and is divided into epimere and hypomere; The said epimere of back shaft is made up of supporting section, cooperation section and thread segment; The external diameter of said supporting section equals the external diameter of first micro rolling ball bearing or the second micro rolling ball bearing inner ring; The external diameter of said cooperation section equals the internal diameter of first micro rolling ball bearing or the second micro rolling ball bearing inner ring; Said axial length≤the width of first micro rolling ball bearing of section that cooperates adds the width of second micro rolling ball bearing; The nominal outside diameter of said thread segment equals the nominal bore diameter of the said internal thread hole of pretension bolt, and the bottom surface car of the said hypomere of back shaft is shaped on the countersunk head endoporus, and the internal diameter of said countersunk head endoporus equals the external diameter of measuring head central shaft delivery in the micro rolling ball bearing friction torque testing instrument.
Owing to adopt technical scheme as stated, the utility model produces following good effect:
1,, solved the difficult problem that existing micro rolling ball bearing friction torque testing instrument can not be tested pairing micro rolling ball bearing moment of friction through the servicing unit of the utility model.
2, the servicing unit of the utility model can apply axial load to the pairing micro rolling ball bearing, tests out the starting friction moment or the dynamic friction torque of pairing micro rolling ball bearing then through the micro rolling ball bearing friction torque testing instrument.
3, the servicing unit of the utility model has simple in structurely, applies the accurate characteristics of axial pre tightening force.
4, the servicing unit of the utility model has the effect of practical application, with the supporting use of micro rolling ball bearing friction torque testing instrument, makes its range of application obtain bigger expansion.
Description of drawings
Fig. 1 is the assembling synoptic diagram of servicing unit and micro rolling ball bearing friction torque testing instrument.
Among Fig. 1: 1-pretension bolt; 2-loaded ring; 3-the first micro rolling ball bearing; 4-the second micro rolling ball bearing; 5-grating rotor; 6-back shaft; 7-measuring head central shaft.
Embodiment
The utility model is the servicing unit of a kind of axial pretightening inner ring and test pairing micro rolling ball bearing moment of friction, and the pairing micro rolling ball bearing is meant first micro rolling ball bearing 3 and second micro rolling ball bearing 4 that physical dimension equates.
The servicing unit of the utility model relates to the grating rotor 5 and measuring head central shaft 7 in the micro rolling ball bearing friction torque testing instrument.
In conjunction with Fig. 1; The servicing unit of the utility model is made up of pretension bolt 1, loaded ring 2 and back shaft 6; Wherein back shaft 6 is assemblied in measuring head central shaft 7 output head ends; The inner ring of configuration first micro rolling ball bearing 3 and second micro rolling ball bearing, 4, the first micro rolling ball bearings 3 and second micro rolling ball bearing 4 comes axial pretightening and fixing through pretension bolt 1 and back shaft 6 in loaded ring 2.
Model such as first micro rolling ball bearing 3 and second micro rolling ball bearing 4 is 628/5, and its physical dimension is Ф 5mm * Ф 11mm * 4mm.
Above-mentioned loaded ring 2 has two stepped endoporus and profile is cone; The maximum inner diameter hole of said two stepped endoporus is in the large end face of said cone; The minimum diameter hole of said two stepped endoporus is in the small end face of said cone; The aperture in said maximum inner diameter hole equals the external diameter of first micro rolling ball bearing 3 or second micro rolling ball bearing, 4 outer rings; The width that the axial length in said maximum inner diameter hole equals first micro rolling ball bearing 3 adds the width of second micro rolling ball bearing 4; The external taper that the internal diameter of the aperture in said minimum diameter hole≤first micro rolling ball bearing 3 or second micro rolling ball bearing, 4 outer rings, loaded ring 2 profiles are cone matches with the internal taper of grating rotor 5 in the micro rolling ball bearing friction torque testing instrument.Such as model is that 628/5 the employed loaded ring basic structure of micro rolling ball bearing size is: the axial overall height of loaded ring is 9mm; The aperture in the said maximum inner diameter of loaded ring hole is Ф 11mm; The axial length in the said maximum inner diameter of loaded ring hole equals 8.0mm; The aperture in the said minimum diameter of the loaded ring hole≤dark 1.0mm of Ф 9.6mm, the employed material of loaded ring is LY12.
Above-mentioned pretension bolt 1 has internal thread hole and profile is T type structure; Being provided with two symmetrical blind holes on the big end top of pretension bolt 1 is to be used for the mounting torque spanner; The pretension bolt small end is to have large cylinder and the small cylinder that two external diameters do not wait; The external diameter of said large cylinder is less than the aperture Ф 9.6mm in the said minimum diameter of loaded ring hole; The external diameter of the external diameter of said small cylinder≤first micro rolling ball bearing 3 or second micro rolling ball bearing, 4 inner rings, the said internal thread hole of pretension bolt is a through hole, the nominal bore diameter of said internal thread hole≤first micro rolling ball bearing 3 or the internal diameter Ф 5mm of second micro rolling ball bearing, 4 inner rings.
Above-mentioned back shaft 6 is convex and is divided into epimere and hypomere; Back shaft 6 said epimeres are made up of supporting section, cooperation section and thread segment; The external diameter of said supporting section equals the external diameter of first micro rolling ball bearing 3 or second micro rolling ball bearing, 4 inner rings; The external diameter of said cooperation section equals the internal diameter Ф 5mm of first micro rolling ball bearing 3 or second micro rolling ball bearing, 4 inner rings; Axial length≤the width of first micro rolling ball bearing 3 of said cooperation section adds width≤8 mm of second micro rolling ball bearing 4; The nominal outside diameter of said thread segment equals the nominal bore diameter M5 of the said internal thread hole of pretension bolt, and the bottom surface car of the said hypomere of back shaft is shaped on the countersunk head endoporus, and the internal diameter of said countersunk head endoporus equals the external diameter of measuring head central shaft 7 deliveries in the micro rolling ball bearing friction torque testing instrument.
The torque spanner that in pretension bolt 1 the above two symmetrical blind hole, is inserted applies axial load to the inner ring of first micro rolling ball bearing 3 and second micro rolling ball bearing 4; The size of axial load is controlled in the theoretical value of micro rolling ball bearing, to realize axially fastening the inner ring of two pairing micro rolling ball bearings; The bolster 6 that will be equipped with then is installed on measuring head central shaft 7 output shaft heads through said countersunk head endoporus; At last grating rotor 5 is buckled on loaded ring 2 cones; Dispose photoelectric sensor between grating rotor 5 and the measuring head central shaft 7; According to measuring head central shaft different rotating speeds or different rotary direction, can read first micro rolling ball bearing 3 of pairing and the starting friction moment or the dynamic friction torque of second micro rolling ball bearing 4 from the micro rolling ball bearing friction torque testing instrument.
Need to prove: associated loaded ring 2, pretension bolt 1 and back shaft 6 also should corresponding changes when the model change of first micro rolling ball bearing 3 and the second tested micro rolling ball bearing 4; But the fit structure of the external taper of loaded ring 2 cones and the internal taper of grating rotor 5 is constant, and the said countersunk head endoporus of back shaft 6 hypomeres is constant with the position structure that measuring head central shaft 7 output shaft heads are connected.
Claims (1)
1. the servicing unit of axial pretightening inner ring and test pairing micro rolling ball bearing moment of friction, the pairing micro rolling ball bearing is meant first micro rolling ball bearing (3) and second micro rolling ball bearing (4) that physical dimension equates; This servicing unit relates to grating rotor (5) and the measuring head central shaft (7) in the micro rolling ball bearing friction torque testing instrument; It is characterized in that: this servicing unit is made up of pretension bolt (1), loaded ring (2) and back shaft (6); Wherein back shaft (6) is assemblied in measuring head central shaft (7) output head end; Configuration first micro rolling ball bearing (3) and second micro rolling ball bearing (4) in loaded ring (2), the inner ring of first micro rolling ball bearing (3) and second micro rolling ball bearing (4) comes axial pretightening and fixing through pretension bolt (1) and back shaft (6).
2, the servicing unit of axial pretightening inner ring and test pairing micro rolling ball bearing moment of friction according to claim 1; It is characterized in that: loaded ring (2) has two stepped endoporus and profile is cone; The maximum inner diameter hole of said two stepped endoporus is in the large end face of said cone; The minimum diameter hole of said two stepped endoporus is in the small end face of said cone; The aperture in said maximum inner diameter hole equals the external diameter of first micro rolling ball bearing (3) or second micro rolling ball bearing (4) outer ring; The width that the axial length in said maximum inner diameter hole equals first micro rolling ball bearing (3) adds the width of second micro rolling ball bearing (4); The external taper that the internal diameter of the aperture in said minimum diameter hole≤first micro rolling ball bearing (3) or second micro rolling ball bearing (4) outer ring, loaded ring (2) profile are cone matches with the internal taper of grating rotor (5) in the micro rolling ball bearing friction torque testing instrument.
3, the servicing unit of axial pretightening inner ring and test pairing micro rolling ball bearing moment of friction according to claim 1 or claim 2; It is characterized in that: pretension bolt (1) has internal thread hole and profile is T type structure; Big end top at pretension bolt (1) is provided with two symmetrical blind holes; Pretension bolt (1) small end is to have large cylinder and the small cylinder that two external diameters do not wait; The external diameter of said large cylinder is less than the aperture in the said minimum diameter of loaded ring (2) hole; The external diameter of the external diameter of said small cylinder≤first micro rolling ball bearing (3) or second ball bearing (4) inner ring, the said internal thread hole of pretension bolt (1) is a through hole, the nominal bore diameter of said internal thread hole≤first micro rolling ball bearing (3) or the internal diameter of second micro rolling ball bearing (4) inner ring.
4,
Like claim 1 or 2The servicing unit of said axial pretightening inner ring and test pairing micro rolling ball bearing moment of friction; It is characterized in that: back shaft (6) is convex and is divided into epimere and hypomere; The said epimere of back shaft (6) is made up of supporting section, cooperation section and thread segment; The external diameter of said supporting section equals the external diameter of first micro rolling ball bearing (3) or second micro rolling ball bearing (4) inner ring; The external diameter of said cooperation section equals the internal diameter of first micro rolling ball bearing (3) or second micro rolling ball bearing (4) inner ring; The said width of axial length≤first micro rolling ball bearing (3) of section that cooperates adds the width of second micro rolling ball bearing (4); The nominal outside diameter of said thread segment equals the nominal bore diameter of the said internal thread hole of pretension bolt (1), and the bottom surface car of the said hypomere of back shaft (6) is shaped on the countersunk head endoporus, and the internal diameter of said countersunk head endoporus equals the external diameter of measuring head central shaft (7) delivery in the micro rolling ball bearing friction torque testing instrument.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120291985XU CN202274957U (en) | 2011-08-12 | 2011-08-12 | Auxiliary device capable of axially preloading inner rings and testing friction torque of paired minitype ball bearings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120291985XU CN202274957U (en) | 2011-08-12 | 2011-08-12 | Auxiliary device capable of axially preloading inner rings and testing friction torque of paired minitype ball bearings |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202274957U true CN202274957U (en) | 2012-06-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120291985XU Expired - Fee Related CN202274957U (en) | 2011-08-12 | 2011-08-12 | Auxiliary device capable of axially preloading inner rings and testing friction torque of paired minitype ball bearings |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202274957U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103162884A (en) * | 2013-02-04 | 2013-06-19 | 西北工业大学 | Device capable of measuring static torque |
| CN110887589A (en) * | 2019-12-04 | 2020-03-17 | 兰州华汇仪器科技有限公司 | Method for measuring friction torque of bearing during rotation |
-
2011
- 2011-08-12 CN CN201120291985XU patent/CN202274957U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103162884A (en) * | 2013-02-04 | 2013-06-19 | 西北工业大学 | Device capable of measuring static torque |
| CN110887589A (en) * | 2019-12-04 | 2020-03-17 | 兰州华汇仪器科技有限公司 | Method for measuring friction torque of bearing during rotation |
| CN110887589B (en) * | 2019-12-04 | 2021-08-17 | 兰州华汇仪器科技有限公司 | Method for measuring friction torque of bearing during rotation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120613 Termination date: 20170812 |