CN104266964A - Method for testing skip change of worm wheel and worm fit friction coefficient of automobile steering system - Google Patents
Method for testing skip change of worm wheel and worm fit friction coefficient of automobile steering system Download PDFInfo
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- CN104266964A CN104266964A CN201410566374.XA CN201410566374A CN104266964A CN 104266964 A CN104266964 A CN 104266964A CN 201410566374 A CN201410566374 A CN 201410566374A CN 104266964 A CN104266964 A CN 104266964A
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- 238000012360 testing method Methods 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 title abstract description 7
- 238000010998 test method Methods 0.000 claims abstract description 18
- 238000013461 design Methods 0.000 claims abstract description 15
- 238000009434 installation Methods 0.000 claims description 27
- 238000011835 investigation Methods 0.000 claims description 3
- 238000013102 re-test Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims 1
- 238000003825 pressing Methods 0.000 abstract 1
- 238000010009 beating Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000035772 mutation Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
- G01N19/02—Measuring coefficient of friction between materials
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- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Gear Transmission (AREA)
- Power Steering Mechanism (AREA)
- Gears, Cams (AREA)
Abstract
The invention discloses a method for testing the skip change of a worm wheel and worm fit friction coefficient of an automobile steering system. The method comprises the steps of (1) arranging a worm wheel assembly on a worm wheel fixing device in a rotatable manner, arranging a worm assembly on a worm fixing device in a rotatable manner, and meshing the worm assembly with the worm wheel assembly; (2) applying pressure F on the worm assembly to rotate the worm assembly; (3) measuring a rotating torque T of the worm assembly; (4) calculating the worm wheel and worm fit friction coefficient; (5) drawing a skip change curve graph of the worm wheel and worm fit friction coefficient. A conventional friction coefficient test method is applied to testing the skip change of a friction pair of worm wheel and worm fit of a speed reducing mechanism of a tubular column type electric steering system; the method is simple and practical and is low in cost; during design of an early speed reducing structure, problems can be found by the providing of the test method, so that mechanical noise generated by a worm wheel and a worm can be avoided in advance; therefore, the cost and the period for changing the design in the later stage can be reduced.
Description
Technical field
The invention belongs to automobile technical field, specifically, the pipe column type electric steering reducing gear worm and gear friction fit coefficient that the present invention relates on a kind of automobile is beated change method of testing.
Background technology
Along with the development of auto industry, traditional hydraulic steering system application is fewer and feweri, in order to improve handling and the car load comfortableness of automobile, and reduce the oil consumption of car load, increasing automobile adopts electric power steering, and current a greater part of electric power steering adopts pipe column type electric steering.
The reducing gear worm and gear cooperation of pipe column type electric steering is easy to produce mechanicalness noise, along with client requires more and more harsher for car comfort, if car load steering parts control bad to this mechanicalness noise, client can be caused to complain, the car load Brand Buying that serious situation even affects client is selected, cause car load sales volume to glide, affect enterprise profit.
The reducing gear worm and gear cooperation of pipe column type electric steering is easy to produce mechanicalness noise, the mechanism producing noise mainly contains following several situation: 1, the processing of the parts of worm gear, worm screw own does not meet design requirement, and tolerance clearance does not meet design requirement; 2, worm gear, worm screw coordinate Face contact ratio poor; 3, worm gear, worm screw matching surface easily wear and tear, and surface is jagged; The PERFORMANCE OF GREASES of 4, smearing between worm gear, worm screw cooperation is bad, does not play due lubrication.The detection of above four mechanism can be found by the change of beating of reducing gear worm and gear friction fit coefficient, and in-problem situation friction system is beated all can be larger, even there will be mutation situation.
Summary of the invention
The invention provides a kind of automobile steering system worm and gear friction fit coefficient to beat change method of testing, object evades worm and gear in advance to produce mechanicalness noise.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is: automobile steering system worm and gear friction fit coefficient is beated change method of testing, and it comprises step:
(1) be arranged in worm gear stationary installation by rotatable for worm gear assembly, be arranged on rotatable for worm screw assembly in worm screw stationary installation, and worm screw assembly is engaged with worm gear assembly;
(2) pressure F is applied to worm screw assembly, rotary worm assembly;
(3) the rotary torque T of worm screw assembly is measured;
(4) according to formula μ=T/R × F, worm and gear friction fit coefficient is calculated;
(5) draw worm and gear friction fit coefficient to beat change curve.
In described step (2), worm screw assembly applied pressure F is kept constant.
In described step (3), use the rotary torque T of torque sensor test worm screw assembly.
In described step (2) and (3), the rotational speed of worm screw assembly keeps constant.
In described step (1), be provided with back up pad in the below of described worm gear assembly, the end face of back up pad be for worm gear assembly surface contact smooth flat.
Described worm gear stationary installation and described worm screw stationary installation are arranged in described back up pad, and described worm screw assembly is horizontal above described worm gear assembly.
Described worm screw assembly adopts bearing to be connected with described worm screw stationary installation, and described worm gear assembly adopts bearing to be connected with described worm gear stationary installation.
This automobile steering system worm and gear friction fit coefficient is beated change method of testing, also comprise step: (6) are analyzed test findings, to beat change curve by analyzing worm and gear friction fit coefficient, judge that worm and gear coordinates whether to meet design requirement, if do not met the demands, by mechanism investigation lockout issue basic reason, optimal design again, retest worm and gear friction fit coefficient, until test findings is qualified.
The present invention adopts traditional friction coefficient testing method, be applied to pipe column type electric steering reducing gear turbine and worm coordinate between friction pair beat change test, method simple practical, realizes cost low; Can be mentioned by this method of testing during slowing-down structure design in early days and pinpoint the problems, evade worm and gear in advance and produce mechanicalness noise, thus reduce expense and the cycle of late design change, avoid quality problems just to find after car load to client, increase customer satisfaction degree.
Accompanying drawing explanation
Fig. 1 be reducing gear turbine and worm friction fit coefficient beat change proving installation front view;
Fig. 2 be reducing gear turbine and worm friction fit coefficient beat change proving installation side view;
Fig. 3 is that normal friction factor is beated change change curve;
Fig. 4 is that abnormal friction factor is beated change change curve;
Mark in above-mentioned figure is: 1, worm screw assembly; 2, worm gear assembly; 3, back up pad; 4, worm screw stationary installation; 5, worm gear stationary installation.
Embodiment
Below in conjunction with accompanying drawing and related content, the present invention will be further described:
By the description to embodiment, to the specific embodiment of the present invention as the mutual alignment between involved each several part and annexation etc., be described in further detail, with help those skilled in the art to design of the present invention, technical scheme implement more complete, accurate and deep understanding.
As shown in Figure 1 and Figure 2, the friction factor of mating surface can be measured for the matching relationship between the parts worm screw assembly 1 of the reducing gear of pipe column type electric steering and worm gear assembly 2 by the present invention, and the variable quantity of beating of friction factor can be measured.
Specifically, a kind of automobile steering system worm and gear of the present invention friction fit coefficient is beated change method of testing, and it comprises step:
(1) be arranged in worm gear stationary installation 5 by rotatable for worm gear assembly 2, be arranged on rotatable for worm screw assembly 1 in worm screw stationary installation 4, and worm screw assembly 1 is engaged with worm gear assembly 2;
(2) pressure F is applied to worm screw assembly 1, rotary worm assembly 1;
(3) the rotary torque T of worm screw assembly 1 is measured;
(4) according to formula μ=T/R × F, worm and gear friction fit coefficient is calculated;
(5) draw worm and gear friction fit coefficient to beat change curve.
The worm gear assembly 2 of reducing gear is made up of axle and the worm gear be set on this axle, and the main part of worm screw assembly 1 is the worm screw engaged with worm gear.In above-mentioned steps (1), be also provided with one piece of back up pad 3 in the below of described worm gear assembly 2, the end face of back up pad 3 be for worm gear assembly 2 surface contact smooth flat.Back up pad 3 is horizontal positioned, and the surface of contact of back up pad 3 ensures enough smooth, ensures that friction force between worm gear assembly 2 and back up pad 3 is close to 0.
As depicted in figs. 1 and 2, worm gear stationary installation 5 and worm screw stationary installation 4 are for be vertically arranged in back up pad 3, and worm gear stationary installation 5 and worm screw stationary installation 4 can be fixed block.Then adopt worm gear stationary installation 5 that worm gear assembly 2 is fixed, worm gear assembly 2 and back up pad 3 close contact is ensured after fixing, worm gear stationary installation 5 adopts bearing to be connected with worm gear assembly 2, ensure after fixing that worm gear assembly 2 can axially freely rotate, the type that the requirement bearing for solid bearing adopts self friction power the smaller the better.
Then according to the actual design status requirement of the reducing gear of pipe column type electric steering, worm screw assembly 1 is assembled on worm gear assembly 2, then by worm screw stationary installation 4, worm screw assembly 1 is fixed, worm screw stationary installation 4 adopts bearing to be connected with worm screw assembly 1, ensure after fixing that worm screw assembly 1 can axially freely rotate, the type that the requirement bearing for solid bearing adopts self friction power the smaller the better; Build to the change proving installation of beating of whole reducing gear turbine and worm friction fit coefficient here.
In above-mentioned steps (2), keep constant to worm screw assembly 1 applied pressure F, this pressure F is applied on the circumferential surface of worm screw assembly 1 straight down above worm screw assembly 1 with worm gear assembly 2 cooperation place, as shown in Figure 1.
In above-mentioned steps (2) and (3), rotational speed when worm screw assembly 1 rotates keeps constant, uses torque sensor to test the rotary torque T of worm screw assembly 1 in test operation process.
In above-mentioned steps (4) and (5), calculate reducing gear turbine and worm friction fit coefficient according to formula μ=T/R × F, then draw reducing gear worm and gear friction fit coefficient and to beat change curve, as shown in Figure 3, Figure 4.
This automobile steering system worm and gear friction fit coefficient is beated change method of testing, also comprise step: (6) are analyzed test findings, to beat change curve by analyzing worm and gear friction fit coefficient, judge that worm and gear coordinates whether to meet design requirement, if do not met the demands, by mechanism investigation lockout issue basic reason, optimal design again, retest worm and gear friction fit coefficient, until test findings is qualified.
Above by reference to the accompanying drawings to invention has been exemplary description; obvious specific implementation of the present invention is not subject to the restrictions described above; as long as have employed the improvement of the various unsubstantialities that method of the present invention is conceived and technical scheme is carried out; or design of the present invention and technical scheme directly applied to other occasion, all within protection scope of the present invention without to improve.
Claims (8)
1. automobile steering system worm and gear friction fit coefficient is beated change method of testing, it is characterized in that, comprises step:
(1) be arranged in worm gear stationary installation by rotatable for worm gear assembly, be arranged on rotatable for worm screw assembly in worm screw stationary installation, and worm screw assembly is engaged with worm gear assembly;
(2) pressure F is applied to worm screw assembly, rotary worm assembly;
(3) the rotary torque T of worm screw assembly is measured;
(4) according to formula μ=T/R × F, worm and gear friction fit coefficient is calculated;
(5) draw worm and gear friction fit coefficient to beat change curve.
2. automobile steering system worm and gear friction fit coefficient according to claim 1 is beated change method of testing, it is characterized in that, in described step (2), keeps constant to worm screw assembly applied pressure F.
3. automobile steering system worm and gear friction fit coefficient according to claim 1 and 2 is beated change method of testing, it is characterized in that, in described step (3), uses the rotary torque T of torque sensor test worm screw assembly.
4. to beat change method of testing according to the arbitrary described automobile steering system worm and gear friction fit coefficient of claims 1 to 3, it is characterized in that, in described step (2) and (3), the rotational speed maintenance of worm screw assembly is constant.
5. to beat change method of testing according to the arbitrary described automobile steering system worm and gear friction fit coefficient of Claims 1-4, it is characterized in that, in described step (1), be provided with back up pad in the below of described worm gear assembly, the end face of back up pad be for worm gear assembly surface contact smooth flat.
6. automobile steering system worm and gear friction fit coefficient according to claim 5 is beated change method of testing, it is characterized in that, described worm gear stationary installation and described worm screw stationary installation are arranged in described back up pad, and described worm screw assembly is horizontal above described worm gear assembly.
7. automobile steering system worm and gear friction fit coefficient according to claim 6 is beated change method of testing, it is characterized in that, described worm screw assembly adopts bearing to be connected with described worm screw stationary installation, and described worm gear assembly adopts bearing to be connected with described worm gear stationary installation.
8. to beat change method of testing according to the arbitrary described automobile steering system worm and gear friction fit coefficient of claim 1 to 7, it is characterized in that, also comprise step:
(6) test findings is analyzed, to beat change curve by analyzing worm and gear friction fit coefficient, judge that worm and gear coordinates whether to meet design requirement, if do not met the demands, by mechanism investigation lockout issue basic reason, again optimal design, retests worm and gear friction fit coefficient, until test findings is qualified.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410566374.XA CN104266964B (en) | 2014-10-22 | 2014-10-22 | Automobile steering system worm and gear friction fit coefficient bounce change method of testing |
| PCT/CN2015/090383 WO2016062181A1 (en) | 2014-10-22 | 2015-09-23 | Method for testing jumpy variation in fitting friction coefficient between worm gear and worm of automobile steering system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410566374.XA CN104266964B (en) | 2014-10-22 | 2014-10-22 | Automobile steering system worm and gear friction fit coefficient bounce change method of testing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104266964A true CN104266964A (en) | 2015-01-07 |
| CN104266964B CN104266964B (en) | 2017-12-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410566374.XA Active CN104266964B (en) | 2014-10-22 | 2014-10-22 | Automobile steering system worm and gear friction fit coefficient bounce change method of testing |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN104266964B (en) |
| WO (1) | WO2016062181A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016062181A1 (en) * | 2014-10-22 | 2016-04-28 | 奇瑞汽车股份有限公司 | Method for testing jumpy variation in fitting friction coefficient between worm gear and worm of automobile steering system |
| CN110864658A (en) * | 2019-11-25 | 2020-03-06 | 南靖长青精密丝杆制造有限公司 | New energy automobile energy storage ware nut gear profile of tooth check out test set |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106443084B (en) * | 2016-09-19 | 2023-05-16 | 南京东恒通信科技有限公司 | Microwave signal intelligent plugging manipulator |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11157433A (en) * | 1997-11-27 | 1999-06-15 | Aisin Seiki Co Ltd | Road surface friction factor presuming device |
| CN1563747A (en) * | 2004-04-05 | 2005-01-12 | 王伟均 | Worm |
| CN102141505A (en) * | 2011-01-05 | 2011-08-03 | 北京交通大学 | Device and method for measuring friction coefficient under high temperature environment |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2929681Y (en) * | 2006-05-17 | 2007-08-01 | 许晓华 | Worm torque detector of worm module |
| CN102109397A (en) * | 2010-12-15 | 2011-06-29 | 天津埃柯特阀门控制设备有限公司 | Dynamic detecting device of torque of electric actuating mechanism |
| JP2014080991A (en) * | 2012-10-12 | 2014-05-08 | Jtekt Corp | Reduction gear, and electric power steering device |
| CN102980768B (en) * | 2012-12-24 | 2015-04-08 | 重庆理工大学 | Test method for measuring dynamic transmission efficiencies of actuator of AMT clutch |
| CN104266964B (en) * | 2014-10-22 | 2017-12-12 | 奇瑞汽车股份有限公司 | Automobile steering system worm and gear friction fit coefficient bounce change method of testing |
-
2014
- 2014-10-22 CN CN201410566374.XA patent/CN104266964B/en active Active
-
2015
- 2015-09-23 WO PCT/CN2015/090383 patent/WO2016062181A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11157433A (en) * | 1997-11-27 | 1999-06-15 | Aisin Seiki Co Ltd | Road surface friction factor presuming device |
| CN1563747A (en) * | 2004-04-05 | 2005-01-12 | 王伟均 | Worm |
| CN102141505A (en) * | 2011-01-05 | 2011-08-03 | 北京交通大学 | Device and method for measuring friction coefficient under high temperature environment |
Non-Patent Citations (1)
| Title |
|---|
| 陈光雄等: "摩擦系数影响摩擦噪声发生的机理研究", 《中国机械工程》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016062181A1 (en) * | 2014-10-22 | 2016-04-28 | 奇瑞汽车股份有限公司 | Method for testing jumpy variation in fitting friction coefficient between worm gear and worm of automobile steering system |
| CN110864658A (en) * | 2019-11-25 | 2020-03-06 | 南靖长青精密丝杆制造有限公司 | New energy automobile energy storage ware nut gear profile of tooth check out test set |
| CN110864658B (en) * | 2019-11-25 | 2021-10-26 | 义乌市长新传动科技有限公司 | New energy automobile energy accumulator nut gear tooth shape detection method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104266964B (en) | 2017-12-12 |
| WO2016062181A1 (en) | 2016-04-28 |
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