CN102879190B - Verifying device and verifying method for abnormal sound of automobile shaft sleeves - Google Patents
Verifying device and verifying method for abnormal sound of automobile shaft sleeves Download PDFInfo
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- CN102879190B CN102879190B CN201210369411.9A CN201210369411A CN102879190B CN 102879190 B CN102879190 B CN 102879190B CN 201210369411 A CN201210369411 A CN 201210369411A CN 102879190 B CN102879190 B CN 102879190B
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- axle sleeve
- automobile axle
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- temperature
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Abstract
The invention provides a verifying device and a verifying method for abnormal sound of automobile shaft sleeves, and relates to the technical field of detection for automobile parts. Problems that accuracy is low, cost is high, and abnormal sound of an automobile shaft sleeve cannot be pertinently eliminated in a process for detecting the abnormal sound of the automobile shaft sleeve by a pavement test are solved. The verifying device only comprises a rocker assembly, support blocks and a base, accordingly, is simple in structure, is portable, and can be placed in environments without environmental noise or noise of automobiles to verify the abnormal sound of the automobile shaft sleeves, and accuracy of the verifying device is improved. In addition, assembly of an integral automobile for a pavement test is omitted, so that cost is saved. Besides, as the rocker assembly is fixed onto a body of an automobile shaft sleeve and can drive the body to move along, a movement condition of the automobile shaft sleeve when the automobile runs on a pavement can be simulated, reasons causing abnormal sound of the automobile shaft sleeve can be found out, and the problem of the abnormal sound of the automobile shaft sleeve can be pertinently solved. The verifying device and the verifying method are mainly used for detecting various automobile shaft sleeves.
Description
Technical field
The present invention relates to auto parts machinery detection technique field, particularly relate to automobile axle sleeve abnormal sound demo plant and verification method.
Background technology
Automobile axle sleeve is fixed in the propons of automobile chassis, back axle, for the connection in automobile between parts, and friction and wear when can reduce running car between parts.
Fig. 1 shows the structure of automobile axle sleeve, and this automobile axle sleeve comprises: body 11, end plate 12; Body 11 is made up of the first rubber assembly 111 and the second rubber assembly 112, and the first rubber assembly 111 interference is socketed on the second rubber assembly 112; A centre of surface of end plate 12 is installed with minor axis 122, and another centre of surface is installed with web joint 123, and web joint 123 is provided with through hole 13, for being fixedly connected with the parts in automobile; Minor axis 122 is connected with the second rubber assembly 112 interference, and surface adjacent between end plate 12 and the second rubber assembly 112 can be made mutually to compress, seamless.
When running car is by distortion road surface, propons or the back axle of automobile chassis there will be abnormal sound, in order to determine whether this abnormal sound is that automobile axle sleeve sends, technician needs first to assemble car load, then pavement test is carried out to the car load of this assembling, then rely on experience by listening the mode of sound to search the automobile axle sleeve sending abnormal sound.After determining which automobile axle sleeve sends abnormal sound, by adding lubricant in this automobile axle sleeve, solve automobile axle sleeve abnormal sound problem.
Use above-mentioned automobile axle sleeve abnormal sound verification method time, due to the factor such as neighbourhood noise, the noise of automobile own that may exist, may influence technique personnel to the judgement of abnormal sound, the accuracy of checking therefore can be made to reduce.And need a large amount of manpower due to assembling car load, and pavement test is carried out to car load need to spend more time, make checking cost higher; In addition, can only determine that by listening the mode of sound which automobile axle sleeve sends abnormal sound, and the reason of automobile axle sleeve abnormal sound can not be found out, therefore cannot solve automobile axle sleeve abnormal sound problem targetedly according to abnormal sound reason.
Summary of the invention
Embodiments of the invention provide a kind of automobile axle sleeve abnormal sound demo plant and verification method, solve and are being detected in the process of automobile axle sleeve abnormal sound by pavement test, and accuracy is low, cost is higher and cannot solve the problem of automobile axle sleeve abnormal sound pointedly.
For achieving the above object, embodiments of the invention adopt following technical scheme:
A kind of automobile axle sleeve abnormal sound demo plant, comprising: rocking bar assembly, back-up block and base; Described back-up block one end is fixed on described base, and the other end is fixedly connected with the web joint of described automobile axle sleeve, to be supported in above described base by described automobile axle sleeve; Described rocking bar assembly suit is fixed on the body of described automobile axle sleeve, drives described body to move together to make described rocking bar assembly.
Preferably, described rocking bar assembly is provided with tapped through hole and hold-down bolt, the external thread of described hold-down bolt and the screw-internal thread fit of described tapped through hole through described tapped through hole.
Further, described rocking bar assembly outside surface is provided with rocking bar.
Preferably, also comprise set bolt, the described back-up block other end, through the through hole on described web joint, is fixedly connected with described web joint by described set bolt.
A kind of automobile axle sleeve abnormal sound verification method, use above-mentioned automobile axle sleeve abnormal sound demo plant, comprise: the back-up block other end web joint of automobile axle sleeve to be measured being fixedly connected on described automobile axle sleeve abnormal sound demo plant, and the rocking bar assembly of described automobile axle sleeve abnormal sound demo plant suit is fixed on the body of described automobile axle sleeve to be measured, form checking frock; Described checking frock is placed in laboratory; Be separated with the second rubber assembly by the end plate of described automobile axle sleeve to be measured, when moving to make described body, described second rubber assembly does not contact with described end plate; Adjust temperature to the first temperature in described laboratory, shake described rocking bar assembly; When described automobile axle sleeve to be measured sends abnormal sound, then determine that the friction of described body displacement is for one of described automobile axle sleeve reason sending abnormal sound to be measured.
Further, automobile axle sleeve abnormal sound verification method also comprises: adjust temperature in described laboratory to the second temperature being different from described first temperature, shake described rocking bar assembly; When described automobile axle sleeve to be measured does not send abnormal sound, then determine that the temperature in described laboratory is one of described automobile axle sleeve reason sending abnormal sound to be measured.
Preferably, when described automobile axle sleeve to be measured does not send abnormal sound, described automobile axle sleeve abnormal sound verification method also comprises: described end plate and described second rubber assembly are compressed; Adjust temperature extremely described first temperature in described laboratory, shake described rocking bar assembly; When described automobile axle sleeve to be measured sends abnormal sound, then determine that between described body and described end plate, friction of motion is one of described automobile axle sleeve reason sending abnormal sound to be measured.
Further, automobile axle sleeve abnormal sound verification method also comprises: adjust temperature extremely described second temperature in described laboratory, shake described rocking bar assembly; When described automobile axle sleeve to be measured does not send abnormal sound, then determine that the temperature in described laboratory is one of described automobile axle sleeve reason sending abnormal sound to be measured.
Preferably, temperature in the described laboratory of described adjustment is to described first temperature, shake between two sub-steps in the step of described rocking bar assembly, also comprise: described checking frock is left standstill the fixed time, equal described first temperature to make the temperature of described automobile axle sleeve to be measured.
And further, temperature in the described laboratory of described adjustment is to the second temperature being different from described first temperature, shake between two sub-steps in the step of described rocking bar assembly, also comprise: described checking frock is left standstill the fixed time, equal described second temperature to make the temperature of described automobile axle sleeve to be measured.
In the automobile axle sleeve abnormal sound demo plant that the embodiment of the present invention provides and verification method, owing to only including rocking bar assembly, back-up block and base, structure is simple, light, device is placed in do not exist the environment of neighbourhood noise and the noise of automobile own to be verified, improves accuracy; Owing to not needing assembling car load to carry out pavement test, therefore save cost; In addition because rocking bar assembly suit is fixed on the body of described automobile axle sleeve, and body can be driven to move together, thus the moving situation of automobile automobile axle sleeve when road traveling can be imitated, find out the reason of automobile axle sleeve abnormal sound, and then automobile axle sleeve abnormal sound problem can be solved pointedly.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of automobile axle sleeve in prior art;
The structural representation being provided with the automobile axle sleeve abnormal sound demo plant of automobile axle sleeve to be measured that Fig. 2 provides for the embodiment of the present invention;
The process flow diagram of a kind of automobile axle sleeve abnormal sound verification method that Fig. 3 provides for the embodiment of the present invention;
The process flow diagram of the another kind of automobile axle sleeve abnormal sound verification method that Fig. 4 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under the prerequisite of not making creative work, all belongs to the scope of protection of the invention.
Embodiment 1
The present embodiment provides a kind of automobile axle sleeve abnormal sound demo plant, as shown in Figure 2, comprising: rocking bar assembly 21, back-up block 22 and base 23; Back-up block 22 one end is fixed on base 23, and the other end is fixedly connected with the web joint 123 of automobile axle sleeve, to be supported in above base 23 by automobile axle sleeve; Rocking bar assembly 21 suit is fixed on the body 11 of automobile axle sleeve, drives body 11 to move together to make rocking bar assembly 21.
Below the principle of work of above-mentioned automobile axle sleeve abnormal sound demo plant is described in detail.
Generally, the reason causing automobile axle sleeve to produce abnormal sound mainly contains three kinds: the first, environment temperature is on the impact of automobile axle sleeve; The second, the fricative impact of body 11 displacement of automobile axle sleeve; The third, the impact that between the body 11 of automobile axle sleeve and end plate 12, friction of motion produces.
When using above-mentioned automobile axle sleeve abnormal sound demo plant to carry out abnormal sound checking to automobile shafts cover to be measured, first the end plate 12 of automobile axle sleeve to be measured is separated with the second rubber assembly 112, when moving to make body 11, second rubber assembly 112 does not contact with end plate 12, again the web joint 123 of automobile axle sleeve to be measured is fixedly connected on back-up block 22 other end of automobile axle sleeve abnormal sound demo plant, rocking bar assembly 21 suit of automobile axle sleeve abnormal sound demo plant is fixed on the body 11 of automobile axle sleeve to be measured, be assembled into checking frock, again the checking frock assembled is placed in laboratory, then temperature to the first temperature in regulation experiment room, finally shakes rocking bar assembly 21 by operating personnel, moves together to drive the body 11 of automobile axle sleeve to be measured.
At temperature constant, body 11 with in end plate 12 friction free situation, when automobile axle sleeve to be measured sends abnormal sound, then determine that the friction of body 11 displacement is for one of automobile axle sleeve reason sending abnormal sound to be measured; Subsequently can temperature in regulation experiment room to the second temperature being different from described first temperature, then rocking bar assembly 21 is shaken by operating personnel, move together to drive the body 11 of automobile axle sleeve to be measured, temperature constant, body 11 are with in end plate 12 friction free situation, when automobile axle sleeve to be measured does not send abnormal sound, then determine that the temperature in described laboratory is one of described automobile axle sleeve reason sending abnormal sound to be measured.
When the temperature in above-mentioned laboratory is the first temperature, when being shaken rocking bar assembly 21 by operating personnel, if automobile axle sleeve to be measured does not send abnormal sound, then determine that the friction of body 11 displacement is not the reason that automobile axle sleeve to be measured sends abnormal sound, next the end plate 12 of automobile axle sleeve and the second rubber assembly 112 can be compressed, when moving to make body 11, between the second rubber assembly 112 and end plate 12, there is friction of motion, rear checking frock will be ressembled be placed in laboratory; Temperature to the first temperature in regulation experiment room, finally shakes rocking bar assembly 21 by operating personnel, moves together to drive the body 11 of automobile axle sleeve to be measured.
In temperature constant, when end plate 12 and the second rubber assembly 112 exist friction of motion, when automobile axle sleeve to be measured sends abnormal sound, then determine that between body 11 and end plate 12, friction of motion is one of automobile axle sleeve reason sending abnormal sound to be measured; Temperature again in regulation experiment room is to the second temperature being different from described first temperature, then rocking bar assembly 21 is shaken by operating personnel, move together to drive the body 11 of automobile axle sleeve to be measured, temperature constant, when there is friction of motion in end plate 12 and the second rubber assembly 112, when automobile axle sleeve to be measured does not send abnormal sound, then determine that the temperature in laboratory is one of automobile axle sleeve reason sending abnormal sound to be measured.
In the automobile axle sleeve abnormal sound demo plant that the present embodiment provides, owing to only including rocking bar assembly, back-up block and base, structure is simple, light, device is placed in do not exist the environment of neighbourhood noise and the noise of automobile own to be verified, improves accuracy; Owing to not needing assembling car load to carry out pavement test, therefore save cost; In addition because rocking bar assembly suit is fixed on the body of described automobile axle sleeve, and body can be driven to move together, thus the moving situation of automobile automobile axle sleeve when road traveling can be imitated, find out the reason of automobile axle sleeve abnormal sound, and then automobile axle sleeve abnormal sound problem can be solved pointedly.
In the automobile axle sleeve abnormal sound demo plant that above-described embodiment describes, rocking bar assembly 21 can be provided with tapped through hole and hold-down bolt 24, the external thread of described hold-down bolt 24 and the screw-internal thread fit of described tapped through hole through described tapped through hole.Rocking bar assembly 21 can be changed be sleeved on elasticity on body 11 by twisting hold-down bolt 24, facilitate fixing on body 11 of rocking bar assembly 21.
In the automobile axle sleeve abnormal sound demo plant that above-described embodiment describes, rocking bar assembly 21 outside surface can be provided with rocking bar 25.Operating personnel can complete the shake of rocking bar assembly by manual rocking bar 25, simple operation.
In the automobile axle sleeve abnormal sound demo plant that above-described embodiment describes, can also comprise set bolt 26, back-up block 22 other end, through the through hole 13 on web joint 123, is fixedly connected with web joint 123 by set bolt 26.Back-up block 22 other end and the fixed sturcture of web joint 123 also can be that other known to those skilled in the art can complete the structure be fixedly connected with.
Embodiment 2
Present embodiments provide a kind of automobile axle sleeve abnormal sound verification method, employ the automobile axle sleeve abnormal sound demo plant that embodiment 1 describes, as shown in Figure 3, the method comprises the steps.
301, the web joint 123 of automobile axle sleeve to be measured is fixedly connected on back-up block 22 other end of automobile axle sleeve abnormal sound demo plant, and the rocking bar assembly 21 of automobile axle sleeve abnormal sound demo plant suit is fixed on the body 11 of automobile axle sleeve to be measured, form checking frock.
302, checking frock is placed in laboratory.
303, be separated with the second rubber assembly 112 by the end plate 12 of automobile axle sleeve to be measured, when moving to make body 11, the second rubber assembly 112 does not contact with end plate 12.
304, temperature to the first temperature in regulation experiment room, shake rocking bar assembly 21.
305, when automobile axle sleeve to be measured sends abnormal sound, then determine that the friction of body 11 displacement is for one of automobile axle sleeve reason sending abnormal sound to be measured.
In the automobile axle sleeve abnormal sound verification method that the embodiment of the present invention provides, because used automobile axle sleeve abnormal sound demo plant only includes rocking bar assembly, back-up block and base, structure is simple, light, device is placed in do not exist the environment of neighbourhood noise and the noise of automobile own to be verified, improves accuracy; Owing to not needing assembling car load to carry out pavement test, therefore save cost; In addition because rocking bar assembly suit is fixed on the body of described automobile axle sleeve, and body can be driven to move together, thus the moving situation of automobile automobile axle sleeve when road traveling can be imitated, find out the reason of automobile axle sleeve abnormal sound, and then automobile axle sleeve abnormal sound problem can be solved pointedly.
Embodiment 3
Present embodiments provide a kind of automobile axle sleeve abnormal sound verification method, as shown in Figure 4, the method comprises the steps.
401, the web joint 123 of automobile axle sleeve to be measured is fixedly connected on back-up block 22 other end of automobile axle sleeve abnormal sound demo plant, and the rocking bar assembly 21 of automobile axle sleeve abnormal sound demo plant suit is fixed on the body 11 of automobile axle sleeve to be measured, form checking frock.
402, checking frock is placed in laboratory.
403, be separated with the second rubber assembly 112 by the end plate 12 of automobile axle sleeve to be measured, when moving to make body 11, the second rubber assembly 112 does not contact with end plate 12.
404, temperature to the first temperature in regulation experiment room.
405, will verify that frock leaves standstill the fixed time in the lab, equal the first temperature to make the temperature of automobile axle sleeve to be measured.
406, shake rocking bar assembly 21, move together to drive the body 11 of automobile axle sleeve to be measured.
407, judge whether automobile axle sleeve to be measured sends abnormal sound, if so, then perform step 408; Otherwise, then perform step 414.
408, determine that the friction of body 11 displacement is for one of automobile axle sleeve reason sending abnormal sound to be measured.
409, the temperature in regulation experiment room is to the second temperature being different from the first temperature.
410, will verify that frock leaves standstill the fixed time in the lab, equal the second temperature to make the temperature of automobile axle sleeve to be measured.
411, shake described rocking bar assembly 21, move together to drive the body 11 of automobile axle sleeve to be measured.
412, judge whether automobile axle sleeve to be measured sends abnormal sound, if so, then perform step 421; Otherwise, then perform step 413.
413, determine that the temperature in laboratory is one of automobile axle sleeve reason sending abnormal sound to be measured.
414, end plate 12 and the second rubber assembly 112 are compressed.
Concrete when body 11 is moved, can friction of motion be produced between the second rubber assembly 112 and end plate 12.
415, step 404-406 is repeated.
416, judge whether automobile axle sleeve to be measured sends abnormal sound, if so, then perform step 417; Otherwise, then perform step 420.
417, determine that between body 11 and described end plate 12, friction of motion is one of automobile axle sleeve reason sending abnormal sound to be measured.
418, step 409-411 is repeated.
419, judge whether automobile axle sleeve to be measured sends abnormal sound, if so, then perform step 421; Otherwise, then perform step 420.
420, determine that the temperature in laboratory is one of automobile axle sleeve reason sending abnormal sound to be measured.
421, determine that the temperature in laboratory is not the reason that automobile axle sleeve to be measured sends abnormal sound.
In the automobile axle sleeve abnormal sound verification method that the embodiment of the present invention provides, because used automobile axle sleeve abnormal sound demo plant only includes rocking bar assembly, back-up block and base, structure is simple, light, device is placed in do not exist the environment of neighbourhood noise and the noise of automobile own to be verified, improves accuracy; Owing to not needing assembling car load to carry out pavement test, therefore save cost; In addition because rocking bar assembly suit is fixed on the body of described automobile axle sleeve, and body can be driven to move together, thus the moving situation of automobile automobile axle sleeve when road traveling can be imitated, find out the reason of automobile axle sleeve abnormal sound, and then automobile axle sleeve abnormal sound problem can be solved pointedly.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of described claim.
Claims (6)
1. an automobile axle sleeve abnormal sound verification method, is characterized in that, uses automobile axle sleeve abnormal sound demo plant to verify; Described automobile axle sleeve abnormal sound demo plant comprises: rocking bar assembly, back-up block and base; Described back-up block one end is fixed on described base, and the other end is fixedly connected with the web joint of described automobile axle sleeve, to be supported in above described base by described automobile axle sleeve; Described rocking bar assembly suit is fixed on the body of described automobile axle sleeve, drives described body to move together to make described rocking bar assembly;
Described automobile axle sleeve abnormal sound verification method comprises:
The web joint of automobile axle sleeve to be measured is fixedly connected on the back-up block other end of described automobile axle sleeve abnormal sound demo plant, and the rocking bar assembly of described automobile axle sleeve abnormal sound demo plant suit is fixed on the body of described automobile axle sleeve to be measured, form checking frock;
Described checking frock is placed in laboratory;
Be separated with the second rubber assembly by the end plate of described automobile axle sleeve to be measured, when moving to make described body, described second rubber assembly does not contact with described end plate;
Adjust temperature to the first temperature in described laboratory, shake described rocking bar assembly;
When described automobile axle sleeve to be measured sends abnormal sound, then determine that the friction of described body displacement is for one of described automobile axle sleeve reason sending abnormal sound to be measured.
2. automobile axle sleeve abnormal sound verification method according to claim 1, is characterized in that, also comprise:
Adjust temperature in described laboratory to the second temperature being different from described first temperature, shake described rocking bar assembly;
When described automobile axle sleeve to be measured does not send abnormal sound, then determine that the temperature in described laboratory is one of described automobile axle sleeve reason sending abnormal sound to be measured.
3. automobile axle sleeve abnormal sound verification method according to claim 1, is characterized in that, when described automobile axle sleeve to be measured does not send abnormal sound, described automobile axle sleeve abnormal sound verification method also comprises:
Described end plate and described second rubber assembly are compressed;
Adjust temperature extremely described first temperature in described laboratory, shake described rocking bar assembly;
When described automobile axle sleeve to be measured sends abnormal sound, then determine that between described body and described end plate, friction of motion is one of described automobile axle sleeve reason sending abnormal sound to be measured.
4. automobile axle sleeve abnormal sound verification method according to claim 3, is characterized in that, also comprise:
Adjust temperature in described laboratory to the second temperature being different from described first temperature, shake described rocking bar assembly;
When described automobile axle sleeve to be measured does not send abnormal sound, then determine that the temperature in described laboratory is one of described automobile axle sleeve reason sending abnormal sound to be measured.
5. the automobile axle sleeve abnormal sound verification method according to any one of claim 1 or 3, it is characterized in that, temperature in the described laboratory of described adjustment is to described first temperature, shake between two sub-steps in the step of described rocking bar assembly, also comprise: described checking frock is left standstill the fixed time, equal described first temperature to make the temperature of described automobile axle sleeve to be measured.
6. the automobile axle sleeve abnormal sound verification method according to any one of claim 2 or 4, it is characterized in that, temperature in the described laboratory of described adjustment is to the second temperature being different from described first temperature, shake between two sub-steps in the step of described rocking bar assembly, also comprise: described checking frock is left standstill the fixed time, equal described second temperature to make the temperature of described automobile axle sleeve to be measured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210369411.9A CN102879190B (en) | 2012-09-28 | 2012-09-28 | Verifying device and verifying method for abnormal sound of automobile shaft sleeves |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210369411.9A CN102879190B (en) | 2012-09-28 | 2012-09-28 | Verifying device and verifying method for abnormal sound of automobile shaft sleeves |
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| CN102879190A CN102879190A (en) | 2013-01-16 |
| CN102879190B true CN102879190B (en) | 2015-03-11 |
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| CN201210369411.9A Expired - Fee Related CN102879190B (en) | 2012-09-28 | 2012-09-28 | Verifying device and verifying method for abnormal sound of automobile shaft sleeves |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112756273A (en) * | 2018-11-08 | 2021-05-07 | 奕松杰 | Shaft sleeve inner thread detection equipment |
| CN112577594B (en) * | 2020-12-29 | 2023-05-16 | 上海渤元信息科技有限公司 | Verification device and verification method for abnormal sound of automobile shaft sleeve |
Citations (3)
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| CN2667091Y (en) * | 2003-10-31 | 2004-12-29 | 谢耀洪 | Screen window handle |
| CN101476934A (en) * | 2008-12-26 | 2009-07-08 | 洛阳轴研科技股份有限公司 | Bearing noise testing method without special requirements to testing environment |
| CN201965022U (en) * | 2010-12-29 | 2011-09-07 | 上海联合滚动轴承有限公司 | Noise measuring device for gamma star bearing |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100906896B1 (en) * | 2007-12-13 | 2009-07-08 | 현대자동차주식회사 | A jig for post thermal deformation test of automobile plastic interior parts |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2667091Y (en) * | 2003-10-31 | 2004-12-29 | 谢耀洪 | Screen window handle |
| CN101476934A (en) * | 2008-12-26 | 2009-07-08 | 洛阳轴研科技股份有限公司 | Bearing noise testing method without special requirements to testing environment |
| CN201965022U (en) * | 2010-12-29 | 2011-09-07 | 上海联合滚动轴承有限公司 | Noise measuring device for gamma star bearing |
Non-Patent Citations (1)
| Title |
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| 深井旋转轴套流场的CFD模拟;兰伟等;《探矿工程(岩土钻掘工程)》;20081130(第11期);第20－23页 * |
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Granted publication date: 20150311 Termination date: 20210928 |