CN201885839U - Precise ball-screw pair friction mechanism research experiment table - Google Patents
Precise ball-screw pair friction mechanism research experiment table Download PDFInfo
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- CN201885839U CN201885839U CN2010206424762U CN201020642476U CN201885839U CN 201885839 U CN201885839 U CN 201885839U CN 2010206424762 U CN2010206424762 U CN 2010206424762U CN 201020642476 U CN201020642476 U CN 201020642476U CN 201885839 U CN201885839 U CN 201885839U
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Abstract
The utility model discloses a precise ball-screw pair friction mechanism research experiment table comprising a ball screw pair. A moment sensor for acquiring the friction moment of the ball screw pair is arranged on a screw; the ball screw pair comprises a flange type nut; a screw support and an axially sliding support are respectively arranged at two ends of the screw; one end of the screw, at the same side with the axial sliding support, is connected with an axial force sensor and is connected with one end of the axial force sensor; the other end of the axial force sensor is connected with an oil hydraulic cylinder and is connected with a piston rod of the oil hydraulic cylinder; the flange type nut is sheathed with an angular contact bearing; a connecting block is arranged outside the angular contact bearing; an axially sliding bracket is connected on the connecting block; a motor is arranged on the axially sliding bracket; the power output of the motor is transmitted to the flange type nut by belt transmission; and the flange type nut, the inner ring of the angular contact bearing and a driven wheel in the belt transmission are fixedly connected with one another.
Description
Technical field
The utility model relates to a kind of friction mechanism research experiment platform of precise ball screw pair.
Background technology
The moment of friction of ball-screw is meant the various friction factors moment of resistance that motion constitutes to ball-screw, and it has reflected the system responses of ball-screw friction, is the important performance characteristic of ball-screw.Along with the ball-screw performance constantly improves, moment of friction becomes the major obstacle of its high precision, high-speed development.The excessive transmission efficiency that reduced of moment of friction, its extremely jiggly performance has influenced the bearing accuracy of ball-screw, and it directly causes energy loss and temperature rise, and undue temperature rise produces thermal deformation influences bearing accuracy, and aggravation is worn and torn, the reduction lubricant effect, has shortened the serviceable life of ball-screw.
The used sensor of the proving installation of ball screw assembly, moment of friction of the prior art all is a force transducer, the patent No. be No. 201010115927.1 the Chinese utility model patent and the patent No. be 200620161149.9 utility model patent disclosed just all be the contacted cantilever in test side that on nut, is provided with force cell, utilize force cell to collect the respective signal of the moment of friction of ball screw assembly, to be tested, this method of testing is under the not high situation of physical construction precision, can when factored moment, introduce error by the arm of force, the more important thing is that these testing apparatuss can't apply axial load, can only measure the dynamic pre-fastening moment under the no-load condition, can't measure the moment of friction of ball screw assembly, under loading, its measurement data and actual condition differ greatly, can not be used for the research of ball screw assembly, friction mechanism, can not ask the method that reduces the ball-screw frictional dissipation to offer help record.
Simultaneously, the patent No. is 201010101178.7 and 201010039688.6 the axial loading structure of the disclosed ball screw assembly, of Chinese utility model patent, but its design feature has determined to install and measure the device of moment of friction.Therefore, also not occurring at present one is used for ball screw assembly, promptly can applies the research experiment platform that moment of friction can be accurately measured in axial loading again on nut.
The utility model content
The utility model is the problem that exists at existing ball screw assembly, friction torque test technology, provides a kind of measuring accuracy height to can be used for ball screw assembly, friction mechanism research experiment platform under high speed, the high year operating mode.
The utility model adopts following technical scheme:
A kind of precise ball screw pair friction mechanism research experiment platform, comprise: ball screw assembly,, on leading screw, be connected with the torque sensor of the moment of friction that is used to obtain ball screw assembly,, described ball screw assembly, comprises the flange-type nut, be respectively equipped with leading screw supports and the support that endwisely slips at the leading screw two ends, leading screw with the end that supports homonymy that endwisely slips on be connected with axial force transducer and be connected with an end of axial force transducer, on the other end of axial force transducer, be connected with oil hydraulic cylinder and be connected with the piston rod of oil hydraulic cylinder, on the flange-type nut, be arranged with angular contact bearing, outside at angular contact bearing is provided with contiguous block, on contiguous block, be connected with support in axial sliding, be provided with motor on the support in axial sliding, the power output of motor passes to flange-type nut and described flange-type nut through the band transmission, engaged wheel in the inner ring of angular contact bearing and the band transmission is mutually permanently connected.
Remove in addition, the utility model also has the following advantages:
When (1) driving as the master with leading screw, nut is an output source, the friction force of ball screw assembly, makes nut rotate, want to record this power, need the design constraint nut to rotatablely move and obtain the device of this constraining force size, as will on nut, applying axial load, then can duplicate restricted problem to rotatablely moving with friction measurement device, the power that makes measure this moment is not only the friction force of ball screw assembly,, also comprise distance rod torsional deformation stress, pass between the two is non-linear, can't solve the size of friction force separately, the high more distance rod torsional deformation of speed is serious more, therefore, middle low speed can not accurately measure the size of ball-screw friction force down, and the data error of measuring down is bigger at a high speed.
As directly on nut, not applying axial load, and give nut by being provided with on the nut with the contacted cantilever indirect transfer of force transducer load, increase along with axial load, can produce juxtaposition metamorphose between the surface of contact of transmission axial load, cause friction force increase between this surface of contact, cantilever moved up and down the generation resistance, therefore, the power of measuring is not only the friction force of ball screw assembly,, also comprised the friction force of transmitting between the axial load surface of contact, therefore, in can not accurately measure the size of ball-screw friction force under the low load, the high data error of measuring down of carrying is bigger, measures so can only be used for the moment of friction of the lower Miniature ball lead screw pair of load.
Prior art all drives with leading screw and makes nut make rotation and rectilinear motion, and design axially loads and the friction measurement structure in any case, all is difficult to accurately measure the size of ball-screw friction force, more can not be used for high at a high speed research of carrying friction force under the situation.In view of the above, the utility model has been done thorough improvement to the structure of ball screw assembly, friction torque test experiment table, designed a kind of ball screw assembly, friction torque test experiment table with unique texture, this experiment table inputs to the driving force of servomotor by synchronous pulley the nut of ball screw assembly,, make nut become power source, nut passes to leading screw by ball with friction force, and the rotation to leading screw retrains and measures so, can obtain the ball-screw friction force.
When driving as the master with nut, can apply axial load at the axis direction of leading screw, the tightness degree that the control ball contacts with raceway and the size of normal load, when taking by the leading screw as main the driving, it is identical to load effect on the nut that moves, do not repeat constraint and can not produce to rotatablely moving of leading screw, because rotatablely moving of leading screw only can be equipped with the friction measurement device constraint by leading screw one end, be connected by the shaft coupling that can rotate freely between the piston rod of the other end and oil hydraulic cylinder, the degree of freedom and the end that are this end wrapping wire thick stick axle center rotation are restrained, the mode of this direct loading need not other power and passes the structure structure, avoided the stress of the so torsional deformation of auxiliary force transferring structure of distance rod own, be contained in the measurement numerical value of ball-screw friction force, therefore, no matter the rotating speed height, the ball-screw friction force of measurement is all very accurate.
When driving as the master with nut, leading screw is as output source, the mode of obtaining the ball-screw friction force is rotatablely moving of constraint leading screw, because the nut rotation adds the straight line action, make leading screw not have axially movable degree of freedom, the moment of friction sensor does not have yet and moves axially like this, when not only being main the driving with the leading screw, need not to be provided with moment of friction sensor and the synchronizing linkage of ball screw assembly, nut to be measured with identical axial velocity motion, the more important thing is, be installed in the also relative fixed of cantilever on the moment of friction sensor, and the adapter sleeve that only is connected on the leading screw can move freely with before and after the effect of load, as shown in Figure 4 and Figure 5, has guaranteed to have only circumferential the contact between the cantilever with the moment of friction sensor, there is not unnecessary contact, avoided heavily loaded unnecessary surface of contact friction force down, be contained in the measurement numerical value of ball-screw friction force, therefore, no matter magnitude of load, the ball-screw friction force of measurement is all very accurate.
(2) lubricating status of ball screw assembly, has material impact to the frictional behaviour between ball and raceway, and temperature directly influences its lubricating status, and wanting to study the ball screw assembly, friction mechanism will control to some extent to temperature.With nut during as active drive, greatly reduced moment of inertia, make the heat of the less generation of selected power of motor less, avoided transmitting thermal source by the mode of belt transferring power and given ball screw assembly, with heat exchange pattern, only can give the thermal source of ball screw assembly, also very little by radiant heat transfer, avoid the problem of ball screw assembly, thermal deformation, reduced the ball screw assembly, lubricating status and be subjected to Temperature Influence, got rid of the high at a high speed influence that following ball-screw subsystem is subjected to external heat source of carrying.
Effective effect of the present utility model is: experiment table can realize that the ball screw assembly, moment of friction accurately measures, situation under the feasible more realistic operating mode of measuring of data, it is fixed that simple to operate, operation moves, can be used for the research of ball screw assembly, rubbing wear mechanism, also help to record the method that reduces the ball-screw frictional dissipation and raise the efficiency of asking.
Description of drawings
Fig. 1 is the structural representation of the friction mechanism research experiment platform of precise ball screw pair under the axial visual angle, Fig. 2 is the structural representation of friction mechanism research experiment platform of the precise ball screw pair of hiding sliding support under the axial visual angle, Fig. 3 is the diagrammatic cross-section that driven pulley is connected with flange-type nut and angular contact bearing inner ring, and Fig. 4 and Fig. 5 are respectively the front view and the left view of adapter sleeve and moment of friction sensor assembling synoptic diagram.The concrete structure of precise ball screw pair friction torque test experiment table is:
1 oil hydraulic cylinder; The L type of 2 oil hydraulic cylinders supports; The piston rod of 3 oil hydraulic cylinders; 4 axial force transducers; 5 sliding supports; 6 support rails; The leading screw of 7 ball screw assembly,s; 8 flange-type nuts; 9 sliding supports; 10 support guides; The L type of 11 servomotors supports; 12 servomotors; 13 contiguous blocks; 14 angular contact bearings; 15 driven pulleys; 16 synchronous cog belts; 17 driving pulleys; 18 adapter sleeves; 19 leading screws support; 20 moment of friction sensors.
Embodiment
With reference to Fig. 1, precise ball screw pair friction mechanism research experiment platform of the present utility model comprises leading screw 7, adapter sleeve 18 is housed on leading screw 7 to be connected with the moment of friction sensor 20 that obtains ball screw assembly,, when nut drives, leading screw is executed when changeing, moment of friction sensor 20 directly obtains the moment of friction of ball screw assembly, by its cantilever rotatablely moving of leading screw of constraint, be respectively equipped with leading screw support 19 at the leading screw two ends and endwisely slip and support 5, leading screw with the ends that support 5 homonymies that endwisely slip on be connected with axial force transducer 4 and be connected with an end of axial force transducer 4, on the other end of axial force transducer 4, be connected with oil hydraulic cylinder 1 and be connected with the piston rod of oil hydraulic cylinder 1.
With reference to Fig. 2, on flange-type nut 8, be arranged with angular contact bearing 14, be provided with contiguous block 13 in the outside of angular contact bearing 14, on contiguous block 13, be connected with support 9 in axial sliding, be provided with motor 12 on the support 9 in axial sliding, the output of the power of motor 12 passes to flange-type nut 8 and described flange-type nut 8, the inner ring of angular contact bearing 14 and the engaged wheel 15 in the band transmission are mutually permanently connected through the band transmission, with reference to Fig. 3.In the present embodiment, endwisely slip and support 5 and can realize, that is: endwisely slip and support 5 and form by support rails 6 and along the supporting of support rails slippage by following concrete technical measures; Support 9 can realize that is: support 9 is formed by support guide 10 and along the rack body of support guide slippage in axial sliding by following concrete technical measures in axial sliding.
Claims (3)
1. precise ball screw pair friction mechanism research experiment platform, comprise: ball screw assembly,, on leading screw (7), be connected with the torque sensor (20) of the moment of friction that is used to obtain ball screw assembly,, it is characterized in that, described ball screw assembly, comprises flange-type nut (8), be respectively equipped with leading screw at the leading screw two ends and support (19) and the support (5) that endwisely slips, on leading screw and end support (5) homonymy that endwisely slips, be connected with axial force transducer (4) and be connected with an end of axial force transducer (4), on the other end of axial force transducer (4), be connected with oil hydraulic cylinder (1) and be connected with the piston rod of oil hydraulic cylinder (1), on flange-type nut (8), be arranged with angular contact bearing (14), be provided with contiguous block (13) in the outside of angular contact bearing (14), on contiguous block (13), be connected with support (9) in axial sliding, be provided with motor (12) on the support (9) in axial sliding, the power output of motor (12) passes to flange-type nut (8) and described flange-type nut (8) through the band transmission, engaged wheel (15) in the inner ring of angular contact bearing (14) and the band transmission is mutually permanently connected.
2. high speed ball screw assembly, friction mechanism research experiment platform according to claim 1 is characterized in that the support (5) that endwisely slips is formed by support rails (6) and along the supporting of support rails slippage.
3. high speed ball screw assembly, friction mechanism research experiment platform according to claim 1 is characterized in that support (9) is formed by support guide (10) and along the rack body of support guide slippage in axial sliding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206424762U CN201885839U (en) | 2010-12-06 | 2010-12-06 | Precise ball-screw pair friction mechanism research experiment table |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206424762U CN201885839U (en) | 2010-12-06 | 2010-12-06 | Precise ball-screw pair friction mechanism research experiment table |
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| Publication Number | Publication Date |
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| CN201885839U true CN201885839U (en) | 2011-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010206424762U Expired - Lifetime CN201885839U (en) | 2010-12-06 | 2010-12-06 | Precise ball-screw pair friction mechanism research experiment table |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102095541A (en) * | 2010-12-06 | 2011-06-15 | 东南大学 | Experiment table for studying friction mechanism of precision ball screw pair |
| CN102507182A (en) * | 2011-10-21 | 2012-06-20 | 西南交通大学 | Reconfigurable lead screw pair and guide rail pair accelerated life electro-hydraulic servo test bench |
| CN102866355A (en) * | 2012-09-25 | 2013-01-09 | 上海理工大学 | Linear motor power performance testing device used for numerical control direct feeding shaft |
| CN103990965A (en) * | 2013-02-15 | 2014-08-20 | 通用汽车环球科技运作有限责任公司 | Reconfigurable interface assembly, adaptable assembly line work-piece processor, and method |
| US9700976B2 (en) | 2013-02-15 | 2017-07-11 | GM Global Technology Operations LLC | Reconfigurable interface assembly, adaptable assembly line work-piece processor, and method |
| CN111521392A (en) * | 2020-05-25 | 2020-08-11 | 南京理工大学 | Ball and rolling linear guide rail reverser friction torque detection device |
-
2010
- 2010-12-06 CN CN2010206424762U patent/CN201885839U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102095541A (en) * | 2010-12-06 | 2011-06-15 | 东南大学 | Experiment table for studying friction mechanism of precision ball screw pair |
| CN102095541B (en) * | 2010-12-06 | 2012-06-27 | 东南大学 | Experiment table for studying friction mechanism of precision ball screw pair |
| CN102507182A (en) * | 2011-10-21 | 2012-06-20 | 西南交通大学 | Reconfigurable lead screw pair and guide rail pair accelerated life electro-hydraulic servo test bench |
| CN102507182B (en) * | 2011-10-21 | 2014-01-29 | 西南交通大学 | Reconfigurable lead screw pair and guide rail pair accelerated life electro-hydraulic servo test bench |
| CN102866355A (en) * | 2012-09-25 | 2013-01-09 | 上海理工大学 | Linear motor power performance testing device used for numerical control direct feeding shaft |
| CN102866355B (en) * | 2012-09-25 | 2014-10-29 | 上海理工大学 | Linear motor power performance testing device used for numerical control direct feeding shaft |
| CN103990965A (en) * | 2013-02-15 | 2014-08-20 | 通用汽车环球科技运作有限责任公司 | Reconfigurable interface assembly, adaptable assembly line work-piece processor, and method |
| US9700976B2 (en) | 2013-02-15 | 2017-07-11 | GM Global Technology Operations LLC | Reconfigurable interface assembly, adaptable assembly line work-piece processor, and method |
| US10780537B2 (en) | 2013-02-15 | 2020-09-22 | GM Global Technology Operations LLC | Reconfigurable interface assembly, adaptable assembly line work-piece processor, and method |
| CN111521392A (en) * | 2020-05-25 | 2020-08-11 | 南京理工大学 | Ball and rolling linear guide rail reverser friction torque detection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110629 Effective date of abandoning: 20120627 |