CN103075448B - Overrunning self-locking device - Google Patents
Overrunning self-locking device Download PDFInfo
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- CN103075448B CN103075448B CN201310008692.XA CN201310008692A CN103075448B CN 103075448 B CN103075448 B CN 103075448B CN 201310008692 A CN201310008692 A CN 201310008692A CN 103075448 B CN103075448 B CN 103075448B
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- friction plate
- inner ring
- locking device
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
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Abstract
The invention provides an overrunning self-locking device, which is used for solving the problems that the transmission efficiency of an existing sliding spiral drive is lower, the load bearing ability of the existing sliding spiral drive is poor and the self locking cannot be carried out. The overrunning self-locking device comprises a shell, an overrunning clutch, a friction plate and a loading device, wherein the shell is a hollow cylinder, and the inner end surface of one end of the shell is provided with an inner flange; the overrunning clutch is arranged in the shell and comprises an outer ring, an inner ring, a wedge piece and gaskets, the outer ring is arranged in the shell, the inner ring is arranged in the outer ring, the wedge piece is arranged between the outer ring and the inner ring, the gaskets are arranged between the outer ring and the inner ring and are arranged at two sides of the wedge piece, the outer ring is provided with an inner roller path, and the inner ring is provided with an outer roller path; the friction plate is arranged in the shell and comprises a first friction plate and a second friction plate, the first friction plate is arranged between the inner flange and one end of the outer ring, and the second friction plate is arranged at the other end of the outer ring; and the loading device comprises a press ring, an elastic device and a pressing device, wherein one side of the press ring is leaned against the second friction plate, the elastic device is arranged at the other side of the press ring, and the pressing device is leaned against the elastic device. The overrunning self-locking device provided by the invention has the beneficial effects that the transmission efficiency is high, the load bearing ability is strong, and the self locking is reliable.
Description
Technical field
The present invention relates to mechanical transmission field, refer to that one surmounts self-locking device especially.
Background technique
At present along with the development of modern technologies, mechanical transmission application is in continuous expansion, and the operating mode of use is more complicated.In mechanical transmission, not only there are substantially horizontal transmission, vertical orientations transmission, also have power screw etc.Ball-screw-transmission develops rapidly with electromechanical integration technology, require the raising of transmission accuracy, therefore, power screw are widely used in the numerical control machine tool of various precision, machining center, electronic equipment, transport crane gear, metallurgical equipment, chemical industry equipment and conventional Weapon etc.Past is based on drive motion, multiplex slip screw transmission (as trapezoidal screw), structure is simple, stable drive, energy self-locking, but transmission efficiency is lower, and rolling spiral drive efficiency is high, long working life, smooth running, transmission accuracy are high, but bear radial capacity difference, can not self-locking.When vertical orientations transmission, transmission is not only wanted to be elevated freely, if simultaneously component weight does not balance, must prevent from stopping or when after motor power-off when transmission, the reverse (falling back) produced because parts are conducted oneself with dignity, falling of inertia and cause the major accident of transmission system.
Summary of the invention
The present invention proposes one and surmounts self-locking device, solves slip screw transmission efficiency in prior art lower, and rolling spiral drive bears radial capacity difference, self-locking, component weight imbalance can not cause the problem of accident.
Technological scheme of the present invention is achieved in that
One surmounts self-locking device, comprising:
Housing, described housing is hollow cylinder, and the interior edge face of described shell one end is provided with inward flange;
Free wheel device, be arranged in described housing, comprise the outer shroud be arranged in described housing, the inner ring be arranged in described outer shroud, be arranged at the wedging part between described outer shroud and described inner ring and be arranged between described outer shroud and described inner ring and be arranged at the pad of described wedging part both sides, described outer shroud is provided with interior raceway, and described inner ring is provided with outer raceway;
Friction plate, is arranged in described housing, comprises the first friction plate be arranged between described inward flange and described outer shroud one end and the second friction plate being arranged at the described outer shroud the other end;
Deceleration loading device, for being described friction plate on-load pressure, making described friction plate and described housing rely on frictional force to be integrated without being rigidly connected, comprising side and being resisted against the pressure ring on described second friction plate, the elastic device being arranged at described pressure ring opposite side, the hold down gag be resisted against on described elastic device.
Further, described wedging part comprises:
Roller, have good concentricity after assembling for making described wedging part, described roller be several, to be arranged in described outer shroud raceway and described inner ring outward in raceway;
Voussoir, for making described outer shroud and described inner ring wedging or idle running, be provided with voussoir described in several between two described rollers of arbitrary neighborhood, described voussoir is provided with two work arc surfaces of outer raceway contact with raceway in described outer shroud and described inner ring respectively, and described voussoir is provided with slotted eye;
Spring, for making two of described voussoir described work arc surfaces outer raceway contact with raceway in described outer shroud and described inner ring all the time, the initial frictional of wedging is provided, and described voussoir is kept strokes, described spring along a circumferencial direction of described outer shroud and described inner ring through the described slotted eye on described voussoir.
Further, described hold down gag comprises:
Adjusting nut, loads on the pressure on described friction plate for adjustable elastic device, is connected with described housing, is resisted against on described elastic device;
Lock screw, for locking described adjusting nut, is connected with described adjusting nut.
Of the present inventionly surmount self-locking device, also comprise:
Stop pin, described stop pin is arranged in described housing along described housing radial direction, and described stop pin one end is resisted against on described second friction plate.
Of the present inventionly surmount self-locking device, also comprise:
Back-up ring, for carrying out axial limiting, the quantity of described back-up ring is two, is arranged at described two pads away from the side of described wedging part, is connected with described outer shroud.
Of the present inventionly surmount self-locking device, also comprise:
Bearing, for ensureing described inner ring and described outer shroud concentricity, and bearing axial force, radial force, being arranged between described pad and described back-up ring.
Preferably, described friction plate is asbestos-free friction sheet.
Preferably, the friction factor of described friction plate is 0.35 ~ 0.4.
Preferably, described elastic device is specially butterfly spring.
Beneficial effect of the present invention is:
1, of the present inventionly surmount self-locking device, compact structure, novel, transmission efficiency is high, its outer shroud not only forms overrunning clutch race with inner ring, but also pass through friction plate and the housing of outer shroud both ends of the surface, pressure ring composition friction pair, and then be connected with other driving component by housing, as long as the frictional force that outer shroud bears is in a certain limited range preset, just can give full play to the function surmounting self-locking device, guarantee transmission system lifting freely, prevent from reversing, accurate location, safe and reliable operation, avoid falling dangerous generation because of deadweight inertia, self-locking is reliable, free light, and when moment reaches certain limit, self-locking direction also can surmount, avoid the generation of major accident, have broad application prospects.
2, of the present inventionly surmount self-locking device, its wedging part adopts voussoir, and bearing capacity is large, self-locking is reliable, it is light to free.
3, of the present inventionly self-locking device is surmounted, the frictional force of the friction plate of its outer shroud both ends of the surface can be determined according to operating mode, and it is adjustable, namely with torque spanner or the homemade special spanner of band digital display, by adjusting nut, elastic device is loaded, regulate the frictional force of friction plate to a certain limited range, thus as required frictional force is freely adjusted.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technological 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 a kind of structural representation surmounting self-locking device of the present invention;
Fig. 2 is a kind of structural representation surmounting the wedging part of self-locking device of the present invention;
Fig. 3 is a kind of using state reference drawing surmounting self-locking device of the present invention.
In figure:
1, housing; 2, inward flange; 3, outer shroud; 4, inner ring; 5, pad; 6, the first friction plate; 7, the second friction plate; 8, pressure ring; 9, elastic device; 10, roller; 11, voussoir; 12, spring; 13, adjusting nut; 14, lock screw; 15, stop pin; 16, back-up ring; 17, bearing; 18, wedging part; 19, worktable; 20, take over a business; 21, nut; 22, ball screw; 23, coupling; 24, speed reducer; 25, motor.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technological 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, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
As shown in Figure 1, one of the present invention surmounts self-locking device, comprising:
Housing 1, described housing 1 is hollow cylinder, and the interior edge face of described housing 1 one end is provided with inward flange 2;
Free wheel device, be arranged in described housing 1, comprise the outer shroud 3 be arranged in described housing 1, the inner ring 4 be arranged in described outer shroud 3, be arranged at the wedging part 18 between described outer shroud 3 and described inner ring 4 and be arranged between described outer shroud 3 and described inner ring 4 and be arranged at the pad 5 of described wedging part 18 both sides, described outer shroud 3 is provided with interior raceway, and described inner ring 4 is provided with outer raceway;
Friction plate, is arranged in described housing 1, comprises the first friction plate 6 be arranged between described inward flange 2 and described outer shroud 3 one end and the second friction plate 7 being arranged at described outer shroud 3 the other end;
Deceleration loading device, for being described friction plate on-load pressure, making described friction plate and described housing 1 rely on frictional force to be integrated without being rigidly connected, comprising side and being resisted against the pressure ring 8 on described second friction plate 7, the elastic device 9 being arranged at described pressure ring 8 opposite side, the hold down gag be resisted against on described elastic device 9.
Wherein, Spielpassung is adopted between the cylindrical of described outer shroud 3 and the endoporus of housing 1.
Of the present inventionly surmount self-locking device, compact structure, novel, transmission efficiency is high, its outer shroud 3 not only forms overrunning clutch race with inner ring 4, but also pass through friction plate and the housing 1 of outer shroud 3 both ends of the surface, pressure ring 8 forms friction pair, and then be connected with other driving component by housing 1, as long as the frictional force that outer shroud 3 bears is in a certain limited range preset, just can give full play to the function surmounting self-locking device, guarantee transmission system lifting freely, prevent from reversing, accurate location, safe and reliable operation, avoid falling dangerous generation because of deadweight inertia, self-locking is reliable, free light, and when moment reaches certain limit, self-locking direction also can surmount, avoid the generation of major accident, namely it has unique function, utilize deceleration loading device, frictionally makes the outer shroud 3 of free wheel device fix, transferring power, during overload, outer shroud 3 skids, transmit and interrupt, have broad application prospects.
As shown in Figure 2, surmount in another embodiment of self-locking device of the present invention, described wedging part 18 can comprise:
Roller 10, have good concentricity after assembling for making described wedging part 18, described roller 10 is several, to be arranged in described outer shroud 3 in raceway and the outer raceway of described inner ring 4;
Voussoir 11, for making described outer shroud 3 and described inner ring 4 wedging or idle running, voussoir 11 described in several is provided with between two described rollers 10 of arbitrary neighborhood, described voussoir 11 be provided with two respectively with the work arc surface of raceway in described outer shroud 3 and the outer raceway contact of described inner ring 4, described voussoir 11 is provided with slotted eye;
Spring 12, for make two of described voussoir 11 described work arc surfaces all the time with raceway in described outer shroud 3 and the outer raceway contact of described inner ring 4, the initial frictional of wedging is provided, and described voussoir 11 is kept strokes, described spring 12 along a circumferencial direction of described outer shroud 3 and described inner ring 4 through the described slotted eye on described voussoir 11.
Wherein, described voussoir 11 is divided into some groups by roller 10, and to be evenly distributed between outer shroud 3 and inner ring 4 circumferentially, thus make outer shroud 3 and inner ring 4 wedging or idle running, the quantity of the voussoir 11 between any two adjacent rollers 10 can be 2 ~ 6, be preferably 4, can determine according to actual conditions; Roller 10 can ensure that wedging part 18 has good concentricity after assembling; Spring 12 is helical spring, its make two of voussoir 11 work arc surfaces all the time with raceway contact, provide initial frictional when wedging, be conducive to the action consistency of all voussoirs 11; Outer shroud 3, inner ring 4 slidingsurface, through overvulcanization and fine grinding process, become a complete cylindrical body, ensure that they can bear with the positive pressure that produces in voussoir 11 wedging process and surmount the force of sliding friction produced in process; Pad 5 is fixed on predetermined axial position by voussoir 11, makes voussoir 11 have enough axial support surface.
Of the present inventionly surmount self-locking device, its wedging part 18 adopts voussoir 11, and bearing capacity is large, self-locking is reliable, it is light to free.
Surmount in another embodiment of self-locking device of the present invention, described hold down gag can comprise:
Adjusting nut 13, loads on the pressure on friction plate for adjustable elastic device 9, be connected with housing 1, is resisted against on elastic device 9;
Lock screw 14, for locking adjusting nut 13, is connected with adjusting nut 13.
Of the present inventionly surmount self-locking device, the frictional force of the friction plate of its outer shroud 3 both ends of the surface can be determined according to operating mode, and it is adjustable, namely with torque spanner or the homemade special spanner of band digital display, loaded by adjusting nut 13 pairs of elastic devices 9, regulate the frictional force of friction plate to a certain limited range, thus as required frictional force is freely adjusted.
Surmount in another embodiment of self-locking device of the present invention, can also comprise:
Stop pin 15, described stop pin 15 is arranged in housing 1 along housing 1 radial direction, and stop pin 15 one end is resisted against on the second friction plate 7.
Surmount in another embodiment of self-locking device of the present invention, can also comprise:
Back-up ring 16, for carrying out axial limiting, the quantity of back-up ring 16 is two, is arranged at the side of two pads 5 away from wedging part 18, is connected with outer shroud 3.
Wherein, particularly, two pads 5 are arranged between two back-up rings 16, and wedging part 18 is arranged between two pads 5.
Surmount in another embodiment of self-locking device of the present invention, can also comprise:
Bearing 17, for ensureing described inner ring 4 and described outer shroud 3 concentricity, and bearing axial force, radial force, being arranged between described pad 5 and described back-up ring 16.
Wherein, bearing 17 not only for ensureing inner ring 4 and outer shroud 3 concentricity, can also bear axis, radial force, and Load Balanced during guarantee wedging, also can deduct according to actual conditions and installation conditions.
Wherein, preferably, described friction plate is asbestos-free friction sheet.Asbestos-free friction sheet can be semi-metallic lining, few metal friction sheet, organic friction plate such as ceramic friction plate, powder metallurgy friction plate etc.Certainly, described friction plate can also be the friction plate of other kind, such as copper friction plate, as long as it can meet actual demand, the present invention does not limit this.
Wherein, preferably, the friction factor of described friction plate is 0.35 ~ 0.4.Certainly, according to actual needs, can also be other value, the present invention limit this friction factor of friction plate.
Wherein, preferably, described elastic device 9 is specially butterfly spring.Certainly, elastic device 9 can also be the elastic device of other type, and the present invention does not limit this.
The principle surmounting self-locking device of the present invention is:
Surmount outer shroud 3 endoporus in the housing 1 of self-locking device and inner ring 4 external diameter formation raceway, wedging part 18 is placed in raceway, and outer shroud 3 both ends of the surface and friction plate become friction pair part, apply moment by adjusting nut 13 and elastic device 9 pairs of friction plates, outer shroud 3 and housing 1 are fixedly connected by the effect of frictionally.When deployed, first inner ring 4 adopted key or alternate manner to connect with main shaft a certain in transmission system, outer shroud 3 both ends of the surface frictionally is connected with housing 1, and housing 1 is connected in transmission system by bolt or alternate manner.When inner ring 4 is rotated, because outer shroud 4 is fixed, the frictional force of the pressure of elastic device 9 and raceway and voussoir 11 forces voussoir 11 to rotate around itself and outer shroud 3 point of contact, because of the radial distance (caused by voussoir 11 two circular arc working surface bias) in certain raceway gap that height (Support Level) size is greater than inner ring 4, outer shroud 3 is formed of voussoir 11, then voussoir 11 is by wedging, thus make inner ring 4 by wedging, reach check (self-locking) state.If when inner ring counter-rotation, then voussoir 11 solderless wrapped connection contact counter-rotation, the position of voussoir 11 other direction height dimension is made to be between the raceway of inner ring 4, outer shroud 3 formation, because size is less than the radial clearance between inner ring 4 and outer shroud 3 for this reason, voussoir 11 can not by wedging, inner ring 4 free-runing operation in reverse direction.
Of the present inventionly surmounting self-locking device to better illustrate, being now exemplified below:
As shown in Figure 3, ball screw 22 is right-handed threads, when nut 21 falls because of deadweight inertia by axial force and worktable 19, ball screw 22 can be impelled to rotate counterclockwise, therefore during assembling, should make that of the present invention to surmount when self-locking device (being arranged at below speed reducer 24) rotates counterclockwise be check (self-locking), when rotating clockwise for surmounting (idle running).When motor 25 starts, motor 25 drives ball screw 22 to rotate clockwise by coupling 23, speed reducer 24, at this moment the self-locking device that surmounts of the present invention is in and surmounts (idle running) state, and nut 21 is along with ball screw 22 dextrorotation then rise, head on 20 and worktable 19 rise.When motor 25 stops, when nut 21 is subject to axial force and worktable 19 because of deadweight inertia whereabouts moment, make ball screw 22 rotate counterclockwise tendency, but now the self-locking device that surmounts of the present invention is in check (self-locking) state, thus prevention ball screw 22 reverses and worktable 19 declines.As needed worktable 19 to decline, at this moment just must add one and being greater than the friction torque that friction plate is applied to outer shroud 3, outer shroud 3 be lost and being fixedly connected of housing 1, makes it be in the slipping state that freely operates.At this moment the self-locking device that surmounts of the present invention also loses check (self-locking) effect, and worktable 19 just can be made manually or automatically to decline.When stopping behind needs position, the moment added by reduction, makes outer shroud 3 being fixed with one with housing 1 without rigidity, and the self-locking device that surmounts of the present invention recovers again check (self-locking) state, and now worktable 19 is parked on the position of requirement.
The self-locking device that surmounts of the present invention is applicable to the various occasion such as vertical orientations, power screw, support the use especially for ball screw pair or miscellaneous part, can prevent from reversing, accurate location, self-locking is reliable, easy to adjust, safe and reliable, avoid the generation of major accident, have broad application prospects.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. surmount a self-locking device, it is characterized in that, comprising:
Housing (1), described housing (1) is hollow cylinder, and the interior edge face of described housing (1) one end is provided with inward flange (2);
Free wheel device, be arranged in described housing (1), comprise the outer shroud (3) be arranged in described housing (1), be arranged at the inner ring (4) in described outer shroud (3), be arranged at the wedging part (18) between described outer shroud (3) and described inner ring (4) and be arranged between described outer shroud (3) and described inner ring (4) and be arranged at the pad (5) of described wedging part (18) both sides, described outer shroud (3) is provided with interior raceway, described inner ring (4) is provided with outer raceway, Spielpassung is adopted between the cylindrical of described outer shroud (3) and the endoporus of described housing (1),
Friction plate, be arranged in described housing (1), comprise the first friction plate (6) be arranged between described inward flange (2) and described outer shroud (3) one end and the second friction plate (7) being arranged at described outer shroud (3) the other end;
Deceleration loading device, for being described friction plate on-load pressure, making described friction plate and described housing (1) rely on frictional force to be integrated without being rigidly connected, comprising side and being resisted against the pressure ring (8) on described second friction plate (7), the elastic device (9) being arranged at described pressure ring (8) opposite side, the hold down gag be resisted against on described elastic device (9).
2. according to claim 1ly surmount self-locking device, it is characterized in that, described wedging part (18) comprising:
Roller (10), after assembling for making described wedging part (18), there is good concentricity, described roller (10) is several, is arranged in described outer shroud (3) interior raceway and described inner ring (4) outer raceway;
Voussoir (11), for making described outer shroud (3) and described inner ring (4) wedging or idle running, voussoir described in several (11) is provided with between two described rollers (10) of arbitrary neighborhood, described voussoir (11) be provided with two respectively with the work arc surface of described outer shroud (3) interior raceway and described inner ring (4) outer raceway contact, described voussoir (11) is provided with slotted eye;
Spring (12), for make two of described voussoir (11) described work arc surfaces all the time with described outer shroud (3) interior raceway and described inner ring (4) outer raceway contact, the initial frictional of wedging is provided, and described voussoir (11) is kept strokes, described spring (12) along a circumferencial direction of described outer shroud (3) and described inner ring (4) through the described slotted eye on described voussoir (11).
3. according to claim 2ly surmount self-locking device, it is characterized in that, described hold down gag comprises:
Adjusting nut (13), loads on the pressure on described friction plate for adjustable elastic device (9), be connected with described housing (1), is resisted against on described elastic device (9);
Lock screw (14), for locking described adjusting nut (13), is connected with described adjusting nut (13).
4. according to claim 3ly surmount self-locking device, it is characterized in that, also comprise:
Stop pin (15), described stop pin (15) is arranged in described housing (1) along described housing (1) radial direction, and described stop pin (15) one end is resisted against on described second friction plate (7).
5. according to claim 4ly surmount self-locking device, it is characterized in that, also comprise:
Back-up ring (16), for carrying out axial limiting, the quantity of described back-up ring (16) is two, is arranged at described two pads (5) away from the side of described wedging part (18), is connected with described outer shroud (3).
6. according to claim 5ly surmount self-locking device, it is characterized in that, also comprise:
Bearing (17), for ensureing described inner ring (4) and described outer shroud (3) concentricity, and bearing axial force, radial force, being arranged between described pad (5) and described back-up ring (16).
7. according to claim 6ly surmount self-locking device, it is characterized in that, described friction plate is asbestos-free friction sheet.
8. according to claim 7ly surmount self-locking device, it is characterized in that, the friction factor of described friction plate is 0.35 ~ 0.4.
9. according to claim 6ly surmount self-locking device, it is characterized in that, described elastic device (9) is specially butterfly spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310008692.XA CN103075448B (en) | 2013-01-09 | 2013-01-09 | Overrunning self-locking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310008692.XA CN103075448B (en) | 2013-01-09 | 2013-01-09 | Overrunning self-locking device |
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| Publication Number | Publication Date |
|---|---|
| CN103075448A CN103075448A (en) | 2013-05-01 |
| CN103075448B true CN103075448B (en) | 2015-07-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310008692.XA Active CN103075448B (en) | 2013-01-09 | 2013-01-09 | Overrunning self-locking device |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104832573B (en) * | 2015-05-12 | 2017-12-26 | 中南大学 | Work brake apparatus and its lifting appliance of application |
| CN106015314B (en) * | 2016-07-28 | 2019-04-12 | 西安交通大学 | A kind of stiffness-adjustable bush(ing) bearing of the tile fragment fulcrum with spring |
| CN110288961B (en) * | 2019-06-03 | 2021-05-07 | 湖南城市学院 | Piano keyboard adjusting device and adjusting method using same |
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| CN1472447A (en) * | 2002-06-27 | 2004-02-04 | ������������ʽ���� | Monoway clutch |
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| CN102192255A (en) * | 2010-09-09 | 2011-09-21 | 徐州五洋科技有限公司 | Safety clutch for drilling machine |
| CN203051578U (en) * | 2013-01-09 | 2013-07-10 | 孔庆堂 | Overrunning self-locking machine |
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2013
- 2013-01-09 CN CN201310008692.XA patent/CN103075448B/en active Active
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|---|---|---|---|---|
| US5429218A (en) * | 1993-06-08 | 1995-07-04 | Ntn Corporation | Rotation transmission device |
| CN1472447A (en) * | 2002-06-27 | 2004-02-04 | ������������ʽ���� | Monoway clutch |
| CN2866963Y (en) * | 2005-12-16 | 2007-02-07 | 李伟功 | Wedge type semiautomatic overrunning clutch servo disc for vehicle |
| CN102192255A (en) * | 2010-09-09 | 2011-09-21 | 徐州五洋科技有限公司 | Safety clutch for drilling machine |
| CN203051578U (en) * | 2013-01-09 | 2013-07-10 | 孔庆堂 | Overrunning self-locking machine |
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| Title |
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| 接触式异型辊逆止器的结构及其工作原理;孔庆堂;《起重运输机械》;19830630(第6期);第36页以及附图2 * |
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| CN103075448A (en) | 2013-05-01 |
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Effective date of registration: 20160622 Address after: 102299 No. 12, torch street, Changping Town, Beijing, Changping District Patentee after: Beijing Xinxing Overunning Clutch Co.,Ltd. Address before: 102206 No. 157, Changping Road, Shahe Town, Beijing, Changping District Patentee before: Kong Qingtang |