CN110145580B - Anti-backlash nut structure with component health status on-line monitoring device - Google Patents
Anti-backlash nut structure with component health status on-line monitoring device Download PDFInfo
- Publication number
- CN110145580B CN110145580B CN201910567264.8A CN201910567264A CN110145580B CN 110145580 B CN110145580 B CN 110145580B CN 201910567264 A CN201910567264 A CN 201910567264A CN 110145580 B CN110145580 B CN 110145580B
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- nut
- shell
- torsion spring
- connecting block
- pressure sensor
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- 238000012806 monitoring device Methods 0.000 title claims abstract description 13
- 230000003862 health status Effects 0.000 title claims description 6
- 230000036541 health Effects 0.000 claims abstract description 12
- 239000002184 metal Substances 0.000 claims description 9
- 239000000314 lubricant Substances 0.000 claims description 5
- 238000003860 storage Methods 0.000 claims description 4
- 230000006698 induction Effects 0.000 claims description 3
- 230000009471 action Effects 0.000 claims description 2
- 230000000903 blocking effect Effects 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 abstract description 14
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H25/2003—Screw mechanisms with arrangements for taking up backlash
- F16H25/2006—Screw mechanisms with arrangements for taking up backlash with more than one nut or with nuts consisting of more than one bearing part
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H25/24—Elements essential to such mechanisms, e.g. screws, nuts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/01—Monitoring wear or stress of gearing elements, e.g. for triggering maintenance
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/045—Lubricant storage reservoirs, e.g. reservoirs in addition to a gear sump for collecting lubricant in the upper part of a gear case
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/048—Type of gearings to be lubricated, cooled or heated
- F16H57/0497—Screw mechanisms
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H25/2003—Screw mechanisms with arrangements for taking up backlash
- F16H2025/2012—Screw mechanisms with arrangements for taking up backlash using a spring member creating rotary torque for counter rotating the two nuts, e.g. a torsion bar
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Abstract
The invention discloses a gap eliminating nut structure with an on-line monitoring device for the health state of a component, which comprises a shell, a front nut, a rear nut and a torsion spring, and is characterized by further comprising a torque adjusting sleeve, a pushing nut, a middle connecting block, a tension pressure sensor, an angle sensor and a limiting card. The anti-backlash nut structure disclosed by the invention has the advantages that the layout and the assembly of the monitoring structure, including the torsion force monitoring and the rotation angle monitoring of the torsion spring, are completed in a small space range through reasonable planning, the on-line monitoring of the health state of the anti-backlash nut is realized, the anti-backlash nut structure is small in size, stable in structure, stable in operation, easy to implement, produce and manufacture, and suitable for popularization and use.
Description
Technical Field
The invention relates to the technical field of automation, in particular to a gap eliminating nut structure with an on-line monitoring device for the health state of a component.
Background
In the fields of equipment and industrial manufacturing, screw devices provided with anti-backlash nuts are widely used. The performance of eliminating gaps of the anti-gap nut directly influences the stability and the accuracy of the operation of the linear screw rod. In order to ensure that the anti-backlash nut assembly can function effectively on the lead screw for a long period of time, the anti-backlash nut assembly generally needs to undergo a great deal of testing and performance evaluation before the equipment is put into use. Through the document search of the prior art, no device suitable for on-line monitoring of the health state of the anti-backlash nut component exists at present, namely, a device for monitoring the health state of a torsion spring in the anti-backlash nut in real time in working. A spring tension and compression testing machine such as the design of a multifunctional nut tightening machine system of Shanghai university of transportation, the development of a torsion spring detection system of a virtual instrument of Hubei university of industry and the design of an optical group in Henan is matched with a torque wrench to use a device for monitoring torsion spring force, so that the torsion of a large torsion spring can be monitored, and most of the torsion spring can be obtained through a torque sensor, so that the online monitoring of the health state of a gap elimination nut assembly in a small space can not be met.
Disclosure of Invention
The invention aims to provide a gap eliminating nut structure with an on-line monitoring device for the health state of a component, so as to make up for the defects of the prior art.
The technical scheme of the invention is as follows:
The anti-backlash nut structure with the on-line monitoring device for the health state of the component comprises a shell, a front nut, a rear nut and a torsion spring, and is characterized by further comprising a torque adjusting sleeve, a pushing nut, an intermediate connecting block, a tension pressure sensor, an angle sensor and a limit card;
the shell is of a pipe sleeve structure with a flange disc in the middle, an inner spline arranged along the axial direction is arranged in a front and rear through pipe cavity, a front nut and a rear nut are respectively arranged in the pipe cavity through external splines matched with the front and rear nuts, the front and rear nuts are circumferentially fixed, a front convex step surface is arranged in the pipe cavity at a position close to the front end surface of the pipe cavity, and the front convex step surface is blocked in front of the front nut;
the rear part of the shell is provided with external threads, the push nut is arranged at the rear part of the shell through internal threads matched with the push nut, a screw hole of the push nut is provided with a rear convex step surface at a position close to the rear end surface of the push nut, and the push nut is blocked at the rear part of the rear nut;
The torque adjusting sleeve is of a cylindrical sleeve structure and sleeved on the shell, wherein the axis of the torque adjusting sleeve is concentric with the central axis of the shell, and the front end face of the torque adjusting sleeve abuts against the rear side face of the flange disc of the shell;
The pushing nut and the torsion spring are both arranged in the torque adjusting sleeve, the front part of the pushing nut is provided with a mounting groove which is open forwards, and the middle connecting block and the probe of the tension pressure sensor are embedded in the mounting groove; the torsion spring is sleeved on the shell and is positioned between the flange disc of the shell and the push nut, the front end torsion arm of the torsion spring is fixedly connected with the torque adjusting sleeve, the rear end torsion arm of the torsion spring is connected with the middle connecting block, the sensing surface of the tension pressure sensor is perpendicular to the spiral tangent line of the torsion spring passing through the starting point of the rear end torsion arm, and the middle connecting block is pressed on the sensing surface of the tension pressure sensor under the torsion action of the torsion spring;
the front end face of the pushing nut is provided with two buckles respectively positioned at the left side and the right side of the mounting groove, the limiting card is provided with two corresponding clamping holes, and the limiting card is buckled on the pushing nut through the clamping holes and is used for blocking the middle connecting block and the tension pressure sensor from separating from the opening of the mounting groove.
The angle sensor adopts a non-contact magnetic rotary encoder, the non-contact magnetic rotary encoder comprises a magnetic ring and a reading head, the magnetic ring is arranged outside the torque adjusting sleeve and is fixed on the rear end face of the pushing nut in a concentric and coaxial mode.
In addition to the above, a further improved or preferred embodiment further includes:
The middle connecting block is provided with a jack for installing the front end torsion arm, and the side surface of the middle connecting block is provided with a lubricant storage tank. The lubricant storage groove is used for storing lubricant, and reduces larger deviation of measurement caused by friction resistance in the measurement process.
Preferably, the two clamping holes of the limiting clamping piece are designed to be circular arc waist-shaped holes, so that the influence caused by machining errors and slight deformation of the limiting clamping piece is reduced, and the circle center of the circular arc falls on the central axis of the pushing nut.
Preferably, the tension pressure sensor adopts an LH-Y01-10 miniature force sensor.
Preferably, the magnetic rotary encoder adopts AksIM paraxial absolute magnetic rotary encoder and adopts MRA7 magnetic ring.
Further, the front side of the shell flange plate is provided with a mounting flange.
Preferably, the limit card is made of metal sheet
The beneficial effects are that:
the anti-backlash nut structure completes the layout and assembly of the monitoring device in a small space range of the nut through reasonable planning, comprises the monitoring of torsion force of the torsion spring and the monitoring of rotation angle, can meet the real-time on-line monitoring requirement on the health state of the anti-backlash nut assembly, has small structure volume, stable structure and stable operation, is easy to implement, produce and manufacture, and is suitable for popularization and use.
Drawings
FIG. 1 is a schematic axial cross-section of an anti-backlash nut structure in accordance with an embodiment;
FIG. 2 is a schematic radial cross-sectional view of an anti-backlash nut structure in accordance with an embodiment;
FIG. 3 is an exploded view of an anti-backlash nut arrangement in accordance with an exemplary embodiment;
FIG. 4 is a schematic view of the structure of the intermediate connection block in the embodiment;
fig. 5 is a schematic structural view of a push nut in an embodiment.
Detailed Description
In order to further clarify the principles of the present invention, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
The anti-backlash nut structure with the on-line monitoring device for the health state of the components shown in the figures 1 to 5 comprises a shell 1, two acme nuts 2, a mounting flange 3, a torque adjusting sleeve 4, a pushing nut 5, a torsion spring 6, an intermediate connecting block 7, a tension pressure sensor 8, an angle sensor, a limit card and other components. In this embodiment, two acme nuts 2 are disposed in front of and behind each other, which are called front nut and rear nut, respectively. The limiting card is a metal sheet 9 in the embodiment.
The shell 1 is a pipe sleeve structure with a flange disc in the middle (representing a certain position between the front end and the rear end of the shell, not particularly representing an absolute intermediate value), a front-back through pipe cavity is arranged in the pipe cavity of the shell 1, inner splines axially arranged are arranged in the pipe cavity of the shell, outer splines matched with key grooves of the front nut and the rear nut are arranged on the outer surfaces of the front nut and the rear nut, namely the front nut and the rear nut are installed in the pipe cavity of the shell 1 in a circumferential fixed mode through concave-convex embedded spline structures. The front convex step surface is arranged at the position close to the front end surface of the tube cavity of the shell 1 and is blocked in front of the front nut, so that the front nut is prevented from being separated from the tube cavity.
The rear part of the shell 1 is provided with external threads, the push nut 5 is provided with internal threads matched with the external threads, and when the push nut is installed, the push nut 5 is screwed on the shell 1. The screw hole of the push nut 5 is provided with a rear convex step surface at a position close to the rear end surface of the push nut, and the rear convex step surface is blocked at the rear of the rear nut to prevent the rear nut from being separated from the pipe cavity of the shell 1.
The torque adjusting sleeve 4 is of a cylindrical sleeve structure and sleeved on the shell 1, wherein the axis of the torque adjusting sleeve is concentric with the central axis of the shell 1, and the front end face of the torque adjusting sleeve 4 abuts against the rear side face of the flange disc of the shell 1, as shown in fig. 1.
The push nut 5 and the torsion spring 6 are arranged in the torque adjusting sleeve 4, a front part of the push nut 5 is provided with a mounting groove which is open forward, the mounting groove is composed of two parts of groove bodies which are respectively adaptive to the outline shape of the middle connecting block 7 and the pull pressure sensor 8, the middle connecting block 7 and the pull pressure sensor 8 are embedded in the mounting groove, and the sensing surface of the pull pressure sensor 8 is in contact with the middle connecting block 7. The torsion spring 6 is sleeved on the shell 1 and is positioned between the shell flange disc and the pushing nut 5, the front torsion arm of the torsion spring 6 is fastened on the front pipe wall of the torque adjusting sleeve 4, and the rear torsion arm of the torsion spring 6 is connected with the middle connecting block 7. As shown in fig. 4 and 5, the middle connecting block 7 is provided with a through jack, the rear end torsion arm of the torsion spring 6 extends into the jack and is limited and fixed in the middle connecting block 7, and the torsion force of the torsion spring 6 acts on the tension pressure sensor 8 through the transmission of the middle connecting block 7. The tension pressure sensor 8 is arranged at the side of the middle connecting block, the sensing surface of the tension pressure sensor is perpendicular to a spiral tangent line passing through the starting point of the torsion arm at the rear end of the torsion spring, and the torsion force of the torsion spring 6 is enabled to be maximally acted on the tension pressure sensor 8.
The side of the middle connecting block 7 is also provided with a circular arc-shaped lubricant storage groove for storing lubricating oil.
The front end face of the push nut 5 is also provided with a buckle at the left side and the right side of the mounting groove respectively. The metal sheet 9 is arc-shaped, and two corresponding clamping holes are formed in the corresponding clamping metal sheet. When in installation, the two clamping holes of the metal sheet 9 are respectively arranged on the corresponding clamping buckles, the length of the metal sheet spans the installation groove,
The middle connecting block 7 and the tension pressure sensor 8 in the mounting groove can be blocked, and the middle connecting block and the tension pressure sensor are prevented from being easily separated from the mounting groove. The two clamping holes of the metal sheet 9 are preferably designed to be circular arc waist-shaped holes so as to adapt to errors caused by bending of the metal sheet 9 and errors of machining precision. The circle center of the circular arc of the kidney-shaped hole falls on the central axis of the pushing nut 5.
Corresponding wire holes are further formed in the pushing nut 5 and the torque adjusting sleeve 4, and a cable of the tension pressure sensor 8 penetrates through the wire holes to extend to the outside of the anti-backlash nut structure and is connected with external monitoring equipment.
The angle sensor employs a non-contact magnetic rotary encoder comprising a magnetic ring 10 and a read head 12. The diameter of the magnetic ring 10 is larger than that of the torque adjusting sleeve 4, the magnetic ring is arranged outside the torque adjusting sleeve 4, is fixed on the rear end face of the push nut 5 in a concentric and coaxial mode through a plurality of bolts, rotates along with the push nut 5, and then fixes the reading head 12 relative to the magnetic ring 10 through the mounting seat 11. The reading head 12 is fixed on the mounting seat 11 through two M5 bolts and is matched with the position of the magnetic ring 10. The mounting seat 11 is fixed on an external mechanism other than the anti-backlash nut structure in the present embodiment.
In this embodiment, the tension pressure sensor 8 is preferably a LH-Y01-10 micro sensor, the probe outer diameter of which is 10 mm, the height of which is 6mm, the precision of which is 0.5%, and the measuring range of which is 0 to 50N, and is made of stainless steel. The magnetic rotary encoder preferably adopts AksIM paraxial absolute magnetic rotary encoder of MRA7 magnetic ring.
The mounting flange 3 is provided on the front side of the flange of the housing 1 for connection to external mechanisms.
The whole anti-backlash nut structure is arranged on the screw rod, and the motor drives the screw rod to rotate, so that the anti-backlash nut structure is driven to do linear motion along the screw rod. During operation, torsion of the torsion spring 6 indirectly acts on the induction zone of the tension pressure sensor 8 through the middle connecting block 7, and the health state of the torsion spring 6 can be obtained by reading out detection signals sent by the tension pressure sensor 8 through external monitoring equipment. When the torsion spring 6 rotates, the pushing nut 5 and the magnetic ring 10 are driven to rotate, and the reading head 12 sends the detection result to external monitoring equipment, so that the torsion condition of the torsion spring 6 can be obtained.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the foregoing embodiments, which have been described in the foregoing embodiments and description merely illustrates the principles of the invention, and various changes and modifications may be made therein without departing from the spirit and scope of the invention, the scope of which is defined in the appended claims, specification and their equivalents.
Claims (5)
1. The anti-backlash nut structure with the on-line monitoring device for the health state of the component comprises a shell (1), a front nut, a rear nut and a torsion spring (6), and is characterized by further comprising a torque adjusting sleeve (4), a pushing nut (5), an intermediate connecting block (7), a tension pressure sensor (8), an angle sensor and a limit card;
The shell (1) is of a pipe sleeve structure with a flange disc in the middle, an inner spline which is arranged along the axial direction is arranged in a front and rear through pipe cavity, a front nut and a rear nut are respectively arranged in the pipe cavity through external splines which are matched with the front nut and the rear nut, the front nut and the rear nut are circumferentially fixed, and a front convex step surface is arranged at a position, close to the front end surface of the pipe cavity, of the pipe cavity and is blocked in front of the front nut;
the rear part of the shell (1) is provided with external threads, the push nut (5) is arranged at the rear part of the shell (1) through internal threads matched with the external threads, a screw hole of the push nut (5) is provided with a rear convex step surface at a position close to the rear end surface of the push nut, and the push nut is blocked at the rear part of the rear nut;
The torque adjusting sleeve (4) is of a cylindrical sleeve structure and sleeved on the shell (1), wherein the axis is concentric with the central axis of the shell (1), and the front end surface of the torque adjusting sleeve (4) abuts against the rear side surface of the flange disc of the shell (1);
The pushing nut (5) and the torsion spring (6) are arranged in the torque adjusting sleeve (4), the front part of the pushing nut (5) is provided with a mounting groove which is open forward, and the middle connecting block (7) and the tension pressure sensor (8) are embedded in the mounting groove; the torsion spring (6) is sleeved on the shell (1), is positioned between the flange disc of the shell and the pushing nut (5), the front end torsion arm of the torsion spring (6) is fixedly connected with the torque adjusting sleeve (4), the rear end torsion arm of the torsion spring (6) is connected with the middle connecting block (7), the induction surface of the tension pressure sensor (8) is perpendicular to the spiral tangent line of the torsion spring passing through the starting point of the rear end torsion arm, and the middle connecting block (7) is pressed on the induction surface of the tension pressure sensor (8) under the action of torsion force of the torsion spring;
The front end face of the pushing nut (5) is provided with two buckles respectively positioned at the left side and the right side of the mounting groove, the limiting card is provided with two corresponding clamping holes, and the limiting card is buckled on the pushing nut (5) through the clamping holes and is used for blocking the middle connecting block (7) and the tension pressure sensor (8) from separating from the opening of the mounting groove;
The angle sensor adopts a non-contact magnetic rotary encoder, the non-contact magnetic rotary encoder comprises a magnetic ring (10) and a reading head (12), the magnetic ring (10) is arranged outside the torque adjusting sleeve (4) and is fixed on the rear end face of the pushing nut (5) in a concentric and coaxial mode;
the middle connecting block (7) is provided with a jack for installing the front-end torsion arm, and the side surface of the middle connecting block (7) is provided with a lubricant storage tank;
the two clamping holes of the limiting clamping piece are circular arc waist-shaped holes, and the circle center of the circular arc falls on the central axis of the pushing nut (5).
2. The anti-backlash nut structure with the on-line monitoring device for the health status of the components according to claim 1, wherein the tension pressure sensor (8) is an LH-Y01-10 miniature force sensor.
3. The anti-backlash nut structure with the on-line monitoring device for the health status of the components according to claim 1, wherein the magnetic rotary encoder is AksIM paraxial absolute magnetic rotary encoder and adopts an MRA7 magnetic ring.
4. The anti-backlash nut structure with the on-line monitoring device for the health status of the components according to claim 1, characterized in that the front side of the flange plate of the shell (1) is provided with a mounting flange (3).
5. The anti-backlash nut structure with the on-line monitoring device for the health status of the components according to claim 1, wherein the limiting card is a metal sheet (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910567264.8A CN110145580B (en) | 2019-06-27 | 2019-06-27 | Anti-backlash nut structure with component health status on-line monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910567264.8A CN110145580B (en) | 2019-06-27 | 2019-06-27 | Anti-backlash nut structure with component health status on-line monitoring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110145580A CN110145580A (en) | 2019-08-20 |
| CN110145580B true CN110145580B (en) | 2024-05-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910567264.8A Active CN110145580B (en) | 2019-06-27 | 2019-06-27 | Anti-backlash nut structure with component health status on-line monitoring device |
Country Status (1)
| Country | Link |
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| CN (1) | CN110145580B (en) |
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| US4954032A (en) * | 1989-11-13 | 1990-09-04 | Windfred M. Berg, Inc. | Anti-backlash nut |
| JPH09145502A (en) * | 1995-11-21 | 1997-06-06 | Honda Motor Co Ltd | Torque detector/controller for automatic transmission |
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