CN210128049U - Anti-backlash nut structure with component health state online monitoring device - Google Patents
Anti-backlash nut structure with component health state online monitoring device Download PDFInfo
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- CN210128049U CN210128049U CN201920982884.3U CN201920982884U CN210128049U CN 210128049 U CN210128049 U CN 210128049U CN 201920982884 U CN201920982884 U CN 201920982884U CN 210128049 U CN210128049 U CN 210128049U
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- 238000012806 monitoring device Methods 0.000 title claims abstract description 15
- 230000036541 health Effects 0.000 title claims description 15
- 230000003862 health status Effects 0.000 claims abstract 4
- 239000002184 metal Substances 0.000 claims description 9
- 239000000314 lubricant Substances 0.000 claims description 5
- 238000003860 storage Methods 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 2
- 230000000903 blocking effect Effects 0.000 claims description 2
- 230000008030 elimination Effects 0.000 claims 1
- 238000003379 elimination reaction Methods 0.000 claims 1
- 230000000149 penetrating effect Effects 0.000 claims 1
- 238000012544 monitoring process Methods 0.000 abstract description 13
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000009434 installation Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 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
- 230000006978 adaptation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 210000005056 cell body Anatomy 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
- 238000010586 diagram Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 239000000463 material 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
- 230000004044 response Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
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Abstract
The utility model discloses a crack nut structure disappears with subassembly health status on-line monitoring device, including casing, preceding nut, back nut and torsional spring, its characterized in that still is equipped with the torque adjustment cover, promotes nut, intermediate junction piece, draws pressure sensor, angle sensor and spacing card. The utility model discloses the overall arrangement and the equipment to monitoring structure have been accomplished through reasonable planning in little space range to the crack nut structure that disappears, include to torsional spring torsion's monitoring and rotation angle's monitoring, realized the on-line monitoring to crack nut health status, just the utility model discloses the crack nut structure that disappears is small, and the structure is firm, and the operation is stable, and easy to carry out and manufacturing are fit for using widely.
Description
Technical Field
The invention relates to the technical field of automation, in particular to an anti-backlash nut structure with an online monitoring device for the health state of a component.
Background
In the field of instruments and industrial manufacturing, screw devices provided with anti-backlash nuts are widely used. The performance of eliminating the clearance of the clearance eliminating 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 effectively function on the lead screw for a long time, the anti-backlash nut assembly generally needs to be subjected to a large number of tests and performance evaluations before the equipment is put into use. The document retrieval of the prior art shows that no online health state monitoring device suitable for the anti-backlash nut assembly exists at present, namely a device for monitoring the health state of the torsion spring in the anti-backlash nut in real time during work. The device for monitoring the torsional spring force is matched with a spring tension compression testing machine and a torque wrench, which is designed by optical groups in Henan, can only monitor the torque of a large torsional spring, is mostly obtained through a torque sensor, and is far from meeting the online monitoring of the health state of the anti-backlash nut assembly in a small space.
Disclosure of Invention
The invention aims to provide an anti-backlash nut structure with an online 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:
a clearance eliminating nut structure with an online monitoring device for the health state of a 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 pulling pressure sensor, an angle sensor and a limiting 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 pipe cavity which is penetrated through from front to back, the front nut and the rear nut are respectively arranged in the pipe cavity through an outer spline matched with the front nut and are fixed in the circumferential direction, and a front convex step surface is arranged at the position of the pipe cavity close to the front end surface of the pipe cavity and is blocked in front of the front nut;
the rear part of the shell is provided with an external thread, the push nut is arranged at the rear part of the shell through the internal thread matched with the push nut, and a rear convex step surface is arranged at the position, close to the rear end surface, of a screw hole of the push nut and is blocked behind the rear nut;
the torque adjusting sleeve is of a cylindrical pipe sleeve structure and is sleeved on the shell, the central 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 shell flange disc;
the pushing nut and the torsion spring are arranged in the torque adjusting sleeve, the front part of the pushing nut is provided with a mounting groove with a forward opening, and the middle connecting block and the probe of the tension and pressure sensor are embedded in the mounting groove; the torsion spring is sleeved on the shell and positioned between the flange disc of the shell and the pushing nut, a torsion arm at the front end of the torsion spring is fixedly connected with the torque adjusting sleeve, a torsion arm at the rear end of the torsion spring is connected with the middle connecting block, the sensing surface of the tension and pressure sensor is vertical to a spiral tangent line of the torsion spring passing through the starting point of the torsion arm at the rear end, and the middle connecting block is pressed on the sensing surface of the tension and pressure sensor under the torsion action of the torsion force of the torsion spring;
two buckles respectively located on the left side and the right side of the mounting groove are arranged on the front end face of the push nut, two corresponding clamping holes are formed in the limiting clamping piece, and the limiting clamping piece is buckled on the push nut through the clamping holes and used for blocking the middle connecting block and enabling the pull pressure sensor to be separated 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, and the magnetic ring is arranged outside the torque adjusting sleeve and fixed on the rear end face of the pushing nut in a concentric and coaxial mode.
On the basis of the above scheme, a further improved or preferred scheme further comprises:
the middle connecting block is provided with a jack for installing a front end torque arm, and the side surface of the middle connecting block is provided with a lubricant storage tank. The lubricant storage tank is used for storing lubricant, and large deviation of measurement caused by friction resistance in the measurement process is reduced.
Preferably, the two clamping holes of the limiting clamping piece are designed into arc-shaped waist-shaped holes so as to reduce machining errors and influence caused by slight deformation of the limiting clamping piece, and the circle center of the arc shape falls on the central axis of the pushing nut.
Preferably, the pull pressure sensor adopts an LH-Y01-10 miniature force sensor.
Preferably, the magnetic rotary encoder adopts an AksIM paraxial absolute type magnetic rotary encoder and adopts an MRA7 magnetic ring.
Furthermore, a mounting flange is arranged on the front side of the shell flange disc.
Preferably, the limit card is made of metal sheets
Has the advantages 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 of the torsion spring and the monitoring of a rotating angle, can meet the real-time on-line monitoring requirement on the health state of an anti-backlash nut assembly, and is small in structure, stable in operation, easy to implement, produce and manufacture and suitable for popularization and use.
Drawings
FIG. 1 is a schematic axial cross-sectional view of an anti-backlash nut configuration in an exemplary embodiment;
FIG. 2 is a schematic radial cross-sectional view of an anti-backlash nut configuration in an exemplary embodiment;
FIG. 3 is an exploded view of the anti-backlash nut configuration of an exemplary embodiment;
FIG. 4 is a schematic structural view of an intermediate connecting block in an embodiment;
FIG. 5 is a schematic diagram of a push nut in an exemplary embodiment;
Detailed Description
To further clarify the operation 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 online 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, a middle connecting block 7, a pulling pressure sensor 8, an angle sensor, a limiting card and other components. In this embodiment, the two acme nuts 2 are distributed front and back, and are respectively called front nuts and back nuts. The limiting card in this embodiment is a metal sheet 9.
The shell 1 is a pipe sleeve structure with a flange plate arranged in the middle (representing a certain position between the front end and the rear end of the shell, and not particularly referring to an absolute intermediate value), the pipe sleeve structure is provided with a pipe cavity which is through from front to rear, an internal spline which is arranged along the axial direction is arranged in the pipe cavity of the shell 1, external splines which are matched with key grooves of the internal spline are arranged on the outer surfaces of the front nut and the rear nut, and the front nut and the rear nut are arranged in the pipe cavity of the shell 1 in a circumferential fixing mode through a spline structure which is. The pipe cavity of the shell 1 is provided with a front convex surface at a position close to the front end surface of the pipe cavity, and the front convex surface is blocked in front of the front nut to prevent the front nut from being separated from the pipe cavity.
The rear portion of casing 1 is equipped with the external screw thread, and push nut 5 is equipped with the internal thread of adaptation with it, and during the installation, push nut 5 revolves soon and twists on casing 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 thereof, and the rear convex step surface is blocked behind the rear nut to prevent the rear nut from being separated from the tube cavity of the shell 1.
The torque adjusting sleeve 4 is of a cylindrical pipe sleeve structure, is sleeved on the shell 1, and has a central axis concentric with that 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.
Promote nut 5, torsional spring 6 and all set up in the torque adjustment cover 4, the front portion that promotes nut 5 is equipped with open-ended mounting groove forward, and the mounting groove comprises with intermediate junction piece 7, the two parts cell body that draws 8 profile shapes of pressure sensor to adapt to respectively, intermediate junction piece 7 with draw pressure sensor 8 to inlay in the mounting groove, draw 8 response faces of pressure sensor and 7 contacts of intermediate junction piece. The torsion spring 6 is sleeved on the shell 1 and located between the shell flange disc and the pushing nut 5, a front end torsion arm of the torsion spring 6 is firmly buckled on the front pipe wall of the torque adjusting sleeve 4, and a rear end torsion arm of the torsion spring 6 is connected with the middle connecting block 7. As shown in fig. 4 and 5, the middle connection block 7 is provided with a front and rear through insertion hole, the rear end torque arm of the torsion spring 6 extends into the insertion hole and is fixed in the middle connection block 7 in a limited manner, and the torsion force of the torsion spring 6 acts on the tension and pressure sensor 8 through the transmission of the middle connection block 7. The tension pressure sensor 8 is arranged at the side of the middle connecting block, and the sensing surface of the tension pressure sensor is perpendicular to the spiral tangent line passing through the starting point of the torsion arm at the rear end of the torsion spring, so that the torsion of the torsion spring 6 is maximized to act on the tension pressure sensor 8.
And the side surface of the middle connecting block 7 is also provided with a circular arc lubricant storage tank for storing lubricating oil.
The left side and the right side of the mounting groove are respectively provided with a buckle on the front end face of the push nut 5. The metal sheet 9 is arc-shaped, and two corresponding clamping holes are formed in the metal sheet corresponding to the clamping buckles. When in installation, the two clamping holes of the metal sheet 9 are respectively arranged on the corresponding buckles, the length of the metal sheet spans the installation groove,
the middle connecting block 7 and the pull pressure sensor 8 in the mounting groove can be blocked, and the middle connecting block and the pull 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-shaped kidney-shaped holes so as to adapt to errors caused when the metal sheet 9 is bent and errors of machining precision. The circle center of the arc of the waist-shaped hole is positioned on the central axis of the push nut 5.
And the push nut 5 and the torque adjusting sleeve 4 are also provided with corresponding wire holes, and a cable for pulling the pressure sensor 8 passes through the wire holes, extends to the outside of the anti-backlash nut structure and is connected with external monitoring equipment.
The angle sensor adopts a non-contact magnetic rotary encoder, and the non-contact magnetic rotary encoder comprises a magnetic ring 10 and a reading 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, the magnetic ring is fixed on the rear end face of the pushing nut 5 in a concentric and coaxial mode through a plurality of bolts, the magnetic ring rotates along with the pushing nut 5, and then the reading head 12 is fixed relative to the magnetic ring 10 through the mounting seat 11. The reading head 12 is fixed on the mounting base 11 through two M5 bolts and is matched with the magnetic ring 10 in position. The mounting seat 11 is fixed on an external mechanism except the anti-backlash nut structure in the embodiment.
In the embodiment, the pull pressure sensor 8 preferably adopts an LH-Y01-10 miniature force sensor, the probe of the LH-Y01-10 miniature force sensor has the advantages of 10 mm of outer diameter, 6mm of height, 0.5% of precision and 0-50N of measuring range, and is made of stainless steel materials. The magnetic rotary encoder is preferably an AksIM paraxial absolute type magnetic rotary encoder adopting an MRA7 magnetic ring.
The mounting flange 3 is arranged on the front side of the flange disc of the shell 1 and used for connecting an external mechanism.
The whole gap eliminating nut structure is arranged on the screw rod, and the motor drives the screw rod to rotate, so that the gap eliminating nut structure is driven to do linear motion along the screw rod. When the torsion-type tension and pressure sensor works, the torsion of the torsion spring 6 indirectly acts on the sensing area of the tension and pressure sensor 8 through the middle connecting block 7, and the health state of the torsion spring 6 can be obtained by reading a detection signal sent by the tension and pressure sensor 8 through external monitoring equipment. When the torsion spring 6 rotates, the push nut 5 and the magnetic ring 10 are driven to rotate, the reading head 12 sends a detection result to external monitoring equipment, and the torsion condition of the torsion spring 6 can be obtained.
The foregoing shows and describes the general principles, essential 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 embodiments described above, which are described in the foregoing description only for the purpose of illustrating the principles of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims, specification, and equivalents thereof.
Claims (7)
1. A clearance elimination nut structure with an online monitoring device for the health state of a 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 pulling pressure sensor (8), an angle sensor and a limiting card;
the shell (1) 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 pipe cavity penetrating through the front and the back of the shell, a front nut and a back nut are respectively installed in the pipe cavity through an outer spline matched with the front nut and are fixed in the circumferential direction, and a front convex step surface is arranged at the 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 an external thread, the push nut (5) is arranged at the rear part of the shell (1) through an internal thread matched with the push nut, and 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 screw hole and is blocked behind the rear nut;
the torque adjusting sleeve (4) is of a cylindrical pipe sleeve structure and is sleeved on the shell (1), the central 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);
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 with a forward opening, and the middle connecting block (7) and the pull pressure sensor (8) are embedded in the mounting groove; the torsion spring (6) is sleeved on the shell (1) and positioned between the shell flange disc and the pushing nut (5), a front-end torque arm of the torsion spring (6) is fixedly connected with the torque adjusting sleeve (4), a rear-end torque arm of the torsion spring (6) is connected with the intermediate connecting block (7), the sensing surface of the tension and pressure sensor (8) is perpendicular to a torsion spring spiral tangent line passing through the starting point of the rear-end torque arm, and the intermediate connecting block (7) presses the sensing surface of the tension and pressure sensor (8) under the action of torsion of the torsion spring;
the front end face of the push 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 push nut (5) through the clamping holes and used for blocking the middle connecting block (7) and the pull pressure sensor (8) from being separated 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), and the magnetic ring (10) is arranged outside the torque adjusting sleeve (4) and fixed on the rear end face of the push nut (5) in a concentric and coaxial mode.
2. The structure of the anti-backlash nut with the online monitoring device for the health status of the assembly as claimed in claim 1, wherein the middle connecting block (7) is provided with a jack for installing a front torsion arm, and the side surface of the middle connecting block (7) is provided with a lubricant storage groove.
3. The anti-backlash nut structure with the online component health state monitoring device according to claim 1, wherein the two clamping holes of the limiting clamping piece are circular arc-shaped waist-shaped holes, and the center of the circular arc is located on the central axis of the pushing nut (5).
4. The anti-backlash nut structure with the online component health monitoring device according to claim 1, 2 or 3, wherein the pull-pressure sensor (8) is an LH-Y01-10 micro force sensor.
5. The structure of claim 1, 2 or 3, wherein the magnetic rotary encoder is an AksIM paraxial absolute magnetic rotary encoder, and MRA7 magnetic ring is used.
6. An anti-backlash nut structure with an online component health status monitoring device according to claim 1, 2 or 3, wherein the front side of the flange disc of the shell (1) is provided with a mounting flange (3).
7. The anti-backlash nut structure with the online component health monitoring device according to claim 1, 2 or 3, wherein the limiting card is a metal sheet (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920982884.3U CN210128049U (en) | 2019-06-27 | 2019-06-27 | Anti-backlash nut structure with component health state online monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920982884.3U CN210128049U (en) | 2019-06-27 | 2019-06-27 | Anti-backlash nut structure with component health state online monitoring device |
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| Publication Number | Publication Date |
|---|---|
| CN210128049U true CN210128049U (en) | 2020-03-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920982884.3U Expired - Fee Related CN210128049U (en) | 2019-06-27 | 2019-06-27 | Anti-backlash nut structure with component health state online monitoring device |
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| CN (1) | CN210128049U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110145580A (en) * | 2019-06-27 | 2019-08-20 | 南京工程学院 | A kind of gap nut structure that disappears with component health status on-Line Monitor Device |
-
2019
- 2019-06-27 CN CN201920982884.3U patent/CN210128049U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110145580A (en) * | 2019-06-27 | 2019-08-20 | 南京工程学院 | A kind of gap nut structure that disappears with component health status on-Line Monitor Device |
| CN110145580B (en) * | 2019-06-27 | 2024-05-10 | 南京工程学院 | Anti-backlash nut structure with component health status on-line monitoring device |
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Granted publication date: 20200306 |