CN112129440A - Bob torque sensor - Google Patents
Bob torque sensor Download PDFInfo
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- CN112129440A CN112129440A CN202010998386.5A CN202010998386A CN112129440A CN 112129440 A CN112129440 A CN 112129440A CN 202010998386 A CN202010998386 A CN 202010998386A CN 112129440 A CN112129440 A CN 112129440A
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- torque
- torque sensor
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- sleeve
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
- G01L3/02—Rotary-transmission dynamometers
- G01L3/04—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft
- G01L3/10—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating
- G01L3/101—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving magnetic or electromagnetic means
- G01L3/105—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving magnetic or electromagnetic means involving inductive means
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- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention relates to a Tourbillon torque sensor, comprising: the torque sensor comprises a torque sensor shell assembly, a torque shaft body assembly, a cantilever beam group force measurement assembly and a base assembly; the torque shaft body assembly transforms a torque angle psi into a small axial displacement change quantity delta L of the force transmission sleeve through a thrust sleeve fastened on the torque shaft (1) and the force transmission sleeve axially sliding on the torque shaft (1), and further acts on a cantilever sheet beam of the cantilever beam group force measurement assembly through the axial displacement change quantity delta L of the force transmission sleeve, so that the real-time output of the torque is realized. The torque sensor is based on the strain gauge torsion measuring principle technology, adopts the technical scheme of a new concept of 'no strain gauge adhered to a torque shaft', and meets the pain point requirements of small size, high rotating speed and long service life of the torque sensor.
Description
Technical Field
The present invention relates to a sensor; specifically, the sensor is a Coriolis torque sensor with a brand-new technical scheme; belongs to the technical field of modern sensors.
Technical Field
Prior art torque sensor products are typically: the torque sensor comprises three categories of a phase difference type torque sensor, a slip ring type torque sensor and an electromagnetic coil type torque sensor.
The phase difference type torque sensor in the prior art is gradually eliminated due to the fact that the phase difference type torque sensor is heavy in size and poor in torque measurement accuracy of a low-speed area and a high-speed area.
In the prior art, the sliding ring type torque sensor is easy to cause heating and abrasion of a conducting ring component due to the dynamic friction of the conducting ring; particularly, when the rotating speed of a domestic slip ring type torque sensor exceeds 3000 revolutions per minute, the service life of the sensor is difficult to maintain for about one year; but the low volume profile is its greatest market advantage.
The electromagnetic coil type torque sensor in the prior art adopts an open-loop magnetic circuit structure to replace a conducting ring component, but the magnetic resistance of magnetic flux between air gap interface layers is increased, so that the electric energy conversion efficiency of the electric energy of the main coil coupled to the electric energy of the secondary coil is low. Further: technical defects that electromagnetic radiation is easy to generate and electromagnetic interference of an external space is easy to occur due to the fact that a magnetic circuit is not closed, the reactance Z value of an electromagnetic wire coil is large, the frequency response speed is low, real-time measurement of high-speed torque is difficult to achieve, and the volume appearance of the sensor is many times larger than that of a slip-ring type torque sensor.
Because slip ring type torque sensor and electromagnetic coil type torque sensor all adopt the principle of foil gage pasting on the torque detection axle to survey and turn round the technology: therefore, the technical pain point of [ static and dynamic electric energy coupling ] can not be avoided.
Aiming at the technical pain points existing on the torque sensor product (static and dynamic electric energy coupling), the invention provides a brand-new technical scheme (without static and dynamic electric energy coupling); the torque measuring torsion shaft of the brand-new technical scheme is not adhered with a strain gauge.
Disclosure of Invention
The invention is in the modern sensor industry. Firstly, a strain gauge principle based technology (without static and dynamic electric energy coupling) is provided, and a mechanical principle that a torsion angle psi is converted into an axial linear displacement delta L is adopted; a cantilever beam of a static object acts through linear displacement delta L, and the technical scheme of the brand-new torque sensor is provided.
The present invention is characterized by comprising: the torque sensor comprises a torque sensor shell assembly, a torque shaft assembly, a cantilever beam group force measurement assembly and a base assembly; the torque sensor shell assembly consists of a left end cover (3) internally provided with a bearing (2), a rectangular sleeve body (8), a sealing element (14), a cantilever beam piece (17) and a right end cover (10) internally provided with the bearing (2);
the torque axis body component consists of a torque axis (1), a thrust sleeve (5), a force transmission sleeve (7) and a shaft diameter phiψThe diameter steel ball (6), the hardness block (9) and the lining piece (11);
the cantilever beam group force measuring assembly consists of a cantilever beam piece (17) and a strain gauge (18);
the base assembly is composed of a base member (15), a circuit processing module (12) and an aviation socket (13).
The design concept of the invention is novel and unique, and breaks through the design concept of the existing torque sensor based on the strain gauge adhered on the torque shaft; the problem that the existing torque sensor based on the strain gauge technology adopts static and dynamic electric energy coupling to bring pain points at low speed or large volume is solved; the technical problems that the small size cannot realize high rotating speed and the small size cannot realize long service life are solved.
The technical scheme of the invention has substantial technical characteristics that: the torsion shaft measuring component of the Coriolis torque sensor is not adhered with a strain gauge and does not need to provide any electric energy for the torsion shaft.
The technical scheme of the invention has obvious technical progress that: the strain gauge of the Coriolis torque sensor is adhered to a cantilever beam of a static object; the technical breakthroughs of high rotating speed, quick response, long service life and small volume are realized:
drawings
Fig. 1 is a schematic view of the general structure of the present invention.
FIG. 2 is a schematic view of a strain gauge of the present invention adhered to a static carrier.
FIG. 3 is a schematic view of the coupling between the thrust sleeve and the force-transmitting sleeve of the present invention mounted on the torque shaft.
Detailed Description
The invention will be further elucidated with reference to an embodiment shown in the drawing.
Fig. 1 is a schematic diagram of an overall structure provided in this embodiment, in which the nephelometric torque sensor is composed of four parts, namely a sensor housing assembly, a torque shaft assembly, a deformation force measuring assembly and a base assembly;
wherein the sensor housing assembly of fig. 1 enables the carrying of the torque rotation shaft and the base;
the torque shaft body assembly in the figure 1 realizes the conversion of the functional relation between the axial displacement quantity delta L of the force transmission sleeve and the torsion angle psi;
the base assembly of fig. 1 incorporates a circuit processing module (12) for logic processing of the power and torque signals of the strain gauge bridge and for output via the aviation socket (13) interface.
FIG. 2 is a schematic view illustrating the strain gauge of the present embodiment adhered to a static carrier.
The torque detection of the Coriolis torque sensor is realized by that a thrust sleeve (5) fixedly arranged on a torque shaft (1) is opposite to a force transmission sleeve (7) which can only move axially on the torque shaft (1), and a displacement variable quantity delta L of the force transmission sleeve generated under the action of a torsion angle psi generated under the action of couple torsion pushes a deformation force measuring component, so that a bridge assembly strain gage adhered to a cantilever beam piece (17) outputs electric parameter change information.
Fig. 3 is a schematic diagram of a coupling structure of a thrust sleeve (5) and a force transmission sleeve (7) mounted on a torque shaft (1) according to the embodiment;
wherein, one end of the thrust sleeve (5) described in figure 3 is firmly locked with the torque shaft (1) in a coaxial pin mode, and the plane of the other end of the thrust sleeve (5) is provided with four wedge-shaped grooves which are uniformly distributed at an angle of 90 degrees;
wherein the force transmission sleeve (7) described in figure 3 is constrained on the torque shaft (1) in an axial sliding way, and the plane of the other end of the force transmission sleeve (7) is provided with four wedge-shaped grooves which are uniformly distributed at an angle of 90 degrees and matched with the thrust sleeve (5);
the small parts of the force transmission sleeve are completed by pressing the hardness block (9) into the circular diameter of the force transmission sleeve (7) in a transition fit manner;
the thrust sleeve (5) and the small parts of the force transmission sleeve are positioned on the torque shaft (1), the wedge groove alignment is taken as a reference, 4 phi 3 steel balls are placed in the wedge groove group, and then the thrust sleeve (5) is fixedly fixed on the torque shaft (1) in a pin mode, so that the torque angle psi is converted into the torque shaft body component with the small part axial displacement variable quantity delta L of the force transmission sleeve;
the left end cover component with the bearing (2) arranged inside is positioned on the rectangular sleeve body (8) through a pin, and is locked by a screw to complete a semi-finished product of the left shell of the torque sensor;
the cantilever beam component (17) is ground and polished, and strain gauges and a bridge assembly lead are adhered to two beams close to a pin column positioning hole, so that the conversion output of mechanical deformation electrical parameters is realized;
the torque shaft body assembly is pressed into a semi-finished product of a left shell of the torque sensor in a tooling mode, a sealing element (14) is arranged in the semi-finished product, and then lubricating grease is injected through 4 phi 3 diameter through holes on the sealing element (14) until the sealing element is full and does not overflow, so that the semi-finished product torque sensor with the technical characteristics that 8 phi 3 diameter steel balls arranged in the torque sensor run stably, flexibly and never rust is realized;
4 steel balls with the diameter phi of 3 are put on an inner sealing element (14) of the semi-finished product torque sensor, a cantilever beam force measuring component is further arranged on a positioning shaft pin of a rectangular sleeve body (8), an outer lead of a bridge strain gauge is arranged, a lining component (11) is further pressed into the other end of the torque shaft body component, which is not provided with an end cover, and finally, a right end cover component pin with a built-in bearing (2) is installed on the semi-finished product torque sensor in a positioning mode, so that the calibratable prototype torque sensor is realized.
A particular class of Coriolis torque sensors is realized by mounting a set of components, a base member (15) housing a circuit processing module (12) and an exterior aircraft socket (13), on a calibratable prototype torque sensor.
Finally, the description is as follows: the above embodiments are only intended to illustrate the technical solution of the present invention, not to limit the scope of the invention, and those skilled in the art can make modifications or amendments to the present invention after understanding the teaching of the present invention, and the equivalent modifications are also within the scope defined by the claims of the present application.
Claims (9)
1. A cobber torque sensor, comprising: the torque sensor comprises a torque sensor shell assembly, a torque shaft body assembly, a cantilever beam group force measurement assembly and a base assembly; the torque sensor shell assembly consists of a left end cover (3) internally provided with a bearing (2), a rectangular sleeve body (8), a sealing element (14), a stressed deformation beam piece (17) and a right end cover (10) internally provided with the bearing (2);
the torque axis body component consists of a torque axis (1), a thrust sleeve (5), a force transmission sleeve (7) and a diameter phiψThe diameter steel ball (6), the hard block (9) and the lining piece (11);
the deformation body force measuring assembly consists of a cantilever beam piece (17) and a strain gauge (18);
the base assembly is composed of a base member (15), a circuit processing module (12) and an aviation socket (13).
By pushing throughThe force sleeve (5) and small parts of the force transmission sleeve are positioned on the torque shaft (1), and 4 particles of phi are placed in the wedge groove group pair by taking the alignment of the wedge grooves as a referenceψAfter steel balls are placed, the thrust sleeve (5) is fixedly fixed on the torque shaft (1) in a pin mode, and a torque shaft body assembly for converting a torque angle psi into a small component axial displacement variable delta L of the force transmission sleeve is realized;
the cantilever beam component (17) is ground and polished, and strain gauges and a bridge assembly lead are adhered to two beams close to a pin column positioning hole, so that the conversion output of mechanical deformation electrical parameters is realized;
the torque shaft body assembly is pressed into the semi-finished product of the left shell of the torque sensor in a tooling mode, the sealing element (14) is further installed in the semi-finished product, and then 4 phi are arranged on the sealing element (14)ψThe diameter through hole is filled with lubricating grease until the through hole is full and does not overflow, so that the through hole is arranged in the torque sensor for 8 phiψThe steel balls with the diameters are stable and flexible in running and never rust;
4 particles of phi are put into a through hole on a semi-finished product torque sensor sealing piece (14)ψThe diameter steel ball further settles the cantilever beam dynamometry subassembly on the location epaxial pin of rectangular cover body (8), arranges the lead wire of group bridge foil gage in order, and then further impresses bushing spare (11) torque axis body subassembly not dress axis body one end of end cover, installs the right-hand member lid pin nail location of built-in bearing (2) on semi-manufactured goods torque sensor at last, realizes the rudiment torque sensor that can mark.
A particular class of Coriolis torque sensors is realized by mounting a set of components, a base member (15) housing a circuit processing module (12) and an exterior aircraft socket (13), on a calibratable prototype torque sensor.
2. A cobber torque sensor according to claim 1, wherein the seal is either a fluorocarbon composite or F4The material is prepared.
3. The Neeberg torque transducer according to claim 1, wherein the thrust sleeve (5) is made of a strong rigid material, and the end plane has wedge-shaped grooves uniformly distributed at an angle of 90 ° and preventing steel balls phiψThe step edge falls inwards.
4. The Neeberg torque transducer according to claim 1, characterized in that the force-transmitting sleeve (7) is made of a strong rigid material, and the end plane is provided with wedge-shaped grooves uniformly distributed at an angle of 90 ° and preventing steel balls phiψThe step edge of going out.
5. The Tourbillon torque transducer according to claim 1, characterized in that one end face of the hardness block (9) is provided with an axial steel ball phiψDeep spherical groove with depth not more than phiψ/3，φψHas a diameter of 3-5 mm.
6. A Dourber torque transducer according to claim 1, characterised in that the inner ledge thickness edge surface of the cantilever member (17) has 4 radially extending balls φψA spherical deep groove with a depth not more than phiψ/3。
7. Matching wedge-shaped grooves in the end planes of the thrust sleeve (5) and the force-transmitting sleeve (7) according to claims 3-4, characterised in that the angle range of the wedge-shaped groove is set in the interval 60-130 °. The depth of the wedge-shaped groove is less than or equal to phiψ/3。
8. The babbitt torque transducer according to claim 1, wherein the partial space of the housing in which the complete torque transducer is assembled is filled with grease.
9. A cobber torque sensor according to claim 1, wherein 4 90 ° equispaced beam arms of the cantilever beam member (17) are of a large-lug-type sheet structure with a centripetal extending head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010998386.5A CN112129440B (en) | 2020-09-22 | 2020-09-22 | Bob torque sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010998386.5A CN112129440B (en) | 2020-09-22 | 2020-09-22 | Bob torque sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112129440A true CN112129440A (en) | 2020-12-25 |
| CN112129440B CN112129440B (en) | 2022-04-29 |
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ID=73841932
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010998386.5A Active CN112129440B (en) | 2020-09-22 | 2020-09-22 | Bob torque sensor |
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| Country | Link |
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| CN (1) | CN112129440B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102021119364A1 (en) | 2021-07-27 | 2023-02-02 | Minebea Mitsumi Inc. | Measuring device, drive device with the measuring device and two-wheeler with the measuring device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2222346Y (en) * | 1994-07-11 | 1996-03-13 | 江西省交通科学技术研究所 | Sensor for testing output axle torque of power machinery |
| CN1752725A (en) * | 2005-11-15 | 2006-03-29 | 北方工业大学 | Clamp ring torque sensor |
| CN202748182U (en) * | 2012-06-13 | 2013-02-20 | 内蒙古科技大学 | Torque-measuring apparatus |
| CN104019929A (en) * | 2014-06-11 | 2014-09-03 | 中国船舶重工集团公司第七0四研究所 | Online rotating shaft torque measurement method based on relative displacement measurement of eddy current |
| WO2020031540A1 (en) * | 2018-08-10 | 2020-02-13 | アルプスアルパイン株式会社 | Torque sensor |
-
2020
- 2020-09-22 CN CN202010998386.5A patent/CN112129440B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2222346Y (en) * | 1994-07-11 | 1996-03-13 | 江西省交通科学技术研究所 | Sensor for testing output axle torque of power machinery |
| CN1752725A (en) * | 2005-11-15 | 2006-03-29 | 北方工业大学 | Clamp ring torque sensor |
| CN202748182U (en) * | 2012-06-13 | 2013-02-20 | 内蒙古科技大学 | Torque-measuring apparatus |
| CN104019929A (en) * | 2014-06-11 | 2014-09-03 | 中国船舶重工集团公司第七0四研究所 | Online rotating shaft torque measurement method based on relative displacement measurement of eddy current |
| WO2020031540A1 (en) * | 2018-08-10 | 2020-02-13 | アルプスアルパイン株式会社 | Torque sensor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102021119364A1 (en) | 2021-07-27 | 2023-02-02 | Minebea Mitsumi Inc. | Measuring device, drive device with the measuring device and two-wheeler with the measuring device |
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| Publication number | Publication date |
|---|---|
| CN112129440B (en) | 2022-04-29 |
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