CN116581938A

CN116581938A - Flywheel torque sensor

Info

Publication number: CN116581938A
Application number: CN202310665000.2A
Authority: CN
Inventors: 李扬; 任国庆; 刘华; 陈铎; 张巍; 夏明亮; 范志强; 汤贵平; 洪黎
Original assignee: Beijing Dingyu Chenxing Technology Service Co ltd
Current assignee: Beijing Dingyu Chenxing Technology Service Co ltd
Priority date: 2023-06-06
Filing date: 2023-06-06
Publication date: 2023-08-11
Anticipated expiration: 2043-06-06
Also published as: CN116581938B

Abstract

The application relates to the technical field of sensors, in particular to a flywheel torque sensor which comprises a flywheel shell, a stator and a rotor. The stator comprises a main coil disc with a main-stage coil and a power supply device electrically connected with the main-stage coil, and the main coil disc is arranged on the flywheel shell; the rotor comprises a flywheel disc, a secondary coil disc and a signal module which are sequentially overlapped, the flywheel disc is arranged on the flywheel shell, a secondary coil is arranged on the secondary coil disc, a through groove is formed in the flywheel disc, a strain gauge is adhered to the inner wall of the through groove, the signal module is respectively and electrically connected with the secondary coil and the strain gauge, and the signal module is used for sending out detection signals of the strain gauge. The application has the effect of improving the detection precision of the torque.

Description

Flywheel torque sensor

Technical Field

The application relates to the technical field of sensors, in particular to a flywheel torque sensor.

Background

At present, a torque sensor mainly refers to an instrument for measuring a torque signal of equipment, and is divided into two types of dynamic and static, wherein the dynamic torque sensor can be called a torque sensor, a torque rotating speed sensor, a non-contact torque sensor, a rotating torque sensor and the like.

In an automobile, when the flywheel is required to detect the torque of a flywheel torque shaft due to a small installation position space, a sensor with a small volume is required to detect the torque. The sensor in the related art has larger volume, and the signal for detecting the torque needs to be transmitted in a wired way, so that the wiring is complicated; and the signal module of the sensor is powered by a rechargeable battery, so that the condition of insufficient power supply or power failure is easy to occur, the eccentric problem of the torque sensor is also increased, the torque detection precision is low, and the installation is inconvenient.

Disclosure of Invention

In order to improve the detection accuracy of torque, the application provides a flywheel torque sensor.

The application provides a flywheel torque sensor, which adopts the following technical scheme:

a flywheel torque sensor comprising

Flywheel housing;

the stator comprises a main coil disc with a main-stage coil and a power supply device electrically connected with the main-stage coil, and the main coil disc is arranged on the flywheel shell;

the rotor comprises a flywheel disc, a secondary coil disc and a signal module which are sequentially overlapped, wherein the flywheel disc is arranged on the flywheel shell, a secondary coil is arranged on the secondary coil disc, a through groove is formed in the flywheel disc, a strain gauge is adhered to the inner wall of the through groove, the signal module is respectively and electrically connected with the secondary coil and the strain gauge, and the signal module is used for sending out detection signals of the strain gauge.

Through adopting above-mentioned technical scheme, flywheel dish rotation can drive secondary coil dish and rotate, and secondary coil dish can drive secondary coil and rotate, and power supply unit can supply power to main level coil to make pivoted secondary coil and the interaction of energized main level coil, make the secondary coil produce induced current and supply power for signal module. At this moment, the flywheel disk rotates, so that the flywheel disk deforms, deformation on the inner wall of the through groove is more obvious, the strain gauge converts deformation into an electric signal to be transmitted to the signal module, the signal module is convenient to wirelessly transmit the electric signal to a measuring instrument for display and analysis, and the detection precision of torque is improved to a certain extent.

Optionally, the through slots are formed in a plurality, and the through slots are uniformly distributed around the axis of the flywheel disc.

Through adopting above-mentioned technical scheme, offer of a plurality of logical grooves for flywheel dish when rotating, the deformation of flywheel dish in logical groove department is more obvious, thereby is convenient for the foil gage detects, and then is favorable to improving moment of torsion detection precision.

Optionally, the flywheel disc is provided with a balancing weight, and the balancing weight is arranged close to the side of the flywheel disc.

Through adopting above-mentioned technical scheme, the setting of balancing weight has increased the moment of inertia of flywheel dish to a certain extent to the flywheel dish of being convenient for can stably rotate.

Optionally, the device further comprises an auxiliary mounting mechanism, wherein the auxiliary mounting mechanism comprises a mounting block and a pressing component arranged on the mounting block, one end of the mounting block is provided with an opening, the strain gauge is inserted into the opening, and the pressing component is used for pressing the strain gauge.

Through adopting above-mentioned technical scheme, when needs are installed the foil gage in logical inslot, place the opening with the foil gage earlier in, remove the installation piece to logical inslot again to make installation piece upper shed's one end and logical inslot wall conflict, then exert pressure to pressing the subassembly, make pressing the subassembly promote the foil gage closely laminating on logical inslot wall, thereby be convenient for install the foil gage on logical inslot wall steadily.

Optionally, the mounting block is interior seted up with the holding tank of opening intercommunication, the mounting block keep away from open-ended one end seted up with the spout of holding tank intercommunication, press the subassembly including push rod, guide bar and briquetting, the one end of guide bar with the push rod is connected, the push rod the guide bar slides respectively and inserts and establish in the spout, the briquetting slides and sets up in the holding tank, the one end of briquetting with guide bar sliding connection, the other end of briquetting with the foil gage is contradicted, the guide bar is used for promoting the briquetting is in the holding tank internal motion.

Through adopting above-mentioned technical scheme, when the foil gage laminating is on logical inslot wall, exert pressure to the push rod for the push rod removes to the holding tank, and the push rod drives the guide bar and removes, and the guide bar drives the briquetting and removes to one side of holding tank in the holding tank, and the briquetting slides on the foil gage with the one end that the foil gage contradicted this moment, and the briquetting exerts pressure to the foil gage, thereby makes the gas between foil gage and the logical inslot wall by extrusion discharge, and then is favorable to reducing to have the bubble between foil gage and the logical inslot wall, leads to the possibility that the foil gage drops easily after bonding on logical inslot wall.

Optionally, the guide bar is provided with a guide groove along the length direction of the guide bar, and one end of the pressing block is slidably inserted into the guide groove.

Through adopting above-mentioned technical scheme, when the guide bar removes, the inner wall of guide slot can exert effort to the briquetting for the briquetting removes in the holding tank along with the removal of guide bar, thereby the guide bar of being convenient for drives the briquetting and stably moves.

Optionally, two pressing blocks are provided, the two pressing blocks are respectively connected with the guide rod in a sliding manner, and an elastic piece is arranged between the two pressing blocks.

By adopting the technical scheme, when the push rod drives the guide rod to move into the accommodating groove, the guide rod can push the two pressing blocks to move back, and the elastic piece stretches at the moment; when the guide bar no longer exerts effort to the briquetting, the elastic component shrink drives two briquetting and removes for the distance of two briquetting reduces, thereby makes two briquetting return to normal position, and the briquetting exerts effort to the guide bar simultaneously, makes the guide bar drive the push rod and removes outside the holding tank, and then is convenient for make guide bar and push rod return to normal position.

Optionally, the end face of the pressing block, which is abutted against the strain gauge, is a smooth surface.

Through adopting above-mentioned technical scheme, smooth surface's setting for coefficient of friction between briquetting and the foil gage is less, thereby makes the briquetting can be smooth and easy removal relatively on the foil gage, and is favorable to making the briquetting remove on the foil gage, is difficult for producing the damage to the foil gage.

Optionally, elastic hooks for clamping with the flywheel disc are respectively arranged on two sides of the mounting block.

Through adopting above-mentioned technical scheme, the setting of elasticity couple is convenient for with the position that is close to logical groove of installation piece joint on dividing the rim plate to be favorable to reducing when utilizing the pressing component to press the foil gage, the position of installation piece appears shifting, leads to the possibility that the position of foil gage also appears shifting, thereby be convenient for accurately install the foil gage at the appointed position.

Optionally, the installation piece is close to the one end of opening is provided with the elastic block, the elastic block be used for with main level coil joint, the installation piece the elastic block is made by heat conduction material.

Through adopting above-mentioned technical scheme, the setting of elastic block can carry out the joint to the foil gage on the one hand for the foil gage is difficult for breaking away from the installation piece in the removal in installation piece, and on the other hand installation piece can be made on main level coil through the elastic block joint, and because elastic block and mounting hole are by heat conduction material, thereby the heat that produces when making main level coil circular telegram can transmit elastic block and installation piece, rethread elastic block and installation piece give off, and then be convenient for dispel the heat to main level coil, has reduced the possibility that main level coil damaged because of overheated to a certain extent takes place.

In summary, the present application includes at least one of the following beneficial technical effects:

1. through the mutual matching of the main coil plate, the main-stage coil, the power supply device, the flywheel disc, the secondary coil plate, the signal module and the strain gauge, the deformation on the inner wall of the through groove is more obvious when the flywheel disc rotates, so that the strain gauge is convenient for converting the deformation into an electric signal to be transmitted to the signal module, the signal module is used for wirelessly transmitting the electric signal to a measuring instrument for display analysis, and further the detection precision of the torque is improved;

2. through the mutual matching of the mounting block, the push rod, the guide rod, the pressing block and the elastic piece, when the push rod drives the guide rod to move into the accommodating groove, one end of the pressing block, which is abutted against the strain gauge, can slide on the strain gauge and exert pressure on the strain gauge, so that gas between the strain gauge and the inner wall of the through groove is extruded and discharged, and further, the possibility that bubbles exist between the strain gauge and the inner wall of the through groove and the strain gauge is easy to fall off after being adhered to the inner wall of the through groove is reduced;

3. the setting of elastic block can carry out the joint to the foil gage on the one hand for the foil gage is difficult for breaking away from in the installation piece removal process, and on the other hand the installation piece can be through the elastic block joint on main level coil, thereby the produced heat distributes away when being convenient for electrify main level coil, and then is favorable to reducing main level coil and takes place the possibility of damage because of overheated.

Drawings

Fig. 1 is a schematic diagram of the overall structure of a flywheel torque sensor according to an embodiment of the present application.

Fig. 2 is an exploded view of a flywheel torque sensor without a power supply device and an auxiliary mounting mechanism according to an embodiment of the present application.

Fig. 3 is a schematic structural view of an auxiliary mounting mechanism according to an embodiment of the present application.

Fig. 4 is a cross-sectional view taken along line A-A in fig. 3.

Reference numerals illustrate:

1. flywheel housing; 2. a stator; 21. a main coil panel; 22. a power supply device; 3. a rotor; 31. a flywheel disc; 311. a through groove; 312. balancing weight; 32. a secondary coil disk; 33. a signal module; 4. a strain gage; 5. an auxiliary mounting mechanism; 51. a mounting block; 511. an opening; 512. an elastic block; 513. a receiving groove; 514. a chute; 515. an elastic hook; 52. a pressing assembly; 521. a push rod; 522. a guide rod; 5221. a guide groove; 523. briquetting; 524. an elastic member.

Detailed Description

The application is described in further detail below with reference to fig. 1-4.

The embodiment of the application discloses a flywheel torque sensor.

Example 1

Referring to fig. 1 and 2, the flywheel torque sensor includes a flywheel housing 1, a stator 2, and a rotor 3. The stator 2 comprises a main coil plate 21 with a main-stage coil and a power supply device 22 electrically connected with the main-stage coil, wherein the main coil plate 21 is fixedly arranged on the flywheel housing 1; the rotor 3 includes flywheel dish 31, secondary coil dish 32 and signal module 33 that superpose in proper order, flywheel dish 31 rotates to be connected on flywheel casing 1, and the bonding has foil gage 4 on the flywheel dish 31, secondary coil dish 32 and the corresponding setting of main coil dish 21 each other, and be provided with the secondary coil on the secondary coil dish 32, the secondary coil respectively with signal module 33 and foil gage 4 electric connection, thereby make flywheel dish 31 drive secondary coil dish 32 rotation, and when power supply unit 22 was the main level coil power supply, the secondary coil can produce induced current and supply for signal module 33, so that signal module 33 transmits the detected signal of foil gage 4 to the display analysis on the measuring instrument, and then be favorable to improving the detection precision of moment of torsion.

The flywheel disc 31 can be connected with an external motor output shaft, so that the flywheel disc 31 can be conveniently driven to rotate by the motor.

The flywheel disc 31 is provided with a plurality of through grooves 311, the through grooves 311 are uniformly distributed around the axis of the flywheel disc 31, and the through grooves 311 are mutually spaced. When the flywheel disc 31 rotates, the flywheel disc 31 deforms, and the deformation on the inner wall of the through groove 311 is more obvious.

The strain gauge 4 is adhered to the inner wall of the through groove 311, so that deformation of the inner wall of the through groove 311 can be detected by the strain gauge 4 conveniently, and the strain gauge 4 can convert the deformation of the inner wall of the through groove 311 into an electric signal to be transmitted to the signal module 33, so that the purpose of improving the detection precision of torque is achieved.

The signal module 33 in this embodiment can transmit the electrical signal to the measuring instrument by wireless transmission, thereby avoiding the limitation of the measuring mode and the defect of complicated wiring in the wired transmission and improving the detection precision.

Referring to fig. 1, a weight 312 is fixedly connected to the flywheel disc 31, and the weight 312 is disposed near an edge of the flywheel disc 31, so as to facilitate increasing the moment of inertia of the flywheel disc 31, and enable the flywheel disc 31 to rotate stably.

The implementation principle of the flywheel torque sensor of the embodiment 1 of the application is as follows: when the flywheel disc 31 rotates, the secondary coil disc 32 can be driven to rotate, the secondary coil disc 32 can drive the secondary coil to rotate, and the power supply device 22 can supply power to the primary coil, so that the rotating secondary coil interacts with the energized primary coil, and an induced current can be generated on the secondary coil to supply power to the signal module 33. At this time, the strain gauge 4 converts the deformation generated on the inner wall of the through groove 311 into an electrical signal, and transmits the electrical signal to the signal module 33, and the signal module 33 transmits the electrical signal to the measuring instrument in a wireless manner for display and analysis, thereby achieving the purpose of detecting the torque of the flywheel disc 31.

In the flywheel torque sensor in this embodiment, the primary coil and the secondary coil are relatively moved, so that the secondary coil generates an induced current to supply power to the signal module 33, the eccentric load resistance of the rotor 3 is enhanced to a certain extent, and the condition of insufficient power or interruption generated when an external power source is used is avoided, so that the signal module 33 can stably work.

Example 2

Example 2 differs from example 1 in that: an auxiliary mounting mechanism 5 is also included.

Referring to fig. 3 and 4, the auxiliary mounting mechanism 5 includes a mounting block 51 and a pressing assembly 52 provided on the mounting block 51. Wherein, one end of the mounting block 51 is opened 511, and one end of the opening 511 of the mounting block 51 is fixedly connected with an elastic block 512. In this embodiment, two elastic blocks 512 are provided, and the two elastic blocks 512 are disposed opposite to each other.

The strain gauge 4 can be inserted into the opening 511 and clamped by the two elastic blocks 512 together, so that the strain gauge 4 is not easy to separate from the mounting block 51 in the process of moving the mounting block 51. And the two elastic blocks 512 are matched with each other, so that the mounting block 51 can be clamped on the main-stage coil.

In this embodiment, the elastic block 512 and the mounting block 51 are made of heat conducting materials, so that when the mounting block 51 is clamped on the primary coil through the elastic block 512, heat generated by energizing the primary coil can be transferred to the elastic block 512 and the mounting block 51, and then dissipated through the elastic block 512 and the mounting block 51, thereby facilitating heat dissipation of the primary coil, and reducing the possibility of damage of the primary coil due to overheating to a certain extent.

Referring to fig. 1, a receiving groove 513 is formed in the mounting block 51, the receiving groove 513 is communicated with the opening 511, a sliding groove 514 is formed in one end of the mounting block 51 away from the opening 511, and the sliding groove 514 is communicated with the receiving groove 513.

The pressing assembly 52 includes a push rod 521, a guide rod 522, and a pressing block 523. The two guide rods 522 in this embodiment are provided, the two guide rods 522 are fixedly connected with the push rod 521 respectively, the two guide rods 522 are mutually symmetrical and are obliquely arranged relative to the push rod 521, and each guide rod 522 is provided with a guide groove 5221 along its length direction. The end of the push rod 521 connected to the guide rod 522 is slidably inserted into the slide groove 514.

The two pressing blocks 523 are provided, the two pressing blocks 523 are respectively arranged in the accommodating groove 513 in a sliding manner, and the two pressing blocks 523 are respectively attached to the inner wall of the accommodating groove 513. One end of one of the pressing blocks 523 is slidably inserted into one of the guide grooves 5221, and one end of the other pressing block 523 is slidably inserted into the other guide groove 5221.

The guide groove 5221 in this embodiment can limit the pressing block 523, so that the pressing block 523 is not easy to separate from the guide groove 5221, and when the guide rod 522 slides in the chute 514, the guide rod 522 can drive the pressing block 523 to move in the accommodating groove 513.

When the pressing block 523 is located in the accommodating groove 513, and the strain gauge 4 is inserted into the opening 511, one end of the pressing block 523 away from the guide rod 522 can be abutted against the strain gauge 4, so that when the guide rod 522 drives the pressing block 523 to move in the accommodating groove 513, the pressing block 523 can move on the strain gauge 4.

In addition, the end face of the end, away from the guide rod 522, of the pressing block 523 is a smooth surface, so that the friction coefficient between the pressing block 523 and the strain gauge 4 is small, and the pressing block 523 is not easy to damage the strain gauge 4 when moving on the strain gauge 4.

Referring to fig. 1, an elastic member 524 is fixedly connected between two pressing blocks 523, the elastic member 524 is provided with two, and the two elastic members 524 are spaced apart from each other and are located between the two pressing blocks 523. The elastic member 524 in this embodiment is a tension spring.

When the guide rod 522 moves into the accommodating groove 513, the guide rod 522 can apply pressure to the pressing blocks 523, so that the two pressing blocks 523 move back in the accommodating groove 513, and at this time, the elastic member 524 is stretched; when the guide rod 522 no longer applies the acting force to the pressing blocks 523, the elastic element 524 contracts to drive the two pressing blocks 523 to move, so that the distance between the two pressing blocks 523 is reduced, and the two pressing blocks 523 return to the original position, and meanwhile, the pressing blocks 523 apply the acting force to the guide rod 522, so that the guide rod 522 drives the push rod 521 to move outwards of the accommodating groove 513, and the guide rod 522 and the push rod 521 return to the original position conveniently.

Referring to fig. 1 and 3, elastic hooks 515 are fixedly connected to both sides of the mounting block 51, respectively, and the elastic hooks 515 are used for being clamped with the flywheel disc 31. When the mounting block 51 is inserted into the through groove 311, the elastic hook 515 can hook the flywheel disc 31, thereby fixing the position of the mounting block 51.

The implementation principle of the embodiment 2 of the application is as follows: when the strain gauge 4 is required to be mounted on the inner wall of the through groove 311, the strain gauge 4 is inserted into the opening 511, clamped by the elastic block 512, the mounting block 51 is inserted into the through groove 311, and the position of the mounting block 51 is fixed by the elastic hook 515. At this time, the strain gauge 4 is attached to the inner wall of the through groove 311.

Then, pressure is applied to the push rod 521, so that the push rod 521 moves toward the accommodating groove 513, the push rod 521 drives the guide rod 522 to move, and the guide rod 522 drives the pressing blocks 523 to move in the accommodating groove 513, so that the two pressing blocks 523 move back. At this time, the elastic member 524 is extended, the pressing block 523 presses the strain gauge 4 at the end against the strain gauge 4 and slides on the strain gauge 4, so as to squeeze and discharge the gas between the strain gauge 4 and the inner wall of the through groove 311, so that the strain gauge 4 is tightly adhered to the inner wall of the through groove 311

Finally, no pressure is applied to the push rod 521, the elastic member 524 contracts to drive the pressing block 523, the guide rod 522 and the push rod 521 to return to the original positions, and then the mounting block 51 is removed from the flywheel disc 31, so that the mounting of the strain gage 4 is completed.

The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.

Claims

1. A flywheel torque sensor, comprising:

a flywheel housing (1);

the stator (2), the stator (2) comprises a main coil (21) with a main-stage coil and a power supply device (22) electrically connected with the main-stage coil, and the main coil (21) is arranged on the flywheel housing (1);

rotor (3), rotor (3) are including flywheel dish (31), secondary coil dish (32) and signal module (33) of superpose in proper order, flywheel dish (31) set up on flywheel casing (1), be provided with secondary coil on secondary coil dish (32), open logical groove (311) on flywheel dish (31), the bonding has foil gage (4) on the inner wall of logical groove (311), signal module (33) respectively with secondary coil with foil gage (4) electric connection, signal module (33) are used for with the detected signal of foil gage (4) sees off.

2. A flywheel torque sensor as claimed in claim 1, wherein: the through grooves (311) are formed in a plurality, and the through grooves (311) are uniformly distributed around the axis of the flywheel disc (31).

3. A flywheel torque sensor as claimed in claim 1, wherein: the flywheel disc (31) is provided with a balancing weight (312), and the balancing weight (312) is arranged close to the side of the flywheel disc (31).

4. A flywheel torque sensor as claimed in claim 1, wherein: the strain gauge comprises a mounting block (51), and is characterized by further comprising an auxiliary mounting mechanism (5), wherein the auxiliary mounting mechanism (5) comprises the mounting block (51) and a pressing component (52) arranged on the mounting block (51), one end of the mounting block (51) is provided with an opening (511), the strain gauge (4) is inserted into the opening (511), and the pressing component (52) is used for pressing the strain gauge (4).

5. A flywheel torque sensor as claimed in claim 4, wherein: the utility model discloses a device for pressing a strain gauge, including installation piece (51), installation piece (51) and mounting piece (511) are connected, set up in installation piece (51) with holding tank (513) intercommunication, installation piece (51) keep away from one end of opening (511) set up with spout (514) of holding tank (513) intercommunication, pressing component (52) include push rod (521), guide bar (522) and briquetting (523), one end of guide bar (522) with push rod (521) are connected, push rod (521) guide bar (522) slides respectively and inserts in spout (514), briquetting (523) slide and set up in holding tank (513), one end of briquetting (523) with guide bar (522) sliding connection, the other end of briquetting (523) with strain gauge (4) conflict, guide bar (522) are used for promoting briquetting (523) are in holding tank (513) internal motion.

6. A flywheel torque sensor as claimed in claim 5, wherein: the guide rod (522) is provided with a guide groove (5221) along the length direction of the guide rod, and one end of the pressing block (523) is slidably inserted into the guide groove (5221).

7. A flywheel torque sensor as claimed in claim 5, wherein: the two pressing blocks (523) are arranged, the two pressing blocks (523) are respectively connected with the guide rods (522) in a sliding mode, and elastic pieces (524) are arranged between the two pressing blocks (523).

8. A flywheel torque sensor as claimed in claim 5, wherein: the end face of the pressing block (523) which is abutted against the strain gauge (4) is a smooth surface.

9. A flywheel torque sensor as claimed in claim 4, wherein: elastic hooks (515) used for being clamped with the flywheel disc (31) are respectively arranged on two sides of the mounting block (51).

10. A flywheel torque sensor as claimed in claim 4, wherein: the installation piece (51) is close to one end of opening (511) is provided with elastic block (512), elastic block (512) be used for with main level coil joint, installation piece (51) elastic block (512) are made by the heat conduction material.