CN210322108U

CN210322108U - Torque sensor

Info

Publication number: CN210322108U
Application number: CN201920756442.7U
Authority: CN
Inventors: 闫游洋
Original assignee: Bengbu Ocean Sensing System Engineering Co ltd
Current assignee: Bengbu Ocean Sensing System Engineering Co ltd
Priority date: 2019-05-24
Filing date: 2019-05-24
Publication date: 2020-04-14
Anticipated expiration: 2029-05-24

Abstract

The utility model discloses a torque sensor, including elastic shaft, foil gage, sliding ring, mounting panel, fix conducting strip, connector on the mounting panel, conducting strip one end and sliding ring electric connection, the conducting strip other end and connector electric connection, elastic shaft include the first axis of rotation and the second axis of rotation of coaxial setting, first axis of rotation with be equipped with the connecting axle between the second axis of rotation, the foil gage is installed on the connecting axle, the sliding ring cup joints in the first axis of rotation or the second axis of rotation outside. The utility model has the advantages that: with the foil gage setting in the sliding ring outside to with sliding ring integral type injection moulding, the conducting strip passes through the difference signal who connects the foil gage between the wire, installation and easy maintenance, when the chip damages, only need change the chip alone, need not to pull down the sliding ring again, and can also get rid of the chip in the sliding ring outside with the foil gage setting and receive the influence that epoxy glued and bring, avoided the foil gage lag and creep, further improved the precision of sensor.

Description

Torque sensor

Technical Field

The utility model relates to a sensor technical field especially relates to a torque sensor.

Background

The torque sensor is used for detecting the sensing of the torsional moment on various rotating or non-rotating mechanical parts, and converts the physical change of the torsional force into an accurate electric signal; torque sensors are currently widely used in the field of measurement.

The utility model with the publication number of CN 205958157U discloses a torque sensor, which comprises an elastic shaft, a strain gauge connected with the elastic shaft, and a plug for outputting signals; the torque sensor also comprises a slip ring, a reed and a carbon brush holder; the slip ring is electrically connected with the strain gauge; one end of the reed is electrically connected with the slip ring, and the other end of the reed is electrically connected with the plug; the carbon brush holder is used for fixing the position of the reed.

According to the torque sensor, the strain gauge is arranged inside the slip ring, the slip ring is sleeved on the slip ring frame, the slip ring frame is bonded outside the elastic shaft through the epoxy resin glue, but the epoxy resin glue filled and sealed between the slip ring frame and the elastic shaft can influence the performance of the sensor, specifically, the signal of the strain gauge lags and creeps, and therefore the torque measurement precision is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing a torque sensor.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a torque sensor, includes elastic shaft, foil gage, sliding ring, mounting panel, fixes conducting strip, connector on the mounting panel, conducting strip one end and sliding ring electric connection, the conducting strip other end and connector electric connection, the elastic shaft is including coaxial first axis of rotation and the second axis of rotation that sets up, first axis of rotation with be equipped with the connecting axle between the second axis of rotation, the foil gage is installed on the connecting axle, the sliding ring cup joints first axis of rotation or the second axis of rotation outside.

Preferably, the device further comprises a housing, and the elastic shaft is rotatably connected in the housing.

Preferably, the shell includes the fixed block, and the fixed block upside is equipped with first mounting groove, and the inboard bottom of first mounting groove is equipped with the groove of stepping down, the both sides that the fixed block is relative all are equipped with the rotation hole, two rotate the coaxial setting in hole and all with the groove of stepping down is linked together, first axis of rotation with second axis of rotation one-to-one is in rotate downthehole the rotation.

Preferably, the mounting plate is fixedly connected in the mounting groove.

Preferably, a second mounting groove is formed in the connecting shaft, and the strain gauges are mounted on one side in the second mounting groove in a one-to-one correspondence mode.

Preferably, the slip ring comprises an insulating ring, a conductive ring is sleeved outside the insulating ring, and the conductive ring is electrically connected with the strain gauge through a conducting wire.

Preferably, an annular groove is formed in the outer side of the insulating ring, and the conducting ring is arranged in the annular groove.

Preferably, the insulating ring is formed by injection molding, and the wire is arranged in the insulating ring.

Preferably, the first rotating shaft and the second rotating shaft are both provided with a key groove.

Preferably, the key slot is internally provided with a key plate.

The utility model has the advantages that: the utility model provides a torque sensor sets up the foil gage in the sliding ring outside to with sliding ring integral type injection moulding, the conducting strip passes through the difference signal of connecting the foil gage between the wire, installation and easy maintenance, when the chip damages, only need change the chip alone, need not to pull down the sliding ring again, and can also get rid of the chip in the sliding ring outside with the foil gage setting and receive the influence that epoxy glued and bring, avoided the foil gage lag and creep, further improved sensor's precision.

Drawings

Fig. 1 is a schematic diagram of a basic structure of a torque sensor provided by the present invention;

FIG. 2 is a schematic view of the basic structure of the slip ring;

FIG. 3 is a schematic diagram of the basic structure of the housing;

FIG. 4 is a schematic diagram of the basic structure of the mounting board and the conductive sheet;

FIG. 5 is a schematic view of the basic structure of the elastic shaft;

FIG. 6 is an enlarged view of section E of FIG. 5;

fig. 7 is a sectional view a-a of fig. 5.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in fig. 1-7, the utility model provides a pair of torque sensor, including shell 1, elastic shaft 4, four foil gage 8, sliding ring 7, mounting panel 5, fix four conducting strips 6, connector 3 on mounting panel 5, shell 1 includes

fixed block

11, and 11 upsides of fixed block are equipped with first mounting groove 12, and mounting panel 5 fixed connection is in

first mounting groove

12, 12 inboard bottoms of first mounting groove are equipped with the groove of stepping down 13, and conducting strip 6 is convex piece, and conducting strip 6 stretches into downwards to the groove of stepping down 13 first mounting groove 12 department is equipped with apron 2, be equipped with the mounting hole on the apron 2, connector 3 fixes in the mounting hole, and four electrodes of connector 3 pass through signal line 61 one-to-ones and four conducting strip 6 electric connection.

The both sides that the fixed block 11 is relative all are equipped with rotates hole 14, two rotate the coaxial setting in hole 14 and all with the groove of stepping down 13 is linked together. The elastic shaft 4 includes a first rotating shaft 41 and a second rotating shaft 42 coaxially disposed, and the first rotating shaft 41 and the second rotating shaft 42 respectively rotate in the rotating hole 14 through a bearing 46. The first rotating shaft 41 and the second rotating shaft 42 are integrally formed to be provided with a square connecting shaft 43, four triangular second mounting grooves 431 are formed in the connecting shaft 43, the four second mounting grooves 431 are uniformly arranged by taking the axis of the first rotating shaft 41 as the center, and the strain gauge 8 is mounted on one side in each second mounting groove 431 in a one-to-one correspondence mode through 704 glue.

The slip ring 7 comprises an insulating ring 71, the insulating ring 71 is sleeved outside the first rotating shaft 41 or the second rotating shaft 42, and the insulating ring 71 and the first rotating shaft 41 or the second rotating shaft 42 are bonded and fixed through epoxy resin glue. Four annular grooves are uniformly arranged on the outer side of the insulating ring 71, a conducting ring 72 is arranged in each annular groove, and the inner arc surface of the conducting strip 6 is in contact with the conducting ring 72. Each conductive ring 72 is electrically connected to its corresponding strain gauge 8 by a wire 73. The insulation ring 71 is made of polyethylene by injection molding, and when the insulation ring 71 is injection molded, the lead wire 73 is injection molded in the insulation ring 71.

The first rotating shaft 41 and the second rotating shaft 42 are both provided with key grooves 45, the bottom of the inner side of each key groove 45 is provided with a threaded hole 45, a key plate 9 is arranged in each key groove 45, and each key plate 9 is provided with a counter bore 91. The key plate 9 is secured within the key slot 45 by a bolt 92, which bolt 92 passes through the counterbore 91 and is threaded within the threaded hole 45.

When the device is used, a main shaft of the motor is coaxially fixed with the first rotating shaft 41, an input shaft of the device to be measured is coaxially fixed with the second rotating shaft 42, the motor is started, the motor drives the first rotating shaft 41 to rotate, and drives the second rotating shaft 42 to rotate through the connecting shaft, so that the device to be measured is driven to rotate, when the first rotating shaft 41 and the second rotating shaft 42 rotate, the connecting shaft 43 can generate torsion deformation, so that the resistance value of the strain gauge 8 changes, the resistance value changes to cause voltage change, the signal value of the voltage change is transmitted to the connector 3 through the lead 73, the conducting ring 72, the conducting sheet 6 and the signal wire 61, and the signal is transmitted through the connector 3. The conducting strip 6 is a circular arc surface, and the conducting strip 6 and the conducting ring 72 are in surface contact, so that signals are stably transmitted.

Claims

1. The utility model provides a torque sensor, includes elastic shaft (4), foil gage (8), sliding ring (7), mounting panel (5), fixes conducting strip (6), connector (3) on mounting panel (5), conducting strip (6) one end and sliding ring (7) electric connection, conducting strip (6) other end and connector (3) electric connection, its characterized in that: the elastic shaft (4) comprises a first rotating shaft (41) and a second rotating shaft (42) which are coaxially arranged, a connecting shaft (43) is arranged between the first rotating shaft (41) and the second rotating shaft (42), the strain gauge (8) is installed on the connecting shaft (43), and the sliding ring (7) is sleeved on the outer side of the first rotating shaft (41) or the second rotating shaft (42).

2. A torque transducer as claimed in claim 1, wherein: the device also comprises a shell (1), and the elastic shaft (4) is rotationally connected in the shell (1).

3. A torque transducer according to claim 2, wherein: shell (1) is equipped with first mounting groove (12) including fixed block (11), fixed block (11) upside, and first mounting groove (12) inboard bottom is equipped with the groove of stepping down (13), fixed block (11) relative both sides all are equipped with rotation hole (14), two rotate hole (14) coaxial settings and all with the groove of stepping down (13) is linked together, first axis of rotation (41) with second axis of rotation (42) one-to-one is in rotate hole (14) internal rotation.

4. A torque transducer according to claim 3, wherein: the mounting plate (5) is fixedly connected in the first mounting groove (12).

5. A torque transducer as claimed in claim 1, wherein: the connecting shaft (43) is provided with a second mounting groove (431), and the strain gauges (8) are correspondingly mounted on one side in the second mounting groove (431).

6. A torque transducer as claimed in claim 1, wherein: the slip ring (7) comprises an insulating ring (71), a conductive ring (72) is sleeved on the outer side of the insulating ring (71), and the conductive ring (72) is electrically connected with the strain gauge (8) through a lead (73).

7. A torque transducer according to claim 6, wherein: an annular groove is formed in the outer side of the insulating ring (71), and the conducting ring (72) is arranged in the annular groove.

8. A torque transducer according to claim 6, wherein: the insulating ring (71) is formed by injection molding, and the lead (73) is arranged in the insulating ring (71).

9. A torque transducer as claimed in claim 1, wherein: the first rotating shaft (41) and the second rotating shaft (42) are both provided with key grooves (45).

10. A torque transducer as claimed in claim 9, wherein: a key plate (9) is arranged in the key groove (45).