CN216978199U - Torsion testing device - Google Patents

Abstract

The utility model relates to a torsion testing device, which comprises a measuring seat, a force sensor, a motor module, a flexible coupling and an output shaft. The force sensor is fixedly arranged on the measuring seat. The motor module is arranged on the measuring seat and is provided with a motor fixing frame, an arm rod and a motor. The motor fixing frame can be rotationally arranged on the measuring seat by taking a torsion axis as an axis; the arm rod protrudes out of the motor fixing frame and can abut against the force sensor, so that the rotation of the motor fixing frame is limited; the motor is fixedly arranged on the motor fixing frame. Two ends of the flexible coupling are respectively connected with the driving shaft and the output shaft. The other end of the output shaft is used for connecting a pivoting piece of the torsion to be measured. Therefore, the torque force measuring device can be easily integrated into an automatic production line to quickly and accurately measure the torque force value of the production line part.

Description

Torsion testing device

Technical Field

The present invention relates to a torque measuring device, and more particularly to a torque measuring device capable of measuring torque rapidly on an automatic production line.

Background

Referring to fig. 10, the prior art torsion testing machine includes a base 91, a force sensor (not shown), a measuring base 92, a rotating base 93 and a motor 94. One end of the force sensor is fixed on the base 91, the measuring base 92 is fixed on the other end of the force sensor, the rotating base 93 is movably arranged on the base 91 around the measuring base 92, and the motor 94 drives the rotating base 93 to move around relative to the base 91. Before measuring the torsion, the base end 951 of the pivot member 95 to be tested (e.g., a base capable of adjusting the pitch angle of a computer screen) is fixed to the measuring base 92 manually, the pivot end of the pivot member 95 is connected to the rotating base 93 (specifically, the pivot end of the pivot member 95 is connected to the rotating base 93 through an extension fixture 96), and then the motor 94 drives the rotating base 93 to move around, so that the pivot end of the pivot member 95 rotates relative to the base end 951, and the torsion characteristic of the pivot member 95 is measured by the force sensor. Existing torque testers are typically used to sample mass produced pivots to ensure quality.

However, since some of the pivoting members 95 have more strict requirements for quality, the pivoting members 95 in the production line must be inspected completely to ensure that the torsion characteristics of each pivoting member 95 meet the requirements for shipment, but the conventional torsion testing machine still needs to fix the pivoting members 95 manually, and the measuring speed is too slow to meet the requirement for full inspection.

Therefore, the torque testing machine of the prior art is to be improved.

SUMMERY OF THE UTILITY MODEL

In view of the foregoing drawbacks and deficiencies of the prior art, the present invention provides a torsion testing apparatus to increase the measuring speed.

To achieve the above object, the present invention provides a torsion testing apparatus for testing a pivoting member, the torsion testing apparatus comprising:

a measuring seat;

a force sensor which is fixedly arranged on the measuring seat and is provided with at least one measuring surface; the force sensor can measure the force abutting against the at least one measuring surface;

a motor module, it locates this measurement seat, this motor module has:

a motor fixing frame which can be rotatablely arranged on the measuring seat by taking a torsion axis as an axis,

an arm rod protruding from one side of the motor fixing frame and extending toward the radial direction of the torsion axis; the outer end of the arm lever selectively abuts against the at least one measuring surface of the force sensor to limit the motor fixing frame from rotating relative to the measuring seat;

a motor fixed on the motor fixing frame and having a driving shaft aligned with the torsion axis and capable of rotatably penetrating through the motor fixing frame and the measuring base;

a flexible coupling connected to the drive shaft of the motor and having;

a first fixing ring, which is located at one end of the flexible coupling and is sleeved on the driving shaft of the motor;

a second fixed ring, which is positioned at the other end of the flexible coupling;

the center line of the second fixing ring and the center line of the first fixing ring can be non-parallel, or the center line of the second fixing ring and the center line of the first fixing ring can be parallel and staggered;

one end of the output shaft penetrates through the second fixing ring of the flexible coupling, and the other end of the output shaft is used for being detachably connected with the pivoting piece.

When the utility model is used, the measuring seat can be arranged on a positioning mechanism of an automatic production line. When the pivoting part of the production line moves to the positioning mechanism, the positioning mechanism drives the torsion testing device to move towards the pivoting part, and an output shaft of the torsion testing device is connected with the pivoting part. Then, the motor of the torsion testing device applies torsion to the pivoting member through the flexible coupling and the output shaft, the reaction force from the pivoting member enables the motor fixing frame to rotate reversely and abut against the force sensor of the measuring seat, and the torsion applied to the pivoting member by the motor (namely the torsion borne by the pivoting member) can be calculated through the measured value of the force sensor.

The utility model has the advantages that:

first, it can be easily integrated into the existing automatic production line to achieve full-automatic torque measurement. Specifically, the force sensor and the pivot piece are respectively arranged at the fixed end (namely the body of the motor) and the driving end (namely the driving shaft of the motor) of the motor module, and the force sensor and the pivot piece are not connected in series with the driving end of the motor as in the conventional torque testing machine, so that when the torque force of the pivot piece is measured, the torque force can be measured only by connecting the output shaft with the pivot piece; meanwhile, the connection/disconnection between the output shaft and the pivot member can be achieved through simple mechanical actions, such as linear reciprocating motion, so that the present invention can be easily integrated into the existing automatic production line and quickly measure the torsion characteristics of the pivot member of the production line, and can fully inspect the pivot member of the production line.

Second, the flexible coupling can absorb misalignment between the pivot member and the drive shaft of the motor, ensuring accuracy of the torque measurement. Specifically, although the positioning mechanism of the production line can connect the output shaft of the torque testing device with the pivot member (for example, insert into a groove of the pivot member), it is practically difficult to ensure that the axis of the output shaft of the torque testing device and the rotation axis of the pivot member can be accurately positioned on the same straight line without any misalignment, and the flexible coupling can ensure the accuracy of the torque measurement under the condition that there is a little misalignment between the output shaft and the pivot member.

Furthermore, the torsion testing device further comprises a lower bearing which is arranged between the bottom of the motor fixing frame and the measuring seat and is positioned on the torsion axis, so that the motor fixing frame can rotate relative to the measuring seat; and the upper bearing is arranged between the top of the motor fixing frame and the measuring seat and is positioned on the torsion axis so that the motor fixing frame can rotate relative to the measuring seat.

Further, the drive shaft of the motor extends downward and through the lower bearing; the output shaft can move down linearly to connect the pivoting member or move up linearly to separate from the pivoting member.

Further, the torsion testing device further comprises a harness fixing seat; the wire harness fixing seat is arranged on the measuring seat and is positioned on the torsion axis, the flexible coupling and the wire harness fixing seat are respectively positioned on two opposite sides of the motor fixing frame along the extension direction of the torsion axis, and at least one wire harness of the motor is fixed on the wire harness fixing seat.

Further, the torsion testing apparatus is described, wherein the flexible coupling is a disc-type coupling.

Further, the torsion testing device is characterized in that the force sensor is provided with a measuring groove; the number of the at least one measuring surface is two, and the two side measuring surfaces are two opposite groove walls of the measuring groove respectively; the outer end of the arm rod of the motor module penetrates through the measuring groove and selectively abuts against one of the measuring surfaces.

Drawings

FIG. 1 is a perspective view of the present invention mounted to a positioning mechanism.

FIG. 2 is a perspective view of the present invention mounted to a positioning mechanism at another angle.

Fig. 3 is an exploded view of the components of the present invention.

Fig. 4 is an exploded view of the components of the present invention at another angle.

Fig. 5 is a schematic cross-sectional view of the present invention.

FIG. 6 is a schematic cross-sectional view of the present invention taken along line A-A.

Fig. 7 is a perspective external view of the core member of the present invention.

Fig. 8 and 9 are side-view usage diagrams of the present invention.

Fig. 10 is a perspective view of a prior art torsion testing machine.

Description of the reference numerals

1: torsion testing device

10 measuring seat

11: bottom plate

12: connecting seat

13 harness fixing seat

14 lower bearing

20 force sensor

21 load cell

22 extension block

221 measuring groove

30 motor module

31 motor fixing frame

311 ring part

312 upper bearing

32 arm rod

321 outer end of

33: motor

331 driving shaft

40 flexible shaft coupling

41 first fixing ring

42 second fixing ring

50: output shaft

A, pivoting member

A-A is section line

L is the axis of torsion

M is positioning mechanism

91: base

92 measuring seat

93 rotating base

94: motor

95 pivoting member

951 base end

96, an extension jig.

Detailed Description

The technical means adopted by the utility model to achieve the predetermined purpose of the utility model will be further described below with reference to the accompanying drawings and preferred embodiments of the utility model.

Referring to fig. 1, 2 and 9, the torsion testing apparatus 1 of the present invention is used to test a pivoting member a, which is a finished product or a semi-finished product in an automatic production line in this embodiment, and a plurality of pivoting members a are driven by a conveying device (not shown) to pass under the torsion testing apparatus 1 one by one. The torsion testing apparatus 1 is preferably installed at one end of a positioning mechanism M, and can move up and down to connect with or disconnect from the pivot member a by being driven by the positioning mechanism M.

Referring to fig. 3 to 5, the torque testing apparatus 1 includes a measuring base 10, a force sensor 20, a motor module 30, a flexible coupling 40 and an output shaft 50; in the embodiment, the device further includes a lower bearing 14, an upper bearing 312 and a harness fixing base 13.

The measuring base 10 is formed by assembling a plurality of flat plates in this embodiment, and the measuring base 10 is fixed on a positioning mechanism M of a production line, and the positioning mechanism M can drive the measuring base 10 to reciprocate up and down. In the present embodiment, the measuring base 10 has a bottom plate 11 and a connecting base 12, which are disposed at an interval from top to bottom, the lower bearing 14 is disposed in a through hole of the bottom plate 11, and the outer ring of the lower bearing 14 is abutted against the bottom plate 11 downward (as shown in fig. 5).

Referring to fig. 4, fig. 6 and fig. 7, the force sensor 20 is fixed on the measuring base 10. In the present embodiment, the force sensor 20 includes a load cell 21 and an extension block 22. The extension block 22 is fixed on the sensing portion of the load cell 21, and is formed with a measuring groove 221, two opposite groove walls of the measuring groove 221 are respectively a measuring surface, when an external force is applied to any measuring surface, the load cell 21 can measure a component force perpendicular to the measuring surface. The load cell 21 is a standard force sensor in the prior art, and the structure and principle thereof are not described herein again. In other preferred embodiments, the load cell 21 can be replaced by other types of force sensors, such as a piezoelectric pressure sensor.

Referring to fig. 4, fig. 5 and fig. 7, the motor module 30 is disposed on the measuring base 10 and has a motor fixing frame 31, an arm 32 and a motor 33. The motor holder 31 is rotatably disposed on the measuring base about a torsion axis L, which passes through the center of the lower bearing 14. The motor holder 31 is a rectangular frame for accommodating the motor 33.

In the present embodiment, a ring portion 311 protrudes from the bottom surface of the motor fixing frame 31, and the ring portion 311 penetrates through the lower bearing 14 and abuts against the inner ring of the lower bearing 14 downward. The upper bearing 312 is disposed in a through hole at the top of the motor fixing frame 31, and the center of the upper bearing 312 is located on the torsion axis L. The connecting base 12 of the measuring base 10 is downwardly inserted through the upper bearing 312. In other words, the lower bearing 14 is disposed between the bottom of the motor fixing frame 31 and the measuring seat 10, and is located on the torsion axis L; the upper bearing 312 is arranged between the top of the motor fixing frame 31 and the measuring seat 10 and is positioned on the torsion axis L; by providing the lower bearing 14 and the upper bearing 312, the motor holder 31 can smoothly rotate relative to the measuring base 10, and the rotation axis of the motor holder 31 can be prevented from easily deviating from the torsion axis L.

The arm 32 protrudes from one side of the motor holder 31 and extends in a radial direction of the torsion axis L. The outer end 321 of the arm 32 extends into the measuring groove 221 of the extending block 22 of the force sensor 20, and when the motor fixing frame 31 is subjected to a torsion force and intends to rotate relative to the measuring base 10, the outer end 321 abuts against one of the measuring surfaces of the force sensor 20 according to the direction of the torsion force, so as to limit the motor fixing frame 31 from rotating relative to the measuring base 10. That is, when the motor fixing frame 31 receives a torsion force rotating around the torsion axis L, the outer end 321 of the arm 32 abuts against the measuring surface of the force sensor 20, so that the force sensor 20 measures the abutting force of the outer end of the arm 32; the torque force applied to the motor holder 31 can be obtained by multiplying the abutting force by the radial distance (i.e., the moment arm) between the outer end 321 and the torsion axis L. In short, the measuring seat 10, the motor fixing frame 31, the arm 32 and the force sensor 20 are combined together to form a torque sensor, which can measure the torque applied to the motor fixing frame 31.

In other preferred embodiments, the force sensor 20 may also include only one load cell 21, in which case the measuring surface is a side surface of the load cell 21 for measuring the force, and the outer end 321 of the arm 32 directly abuts against the measuring surface of the load cell 21.

The motor 33 is fixed to the motor holder 31, and specifically, fixed inside the motor holder 31. The driving shaft 331 of the motor 33 is aligned with the torsion axis L and rotatably penetrates downward through the bottom of the motor holder 31 and the lower bearing 14 to protrude downward from the bottom plate 11 of the measuring stand 10.

The flexible coupling 40 is connected to the driving shaft 331 of the motor 33 and has a first fixing ring 41 and a second fixing ring 42. The first fixing ring 41 is located at one end of the flexible coupling 40 and is sleeved on the driving shaft 331 of the motor 33. A second stationary ring 42 is located at the other end of the flexible coupling 40. The center line of the second fixed ring 42 and the center line of the first fixed ring 41 may be non-parallel (i.e., the flexible coupling 40 can absorb the offset), or the center line of the second fixed ring 42 and the center line of the first fixed ring 41 may be parallel and offset (i.e., the flexible coupling 40 can absorb the offset). Specifically, the flexible coupling 40 is a disc-type coupling, that is, the flexible coupling 40 has a plurality of fixing rings arranged at intervals, and the fixing rings are connected by elastic steel sheets, so that the fixing rings can slightly displace and swing, and further, the displacement between the elements at the two ends of the coupling can be absorbed.

Referring to fig. 4, 8 and 9, one end of the output shaft 50 is inserted through the second fixing ring 42 of the flexible coupling 40, and the other end is detachably connected to the pivot member a. In this embodiment, after the positioning mechanism M drives the torque testing device 1 to move linearly downward, the output shaft 50 can be connected to the pivot member a; after the positioning mechanism M drives the torque testing device 1 to move linearly upward, the output shaft 50 can be separated from the pivot member a, that is, the connection/separation between the output shaft 50 and the pivot member a can be achieved by a simple linear reciprocating motion, so that the present invention can be easily integrated into an existing automatic production line and quickly measure the next pivot member a of the production line.

The aforementioned wire harness fixing seat 13 is disposed on the measuring seat 10 and located on the torsion axis L, the flexible coupling 40 and the wire harness fixing seat 13 are respectively located on two opposite sides of the motor fixing seat 31 along the extending direction of the torsion axis L, and two wire harnesses (a power supply wire and a coding wire) of the motor 33 are fixed on the wire harness fixing seat 13. Therefore, the pulling force generated by the wire harness of the motor 33 can be close to the torsion axis L as much as possible, so that the torque generated by the pulling force can be reduced, and the torsion interference caused by pulling the wire harness can be reduced to the minimum.

The measuring stand 10 of the present invention is preferably disposed on a positioning mechanism M of an automated production line. When the pivot member a of the production line moves below the positioning mechanism M, the positioning mechanism M drives the torsion testing apparatus 1 to move toward the pivot member a, and the output shaft 50 of the torsion testing apparatus 1 is inserted into the pivot member a (as shown in fig. 9). Then, the motor 33 applies a torsion force to the pivot element a through the flexible coupling 40 and the output shaft 50, the reaction force from the pivot element a makes the motor fixing frame 31 rotate reversely, and makes the outer end 321 of the arm 32 abut against the force sensor 20 on the measuring seat 10, so that the torsion force applied to the pivot element a by the motor 33 (i.e. the torsion force borne by the pivot element a) can be calculated through the measured value of the force sensor 20.

In summary, the force sensor 20 and the pivot element a are respectively disposed at the fixed end (i.e. the body of the motor 33) and the driving end (i.e. the driving shaft 331 of the motor 33) of the motor module 30, so that when measuring the torsion of the pivot element a, the torsion can be measured by connecting the output shaft 50 to the pivot element a. Meanwhile, the connection/disconnection between the output shaft 50 and the pivotal member a can be achieved by a simple mechanical action, such as a linear reciprocating motion, so that the present invention can be easily integrated into an existing automatic production line and rapidly measure the torsion characteristics of the pivotal member a of the production line, and can fully inspect the pivotal member a of the production line. In addition, the flexible coupling 40 can absorb the misalignment between the pivoting member a and the driving shaft 331 of the motor 33, ensuring the accuracy of the torque measurement.

Although the present invention has been described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the present invention.

Claims (6)

1. A torsion testing device for testing a pivoting member, the torsion testing device comprising:

a measuring seat;

a force sensor which is fixedly arranged on the measuring seat and is provided with at least one measuring surface; the force sensor can measure the force abutting against the at least one measuring surface;

a motor module, it locates this measurement seat, this motor module has:

a motor fixing frame which can be rotatablely arranged on the measuring seat by taking a torsion axis as an axis,

an arm rod protruding from one side of the motor fixing frame and extending toward the radial direction of the torsion axis; the outer end of the arm rod selectively abuts against the at least one measuring surface of the force sensor to limit the motor fixing frame from rotating relative to the measuring base;

a motor fixed on the motor fixing frame and having

A driving shaft aligned with the torsion axis and capable of rotatably penetrating through the motor fixing frame and the measuring seat;

a flexible coupling connected to the drive shaft of the motor and having;

a first fixing ring, which is located at one end of the flexible coupling and is sleeved on the driving shaft of the motor;

the second fixing ring is positioned at the other end of the flexible coupling;

the center line of the second fixing ring and the center line of the first fixing ring can be non-parallel, or the center line of the second fixing ring and the center line of the first fixing ring can be parallel and staggered;

one end of the output shaft penetrates through the second fixing ring of the flexible coupling, and the other end of the output shaft is used for being detachably connected with the pivoting piece.

2. The torsion testing device according to claim 1, having

A lower bearing which is arranged between the bottom of the motor fixing frame and the measuring seat and is positioned on the torsion axis so as to enable the motor fixing frame to rotate relative to the measuring seat;

and the upper bearing is arranged between the top of the motor fixing frame and the measuring seat and is positioned on the torsion axis so that the motor fixing frame can rotate relative to the measuring seat.

3. A torsion testing device according to claim 2, wherein the drive shaft of the motor extends downwardly and through the lower bearing; the torque force testing device can enable the output shaft to be connected with the pivoting piece after moving linearly downwards; the torque testing device can make the output shaft separate from the pivoting piece after moving linearly upwards.

4. The torsion testing device according to any one of claims 1 to 3, wherein a harness fixing seat is provided; the wire harness fixing seat is arranged on the measuring seat and is positioned on the torsion axis, the flexible coupling and the wire harness fixing seat are respectively positioned on two opposite sides of the motor fixing frame along the extension direction of the torsion axis, and at least one wire harness of the motor is fixed on the wire harness fixing seat.

5. A torsion testing device according to any of claims 1 to 3, wherein the flexible coupling is a disc type coupling.

6. The torsion testing device according to any one of claims 1 to 3,

the force sensor is provided with a measuring groove; the number of the at least one measuring surface is two, and the two measuring surfaces are two opposite groove walls of the measuring groove respectively;

the outer end of the arm rod of the motor module penetrates through the measuring groove and selectively abuts against one of the measuring surfaces.

Images