TWI416088B - Torque measuring apparatus - Google Patents

Abstract

A torque measuring apparatus includes a platform, a support structure fixed to the platform, a measuring assembly located on the platform for measuring force, a stage superimposed on the platform and supported by the support structure and the measuring assembly, a driving mechanism, and a frame. The driving mechanism includes a shaft pivotably secured to the platform, a motor for driving the shaft to rotate, two first synchronous pulleys fixed to the shaft, two second synchronous pulleys rotatably attached to the platform via pins, two first synchronous belts connected between the two first synchronous pulleys and the two corresponding second synchronous pulleys. The frame includes two girders respectively fixed to the two second synchronous pulleys and a beam connected between the two girders.

Description

Torque detecting device

The present invention relates to a torque detecting device.

Currently, products with hinges (such as notebook computers, folding mobile phones) are widely used in people's daily lives. Typically, such products include a base, an upper cover, and a hinge that pivotally couples the base and the upper cover, and the rotational torque of the hinge is critical to the use of the product and the user experience. Therefore, in order to enhance the competitiveness of the product, the manufacturer will strictly test the torque of the hinge before the product leaves the factory. However, the detection accuracy of the conventional torque detecting device is low, and it is difficult to meet the requirements of the manufacturer.

In view of the above, it is necessary to provide a torque detecting device with high detection accuracy.

A torque detecting device includes a base, a supporting structure fixed on the base, a detecting component for measuring force on the base, a stage supported by the supporting structure and the detecting component, and a driving a mechanism and a swing arm driven by the drive mechanism to reciprocate with respect to the stage, the drive mechanism includes a drive shaft pivotally supported on the base, a motor for driving the drive shaft to rotate, and two fixed to the drive a first timing pulley of the shaft, two second timing pulleys pivotally mounted on the base by the pivot shaft, and two first connecting between the two first timing pulleys and the two second timing pulleys Timing belt The swing arm includes two swing rods respectively fixed to the pivot shafts of the two second timing pulleys and a cross bar connected between the two swing rods, the support structure includes two brackets fixed to the base, each of A weight is disposed on a side of the swinging rod adjacent to the corresponding bracket, and the two weights and the crossbar are respectively located on opposite sides of the two brackets.

The driving mechanism of the torque detecting device of the present invention can drive the two swinging rods of the swing arm to synchronously reciprocate and oscillate relative to the stage, which not only ensures the smooth movement of the two swinging rods, but also ensures that the two swinging rods respectively and the stage The angle is the same, so that the swing arm evenly applies force to the product to be tested, so that the detected torque of the product to be tested is more accurate.

1‧‧‧Torque detecting device

10‧‧‧ machine base

12‧‧‧ cabinet

14‧‧‧Control panel

142‧‧‧Control button

144‧‧‧ display screen

16‧‧‧ top board

20‧‧‧Support structure

22‧‧‧Support board

30‧‧‧stage

32‧‧‧ pivotal department

34‧‧‧ escaping holes

40‧‧‧ drive mechanism

41‧‧‧Motor set

412‧‧‧Motor

414‧‧‧Reducer

42‧‧‧ Third timing pulley

43‧‧‧ drive shaft

44‧‧‧fourth timing pulley

45‧‧‧Second timing belt

46‧‧‧First timing pulley

47‧‧‧ bracket

48‧‧‧Second timing pulley

482‧‧‧ pivot shaft

49‧‧‧First timing belt

50‧‧‧ swing arm

52‧‧‧ pendulum

54‧‧‧crossbar

56‧‧‧weight

60‧‧‧ Limiting device

62‧‧‧ Turntable

64‧‧‧Sense block

66‧‧‧First sensor

70‧‧‧ Angle detection device

72‧‧‧Encoder

74‧‧‧ fifth timing pulley

76‧‧‧third timing belt

80‧‧‧Detection components

82‧‧‧Second sensor

84‧‧‧Carrier

90‧‧‧Note Computer

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a perspective view of a preferred embodiment of a torque detecting device of the present invention.

Fig. 2 is another side view of the torque detecting device after the casing of the stand of Fig. 1 is removed.

Figure 3 is an enlarged view of a portion shown by III in Figure 1.

Figure 4 is an enlarged view of a portion shown by IV in Figure 1.

Fig. 5 is a view showing a state of use of a preferred embodiment of the torque detecting device of the present invention for detecting the torque of a hinge of a notebook computer.

Referring to FIG. 1 and FIG. 2, a preferred embodiment of the torque detecting device 1 of the present invention includes a base 10, a support structure 20 fixed on the top of the base 10, and supported by the support structure 20 and horizontally placed on the base. a top stage 30, a drive mechanism 40 fixed to the base 10, a swing arm 50 fixed to the drive mechanism 40 and driven to reciprocate by the drive mechanism 40, and connected to the drive mechanism 40 for Detecting the maximum swing angle of the swing arm 50 The limiting device 60 is connected to the driving mechanism 40 for detecting the angle of the swinging angle of the swing arm 50 and the detecting component 80 for measuring the force.

The base 10 includes a case 12 and a top plate 16. The support structure 20 is fixed to the rear of the upper surface of the top plate 16. A control panel 14 is disposed in front of the casing 12. The control panel 14 is provided with a plurality of control buttons 142 and a display screen 144 for controlling the operation of the torque detecting device 1 and displaying its operating state.

The support structure 20 includes two support plates 22 that are spaced apart from each other at the rear of the upper surface of the top plate 16.

The two stages of the support plate 30 are respectively disposed on the two sides of the rear support plate 22, and a pivotal portion 32 pivotally disposed on the corresponding support plate 22 is disposed at an intermediate position away from the front portion of the two support plates 22. Hole 34.

With reference to FIG. 3 and FIG. 4 , the driving mechanism 40 includes a transmission shaft 43 pivotally supported on the lower surface of the top plate 16 , and two first timing pulleys 46 respectively fixed to the two ends of the transmission shaft 43 . a bracket 47 on the upper surface of the top plate 16 and respectively located outside the two support plates 22, and two second timing pulleys 48 pivotally mounted on the two brackets 47 by pivot shafts 482, respectively connected to the two first timing pulleys a first timing belt 49 between the two second timing pulleys 48, a motor unit 41 fixed to the lower surface of the top plate 16, a third timing pulley 42 pivotally fixed to the motor unit 41, and a fixing A fourth timing pulley 44 in the middle of the transmission shaft 43 and a second timing belt 45 connected between the third timing pulley 42 and the fourth timing pulley 44. The two second timing pulleys 48 are collinear with the pivot centerlines of the two pivoting portions 32 of the stage 30. The motor pack 41 includes a motor 412 and a speed reducer 414 that are secured together. The third timing pulley 42 is fixed to the center of the speed reducer 414 On the shaft. The rotation speed of the motor 412 is decelerated via the speed reducer 414 and transmitted to the transmission shaft 43 via the second timing belt 45.

The swing arm 50 includes two swing rods 52 respectively fixed to the pivot shafts 482 of the two second timing pulleys 48 and connected between the two swing rods 52 and can be along the two swing rods on one side of the two brackets 47. 52 moving crossbar 54. Each of the swing bars 52 is provided with a weight 56 on the other side of the corresponding bracket 47.

The limiting device 60 includes a turntable 62 fixed to the pivoting shaft 482 of one of the two second timing pulleys 48, an sensing block 64 fixed to the rotating plate 62, and an upper surface fixed to the top plate 16 for pivoting the second A first sensor 66 that synchronizes the position of the pulley 48. The first sensor 66 is configured to sense the sensing block 64 to measure the maximum swing angle that the swing arm 50 reaches.

The angle detecting device 70 includes an encoder 72, two fifth timing pulleys 74, and a third timing belt 76. The encoder 72 is fixed to the lower surface of the top plate 16 corresponding to the other position of the two second timing pulleys 48. The two fifth timing pulleys 74 are respectively fixed to the central axis of the encoder 72 and the two The other pivoting shaft 482 of the second timing pulley 48 is connected between the two fifth timing pulleys 74.

The detecting assembly 80 includes a second sensor 82 for measuring force fixed to the front of the stage 30 and a carrier 84 fixed to the top plate 16. One end of the second sensor 82 is fixed to a position where the lower surface of the stage 30 is close to the escape hole 34, and the second sensor 82 is placed along the extending direction of the escape hole 34 of the stage 30. Suspended directly below the escape hole 34, the other end of the second sensor 82 movably presses the carrier 84. Thus, the detection assembly 80 supports the stage 30 together with the two support plates 22 placed at the rear of the stage 30 and away from the upper surface of the top plate 16 by a certain height.

Referring to FIG. 1 to FIG. 5 simultaneously, the object to be tested, such as the notebook computer 90 of the present embodiment, is placed on the stage 30, and the base of the notebook computer 90 is clamped to the load. The table 30 is attached to the swing arm 50 of the notebook computer 90. Pressing the control button 142 on the control panel 14 causes the motor group 41 of the driving mechanism 40 to operate, and the second timing belt 45 drives the transmission shaft 43 to rotate, so that the first timing pulley on both ends of the transmission shaft 43 The two second timing pulleys 48 are synchronously rotated by the corresponding first timing belt 49, thereby driving the two swing rods 52 of the swing arm 50 to swing synchronously. The two weights 56 allow the swing arm 50 to rotate more easily. At the same time, the two fifth timing pulleys 74 of the angle detecting device 70 are synchronously rotated by the third timing belt 76 with the pivot axis 482 of the corresponding second timing pulley 48, and the swing angle of the swing arm 50 is recorded by the encoder 72. And the swing angle of the swing arm 50 is displayed on the display screen 144 of the control panel 14; and the turntable 62 of the limiting device 60 rotates synchronously with the pivot axis 482 corresponding to the second timing pulley 48, when the swing arm When the switch 50 is turned to the position of the maximum swing angle, the first sensor 66 detects the sensing block 64 that rotates together with the turntable 62, and transmits a signal to the motor group 41. The motor unit 41 is driven by the drive mechanism 40. The swing arm 50 is driven to reverse. Thus, the upper cover of the notebook computer 90 is opened and closed with respect to its base. During the closing of the upper cover of the notebook computer 90 relative to the base thereof, the torque received by the hinge of the notebook computer 90 can be converted into the pressure of the second sensor 82 by the stage 30. . Since the second sensor 82 is horizontally moved relative to the carrier 84 when subjected to a horizontal force, the force measured by the second sensor 82 is vertical.

The second sensor 82 is respectively configured to measure the pressure applied by the stage 30 to the second sensor 82 when the upper cover of the notebook computer 90 is rotated by an external force relative to the base thereof. When the upper cover of the notebook computer 90 is in a vertical state with respect to the base thereof and is not subjected to an external force, the pressure exerted by the stage 30 on the second sensor 82 is measured, and the second sensor 82 is received by measurement. The vertical distance between the force point and the pivot center line of the two pivoting portions 32 of the stage 30, and the difference between the two pressures is multiplied by the vertical distance to calculate the torque of the hinge of the notebook computer 90. . The two-side driving mode of the driving mechanism 40 not only ensures the smooth movement of the two swinging rods 52, but also ensures that the angles of the two swinging rods 52 respectively coincide with the loading stage 30, so that the swinging arm 50 evenly points to the note. The upper cover of the computer 90 is biased, so that the detected torque of the hinge is more accurate.

The torque detecting device 1 can also be used for torque detection of hinges on other products, such as a folding mobile phone.

In other embodiments, the third timing pulley 42 can be directly fixed to the central axis of the motor 412, and the speed is transmitted to the transmission shaft 43 by the second timing belt 45 and the fourth timing pulley 44. Thus, the speed reducer 414 is not needed. The motor 412 can be a low speed motor.

In addition, the motor 412 of the motor unit 41 can be directly fixed to the transmission shaft 43 by a coupling or other connection to drive the transmission shaft 43, so that the third and fourth timing pulleys 42 are not required. 44 and the second timing belt 45.

In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. The above description is only the preferred embodiment of the present invention, and equivalent modifications or variations made by those skilled in the art will be included in the following claims.

16‧‧‧ top board

41‧‧‧Motor set

412‧‧‧Motor

414‧‧‧Reducer

42‧‧‧ Third timing pulley

43‧‧‧ drive shaft

44‧‧‧fourth timing pulley

45‧‧‧Second timing belt

46‧‧‧First timing pulley

50‧‧‧ swing arm

72‧‧‧Encoder

74‧‧‧ fifth timing pulley

76‧‧‧third timing belt

80‧‧‧Detection components

82‧‧‧Second sensor

84‧‧‧Carrier

Claims (11)

A torque detecting device includes a base, a supporting structure fixed on the base, a detecting component for measuring force on the base, a stage supported by the supporting structure and the detecting component, and a driving a mechanism and a swing arm driven by the drive mechanism to reciprocate with respect to the stage, the drive mechanism includes a drive shaft pivotally supported on the base, a motor for driving the drive shaft to rotate, and two fixed to the drive a first timing pulley of the shaft, two second timing pulleys pivotally mounted on the base by the pivot shaft, and two first connecting between the two first timing pulleys and the two second timing pulleys a timing belt, the swing arm includes two swing rods respectively fixed to the pivot shafts of the two second timing pulleys, and a cross rod connected between the two swing rods, the support structure includes two brackets fixed to the base Each of the swinging rods is provided with a counterweight on a side close to the corresponding bracket, and the two weights and the crossbar are respectively located on opposite sides of the two brackets. The torque detecting device of claim 1, wherein the driving mechanism further comprises a third timing pulley driven by the motor, fixed to the transmission shaft and located between the two first timing pulleys a fourth timing pulley, a second timing belt connected between the third timing pulley and the fourth timing pulley. The torque detecting device of claim 2, wherein the driving mechanism further comprises a speed reducer fixedly coupled to the motor, the third timing pulley being pivoted to the speed reducer. The torque detecting device of claim 1, wherein the supporting structure comprises two supporting plates on both sides of the loading platform, and the loading platform is respectively provided with a pivoting pivoting on the two sides of the corresponding supporting plate. unit. The torque detecting device of claim 4, wherein the two brackets correspond to the two supporting plates, wherein the two second timing pulleys are respectively pivoted on the two brackets by a pivot shaft. The torque detecting device of claim 5, wherein the pivot centerlines of the two second timing pulleys are collinear with the pivot centerlines of the two pivot portions. The torque detecting device according to claim 1, further comprising a limiting device for detecting a maximum swing angle of the swing arm. The torque detecting device of claim 7, wherein the limiting device comprises a turntable fixed to a pivot axis of one of the two second timing pulleys, an induction block held on the turntable, and for sensing The sensing block is configured to measure a first sensor of the maximum swing angle reached by the swing arm. The torque detecting device of claim 8, further comprising angle detecting means for detecting a swing angle of the swing arm. The torque detecting device of claim 9, wherein the angle detecting device comprises an encoder fixed to the base, two fifth timing pulleys, and a third connected between the two fifth timing pulleys. The timing belts are respectively fixed to the central axis of the encoder and the pivot axis of the other of the two second timing pulleys. The torque detecting device of claim 1, wherein the stage is provided with a relief hole at a position away from the support structure, the detecting component includes a second sensor for measuring force and is fixed on the a carrier of the base, one end of the second sensor is fixed to the lower surface of the stage, and the second sensor is placed along the extending direction of the escape hole and is suspended directly below the avoidance hole. The other end of the second sensor movably presses the carrier.