TWI693385B - Dynamic unbalance detection module and dynamic unbalance detection device using the detection module - Google Patents

Abstract

The invention describes a dynamic unbalance detection module, the structure of which includes an elastic metal sheet and at least one strain gauge. The elastic metal sheet has a first fixed end and a second fixed end oppositely arranged. The first fixed end can be fixed and the second fixed end is used to fix and support the rotating mechanism. The elastic metal sheet can be It is elastically deformed by the horizontal swing of the rotating mechanism. The strain gauge is provided on one side of the elastic metal sheet and can detect the deformation amount of the elastic metal sheet. Through the structural design of the dynamic unbalance detection described above, it can be used with a rotating mechanism and effectively measure the dynamic unbalance of the test object provided on the rotating mechanism.

Description

Dynamic unbalance detection module and dynamic unbalance detection device using the detection module

The invention relates to a dynamic unbalance detection module and a dynamic unbalance detection device using the detection module, which can detect the dynamic unbalance amount of the test object.

Most of the mechanical components that can be driven to rotate (such as cutter bars, pulleys, gears, etc.), the structural design needs to take into account the dynamic imbalance during rotation, and through proper compensation and correction, it can effectively reduce the mechanical components when rotating. Unnecessary vibration or abnormal sound.

In order to effectively measure the dynamic unbalance of mechanical components and to facilitate subsequent correction and compensation of mechanical components, traditionally, dynamic balancing machines are used to detect dynamic unbalance. However, the traditional dynamic balance machine's dynamic unbalance detection module uses a force gauge (piezoelectric quartz crystal) or an acceleration gauge to detect. It is well known that the price of the force gauge is quite expensive, resulting in the overall dynamic balance machine selling price The high level makes the traditional balancing machine less competitive in price in the market.

In view of this, one of the purposes of the present invention is to improve the lack of the existing technology, and then propose a dynamic imbalance detection module, which can help detect the dynamic imbalance of the object to be tested, and has a competitive advantage in price .

The reason is that, according to a dynamic unbalance detection module provided in the following embodiments, it can be used with a rotating mechanism and used to measure a dynamic unbalance amount of an object to be measured provided on the rotating mechanism. It includes an elastic metal sheet and at least one strain gauge. The elastic metal sheet has a first fixed end and a second fixed end oppositely arranged. The first fixed end can be fixed and the second fixed end is used to fix and support the rotating mechanism. The elastic metal sheet can be It is elastically deformed by the horizontal swing of the rotating mechanism. The strain gauge is provided on one side of the elastic metal sheet and can detect the deformation amount of the elastic metal sheet.

Through the structural design of the above-mentioned dynamic unbalance detection module, when the user rotates the test object through the rotating mechanism to detect the dynamic unbalance of the test object, if the test object is turned during the process of rotating the test object, The unbalanced amount of its own causes the horizontal swing of the rotating mechanism. The force of the horizontal swing of the rotating mechanism will be transmitted to the elastic metal sheet. Since the first fixed end is fixed, the above force will cause the elastic deformation of the elastic metal sheet. In this way, the strain gauge can detect the deformation amount of the elastic metal sheet. After this deformation amount is calibrated and matched with the actual rotation angle of the rotating mechanism, the dynamic unbalance of the test object can be calculated. The above-mentioned dynamic imbalance detection module uses relatively low unit price elastic metal sheets and strain gauges, without using expensive force gauges or acceleration gauges, and its overall selling price is relatively low and has a competitive advantage in price.

In one aspect, the elastic metal sheet is rectangular in structure and has a centerline. The first fixed end and the second fixed end are located on two sides of the centerline, respectively. Deformation is the largest. Setting the strain gauge on the center line can detect the deformation of the elastic metal sheet more effectively.

In another aspect, the number of strain gauges can be two, and the two strain gauges can be respectively disposed on two opposite sides of the elastic metal sheet, so that the deformation of the elastic metal sheet can be detected more accurately.

In another aspect, a plurality of hollow holes can also be formed on the center line of the elastic strain gauge by drilling, for example, to increase the deformation of the elastic metal sheet on the center line. In one of the cases, two hollow holes can be selected and the strain gauge is arranged between the two hollow holes.

In another aspect, the strain gauge can be fixed to the elastic metal sheet by means of locking or adhesion, but the invention is not limited thereto.

In another aspect, the following embodiment also illustrates a dynamic unbalance detection device for detecting a dynamic unbalance amount of an object to be measured. The dynamic unbalance detection device includes: a base, a rotating mechanism and a dynamic Unbalance detection module. Wherein, the rotating mechanism includes a rotating member and a fixing member. The fixing member is hollow. The rotating member is driven and rotatably disposed in the fixing member. A fixing seat is provided in the center of the rotating member to fix the object to be measured. The dynamic imbalance detection device includes an elastic metal sheet and at least one strain gauge. The elastic metal sheet has a first fixed end and a second fixed end oppositely disposed. The first fixed end is fixedly mounted on the base, The two fixed ends are fixed on the fixing member of the rotating mechanism and support the rotating mechanism. The elastic metal sheet can be elastically deformed by the horizontal swing of the rotating mechanism. The at least one strain gauge is provided on one side of the elastic metal sheet to detect the deformation amount of the elastic metal sheet.

In another aspect, the rotating mechanism further includes a motor and a belt. The motor has a power output shaft and a first pulley. The first pulley is provided on the power output shaft. The rotating member also has a rotating shaft, and a second pulley is sleeved on the rotating shaft. The belt is connected to the first and second pulleys, so that the motor can drive the rotating member to rotate through the belt.

In order to help measure the dynamic imbalance in the three-dimensional direction, two elastic metal sheets and two strain gauges can be used, and the two strain gauges are respectively provided on the two elastic metal sheets. The two elastic metal sheets are fixed between the base and the fixing member, and the two elastic metal sheets are arranged at a vertical interval and located on the same virtual plane.

On the other hand, in order to calculate the dynamic unbalance of the object to be measured, an angle detector can be selected on the fixed part of the rotating mechanism, and the angle detector corresponds to the rotating part to detect the rotating angle of the rotating part . The angle detector can be an encoder, and it can also use an interrupt switch or a photoelectric switch to measure the rotation angle of the rotating member, but the invention is not limited to this.

In another aspect, the base is hollow, and the rotating mechanism is located in the base, and the first fixed end of the elastic metal sheet is fixed to the inner wall of the base. In one of the cases, the detection device further includes at least two spring modules, the at least two spring modules are disposed at an equal angle on the inner wall of the base and protrude toward the rotating mechanism, thereby limiting the maximum horizontal swing range of the rotating mechanism.

The following describes the technical content and features of the present invention in detail with reference to several embodiments and drawings. The "upper", "lower", "inner", "outer", "top", Directional adjectives such as "bottom" are only illustrative descriptions based on the normal direction of use, and are not intended to limit the scope of the claim.

In order to explain the technical features of the present invention in detail, the following embodiments are described in conjunction with the drawings as follows, in which:

As shown in FIGS. 1 and 2, a dynamic unbalance detection device 1 provided by an embodiment is used to detect a dynamic unbalance amount of a test object (not shown). The dynamic unbalance detection device 1 includes a The base 10, a rotating mechanism 20 and two-motion unbalance detection modules 30A, 30B.

As shown in FIGS. 1 to 3, the base 10 is roughly a hollow square column in structure, and the base 10 has a first wall 11 and a second wall 12 that are oppositely arranged and connected to the first wall 11 A third wall 13 with the second wall 12. The first wall 11 and the second wall 12 are respectively provided with two sets of spring modules 50A, 50B and two sets of spring modules 50C, 50D. The spring modules 50A, 50B are fixed to the inner wall of the first wall 11, The spring modules 50C, 50D are fixed to the inner wall of the second wall 12, the spring modules 50A, 50B and the spring modules 50C, 50D are arranged at equal angles, and the spring modules 50A-50D are convex toward the base 10 Inwardly and toward the rotating mechanism 20, thereby limiting the maximum horizontal swing range of the rotating mechanism 20. The inner wall of the third wall 13 is further provided with a set of metal sheet clamping seats 14, the metal sheet clamping seat 14 has a first clamping member 141 and a second clamping member 142, the first and second clamping members 141, 142 The screws S can be moved closer to or farther away from each other.

Please refer to Figure 2 and Figure 4. The rotating mechanism 20 includes a rotating member 21 and a fixing member 22. The fixing member 22 is a hollow cylindrical structure. The outer peripheral surface is also provided with a set of metal sheet clamping seats 23. The structure of the metal sheet clamping seat 23 and the metal The sheet clamping base 14 is the same, and also has a first clamping member 231 and a second clamping member 232, so that the first and second clamping members 231, 232 can be close to or away from each other by way of the screw S locking . The rotating member 21 is rotatably and coaxially disposed in the fixing member 22, and a fixing seat 212 is provided in the center of the top surface of the rotating member 21 to fix the object to be measured. In order to drive the rotating member 21 to rotate, in this embodiment, the rotating mechanism 20 further includes a motor 24 and a belt 25 (as shown in FIG. 4). The motor 24 has a power output shaft 241 and a first pulley 242. The first The pulley 242 is sleeved on the power output shaft 241. The rotating member 21 also has a rotating shaft 211, which protrudes downward from the fixing member 22 (the fixing member 22 is provided with holes for the rotating shaft 211 to pass through), and a second pulley 213 is sleeved on the rotating shaft 211, and the belt 25 is connected The first and second pulleys 242 and 213 enable the motor 24 to drive the rotating member 21 to rotate through the belt 25 when the motor 24 operates.

Please refer to Figure 2, Figure 5 and Figure 6. This embodiment uses two sets of dynamic unbalance detection modules 30A, 30B. Each set of dynamic unbalance detection modules 30A, 30B includes an elastic metal sheet 31 and a strain gauge 32, and the above two sets of dynamic unbalance detection The modules 30A and 30B are arranged vertically and spaced from each other and are located on the same and virtual plane. That is, the elastic metal sheets 31 of the two sets of dynamic unbalance detection modules 30A and 30B are arranged linearly. Since the structures of the above two sets of dynamic unbalance detection modules 30A and 30B are the same, only the structural design of one set of dynamic unbalance detection modules 30A will be described below, and the other set of dynamic unbalance detection modules 30B may be based on And so on.

As shown in FIGS. 5 and 6, the elastic metal sheet 31 is in the shape of a rectangular sheet with a center line C, and a first fixed end 311 and a second fixed end 312 opposite to the center line C are provided , Both the first fixed end 311 and the second fixed end 312 are provided with a number of positioning holes 313 (in this embodiment, two positioning holes 313, the number of positioning holes 313 can be adjusted according to the actual situation), and the center line C There are also two hollow holes 314 spaced up and down. The first fixed end 311 of the elastic metal sheet 31 is clamped by the metal sheet clamping seat 14 (see FIG. 2 ), and one side of the elastic metal sheet 31 is fixed to the base 10 by the metal sheet clamping seat 14 The inner wall of the third wall 13. The second fixed end 312 is clamped by the metal sheet clamping base 23, and the other side of the elastic metal sheet 31 is fixed to the rotating member 20 by the metal sheet clamping base 23. Therefore, as shown in FIG. 4, the entire rotating mechanism 20 is supported by the third wall 13 of the base 10 through the above-mentioned two sets of dynamic unbalance detection modules 30A, 30B. Returning to FIG. 5, the strain gauge 32 is adhered to the side of the elastic metal sheet 31. The strain gauge 32 is located on the center line C and between the two hollow holes 314. The strain gauge 32 is provided with a plurality of wires 321 for signal input and output. When the elastic metal sheet 31 is elastically deformed by the horizontal swing of the rotating mechanism 20, the strain gauge 32 can generate a change in the resistance value, so as to detect the tiny deformation amount of the elastic metal sheet 31.

In order to help the subsequent calculation of the dynamic imbalance of the object to be measured, an angle detector 40 is also used in this embodiment. The angle detector 40 in this embodiment is an encoder, which is disposed on the fixing member 22 and Corresponding to the rotating shaft 211 of the rotating member 21, the rotating speed and the rotating angle of the rotating member 21 are detected.

Through the design of the dynamic unbalance detection device 1 described above, when the user wants to measure the dynamic unbalance of the test object, the user can fix the test object on the fixing seat 212 of the rotating member 21, and start the motor 24 to drive the rotation The member 21 rotates to define the absolute zero position of the rotor 21, and the rotation speed and rotation angle of the rotor 21 are detected by the angle detector 40. During the rotation of the rotating member 21, if the structure of the object to be measured has a dynamic unbalance, this dynamic unbalance will cause the horizontal swing of the rotating mechanism 20, and the force of the horizontal swing of the rotating mechanism 20 will be transmitted to the elastic metal The sheet 31 also causes elastic deformation of the elastic metal sheet 31. At this time, the strain gauge 32 can detect the deformation of the elastic metal sheet 31 and produce a change in resistance value, which can be matched with the Wheatstone bridge circuit, amplifier circuit, analog/digital conversion circuit, phase-locked loop circuit, and further The signal is normalized, filtered and analyzed, and the rotation angle obtained by the angle detector 40 is used to calculate the dynamic unbalance of the object to be measured, so that the user can compensate the dynamic unbalance of the object to be measured later.

In summary, the dynamic imbalance detection device 1 of the above embodiment can indeed use relatively low unit price detection modules 30A, 30B without using expensive force gauges or acceleration gauges, but it can also effectively help detect the test The amount of dynamic imbalance of things. The overall cost of the dynamic imbalance detection device 1 is expected to be reduced, so that it has a competitive advantage in price, and the above are the characteristics of the present invention.

The embodiments listed in the above paragraph are used to clarify the possible implementation forms of this embodiment. The present invention is not limited to the above-exemplified implementation forms. Any modification within the scope of the ideas disclosed in the present invention And changes should still fall within the scope of the present invention.

1: Detection device 10: base 11: The first wall 12: Second wall 13: Third wall 14: Metal sheet clamping seat 141: First clamping piece 142: Second clamping piece 20: Rotating mechanism 21: Rotating parts 211: shaft 212: fixed seat 213: Second pulley 22: fixings 23: Metal sheet clamping seat 231: First clamping piece 232: second clamping piece 24: motor 241: PTO shaft 242: the first pulley 25: belt 30A, 30B: detection module 31: Elastic metal sheet 311: first fixed end 312: Second fixed end 313: Positioning hole 314: Hollow hole 32: strain gauge 321: Wire 40: Angle detector 50A-50D: spring module C: Centerline S: screw

The detailed structure, characteristics or usage of the dynamic imbalance detection module will be described in the following embodiments. However, it should be understood that the embodiments and drawings to be described below are only for illustrative purposes. It should not be used to limit the scope of patent applications for this invention, including:

1 is a perspective view of a dynamic unbalance detection device of an embodiment; FIG. 2 is similar to FIG. 1, omitting the frame and belt of the drawing; Figure 3 is a top view of Figure 1; FIG. 4 is a side view of FIG. 2 with the frame of the drawing omitted; 5 is a perspective view of an elastic metal sheet according to an embodiment; and 6 is a plan view of FIG. 5.

1: Detection device

10: base

11: The first wall

12: Second wall

13: Third wall

20: Rotating mechanism

50A-50B: spring module

Claims (12)

A dynamic unbalance detection module can be used with a rotating mechanism and used to help measure a dynamic unbalance of an object to be measured provided on the rotating mechanism. The dynamic unbalance detection module includes: An elastic metal sheet having a first fixed end and a second fixed end oppositely arranged, the first fixed end can be fixed, and the second fixed end is used to fix and support the rotating mechanism, The elastic metal sheet can be elastically deformed by the horizontal swing of the rotating mechanism; At least one strain gauge is disposed on a side of the elastic metal sheet to detect the deformation amount of the elastic metal sheet. The dynamic imbalance detection module according to claim 1, wherein the elastic metal sheet is rectangular and has a center line, and the first fixed end and the second fixed end are respectively located on two sides of the center line , And the strain gauge is set on the center line. The dynamic imbalance detection module according to claim 1, wherein the at least one strain gauge is two strain gauges, and the two strain gauges are respectively disposed on two opposite sides of the elastic metal sheet. The dynamic imbalance detection module according to claim 1, wherein the center line is also provided with a plurality of hollow holes. The dynamic imbalance detection module according to claim 4, wherein the hollow holes are two hollow holes, the at least one strain gauge is a strain gauge, and the strain gauge is disposed between the two hollow holes. The dynamic imbalance detection module according to claim 1, wherein the at least one strain gauge is adhered to the side of the elastic metal sheet. A dynamic unbalance detection device is used to help measure a dynamic unbalance of an object to be measured. The dynamic unbalance detection device includes: A stand A rotating mechanism includes a rotating member and a fixing member. The fixing member is hollow. The rotating member can be driven and rotatably disposed in the fixing member. A fixing seat is provided in the center of the rotating member for fixing The test object; A dynamic imbalance detection module includes an elastic metal sheet and at least one strain gauge, the elastic metal sheet has a first fixed end and a second fixed end oppositely arranged, the first fixed end is fixedly mounted on In the base, the second fixed end portion is fixed to the fixing member of the rotating mechanism and supports the rotating mechanism, the elastic metal sheet can be elastically deformed by the horizontal swing of the rotating mechanism, and the at least one strain gauge is located at One side of the elastic metal sheet detects the deformation amount of the elastic metal sheet. The dynamic unbalance detection device according to claim 7, wherein the rotating mechanism further includes a motor and a belt, the motor has a power output shaft and a first pulley, the first pulley is provided on the power output shaft, The rotating member also has a rotating shaft, and a second pulley is sleeved on the rotating shaft, and the belt connects the first pulley and the second pulley. The dynamic unbalance detection device according to claim 7, wherein the dynamic unbalance detection module includes two elastic metal sheets and two strain gauges, the two strain gauges are respectively disposed on the two elastic metal sheets, and the two elastic The metal sheets are all fixed between the base and the fixing member, and the two elastic metal sheets are arranged at a vertical distance from each other and are located on the same virtual plane. The dynamic unbalance detection device according to claim 7, further comprising an angle detector, the angle detector is provided on the fixed member or the base and corresponds to the rotating member to detect the rotating angle of the rotating member, The angle detector is an encoder. The dynamic unbalance detection device according to claim 7, wherein the base is hollow, and the rotating mechanism is located in the base, and the first fixed end of the elastic metal sheet is fixed to the base The inner wall. The dynamic unbalance detection device according to claim 11, further comprising at least two spring modules, the at least two spring modules are disposed at an equal angle on the inner wall of the machine base and directed toward the rotating mechanism.

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