KR102578077B1 - Performance test apparatus of wave generator bearing - Google Patents

Abstract

A performance testing device for a wave generator bearing of the present invention includes a drive motor that rotates a rotating shaft rotatably mounted on a support; A torque sensor that measures torque of the rotation shaft; and a bearing load device module installed on one side of the support and measuring performance including radial deformation of the wave generator bearing coupled to the rotation shaft and rotated.

Description

Performance test apparatus of wave generator bearing}

The present invention relates to a performance test device for a wave generator bearing, and more specifically, to improve the quality and performance of the wave generator by measuring and analyzing the radial deformation, vibration, noise, temperature, etc. of the wave generator bearing. This relates to a performance test device for wave generator bearings.

In general, strain wave reducers (aka harmonic reducers) are used in various fields such as industrial robots, humanoid robots, semiconductor (wafer) manufacturing equipment, electronic component insertion equipment, ceramic forming equipment, optical disk manufacturing equipment, medical devices, and NC (Numerical Control) lathes. It is a reducer widely used in mechanical devices, and is characterized by being small and light, making low noise when rotating gears, achieving a high-precision reduction ratio, and having excellent power transmission efficiency.

Strain wave reducers basically include a wave generator, flexspline, and circular spline. In the wave generator, a ball bearing is assembled on the outer peripheral surface of an oval-shaped cam to which an input shaft is connected, and a flexspline is press-fitted to the outer ring of the ball bearing. The flexspline is a circular thin metal elastic body with a first tooth (gear tooth) formed on one outer peripheral surface, and the circular spline has a second tooth formed on the inner peripheral surface corresponding to the first tooth of the flexspline.

In this strain wave reducer, power is transmitted in the following order: the input shaft, the wave generator connected to the input shaft, the flexspline, the circular spline engaged with the flexspline, and the output shaft connected to the circular spline. In other words, when the wave generator coupled with the input shaft rotates clockwise, the flexspline gradually undergoes elastic deformation, and some of the first teeth of the flexspline are combined with some of the second teeth of the circular spline to transmit power. . At this time, a reducer with a large reduction ratio can be implemented due to the difference between the dimensions of the first teeth formed on the outer peripheral surface of the flexspline and the dimensions of the second teeth of the circular spline.

As a prior art regarding a testing device for a harmonic reducer, “Stiffness Tester for Harmonic Reducer” is disclosed in Registered Patent Publication No. 10-0926574. The disclosed tester can perform an input/output angle transfer test of the harmonic reducer and a strength test of the overall reducer. This rigidity tester is structured to apply a load through front and rear horizontal rails and check its value using a load cell.

However, the disclosed prior art relates to a rigidity tester for the entire harmonic reducer in which a wave generator, flexline, and circular spline are assembled, and is a wave generator that can measure the amount of deformation of the outer ring by rotating the cam of the wave generator with a displacement measurement sensor. A device for measuring the deformation amount of a generator has not been disclosed.

Registered Patent Publication No. 10-0926574 “Stiffness tester for harmonic reducer”

The purpose of the present invention is to provide a performance test device for a wave generator bearing that can improve the quality and performance of the wave generator by measuring and analyzing the radial deformation, vibration, noise, temperature, etc. of the wave generator bearing.

A performance testing device for a wave generator bearing of the present invention to achieve the above object includes a drive motor that rotates a rotary shaft rotatably mounted on a support; A torque sensor that measures torque of the rotation shaft; and a bearing load device module installed on one side of the support and measuring performance including radial deformation of the wave generator bearing coupled to the rotation shaft and rotated.

The support includes a first base bed on which the drive motor, torque sensor, and rotation axis are each mounted by brackets on the upper surface, and a second base bed provided with a horizontal guide rail on the upper surface to slideably support the bearing load device module. It can be included.

The bearing load device module is slidably mounted on a slide bed slidably mounted on the horizontal guide rail, a vertical frame coupled to the slide bed, and a vertical guide rail provided on the vertical frame to support the wave generator bearing. It may include a lifting bracket that presses the outer peripheral surface of the vertical frame, a load cylinder that is mounted on the upper part of the vertical frame and presses the lifting bracket, and a distance sensor that is mounted on the lifting bracket and measures the amount of radial deformation of the wave generator bearing.

The wave generator bearing may be mounted on a rotating shaft connected between a first bearing bracket mounted on one end of the first base bed and a second bearing bracket mounted on the upper surface of the slide bed.

The load cylinder is a pneumatic cylinder operated by air pressure, and the bearing load device module includes a pressure valve that controls the pressure of air supplied to the load cylinder and a direction that controls the flow direction of air supplied to the load cylinder. It may further include a valve.

The bearing load device module further includes a force sensor mounted on the upper surface of the lifting bracket, and the load cylinder can selectively press the force sensor.

The lifting bracket includes an upper bracket that is slidably mounted on the vertical guide rail, a lower bracket that is slidably mounted on the vertical guide rail and whose separation distance from the upper bracket is limited by a guide bar coupled to the upper bracket, and , It may include at least one load spring coupled between the upper bracket and the lower bracket.

The distance sensor is a laser distance sensor mounted on the upper bracket, and a reflective member that reflects the laser of the distance sensor may be mounted on the lower bracket to enable height adjustment.

The lifting bracket may be mounted on the vertical frame to be capable of being lifted up and down, and may further include a clamp block that fixes the upper bracket so that it does not rise after the lower bracket is lowered to a position where the wave generator bearing is pressed.

It may further include a vibration sensor mounted on one side of the second bearing bracket to measure vibration of the wave generator bearing, and a noise sensor mounted on a lower part of the first bearing bracket to measure noise of the wave generator bearing. .

The lifting bracket further includes a load bar coupled to the lower surface of the lower bracket and in contact with the wave generator bearing, and a temperature sensor attached to the load bar and measuring the temperature of the load bar heated as the wave generator bearing rotates. It may further include.

It may further include a temperature sensor that is installed at a predetermined distance from the wave generator bearing and measures the temperature by scanning a laser toward the wave generator bearing.

According to the performance test device for the wave generator bearing of the present invention described above, it is possible to improve the quality and performance of the wave generator by measuring and analyzing the radial deformation, vibration, noise, temperature, etc. of the wave generator bearing.

Figure 1 is a perspective view showing a performance test device for a wave generator bearing according to an embodiment of the present invention.
Figure 2 is a front view showing a performance test device for a wave generator bearing.
FIG. 3 is a front view showing mounting the wave generator bearing in FIG. 2.
Figure 4 is a cross-sectional view showing the wave generator bearing and its mounting state.
Figure 5 is a graph showing the displacement and deformation amount of the wave generator bearing.
Figure 6 is an upward perspective view showing a bearing load device module according to an embodiment of the present invention.
Figure 7 is a downward perspective view showing a bearing load device module according to an embodiment of the present invention.
Figure 8 is a front view showing a bearing load device module according to an embodiment of the present invention.
Figure 9 is a left perspective view showing a performance test device for a wave generator bearing.
Figure 10 is a right side view showing the bearing load device module.
Figure 11 is a block diagram showing the control configuration of a wave generator bearing performance test device.
Figure 12 is a front view showing an example of installation of the temperature sensor of the present invention.
Figure 13 is a cut-away perspective view showing a wave generator bearing, a vibration sensor, and a noise sensor installed in the first and second bearing brackets.
Figure 14 is a front view of Figure 13.
Figures 15 and 16 are graphs showing vibration data measured by a vibration sensor.

Since the present invention can be modified in various ways and can have various embodiments, specific embodiments will be exemplified and explained in detail in the detailed description. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all transformations, equivalents, and substitutes included in the spirit and technical scope of the present invention.

The terms used in the present invention are only used to describe specific embodiments and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In the present invention, terms such as 'include' or 'have' are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other features. It should be understood that this does not exclude in advance the possibility of the existence or addition of elements, numbers, steps, operations, components, parts, or combinations thereof.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. At this time, note that in the attached drawings, like components are indicated by the same symbols whenever possible. Additionally, detailed descriptions of well-known functions and configurations that may obscure the gist of the present invention will be omitted. For the same reason, some components are exaggerated, omitted, or schematically shown in the accompanying drawings.

Figure 1 is a perspective view showing a performance test device for a wave generator bearing according to an embodiment of the present invention, Figure 2 is a front view showing a performance test device for a wave generator bearing, and Figure 3 is a device for mounting the wave generator bearing in Figure 2. It is a front view showing this, and Figure 4 is a cross-sectional view showing the wave generator bearing and its mounting state.

First, the harmonic reducer (strain wave reducer) is composed of a wave generator, flexspline, and circular spline. As shown in FIG. 4, the wave generator 10 includes an oval-shaped cam portion 22 to which the input shaft 20 is connected, and a ball bearing coupled to the outer peripheral surface of the cam portion. A ball bearing has a plurality of balls 40 arranged between the inner ring 30 and the outer ring 50. When the oval-shaped cam portion 22 is inserted and combined into the inner ring 30, the circular inner ring 30 and the outer ring 50 are transformed into an oval shape.

The performance test device 100 of the wave generator bearing of the present invention includes a drive motor 150 that rotates a rotation shaft 160 rotatably mounted on the support 110, and a torque sensor that measures the torque of the rotation shaft 160 ( 170), and a bearing load device module 200 that is installed on one side of the support 110 and measures performance including the radial deformation amount of the wave generator bearing 10 coupled to the rotation shaft 160 and rotated. .

The support 110 is formed in the form of a rectangular table of a predetermined height, and is provided with a plurality of wheels 112 at the bottom of the support 110 so that it can be movably installed. In addition, a plurality of fixing brackets 113 may be coupled to the lower part of the support 110 to secure the support 110 to the floor. The support 110 may be formed to have different heights at the upper end of one side and the upper end of the other side. A first base bed 120 in the shape of a rectangular plate may be provided on one upper side of the support 110, and a second base bed 130 in the shape of a rectangular plate may be provided on the other upper side. The upper surface of the second base bed 130 may be disposed lower than the upper surface of the first base bed 120. Two pairs of mounting grooves 122 extending left and right may be formed on the upper surface of the first base bed 120.

The drive motor 150 is a servomotor capable of controlling its rotational speed and torque, and can be mounted horizontally on a bracket that is fastened and fixed to the first base bed 120 of the support 110. The driving motor 150 preferably includes an encoder 152 that measures its rotational speed.

The rotation shaft 160 may be rotatably mounted on a plurality of support brackets 180 that are fastened and fixed to the first base bed 120. The rotation shaft 160 may be rotated by being shaft-coupled with the drive shaft of the drive motor 150.

The torque sensor 170 is mounted on the rotation shaft 160 and can measure the torque applied to the rotation shaft 160 rotated by the drive motor 150 in real time. The torque sensor 170 may be supported by a support bracket fastened to the upper surface of the first base bed 120.

The bearing load device module 200 is slidably installed on the second base bed 130, and can measure performance, such as the radial deformation amount, of the wave generator bearing 10 that is coupled to the rotation shaft 160 and rotated. .

As described above, the support 110 includes a first base bed 120 on which a drive motor 150, a torque sensor 170, and a rotation axis 160 are each mounted on the upper surface by a bracket, and a bearing load device module 200. ) may include a second base bed 130 that slideably supports the base bed 130.

Each bracket of the drive motor 150, torque sensor 170, and rotation shaft 160 may be fastened to two pairs of mounting grooves 122 formed on the first base bed 120 with a plurality of bolts.

Figure 5(a) is a displacement graph showing the change in the radial displacement of the outer peripheral surface of the wave generator bearing due to the cam portion, and Figure 5(b) is a deformation graph showing the change in the amount of deformation of the outer ring due to the ball of the wave generator bearing. 5(c) is a composite graph showing changes in displacement and deformation.

As shown in FIG. 5(a), the displacement graph represents the change in displacement according to the geometric shape of the rotated oval cam portion 22, and may appear as a sine curve of a trigonometric function.

As shown in FIG. 5(b), the deformation amount graph represents the deformation amount due to vibration or distortion of the balls 40 and the outer ring 50, which constitute the rotating wave generator bearing 10, due to load and external force. You can. The deformation graph is smaller than the displacement graph and may appear in the form of an irregular curve.

As shown in Figure 5(c), the composite graph is a composite of changes in displacement and deformation. In the performance test device 100 of the present invention, displacement and deformation can be simultaneously measured and displayed as a composite graph in FIG. 5(c). By analyzing these synthetic graphs, the performance and lifespan of the wave generator can be checked and improved.

Figure 6 is an upward perspective view showing a bearing load device module according to an embodiment of the present invention, Figure 7 is a downward perspective view showing a bearing load device module according to an embodiment of the present invention, and Figure 8 is an embodiment of the present invention. It is a front view showing a bearing load device module according to an example, Figure 9 is a left perspective view showing a performance test device for a wave generator bearing, and Figure 10 is a right side view showing a bearing load device module.

The bearing load device module 200 includes a slide bed 210 slidably mounted on the horizontal guide rail 140, a vertical frame 220 coupled to the slide bed, and a vertical guide rail 230 provided on the vertical frame. ) is slidably mounted on the lifting bracket 250 to press the outer peripheral surface of the wave generator bearing 10, a load cylinder 270 is mounted on the upper part of the vertical frame and presses the lifting bracket, and is mounted on the lifting bracket to press the wave generator bearing. It may include a distance sensor 320 that measures the amount of radial deformation.

A pair of horizontal guide rails 140 may be provided on the upper surface of the second base bed 130, which is disposed at a lower height than the first base bed 120. The slide bed 210, which constitutes the base plate of the bearing load device module 200, can be mounted on a pair of horizontal guide rails 140 to be slidable in the left and right directions. For this purpose, the slide bed 210 may be provided with two pairs of sliders 212 mounted on the lower surface to surround a pair of horizontal guide rails 140.

And, as shown in FIGS. 1 to 3 and 9, the slide bed 210 is provided with a tightening lever 215 so that it can be fixed in that position after sliding on the pair of horizontal guide rails 140. You can. The tightening lever 215 is installed through a pair of guide slots formed through the slide bed 210, and its lower end may be screwed to a fastening part coupled to the second base bed 130. When the tightening lever 215 is turned and tightened, the press rib in the middle part presses the slide bed 210, thereby fixing the slide bed 210 so that it does not move from its position.

The vertical frame 220 has the shape of a rectangular plate that is approximately vertically elongated, and can be coupled to the slide bed 210 by a plurality of bolts. For this purpose, a plurality of fastening holes penetrating upward and downward may be formed in the slide bed 210 and the vertical frame 220.

As shown in FIGS. 6 and 7, a pair of vertical guide rails 230 may be coupled to one side of the vertical frame 220. The lifting bracket 250 is provided with a plurality of sliders 251 mounted to surround each vertical guide rail 230 and can be moved up and down along the vertical guide rail 230. The load bar 260 provided at the bottom of the lifting bracket 250 presses the outer peripheral surface of the wave generator bearing 10.

The load cylinder 270 may be mounted on the upper surface of a bracket provided at the top of the vertical frame 220, so that the cylinder bar presses the lifting bracket 250 with a predetermined force. That is, the load cylinder 270 can cause the load bar 260 of the lifting bracket 250 to apply a load by pressing the outer peripheral surface of the wave generator bearing 10 with a predetermined force.

The distance sensor 320 is mounted on the lifting bracket 250 and can indirectly measure the amount of radial deformation of the wave generator bearing 10. As described later, the distance sensor 320 is composed of a laser distance sensor, but does not directly measure the radial displacement by reflecting the laser on the outer peripheral surface of the wave generator bearing 10, but rather measures the radial displacement of the outer peripheral surface of the wave generator bearing 10. It is desirable to indirectly measure the radial deformation of the wave generator bearing 10 by installing a separate reflection member 325 that moves in the same manner as the movement.

Meanwhile, as shown in FIG. 3(a), the wave generator bearing 10 is attached to the first bearing bracket 181 mounted on one end of the first base bed 120 and the upper surface of the slide bed 210. It can be mounted on the rotation shaft 160 connected between the mounted second bearing brackets 182.

The first bearing bracket 181 may be installed on the left end of the upper surface of the first base bed 120, and the second bearing bracket 182 may be installed on the right upper surface of the slide bed 210. And, between the first bearing bracket 181 and the support bracket 180, a couple selectively couples the rotation shaft 160 on which the wave generator bearing 10 is mounted and the rotation shaft 160 connected to the drive motor 150. A ring 190 may be provided.

As shown in FIG. 3(b), mounting bearings 25 may be provided on the right and left sides of the input shaft 20, on which the cam portion 22 that is press-fitted into the wave generator bearing 10 is mounted. . When mounting the wave generator bearing 10 to the performance test device 100, the mounting bearing 25 on the right is mounted inside the first bearing bracket 181, and the mounting bearing 25 on the left is mounted inside the second bearing bracket. (182) Can be mounted internally.

The rotation shaft 160 is coupled to one side of the input shaft 20 on which the wave generator bearing 10 and a pair of mounting bearings 25 are mounted, and then the rotation shaft 160 is coupled through the first bearing bracket 181. It can be coupled to the ring 190. Next, the slide bed 210 can be pushed to the right so that the left mounting bearing 25 is positioned inside the second bearing bracket 182.

The load cylinder 270 is preferably a pneumatic cylinder operated by air pressure. This is because the load cylinder 270 can reduce shock when applying a load by pressing the wave generator bearing 10 through the lifting bracket 250.

As shown in FIG. 6, the bearing load device module 200 has a pressure valve 280 that regulates the pressure of the air supplied to the load cylinder 270 and a flow direction of the air supplied to the load cylinder 270. It may further include a directional valve 290 for controlling.

The pressure valve 280 is provided on the air flow hose connected from the pneumatic pump (not shown) to the load cylinder 270, and can control the pressure of the supplied air. The pressure valve 280 may be coupled to the side of the vertical frame 220. The pressure valve 280 may be equipped with an air pressure control switch and a pressure gauge to measure air pressure.

In addition, since air is supplied or discharged from the load cylinder 270, the flow direction of air into the load cylinder 270 can be adjusted by providing a directional valve 290. The directional valve 290 may be coupled to the upper side of the vertical frame 220. The directional valve 290 is provided with a directional lever so that the user can easily change the direction of air flow.

Although omitted in the drawing, pneumatic hoses may be connected between the pressure valve 280, the directional valve 290, and the load cylinder 270, respectively.

In addition, the bearing load device module 200 further includes a force sensor 310 mounted on the upper surface of the lifting bracket 250, and the load cylinder 270 can be arranged to selectively press the force sensor.

The force sensor 310 is mounted on the upper surface of the lifting bracket 250 and can measure the force with which the cylinder bar of the load cylinder 270 presses the force sensor 310. The force sensor 310 is configured as a load cell and can transmit the measured load signal to the control unit 400 (see FIG. 11).

As shown in Figures 6 and 7, the lifting bracket 250 includes an upper bracket 252 that is slidably mounted on the vertical guide rail 230 and an upper bracket that is slidably mounted on the vertical guide rail 230. It may include a lower bracket 254 whose separation distance from the upper bracket is limited by a guide bar 256 coupled to and at least one load spring 258 coupled between the upper bracket and the lower bracket.

A pair of vertical guide rails 230 are fastened and fixed to one side of the vertical frame 220, and the upper bracket 252 can be mounted to slide up and down by a pair of sliders 251. The lower bracket 254 can also be mounted to slide up and down by a pair of sliders 251.

A pair of guide bars 256 may be coupled between the upper bracket 252 and the lower bracket 254. The lower bracket 254 has a through hole through which a pair of guide bars 256 pass, and the lower bracket 254 is separated from the upper bracket 252 by the lower head of each guide bar 256. Distance may be limited.

Three load springs 258 may be coupled between the upper bracket 252 and the lower bracket 254. The number of load springs 258 is not limited to three, and 1 to 3 load springs 258 may be combined. Typically, the larger the load, the greater the number of load springs 258. The load spring 258 not only transfers the load to the wave generator bearing 10 through the load bar 260 when the load cylinder 270 presses the upper bracket 252, but also connects the upper bracket to the lower bracket 254. (252) may be allowed to descend so that the separation distance becomes smaller.

The distance sensor 320 is a laser distance sensor mounted on the upper bracket 252, and a reflective member 325 that reflects the laser of the distance sensor 320 is preferably mounted on the lower bracket 254 in a height-adjustable manner. .

The laser distance sensor 320 has a light emitting unit and a light receiving unit and can measure the distance to the object by receiving laser light reflected from the object. So, the distance sensor 320 is a non-contact one-dimensional distance sensor. In the present invention, the distance sensor 320 does not directly measure the distance to the outer peripheral surface of the wave generator bearing 10, but indirectly measures the radial deformation of the wave generator bearing 10 by measuring the change in distance to the reflective member 325. It can be measured.

The reflective member 325 may be mounted on the lower bracket 254 so that its upper height can be adjusted. For this purpose, a height adjustment clamp 327 is coupled to the lower bracket 254, and a reflective member 325 can be inserted and mounted on the height adjustment clamp 327. The reflective member 325 may be formed in a cylindrical shape, and the height-adjustable clamp 327 is provided with a clamp lever 328, so that the mounting height of the reflective member 325 can be adjusted and then tightened by turning the clamp lever 328. there is.

Since the load bar 260 of the lower bracket 254 coupled with the load bar 260 is in contact with the outer peripheral surface of the wave generator bearing 10, the radial displacement of the wave generator bearing 10 is caused by the lower bracket 254. ) is the same as the vertical displacement of the reflective member 325 mounted on the. Accordingly, the distance sensor 320 can measure the radial displacement of the wave generator bearing 10 by measuring the vertical displacement of the upper surface of the reflective member 325.

The expensive laser distance sensor 320 can have an optimal measurement distance range that can measure precisely. As the load applied by the load cylinder 270 increases, the load spring 258 is compressed, and the distance from the distance sensor 320 to the reflective member 325 may become closer. Therefore, by adjusting the height of the top of the reflective member 325, the distance sensor 320 can measure in the optimal focal distance range.

As shown in FIGS. 2, 3, 6, and 9, the lifting bracket 250 is mounted to be lifted up and down on the vertical frame 220, so that the lower bracket 254 presses the wave generator bearing 10. It is desirable to further include a clamp block 240 that fixes the upper bracket 252 so that it does not rise after being lowered.

The clamp block 240 may be mounted on a fixed guide 242 that is fastened to the left side of the vertical frame 220 in the vertical direction so that the slide member 245 can be slidably guided up and down. The fixing guide 242 is formed in the shape of a circular shaft, and its upper and lower ends can be coupled to brackets and fixed at a predetermined distance from the left side of the vertical frame 220. The slide member 245 can be fixed in that position by tightening the fixing lever 246 while one side of the slide member 245 is cut and the fixing guide 242 is inserted. On the other side of the slide member 245, a support bar 247 extends in the horizontal direction, and the support bar 247 may be arranged to pass through a long hole extending vertically through the vertical frame 220.

When the load cylinder 270 is operated to lower the lifting bracket 250 so that the load bar 260 presses the wave generator bearing 10 with a predetermined load, the user lowers the slide member 245 of the clamp block 240 to lower the support bar. Let (247) contact the upper bracket (252) and then tighten the fixing lever (246) to fix it in that position. Accordingly, when the wave generator bearing 10 is deformed in the radial direction as it rotates, the clamp block 240 is pressed to limit the upper bracket 252 from rising.

Figure 11 is a block diagram showing the control configuration of the performance test device of the wave generator bearing, Figure 12 is a front view showing an example of installation of the temperature sensor of the present invention, and Figure 13 is a wave generator on the first bearing bracket and the second bearing bracket. It is a cutaway perspective view showing the bearing, vibration sensor, and noise sensor installed, Figure 14 is a front view of Figure 13, and Figures 15 and 16 are graphs showing vibration data measured by the vibration sensor.

As shown in FIG. 11, the performance test device 100 of the wave generator bearing of the present invention includes the drive motor 150, torque sensor 170, force sensor 310, and distance sensor 320, as well as vibration It may further include a sensor 330, a noise sensor 340, and a temperature sensor 350, and may include a control unit 400 that controls their operation.

The control unit 400 includes a motor driver 410 that operates the drive motor 150, a torque sensor amplifier 420 that amplifies the signal of the torque sensor 170, and a force sensor that amplifies the signal of the force sensor 310. Amplifier 430, a distance sensor amplifier 440 that amplifies the measurement signal of the distance sensor 320, a vibration sensor amplifier 450 that amplifies the measurement signal of the vibration sensor 330, and a noise sensor 340. It may include a noise sensor amplifier 460 that amplifies the signal, and a temperature sensor amplifier 470 that amplifies the signal of the temperature sensor 350.

The motor driver 410 may receive operation commands from the control unit 400 to control the rotation speed and torque of the drive motor 150.

The torque sensor amplifier 420 may amplify an electrical signal for the torque of the driving motor 150 detected by the torque sensor 170 and transmit it to the control unit 400.

The force sensor amplifier 430 may amplify the load signal detected by the force sensor 310 and transmit it to the control unit 400.

The distance sensor amplifier 440 may amplify the radial displacement signal of the wave generator bearing 10 detected by the distance sensor 320 and transmit it to the control unit 400.

The vibration sensor amplifier 450 may amplify the vibration signal of the wave generator bearing 10 detected by the vibration sensor 330 and transmit it to the control unit 400.

The noise sensor amplifier 460 may amplify the noise signal of the wave generator bearing 10 detected by the noise sensor 340 and transmit it to the control unit 400.

The temperature sensor amplifier 470 may amplify the temperature signal of the wave generator bearing 10 detected by the temperature sensor 350 and transmit it to the control unit 400.

The electrical signal from the motor driver 410 and the amplified electrical signal from each amplifier (420, 430, 440, 450, 460, 470) are converted from analog signals to digital signals through DAQ (Data Acquisition) 480 and sent to the control unit. It can be sent to (200). The control unit 400 analyzes the digital signal transmitted from the DAQ 480 and displays real-time changes in performance such as radial deformation, vibration, noise, and temperature of the wave generator bearing 10 in numbers or graphs through the monitor 490. can do.

As shown in FIG. 12, the temperature sensor 350 is installed near the wave generator bearing 10 and can measure the temperature change of the wave generator bearing 10. The temperature sensor 350 consists of a probe temperature measuring device 350-1 installed by being joined to the side of the load bar 260, or a laser scanning temperature sensor installed at a predetermined distance from the outer peripheral surface of the wave generator bearing 10. It may consist of a measuring device (350-2).

The probe temperature measuring device 350-1 is attached to the load bar 260 in contact with the wave generator bearing 10 and measures the temperature of the load bar 260, which is heated as the wave generator bearing 10 rotates. The temperature change of the wave generator bearing 10 can be measured indirectly.

The laser scanning temperature measuring device 350-2 is installed at a predetermined distance from the outer peripheral surface of the wave generator bearing 10, and can directly measure the temperature by scanning a laser toward the wave generator bearing 10. In some cases, the probe temperature measuring device (350-1) and the laser scanning temperature measuring device (350-2) may be used simultaneously.

As shown in Figures 13 and 14, the vibration sensor 330 is mounted on one side of the second bearing bracket 182 to measure the vibration of the wave generator bearing 10, and the noise sensor 340 measures the vibration of the first bearing. It is mounted on the lower part of the bracket 181 and can measure the noise of the wave generator bearing.

The vibration sensor 330 is installed on the axial side of the second bearing bracket 182, which supports the input shaft 20 on which the wave generator bearing 10 is mounted, and generates vibration as the wave generator bearing 10 rotates. can be measured. The vibration sensor 330 is installed parallel to the rotation axis of the wave generator bearing 10 and can acquire vibration data for each of the X, Y, and Z directions.

The noise sensor 340 can be installed by inserting into a through hole formed in the lower part of the first bearing bracket 181. The noise sensor 340 can measure noise generated from the input shaft 20 of the wave generator bearing 10 rotated by the rotation shaft 160 and its bearings.

Figures 15 and 16 show changes in the magnitude of vibration measured by the vibration sensor in real time. Testers can evaluate performance such as poor assembly, malfunction, and failure through frequency analysis of the vibration data measured in this way. The control unit 400 may automatically perform frequency analysis of vibration data through Fast Fourier Transform (FFT) analysis and display the results on the monitor 490.

Above, an embodiment of the present invention has been described, but those skilled in the art will be able to understand the addition, change, deletion or addition of components without departing from the spirit of the present invention as set forth in the claims. The present invention may be modified and changed in various ways, and this will also be included within the scope of the rights of the present invention.

10: Wave generator bearing
20: input shaft 22: cam part
25: Mounted bearing 30: Inner ring
40: Ball 50: Paddle
100: Performance test device for wave generator bearings
110: support 112: wheel
113: Fixing bracket
120: first base bed 122: mounting groove
130: second base bed 140: horizontal guide rail
150: Drive motor 152: Encoder
160: rotation axis 170: torque sensor
180: Support bracket 181: First bearing bracket
182: Second bearing bracket 190: Coupling
200: Bearing load device module
210: slide bed 212: slider
215: Tightening lever 220: Vertical frame
230: Vertical guide rail 240: Clamp block
242: Fixed guide 245: Slide member
246: fixing lever 247: support bar
250: Elevating bracket 251: Slider
252: Upper bracket 254: Lower bracket
256: Guide bar 258: Load spring
260: load bar 270: load cylinder
280: pressure valve 290: directional valve
310: force sensor 320: distance sensor
325: Reflective member 327: Height adjustment clamp
328: Clamp lever 330: Vibration sensor
340: Noise sensor 350: Temperature sensor
400: Control unit 410: Motor driver
420: Torque sensor amplifier 430: Force sensor amplifier
440: Distance sensor amplifier 450: Vibration sensor amplifier
460: Noise sensor amplifier 470: Temperature sensor amplifier
480: DAQ 490: Monitor

Claims (12)

A drive motor that rotates a rotating shaft rotatably mounted on a support base;
A torque sensor that measures torque of the rotation shaft; and
A bearing load device module installed on one side of the support and measuring performance including radial deformation of the wave generator bearing coupled to the rotation shaft and rotated,
The support is
A first base bed on which the drive motor, torque sensor, and rotation axis are each mounted on the upper surface by brackets,
It includes a second base bed equipped with a horizontal guide rail on the upper surface to slideably support the bearing load device module,
The bearing load device module is
A slide bed slidably mounted on the horizontal guide rail,
A vertical frame coupled to the slide bed,
a lifting bracket that is slidably mounted on a vertical guide rail provided in the vertical frame and presses on the outer peripheral surface of the wave generator bearing;
a load cylinder mounted on the upper part of the vertical frame and pressing the lifting bracket;
A performance test device for a wave generator bearing, comprising a distance sensor mounted on the lifting bracket and measuring a radial deformation amount of the wave generator bearing. delete delete According to paragraph 1,
The wave generator bearing is
A first bearing bracket mounted on one end of the first base bed,
A performance test device for a wave generator bearing, characterized in that it is mounted on a rotating shaft connected between the second bearing brackets mounted on the upper surface of the slide bed. According to paragraph 1,
The load cylinder is a pneumatic cylinder operated by air pressure,
The bearing load device module is
a pressure valve that regulates the pressure of air supplied to the load cylinder;
A performance test device for a wave generator bearing, further comprising a directional valve for controlling the flow direction of air supplied to the load cylinder. According to paragraph 1,
The bearing load device module further includes a force sensor mounted on the upper surface of the lifting bracket,
A performance test device for a wave generator bearing, wherein the load cylinder selectively presses the force sensor. According to clause 6,
The lifting bracket is
An upper bracket slidably mounted on the vertical guide rail,
a lower bracket that is slidably mounted on the vertical guide rail and whose separation distance from the upper bracket is limited by a guide bar coupled to the upper bracket;
A performance test device for a wave generator bearing, comprising at least one load spring coupled between the upper bracket and the lower bracket. In clause 7,
The distance sensor is a laser distance sensor mounted on the upper bracket,
A performance test device for a wave generator bearing, characterized in that a reflective member through which the laser of the distance sensor is reflected is mounted on the lower bracket in a height-adjustable manner. In clause 7,
The lifting bracket is
Performance test of the wave generator bearing, further comprising a clamp block that is mounted on the vertical frame to be able to lift and lowers the upper bracket so that it does not rise after the lower bracket is lowered to a position where the wave generator bearing is pressed. Device. According to paragraph 4,
A vibration sensor mounted on one side of the second bearing bracket to measure vibration of the wave generator bearing,
A performance test device for a wave generator bearing, further comprising a noise sensor mounted on a lower portion of the first bearing bracket to measure noise of the wave generator bearing. In clause 7,
The lifting bracket further includes a load bar coupled to the lower surface of the lower bracket and contacting the wave generator bearing,
A performance test device for a wave generator bearing, further comprising a temperature sensor that is attached to the load bar and measures the temperature of the load bar, which is heated as the wave generator bearing rotates. In clause 7,
A performance test device for a wave generator bearing, further comprising a temperature sensor installed at a predetermined distance from the wave generator bearing and measuring the temperature by scanning a laser toward the wave generator bearing.

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