Lift support life test device and test method thereof

Abstract

The invention relates to a lifting support service life testing device and a testing method thereof.The testing device comprises a rack, a single-shaft robot and a fixing clamp, the single-shaft robot comprises a shell, a power assembly and a transmission assembly, the shell is fixedly installed on the rack, the transmission assembly is installed in the shell, and the power assembly is fixedly installed on the rack; the power assembly is connected to the transmission assembly, the fixing clamp is fixedly installed on the power assembly, a push-pull force sensor is fixedly installed in the fixing clamp, the fixing clamp is used for clamping a handle of a lifting support, and the power assembly drives the transmission assembly to operate. The transmission assembly drives the fixing clamp and the lifting support to operate. According to the testing device, under the condition that the single-shaft robot is used for completing the reciprocating service life test of the lifting support, the push-pull force value borne by the lifting support and the elastic force attenuation condition of the spring can be obtained in real time through the push-pull force sensor at the same time.

Description

Technical Field

[0001] The present application relates to a lifting bracket testing technology, and in particular to a lifting bracket life testing device and a testing method thereof. Background Art

[0002] Lifting brackets are widely used in products such as computers, cash registers, and consoles because they support and adjust the height of the products. Before the lifting brackets leave the factory, they need to be tested for their lifting and reciprocating life. The current test fixtures cannot adjust the operating speed of the lifting brackets, nor can they grasp the push and pull forces on the lifting brackets in real time, so they cannot grasp the elastic force attenuation state of the lifting brackets. Summary of the invention

[0003] In order to overcome the above-mentioned defects, the present application provides a lifting bracket life test device, in which a single-axis robot is used to complete the reciprocating life test of the lifting bracket, and at the same time, the push-pull force value and spring elastic force attenuation of the lifting bracket can be obtained in real time through a push-pull force sensor.

[0004] The technical solution adopted by this application to solve its technical problems is:

[0005] A lifting bracket life test device comprises a frame, a single-axis robot and a fixing fixture, wherein the single-axis robot comprises a shell, a power assembly and a transmission assembly, wherein the shell is fixedly mounted on the frame, the transmission assembly is mounted in the shell, the power assembly is connected to the transmission assembly, the fixing fixture is fixedly mounted on the power assembly, a push-pull force sensor is fixedly mounted in the fixing fixture, the fixing fixture is used to clamp the handle of the lifting bracket, the power assembly drives the transmission assembly to operate, and the transmission assembly drives the fixing fixture and the lifting bracket to operate, so as to complete the reciprocating motion test of the lifting bracket.

[0006] Optionally, the frame includes a frame, a table top and foot cups, the table top is fixedly mounted on the upper end of the frame, a plurality of the foot cups are fixedly mounted on the lower end of the frame, an angle code is fixedly mounted inside the frame, and the single-axis robot is fixedly mounted on the table top.

[0007] Optionally, the outer shell includes a base, a cover plate, an upper side plate and a lower side plate, the transmission assembly is fixedly installed in the base, the cover plate is fixedly installed on the base, the upper side plate and the lower side plate are fixedly installed on both sides of the base respectively, the power assembly is fixedly installed on the upper side plate, and the power assembly is located on the outer side of the upper side plate.

[0008] Optionally, the power assembly includes a stepper motor, a first bearing seat and a coupling, the first end of the coupling is fixedly connected to the stepper motor, the second end of the coupling is fixedly connected to the transmission assembly, and the coupling is rotatably mounted on the first bearing seat.

[0009] Optionally, the transmission assembly includes a screw and a screw nut threadedly connected to the screw, the screw is connected to the power assembly, a slider is fixedly mounted on the screw nut, and the fixing fixture is fixedly mounted on the slider.

[0010] Optionally, a guide rail is provided in the shell, the slider is slidably mounted on the guide rail, the first end of the screw rod is connected to the power assembly, the second end of the screw rod is rotatably mounted on a second bearing seat, and the second bearing seat is fixedly mounted in the shell.

[0011] Optionally, a support plate is fixedly mounted on the slider, the support plate is located on the outside of the shell, the fixing fixture is fixedly mounted on the support plate, and a photoelectric sensor is fixedly mounted on the shell.

[0012] Optionally, when the housing is fixedly mounted on the frame, the screw rod is perpendicular to a horizontal plane or parallel to a horizontal plane.

[0013] Optionally, the fixing fixture includes a first clamp, a second clamp and a third clamp, the push-pull force sensor is fixedly mounted on the first clamp, the second clamp is fixedly mounted on the push-pull force sensor, the third clamp is fixedly mounted on the second clamp, and a mounting groove is formed between the second clamp and the third clamp.

[0014] The present application also provides a lifting bracket life test method, comprising the following steps:

[0015] Fix the lifting bracket: fix the handle of the lifting bracket to be tested in the fixing fixture;

[0016] Adjust the lifting bracket: two photoelectric sensors are arranged on the housing, and the position of the lifting bracket is adjusted so that one of the photoelectric sensors is located at the starting point of the fixed bracket and the other photoelectric sensor is located at the end point of the lifting bracket;

[0017] Set software parameters: set the speed, acceleration, reciprocating times and dwell time of the single-axis robot in the test software;

[0018] Start the single-axis robot: turn on the switch of the single-axis robot, the power component drives the transmission component to run, the transmission component drives the lifting bracket to reciprocate, and the push-pull force of the lifting bracket is recorded by the push-pull force sensor in the test software;

[0019] Collect data: After the test, collect the push and pull force values ​​in the test software to analyze the performance of the lifting bracket.

[0020] The beneficial effects of the present application are as follows: the present application utilizes PLC to drive and control the operation of the single-axis robot. During the test, the handle of the lifting bracket is fixed in the fixing fixture, the power component drives the transmission component to operate, and the transmission component drives the lifting bracket to reciprocate, thereby completing the life test of the lifting bracket. During the test, the push-pull force value of the lifting bracket is obtained in real time through the push-pull force sensor, and the elastic force attenuation of the spring in the lifting bracket is monitored according to the push-pull force value. Therefore, in the present application, while completing the reciprocating life test of the lifting bracket using the single-axis robot, the push-pull force value of the lifting bracket and the spring elastic force attenuation can be obtained in real time through the push-pull force sensor, thereby being able to evaluate the quality of the lifting bracket in all directions, thereby improving the product shipment qualification rate and product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is one of the structural schematic diagrams of the test device in this application;

[0022] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0023] Figure 3 This is the second structural diagram of the test device in this application;

[0024] Figure 4 This is the third structural diagram of the test device in this application;

[0025] Figure 5 This is the fourth structural diagram of the test device in this application;

[0026] Figure 6 It is a structural schematic diagram of the rack in this application;

[0027] Figure 7 This is a schematic diagram of the structure of the single-axis robot in this application;

[0028] Figure 8 It is a schematic diagram of the structure of the fixing fixture in this application;

[0029] In the figure: 100-frame, 110-frame, 120-table, 130-foot cup, 140-angle code, 200-single-axis robot, 210-housing, 211-base, 212-guide rail, 213-cover, 214-upper side plate, 215-lower side plate, 220-power assembly, 221-stepping motor, 222-first bearing seat, 223-coupling, 230-transmission assembly, 231-screw, 232-screw nut, 233-slider, 234-second bearing seat, 235-support plate, 240-photoelectric sensor, 300-fixing fixture, 310-first clamp, 320-second clamp, 321-first groove, 330-third clamp, 331-second groove, 340-push-pull force sensor, 400-electric control box. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the embodiments of the present application. Obviously, the embodiments described in the present application are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0031] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the following drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the objects used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0032] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0033] Example: Figure 1-8 As shown, a lifting bracket life test device includes a frame 100, a single-axis robot 200 and a fixing fixture 300, wherein the single-axis robot 200 includes a shell 210, a power assembly 220 and a transmission assembly 230, wherein the shell 210 is fixedly mounted on the frame 100, the transmission assembly 230 is installed in the shell 210, the power assembly 220 is connected to the transmission assembly 230, the fixing fixture 300 is fixedly mounted on the power assembly 220, a push-pull force sensor 340 is fixedly installed in the fixing fixture 300, and the fixing fixture 300 is used to clamp the handle of the lifting bracket, the power assembly 220 drives the transmission assembly 230 to operate, and the transmission assembly 230 drives the fixing fixture 300 and the lifting bracket to operate, so as to complete the reciprocating motion test of the lifting bracket.

[0034] The push-pull force sensor 340 is used to obtain the push-pull force exerted on the lifting bracket. The electric control box 400 is fixedly installed on the frame 100, and the PLC, air switch, switch power supply, stepper driver, relay, terminal wiring, single-axis robot start switch and power switch button, etc. are installed in the electric control box 400. In this application, Huichuan PLC is used to drive and control the operation of the single-axis robot 200. During the test, the handle of the lifting bracket is fixed in the fixing fixture 300, the power component 220 drives the transmission component 230 to operate, and the transmission component 230 drives the lifting bracket to reciprocate, thereby completing the life test of the lifting bracket. During the test, the push-pull force value exerted on the lifting bracket is obtained in real time through the push-pull force sensor 340, and the elastic force attenuation of the spring in the lifting bracket is monitored according to the push-pull force value. Therefore, in this application, the single-axis robot 200 is used to complete the reciprocating life test of the lifting bracket, and at the same time, the push-pull force value and spring force attenuation of the lifting bracket can be obtained in real time through the push-pull force sensor 340, so as to evaluate the quality of the lifting bracket from all aspects, thereby improving the product shipment qualification rate and product quality.

[0035] like Figure 1 and Figure 6 As shown, the frame 100 includes a frame 110, a table 120 and a foot cup 130. The table 120 is fixedly mounted on the upper end of the frame 110, and a plurality of the foot cups 130 are fixedly mounted on the lower end of the frame 110. An angle bracket 140 is fixedly mounted inside the frame 110, and the single-axis robot 200 is fixedly mounted on the table 120. The frame 110 is formed by plugging aluminum profiles, and the frame 110 is fixed by the angle bracket 140 to improve the strength of the frame 110. The table 120 is made of aluminum plate. In this embodiment, the frame 110 is assembled by 60*60mm aluminum profiles and angle brackets 140, the diameter of the foot cup 130 is 60mm, and the table 120 is processed by 900*800mm*12mm aluminum plate.

[0036] like Figure 1 and Figure 7 As shown, the housing 210 includes a base 211, a cover plate 213, an upper side plate 214 and a lower side plate 215, the transmission assembly 230 is fixedly installed in the base 211, the cover plate 213 is fixedly installed on the base 211, the upper side plate 214 and the lower side plate 215 are fixedly installed on both sides of the base 211, and the power assembly 220 is fixedly installed on the upper side plate 214, and the power assembly 220 is located outside the upper side plate 214. The transmission assembly 230 is installed inside the housing 210, the power assembly 220 and the fixing fixture 300 are located outside the housing 210, the upper end of the base 211 is covered with the cover plate 213, and the two sides of the base 211 are closed by the upper side plate 214 and the lower side plate 215.

[0037] like Figure 7 As shown, the power assembly 220 includes a stepper motor 221, a first bearing seat 222 and a coupling 223, the first end of the coupling 223 is fixedly connected to the stepper motor 221, the second end of the coupling 223 is fixedly connected to the transmission assembly 230, and the coupling 223 is rotatably mounted on the first bearing seat 222. The first bearing seat 222 is fixedly mounted in the base 211, and the stepper motor 221 is connected to the transmission assembly 230 through the coupling to drive the transmission assembly 230 to rotate. In this embodiment, the maximum speed of the stepper motor 221 is 1500R / S, and the maximum torque is 20NM.

[0038] like Figure 7 As shown, the transmission assembly 230 includes a screw 231 and a screw nut 232 screwed to the screw 231, the screw 231 is connected to the power assembly 220, that is, the screw 231 is connected to the second end of the coupling 223, the slider 233 is fixedly installed on the screw nut 232, and the fixing fixture 300 is fixedly installed on the slider 233. In this embodiment, the screw is a ground ball screw, the diameter of the screw is 25mm, the lead is 5mm, the operation accuracy is ±0.02mm, the fastest speed is 1500mm / S, and the maximum load is 34KGF. In this application, the screw assembly is used to drive the reciprocating operation of the product, that is, the lifting bracket, which can realize the hovering of the product at any position, and at the same time, the operation accuracy is high, and the test results are accurate and reliable.

[0039] like Figure 7 As shown, a guide rail 212 is provided in the housing 210, that is, the guide rail 212 is fixedly installed in the base 211, and a guide rail 212 is installed on both sides of the screw rod 231. The slider 233 is slidably installed on the guide rail 212. The first end of the screw rod 231 is connected to the power assembly 220, and the second end of the screw rod 231 is rotatably installed on the second bearing seat 234. The second bearing seat 234 is fixedly installed in the housing 210. The stepper motor 221 drives the screw rod 231 to rotate through the coupling 223, and the screw rod 231 drives the screw nut 232 to move along the screw rod 231, thereby driving the lifting bracket to operate synchronously.

[0040] like Figure 1 and Figure 7 As shown, a support plate 235 is fixedly mounted on the slider 233, the support plate 235 is located outside the housing 210, the fixing fixture 300 is fixedly mounted on the support plate 235, and a photoelectric sensor 240 is fixedly mounted on the housing 210. Optionally, two photoelectric sensors 240 are mounted on the base 211, and the two photoelectric sensors 240 are respectively located at the starting point and the end point of the lifting bracket, so as to accurately locate the moving stroke of the lifting bracket.

[0041] When the housing 210 is fixedly mounted on the frame 100, Figure 1 As shown, in a possible implementation manner, the screw rod 231 is perpendicular to the horizontal plane, and the screw rod 231 can drive the lifting bracket to move in the vertical direction, so that the life of the lifting bracket in the reciprocating motion in the vertical direction can be tested.

[0042] In another possible implementation, the screw rod 231 is parallel to the horizontal plane. The screw rod 231 can drive the lifting bracket to move in the horizontal direction, so that the life of the lifting bracket in the horizontal reciprocating motion can be tested. Therefore, in the present application, by adjusting the installation direction of the screw rod 231, the reciprocating life test of the product in the horizontal or vertical direction can be realized, which broadens the scope of application of the test device.

[0043] like Figure 2 and Figure 8 As shown, the fixing fixture 300 includes a first clamping plate 310, a second clamping plate 320 and a third clamping plate 330. The push-pull force sensor 340 is fixedly mounted on the first clamping plate 310, the second clamping plate 320 is fixedly mounted on the push-pull force sensor 340, and the third clamping plate 330 is fixedly mounted on the second clamping plate 320, and a mounting groove is formed between the second clamping plate 320 and the third clamping plate 330. A first groove 321 is provided on the second clamping plate 320, and a second groove 331 is provided on the third clamping plate 330. When the third clamping plate 330 is covered on the second clamping plate 320, the first groove 321 and the second groove 331 are spliced ​​to form a mounting groove, and the handle of the lifting bracket is installed in the mounting groove.

[0044] A method for testing the life of a lifting bracket, using the above-mentioned testing device for testing, comprises the following steps:

[0045] Step 1: Fix the lifting bracket: fix the handle of the lifting bracket to be tested in the fixing fixture 300; first put the handle of the lifting bracket in the first groove 321 of the second clamping plate 320, then cover the third clamping plate 330 on the second clamping plate 320 and fix it with screws;

[0046] Step 2: Adjust the lifting bracket: Two photoelectric sensors 240 are provided on the housing 210, and the position of the lifting bracket is adjusted so that one of the photoelectric sensors 240 is located at the starting point of the fixed bracket and the other photoelectric sensor 240 is located at the end point of the lifting bracket; the position of the photoelectric sensor 240 can be adjusted according to the stroke of the lifting bracket. For example, if the stroke of the lifting bracket is 300 mm, the distance between the two photoelectric sensors is also 300 mm;

[0047] Step 3: Set software parameters: Set the speed, acceleration, number of reciprocating times and pause time of the single-axis robot 200 in the test software; for example, the pause time is: stop for 10 seconds every 500 times;

[0048] Step 4: Start the single-axis robot: turn on the switch of the single-axis robot 200, the power assembly 220 drives the transmission assembly 230 to run, the transmission assembly 230 drives the lifting bracket to reciprocate, and the push-pull force on the lifting bracket is recorded by the push-pull force sensor 340 in the test software; during operation, the stepper motor 221 drives the screw rod 231 to rotate, the screw rod 231 drives the screw nut 232 to run along the screw rod 231, and the fixing fixture 300 drives the lifting bracket to run synchronously with the screw nut 232;

[0049] Step 5: Collect data: After the test, collect the push-pull force values ​​in the test software, and the software will display the push-pull force values ​​in a table and dynamic curve to analyze the performance of the lifting bracket. When the preset number of reciprocating times is reached, the single-axis robot stops running, and the attenuation of the spring in the lifting bracket is determined by analyzing the push-pull force values.

[0050] This test method can test the reciprocating motion life of the lifting bracket for a long time, including reciprocating motion in the vertical direction and reciprocating motion in the horizontal direction. The robot's movement rate, acceleration and deceleration, and intermittent measurement time can be adjusted according to needs. The attenuation of the spring force of the lifting bracket can be detected in real time and displayed in a table and dynamic curve, thereby achieving the purpose of fully automatic speed adjustment and real-time measurement of push and pull forces.

[0051] It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, and these modifications and improvements are all within the scope of protection of the present application. Therefore, the scope of protection of the patent of the present application shall be subject to the attached claims.

Claims

1. A lifting bracket life test device, characterized in that: The invention comprises a frame (100), a single-axis robot (200) and a fixing fixture (300), wherein the single-axis robot (200) comprises a housing (210), a power assembly (220) and a transmission assembly (230), wherein the housing (210) is fixedly mounted on the frame (100), the transmission assembly (230) is mounted in the housing (210), the power assembly (220) is connected to the transmission assembly (230), the fixing fixture (300) is fixedly mounted on the power assembly (220), a push-pull force sensor (340) is fixedly mounted in the fixing fixture (300), and the fixing fixture (300) is used to clamp a handle of a lifting bracket, the power assembly (220) drives the transmission assembly (230) to operate, and the transmission assembly (230) drives the fixing fixture (300) and the lifting bracket to operate, so as to complete a reciprocating motion test of the lifting bracket.

2. The lifting bracket life test device according to claim 1, characterized in that: The frame (100) comprises a frame (110), a table (120) and a foot cup (130); the table (120) is fixedly mounted on the upper end of the frame (110); a plurality of the foot cups (130) are fixedly mounted on the lower end of the frame (110); an angle code (140) is fixedly mounted inside the frame (110); and the single-axis robot (200) is fixedly mounted on the table (120).

3. The lifting bracket life test device according to claim 1, characterized in that: The housing (210) comprises a base (211), a cover plate (213), an upper side plate (214) and a lower side plate (215); the transmission assembly (230) is fixedly mounted in the base (211); the cover plate (213) is fixedly mounted on the base (211); the upper side plate (214) and the lower side plate (215) are fixedly mounted on two sides of the base (211); the power assembly (220) is fixedly mounted on the upper side plate (214), and the power assembly (220) is located on the outer side of the upper side plate (214).

4. The lifting bracket life test device according to claim 1, characterized in that: The power assembly (220) comprises a stepper motor (221), a first bearing seat (222) and a coupling (223), wherein a first end of the coupling (223) is fixedly connected to the stepper motor (221), a second end of the coupling (223) is fixedly connected to the transmission assembly (230), and the coupling (223) is rotatably mounted on the first bearing seat (222).

5. The lifting bracket life test device according to claim 1, characterized in that: The transmission assembly (230) comprises a screw rod (231) and a screw rod nut (232) screwed to the screw rod (231); the screw rod (231) is connected to the power assembly (220); a slider (233) is fixedly mounted on the screw rod nut (232); and the fixing fixture (300) is fixedly mounted on the slider (233).

6. The lifting bracket life test device according to claim 5, characterized in that: A guide rail (212) is provided in the housing (210), the slider (233) is slidably mounted on the guide rail (212), the first end of the screw rod (231) is connected to the power assembly (220), the second end of the screw rod (231) is rotatably mounted on a second bearing seat (234), and the second bearing seat (234) is fixedly mounted in the housing (210).

7. The lifting bracket life test device according to claim 5, characterized in that: A support plate (235) is fixedly mounted on the slider (233), the support plate (235) is located outside the housing (210), the fixing fixture (300) is fixedly mounted on the support plate (235), and a photoelectric sensor (240) is fixedly mounted on the housing (210).

8. The lifting bracket life test device according to claim 5, characterized in that: When the housing (210) is fixedly mounted on the frame (100), the screw rod (231) is perpendicular to a horizontal plane or parallel to a horizontal plane.

9. The lifting bracket life test device according to claim 1, characterized in that: The fixing fixture (300) comprises a first clamping plate (310), a second clamping plate (320) and a third clamping plate (330); the push-pull force sensor (340) is fixedly mounted on the first clamping plate (310); the second clamping plate (320) is fixedly mounted on the push-pull force sensor (340); the third clamping plate (330) is fixedly mounted on the second clamping plate (320); and a mounting groove is formed between the second clamping plate (320) and the third clamping plate (330).

10. A method for testing the life of a lifting bracket, using the lifting bracket life testing device according to any one of claims 1 to 9, characterized in that: The testing method comprises the following steps: Fixing the lifting bracket: fixing the handle of the lifting bracket to be tested in the fixing fixture (300); Adjusting the lifting bracket: two photoelectric sensors (240) are arranged on the housing (210), and the position of the lifting bracket is adjusted so that one of the photoelectric sensors (240) is located at the starting point of the fixed bracket and the other photoelectric sensor (240) is located at the end point of the lifting bracket; Setting software parameters: setting the speed, acceleration, number of reciprocating times and dwell time of the single-axis robot (200) in the test software; Starting the single-axis robot: turning on the switch of the single-axis robot (200), the power assembly (220) drives the transmission assembly (230) to operate, the transmission assembly (230) drives the lifting bracket to reciprocate, and the push-pull force applied to the lifting bracket is recorded in the test software through the push-pull force sensor (340); Collect data: After the test, collect the push and pull force values ​​in the test software to analyze the performance of the lifting bracket.

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