Life testing device for lifting support

Abstract

The utility model relates to a lifting support service life testing device which 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, the power assembly is connected to the transmission assembly, and the fixing clamp is arranged on the rack. 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, the power assembly drives the transmission assembly to operate, and 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. Background Art

[0002] Lifting brackets are widely used in products such as computers, cash registers, and consoles to support and adjust the height of the products. Before leaving the factory, they need to be tested for their reciprocating motion lifespan. Current test fixtures cannot adjust the operating speed of the lifting bracket, nor can they measure the push and pull forces acting on the lifting bracket in real time, making it impossible to determine the elastic force attenuation state of the lifting bracket. Utility Model Content

[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 includes a frame, a single-axis robot and a fixing fixture. The single-axis robot includes a shell, a power assembly and a transmission assembly. The shell is fixedly installed on the frame, the transmission assembly is installed in the shell, the power assembly is connected to the transmission assembly, the fixing fixture is fixedly installed on the power assembly, a push-pull force sensor is fixedly installed 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 to complete the reciprocating motion test of the lifting bracket.

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

[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, the power assembly is fixedly installed on the upper side plate, and the power assembly is located on the outside 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 rod and a screw nut threaded on the screw rod, the screw rod 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 housing, 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 housing.

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

[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 beneficial effects of the present application are as follows: the present application utilizes a PLC to drive and control the operation of a single-axis robot. During testing, the handle of the lifting bracket is fixed in a fixed 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 values ​​​​acting on the lifting bracket are obtained in real time through the push-pull force sensor, and the elastic force attenuation of the spring in the lifting bracket is monitored based on the push-pull force values. Therefore, in the present application, while completing the reciprocating life test of the lifting bracket using a single-axis robot, the push-pull force values ​​​​acting on the lifting bracket and the elastic force attenuation of the spring can be obtained in real time through the push-pull force sensor, thereby being able to comprehensively evaluate the quality of the lifting bracket, thereby improving the product shipment qualification rate and product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is one of the structural diagrams of the test device in this application;

[0016] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0017] Figure 3 This is the second structural diagram of the test device in this application;

[0018] Figure 4 This is the third structural diagram of the test device in this application;

[0019] Figure 5 This is the fourth structural diagram of the test device in this application;

[0020] Figure 6 This is a schematic diagram of the structure of the rack in this application;

[0021] Figure 7 This is a schematic diagram of the structure of the single-axis robot in this application;

[0022] Figure 8 This is a schematic diagram of the structure of the fixing fixture in this application;

[0023] 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 splint, 320-second splint, 321-first groove, 330-third splint, 331-second groove, 340-push-pull force sensor, 400-electric control box. DETAILED DESCRIPTION

[0024] The following will be combined with the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described in this application are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0025] It should be noted that the terms "first", "second", etc. in the specification and claims of this 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 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 variations thereof 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 clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0026] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. 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 figures. For example, if the device in the 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.

[0027] 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, the single-axis robot 200 includes a shell 210, a power assembly 220 and a transmission assembly 230, the shell 210 is fixedly installed 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 installed on the power assembly 220, and a push-pull force sensor 340 is fixedly installed in the fixing fixture 300, 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 to complete the reciprocating motion test of the lifting bracket.

[0028] The push-pull force sensor 340 is used to obtain the push-pull force exerted on the lifting bracket. An electric control box 400 is fixedly installed on the frame 100, and a PLC, an air switch, a switching power supply, a stepper driver, a relay, a terminal strip, a single-axis robot start switch and a 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, and 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 that the quality of the lifting bracket can be evaluated from all angles, thereby improving the product shipment qualification rate and product quality.

[0029] like Figure 1 and Figure 6 As shown, the frame 100 includes a frame 110, a tabletop 120, and foot cups 130. The tabletop 120 is fixedly mounted on the upper end of the frame 110, and multiple foot cups 130 are fixedly mounted on the lower end of the frame 110. Angle brackets 140 are fixedly mounted inside the frame 110, and the single-axis robot 200 is fixedly mounted on the tabletop 120. The frame 110 is made of aluminum profiles connected by plug-in and fixed with angle brackets 140 to enhance the strength of the frame 110. The tabletop 120 is made of aluminum plate. In this embodiment, the frame 110 is assembled from 60*60mm aluminum profiles and angle brackets 140. The foot cups 130 have a diameter of 60mm. The tabletop 120 is machined from 900*800mm*12mm aluminum plate.

[0030] 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 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 both 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 outside the upper side plate 214. The transmission assembly 230 is installed inside the housing 210, and 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.

[0031] 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, and the second end of the coupling 223 is fixedly connected to the transmission assembly 230. The coupling 223 is rotatably mounted on the first bearing seat 222. The first bearing seat 222 is fixedly mounted within the base 211. The stepper motor 221 is connected to the transmission assembly 230 via the coupling to drive the transmission assembly 230 to rotate. In this embodiment, the stepper motor 221 has a maximum speed of 1500 R / S and a maximum torque of 20 NM.

[0032] 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 with a diameter of 25 mm, a lead of 5 mm, a running accuracy of ±0.02 mm, a maximum speed of 1500 mm / S, and a maximum load of 34 KGF. In this application, the screw assembly is used to drive the reciprocating operation of the product, i.e., the lifting bracket, so that the product can be hovered at any position, with high running accuracy and accurate and reliable test results.

[0033] like Figure 7 As shown, a guide rail 212 is provided within the housing 210. Specifically, the guide rail 212 is fixedly mounted within the base 211. A guide rail 212 is mounted on each side of the lead screw 231. The slider 233 is slidably mounted on the guide rail 212. The first end of the lead screw 231 is connected to the power assembly 220, and the second end of the lead screw 231 is rotatably mounted on a second bearing seat 234. The second bearing seat 234 is fixedly mounted within the housing 210. The stepper motor 221 drives the lead screw 231 to rotate via the coupling 223. The lead screw 231 drives the lead screw nut 232 to move along the lead screw 231, thereby driving the synchronous operation of the lifting bracket.

[0034] like Figure 1 and Figure 7 As shown, a support plate 235 is fixedly mounted on the slider 233, and 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 end point of the lifting bracket, so as to accurately locate the movement range of the lifting bracket.

[0035] When the housing 210 is fixedly mounted on the frame 100, Figure 1 As shown, in a possible embodiment, 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.

[0036] In another possible embodiment, screw rod 231 is parallel to the horizontal plane. Screw rod 231 can drive the lifting bracket to move horizontally, thereby testing the life of the lifting bracket's horizontal reciprocating motion. Therefore, in this application, by adjusting the installation direction of screw rod 231, the product's reciprocating life test in the horizontal or vertical direction can be achieved, broadening the scope of application of the testing device.

[0037] 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. A mounting groove is formed between the second clamping plate 320 and the third clamping plate 330. The second clamping plate 320 has a first groove 321, and the third clamping plate 330 has a second groove 331. When the third clamping plate 330 is placed over 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.

[0038] A method for testing the life of a lifting bracket, using the above-mentioned testing device for testing, includes the following steps:

[0039] Step 1: Secure the lift bracket: Secure the handle of the lift bracket to be tested in the fixture 300. First, place the handle of the lift 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 secure it with screws.

[0040] Step 2: Adjust the lifting bracket: Two photoelectric sensors 240 are provided on the housing 210. Adjust the position of the lifting bracket so that one photoelectric sensor 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 travel of the lifting bracket. For example, if the travel of the lifting bracket is 300 mm, the distance between the two photoelectric sensors is also 300 mm.

[0041] 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: pause for 10 seconds after every 500 runs;

[0042] 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 operate, and the transmission assembly 230 drives the lifting bracket to reciprocate. The test software records the push and pull forces exerted on the lifting bracket through the push and pull force sensor 340; during operation, the stepper motor 221 drives the screw rod 231 to rotate, and the screw rod 231 drives the screw nut 232 to operate along the screw rod 231, and the fixing fixture 300 and the lifting bracket operate synchronously with the screw nut 232;

[0043] Step 5: Data Collection: After the test, the push-pull force values ​​are collected from the test software and displayed in a table and dynamic curves to analyze the performance of the lift bracket. After reaching the preset number of reciprocating cycles, the single-axis robot stops, and the push-pull force values ​​are analyzed to determine the attenuation of the lift bracket's springs.

[0044] This test method can test the reciprocating motion life of the lifting bracket over a long period of time, including vertical and horizontal reciprocating motion. It can also adjust the robot's motion rate, acceleration and deceleration, and intermittent measurement time as needed, and detect the attenuation of the lifting bracket's spring force in real time. The attenuation is 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.

[0045] It should be noted that those skilled in the art may make a number of modifications and improvements without departing from the concept of this application, and these modifications and improvements are all within the scope of protection of this application. Therefore, the scope of protection of this patent application shall be based on the appended claims.

Claims

1. A lifting bracket life test device, characterized by: 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 both 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 outside the upper side plate (214).

4. The lifting bracket life test device according to claim 1, characterized in that: The power assembly (220) includes 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), a first end of the screw rod (231) is connected to the power assembly (220), a 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 or parallel to a horizontal plane.

9. The lifting bracket life test device according to claim 1, characterized in that: 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); 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).

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