A kind of electric cylinder reliability loading test device

Abstract

The application relates to a kind of electric cylinder reliability loading test devices, belong to electric cylinder test device technical field;Including base, the upper end of base is fixedly provided with two left-right symmetrical vertical side frames, top beam is fixedly arranged between the upper end of two side frames, electric hoist is arranged at the lower end of top beam;Upper rail beam and lower rail beam are slidably arranged between two side frames along the vertical direction, ballast counterweight is arranged at the upper end of upper rail beam, tension load counterweight is arranged at the lower end of lower rail beam;Electric cylinder to be tested and tension and compression force sensor are arranged between upper rail beam and lower rail beam;Transfer trolley is slidably arranged at the upper end of base;Solved the problem of not using oil cylinder loading when electric cylinder reliability loading test.

Description

Technical Field

[0001] This invention belongs to the technical field of electric cylinder testing devices, specifically relating to an electric cylinder reliability loading testing device. Background Technology

[0002] With the continuous development of electric drive technology, electric cylinders, as typical drive components, are receiving increasing attention in the industry. Loading tests are an essential part of the performance evaluation and testing of electric cylinders. As the understanding and requirements for product performance become increasingly sophisticated, more and more products require repeated loading tests, i.e., reliability tests, typically exceeding a thousand cycles, and sometimes reaching tens of thousands. This places demands on the automation of testing equipment, moving beyond the traditional typical structure (test platform + tooling cylinder + ordinary pump source). Figure 13 As shown.

[0003] On the other hand, as the number of products increases, the demand for pump sources in the workshop also gradually increases. Given that: (1) the cost of pump sources is relatively high; (2) the loading force value of oil pumps fluctuates to a certain extent and is not accurate enough, especially when loading low-load "small" cylinders, this shortcoming is more prominent; (3) the on-site 6S management situation is relatively complicated, so we seek a solution that does not use oil cylinders for loading.

[0004] Based on the above problems, the urgent technical problem to be solved is to design a device and test method for conducting reliability loading tests on electric cylinders. Summary of the Invention

[0005] This invention overcomes the shortcomings of the prior art and proposes an electric cylinder reliability loading test device; it solves the problem of how to load electric cylinders without using hydraulic cylinders during reliability loading tests.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution.

[0007] An electric cylinder reliability loading test device includes a base, two symmetrical vertical side frames fixedly mounted on the upper end of the base, a top beam fixedly mounted between the upper ends of the two side frames, and an electric hoist mounted at the lower end of the top beam; an upper guide beam and a lower guide beam slidably mounted vertically between the two side frames, a ballast counterweight mounted on the upper end of the upper guide beam, and a tensile counterweight mounted on the lower end of the lower guide beam; an electric cylinder to be tested and a tensile / compression sensor are mounted between the upper and lower guide beams; and a transfer trolley slidably mounted on the upper end of the base.

[0008] Furthermore, the base includes a first base and a second base, with the front end of the second base fixedly connected to the middle of the rear end face of the first base; a limiting strip is fixedly provided on the left and right sides of the upper end face of the second base respectively; each side frame includes a first side frame and a second side frame, with the upper end of the first side frame fixedly connected to the lower end of the second side frame; the lower ends of the two first side frames are fixedly connected to the left and right sides of the upper end face of the first base respectively; a vertical guide rail is fixedly provided on the side end face of the two first side frames that are close to each other.

[0009] Furthermore, the top beam includes a top plate, a reinforcing rib plate, and an upper lifting lug; the left and right ends of the lower end face of the top plate are fixedly connected to the upper ends of two second side frames respectively, the upper end face of the top plate is fixedly provided with a reinforcing rib plate, and the center of the lower end face of the top plate is fixedly provided with an upper lifting lug, and the fixed end of the electric hoist is connected to the upper lifting lug.

[0010] Furthermore, two sets of protective mechanisms are fixedly installed on the end faces of the two first side frames that are close to each other. Each set of protective mechanisms includes two protective components, which are located on the front and rear sides of the guide rail on the same side. The protective components include a protective seat and a protective rod. The protective seat is bolted to the first side frame, the protective rod is kept horizontal, and one end of the protective rod is rotatably mounted on the protective seat.

[0011] Furthermore, the transfer trolley includes a placement plate, baffles, and rollers; two baffles are fixedly installed at the left and right ends of the placement plate, and a roller is rotatably installed at each of the four corners of the lower end face of the placement plate.

[0012] Furthermore, the upper guide rail beam includes an upper mounting plate and upper guide blocks. An upper guide block is fixedly installed at the middle of the left and right ends of the upper mounting plate, and the two upper guide blocks are slidably engaged with the guide rails on the left and right sides respectively. The tension and compression sensor is fixedly installed at the center of the lower end face of the upper mounting plate.

[0013] Furthermore, the lower guide rail beam includes a lower mounting plate and lower guide blocks. A lower guide block is fixedly installed at the middle of each of the left and right ends of the lower mounting plate, and the two lower guide blocks are slidably engaged with the guide rails on the left and right sides respectively. The electric cylinder under test is kept vertical. One end of the cylinder body of the electric cylinder under test is vertically downward and is fixedly connected to the center of the upper surface of the lower mounting plate through an adapter. One end of the piston rod of the electric cylinder under test is vertically upward and is fixedly connected to the tension and compression sensor through an adapter.

[0014] Furthermore, the ballast counterweight consists of multiple ballast counterweight plates stacked vertically, and the tension counterweight consists of multiple tension counterweight plates stacked vertically.

[0015] Furthermore, an upper fixing plate is provided on the upper end of the ballast counterweight, and a lower lifting lug is fixedly installed at the center of the upper end face of the upper fixing plate. The suspension end of the electric hoist is connected to the lower lifting lug. Multiple fixing bolts pass through the upper mounting plate and the ballast counterweight plate in sequence and are screwed with fixing nuts. Two fixing bolts pass through the upper mounting plate, the ballast counterweight plate and the upper fixing plate in sequence and are screwed with fixing nuts, thereby fixing the upper fixing plate, the ballast counterweight and the upper guide rail beam.

[0016] Furthermore, multiple fixing bolts pass through the load-bearing counterweight plate and the lower mounting plate in sequence, and are then screwed with fixing nuts, thereby fixing the load-bearing counterweight to the lower guide beam.

[0017] The beneficial effects of this invention compared to the prior art are as follows: This invention provides an electric cylinder reliability loading test device, suitable for conducting hundreds or thousands of reliability loading tests on electric cylinders within a specified parameter range (electric cylinder parameter range: load within 2t, stroke within 2m). It accurately loads the electric cylinder under test using counterweights, avoiding the fluctuations in loading values ​​common in traditional hydraulic cylinders. Reliability testing with this device significantly improves testing efficiency and saves time and costs. It represents a step towards intelligent development in the company's electric cylinder testing field and is also an important manifestation of cost reduction and efficiency improvement in this area. Attached Figure Description

[0018] The present invention will now be described in further detail with reference to the accompanying drawings: Figure 1 This is a three-dimensional schematic diagram of the entire invention; Figure 2 This is a front view of the entire invention; Figure 3 yes Figure 2 A magnified view of a portion of point A in the middle; Figure 4 This is a structural diagram of the base; Figure 5 This is a structural schematic diagram of the first side frame; Figure 6 This is a structural diagram of the top beam; Figure 7 This is a structural diagram of the transfer trolley; Figure 8 This is a structural schematic diagram of the lower guide beam; Figure 9 This is a structural schematic diagram of the upper guide beam; Figure 10 This is a schematic diagram showing the connection between the lower guide beam and the tensile counterweight; Figure 11 This is a schematic diagram showing the connection between the upper guide beam and the ballast counterweight; Figure 12This is a structural schematic diagram of the protective component; Figure 13 This is a schematic diagram of the structure of an existing electric cylinder loading test device; Among them, 1 is the base, 2 is the side frame, 3 is the top beam, 4 is the electric hoist, 5 is the upper guide rail beam, 6 is the lower guide rail beam, 7 is the ballast counterweight, 8 is the tension counterweight, 9 is the electric cylinder to be tested, 10 is the tension and pressure sensor, 11 is the transfer trolley, 12 is the first base, 13 is the second base, 15 is the limit bar, 16 is the first side frame, 17 is the second side frame, 18 is the guide rail, 19 is the top plate, 20 is the reinforcing rib plate, 21 is the upper lifting lug, 22 is the protective seat, 23 is the protective rod, 24 is the placement plate, 25 is the baffle, 26 is the roller, 27 is the upper mounting plate, 28 is the upper guide block, 29 is the lower mounting plate, 30 is the lower guide block, 31 is the adapter, 32 is the upper fixing plate, and 33 is the lower lifting lug. Detailed Implementation

[0019] To make the technical problems to be solved, the technical solutions, and the beneficial effects of this invention clearer, the invention will be further described in detail with reference to the embodiments and accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The technical solutions of this invention are described in detail below with reference to the embodiments and accompanying drawings, but the scope of protection is not limited thereto.

[0020] like Figure 1 As shown in Figure 12, this invention provides an electric cylinder reliability loading test device, including a base 1. Two symmetrical vertical side frames 2 are fixedly installed on the upper end of the base 1. A top beam 3 is fixedly installed between the upper ends of the two side frames 2. An electric hoist 4 is installed at the lower end of the top beam 3. An upper guide beam 5 and a lower guide beam 6 are slidably installed between the two side frames 2 along the vertical direction. A ballast counterweight 7 is installed at the upper end of the upper guide beam 5, and a tension counterweight 8 is installed at the lower end of the lower guide beam 6. An electric cylinder 9 to be tested and a tension / compression sensor 10 are installed between the upper guide beam 5 and the lower guide beam 6. A transfer trolley 11 is slidably installed on the upper end of the base 1.

[0021] The base 1 includes a first base 12 and a second base 13 fixedly connected to each other. Both the first base 12 and the second base 13 are horizontal. The length of the first base 12 is set along the left-right direction, and the length of the second base 13 is set along the front-back direction. The front end of the second base 13 is fixedly connected to the middle of the rear end face of the first base 12. A horizontal limiting strip 15 is fixedly provided on the left and right sides of the upper end face of the second base 13.

[0022] Each side frame 2 includes a first side frame 16 and a second side frame 17, both of which are vertical. The upper end of the first side frame 16 is fixedly connected to the lower end of the second side frame 17. The lower ends of the two first side frames 16 are fixedly connected to the left and right sides of the upper end face of the first base 12, respectively. A vertical guide rail 18 is fixedly installed on the side end face of the two first side frames 16 that are close to each other.

[0023] The top beam 3 includes a top plate 19, reinforcing ribs 20, and upper lifting lugs 21. The top plate 19 is a horizontally arranged square plate structure. The left and right ends of the lower end face of the top plate 19 are fixedly connected to the upper ends of two second side frames 17, respectively. The upper end face of the top plate 19 is fixedly provided with reinforcing ribs 20 for increasing strength. The lower end face of the top plate 19 is fixedly provided with an upper lifting lug 21 at the center. The fixed end of the electric hoist 4 is connected to the upper lifting lug 21.

[0024] Two sets of protective mechanisms are fixedly installed on the adjacent end faces of the two first side frames 16. Each set of protective mechanisms includes two protective components, which are located on the front and rear sides of the guide rail 18 on the same side, respectively. Each protective component includes a protective seat 22 and a protective rod 23. The protective seat 22 is bolted to the first side frame 16, and the protective rod 23 remains horizontal, with one end rotatably mounted on the protective seat 22. When the protective rod 23 rotates to a front-rear angle, the upper guide rail beam 5 and the lower guide rail beam 6 can pass smoothly through the two sets of protective mechanisms. When the protective rod 23 rotates to a left-right angle, the two sets of protective mechanisms on the lower side can protect the lower guide rail beam 6 from falling, and the two sets of protective mechanisms on the upper side can protect the upper guide rail beam 5 from falling.

[0025] The transfer trolley 11 includes a placement plate 24, baffles 25, and rollers 26. The placement plate 24 is a horizontally arranged square plate structure. Two baffles 25 are fixedly installed at the left and right ends of the placement plate 24, respectively, and are distributed front to back. The baffles 25 on the left and right sides limit the load-bearing counterweight plate on the placement plate 24. A roller 26 is rotatably installed at each of the four corners of the lower end face of the placement plate 24, and the rollers 26 drive the placement plate 24 to move in the front-back direction. When the transfer trolley 11 moves to the upper end of the second base 13, the limiting strips 15 on the left and right sides limit the transfer trolley 11.

[0026] The upper guide beam 5 includes an upper mounting plate 27 and upper guide blocks 28. The upper mounting plate 27 is a horizontally arranged square plate structure. An upper guide block 28 is fixedly installed at the middle of each of the left and right ends of the upper mounting plate 27. The two upper guide blocks 28 are slidably engaged with the guide rails 18 on the left and right sides, respectively. The tension and compression sensor 10 is fixedly installed at the center of the lower end face of the upper mounting plate 27.

[0027] The lower guide beam 6 includes a lower mounting plate 29 and lower guide blocks 30. The lower mounting plate 29 is a horizontally arranged square plate structure. A lower guide block 30 is fixedly installed at the middle of each of the left and right ends of the lower mounting plate 29. The two lower guide blocks 30 are slidably engaged with the guide rails 18 on the left and right sides, respectively. The electric cylinder 9 under test is kept vertical. One end of the cylinder body of the electric cylinder 9 is vertically downward and fixedly connected to the center of the upper end face of the lower mounting plate 29 through an adapter 31. One end of the piston rod of the electric cylinder 9 is vertically upward and fixedly connected to the tension / compression sensor 10 through the adapter 31.

[0028] The ballast counterweight 7 is composed of multiple ballast counterweight plates stacked vertically, and the tension counterweight 8 is composed of multiple tension counterweight plates stacked vertically.

[0029] An upper fixing plate 32 is installed on the upper end of the ballast counterweight 7. A lower lifting lug 33 is fixedly installed at the center of the upper end face of the upper fixing plate 32, and the suspension end of the electric hoist 4 is connected to the lower lifting lug 33. Multiple fixing bolts pass through the upper mounting plate 27 and the ballast counterweight plate in sequence and are screwed with fixing nuts, thereby fixing the ballast counterweight 7 to the upper guide beam 5. Two more fixing bolts pass through the upper mounting plate 27, the ballast counterweight plate, and the upper fixing plate 32 in sequence and are screwed with fixing nuts, thereby fixing the upper fixing plate 32 to the upper guide beam 5. The weight of the ballast counterweight 7 can be adjusted by fixing different numbers of ballast counterweight plates.

[0030] Multiple fixing bolts pass through the load-bearing counterweight plate and the lower mounting plate 29 in sequence, and are then screwed with fixing nuts, thereby fixing the load-bearing counterweight 8 to the lower guide beam 6. The weight of the load-bearing counterweight 8 can be adjusted by fixing different numbers of load-bearing counterweight plates.

[0031] A set of proximity switches is fixedly installed on the side end face of the two first side frames 16 that are close to each other.

[0032] The specific steps for using this invention are as follows: S1 Preparatory work before the test S1.1 Initially, the transfer trolley 11 is moved to the upper end of the second base 13, and then a corresponding number of load counterweight plates are placed on the placement plate 24 of the transfer trolley 11 so that the weight of the load counterweight 8 matches the load of the electric cylinder 9 to be tested.

[0033] S1.2 The operator pushes the transfer trolley 11 and moves it forward from the second base 13 to the upper part of the first base 12, so that the transfer trolley 11, carrying the load counterweight plate, moves to the lower guide beam 6. Then, the load counterweight 8 is fixedly connected to the lower guide beam 6 using fixing bolts and fixing nuts.

[0034] S1.3 Rotate the protective rods 23 inside the two sets of upper protective mechanisms to left and right angles. The four protective rods 23 that rotate out support the upper guide beam 5 to prevent it from falling. Then, fix the ballast counterweight 7 to the upper guide beam 5 with fixing bolts and nuts. Next, connect the fixed end of the electric hoist 4 to the upper lifting lug 21 on the top beam 3, and connect the suspended end of the electric hoist 4 to the lower lifting lug 33 on the upper fixed plate 32. Adjust the height of the upper guide beam 5 with the electric hoist 4 so that the distance between the upper guide beam 5 and the lower guide beam 6 matches the height of the electric cylinder 9 to be tested. Then, install the electric cylinder 9 to be tested between the upper guide beam 5 and the lower guide beam 6 using the two adapters 31, ensuring that one end of the piston rod on the upper side of the electric cylinder 9 to be tested is connected to the tension / compression sensor 10.

[0035] S2 Single Manual Loading Test S2.1 Control the piston rod of the electric cylinder 9 under test to extend, lift the upper guide beam 5 and the ballast counterweight 7 upward, thereby completing the ballast test.

[0036] S2.2 Using the electric hoist 4, the ballast counterweight 7, upper guide beam 5, electric cylinder 9 to be tested, lower guide beam 6, and load-bearing counterweight 8 are lifted upwards to a certain height, so that the ballast counterweight 7 leaves the transfer trolley 11. At this time, the electric cylinder 9 to be tested has already borne the load.

[0037] S2.3 Control the piston rod of the electric cylinder 9 under test to retract, and pull the lower guide beam 6 and the load counterweight 8 upward, thereby completing the load test.

[0038] S3 Reliability Test Information acquisition consists of two parts: proximity switches are arranged on the first side frame 16, and the positions of the proximity switches are reasonably arranged according to the stroke of the electric cylinder 9 under test, to collect the position information of the piston rod of the electric cylinder 9 under test, and the real-time load of the electric cylinder 9 under test is collected by the tension and compression sensor 10 installed on the lower side of the upper guide beam 5.

[0039] S3.1 Control the piston rod of the electric cylinder 9 under test to extend, and complete the ballast test when it extends into place.

[0040] S3.2 The proximity switch collects the piston rod position information of the electric cylinder under test 9 and inputs a signal, so that the electric hoist 4 lifts the ballast counterweight 7, the upper guide beam 5, the electric cylinder under test 9, the lower guide beam 6, and the load counterweight 8 upward to a certain height.

[0041] S3.3 After this action is completed, input a signal to retract the piston rod of the electric cylinder 9 under test, thus completing the tensile test.

[0042] After the action S3.4 is completed, input a signal to control the electric hoist 4 to descend to the initial position.

[0043] The reliability test is completed in multiple cycles by directly inputting the number of tests on the control panel. The process mainly uses the position information of the electric cylinder under test 9 for motion control, and the tension and compression sensor 10 is responsible for monitoring the actual load on the electric cylinder under test 9. The program controls the electric cylinder under test 9 and the electric hoist 4 in a joint manner, eliminating the dependence on operators.

[0044] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A reliability loading test device for an electric cylinder, characterized in that: The system includes a base (1), two symmetrical vertical side frames (2) fixedly mounted on the upper end of the base (1), a top beam (3) fixedly mounted between the upper ends of the two side frames (2), and an electric hoist (4) mounted on the lower end of the top beam (3); an upper guide beam (5) and a lower guide beam (6) are slidably mounted vertically between the two side frames (2), a ballast counterweight (7) is mounted on the upper end of the upper guide beam (5), and a tension counterweight (8) is mounted on the lower end of the lower guide beam (6); a test electric cylinder (9) and a tension / compression sensor (10) are mounted between the upper guide beam (5) and the lower guide beam (6); and a transfer trolley (11) is slidably mounted on the upper end of the base (1). The base (1) includes a first base (12) and a second base (13), with the front end of the second base (13) fixedly connected to the middle of the rear end face of the first base (12); each side frame (2) includes a first side frame (16) and a second side frame (17), with the upper end of the first side frame (16) fixedly connected to the lower end of the second side frame (17); the lower ends of the two first side frames (16) are respectively fixedly connected to the left and right sides of the upper end face of the first base (12); a vertical guide rail (18) is fixedly installed on the side end face of the two first side frames (16) that are close to each other. The top beam (3) includes a top plate (19), a reinforcing rib plate (20), and an upper lifting lug (21); the left and right ends of the lower end face of the top plate (19) are fixedly connected to the upper ends of two second side frames (17), the upper end face of the top plate (19) is fixedly provided with a reinforcing rib plate (20), and the center of the lower end face of the top plate (19) is fixedly provided with an upper lifting lug (21), and the fixed end of the electric hoist (4) is connected to the upper lifting lug (21); Two sets of protective mechanisms are fixedly installed on the side end faces of the two first side frames (16) that are close to each other. Each set of protective mechanisms includes two protective components, which are located on the front and rear sides of the guide rail (18) on the same side. The protective components include a protective seat (22) and a protective rod (23). The protective seat (22) is bolted to the first side frame (16), and the protective rod (23) is kept horizontal. One end of the protective rod (23) is rotatably mounted on the protective seat (22). The upper guide beam (5) includes an upper mounting plate (27) and an upper guide block (28). An upper guide block (28) is fixedly installed at the middle of the left and right ends of the upper mounting plate (27). The two upper guide blocks (28) are slidably engaged with the guide rails (18) on the left and right sides respectively. The tension and compression sensor (10) is fixedly installed at the center of the lower end face of the upper mounting plate (27). The lower guide beam (6) includes a lower mounting plate (29) and a lower guide block (30). A lower guide block (30) is fixedly installed at the middle of the left and right ends of the lower mounting plate (29). The two lower guide blocks (30) are slidably engaged with the guide rails (18) on the left and right sides respectively. The electric cylinder (9) to be tested is kept vertical. One end of the cylinder body of the electric cylinder (9) is vertically downward and is fixedly connected to the center of the upper end face of the lower mounting plate (29) through the adapter (31). One end of the piston rod of the electric cylinder (9) is vertically upward and is fixedly connected to the tension and compression sensor (10) through the adapter (31).

2. The electric cylinder reliability loading test device according to claim 1, characterized in that: A limiting strip (15) is fixedly installed on the left and right sides of the upper end face of the second base (13).

3. The electric cylinder reliability loading test device according to claim 2, characterized in that: The transfer trolley (11) includes a placement plate (24), baffles (25), and rollers (26); two baffles (25) are fixedly installed at the left and right ends of the placement plate (24), and a roller (26) is rotatably installed at the four corners of the lower end face of the placement plate (24).

4. The electric cylinder reliability loading test device according to claim 1, characterized in that: The ballast counterweight (7) is composed of multiple ballast counterweight plates stacked vertically, and the tension counterweight (8) is composed of multiple tension counterweight plates stacked vertically.

5. The electric cylinder reliability loading test device according to claim 4, characterized in that: An upper fixing plate (32) is provided on the upper end of the ballast counterweight (7). A lower lifting lug (33) is fixedly provided at the center of the upper end face of the upper fixing plate (32). The suspension end of the electric hoist (4) is connected to the lower lifting lug (33). Multiple fixing bolts pass through the upper mounting plate (27) and the ballast counterweight plate in sequence and are screwed with fixing nuts. Two fixing bolts pass through the upper mounting plate (27), the ballast counterweight plate, and the upper fixing plate (32) in sequence and are screwed with fixing nuts, thereby fixing the upper fixing plate (32), the ballast counterweight (7) and the upper guide beam (5) together.

6. The electric cylinder reliability loading test device according to claim 4, characterized in that: Multiple fixing bolts pass through the load counterweight plate and the lower mounting plate (29) in sequence and are screwed with fixing nuts, thereby fixing the load counterweight (8) to the lower guide beam (6).

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