Electric cylinder reliability loading test device

Abstract

The invention relates to an electric cylinder reliability loading test device, and belongs to the technical field of electric cylinder test devices. Comprising a base, two vertical side frames in bilateral symmetry are fixedly arranged at the upper end of the base, a top beam is fixedly arranged between the upper ends of the two side frames, and an electric hoist is arranged at the lower end of the top beam; an upper guide rail beam and a lower guide rail beam are arranged between the two side frames in a sliding mode in the vertical direction, a ballast balance weight is arranged at the upper end of the upper guide rail beam, and a load pulling balance weight is arranged at the lower end of the lower guide rail beam. A to-be-tested electric cylinder and a tension and pressure sensor are arranged between the upper guide rail beam and the lower guide rail beam; a transfer trolley is slidably arranged at the upper end of the base; the problem that an oil cylinder is not used for loading in the electric cylinder reliability loading test at present is solved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of electric cylinder test devices, and particularly relates to a reliability loading test device for an electric cylinder. BACKGROUND

[0002] With the continuous development of electric drive technology, as a typical driving element, the electric cylinder is increasingly valued by the industry. In the performance evaluation and testing of the electric cylinder, loading test is an essential part. With the continuous understanding and improvement of product performance requirements, more and more products require multiple repetitive loading tests, i.e. reliability tests, and the test frequency is generally more than 1,000 times, and even up to 10,000 times, which puts forward the requirement of automation for the test equipment, and is no longer the original typical structure (test platform + tooling oil cylinder + ordinary pump source), as shown in the prior art. Figure 13

[0003] On the other hand, with the increase in the number of products, the demand for pump sources in the workshop also gradually increases. In view of the following aspects: (1) the cost of the pump source is relatively high; (2) the loading force value of the oil pump loading has a certain fluctuation, and the accuracy is insufficient, especially in the loading of low-load "small" cylinders, the shortcoming is more prominent; (3) the 6S management on site is relatively complex, therefore, a scheme without using oil cylinder loading is sought.

[0004] Based on the above problems, the technical problem to be solved at present is to design a device and a test method capable of performing reliability loading test on the electric cylinder. SUMMARY

[0005] The application overcomes the shortcomings of the prior art, and provides a reliability loading test device for an electric cylinder, which solves the problem of how to perform reliability loading test on the electric cylinder without using oil cylinder loading.

[0006] In order to achieve the above purpose, the application is implemented by the following technical scheme.

[0007] The reliability loading test device for the electric cylinder comprises a base, two vertically symmetrical side frames fixedly arranged on the upper end of the base, a top beam fixedly arranged between the upper ends of the two side frames, and an electric hoist arranged at the lower end of the top beam; an upper guide rail beam and a lower guide rail beam are slidably arranged between the two side frames in the vertical direction, a ballast counterweight is arranged at the upper end of the upper guide rail beam, and a tension counterweight is arranged at the lower end of the lower guide rail beam; a test electric cylinder and a tension and compression force sensor are arranged between the upper guide rail beam and the lower guide rail beam; and a transfer trolley is slidably arranged at the upper end of the base.

[0008] ​Further, the base comprises a first base and a second base, the front end of the second base is fixedly connected with the middle part of the rear end face of the first base; a limiting strip is fixedly arranged on the left and right sides of the upper end face of the second base; each side frame comprises a first side frame and a second side frame, the upper end of the first side frame is fixedly connected with the lower end of the second side frame; the lower ends of the two first side frames are fixedly connected with the left and right sides of the upper end face of the first base; a vertical guide rail is fixedly arranged on the side end face of the two first side frames which are close to each other.

[0009] Further, the top beam comprises 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 with the upper ends of the two second side frames, the upper end face of the top plate is fixedly provided with the reinforcing rib plate, the center of the lower end face of the top plate is fixedly provided with the upper lifting lug, and the fixed end of the electric hoist is connected with the upper lifting lug.

[0010] Further, the side end face of the two first side frames which are close to each other is fixedly provided with two groups of protection mechanisms, each group of protection mechanisms comprises two protection pieces, and the two protection pieces are located on the front and rear sides of the guide rail on the same side; the protection piece comprises a protection seat and a protection rod, the protection seat is screwed on the first side frame, the protection rod is horizontal, and one end of the protection rod is rotationally arranged on the protection seat.

[0011] Further, the transfer trolley comprises a placing plate, a baffle and a roller, two front and rear baffles are fixedly arranged on the left and right ends of the placing plate, and one roller is rotationally arranged at each of the four corners of the lower end face of the placing plate.

[0012] Further, the upper guide rail beam comprises an upper mounting plate and an upper guide block, one upper guide block is fixedly arranged on the middle part of the left and right ends of the upper mounting plate, and the two upper guide blocks are respectively slidably connected with the guide rails on the left and right sides; the tension and pressure sensor is fixedly arranged at the center of the lower end face of the upper mounting plate.

[0013] Further, the lower guide rail beam comprises a lower mounting plate and a lower guide block, one lower guide block is fixedly arranged on the middle part of the left and right ends of the lower mounting plate, and the two lower guide blocks are respectively slidably connected with the guide rails on the left and right sides; the electric cylinder to be tested is kept vertical, one end of the cylinder body of the electric cylinder to be tested is vertically downward and is fixedly connected with the center of the upper end face of the lower mounting plate through an adapter, and one end of the piston rod of the electric cylinder to be tested is vertically upward and is fixedly connected with the tension and pressure sensor through an adapter.

[0014] Further, the ballast weight is composed of a plurality of ballast weight plates stacked in up and down directions, and the tension weight is composed of a plurality of tension weight plates stacked in up and down directions.

[0015] Further, an upper fixing plate is arranged at the upper end of the ballast weight, a lower lifting lug is fixedly arranged at the center of the upper end surface of the upper fixing plate, and the suspension end of the electric hoist is connected with the lower lifting lug; a plurality of fixing bolts are sequentially threaded through the upper mounting plate, the ballast weight plate and then screwed with fixing nuts, and two fixing bolts are sequentially threaded through the upper mounting plate, the ballast weight plate, the upper fixing plate and then screwed with fixing nuts, so that the upper fixing plate, the ballast weight and the upper guide rail beam are fixedly connected.

[0016] Further, a plurality of fixing bolts are sequentially threaded through the ballast weight plate, the lower mounting plate and then screwed with fixing nuts, so that the ballast weight and the lower guide rail beam are fixedly connected.

[0017] The beneficial effects of the present application relative to the prior art are: The electric cylinder reliability loading test device provided by the present application is suitable for the reliability loading test of hundreds or thousands of times of electric cylinders in a parameter range (the electric cylinder parameter range: load of 2t or less, stroke: 2m or less), the electric cylinder to be tested is accurately loaded through the counterweight, the floating of the traditional hydraulic cylinder loading value is avoided, the test efficiency can be greatly improved through the reliability test by the device, time cost is saved, the development of the electric cylinder test field of the company is a step towards intelligence, and the device is also an important embodiment for realizing cost reduction and efficiency increase in the field. BRIEF DESCRIPTION OF DRAWINGS

[0018] The present application will be further described in detail below with reference to the drawings: Figure 1 is a perspective view of the whole of the present application; Figure 2 is a front view of the whole of the present application; Figure 3 is Figure 2 is a local enlarged view of A in FIG. 1; Figure 4 is a structural schematic view of the base; Figure 5 is a structural schematic view of the first side frame; Figure 6 is a structural schematic view of the top beam; Figure 7 is a structural schematic view of the transfer trolley; Figure 8 is a structural schematic view of the lower guide rail beam; Figure 9 is a structural schematic view of the upper guide rail beam; Figure 10 is a connection schematic view of the lower guide rail beam and the ballast weight; Figure 11 is a connection schematic view of the upper guide rail beam and the ballast weight; Figure 12is a structural schematic view of a protective member; Figure 13 is a structural schematic view of an existing electric cylinder loading test device; Wherein, 1 is a base, 2 is a side frame, 3 is a top beam, 4 is an electric hoist, 5 is an upper guide rail beam, 6 is a lower guide rail beam, 7 is a ballast weight, 8 is a tension load weight, 9 is a to-be-tested electric cylinder, 10 is a tension and compression force sensor, 11 is a transfer trolley, 12 is a first base, 13 is a second base, 15 is a limiting strip, 16 is a first side frame, 17 is a second side frame, 18 is a guide rail, 19 is a top plate, 20 is a reinforcing rib plate, 21 is an upper side lifting lug, 22 is a protective seat, 23 is a protective rod, 24 is a placing plate, 25 is a baffle, 26 is a roller, 27 is an upper side mounting plate, 28 is an upper side guide block, 29 is a lower side mounting plate, 30 is a lower side guide block, 31 is an adapter, 32 is an upper side fixing plate, and 33 is a lower side lifting lug. DETAILED DESCRIPTION

[0019] In order to make the technical problems, technical solutions and beneficial effects of the present application clearer, the present application will be further described in detail in conjunction with the embodiments and drawings. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application. The technical solutions of the present application are described in detail below in conjunction with the embodiments and drawings, but the protection scope is not limited thereto.

[0020] As shown in Figure 1 Fig. 12, the present application provides an electric cylinder reliability loading test device, which comprises a base 1, two vertically symmetrical side frames 2 are fixedly arranged on the upper end of the base 1, a top beam 3 is fixedly arranged between the upper ends of the two side frames 2, and an electric hoist 4 is arranged at the lower end of the top beam 3; an upper guide rail beam 5 and a lower guide rail beam 6 are slidably arranged between the two side frames 2 along the vertical direction, a ballast weight 7 is arranged at the upper end of the upper guide rail beam 5, and a tension load weight 8 is arranged at the lower end of the lower guide rail beam 6; a to-be-tested electric cylinder 9 and a tension and compression force sensor 10 are arranged between the upper guide rail beam 5 and the lower guide rail beam 6; and a transfer trolley 11 is slidably arranged on the upper end of the base 1.

[0021] The base 1 comprises a first base 12 and a second base 13 which are fixedly connected to each other, and both the first base 12 and the second base 13 are kept horizontal, wherein the length direction of the first base 12 is arranged along the left-right direction, the length direction of the second base 13 is arranged along the front-rear direction, and the front end of the second base 13 is fixedly connected to the middle part of the rear end surface of the first base 12. One front-rear horizontal limiting strip 15 is fixedly arranged on each of the left and right sides of the upper end surface of the second base 13.

[0022] Each side frame 2 comprises a first side frame 16 and a second side frame 17, both of which are kept vertical, and the upper end of the first side frame 16 is fixedly connected with the lower end of the second side frame 17. The lower ends of the two first side frames 16 are fixedly connected with the left and right sides of the upper end surface of the first base 12 respectively. On the side end surface of the two first side frames 16 close to each other, a vertical guide rail 18 is fixedly arranged respectively.

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

[0024] On the side end surface of the two first side frames 16 close to each other, two sets of protection mechanisms are fixedly arranged respectively, and each set of protection mechanism comprises two protection pieces which are respectively located on the front and rear sides of the same side guide rail 18. The protection piece comprises a protection seat 22 and a protection rod 23, the protection seat 22 is screwed on the first side frame 16, and the protection rod 23 is kept horizontal, one end of the protection rod 23 is rotationally arranged on the protection seat 22. When the protection rod 23 is rotated to the front and rear angles, the upper guide rail beam 5 and the lower guide rail beam 6 can smoothly pass through the two sets of protection mechanisms. When the protection rod 23 is rotated to the left and right angles, the two sets of protection mechanisms on the lower side can protect the falling of the lower guide rail beam 6, and the two sets of protection mechanisms on the upper side can protect the falling of the upper guide rail beam 5.

[0025] The transfer trolley 11 comprises a placing plate 24, a baffle 25, and a roller 26. The placing plate 24 is a horizontally arranged square plate structure, and two front and rear distributed baffles 25 are fixedly arranged at the left and right ends of the placing plate 24 respectively, so as to limit the pulling load counterweight plate on the placing plate 24 through the baffles 25 on the left and right sides. One roller 26 is rotationally arranged at each of the four corners of the lower end surface of the placing plate 24, and the placing plate 24 is moved along the front and rear directions through the rollers 26. When the transfer trolley 11 moves to the upper end of the second base 13, the transfer trolley 11 is limited by the limiting strips 15 on the left and right sides.

[0026] The upper guide rail beam 5 comprises an upper mounting plate 27 and an upper guide block 28. The upper mounting plate 27 is a horizontally arranged square plate structure, and one upper guide block 28 is fixedly arranged at the middle of the left and right ends of the upper mounting plate 27 respectively, and the two upper guide blocks 28 are respectively slidingly connected with the guide rails 18 on the left and right sides. The pulling and pressing force sensor 10 is fixedly arranged at the center of the lower end surface of the upper mounting plate 27.

[0027] The lower guide rail beam 6 comprises a lower mounting plate 29 and a lower guide block 30, the lower mounting plate 29 is a horizontally arranged square plate structure, one lower guide block 30 is fixedly arranged at the middle of the left and right ends of the lower mounting plate 29 respectively, and the two lower guide blocks 30 are respectively slidably connected to the left and right guide rails 18. The tested electric cylinder 9 is kept vertical, one end of the cylinder body of the tested electric cylinder 9 is vertically downward and is fixedly connected to the center of the upper end surface of the lower mounting plate 29 through the adapter 31, and one end of the piston rod of the tested electric cylinder 9 is vertically upward and is fixedly connected to the tension and compression force sensor 10 through the adapter 31.

[0028] The ballast weight 7 is composed of a plurality of ballast weight plates stacked up and down, and the tension load weight 8 is composed of a plurality of tension load weight plates stacked up and down.

[0029] An upper fixing plate 32 is arranged at the upper end of the ballast weight 7, a lower lifting lug 33 is fixedly arranged at the center of the upper end surface of the upper fixing plate 32, and the hanging end of the electric hoist 4 is connected to the lower lifting lug 33. A plurality of fixed bolts pass through the upper mounting plate 27, the ballast weight plate and the fixed nut in sequence, so as to fixedly connect the ballast weight 7 and the upper guide rail beam 5. Two fixed bolts pass through the upper mounting plate 27, the ballast weight plate, the upper fixing plate 32 and the fixed nut in sequence, so as to fixedly connect the upper fixing plate 32 and the upper guide rail beam 5. The weight of the ballast weight 7 can be adjusted by fixing different number of ballast weight plates.

[0030] A plurality of fixed bolts pass through the tension load weight plate, the lower mounting plate 29 and the fixed nut in sequence, so as to fixedly connect the tension load weight 8 and the lower guide rail beam 6. The weight of the tension load weight 8 can be adjusted by fixing different number of tension load weight plates.

[0031] A group of proximity switches are fixedly arranged on the side end surfaces of the two first side frames 16 close to each other.

[0032] The specific use steps of the present application are as follows: S1 Preparation work before 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 tension load weight plates are placed on the placing plate 24 of the transfer trolley 11, so that the weight of the tension load weight 8 is consistent with the load of the tested electric cylinder 9.

[0033] S1.2 The operator pushes the transfer trolley 11, and moves the transfer trolley 11 from the second base 13 to the upper end of the first base 12, so that the transfer trolley 11 moves to the lower side of the lower guide rail beam 6 with the tension load weight plates, and then the tension load weight 8 is fixedly connected to the lower guide rail beam 6 by using the fixed bolts and the fixed nuts.

[0034] S1.3 Turn the two sets of protection rods 23 inside the protection mechanism on the upper side to the left and right angles. The four protection rods 23 support the upper guide rail beam 5 to prevent the upper guide rail beam 5 from falling. Then, the ballast weight 7 is fixedly connected with the upper guide rail beam 5 through the fixing bolt and the fixing nut. Then, the fixed end of the electric hoist 4 is connected with the upper side lifting lug 21 on the top beam 3, and the hanging end of the electric hoist 4 is connected with the lower side lifting lug 33 on the upper side fixed plate 32. The height of the upper guide rail beam 5 is adjusted by the electric hoist 4, so that the distance between the upper guide rail beam 5 and the lower guide rail beam 6 is consistent with the height of the electric cylinder 9 to be tested. Then, the electric cylinder 9 to be tested is installed between the upper guide rail beam 5 and the lower guide rail beam 6 through the upper and lower adapters 31, so that the upper side piston rod of the electric cylinder 9 to be tested is connected with the tension and compression force sensor 10.

[0035] S2 Single manual loading test S2.1 Control the piston rod of the electric cylinder 9 to be tested to extend, and lift the upper guide rail beam 5 and the ballast weight 7 upwards, thereby completing the ballast test.

[0036] S2.2 The ballast weight 7, the upper guide rail beam 5, the electric cylinder 9 to be tested, the lower guide rail beam 6 and the tension load weight 8 are lifted upwards by the electric hoist 4 to a certain height, so that the ballast weight 7 is away from the transfer trolley 11, and at this time the electric cylinder 9 to be tested has already borne the tension load.

[0037] S2.3 Control the piston rod of the electric cylinder 9 to be tested to retract, and pull the lower guide rail beam 6 and the tension load weight 8 upwards, thereby completing the tension test.

[0038] S3 Reliability test The information collection includes two parts: the proximity switch is arranged on the first side frame 16, the position of the proximity switch is reasonably arranged according to the stroke of the electric cylinder 9 to be tested, the position information of the piston rod of the electric cylinder 9 to be tested is collected, and the real-time load of the electric cylinder 9 to be tested is collected through the tension and compression force sensor 10 installed on the lower side of the upper guide rail beam 5.

[0039] S3.1 Control the piston rod of the electric cylinder 9 to be tested to extend, and extend to the position to complete the ballast test.

[0040] S3.2 The proximity switch collects the position information of the piston rod of the electric cylinder 9 to be tested, inputs the signal, and makes the electric hoist 4 lift the ballast weight 7, the upper guide rail beam 5, the electric cylinder 9 to be tested, the lower guide rail beam 6 and the tension load weight 8 upwards to a certain height.

[0041] S3.3 After the action is completed, input the signal to make the piston rod of the electric cylinder 9 to be tested retract, and complete the tension test.

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

[0043] The reliability test is completed by inputting the test times directly to the control panel. The process is mainly controlled by the position information of the electric cylinder 9, and the tension and pressure sensor 10 is responsible for monitoring the actual load of the electric cylinder 9. The electric cylinder 9 and the electric hoist 4 are jointly controlled through the program, and the dependence on the operator is eliminated.

[0044] It is obvious to those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, but can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. An electric cylinder reliability loading test device, characterized by: The base (1) includes a first base (12) and a second base (13), the front end of the second base (13) is fixedly connected with the middle part of the rear end face of the first base (12); a limiting strip (15) is fixedly arranged on the left and right sides of the upper end face of the second base (13); each side frame (2) includes a first side frame (16) and a second side frame (17), the upper end of the first side frame (16) is fixedly connected with the lower end of the second side frame (17); the lower ends of the two first side frames (16) are fixedly connected with the left and right sides of the upper end face of the first base (12); a vertical guide rail (18) is fixedly arranged on the side end face of each first side frame (16) which is close to each other.

2. The reliability loading test device for an electric cylinder according to claim 1, characterized by: The top beam (3) includes a top plate (19), a reinforcing rib plate (20) and an upper side lifting lug (21); the left and right ends of the lower end face of the top plate (19) are fixedly connected with the upper ends of the two second side frames (17), the reinforcing rib plate (20) is fixedly arranged on the upper end face of the top plate (19), the upper side lifting lug (21) is fixedly arranged at the center of the lower end face of the top plate (19), and the fixed end of the electric hoist (4) is connected with the upper side lifting lug (21).

3. The reliability loading test device for an electric cylinder according to claim 2, characterized by: The side end face of each first side frame (16) which is close to each other is fixedly provided with two groups of protection mechanisms, each group of protection mechanisms includes two protection pieces, and the two protection pieces are located on the front and rear sides of the guide rail (18) on the same side; the protection piece includes a protection seat (22) and a protection rod (23), the protection seat (22) is screwed on the first side frame (16), the protection rod (23) is horizontal, and one end of the protection rod (23) is rotatably arranged on the protection seat (22).

4. The reliability loading test device for an electric cylinder according to claim 2, characterized by: The transfer trolley (11) includes a placing plate (24), a baffle (25) and a roller (26); two front and rear baffles (25) are fixedly arranged on the left and right ends of the placing plate (24), and one roller (26) is rotatably arranged at each of the four corners of the lower end face of the placing plate (24).

5. The reliability loading test device for an electric cylinder according to claim 2, characterized by: The upper guide rail beam (5) includes an upper mounting plate (27) and an upper guide block (28), one upper guide block (28) is fixedly arranged on the middle part of the left and right ends of the upper mounting plate (27), and the two upper guide blocks (28) are slidably connected with the guide rails (18) on the left and right sides; the tensile and compressive force sensor (10) is fixedly arranged at the center of the lower end face of the upper mounting plate (27).

6. The reliability loading test device for an electric cylinder according to claim 2, characterized by: ​ 7. The reliability loading test device for an electric cylinder according to claim 6, characterized by: The lower guide rail beam (6) comprises a lower mounting plate (29) and a lower guide block (30), one of which is fixedly arranged at the middle of the left and right ends of the lower mounting plate (29), and the two lower guide blocks (30) are respectively slidably connected to the left and right guide rails (18); 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 surface of the lower mounting plate (29) through a adapter (31), and one end of the piston rod of the electric cylinder (9) is vertically upward and is fixedly connected to the tension and compression force sensor (10) through the adapter (31).

8. The reliability loading test device for an electric cylinder according to claim 7, characterized by: The ballast weight (7) is composed of a plurality of ballast weight plates stacked in up-down direction, and the tension load weight (8) is composed of a plurality of tension load weight plates stacked in up-down direction.

9. The reliability loading test device for an electric cylinder according to claim 8, characterized by: An upper fixing plate (32) is arranged at the upper end of the ballast weight (7), a lower lifting lug (33) is fixedly arranged at the center of the upper end surface of the upper fixing plate (32), and the suspension end of the electric hoist (4) is connected to the lower lifting lug (33); a plurality of fixing bolts are sequentially threaded through the upper mounting plate (27), the ballast weight plate and the fixing nut, and two fixing bolts are sequentially threaded through the upper mounting plate (27), the ballast weight plate, the upper fixing plate (32) and the fixing nut, so as to fixedly connect the upper fixing plate (32), the ballast weight (7) and the upper guide rail beam (5).

10. The reliability loading test device for an electric cylinder according to claim 8, characterized by: A plurality of fixing bolts are sequentially threaded through the tension load weight plate and the lower mounting plate (29) and are screwed with fixing nuts, so as to fixedly connect the tension load weight (8) and the lower guide rail beam (6).

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