Hydraulic cylinder load simulation test bench

Abstract

The utility model discloses a hydraulic cylinder load simulation test bench in the technical field of hydraulic equipment. The test bench comprises a bench frame, and the top of the bench frame is provided with a bench surface; the rack is provided with a seat plate, a tested hydraulic cylinder is installed on the seat plate, and the seat plate is provided with a lifting assembly. The lifting assembly comprises a driving shaft, a reciprocating groove is formed in the driving shaft, a sliding seat is arranged on the periphery of the driving shaft, and a transmission block inserted into the reciprocating groove in a sliding mode is arranged on the sliding seat; a supporting block is arranged at the top of the sliding seat, a wedge-shaped block is arranged at the bottom of the seat plate, the wedge-shaped block is in sliding connection with the supporting block, an inclined face is arranged on the upper end face of the supporting block, and a wedge-shaped face is arranged at the bottom of the wedge-shaped block; a limiting plate is arranged at one end of the seat plate and is in contact with the front end of a cylinder barrel of the tested hydraulic cylinder; a pressing plate is mounted at the other end of the seat plate and is in contact with the rear end of a cylinder barrel of the tested hydraulic cylinder; and a bracket is arranged above the table top and is provided with a lower screw rod for pushing the pressing plate. The hydraulic cylinder detection device has the advantage of being capable of detecting hydraulic cylinders of different specifications.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic equipment, and particularly relates to a hydraulic cylinder load simulation test bench. Background Art

[0002] The prior art discloses a load simulation device for a hydraulic cylinder test bench and its control method, with the authorization announcement number CN103775437B and the authorization announcement date March 2, 2016. The device includes a test bench frame, a control system, a loading hydraulic cylinder and a tested hydraulic cylinder. The control system includes an industrial control computer, a PLC, a position system control module and a loading system control module. The industrial control computer sends a displacement signal to the PLC to drive the tested hydraulic cylinder to operate. The displacement sensor detects the displacement signal of the tested hydraulic cylinder, and on the one hand, feeds it back to the position system control module to adjust the displacement of the tested hydraulic cylinder, and on the other hand, sends it to the industrial control computer. The industrial control computer converts the displacement signal into a simulated force signal and sends it to the loading system control module to drive the loading hydraulic cylinder to perform counter-pressure loading on the tested hydraulic cylinder. At the same time, the tension and pressure sensor detects the tension and pressure signal, compares it with the simulated force signal and then feeds it back to the loading system control module to form a force negative feedback control.

[0003] However, there are mainly the following problems: Since there are many specifications and dimensions of hydraulic cylinders, and the test bench only detects hydraulic cylinders of one specification, the applicable range is very small. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a hydraulic cylinder load simulation test bench that can detect hydraulic cylinders of different specifications.

[0005] In order to achieve the above utility model purpose, the following technical solutions are adopted for the hydraulic cylinder load simulation test bench of the utility model:

[0006] A hydraulic cylinder load simulation test bench, including a bench frame, the top of the bench frame is set as a tabletop, on which a loading hydraulic cylinder, a hydraulic cylinder to be tested and a testing component are installed; the bench frame is provided with a seat plate that can be lifted, both ends of the seat plate are provided with first sliding blocks, the bench frame is provided with first sliding grooves, and the first sliding blocks are slidably installed in the first sliding grooves. The hydraulic cylinder to be tested is installed on the seat plate, and the seat plate is provided with a lifting component for driving its lifting; the lifting component includes a driving shaft rotatably installed on the bench frame, the driving shaft is arranged horizontally, the driving shaft is provided with a reciprocating groove, the outer circumference of the driving shaft is provided with a sliding seat that moves back and forth along its axial direction, and the sliding seat is provided with a transmission block slidably inserted into the reciprocating groove; the top of the sliding seat is provided with a support block, the bottom of the seat plate is provided with a wedge block, and the wedge block and the support block are slidably connected. The upper end surface of the support block is provided with an inclined surface, the bottom of the wedge block is provided with a wedge surface, and the wedge surface is in contact and cooperation with the inclined surface; one end of the seat plate is provided with a limiting plate, and the limiting plate is in contact with the front end of the cylinder barrel of the hydraulic cylinder to be tested; a pressing plate is slidably installed at the other end of the seat plate, and the pressing plate is in contact with the rear end of the cylinder barrel of the hydraulic cylinder to be tested; a bracket is arranged above the tabletop, and the bracket is provided with a lower screw rod for pushing the pressing plate, and the lower screw rod passes through the bracket horizontally and is threadedly engaged with the bracket.

[0007] Preferably, the testing component includes a tensile and compressive force sensor and a displacement sensor. The tensile and compressive force sensor is arranged between the output ends of the hydraulic cylinder to be tested and the loading hydraulic cylinder, and the displacement sensor is arranged on the tabletop and corresponds to the position of the output end of the hydraulic cylinder to be tested.

[0008] Preferably, the seat plate is provided with a lower pressing seat for supporting the lower end surface of the hydraulic cylinder to be tested, and the lower pressing seat is provided with a lower pressing groove; the bracket is provided with an upper screw rod, the upper screw rod passes through the bracket vertically and is threadedly engaged with the bracket, the lower end of the upper screw rod is provided with an upper pressing plate, the upper pressing plate is provided with an upper pressing seat, and the upper pressing seat is provided with an upper pressing groove for contacting the upper end surface of the hydraulic cylinder to be tested. Through the arrangement of the upper pressing seat and the lower pressing seat, the hydraulic cylinder to be tested is fixed in the up and down direction, which is suitable for fixing hydraulic cylinders of different specifications and sizes.

[0009] Preferably, the reciprocating groove includes two spiral grooves with opposite spirals, and both ends of the two spiral grooves are connected. Through the arrangement of the reciprocating groove, the sliding seat can slide back and forth along the length of the reciprocating groove, thereby realizing the lifting of the seat plate within a certain range, and the centering position adjustment is convenient.

[0010] Preferably, the wedge surface is provided with a third sliding groove, the cross section of the third sliding groove is set as a T shape, the inclined surface is provided with a third sliding block, and the third sliding block is slidably inserted into the third sliding groove.

[0011] Preferably, a plurality of reciprocating grooves are arranged on the driving shaft, the plurality of reciprocating grooves are arranged at intervals along the axial direction of the driving shaft, and a sliding seat is slidably installed on each reciprocating groove.

[0012] Preferably, the seat plate is provided with a second sliding groove facilitating the sliding installation of the pressing plate. The cross-section of the second sliding groove is T-shaped. The lower end of the pressing plate is provided with a second sliding block inserted into the second sliding groove, and the second sliding block is adapted to the second sliding groove.

[0013] Preferably, an upper handle is provided at the upper end of the upper screw rod passing through the bracket.

[0014] Preferably, a lower handle is provided at one end of the lower screw rod passing through the bracket.

[0015] Preferably, a rotating handle is provided at one end of the driving shaft passing through the bench.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] 1. In the present utility model, the hydraulic cylinder to be tested is installed on the seat plate and positioned by the limiting plates and the pressing plate arranged at both ends. Among them, the pressing plate can be slidably installed on the seat plate. Therefore, according to the size of the hydraulic cylinder to be tested, the lower screw rod can be driven to push the pressing plate, so as to position the hydraulic cylinder to be tested between the pressing plate and the limiting plate; then, the seat plate is driven to rise and fall through the lifting assembly until it is centered with the loading hydraulic cylinder, thus facilitating the installation of the test assembly. The overall design is reasonable, applicable to the detection of hydraulic cylinders of different specifications, improving the scope of application and having practicability.

[0018] 2. In the present utility model, by rotating the driving shaft from the side of the bench, the sliding seat slidably engaged with the driving shaft moves back and forth. Under the action of the wedge surface and the inclined surface, the lifting of the seat plate is realized, and the lifting operation is convenient, facilitating the centering installation of the hydraulic cylinder to be tested. Description of the Drawings

[0019] Figure 1 is a schematic structural diagram of the present utility model;

[0020] Figure 2 is Figure 1 an enlarged view of part A of

[0021] Figure 3 is an installation schematic diagram of the upper pressing seat, the hydraulic cylinder to be tested, and the lower pressing seat;

[0022] Figure 4 is a schematic diagram of the sliding installation of the pressing plate on the seat plate;

[0023] Figure 5 is a three-dimensional view of the wedge block;

[0024] Figure 6 is a three-dimensional view of the support block.

[0025] Among them, 1 frame, 101 tabletop, 2 lower handle, 3 lower screw rod, 4 second sliding groove, 5 bracket, 6 upper handle, 7 upper screw rod, 8 pressing plate, 9 hydraulic cylinder to be tested, 10 upper pressing plate, 11 upper pressing seat, 11a upper pressing groove, 12 limiting plate, 13 tension and compression sensor, 14 displacement sensor, 15 loading hydraulic cylinder, 16 seat plate, 17 drive shaft, 18 rotating handle, 19 first sliding groove, 20 sliding seat, 21 first sliding block, 22 wedge surface, 23 wedge block, 24 third sliding block, 25 support block, 26 transmission block, 27 reciprocating groove, 28 lower pressing seat, 28a lower pressing groove, 29 second sliding block, 30 third sliding groove, 31 inclined surface. Specific embodiments

[0026] The following further clarifies the present invention in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. After reading the present invention, various equivalent forms of modification by those skilled in the art fall within the scope defined by the appended claims of this application.

[0027] Such as Figures 1-6As shown in the figure, a hydraulic cylinder load simulation test bench includes a bench 1. The top of the bench 1 is provided with a tabletop 101. A loading hydraulic cylinder 15, a hydraulic cylinder 9 to be tested, and a test component are installed on the tabletop 101. The test component includes a tensile and compressive force sensor 13 and a displacement sensor 14. The tensile and compressive force sensor 13 is arranged between the output ends of the hydraulic cylinder 9 to be tested and the loading hydraulic cylinder 15. The displacement sensor 14 is arranged on the tabletop 101 at a position corresponding to the output end of the hydraulic cylinder 9 to be tested. The bench 1 is provided with a seat plate 16 that can be lifted and lowered. Both ends of the seat plate 16 are provided with first sliding blocks 21. The bench 1 is provided with a first sliding groove 19. The first sliding blocks 21 are slidably installed in the first sliding groove 19. The hydraulic cylinder 9 to be tested is installed on the seat plate 16. The seat plate 16 is provided with a lifting component for driving its lifting and lowering. The lifting component includes a driving shaft 17 rotatably installed on the bench 1. The driving shaft 17 is arranged horizontally. One end of the driving shaft 17 passing through the bench 1 is provided with a rotary handle 18. The driving shaft 17 is provided with a reciprocating groove 27. The reciprocating groove 27 includes two helical grooves with opposite helical directions. The two ends of the two helical grooves are connected. The outer circumference of the driving shaft 17 is provided with a sliding seat 20 that moves back and forth along its axial direction. The sliding seat 20 is provided with a transmission block 26 slidably inserted into the reciprocating groove 27. A plurality of reciprocating grooves 27 are arranged on the driving shaft 17. The plurality of reciprocating grooves 27 are arranged at intervals along the axial direction of the driving shaft 17. A sliding seat 20 is slidably installed on each reciprocating groove 27. The top of the sliding seat 20 is provided with a support block 25. The bottom of the seat plate 16 is provided with a wedge block 23. The wedge block 23 is slidably connected with the support block 25. The upper end surface of the support block 25 is provided with an inclined surface 31. The bottom of the wedge block 23 is provided with a wedge surface 22. The wedge surface 22 is in contact and cooperation with the inclined surface 31. The wedge surface 22 is provided with a third sliding groove 30. The cross-section of the third sliding groove 30 is set to be T-shaped. The inclined surface 31 is provided with a third sliding block 24. The third sliding block 24 is slidably inserted into the third sliding groove 30. One end of the seat plate 16 is provided with a limit plate 12. The limit plate 12 is in contact with the front end of the cylinder barrel of the hydraulic cylinder 9 to be tested. The other end of the seat plate 16 is slidably installed with a pressing plate 8. The pressing plate 8 is in contact with the rear end of the cylinder barrel of the hydraulic cylinder 9 to be tested. The seat plate 16 is provided with a second sliding groove 4 for facilitating the sliding installation of the pressing plate 8. The cross-section of the second sliding groove 4 is set to be T-shaped. The lower end of the pressing plate 8 is provided with a second sliding block 29 inserted into the second sliding groove 4. The second sliding block 29 is adapted to the second sliding groove 4. Above the tabletop 101, there is a bracket 5. The bracket 5 is provided with a lower screw rod 3 for pushing the pressing plate 8. The lower screw rod 3 passes through the bracket 5 horizontally and is threadedly engaged with the bracket 5. One end of the lower screw rod 3 passing through the bracket 5 is provided with a lower handle 2. The seat plate 16 is provided with a lower pressing seat 28 for supporting the lower end surface of the hydraulic cylinder 9 to be tested. The lower pressing seat 28 is provided with a lower pressing groove 28a. The bracket 5 is provided with an upper screw rod 7. The upper screw rod 7 passes through the bracket 5 vertically and is threadedly engaged with the bracket 5. The upper end of the upper screw rod 7 passing through the bracket 5 is provided with an upper handle 6. The lower end of the upper screw rod 7 is provided with an upper pressing plate 10. The upper pressing plate 10 is provided with an upper pressing seat 11. The upper pressing seat 11 is provided with an upper pressing groove 11a for contacting the upper end surface of the hydraulic cylinder 9 to be tested.

[0028] Specific working process and principle of the utility model: When it is necessary to detect the tested hydraulic cylinder 9, first, according to the size of the tested hydraulic cylinder 9, drive the lower screw rod 3 to push the pressing plate 8, so as to position the tested hydraulic cylinder 9 between the pressing plate 8 and the limiting plate 12; then, drive the seat plate 16 to lift and lower through the lifting assembly until it is centered with the loading hydraulic cylinder 15. Finally, drive the upper screw rod 7 to push the upper pressing seat 11 to press against the upper end of the tested hydraulic cylinder 9. At this time, the cup test hydraulic cylinder is fixed on the seat plate 16. Among them, for the lifting operation, rotate the drive shaft 17 from the side of the bench 1, so that the sliding seat 20 slidably fitted on the drive shaft 17 reciprocates back and forth. Under the action of the wedge surface 22 and the inclined surface 31, the lifting of the seat plate 16 is realized. And due to the arrangement of the reciprocating groove 27, the sliding seat 20 can slide back and forth along the length of the reciprocating groove 27, thereby realizing the lifting of the seat plate 16 within a certain range, and the centering position adjustment is more convenient. When the position of the tested hydraulic cylinder 9 is adjusted, at this time, install the tensile and compressive force sensor 13 between the output ends of the tested hydraulic cylinder 9 and the loading hydraulic cylinder 15, and set the displacement sensor 14 at the position of the table top 101 corresponding to the output end of the tested hydraulic cylinder 9, so as to realize the detection.

[0029] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front", "center", "both ends", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model.

[0030] In the present utility model, unless otherwise clearly specified and limited, the terms "installed", "set", "connected", "fixed", "swivelly connected", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. It can be the communication inside two elements or the interaction relationship between two elements. Unless otherwise clearly limited, for those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0031] The above description shows and describes the preferred embodiments of the present utility model. As previously mentioned, it should be understood that the present utility model is not limited to the form disclosed herein, should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described herein through the above teachings or the techniques or knowledge in the relevant field. Any alterations and changes made by those skilled in the art without departing from the spirit and scope of the present utility model shall fall within the protection scope of the appended claims of the present utility model.

Claims

1. A hydraulic cylinder load simulation test bench, comprising a bench frame, the top of the bench frame is set as a tabletop, and a loading hydraulic cylinder, a hydraulic cylinder to be tested and a test component are installed on the tabletop; it is characterized in that: The test bench is provided with a seat plate that can be lifted and lowered. First sliding blocks are provided at both ends of the seat plate, and the test bench is provided with first sliding grooves. The first sliding blocks are slidably installed in the first sliding grooves. The hydraulic cylinder to be tested is installed on the seat plate, and the seat plate is provided with a lifting assembly for driving its lifting and lowering; the lifting assembly includes a drive shaft rotatably installed on the test bench. The drive shaft is arranged horizontally. The drive shaft is provided with a reciprocating groove, and a sliding seat that moves back and forth along the axial direction of the drive shaft is provided on the outer periphery of the drive shaft. The sliding seat is provided with a transmission block slidably inserted into the reciprocating groove; a support block is provided at the top of the sliding seat, and a wedge block is provided at the bottom of the seat plate. The wedge block is slidably connected to the support block. An inclined surface is provided on the upper end surface of the support block, and a wedge surface is provided at the bottom of the wedge block. The wedge surface is in contact and cooperation with the inclined surface; a limit plate is provided at one end of the seat plate, and the limit plate is in contact with the front end of the cylinder barrel of the hydraulic cylinder to be tested; a pressing plate is slidably installed at the other end of the seat plate, and the pressing plate is in contact with the rear end of the cylinder barrel of the hydraulic cylinder to be tested; a bracket is provided above the tabletop, and the bracket is provided with a lower screw rod for pushing the pressing plate. The lower screw rod passes through the bracket horizontally and is in threaded connection with the bracket.

2. The hydraulic cylinder load simulation test bench according to claim 1, wherein: The test assembly includes a tensile and compressive force sensor and a displacement sensor. The tensile and compressive force sensor is arranged between the output end of the hydraulic cylinder to be tested and the output end of the loading hydraulic cylinder, and the displacement sensor is arranged on the tabletop and corresponds to the position of the output end of the hydraulic cylinder to be tested.

3. The hydraulic cylinder load simulation test bench according to claim 1, characterized in that: The seat plate is provided with a lower pressing seat for supporting the lower end surface of the hydraulic cylinder to be tested, and the lower pressing seat is provided with a lower pressing groove; the bracket is provided with an upper screw rod. The upper screw rod passes through the bracket vertically and is in threaded connection with the bracket. The lower end of the upper screw rod is provided with an upper pressing plate, and the upper pressing plate is provided with an upper pressing seat. The upper pressing seat is provided with an upper pressing groove for contacting the upper end surface of the hydraulic cylinder to be tested.

4. The hydraulic cylinder load simulation test bench according to claim 1, characterized in that: The reciprocating groove includes two spiral grooves with opposite spirals, and the two ends of the two spiral grooves are connected and communicated.

5. The hydraulic cylinder load simulation test bench according to claim 1, characterized in that: The wedge surface is provided with a third sliding groove, and the cross section of the third sliding groove is set to be T-shaped. The inclined surface is provided with a third sliding block, and the third sliding block is slidably inserted into the third sliding groove.

6. The hydraulic cylinder load simulation test bench according to claim 1, wherein: A plurality of reciprocating grooves are provided on the drive shaft, and the plurality of reciprocating grooves are arranged at intervals along the axial direction of the drive shaft. A sliding seat is slidably installed on each reciprocating groove.

7. The hydraulic cylinder load simulation test bench according to claim 1, characterized in that: The seat plate is provided with a second sliding groove for facilitating the sliding installation of the pressing plate. The cross section of the second sliding groove is set to be T-shaped. The lower end of the pressing plate is provided with a second sliding block inserted into the second sliding groove, and the second sliding block is adapted to the second sliding groove.

8. The hydraulic cylinder load simulation test bench according to claim 3, characterized in that: The upper end of the upper screw rod passing through the bracket is provided with an upper handle.

9. The hydraulic cylinder load simulation test bench according to claim 1, characterized in that: One end of the lower screw rod passing through the bracket is provided with a lower handle.

10. The hydraulic cylinder load simulation test bench according to claim 1, wherein: One end of the drive shaft passing through the test bench is provided with a rotary handle.

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