Portable hydraulic pump station test bed

Abstract

The utility model relates to the technical field of test stands, and discloses a portable hydraulic pump station test stand which comprises a base station, a sliding groove A is formed in the middle of the top of the base station, sliding grooves B are formed in the positions, located on the two sides of the sliding groove A, of the top of the base station, and a stepping motor is fixedly installed at the position, coaxial with the sliding groove A, of one face of the base station. A workbench is slidably mounted in the sliding groove A and the sliding groove B. Clamping devices are symmetrically mounted at the top of the workbench, an air cylinder is fixedly mounted on one face of each clamping device, a pressure reducing valve is arranged below the end of each air cylinder, and a pressure adjusting knob is rotatably mounted in the middle of one face of each pressure reducing valve. A connecting pipe is connected between the pressure reducing valve and the input port of the air cylinder, the overload protection function is achieved through cooperation of the pressure reducing valve and the air cylinder, and the rapid and stable clamping effect is achieved.

Description

Technical Field

[0001] This utility model relates to the field of test bench technology, and in particular to a portable hydraulic pump station test bench. Background Technology

[0002] A hydraulic pump station is a hydraulic device consisting of a hydraulic pump, a drive motor, an oil tank, directional valves, throttle valves, relief valves, etc., or a hydraulic device including control valves. It supplies oil according to the flow direction, pressure, and flow rate required by the drive device. It is suitable for various machines where the drive device and the hydraulic station are separate. By connecting the hydraulic station to the drive device (cylinder or motor) with oil pipes, the hydraulic system can achieve various specified actions.

[0003] In the prior art, according to the utility model patent of a hydraulic pump station test bench with publication number CN221628576U, the motor in the rotating device drives the connecting column to rotate, the connecting column drives the incomplete gear to rotate, and the incomplete gear drives the gear to rotate 90 degrees. After the rotation is completed, the incomplete gear and the gear are no longer meshing. The gear drives the column to rotate, and the column drives the test bench to rotate, thus exchanging the positions of the hydraulic pump stations on both sides. When testing the hydraulic pump station at one end of the test bench, the next hydraulic pump station is picked up and fixed to the other end of the test bench. When changing the hydraulic pump station, the hydraulic pump station can be tested, which improves the working efficiency of the hydraulic pump station test bench. The clamping structure in the above device uses traditional bolt fixing, which has the problems of inconvenient adjustment and unstable clamping. Manual adjustment is still required during clamping, resulting in low precision and low degree of automation. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a convenient hydraulic pump station test bench, which has the advantages of pneumatic rapid clamping and precise displacement control, thus solving the problems mentioned in the background technology.

[0005] This utility model provides the following technical solution: a portable hydraulic pump station test bench, including a base, a sliding groove A is provided in the middle of the top of the base, and sliding grooves B are provided on both sides of the top of the base located on the sliding groove A. A stepper motor is fixedly installed on one side of the base at the coaxial center of the sliding groove A. A worktable is slidably installed inside the sliding groove A and the sliding groove B. A clamping device is symmetrically installed on the top of the worktable. A cylinder is fixedly installed on one side of the clamping device. A pressure reducing valve is provided below the end of the cylinder. A pressure adjusting knob is rotatably installed in the middle of one side of the pressure reducing valve. A connecting pipe connects the pressure reducing valve and the input port of the cylinder.

[0006] With the above-mentioned structure, the cylinder drives the clamping device to perform clamping work, clamping the hydraulic pump station located on the worktable surface. Because a pressure reducing valve is installed, the corresponding pressure can be adjusted for hydraulic pump stations with different housing strengths. The cooperation between the pressure reducing valve and the cylinder achieves the effect of overload protection.

[0007] Preferably, a threaded shaft is rotatably mounted inside the slide groove A, and the output shaft of the stepper motor is connected to the threaded shaft via a coupling. A slide shaft A is fixedly mounted between the two walls inside the slide groove B.

[0008] With the above structural setup, the worktable and the threaded shaft are threadedly matched, enabling precise position control, and the slide shaft A provides a limiting function for the worktable.

[0009] Preferably, a fixing block is fixedly installed at the bottom center of the worktable, the fixing block is sleeved on the outer ring of the threaded shaft, and the fixing block has a threaded groove inside that matches the thread of the outer ring of the threaded shaft. A sliding sleeve is symmetrically fixedly installed inside the sliding groove B at the bottom of the worktable, and a linear bearing A is fixedly installed inside the sliding sleeve. The linear bearing A is slidably sleeved on the outer ring of the sliding shaft A.

[0010] With the above structural setup, when the stepper motor drives the threaded shaft to rotate through the coupling, the threaded shaft and the fixed block are driven by the thread. At the same time, since the sliding sleeves on both sides are on the outer ring of the sliding shaft A, the operation of limiting sliding is realized.

[0011] Preferably, the clamping device includes a fixed plate, the cylinder is mounted on one side of the fixed plate, the clamping device is symmetrically provided with limiting blocks on the surface of the worktable, a sliding shaft B is fixedly connected between the two ends of one side of the fixed plate and the limiting blocks, a sliding strip is slidably sleeved on the outer ring of the sliding shaft B, the output shaft of the cylinder is fixedly connected to the middle of the sliding strip, a linear bearing B is fixedly sleeved inside the sliding strip, the linear bearing B is slidably sleeved on the outer ring of the sliding shaft B, and a sliding shaft C is symmetrically fixedly connected between the limiting blocks.

[0012] With the above structural configuration, the cylinder controls the position of the slide bar on the outer ring of the slide shaft B through the output shaft. At the same time, due to the setting of the linear bearing B, the friction between the slide shaft B and the slide bar can be reduced.

[0013] Preferably, a chuck is slidably mounted on the outer ring of the two sliding shafts C, and a linear bearing C is slidably mounted inside the chuck on the outer ring of the sliding shaft C. The linear bearing C and the chuck are fixedly sleeved together, and connecting rods are symmetrically and movably mounted on the upper and lower surfaces of the chuck and the upper and lower surfaces of the slide bar.

[0014] With the above structural design, the chuck slides on the outer ring of the sliding shaft C, which changes the straight thrust of the chuck into an oblique thrust, causing the chucks on both sides to retract towards the center. Since this device relies on pneumatic control, it improves the clamping speed of the hydraulic pump station.

[0015] Preferably, the chuck includes a slide block and a clamping head. The slide block is slidably mounted on the outer ring of the slide shaft C, and one side of the clamping head is provided with stepped grooves in a linear array.

[0016] With the above structural design, by driving the two clamps to retract inward, the corners of the hydraulic pump station are locked into the stepped groove. Since there are multiple stepped grooves, hydraulic pump stations of different sizes can be clamped.

[0017] This utility model has the following advantages:

[0018] 1. This portable hydraulic pump station test bench achieves rapid clamping through the installation of clamping devices, cylinders, and pressure reducing valves. When the cylinder is activated, its output shaft pushes a slide bar to slide on the outer ring of slide shaft B. The linear bearing B increases the sliding speed, reducing frictional loss between slide shaft B and the slide bar. As the slide bar slides, the chucks, positioned on the outer ring of slide shaft C, convert the direct thrust from the slide bar into a diagonal thrust, causing the two chucks on the outer ring of slide shaft C to rapidly retract inwards. The chucks clamp the corners of the hydraulic pump station casing through stepped grooves on one side. The installation of a pressure reducing valve, in conjunction with the cylinder, provides overload protection, resulting in rapid and stable clamping.

[0019] 2. This portable hydraulic pump station test bench achieves precise conveying and positioning by setting up a stepper motor, threaded shaft, worktable, and fixed block. After clamping, the stepper motor is started, and the stepper motor drives the threaded shaft to rotate through the coupling. Since the outer ring of the threaded shaft is adapted to the inner ring of the fixed block, the fixed block is driven to slide on the outer ring of the threaded shaft. At the same time, due to the restriction of the sliding grooves B on both sides and the sliding sleeve, the worktable slides smoothly on the surface of the base, achieving the effect of precise displacement positioning. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the internal structure of the base of this utility model;

[0022] Figure 3 This is a schematic diagram of the clamping device structure of this utility model;

[0023] Figure 4 This is an exploded view of the clamping device structure of this utility model.

[0024] In the diagram: 1. Base; 11. Slide A; 12. Slide B; 13. Stepper motor; 14. Threaded shaft; 15. Slide A; 2. Worktable; 21. Fixing block; 22. Sliding sleeve; 23. Linear bearing A; 3. Clamping device; 31. Fixing plate; 32. Limiting block; 33. Slide B; 34. Slide bar; 35. Linear bearing B; 36. Slide C; 37. Chuck; 371. Slide seat; 372. Clamping head; 373. Stepped groove; 38. Linear bearing C; 39. Connecting rod; 4. Cylinder; 5. Pressure reducing valve; 51. Pressure adjusting knob; 52. Connecting pipe. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figures 1-2 A portable hydraulic pump station test bench includes a base 1. A slide groove A11 is provided in the middle of the top of the base 1. Slide grooves B12 are provided on both sides of the top of the base 1 at the slide groove A11. A stepper motor 13 is fixedly installed on one side of the base 1 at the coaxial center of the slide groove A11. A worktable 2 is slidably installed inside the slide grooves A11 and B12. A clamping device 3 is symmetrically installed on the top of the worktable 2. A cylinder 4 is fixedly installed on one side of the clamping device 3. A pressure reducing valve 5 is provided below the end of the cylinder 4. A pressure adjusting knob 51 is rotatably installed in the middle of one side of the pressure reducing valve 5. A connecting pipe 52 is connected between the pressure reducing valve 5 and the input port of the cylinder 4. The other end of the pressure reducing valve 5 is connected to an external air source.

[0027] In practical applications, this device uses cylinder 4 to drive clamping device 3 to perform clamping work, clamping the hydraulic pump station located on the surface of workbench 2. By providing multiple stepped grooves 373, it can clamp hydraulic pump stations of different sizes during clamping work. Furthermore, due to the installation of pressure reducing valve 5, the corresponding pressure can be adjusted for hydraulic pump stations with different housing strengths. The cooperation between pressure reducing valve 5 and cylinder 4 achieves the effect of overload protection, avoiding the need to add pressure to the pump station housing.

[0028] Because the internal sliding component of this device is equipped with multiple linear bearings, friction and wear can be reduced and service life increased when the sliding component moves. In use, the linear bearings not only reduce friction, but also maintain the contraction force of the output shaft of cylinder 4, which will gradually decrease due to friction during long-term use.

[0029] Please see Figures 1-2 A threaded shaft 14 is rotatably mounted inside the slide groove A11. The output shaft of the stepper motor 13 is connected to the threaded shaft 14 via a coupling. A slide shaft A15 is fixedly mounted between the two walls inside the slide groove B12.

[0030] When the output shaft of the stepper motor 13 drives the threaded shaft 14 to rotate through the coupling, the position of the worktable 2 can be moved. Through the threaded fit between the worktable 2 and the threaded shaft 14, precise position control can be achieved. The sliding shaft A15 performs the limit function for the worktable 2.

[0031] Please see Figures 1-2 A fixing block 21 is fixedly installed at the bottom center of the worktable 2. The fixing block 21 is sleeved on the outer ring of the threaded shaft 14. The fixing block 21 has a threaded groove inside that matches the thread of the outer ring of the threaded shaft 14. A sliding sleeve 22 is symmetrically fixedly installed inside the sliding groove B12 at the bottom of the worktable 2. A linear bearing A23 is fixedly installed inside the sliding sleeve 22. The linear bearing A23 is slidably sleeved on the outer ring of the sliding shaft A15.

[0032] The driving force of the worktable 2 comes from the stepper motor 13 driving the threaded shaft 14 to rotate through the coupling. The threaded shaft 14 and the fixed block 21 are driven by the thread. At the same time, since the sliding sleeves 22 on both sides slide on the outer ring of the sliding shaft A15, the limiting sliding operation is realized, so that the worktable 2 can slide smoothly on the surface of the base 1.

[0033] Please see Figures 1-4 The clamping device 3 includes a fixed plate 31. The cylinder 4 is mounted on one side of the fixed plate 31. The clamping device 3 is symmetrically provided with limiting blocks 32 on the surface of the workbench 2. The two ends of one side of the fixed plate 31 are fixedly connected to the limiting blocks 32 with sliding shafts B33. The outer ring of the sliding shaft B33 is slidably sleeved with a sliding strip 34. The output shaft of the cylinder 4 is fixedly connected to the middle of the sliding strip 34. The sliding strip 34 is fixedly sleeved with a linear bearing B35. The linear bearing B35 is slidably sleeved on the outer ring of the sliding shaft B33. The limiting blocks 32 are symmetrically fixedly connected with sliding shafts C36.

[0034] The cylinder 4 controls the position of the slide bar 34 on the outer ring of the slide shaft B33 through the output shaft. At the same time, due to the setting of the linear bearing B35, the friction between the slide shaft B33 and the slide bar 34 can be reduced, making the slide bar 34 slide more smoothly.

[0035] Please see Figures 1-4 Two sliding shafts C36 have slidably mounted chucks 37 on their outer rings. Inside the chucks 37, a linear bearing C38 is slidably mounted on the outer ring of the sliding shafts C36. The linear bearing C38 and the chucks 37 are fixedly connected. Connecting rods 39 are symmetrically and movably mounted between the upper and lower surfaces of the chucks 37 and the upper and lower surfaces of the slide bar 34. The two ends of the connecting rods 39 are fixed in position by pins.

[0036] A connecting rod 39 is provided between the slide bar 34 and the chuck 37. The cylinder 4 pushes the slide bar 34, so that the straight thrust of the chuck 37 becomes an oblique thrust because the chuck 37 is slidably sleeved on the outer ring of the slide shaft C36, causing the chucks 37 on both sides to retract towards the middle. Since this device relies on pneumatic control, it improves the clamping speed of the hydraulic pump station, and the clamping accuracy is also improved compared to manual operation.

[0037] Please see Figures 1-4 The chuck 37 includes a slide 371 and a clamping head 372. The slide 371 is slidably mounted on the outer ring of the slide shaft C36. One side of the clamping head 372 has stepped grooves 373 evenly arranged in a linear array. In actual operation, the hydraulic pump station is located on the surface of the worktable 2. By driving the two chucks 37 to retract inward, the corners of the hydraulic pump station are engaged in the stepped grooves 373. Since there are multiple stepped grooves 373, hydraulic pump stations of different sizes can be clamped.

[0038] Clamping process: An external air source is connected to the cylinder 4 through a pressure reducing valve 5. Air is supplied to the pressure reducing valve 5 through the external air source. The pressure is adjusted by rotating the pressure regulating knob 51 so that the output force of the cylinder 4 can stably clamp the hydraulic pump station without damaging its outer shell. The hydraulic pump station is placed in the middle of the surface of the workbench 2. When the cylinder 4 outputs, it pushes the slide bar 34 to slide on the outer ring of the slide shaft B33. When the slide bar 34 slides, it drives the two chucks 37 on the outer ring of the slide shaft C36 to quickly retract inward through the connecting rod 39. The chucks 37 clamp the corners of the hydraulic pump station's outer shell through the stepped groove 373 on one side. This structure not only improves the clamping speed of the object, but also improves the clamping accuracy of the hydraulic pump station, realizing automated operation.

[0039] Displacement process: After clamping is completed, the stepper motor 13 is started. The stepper motor 13 drives the threaded shaft 14 to rotate through the coupling. Since the outer ring of the threaded shaft 14 is adapted to the inner ring thread of the fixed block 21, it can drive the fixed block 21 to slide on the outer ring of the threaded shaft 14. At the same time, due to the restriction of the sliding grooves B12 on both sides and the sliding sleeve 22, the worktable 2 slides smoothly on the surface of the base 1. The linear bearing A23 reduces the friction between the sliding sleeve 22 and the sliding shaft A15, and weakens the transmission force due to friction loss.

[0040] Working principle: During use, the hydraulic pump station to be tested is placed in the center of the workbench 2. The air pressure is adjusted by rotating the pressure regulating knob 51. The cylinder 4 is connected to the external air source through the pressure reducing valve 5. At this time, the cylinder 4 is started, and the output shaft of the cylinder 4 pushes the slide bar 34 to slide on the outer ring of the slide shaft B33. Due to the setting of the linear bearing B35, its sliding speed is increased, reducing the frictional loss between the slide shaft B33 and the slide bar 34. When the slide bar 34 slides, since the chuck 37 is slidably set on the outer ring of the slide shaft C36, the straight thrust from the slide bar 34 is changed into an oblique thrust, so that the two chucks... The chuck 37 rapidly retracts inward from the outer ring of the sliding shaft C36. The chuck 37 clamps the corner of the hydraulic pump station housing through the stepped groove 373 on one side. After clamping, the stepper motor 13 is started. The stepper motor 13 drives the threaded shaft 14 to rotate through the coupling. Since the outer ring of the threaded shaft 14 is adapted to the inner ring thread of the fixed block 21, the fixed block 21 is driven to slide on the outer ring of the threaded shaft 14. At the same time, due to the restriction of the sliding grooves B12 on both sides and the sliding sleeve 22, the worktable 2 slides smoothly on the surface of the base 1. Then, the existing testing equipment is used to test different data of the hydraulic pump station.

Claims

1. A portable hydraulic pump station test bench, comprising a base (1), characterized in that: The base (1) has a sliding groove A (11) in the middle of its top. The base (1) has sliding grooves B (12) on both sides of the sliding groove A (11). A stepper motor (13) is fixedly installed on one side of the base (1) at the coaxial center of the sliding groove A (11). A worktable (2) is slidably installed inside the sliding groove A (11) and the sliding groove B (12). A clamping device (3) is symmetrically installed on the top of the worktable (2). A cylinder (4) is fixedly installed on one side of the clamping device (3). A pressure reducing valve (5) is provided below the end of the cylinder (4). A pressure adjusting knob (51) is rotatably installed on the middle of one side of the pressure reducing valve (5). A connecting pipe (52) is connected between the pressure reducing valve (5) and the input port of the cylinder (4).

2. The portable hydraulic pump station test bench according to claim 1, characterized in that: A threaded shaft (14) is rotatably installed inside the slide groove A (11). The output shaft of the stepper motor (13) is connected to the threaded shaft (14) through a coupling. A sliding shaft A (15) is fixedly installed between the two walls inside the slide groove B (12).

3. The portable hydraulic pump station test bench according to claim 2, characterized in that: A fixing block (21) is fixedly installed at the bottom center of the workbench (2). The fixing block (21) is sleeved on the outer ring of the threaded shaft (14). The fixing block (21) has a threaded groove inside that matches the thread of the outer ring of the threaded shaft (14). A sliding sleeve (22) is symmetrically fixedly installed inside the sliding groove B (12) at the bottom of the workbench (2). A linear bearing A (23) is fixedly installed inside the sliding sleeve (22). The linear bearing A (23) is slidably sleeved on the outer ring of the sliding shaft A (15).

4. The portable hydraulic pump station test bench according to claim 3, characterized in that: The clamping device (3) includes a fixed plate (31), the cylinder (4) is mounted on one side of the fixed plate (31), the clamping device (3) is symmetrically provided with limiting blocks (32) on the surface of the workbench (2), the two ends of one side of the fixed plate (31) are fixedly connected to the limiting blocks (32) with a sliding shaft B (33), the outer ring of the sliding shaft B (33) is slidably sleeved with a slide bar (34), the output shaft of the cylinder (4) is fixedly connected to the middle of the slide bar (34), the slide bar (34) is fixedly sleeved with a linear bearing B (35), the linear bearing B (35) is slidably sleeved on the outer ring of the sliding shaft B (33), and the limiting blocks (32) are symmetrically fixedly connected with a sliding shaft C (36).

5. A portable hydraulic pump station test bench according to claim 4, characterized in that: The two sliding shafts C (36) are slidably mounted with a chuck (37) on their outer rings. A linear bearing C (38) is slidably mounted inside the chuck (37) on the outer ring of the sliding shaft C (36). The linear bearing C (38) and the chuck (37) are fixedly connected. A connecting rod (39) is symmetrically and movably mounted between the upper and lower surfaces of the chuck (37) and the upper and lower surfaces of the slide bar (34).

6. The portable hydraulic pump station test bench according to claim 5, characterized in that: The chuck (37) includes a slide (371) and a clamping head (372). The slide (371) is slidably mounted on the outer ring of the slide shaft C (36). One side of the clamping head (372) is provided with stepped grooves (373) in a linear array.

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