Air cylinder airtightness detection equipment

Abstract

The utility model discloses a cylinder airtightness detection device, which comprises a machine table and a water tank fixed at the front end of the machine table, lifting mechanisms are embedded in the left and right sides of the rear part of the upper end of the water tank, a bidirectional threaded rod mechanism is arranged between the upper parts of the lifting mechanisms, and two groups of positioning mechanisms are arranged at the front part of the bidirectional threaded rod mechanism. The positioning mechanism comprises a connecting plate, a concave frame, a sliding seat, a clamping plate, a second motor and a second bidirectional threaded rod, the connecting plate is connected with the bidirectional threaded rod mechanism, the concave frame is fixed at the front end of the connecting plate, and the sliding seat is fixed at the lower end of the concave frame. The second two-way threaded rod is arranged at the upper left corner of the clamping plates, so that after the positioning mechanism enters water of the water tank, the second two-way threaded rod does not need to enter the water, the second two-way threaded rod is not stained with water and is not prone to rusting, meanwhile, the second two-way threaded rod is in threaded fit with the two clamping plates, and the clamping plates clamp the to-be-detected air cylinder; therefore, the positioning of the to-be-detected cylinder is not affected, and the service life of the positioning mechanism is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of air leakage detection, and more specifically to a cylinder air tightness detection device. Background Art

[0002] The cylinder is composed of a cylinder barrel, an end cover, a piston, a piston rod and a seal. The end cover is provided with an air inlet and exhaust port (referred to as an air port) for connecting a pneumatic source. By changing the air pressure in the two chambers in the cylinder barrel, the movement of the piston and the piston rod is controlled and driven. Therefore, the air tightness of the cylinder directly affects the quality of the cylinder. Therefore, the cylinder must be tested for air tightness after production to ensure whether the quality of the cylinder is qualified.

[0003] The current cylinder air tightness testing equipment is equipped with a positioning component on a workbench. The positioning component includes two clamping plates and a tension spring. The tension spring pulls the respective fixed clamping plates to move toward the center of the two clamping plates until the cylinder to be tested is clamped. However, the cylinder to be tested needs to be placed in a water tank, so the tension spring also needs to be placed in the water of the water tank, which makes the tension spring easily rusty, thereby affecting the positioning effect of the cylinder to be tested. Utility Model Content

[0004] The purpose of the utility model is to overcome the defects of the prior art and provide a cylinder air tightness detection device to solve the problems existing in the above-mentioned background technology.

[0005] The cylinder air tightness detection equipment comprises a machine platform and a water tank fixed at the front end thereof, a lifting mechanism is embedded and installed on the left and right sides of the rear upper end of the water tank, a two-way threaded rod mechanism is installed between the upper parts of the lifting mechanism, two sets of positioning mechanisms are installed at the front part of the two-way threaded rod mechanism, the positioning mechanism comprises a connecting plate, a concave frame, a sliding seat, a clamping plate, a second motor, and a second two-way threaded rod, the connecting plate is connected to the two-way threaded rod mechanism, the concave frame is fixed at the front end of the connecting plate, the sliding seat is fixed at the lower end of the concave frame, the clamping plate has a pair and is slidably connected to the front and rear sides of the upper end of the sliding seat respectively, the second two-way threaded rod passes through and is threadedly connected between the upper left corner of the clamping plate, the second two-way threaded rod is rotatably connected to the inner wall of the concave frame, the second motor is fixedly installed at the rear end of the concave frame, the output end of the second motor is connected to the second two-way threaded rod, and a detection mechanism is installed on the concave frame.

[0006] Furthermore, the lifting mechanism includes a first cylinder and a first piston rod, the first cylinder is embedded in the water tank, and the first piston rod is connected to the first cylinder.

[0007] Furthermore, the bidirectional threaded rod mechanism includes a side seat, a moving seat, a first bidirectional threaded rod and a first motor, the side seat has a pair and is respectively fixed on the upper ends of the two first piston rods, the first bidirectional threaded rod is rotatably connected between the side seats, the first motor is fixedly installed at the left end of the side seat on the left side, the output end of the first motor is connected to the first bidirectional threaded rod, the moving seat has a pair and is respectively threadedly connected to the left and right sides of the outside of the first bidirectional threaded rod, and the rear end of the moving seat is slidably connected to the front end of the machine.

[0008] Furthermore, the rear end of the connecting plate is fixed in a one-to-one correspondence with the front end of the movable seat.

[0009] Furthermore, the detection mechanism includes a second cylinder, a second piston rod, a two-position three-way valve, a connecting pipe and an exhaust pipe, the second cylinder is fixedly mounted on the upper end of the concave frame, the second piston rod is connected in the second cylinder, the lower end of the second piston rod passes through the inner side of the concave frame and is fixedly mounted on the two-position three-way valve, the exhaust pipe is connected to the air inlet end of the two-position three-way valve, and the connecting pipe is connected to the exhaust end of the two-position three-way valve.

[0010] Furthermore, a button panel is installed at the front end of the water tank, and buttons for controlling the first cylinder, the first motor, the second motor and the second cylinder are installed at the front end of the button panel.

[0011] Furthermore, a slider is fixed at the lower end of the clamping plate, the slider is slidably connected to the inner side of the slide seat, a guide rod is fixed to the inner side of the slide seat, and the guide rod and the slider are movably interpenetrating.

[0012] Beneficial effect: by setting the second bidirectional threaded rod at the upper left corner of the clamp plate, after the positioning mechanism enters the water in the sink, the second bidirectional threaded rod does not need to enter the water, so the second bidirectional threaded rod does not get wet and is not easy to rust. At the same time, the second bidirectional threaded rod cooperates with the threads of the two clamp plates, so that the clamp plates clamp the cylinder to be tested, thereby not affecting the positioning of the cylinder to be tested, thereby improving the service life of the positioning mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is an overall schematic diagram of the utility model;

[0014] Figure 2 This is a schematic diagram of the lifting mechanism of the utility model;

[0015] Figure 3 It is a schematic diagram of the positioning mechanism of the utility model.

[0016] In the figure: 1-machine table, 2-water tank, 3-button panel, 4-lifting mechanism, 41-first cylinder, 42-first piston rod, 5-bidirectional threaded rod mechanism, 51-side seat, 52-moving seat, 53-first bidirectional threaded rod, 54-first motor, 6-positioning mechanism, 61-connecting plate, 62-concave frame, 63-sliding seat, 64-clamping plate, 65-sliding block, 66-guide rod, 67-second motor, 68-second bidirectional threaded rod, 7-detection mechanism, 71-second cylinder, 72-second piston rod, 73-two-position three-way valve, 74-connecting pipe, 75-exhaust pipe. DETAILED DESCRIPTION

[0017] See also Figure 1-Figure 3 The cylinder air tightness detection equipment includes a machine platform 1 and a water tank 2 fixed at the front end thereof, and a lifting mechanism 4 is embedded and installed on both sides of the upper rear end of the water tank 2. The lifting mechanism 4 includes a first cylinder 41 and a first piston rod 42. The first cylinder 41 is embedded and installed with the water tank 2, and the first piston rod 42 is connected to the first cylinder 41. Through the first cylinder 41, the first piston rod 42 can be lifted up and down.

[0018] A bidirectional threaded rod mechanism 5 is installed between the upper parts of the lifting mechanism 4, and the bidirectional threaded rod mechanism 5 includes a side seat 51, a moving seat 52, a first bidirectional threaded rod 53 and a first motor 54. The side seat 51 has a pair of and is respectively fixed on the upper ends of the two first piston rods 42. The first bidirectional threaded rod 53 is rotatably connected between the side seats 51. The first motor 54 is fixedly installed at the left end of the side seat 51 on the left side. The output end of the first motor 54 is connected to the first bidirectional threaded rod 53. The moving seat 52 has a pair of and is respectively threadedly connected to the upper ends of the two first piston rods 42. On the left and right sides of the outside of the first bidirectional threaded rod 53, the rear end of the moving seat 52 is slidably connected to the front end of the machine 1. When the first piston rod 42 is lifted or lowered, the side seat 51 can be driven to move synchronously, so that the moving seat 52, the first bidirectional threaded rod 53 and the first motor 54 will be lifted or lowered synchronously, and the first motor 54 will drive the first bidirectional threaded rod 53 to rotate forward or reverse. As the first bidirectional threaded rod 53 is threadedly matched with the two moving seats 52, the moving seats 52 are opened or closed, so that the moving seat 52 slides along the front of the machine 1.

[0019] Two sets of positioning mechanisms 6 are installed at the front of the bidirectional threaded rod mechanism 5, and the positioning mechanism 6 includes a connecting plate 61, a concave frame 62, a slide seat 63, a clamping plate 64, a second motor 67, and a second bidirectional threaded rod 68. The connecting plate 61 is connected to the bidirectional threaded rod mechanism 5, and the rear end of the connecting plate 61 is fixed in a one-to-one correspondence with the front end of the moving seat 52. The concave frame 62 is fixed to the front end of the connecting plate 61, and the slide seat 63 is fixed to the lower end of the concave frame 62. The clamping plate 64 has a pair and is slidably connected to the front and rear sides of the upper end of the slide seat 63, respectively. The second bidirectional threaded rod 68 passes through and is threadedly connected between the upper left corner of the clamping plate 64. The second The bidirectional threaded rod 68 is rotatably connected to the inner wall of the concave frame 62, and the second motor 67 is fixedly installed at the rear end of the concave frame 62. The output end of the second motor 67 is connected to the second bidirectional threaded rod 68. When the moving seat 52 moves, it can drive the connecting plate 61 to move synchronously, and the connecting plate 61 will drive the concave frame 62 and the slide seat 63 to move. The cylinder to be detected is located above the slide seat 63 and between the clamping plates 64. Then, the second motor 67 can drive the second bidirectional threaded rod 68 to rotate. As the second bidirectional threaded rod 68 is threadedly matched with the two clamping plates 64, the clamping plates 64 are closed in distance to clamp and position the cylinder to be detected.

[0020] A slider 65 is fixed to the lower end of the splint 64, and the slider 65 is slidably connected to the inner side of the slide seat 63. A guide rod 66 is fixed to the inner side of the slide seat 63, and the guide rod 66 and the slider 65 are movably connected. When the splint 64 slides, it will drive the slider 65 to slide on the inner side of the slide seat 63, and the slider 65 will slide along the guide rod 66, thereby guiding and limiting the splint 64.

[0021] The concave frame 62 is provided with a detection mechanism 7, which includes a second cylinder 71, a second piston rod 72, a two-position three-way valve 73, a connecting pipe 74 and an exhaust pipe 75. The second cylinder 71 is fixedly mounted on the upper end of the concave frame 62, the second piston rod 72 is connected in the second cylinder 71, the lower end of the second piston rod 72 passes through the inner side of the concave frame 62 and is fixedly mounted on the two-position three-way valve 73, the exhaust pipe 75 is connected to the air inlet end of the two-position three-way valve 73, the connecting pipe 74 is connected to the exhaust end of the two-position three-way valve 73, and when the clamping plate 64 clamps After the cylinder to be tested is tightly positioned, the second cylinder 71 can drive the second piston rod 72 to move downward, and the second piston rod 72 can drive the two-position three-way valve 73 to move downward. After the two-position three-way valve 73 drives the connecting pipe 74 to move downward and connect with the air inlet of the cylinder to be tested, the gas can be transported into the cylinder to be tested through the exhaust pipe 75. In this way, when the cylinder to be tested is in the water tank 2, the tester can observe the movement of the piston rod of the cylinder to be tested and the bubbles around the cylinder to be tested. When the piston rod remains stationary and there are no bubbles in the water tank, the air tightness of the cylinder to be tested can be ensured to be good.

[0022] A button panel 3 is installed at the front end of the water tank 2 , and buttons for controlling the first cylinder 41 , the first motor 54 , the second motor 67 and the second cylinder 71 are installed at the front end of the button panel 3 .

[0023] Working principle: First, the first cylinder 41 makes the concave frame 62 rise, and then the first motor 54 drives the first bidirectional threaded rod 53 to rotate, as the first bidirectional threaded rod 53 is threadedly matched with the two moving seats 52, the moving seats 52 are pulled apart or closed, so as to adjust the distance between the concave frames 62 according to the length of the cylinder to be detected, and then the cylinder to be detected is horizontally placed above the slide seat 63 of the concave frame 62, and the cylinder to be detected is located between the clamping plates 64, and then the second motor 67 can drive the second bidirectional threaded rod 68 to rotate, as the second bidirectional threaded rod 68 is threadedly matched with the two clamping plates 64, the clamping plates 64 are closed to clamp and position the cylinder to be detected, and then the second cylinder 71 can drive the second piston rod 72 to move downward, and the second piston rod 72 drives the two-position three-way valve 73 moves downward, so that the two-position three-way valve 73 drives the connecting pipe 74 to move downward and connect with the air inlet of the cylinder to be detected, and then the concave frame 62 is lowered by the first cylinder 41 until the cylinder to be detected enters the water in the water tank 2, and the gas can be transported into the cylinder to be detected through the exhaust pipe 75. In this way, when the cylinder to be detected is in the water tank 2, the inspector can observe the movement of the piston rod of the cylinder to be detected and the air bubbles around the cylinder to be detected. When the piston rod remains stationary and there are no bubbles in the water tank, the air tightness of the cylinder to be detected can be ensured to be good. In this way, by arranging the second two-way threaded rod 68 at the upper left corner of the splint 64, after the positioning mechanism 6 enters the water in the water tank 2, the second two-way threaded rod 68 does not need to enter the water. In this way, the second two-way threaded rod 68 does not get wet and is not easy to rust, thereby improving the service life of the positioning mechanism 6.

Claims

1. A cylinder air tightness testing device, comprising a machine platform (1) and a water tank (2) fixed at the front end thereof, characterized in that: A lifting mechanism (4) is embedded and installed on both left and right sides of the rear upper end of the water tank (2); a bidirectional threaded rod mechanism (5) is installed between the upper parts of the lifting mechanism (4); two sets of positioning mechanisms (6) are installed at the front of the bidirectional threaded rod mechanism (5); the positioning mechanism (6) comprises a connecting plate (61), a concave frame (62), a sliding seat (63), a clamping plate (64), a second motor (67), and a second bidirectional threaded rod (68); the connecting plate (61) is connected to the bidirectional threaded rod mechanism (5); the concave frame (62) is fixed to the front end of the connecting plate (61) The slide seat (63) is fixed at the lower end of the concave frame (62), the clamping plate (64) has a pair and is slidably connected to the front and rear sides of the upper end of the slide seat (63), the second bidirectional threaded rod (68) passes through and is threadedly connected between the upper left corners of the clamping plate (64), the second bidirectional threaded rod (68) is rotatably connected to the inner wall of the concave frame (62), the second motor (67) is fixedly installed at the rear end of the concave frame (62), the output end of the second motor (67) is connected to the second bidirectional threaded rod (68), and a detection mechanism (7) is installed on the concave frame (62).

2. The cylinder air tightness detection device according to claim 1, characterized in that: The lifting mechanism (4) comprises a first cylinder (41) and a first piston rod (42); the first cylinder (41) is embedded and installed in the water tank (2); and the first piston rod (42) is connected to the first cylinder (41).

3. The cylinder air tightness detection device according to claim 2, characterized in that: The bidirectional threaded rod mechanism (5) comprises a side seat (51), a moving seat (52), a first bidirectional threaded rod (53) and a first motor (54); the side seat (51) has a pair of and is respectively fixed to the upper ends of the two first piston rods (42); the first bidirectional threaded rod (53) is rotatably connected between the side seats (51); the first motor (54) is fixedly mounted on the left end of the side seat (51) on the left side; the output end of the first motor (54) is connected to the first bidirectional threaded rod (53); the moving seat (52) has a pair of and is respectively threadedly connected to the left and right sides of the outside of the first bidirectional threaded rod (53); the rear end of the moving seat (52) is slidably connected to the front end of the machine platform (1).

4. The cylinder air tightness detection device according to claim 3, characterized in that: The rear end of the connecting plate (61) is fixed to the front end of the movable seat (52) in a one-to-one correspondence.

5. The cylinder air tightness detection device according to claim 4, characterized in that: The detection mechanism (7) comprises a second cylinder (71), a second piston rod (72), a two-position three-way valve (73), a connecting pipe (74) and an exhaust pipe (75); the second cylinder (71) is fixedly mounted on the upper end of the concave frame (62); the second piston rod (72) is connected to the second cylinder (71); the lower end of the second piston rod (72) passes through the inner side of the concave frame (62) and is fixedly mounted on the two-position three-way valve (73); the exhaust pipe (75) is connected to the air inlet end of the two-position three-way valve (73); and the connecting pipe (74) is connected to the exhaust end of the two-position three-way valve (73).

6. The cylinder air tightness detection device according to claim 5, characterized in that: A button panel (3) is installed at the front end of the water tank (2), and buttons for controlling the first cylinder (41), the first motor (54), the second motor (67) and the second cylinder (71) are installed at the front end of the button panel (3).

7. The cylinder air tightness detection device according to claim 1, characterized in that: A slider (65) is fixed at the lower end of the clamping plate (64), and the slider (65) is slidably connected to the inner side of the slide seat (63). A guide rod (66) is fixed to the inner side of the slide seat (63), and the guide rod (66) and the slider (65) are movably interpenetrating.

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