Air cylinder airtightness detection device

Abstract

The utility model discloses a cylinder airtightness detection device. The air cylinder airtightness detection device comprises a workbench which is provided with a placing area used for positioning an air cylinder; the adjusting unit comprises a driving assembly and a connecting rod which are in driving connection, and the connecting rod is arranged in a sliding mode under the driving of the driving assembly; the air nozzle unit is provided with a vent hole, and the air nozzle unit is connected with the connecting rod so as to be movably arranged in the direction away from or close to the air hole of the air cylinder under the driving of the connecting rod, so that the vent hole is in butt joint with the air hole of the air cylinder in a sealed mode or is separated from the air hole of the air cylinder. According to the air cylinder airtightness detection device provided by the invention, the production efficiency is improved, the labor intensity is reduced, and the control precision is improved.

Description

Technical Field

[0001] This application relates to the field of pneumatic product testing technology, and in particular to a cylinder airtightness testing device. Background Technology

[0002] A cylinder is a pneumatic component that guides the piston rod in linear reciprocating motion within the cylinder body. Sealing is crucial for the stable operation of the cylinder. Therefore, the sealing performance of the cylinder needs to be tested before it leaves the factory.

[0003] In cylinder sealing testing, the cylinder's air inlet needs to be connected to the air supply mechanism, and the conventional connection method is a threaded connection. Threaded connections require manually tightening the air nozzle to the cylinder's air inlet, and manual disassembly is still required after testing. This manual method takes tens of seconds to tighten and disassemble a single product, which is not only inefficient and labor-intensive, but also requires improved control precision. Utility Model Content

[0004] The purpose of this application is to provide a cylinder airtightness testing device to improve production efficiency, reduce labor intensity, and increase control accuracy.

[0005] This application provides a cylinder airtightness testing device, comprising: a worktable with a placement area for positioning the cylinder; an adjustment unit including a drive assembly and a connecting rod connected by a drive assembly, the connecting rod being slidably disposed under the drive assembly; and a nozzle unit with a vent hole, the nozzle unit being connected to the connecting rod and being movable in a direction away from or towards the vent hole of the cylinder under the drive of the connecting rod, so that the vent hole is sealed and connected to or detached from the vent hole of the cylinder.

[0006] Optionally, the drive assembly includes a drive cylinder, which is drivenly connected to the connecting rod; a guide rail is mounted on the worktable, and the drive cylinder is slidably mounted on the guide rail to drive the air nozzle unit to move.

[0007] Optionally, the drive assembly further includes a sliding plate, which has a slot that can be slidably engaged with the guide rail, and the drive cylinder is mounted on the sliding plate.

[0008] Optionally, the drive assembly further includes a positioning cylinder mounted on the cylinder body of the drive cylinder; the positioning cylinder includes a piston rod that can extend to abut against the guide rail to position the drive cylinder.

[0009] Optionally, the adjustment unit further includes a first positioning plate and a second positioning plate, the air nozzle unit is mounted on the first positioning plate, and one end of the drive cylinder away from the sliding plate is mounted on the second positioning plate; there are two connecting rods, the cylinder body of the drive cylinder is located between the two connecting rods, both connecting rods pass through the sliding plate, and the two ends of any one connecting rod are respectively mounted on the first positioning plate and the second positioning plate.

[0010] Optionally, there are two drive components, both of which are slidably mounted on the guide rail; each drive component is connected to one of the air nozzle units via a connecting rod to adjust the position of the air nozzle unit.

[0011] Optionally, the cylinder airtightness detection device further includes a controller and a sensor connected in communication. The sensor is set on the workbench and sends a positioning signal to the controller after detecting the cylinder. After receiving the positioning signal, the controller controls the drive cylinder to drive the connecting rod to slide, so as to move the nozzle unit toward the air hole of the cylinder.

[0012] Optionally, the nozzle unit includes a mounting base and a nozzle; the mounting base is connected to the connecting rod, and the mounting base has a connected mounting hole and a connecting hole; the nozzle is sealed and installed in the mounting hole, the vent is opened in the nozzle, the vent is connected to the connecting hole, and the connecting hole is connected to an external air source.

[0013] Optionally, the nozzle unit further includes a fixing pin, and the mounting base has a positioning hole; the nozzle has a positioning notch, and one end of the fixing pin passes through the positioning hole and is embedded in the positioning notch.

[0014] Optionally, the air nozzle is detachably connected to the mounting hole, and the fixing pin is detachably connected to the positioning hole.

[0015] The above technical solution has the following beneficial effects:

[0016] The cylinder airtightness testing device provided in this application places the cylinder to be tested in the placement area. The drive assembly in the adjustment unit drives the connecting rod to slide, thereby moving the nozzle unit connected to the connecting rod towards the cylinder. When it moves to the cylinder's air hole, the nozzle unit seals against the air hole to perform a sealing test. After the cylinder airtightness test is completed, the nozzle unit moves in the opposite direction and disengages from the cylinder's air hole, facilitating cylinder replacement. The above-mentioned cylinder airtightness testing process is completed through automated control, which improves production efficiency, reduces labor intensity, and increases control accuracy compared to manual operation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the upper structure of the cylinder airtightness testing device in one embodiment of this application.

[0018] Figure 2 This is a schematic diagram of the lower structure of the cylinder airtightness testing device in one embodiment of this application.

[0019] Figure 3 This is a front view of a cylinder airtightness testing device according to an embodiment of this application.

[0020] Figure 4 This is a side view of a cylinder airtightness testing device in one embodiment of this application.

[0021] Figure 5 This is a schematic diagram of the structure of the air nozzle unit in one embodiment of this application.

[0022] Figure 6 This is a longitudinal sectional view of the nozzle unit in one embodiment of this application.

[0023] Figure 7 This is a schematic diagram of the air nozzle structure in one embodiment of this application.

[0024] Attached icon number

[0025] 1-Workbench, 10-Placement area, 11-Guide rail, 12-Reinforcing rib.

[0026] 2-Adjustment unit, 20-Drive assembly, 200-Drive cylinder, 201-Sliding plate, 202-Positioning cylinder, 203-Piston rod, 204-Connecting piece, 205-Drive end, 21-Connecting rod, 211-Sleeve, 22-First positioning plate, 23-Second positioning plate, 24-Sensor.

[0027] 3-Air nozzle unit, 30-Vent hole, 31-Mounting base, 310-Mounting hole, 311-Connection hole, 312-Positioning hole, 313-Snap-fit ​​interface, 32-Air nozzle, 320-Positioning notch, 33-Fixing pin, 330-Limiting plate, 34-Spring, 35-Baffle.

[0028] 4-Cylinder, 40-Air port. Detailed Implementation

[0029] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0030] It is readily understood that, based on the technical solution of this utility model, various structural and implementation methods can be interchanged by those skilled in the art without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0031] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly used in this specification are defined relative to the structures shown in the accompanying drawings. They are relative concepts and may therefore vary depending on their location and usage. Therefore, these or other directional terms should not be interpreted as restrictive.

[0032] This application provides a cylinder air tightness testing device, including: a worktable 1, an adjustment unit 2, and an air nozzle unit 3.

[0033] Please refer to Figures 1 to 4 The workbench 1 is provided with a placement area 10 for positioning the cylinder 4. The adjustment unit 2 includes a drive assembly 20 and a connecting rod 21 connected by a drive assembly 20. The connecting rod 21 is slidably disposed under the drive of the drive assembly 20. The nozzle unit 3 is provided with a vent hole 30. The nozzle unit 3 is connected to the connecting rod 21 and is movable in a direction away from or towards the vent hole 40 in the cylinder 4 under the sliding action of the connecting rod 21, so that the vent hole 30 is sealed and connected to the vent hole 40 in the cylinder 4 or detached from the vent hole 40 in the cylinder 4.

[0034] When the vent 30 of this embodiment is sealed and connected to the air port 40 of the cylinder, air can be vented through the vent 30 to the air port 40 to test the air tightness of the cylinder. The testing method can be to stop venting and close the valve on the vent pipe after a preset time, and then test whether the pressure of the part of the vent pipe connected to the cylinder 4 changes.

[0035] In this embodiment, the placement area 10 may have a concave positioning surface, and the arc-shaped side of the cylinder 4 may be fitted and positioned on the positioning surface. Optionally, the placement area 10 may be fitted with a positioning fixture for positioning the cylinder 4 by means of bolts, snap-fit, etc., with the positioning surface located on the positioning fixture. The positioning fixture may be replaced to accommodate cylinders of various sizes.

[0036] The cylinder airtightness testing device provided in this application places the cylinder 4, whose airtightness needs to be tested, in the placement area 10. The drive assembly 20 in the adjustment unit 2 drives the connecting rod 21 to slide, thereby moving the nozzle unit 3 connected to the connecting rod 21 toward the cylinder 4. When it moves to the air hole 40 of the cylinder 4, the vent 30 seals and engages with the air hole 40 to perform a sealing test on the cylinder 4. After the sealing test is completed, the nozzle unit 3 moves in the opposite direction and disengages from the air hole 40 of the cylinder 4, facilitating the replacement of the cylinder 4. The airtightness testing process of the cylinder 4 is completed through automated control, which improves production efficiency, reduces labor intensity, and increases control accuracy compared to manual operation.

[0037] In one optional embodiment of the drive assembly 20, the drive assembly 20 includes a drive cylinder 200, which is drivenly connected to the connecting rod 21. A guide rail 11 is mounted on the worktable 1, and the drive cylinder 200 is slidably mounted on the guide rail 11 to drive the nozzle unit 3 to move. When the drive cylinder 200 moves along the length of the guide rail 11, the nozzle unit 3 moves accordingly, thereby adjusting the position of the vent 30 so that the vent 30 is aligned with the air hole 40 of a specific model of cylinder 4. This facilitates the adaptability of the cylinder airtightness testing device to various models of cylinder 4.

[0038] Among them, such as Figure 2 As shown, the length direction of the guide rail 11 can be consistent with the length direction of the cylinder 4. The drive assembly 20 moves along the length direction of the cylinder 4 to adjust its position so that the vent 30 is aligned with the vent 40 of the cylinder 4.

[0039] In one alternative embodiment of the drive assembly 20, the drive assembly 20 further includes a sliding plate 201, the sliding plate 201 having a slot that slidably engages with the guide rail 11, and the drive cylinder 200 is mounted on the sliding plate 201. Figure 2 As shown in the embodiment of this application, the sliding plate 201 acts as an intermediate connector to allow the drive cylinder 200 to slide smoothly along the guide rail 11. The drive cylinder 200 can be bolted or snapped onto the sliding plate 201. The guide rail 11 has strip-shaped grooves on both sides. The two opposite sides of the groove opening are a first narrowed edge and a second narrowed edge, respectively, extending into the two strip-shaped grooves to stably snap the sliding plate 201 onto the guide rail 11.

[0040] Furthermore, such as Figure 2 As shown, a reinforcing rib 12 is also provided on the side of the worktable 1 facing the sliding plate 201 to increase the working strength of the worktable 1, keep the worktable 1 within a controllable thickness range, save materials, and the reinforcing rib 12 can be integrally formed with the worktable 1.

[0041] In an optional embodiment of the drive assembly 20, the drive assembly 20 further includes a positioning cylinder 202, which is mounted on the cylinder body of the drive cylinder 200. The positioning cylinder 202 includes a piston rod 203, which extends to abut against the guide rail 11 to position the drive cylinder 200. When the drive cylinder 200 slides to the desired position on the guide rail 11, the piston rod 203 of the positioning cylinder 202 extends to abut against the guide rail 11, thereby positioning the drive cylinder 200 through the friction between the piston rod 203 and the guide rail 11. Figure 2 As shown, in this embodiment of the application, the positioning cylinder 202 can be bolted to the cylinder body of the drive cylinder 200 via an "L"-shaped connecting piece 204, which is stable, reliable, and easy to disassemble and assemble.

[0042] In this embodiment, the drive cylinder 200 and the positioning cylinder 202 can be electric cylinders, hydraulic cylinders, or pneumatic cylinders, and can be selected according to actual working requirements.

[0043] In an optional embodiment of the adjustment unit 2, the adjustment unit 2 further includes a first positioning plate 22 and a second positioning plate 23. The air nozzle unit 3 is mounted on the first positioning plate 22, and one end of the drive cylinder 200 away from the sliding plate 201 is mounted on the second positioning plate 23. There are two connecting rods 21, and the cylinder body of the drive cylinder 200 is located between the two connecting rods 21. Both connecting rods 21 pass through the sliding plate 201, and both ends of any one connecting rod 21 are respectively mounted on the first positioning plate 22 and the second positioning plate 23. Figures 1 to 4 As shown, when the drive cylinder 200 is working, it drives the connecting rods 21 on both sides through the second positioning plate 23 to simultaneously drive the first positioning plate 22, thereby driving the air nozzle unit 3 to move and increasing the stability of the movement of the air nozzle unit 3. The sliding plate 201 is also provided with a bushing 211 extending along the length of the connecting rod 21. The bushing 211 effectively guides and limits the connecting rod 21 that passes through it.

[0044] Furthermore, in this embodiment of the application, the end of the drive cylinder 200 that is away from the sliding plate 201 is a retractable drive end 205.

[0045] Among them, the air nozzle unit 3 can be through, for example Figure 5 The card interface 313 shown snaps onto the first positioning plate 22 and can slide and adjust its position along the first positioning plate 22, such as... Figure 2 As shown. The card interface 313 is designed with a narrowed opening to ensure a stable connection to the first positioning plate 22.

[0046] In one optional embodiment of the drive assembly 20, there are two drive assemblies 20, both of which are slidably mounted on the guide rail 11; each drive assembly 20 is connected to one of the air nozzle units 3 via a connecting rod 21 to adjust the position of the air nozzle unit 3. Figures 2 to 3 As shown, the two air nozzle units 3 can block the two air holes 40 on the cylinder 4 (corresponding to the air inlet and air outlet respectively) to meet the airtightness test requirements of the cylinder 4. The two drive components 20 slide along the guide rail 11 and adjust their positions to align with the corresponding air holes 40, thereby improving the adaptability to cylinders 4 with various strokes.

[0047] In an optional automated control method, the cylinder airtightness detection device further includes a controller and a sensor 24 connected in communication. The sensor 24 is mounted on the workbench 1 and sends a positioning signal to the controller after detecting the cylinder 4. Upon receiving the positioning signal, the controller controls the drive cylinder 200 to drive the connecting rod 21 to slide, thereby moving the nozzle unit 3 toward the air hole 40 of the cylinder 4. In this embodiment, the sensor 24 can be an infrared sensor 24 or a camera, with its detection end facing the placement area 10 to detect whether the placement area 10 contains the cylinder 4. The controller can be a PC. Taking the drive cylinder 200 as the cylinder 4 as an example, during operation, the operator places the cylinder 4 in the placement area 10. The sensor 24 detects that the cylinder 4 is in position, and the controller controls the drive end 205 of the drive cylinder 200 to descend, so that the vent hole 30 of the nozzle 32 seals and engages with the air hole 40 of the cylinder 4. Vent 30 is vented and the air seal test procedure of cylinder 4 is performed. After the test is completed or after the preset test time (e.g., 30s, 60s), the controller controls the drive end 205 of the drive cylinder 200 to retract upwards, the drive cylinder 200 drives the second positioning plate 23 to move upwards, and the air nozzle 32 disengages from the air port 40 of cylinder 4.

[0048] In one optional embodiment of the nozzle unit 3, the nozzle unit 3 includes a mounting base 31 and a nozzle 32; the mounting base 31 is connected to the connecting rod 21, and the mounting base 31 has a communicating mounting hole 310 and a connecting hole 311. The nozzle 32 is sealed and installed in the mounting hole 310, and a vent hole 30 is formed in the nozzle 32, communicating with the connecting hole 311. The inlet of the connecting hole 311 is located on the outer surface of the mounting base 31 and is used to communicate with an external air source. Figure 6 As shown, in this embodiment, the air nozzle 32 can be made of an elastic structure such as rubber, and the mounting base 31 can be made of a metal material. When the air nozzle 32 moves to abut against the base, the air nozzle 32 can be made of an elastic structure such as rubber. Figure 1When the air hole 40 is shown, the rubber itself can be pressed onto the cylinder 4 to achieve a sealed connection between the air hole 30 and the air hole 40. The gas in the external air source enters the air hole 30 through the connection hole 311, and then enters the air hole 40 through the air hole 30 for air tightness testing.

[0049] In an optional embodiment of the nozzle unit 3, the nozzle unit 3 further includes a fixing pin 33, and the mounting base 31 has a positioning hole 312; the nozzle 32 has a positioning notch 320, and one end of the fixing pin 33 passes through the positioning hole 312 and is embedded in the positioning notch 320. Figure 6 and Figure 7 As shown, the air nozzle 32 can be positioned by embedding the fixing pin 33 in the positioning notch 320.

[0050] In one optional embodiment of the valve unit 3, the valve 32 is detachably connected to the mounting hole 310, and the fixing pin 33 is detachably connected to the positioning hole 312. In this embodiment, the valve 32 is detachable to facilitate the replacement of various specifications and models of valves 32, thereby improving compatibility with various cylinders 4.

[0051] In an alternative embodiment of the retaining pin 33, such as Figure 6 As shown, a limiting step is provided inside the positioning hole 312, and a limiting plate 330 is provided on the fixing pin 33. The limiting plate 330 fits against the limiting step. A baffle 35 is detachably installed at the outlet of the positioning hole 312. A compressed spring 34 is sleeved on the part of the fixing pin 33 located between the limiting plate 330 and the baffle 35. When the baffle 35 is installed at the outlet of the positioning hole 312 by means of bolt connection, snap-fit, etc., the end of the fixing pin 33 is stably embedded in the positioning notch 320 under the elastic force of the spring 34. After removing the baffle 35 from the positioning hole 312 and taking out the spring 34, the end of the fixing pin 33 can be removed from the positioning notch 320, realizing the detachability of the air nozzle 32 and the mounting hole 310.

[0052] As needed, the above technical solutions can be combined to achieve the best technical effect.

[0053] The above are merely the principles and preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several other modifications can be made based on the principles of this utility model, and these modifications should also be considered within the scope of protection of this utility model.

Claims

1. A cylinder airtightness testing device, characterized in that, include: A workbench, wherein the workbench is provided with a placement area for positioning cylinders; An adjustment unit, comprising a drive assembly and a connecting rod connected by a drive assembly, wherein the connecting rod is slidably positioned under the drive of the drive assembly; The nozzle unit has a vent hole and is connected to the connecting rod. It is movable in the direction away from or towards the vent hole of the cylinder under the action of the connecting rod, so that the vent hole is sealed and connected to the vent hole of the cylinder or disengaged from the vent hole of the cylinder.

2. The cylinder airtightness testing device according to claim 1, characterized in that, The drive assembly includes a drive cylinder, which is drivenly connected to the connecting rod. The workbench is equipped with a guide rail, and the drive cylinder is slidably mounted on the guide rail to drive the air nozzle unit to move.

3. The cylinder airtightness testing device according to claim 2, characterized in that, The drive assembly also includes a sliding plate, which has a slot that can be slidably engaged with the guide rail, and the drive cylinder is mounted on the sliding plate.

4. The cylinder airtightness testing device according to claim 3, characterized in that, The drive assembly further includes a positioning cylinder, which is mounted on the cylinder body of the drive cylinder; The positioning cylinder includes a piston rod that can extend to abut against the guide rail to position the drive cylinder.

5. The cylinder airtightness testing device according to claim 4, characterized in that, The adjustment unit further includes a first positioning plate and a second positioning plate, the air nozzle unit is mounted on the first positioning plate, and the end of the drive cylinder away from the sliding plate is mounted on the second positioning plate; The number of connecting rods is two, the cylinder body of the drive cylinder is located between the two connecting rods, both connecting rods pass through the sliding plate, and the two ends of any one connecting rod are respectively mounted on the first positioning plate and the second positioning plate.

6. The cylinder airtightness testing device according to claim 3, characterized in that, There are two drive components, and both drive components can be slidably mounted on the guide rail; Each of the aforementioned drive components is connected to one of the air nozzle units via a linkage to adjust the position of the air nozzle unit.

7. The cylinder airtightness testing device according to claim 4, characterized in that, The cylinder airtightness detection device also includes a controller and a sensor connected in communication. The sensor is set on the workbench and sends a positioning signal to the controller after detecting the cylinder. After receiving the positioning signal, the controller controls the drive cylinder to drive the connecting rod to slide, so as to move the nozzle unit toward the air hole of the cylinder.

8. The cylinder airtightness testing device according to any one of claims 1-7, characterized in that, The air nozzle unit includes a mounting base and an air nozzle; The mounting base is connected to the connecting rod, and the mounting base has a through mounting hole and a connecting hole; The air nozzle is sealed and installed in the mounting hole, the vent is opened in the air nozzle, the vent is connected to the connection hole, and the connection hole is connected to an external air source.

9. The cylinder airtightness testing device according to claim 8, characterized in that, The nozzle unit also includes a fixing pin, and the mounting base is provided with a positioning hole; The air nozzle has a positioning notch, and one end of the fixing pin passes through the positioning hole and is embedded in the positioning notch.

10. The cylinder airtightness testing device according to claim 9, characterized in that, The air nozzle is detachably connected to the mounting hole, and the fixing pin is detachably connected to the positioning hole.

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