Detection equipment for miniature pneumatic actuator

Abstract

A detection mechanism comprises a detection sliding table air cylinder, a detection installation frame, a detection extension assembly, an elastic reset assembly and at least one displacement detection sensor, the detection installation frame is arranged on a sliding table of the detection sliding table air cylinder, and the elastic reset assembly is arranged on the rear portion of the detection installation frame. The detection extension assembly is slidably installed on the detection installation frame in the longitudinal direction and located between the elastic reset assembly and the fixing clamp, and the elastic reset assembly elastically abuts against the rear end of the detection extension assembly. After the miniature pneumatic actuator is fixed through the fixing clamp, the detection sliding table air cylinder drives the detection installation frame to move forwards, the detection extension assembly is always kept to abut against a telescopic rod of the miniature pneumatic actuator under the action of the elastic reset assembly, and the position of the detection extension assembly or the miniature pneumatic actuator does not need to be manually adjusted. Gaps are avoided, errors are reduced, and the detection precision is improved.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic actuator testing technology, and in particular to a testing device for miniature pneumatic actuators. Background Technology

[0002] A pneumatic actuator is an actuating device that uses air pressure to drive the opening, closing, or regulation of valves. By evacuating or filling the pneumatic actuator with air, the extension and retraction of the telescopic rod is controlled. The airtightness of the pneumatic actuator determines its effectiveness. When the airtightness is poor or lost, the extension and retraction stroke accuracy of the telescopic rod will decrease, the extension and retraction speed will be slow, or it may even fail to extend or retract. Therefore, pneumatic actuators need to be tested by testing equipment before leaving the factory to ensure their effectiveness.

[0003] However, most traditional testing equipment directly detects the travel of the telescopic rod through sensors. While this method is accurate for larger actuators, it is ineffective for miniature or small pneumatic actuators. Because the telescopic rod's travel is limited, sensors cannot directly detect it. Therefore, an extension rod is often used to brace the telescopic rod, and sensors detect the travel by bracing the extension rod. This process is cumbersome, inefficient, and prone to errors due to the manual installation of the extension rod, which can create gaps between the extension rod and the telescopic rod, leading to reduced accuracy, reliability, and stability. Therefore, improvements are necessary. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a testing device for miniature pneumatic actuators, which reduces errors, improves testing accuracy, enhances reliability and stability, reduces loading and unloading steps, increases loading and unloading speed, and improves testing efficiency.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a testing device for a miniature pneumatic actuator, comprising a frame and at least one testing device mounted on the frame. The testing device includes a base plate, a fixing fixture, a testing mechanism, a pneumatic mechanism, and a control circuit. The fixing fixture, testing mechanism, and pneumatic mechanism are respectively fixedly mounted on the base plate. The fixing fixture is located on the front side of the testing mechanism. The pneumatic mechanism is connected to the miniature pneumatic actuator. The testing mechanism includes a testing slide cylinder, a testing mounting frame, a testing extension assembly, an elastic reset assembly, and at least one displacement detection sensor. The slide cylinder is fixedly mounted on the base plate. The testing mounting frame is located on the slide of the testing slide cylinder. The elastic reset assembly is located at the rear of the testing mounting frame. The testing extension assembly is slidably mounted on the testing mounting frame in the longitudinal direction and is located between the elastic reset assembly and the fixing fixture. The elastic reset assembly elastically abuts against the rear end of the testing extension assembly. The displacement detection sensor is fixedly mounted on the testing mounting frame and is located beside the testing extension assembly. The displacement detection sensor and the pneumatic mechanism are electrically connected to the control circuit.

[0006] In a further technical solution, the elastic reset assembly includes a push rod, an adjusting nut, and a reset spring. The push rod is slidably mounted on the rear of the detection mounting frame. A limiting part is provided at the front end of the push rod, and the limiting part abuts against the detection extension assembly. The reset spring is sleeved on the push rod, with the front end of the reset spring abutting against the limiting part and the rear end of the reset spring abutting against the detection mounting frame. An external thread is provided on the outer side of the push rod, and the adjusting nut is threadedly connected to the rear of the adjusting nut. The adjusting nut is in a limiting fit with the detection mounting frame.

[0007] In a further technical solution, the detection extension assembly includes a detection connecting block, a detection extension rod, and at least one detection block. The detection connecting block is slidably installed on the detection mounting frame in the longitudinal direction, and the detection extension rod is fixedly installed on the detection connecting block. The front end of the detection extension rod is provided with a detection abutment top for abutting the telescopic rod of the micro pneumatic actuator. The limiting part of the abutment rod abuts and cooperates with the rear end of the detection extension rod. The detection block is located on one side of the detection extension rod and cooperates with the displacement detection sensor.

[0008] In a further technical solution, the testing mounting frame includes a testing mounting plate, a reset mounting plate, and a limiting plate. The testing mounting plate is fixedly mounted on the slide of the testing slide cylinder. The limiting plate is fixedly mounted on the front part of the front end face of the testing mounting plate and is in a limiting fit with the testing connecting block. The reset mounting plate is fixedly mounted on the rear part of the upper end face of the testing mounting plate. The reset mounting plate has a reset sliding hole along the longitudinal direction. The push rod is slidably mounted in the reset sliding hole. The adjusting nut is located on the rear side of the reset mounting plate and is in a limiting fit with the reset mounting plate. The rear end of the reset spring abuts against the front side of the reset mounting plate. The testing connecting block is slidably mounted on the testing mounting plate.

[0009] In a further technical solution, a slide rail is fixedly installed on the detection mounting plate, the slide rail is set along the longitudinal direction, and a slider is fixedly installed on the detection connecting block, the slider being slidably installed on the slide rail.

[0010] In a further technical solution, the detection mechanism is equipped with two displacement detection sensors, which are respectively located on the left and right sides of the detection extension component. The detection extension component is equipped with two detection blocks, which are respectively located on the left and right sides of the detection extension rod. The two detection blocks are staggered along the longitudinal direction, and the two displacement detection sensors are respectively engaged with the two detection blocks.

[0011] In a further technical solution, multiple detection devices are spaced apart on the frame. The fixing fixture includes a positioning seat, a vertical clamping mechanism, and a horizontal clamping mechanism. The positioning seat is fixedly installed on the base plate and located in front of the detection mechanism. A positioning groove is opened on the upper part of the positioning seat. The vertical clamping mechanism includes a vertical pressure block and a vertical drive assembly. The vertical drive assembly is fixedly installed on the base plate or the positioning seat. The vertical drive assembly is drivenly connected to the vertical pressure block. The vertical pressure block is located above the positioning seat and moves towards and away from the positioning seat. The horizontal clamping mechanism includes a horizontal drive assembly and a horizontal clamping block. The horizontal drive assembly is fixedly installed on the base plate or the positioning seat. The horizontal clamping block is slidably installed on the positioning seat in the longitudinal direction. The horizontal drive assembly is drivenly connected to the horizontal clamping block.

[0012] In a further technical solution, the vertical drive assembly includes a corner pressing cylinder, which is fixedly installed on the base plate and located on one side of the positioning seat. The vertical pressing block is fixedly installed on the pressing block of the corner pressing cylinder, and a fixing groove is provided at the lower part of the vertical pressing block.

[0013] The horizontal drive assembly includes a horizontal drive cylinder, which is fixedly installed on one side of the positioning seat. The horizontal clamping block includes a connecting part and a clamping part. The connecting part is formed on one side of the clamping part, and the clamping part is located on the rear side of the positioning groove. A baffle is fixedly installed on the front side of the connecting seat and is located on the front side of the positioning groove. The baffle has a connecting hole that penetrates the baffle in the longitudinal direction. The pneumatic mechanism passes through the connecting hole and connects to the micro pneumatic actuator. The connecting part is fixedly installed on the piston rod of the horizontal drive cylinder. The clamping part has a detection through hole that penetrates the clamping part in the longitudinal direction. The front end of the detection extension assembly passes through the detection through hole and abuts against the telescopic rod of the micro pneumatic actuator.

[0014] In a further technical solution, the pneumatic mechanism includes a pneumatic connector, an air pump, an air pipe, and a pressure controller. The air pump is fixedly installed on the frame, the pneumatic connector is connected to the air pipe, the air pipe is connected to the air pump, the pressure controller is set on the air pipe and fixedly installed on the frame, and the pressure controller and the air pump are electrically connected to the control circuit respectively.

[0015] In a further technical solution, the detection device is also equipped with a barcode scanner, which is electrically connected to the control circuit.

[0016] The advantages of this invention compared to existing technologies are as follows: After fixing the miniature pneumatic actuator with a clamp, the detection slide cylinder drives the detection mounting frame forward. Under the action of the elastic reset component, the detection extension component remains pressed against the telescopic rod of the miniature pneumatic actuator, eliminating the need for manual adjustment of the position of the detection extension component or the miniature pneumatic actuator, avoiding gaps, reducing errors, and improving detection accuracy. After fixing the miniature pneumatic actuator, the detection slide cylinder drives the detection mounting frame, causing the detection extension component to press against the telescopic rod and squeeze the elastic reset component to complete the longitudinal positioning. This eliminates the need for precise longitudinal positioning of the miniature pneumatic actuator, improving loading and unloading efficiency and detection efficiency. Furthermore, even after the telescopic rod retracts, the detection extension component remains pressed against the telescopic rod for multiple continuous tests. This not only allows for fatigue resistance testing but also improves detection accuracy through multiple tests. The simultaneous detection by two displacement sensors further enhances detection accuracy. The simultaneous detection of multiple miniature pneumatic actuators by multiple detection devices on the frame further improves detection efficiency. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the detection device of this utility model;

[0020] Figure 3 This is a top view of the detection device of this utility model;

[0021] Figure 4 This is an exploded view of the testing mechanism of this utility model;

[0022] Figure 5 This is an exploded view of the fixing clamp of this utility model.

[0023] In the picture:

[0024] 1 rack;

[0025] 2. Detection device;

[0026] 3. Base plate;

[0027] 4. Fixing fixture, 41. Positioning seat, 411. Positioning groove, 42. Vertical pressure block, 421. Fixing groove, 43. Corner pressing cylinder, 44. Horizontal clamping block, 441. Connecting part, 442. Clamping part, 443. Detection hole, 45. Horizontal drive cylinder, 46. Baffle, 461. Connecting hole.

[0028] 5. Detection mechanism; 51. Detection slide cylinder; 521. Detection mounting plate; 522. Reset mounting plate; 523. Reset sliding hole; 524. Limiting plate; 525. Slide rail; 526. Slider; 531. Detection connecting block; 532. Detection extension rod; 533. Detection abutment; 534. Detection block; 54. Elastic reset assembly; 541. Top rod; 542. Limiting part; 543. Adjusting nut; 544. Reset spring; 55. Displacement detection sensor.

[0029] 6. Pneumatic mechanism; 61. Pneumatic connector; 62. Air pipe; 63. Pressure controller;

[0030] 7. Miniature pneumatic actuator. Detailed Implementation

[0031] The following are merely preferred embodiments of the present invention and do not limit the scope of protection of the present invention.

[0032] A testing device for miniature pneumatic actuators, such as Figures 1 to 5 As shown, the device includes a frame 1 and at least one detection device 2 mounted on the frame 1. The detection device 2 includes a base plate 3, a fixing fixture 4, a detection mechanism 5, a pneumatic mechanism 6, and a control circuit. The fixing fixture 4, the detection mechanism 5, and the pneumatic mechanism 6 are fixedly mounted on the base plate 3. The fixing fixture 4 is located on the front side of the detection mechanism 5. The pneumatic mechanism 6 is connected to a micro pneumatic actuator 7. The detection mechanism 5 includes a detection slide cylinder 51, a detection mounting frame, a detection extension assembly, an elastic reset assembly 54, and at least one displacement detection sensor 55. The slide cylinder is fixedly mounted on the base plate 3. The detection mounting frame is located on the slide of the detection slide cylinder 51. The elastic reset assembly 54 is located at the rear of the detection mounting frame. The detection extension assembly is slidably mounted on the detection mounting frame in the longitudinal direction and is located between the elastic reset assembly 54 and the fixing fixture 4. The elastic reset assembly 54 elastically abuts against the rear end of the detection extension assembly. The displacement detection sensor 55 is fixedly mounted on the detection mounting frame and is located beside the detection extension assembly. The displacement detection sensor 55 and the pneumatic mechanism 6 are electrically connected to the control circuit.

[0033] When testing the miniature pneumatic actuator 7, the extension assembly needs to be used to press against the telescopic rod of the miniature pneumatic actuator 7 so that the displacement detection sensor 55 can perform the detection. However, the extension assembly of traditional testing equipment is fixed. When fixing the miniature pneumatic actuator 7, precise positioning in the horizontal and vertical directions is required to ensure that the telescopic rod of the miniature pneumatic actuator 7 presses against the extension assembly. This inevitably creates a small gap between the telescopic rod and the extension assembly, leading to errors and reducing the detection accuracy. In this invention, after fixing the miniature pneumatic actuator 7 with the fixing clamp 4, the cylinder 51 of the testing slide drives the testing mounting frame to move forward. Under the action of the elastic reset assembly 54, the extension assembly is always kept in place. The device is held against the telescopic rod of the miniature pneumatic actuator 7, eliminating the need for manual adjustment of the position of the detection extension component or the miniature pneumatic actuator 7. This avoids gaps, reduces errors, and improves detection accuracy. Even after the telescopic rod is retracted, the detection extension component remains against the telescopic rod for multiple consecutive tests. This not only allows for fatigue resistance testing but also improves detection accuracy through repeated testing. After the miniature pneumatic actuator 7 is fixed, the detection mounting bracket is driven by the detection slide cylinder 51, causing the detection extension component to press against the telescopic rod and squeeze the elastic reset component 54 to complete the longitudinal positioning. This eliminates the need for precise longitudinal positioning of the miniature pneumatic actuator 7, improving loading and unloading efficiency and increasing detection efficiency.

[0034] Specifically, such as Figure 4 As shown, the elastic reset assembly 54 includes a push rod 541, an adjusting nut 543, and a reset spring 544. The push rod 541 is slidably mounted on the rear of the detection mounting frame. A limiting part 542 is provided at the front end of the push rod 541, abutting against the detection extension assembly. The reset spring 544 is sleeved on the push rod 541, with its front end abutting against the limiting part 542 and its rear end abutting against the detection mounting frame. The outer surface of the push rod 541 is provided with external threads. The adjusting nut 543 is threadedly connected to the rear of the adjusting nut 543, and the adjusting nut 543 engages with the detection mounting frame in a limiting fit. The displacement stroke of the push rod 541 is controlled by rotating the adjusting nut 543, thereby adapting to telescopic rods of different lengths or strokes to improve applicability and prevent the reset spring 544 from applying excessive pressure to the telescopic rod, avoiding excessive pressure that could affect its extension.

[0035] Specifically, the detection extension assembly includes a detection connecting block 531, a detection extension rod 532, and at least one detection block 534. The detection connecting block 531 is slidably mounted on the detection mounting frame in the longitudinal direction. The detection extension rod 532 is fixedly mounted on the detection connecting block 531. The front end of the detection extension rod 532 is provided with a detection abutment top 533 for abutting against the telescopic rod of the miniature pneumatic actuator 7. The limiting part 542 of the top rod 541 abuts against the rear end of the detection extension rod 532. The detection block 534 is disposed on one side of the detection extension rod 532 and engages with the displacement detection sensor 55. By increasing the connection area through the detection connecting block 531, the stability of the detection extension rod 532 during movement is improved, preventing wobbling. The displacement detection sensor 55 detects the detection block 534, increasing the detection area and further improving the detection accuracy.

[0036] Specifically, the testing mounting frame includes a testing mounting plate 521, a reset mounting plate 522, and a limiting plate 524. The testing mounting plate 521 is fixedly mounted on the slide of the testing slide cylinder 51. The limiting plate 524 is fixedly mounted on the front part of the front end face of the testing mounting plate 521 and is in a limiting fit with the testing connecting block 531. The reset mounting plate 522 is fixedly mounted on the rear part of the upper end face of the testing mounting plate 521. The reset mounting plate 522 has a reset sliding hole 523 in the longitudinal direction. The push rod 541 is slidably mounted in the reset sliding hole 523. The adjusting nut 543 is located on the rear side of the reset mounting plate 522 and is in a limiting fit with the reset mounting plate 522. The rear end of the reset spring 544 abuts against the front side of the reset mounting plate 522. The testing connecting block 531 is slidably mounted on the testing mounting plate 521. The detection mounting bracket has a simple structure and low cost. When the elastic reset component 54 pushes the detection extension component forward, the limiting plate 524 abuts against the detection connecting block 531 to limit the detection extension component, preventing the detection extension component from moving forward excessively and pressing against the telescopic rod, and preventing the detection extension component from moving forward and detaching from the detection mounting bracket when the micro pneumatic actuator 7 is not installed.

[0037] Specifically, the detection mounting plate 521 is fixedly mounted with a slide rail 525, which is arranged in the longitudinal direction. The detection connecting block 531 is fixedly mounted with a slider 526, which is slidably mounted on the slide rail 525. The detection mounting bracket and the detection extension assembly are connected by the slide rail 525 and the slider 526 to reduce sliding resistance and make the movement of the detection extension assembly smoother.

[0038] Specifically, the detection mechanism 5 is equipped with two displacement detection sensors 55, which are respectively located on the left and right sides of the detection extension assembly. The detection extension assembly is equipped with two detection blocks 534, which are respectively located on the left and right sides of the detection extension rod 532. The two detection blocks 534 are staggered along the longitudinal direction, and the two displacement detection sensors 55 are respectively engaged with the two detection blocks 534. When the displacement detection sensors 55 are infrared distance sensors, the relative displacement distance of the telescopic rod can be accurately detected. By setting two displacement detection sensors 55 to detect simultaneously, the detection accuracy is further improved. The displacement detection sensors 55 can also be proximity sensors. When the first proximity sensor detects the first detection block 534, it indicates that the detection preparation is complete and the initial position has been reached. When the second proximity sensor detects the second detection block 534, it indicates that the movement stroke of the telescopic rod is qualified. The movement speed of the telescopic rod is determined by timing. The structure is simple and the cost is low.

[0039] Specifically, multiple detection devices 2 are spaced apart on the frame 1, such as... Figure 5 As shown, the fixing fixture 4 includes a positioning seat 41, a vertical clamping mechanism, and a horizontal clamping mechanism. The positioning seat 41 is fixedly installed on the base plate 3 and located in front of the detection mechanism 5. A positioning groove 411 is provided on the upper part of the positioning seat 41. The vertical clamping mechanism includes a vertical pressure block 42 and a vertical drive assembly. The vertical drive assembly is fixedly installed on the base plate 3 or the positioning seat 41. The vertical drive assembly is connected to the vertical pressure block 42 in a transmission manner. The vertical pressure block 42 is located above the positioning seat 41. The vertical pressure block 42 moves towards and away from the positioning seat 41. The horizontal clamping mechanism includes a horizontal drive assembly and a horizontal clamping block 44. The horizontal drive assembly is fixedly installed on the base plate 3 or the positioning seat 41. The horizontal clamping block 44 is slidably installed on the positioning seat 41 in the longitudinal direction. The horizontal drive assembly is connected to the horizontal clamping block 44 in a transmission manner. By setting multiple detection devices 2 on the frame 1 to simultaneously detect multiple miniature pneumatic actuators 7, the detection efficiency is further improved. The vertical drive component drives the vertical pressure block 42 to move in the vertical direction, thereby cooperating with the positioning seat 41 to clamp and fix the miniature pneumatic actuator 7 between the vertical pressure block 42 and the positioning seat 41. Then, the horizontal drive component drives the horizontal clamping block 44 to move in the longitudinal direction, thereby cooperating with the positioning seat 41 to clamp and fix the miniature pneumatic actuator 7 between the positioning seat 41 and the horizontal clamping block 44, so as to achieve positioning and fixing of the miniature pneumatic actuator 7 in three-dimensional space.

[0040] Specifically, the vertical drive assembly includes a corner-pressing cylinder 43, which is fixedly installed on the base plate 3 and located on one side of the positioning seat 41. A vertical pressing block 42 is fixedly installed on the pressing block of the corner-pressing cylinder 43, and a fixing groove 421 is provided at the lower part of the vertical pressing block 42. The horizontal drive assembly includes a horizontal drive cylinder 45, which is fixedly installed on one side of the positioning seat 41. A horizontal clamping block 44 includes a connecting part 441 and a clamping part 442. The connecting part 441 is formed on one side of the clamping part 442, and the clamping part 442 is disposed on the positioning seat 41. A baffle 46 is fixedly installed on the rear side of the positioning slot 411 and the front side of the connecting seat. The baffle 46 is located on the front side of the positioning slot 411. A connecting hole 461 is opened in the longitudinal direction of the baffle 46. The pneumatic mechanism 6 passes through the connecting hole 461 and connects to the micro pneumatic actuator 7. The connecting part 441 is fixedly installed on the piston rod of the horizontal drive cylinder 45. A detection through hole 443 is opened in the longitudinal direction of the clamping part 442. The front end of the detection extension component passes through the detection through hole 443 and abuts against the telescopic rod of the micro pneumatic actuator 7. The corner-down cylinder 43 can drive the vertical pressure block 42 to rotate in the vertical direction. During unloading, the corner-down cylinder 43 first drives the vertical pressure block 42 to move upward, and then drives the vertical pressure block 42 to rotate, so that the vertical pressure block 42 is away from the top of the positioning seat 41, giving space to remove the miniature pneumatic actuator 7, thus facilitating loading and unloading. The corner-down cylinder 43 has a simple structure and low cost. During loading and unloading, the horizontal drive cylinder 45 drives the horizontal clamping block 44 to move, thereby cooperating with the baffle 46 to position the miniature pneumatic actuator 7 in the longitudinal direction. The structure is simple and the cost is low. During loading, the micro pneumatic actuator 7 is first connected to the pneumatic mechanism 6, and then the pneumatic mechanism 6 is placed in the positioning slot 411. The horizontal drive cylinder 45 drives the horizontal clamping block 44 to move backward and clamp the micro pneumatic actuator 7 in the longitudinal direction. The corner pressing cylinder 43 then drives the vertical pressing block 42 to rotate above the micro pneumatic actuator 7 and press down on the micro pneumatic actuator 7 to complete the positioning and fixing.

[0041] Specifically, the pneumatic mechanism 6 includes a pneumatic connector 61, an air pump (not shown in the diagram), an air pipe 62, and a pressure controller 63. The air pump is fixedly mounted on the frame 1. The pneumatic connector 61 is connected to the air pipe 62, and the air pipe 62 is connected to the air pump. The pressure controller 63 is mounted on the air pipe 62 and fixedly mounted on the frame 1. The pressure controller 63 and the air pump are electrically connected to the control circuit. The air pipe 62 is connected to the miniature pneumatic actuator 7 via the pneumatic connector 61. The pneumatic connector 61 and the miniature pneumatic actuator 7 are connected by a threaded connection, which is simple and reliable. The pressure controller 63 controls the inflation and deflation of the miniature pneumatic actuator 7, thereby driving the miniature pneumatic actuator 7 and detecting the pressure to facilitate the detection of the airtightness of the miniature pneumatic actuator 7 and improve the detection capabilities.

[0042] Specifically, the testing device 2 is also equipped with a barcode scanner, which is electrically connected to the control circuit. Before testing, the barcode scanner scans the QR code or barcode information on the miniature pneumatic actuator 7 to obtain the actuator's identification ID and model information. Then, the miniature pneumatic actuator 7 is tested, and the test results are bound to the actuator's identification ID to generate a complete electronic report. Furthermore, by obtaining the actuator's model information before testing, the device can automatically determine whether the actuator is qualified based on the qualified parameters for that model, eliminating the need for manual entry of model and identification ID information and making it more convenient to use.

[0043] It is important to understand that the terms "front," "back," "left," and "right," etc., indicate directions or positional relationships based on... Figure 3 The orientations or positional relationships shown, with "longitudinal" along the front-back direction and "lateral" along the left-right direction, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model.

[0044] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A testing device for a miniature pneumatic actuator, comprising a frame (1) and at least one testing device (2) mounted on the frame (1), the testing device (2) comprising a base plate (3), a fixing clamp (4), a testing mechanism (5), a pneumatic mechanism (6), and a control circuit, wherein the fixing clamp (4), the testing mechanism (5), and the pneumatic mechanism (6) are respectively fixedly mounted on the base plate (3), the fixing clamp (4) is located on the front side of the testing mechanism (5), and the pneumatic mechanism (6) is connected to the miniature pneumatic actuator (7), characterized in that: The detection mechanism (5) includes a detection slide cylinder (51), a detection mounting frame, a detection extension assembly, an elastic reset assembly (54), and at least one displacement detection sensor (55). The slide cylinder is fixedly mounted on the base plate (3). The detection mounting frame is set on the slide of the detection slide cylinder (51). The elastic reset assembly (54) is set at the rear of the detection mounting frame. The detection extension assembly is slidably mounted on the detection mounting frame in the longitudinal direction and is located between the elastic reset assembly (54) and the fixed clamp (4). The elastic reset assembly (54) elastically abuts against the rear end of the detection extension assembly. The displacement detection sensor (55) is fixedly mounted on the detection mounting frame and is located beside the detection extension assembly. The displacement detection sensor (55) and the pneumatic mechanism (6) are electrically connected to the control circuit, respectively.

2. The testing device for a miniature pneumatic actuator according to claim 1, characterized in that: The elastic reset assembly (54) includes a push rod (541), an adjusting nut (543), and a reset spring (544). The push rod (541) is slidably mounted on the rear of the detection mounting frame. The front end of the push rod (541) is provided with a limiting part (542), which abuts against the detection extension assembly. The reset spring (544) is sleeved on the push rod (541). The front end of the reset spring (544) abuts against the limiting part (542), and the rear end of the reset spring (544) abuts against the detection mounting frame. The outer side of the push rod (541) is provided with an external thread. The adjusting nut (543) is threadedly connected to the rear of the adjusting nut (543), and the adjusting nut (543) is in a limiting fit with the detection mounting frame.

3. The testing device for a miniature pneumatic actuator according to claim 2, characterized in that: The detection extension assembly includes a detection connecting block (531), a detection extension rod (532), and at least one detection block (534). The detection connecting block (531) is slidably mounted on the detection mounting frame in the longitudinal direction. The detection extension rod (532) is fixedly mounted on the detection connecting block (531). The front end of the detection extension rod (532) is provided with a detection abutment top (533) for abutting against the telescopic rod of the micro pneumatic actuator (7). The limiting part (542) of the top rod (541) abuts against the rear end of the detection extension rod (532). The detection block (534) is located on one side of the detection extension rod (532) and is in sensing cooperation with the displacement detection sensor (55).

4. The testing device for a miniature pneumatic actuator according to claim 3, characterized in that: The detection mounting bracket includes a detection mounting plate (521), a reset mounting plate (522), and a limiting plate (524). The detection mounting plate (521) is fixedly mounted on the slide of the detection slide cylinder (51). The limiting plate (524) is fixedly mounted on the front part of the front end face of the detection mounting plate (521), and the limiting plate (524) is in a limiting fit with the detection connecting block (531). The reset mounting plate (522) is fixedly mounted on the upper end face of the detection mounting plate (521). At the rear, the reset mounting plate (522) has a reset sliding hole (523) in the longitudinal direction. The push rod (541) is slidably installed in the reset sliding hole (523). The adjusting nut (543) is located on the rear side of the reset mounting plate (522) and is in a limiting fit with the reset mounting plate (522). The rear end of the reset spring (544) abuts against the front side of the reset mounting plate (522). The detection connecting block (531) is slidably installed on the detection mounting plate (521).

5. The testing device for a miniature pneumatic actuator according to claim 4, characterized in that: The detection mounting plate (521) is fixedly mounted with a slide rail (525), which is arranged in the longitudinal direction. The detection connecting block (531) is fixedly mounted with a slider (526), ​​which is slidably mounted on the slide rail (525).

6. The testing device for a miniature pneumatic actuator according to claim 3, characterized in that: The detection mechanism (5) is provided with two displacement detection sensors (55), which are respectively located on the left and right sides of the detection extension assembly. The detection extension assembly is provided with two detection blocks (534), which are respectively located on the left and right sides of the detection extension rod (532). The two detection blocks (534) are staggered along the longitudinal direction, and the two displacement detection sensors (55) are respectively in sensing cooperation with the two detection blocks (534).

7. A testing device for a miniature pneumatic actuator according to any one of claims 1 to 6, characterized in that: The frame (1) is provided with a plurality of detection devices (2) at intervals. The fixed fixture (4) includes a positioning seat (41), a vertical clamping mechanism and a horizontal clamping mechanism. The positioning seat (41) is fixedly installed on the base plate (3) and located in front of the detection mechanism (5). The upper part of the positioning seat (41) is provided with a positioning groove (411). The vertical clamping mechanism includes a vertical pressure block (42) and a vertical drive assembly. The vertical drive assembly is fixedly installed on the base plate (3) or the positioning seat (41). The vertical drive assembly is connected to the vertical pressure block (42) in a transmission manner. The vertical pressure block (42) is located above the positioning seat (41). The vertical pressure block (42) moves toward and away from the positioning seat (41). The horizontal clamping mechanism includes a horizontal drive assembly and a horizontal clamping block (44). The horizontal drive assembly is fixedly installed on the base plate (3) or the positioning seat (41). The horizontal clamping block (44) is slidably installed on the positioning seat (41) in the longitudinal direction. The horizontal drive assembly is connected to the horizontal clamping block (44) in a transmission manner.

8. The testing device for a miniature pneumatic actuator according to claim 7, characterized in that: The vertical drive assembly includes a corner pressing cylinder (43), which is fixedly installed on the base plate (3) and located on one side of the positioning seat (41). The vertical pressing block (42) is fixedly installed on the pressing block of the corner pressing cylinder (43), and a fixing groove (421) is provided at the lower part of the vertical pressing block (42). The horizontal drive assembly includes a horizontal drive cylinder (45), which is fixedly installed on one side of the positioning seat (41). The horizontal clamping block (44) includes a connecting part (441) and a clamping part (442). The connecting part (441) is formed on one side of the clamping part (442), and the clamping part (442) is located on the rear side of the positioning groove (411). A baffle (46) is fixedly installed on the front side of the connecting seat and is located on the front side of the positioning groove (411). A connecting hole (461) is provided in the longitudinal direction through the baffle (46). The pneumatic mechanism (6) passes through the connecting hole (461) and is connected to the miniature pneumatic actuator (7). The connecting part (441) is fixedly installed on the piston rod of the horizontal drive cylinder (45). The clamping part (442) is provided in the longitudinal direction through the detection through hole (443). The front end of the detection extension component passes through the detection through hole (443) and abuts against the telescopic rod of the miniature pneumatic actuator (7).

9. The testing device for a miniature pneumatic actuator according to claim 7, characterized in that: The pneumatic mechanism (6) includes a pneumatic connector (61), an air pump, an air pipe (62), and a pressure controller (63). The air pump is fixedly installed on the frame (1). The pneumatic connector (61) is connected to the air pipe (62), and the air pipe (62) is connected to the air pump. The pressure controller (63) is set on the air pipe (62) and fixedly installed on the frame (1). The pressure controller (63) and the air pump are electrically connected to the control circuit respectively.

10. A testing device for a miniature pneumatic actuator according to claim 7, characterized in that: The detection device (2) is also equipped with a barcode scanner, which is electrically connected to the control circuit.

Images