An adaptive sealing type double-station double-channel air tightness detection device

Abstract

The utility model discloses a kind of self-adapting sealing type double-station double-channel air tightness detection device, including rack and workbench being set on rack, first detection station and second detection station are arranged side by side on workbench.Each detection station includes V-shaped positioning support block for supporting positioning motor, sealing compression mechanism for axial compression, self-adapting sealing head and lead-out line channel pipe and lead-out line sealing assembly.Gas path detection system is communicated with the self-adapting sealing head and lead-out line sealing assembly of each detection station respectively, realizes the synchronous inflation detection to motor tail and lead-out line end.Through double-station structure and self-adapting sealing design, improve detection efficiency and detection reliability, applicable to motor air tightness detection occasion.

Description

Technical Field

[0001] This utility model relates to a testing device, specifically an adaptive sealing dual-station dual-channel airtightness testing device. Background Technology

[0002] With the widespread application of motor products in home appliances, industrial equipment and automobiles, motors usually need to undergo air tightness testing after production to determine whether there are any air leakage defects in the motor housing, the air inlet at the tail of the motor and the lead wires, so as to ensure the waterproofness and reliability of the motor during use.

[0003] Most existing airtightness testing devices adopt a single-station testing method, that is, the positioning, sealing, inflation and testing of the workpiece are completed sequentially at a single station. This type of device has the following shortcomings in actual use: Existing devices mostly rely on manual placement of the motor in a fixture, followed by sealing the air inlet at the motor's tail end with a rigid sealing head or a fixed-size sealing gasket. When there are machining deviations in the dimensions of the air inlet at the motor's tail end or when the installation position is off-center, it can easily lead to poor sealing and misjudgment. At the same time, the rigid clamping method may also cause crush damage to the motor housing, air inlet, or lead wires, affecting the product's appearance quality.

[0004] Existing testing devices typically only test the air intake at the tail of the motor for inflation, while the sealing method for the lead wire ends is relatively simple, often using temporary clamping or manual sealing. This makes it difficult to ensure the consistency of the sealing at the lead wire end during the testing process, resulting in poor repeatability of the test results.

[0005] Existing airtightness testing equipment is mostly a single-station structure, which cannot test multiple workpieces simultaneously. In addition, the testing process requires sequential inflation, balancing and testing operations, resulting in a long overall testing cycle, which is difficult to meet the testing efficiency requirements of mass production lines.

[0006] Some existing devices have limited control precision over inflation time, pressure holding time, and detection time during the detection process. When the gas source pressure fluctuates, it can easily cause unstable detection pressure, which in turn affects the accuracy of leakage judgment. Utility Model Content

[0007] To address the aforementioned problems, this invention provides an adaptive sealing dual-station dual-channel airtightness testing device. This airtightness testing device features a reasonable structure, reliable positioning, strong sealing adaptability, and improved testing efficiency, thereby resolving the problems existing in the prior art.

[0008] This utility model is achieved through the following technical solution: an adaptive sealing dual-station dual-channel airtightness testing device, comprising: A frame, on which a worktable is provided; The first and second inspection stations are arranged side by side on the workbench; Each testing station includes: V-shaped positioning support blocks are set on the worktable to support and position the motor to be tested; A sealing and pressing mechanism is provided on one side of the V-shaped positioning support, including a cylinder arranged along the motor axis and a pressure head connected to the cylinder output end; An adaptive sealing head is installed on the side of the motor to be tested away from the sealing and pressing mechanism. It is positioned opposite to the air inlet at the tail of the motor and is used to form a sealed connection with the tail of the motor under the push of the cylinder. The lead wire channel tube is located on the side of the V-shaped positioning support and is used to accommodate the motor lead wire; The lead wire sealing assembly is mounted on a sealing adjustment base plate and includes a quick support clamp and a connecting nut fixing block. The quick support clamp is used to position and clamp one end of the lead wire channel tube, and the connecting nut is sealed and installed at the other end of the lead wire channel tube. The motor lead wire is sealed and installed on one side of the lead wire channel tube through the connecting nut. The air circuit detection system includes a pressure regulating valve, a solenoid valve control valve group, a digital pressure sensor, and an air tightness tester. The air circuit detection system is connected to the adaptive sealing head and lead wire sealing assembly of the first detection station and the second detection station respectively through pipelines, and is used to simultaneously perform air inflation detection on the tail end of the motor and the lead wire end. The control and detection module is electrically connected to the airtightness tester and the digital pressure sensor, and is used to collect pressure changes and determine the detection results.

[0009] As a preferred technical solution, a nut fixing block is also provided on the side of the sealing adjustment base plate away from the quick support clamp, and the connecting nut is supported and installed on the nut fixing block.

[0010] As a preferred technical solution, a square locking block is installed on the lead-out channel tube, a slider is provided at the bottom of the square locking block, a sliding rod is provided on the sealing adjustment base plate, and the slider is slidably installed on the sliding rod.

[0011] As a preferred technical solution, a test switch is also included, which is connected to the airtightness tester.

[0012] As a preferred technical solution, the gas path detection system further includes a digital timing delay sensor, which is electrically connected to the solenoid valve control valve group and is used to delay control the inflation time, pressure stabilization time, or detection time.

[0013] As a preferred technical solution, the lead-out channel pipe is also provided with a PC inlet, and the inlet pipe is connected to the PC inlet.

[0014] As a preferred technical solution, the first detection station and the second detection station have the same structure, and their gas paths are independently or synchronously controlled.

[0015] As a preferred technical solution, the adaptive sealing head is made of an elastic material and is cone-shaped.

[0016] The beneficial effects of this utility model are: First, by setting a V-shaped positioning support on the workbench, this utility model supports and limits the motor to be tested, so that the motor maintains a stable posture during the testing process, reduces the problem of inaccurate positioning caused by manual placement deviation, and improves the consistency and repeatability of testing. II. This utility model sets an adaptive sealing head on the sealing and pressing mechanism and drives it to achieve axial pressing by a cylinder. This allows the sealing head to automatically compensate for the size deviation of the air inlet at the tail of the motor during the pressing process, thereby forming a reliable seal and avoiding misjudgment of air leakage caused by workpiece size tolerance or installation offset. Third, this utility model simultaneously performs sealing and inflation tests on the air inlet at the tail of the motor and the lead wire end during the testing process. Compared with testing only a single location, this method can more comprehensively reflect the overall airtightness of the motor and improve the accuracy of the test results. IV. By setting up a first inspection station and a second inspection station, this utility model enables the device to simultaneously or alternately perform airtightness testing on two motors, reducing the waiting time for single-piece testing and significantly increasing the number of tests per unit time, making it suitable for use in mass production lines. V. This utility model is equipped with a pressure regulating valve, a solenoid valve control valve group, a digital pressure sensor and a digital timing delay sensor to control and monitor the inflation time, pressure stabilization time and detection time during the detection process, which helps to maintain stable detection pressure and reduce the impact of gas source fluctuations on the detection results. Attached Figure Description To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a top view of the present invention; Figure 3This is a side view of the present invention. Explanation of reference numerals in the attached figures: 1. Frame; 2. Workbench; 12. Cylinder; 11. Pressure head; 6. Adaptive sealing head; 7. Tail air inlet; 8. Lead wire channel pipe; 14. Sealing adjustment base plate; 13. Quick support clamp; 5. Connecting nut; 17. Nut fixing block; 15. Square locking block; 22. Slider; 16. Slide rod; 19. Digital pressure sensor; 9. Air tightness tester; 3. Test switch; 18. Digital timing delay sensor; 21. Pipeline PC air inlet; 4. Motor lead wire; 10. Motor to be tested; 20. Solenoid valve control valve group. Detailed Implementation

[0018] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.

[0019] Any feature disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by other equivalent or similar features, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.

[0020] like Figures 1-3 As shown in a specific embodiment of this utility model, an adaptive sealing dual-station dual-channel airtightness testing device is installed as a whole in the production testing area. Its main body consists of a frame 1, which serves as a load-bearing and supporting element. A workbench 2 is fixedly installed above the frame 1. The workbench 2 is a planar structure used to install various functional components related to the testing and to support the motor to be tested. A first testing station and a second testing station are arranged side-by-side along the horizontal direction on the workbench 2. Both have identical structures and can work independently or synchronously under the same control logic, thereby achieving simultaneous or alternating testing at both stations and improving overall testing efficiency.

[0021] Each testing station is equipped with a V-shaped positioning support block, which is fixedly installed on the workbench 2. Its upper surface forms a V-shaped groove structure for supporting the motor. Before testing, the motor to be tested is placed on the V-shaped positioning support block. The V-shaped structure limits the cylindrical shape of the motor, so that the motor maintains a stable position during the testing process and avoids the sealing effect and test results being affected by shaking or displacement.

[0022] A sealing and pressing mechanism is provided on one side of the V-shaped positioning support block. This sealing and pressing mechanism includes a cylinder 12 arranged along the motor axis. The cylinder 12 is fixedly mounted on the workbench 2 or the frame 1, with its output end facing the motor to be tested. The output end of the cylinder 12 is connected to a pressure head 11, which reciprocates linearly along the motor axis under the drive of the cylinder 12. By controlling the extension and retraction of the cylinder 12, the pressure head 11 can be moved towards or away from the motor, thereby achieving the pressing and releasing of the sealing assembly.

[0023] An adaptive sealing head 6 is installed on the side of the motor to be tested away from the sealing and pressing mechanism. The adaptive sealing head 6 is positioned opposite the air inlet 7 at the tail of the motor. The adaptive sealing head 6 is made of elastic material and has an overall conical structure. When the cylinder 12 pushes the pressure head 11 towards the motor, the adaptive sealing head 6 is pressed against the air inlet 7 at the tail of the motor due to the relative positional relationship between the motor body and the sealing and pressing mechanism. Because the adaptive sealing head 6 has elasticity and a conical structure, it can adaptively deform according to the dimensional and positional deviations of the air inlet 7 at the tail of the motor during the pressing process, thereby forming a reliable seal with the air inlet 7 at the tail of the motor and avoiding air leakage caused by machining tolerances.

[0024] A lead wire channel tube 8 is provided on the side of the V-shaped positioning support block. The lead wire channel tube 8 is used to guide and seal the motor lead wire 4. One end of the lead wire channel tube 8 is positioned close to the motor lead wire 4, and the motor lead wire 4 passes through the lead wire channel tube 8. The lead wire channel tube 8 is mounted on the sealing adjustment base plate 14, which is fixed on the worktable 2 and is used to support and adjust the position of the lead wire sealing assembly.

[0025] The lead wire sealing assembly includes a quick-release clamp 13 and a connecting nut 5 fixing block. The quick-release clamp 13 is located on one side of the sealing adjustment base plate 14 and is used to quickly position and clamp one end of the lead wire channel tube 8, so that the lead wire channel tube 8 remains stable during the testing process. The connecting nut 5 fixing block is located on the side of the sealing adjustment base plate 14 away from the quick-release clamp 13. The connecting nut 5 is supported and installed on the nut fixing block 17. The connecting nut 5 is threadedly connected to the other end of the lead wire channel tube 8. By tightening the connecting nut 5, the motor lead wire 4 forms a seal at the connecting nut 5, thereby achieving an airtight seal at the lead wire end.

[0026] Furthermore, a square locking block 15 is installed on the lead wire channel tube 8, and a slider 22 is provided at the bottom of the square locking block 15. A sliding rod 16 that cooperates with the slider 22 is provided on the sealing adjustment base plate 14. The slider 22 is slidably installed on the sliding rod 16. Through the sliding cooperation, the position of the lead wire channel tube 8 can be finely adjusted to adapt to motors of different lengths or different lead wire positions, thereby improving the versatility of the device.

[0027] A PC inlet 21 is also provided on the lead wire channel pipe 8. The inlet pipe is connected to the lead wire channel pipe 8 through the PC inlet 21, so that the detection gas can enter the motor or the lead wire sealing area through the lead wire channel pipe 8 to realize the inflation detection of the lead wire end.

[0028] The device also includes a gas path detection system, which comprises a pressure regulating valve, a solenoid valve control valve group 20, a digital pressure sensor 19, and an airtightness tester 9. All gas path components are connected via pipelines to form a complete gas path. The pressure regulating valve is used to adjust the gas source pressure entering the detection system to obtain a stable detection pressure; the solenoid valve control valve group 20 is used to control the on / off state and flow direction of the detection gas, enabling the detection gas to enter the first and second detection stations in a set sequence. The digital pressure sensor 19 is used to acquire pressure change signals in real time during the detection process; the airtightness tester 9 is used to process the pressure signals and output the detection results.

[0029] The air circuit detection system is connected to the adaptive sealing head 6 and the lead wire sealing assembly of the first and second detection stations through pipelines, so as to simultaneously perform air inflation detection on the air inlet 7 at the tail of the motor and the lead wire end during the detection process.

[0030] The gas path detection system is also equipped with a digital timing delay sensor 18, which is electrically connected to the solenoid valve control valve group 20. It is used to delay and control the gas charging time, pressure stabilization time and detection time during the detection process, so that the detection process is carried out in the predetermined time sequence and the detection results are not affected by the gas not being sufficiently stable.

[0031] The device also includes a control and detection module, which is electrically connected to the air tightness tester 9 and the digital pressure sensor 19. It is used to collect pressure change signals generated during the test and to determine whether the motor under test has a leakage defect based on the pressure change. At the same time, the device is also equipped with a test switch 3, which is connected to the air tightness tester 9 for manually triggering the test process.

[0032] During the actual testing process, the operator places the motor to be tested on the V-shaped positioning support block of the corresponding testing station, so that the motor lead wire 4 is inserted into the lead wire channel tube 8, and the lead wire end is sealed and fixed by the quick support clamp 13 and the connecting nut 5.

[0033] Then, test switch 3 is activated, cylinder 12 actuates, pushing pressure head 11 to form a sealed connection between adaptive sealing head 6 and the air inlet 7 at the motor tail. The solenoid valve control valve group 20 opens sequentially under the control of digital timing delay sensor 18. The detection gas, after being regulated by the pressure regulating valve, enters the motor interior and the lead wire sealing area. After the inflation stage, it enters the pressure stabilization stage. After pressure stabilization, it enters the detection stage. Digital pressure sensor 19 collects pressure change signals in real time and transmits them to the airtightness tester 9 and the control and detection module. If the pressure change exceeds the allowable range within the set detection time, the motor is determined to have a leak; if the pressure remains stable, the motor is determined to be airtight.

[0034] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions conceived without inventive effort should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope defined in the claims.

Claims

1. An adaptive sealing type dual-station dual-channel airtightness testing device, characterized in that, include: A frame (1) is provided with a worktable (2); The first and second inspection stations are arranged side by side on the workbench (2); Each testing station includes: A V-shaped positioning support block is set on the workbench (2) to support and position the motor to be tested; The sealing and pressing mechanism is set on one side of the V-shaped positioning support, including a cylinder (12) arranged along the motor axis and a pressure head (11) connected to the output end of the cylinder (12); An adaptive sealing head (6) is installed on the side of the motor to be tested away from the sealing and pressing mechanism. It is positioned opposite to the air inlet (7) at the tail of the motor and is used to form a sealed connection with the tail of the motor under the push of the cylinder (12). The lead wire channel tube (8) is set on the side of the V-shaped positioning support to accommodate the motor lead wire (4); The lead wire sealing assembly is installed on a sealing adjustment base plate (14) and includes a quick support clamp (13) and a connecting nut (5) fixing block. The quick support clamp (13) is used to position and clamp one end of the lead wire channel tube (8). The connecting nut (5) is sealed and installed at the other end of the lead wire channel tube (8). The motor lead wire (4) is sealed and installed on one side of the lead wire channel tube (8) through the connecting nut (5). The air circuit detection system includes a pressure regulating valve, a solenoid valve control valve group (20), a digital pressure sensor (19), and an air tightness tester (9). The air circuit detection system is connected to the adaptive sealing head (6) and the lead wire sealing assembly of the first detection station and the second detection station respectively through pipelines, and is used to simultaneously perform air inflation detection on the tail end of the motor and the lead wire end. The control and detection module is electrically connected to the airtightness tester (9) and the digital pressure sensor (19) and is used to collect pressure changes and determine the detection results.

2. The adaptive sealing dual-station dual-channel airtightness testing device according to claim 1, characterized in that: A nut fixing block (17) is also provided on the side of the sealing adjustment base plate (14) away from the quick support clamp (13), and the connecting nut (5) is supported and installed on the nut fixing block (17).

3. The adaptive sealing dual-station dual-channel airtightness testing device according to claim 2, characterized in that: A square locking block (15) is installed on the lead-out channel tube (8). A slider (22) is provided at the bottom of the square locking block (15). A sliding rod (16) is provided on the sealing adjustment base plate (14). The slider (22) is slidably installed on the sliding rod (16).

4. The adaptive sealing dual-station dual-channel airtightness testing device according to claim 1, characterized in that: It also includes a test switch (3) connected to the airtightness tester (9).

5. The adaptive sealing dual-station dual-channel airtightness testing device according to claim 1, characterized in that: The gas path detection system also includes a digital timing delay sensor (18), which is electrically connected to the solenoid valve control valve group (20) and is used to delay control the inflation time, pressure stabilization time or detection time.

6. The adaptive sealing dual-station dual-channel airtightness testing device according to claim 1, characterized in that: The lead-out channel pipe (8) is also provided with a PC inlet port (21), and the inlet pipe is connected to the PC inlet port (21).

7. The adaptive sealing dual-station dual-channel airtightness testing device according to claim 1, characterized in that: The first and second detection stations have the same structure, and their gas paths are either independently or synchronously controlled.

8. The adaptive sealing dual-station dual-channel airtightness testing device according to claim 1, characterized in that: The adaptive sealing head (6) is made of elastic material and is cone-shaped.

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