A kind of driving axle sleeve sealing detection device

Abstract

The application relates to a driving shaft sleeve sealing detection device and relates to the field of automobile part detection technology, which comprises a tee pipe and a rubber sleeve. A pressure gauge is fixedly installed on the tee pipe. The tee pipe comprises an air inlet and an air outlet. A connecting head is installed on the air outlet. A gas channel for gas circulation is formed in the connecting head along the length direction. One end of the rubber sleeve is detachably connected with the connecting head. The end of the rubber sleeve, which is away from the connecting head, is detachably installed on the outer side wall of the shaft sleeve. The air inlet is connected with a gas conveying pipeline of an external air pump. The application can improve the precision of air tightness detection on the shaft sleeve.

Description

Technical Field

[0001] This application relates to the field of automotive parts inspection technology, and in particular to a device for testing the sealing performance of a drive shaft bushing. Background Technology

[0002] The bushing is a crucial component on the drive shaft. Its outer surface mates with the oil seal on the automotive transmission differential, while its inner bore surface requires a tight, sealing interference fit with the inner CV joint housing. Therefore, the inner bore surface of the bushing and the mating surfaces of the inner CV joint housing are precision ground to achieve high-precision surface finish. To ensure product quality, the bushing's sealing performance must be tested after machining to prevent oil leaks during subsequent use due to poor sealing.

[0003] In existing technologies, the sealing performance of bushings is mainly tested through water pressure sealing tests. During the test, the operator connects the bushing to the air supply pipe of an external air pump, immerses the bushing in a test water tank, and inflates it with air using the external air pump. After a certain period of time, the operator observes whether air bubbles appear in the water and evaluates the sealing performance of the bushing based on the presence or absence of air bubbles.

[0004] However, the above-mentioned testing methods are insufficient to accurately determine the air pressure in the air path where the bushing is located. Since the bushing needs to be evaluated for its sealing performance under a given air pressure, the method of relying on the operator's experience to judge the pressure in the test air path where the bushing is located is not very accurate and cannot meet the needs of bushing air tightness testing. Utility Model Content

[0005] To improve the accuracy of airtightness testing of bushings, this application provides a device for testing the sealing performance of drive shaft bushings.

[0006] The drive shaft bushing sealing performance testing device provided in this application adopts the following technical solution:

[0007] A drive shaft bushing sealing performance testing device includes a three-way pipe and a rubber sleeve. A pressure gauge is fixedly installed on the three-way pipe. The three-way pipe includes an air inlet and an air outlet. A connector is installed on the air outlet. The connector has an air passage for gas flow along its length. One end of the rubber sleeve is detachably connected to the connector. The end of the rubber sleeve away from the connector is detachably installed on the outer side wall of the bushing.

[0008] The air inlet is connected to the air delivery pipeline of an external air pump.

[0009] By adopting the above technical solution, during the sealing test of the bushing, the operator can pre-fix one end of the rubber sleeve to the connector and the end of the rubber sleeve away from the connector to the bushing, and connect the air inlet of the tee pipe to the air supply pipe of the external air pump. Then, the operator can immerse the bushing, rubber sleeve, and tee pipe below the surface of the test water tank, and start the air pump to sequentially supply air to the bushing through the air supply pipe, tee pipe, connector, and rubber sleeve, causing the air pressure to gradually increase. During this process, the operator observes the pressure gauge reading in real time. When the pressure gauge reading reaches the required test pressure value, the operator observes whether there are air bubbles in the test water tank. If air bubbles are present in the test water tank, the bushing is considered to have a poor seal; if no air bubbles are present, the bushing is considered to have a good seal. By setting a pressure gauge on the three-way pipe, operators can easily monitor the air pressure in the gas flow circuit during the airtightness test of the bushing. This ensures that the sealing performance of the bushing is judged when the set pressure value is reached, thus guaranteeing the accuracy of the bushing sealing test.

[0010] Preferably, the rubber sleeve is equipped with a first clamp and a second clamp, with the end of the rubber sleeve near the connector abutting between the first clamp and the connector, and the end of the rubber sleeve away from the connector abutting between the second clamp and the bushing.

[0011] By adopting the above technical solution, the two ends of the rubber sleeve can be fixed to the connector and the bushing by the first clamp and the second clamp, so as to achieve a sealed connection between the connector and the bushing and facilitate the input of air into the bushing.

[0012] Preferably, the rubber sleeve is a rubber corrugated sleeve.

[0013] By adopting the above technical solutions, the rubber corrugated sleeve has good flexibility and bendability, and can adapt to complex installation environments and bending requirements.

[0014] Preferably, the pressure gauge is an electromagnetic pressure gauge, and further includes:

[0015] The bubble detection module is fixedly installed on the inner wall of the test water tank to detect bubbles in the test water tank and output a bubble quantity signal.

[0016] The comparator chip has its signal input terminal connected to the signal output terminal of the pressure gauge and its signal output terminal connected to the signal output terminal of the bubble detection module. It is used to control the bubble detection module to start when the pressure of the input sleeve reaches the set value.

[0017] The display has its signal output terminal connected to the signal input terminal of the bubble detection module, and is used to receive and display the bubble quantity signal.

[0018] By employing the above technical solution, and through the coordinated use of an electromagnetic pressure gauge, comparator chip, bubble detection module, and display, during the bushing sealing test, the pressure gauge monitors the gas pressure in the gas delivery circuit in real time and outputs a gas pressure signal. The comparator chip receives the gas pressure signal and compares it. When the gas pressure in the detection circuit reaches the set pressure value, the comparator chip outputs a control signal. After receiving the control signal, the bubble detection module automatically detects the amount of bubbles in the test water tank and outputs a bubble quantity signal. The operator can monitor the sealing performance of the bushing during the sealing test through the display connected to the bubble detection module, and more accurately evaluate the sealing performance of the bushing based on the amount of bubbles, so as to judge the degree of leakage of the bushing.

[0019] Preferably, the bubble detection module includes:

[0020] The ultrasonic transmitter is fixedly installed on the inner wall of the test pool, below the water surface and above the bushing. Its signal input terminal is connected to the signal output terminal of the comparator chip and is used to transmit ultrasonic signals.

[0021] The ultrasonic receiver, with its signal input terminal connected to the signal output terminal of the comparator chip, is fixedly installed on the inner wall of the test water tank, opposite to the ultrasonic transmitter, and is used to receive the ultrasonic signal and output an intensity sensing signal.

[0022] The microcontroller has its signal input terminal connected to the signal output terminal of the ultrasonic receiver, and its signal output terminal connected to the signal input terminal of the display. It is used to receive the intensity sensing signal and output the bubble quantity signal.

[0023] By adopting the above technical solution, when the pressure gauge reaches the set pressure value, the ultrasonic transmitter and ultrasonic receiver start simultaneously. The ultrasonic transmitter emits an ultrasonic signal, and the ultrasonic receiver receives the ultrasonic signal and can detect the signal intensity. Since bubbles in the water have a strong absorption effect on ultrasonic waves, the microcontroller can calculate the amount of bubbles in the test water tank based on the intensity sensing signal output by the ultrasonic receiver, thus achieving the technical effect of automatically detecting the amount of bubbles.

[0024] In summary, the drive shaft bushing sealing performance testing device of this application has at least one of the following beneficial technical effects:

[0025] 1. By setting a pressure gauge on the three-way pipe, the operator can easily monitor the air pressure in the gas flow circuit during the air tightness test of the bushing, ensuring that the sealing performance of the bushing is judged when the set pressure value is reached, thus ensuring the accuracy of the bushing sealing test.

[0026] 2. Rubber corrugated sleeves have good flexibility and bendability, and can adapt to complex installation environments and bending requirements. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of Embodiment 1 of this application used to illustrate the overall structure of the bushing.

[0028] Figure 2 This is a schematic diagram of Embodiment 1 of this application used to illustrate the overall structure of the detection device.

[0029] Figure 3 This is a schematic diagram of Embodiment 2 of this application, illustrating the installation position of the bubble detection module in the test water tank.

[0030] Figure 4 This is a schematic diagram of embodiment 2 of this application used to illustrate the signal transmission of the bubble detection module.

[0031] Explanation of reference numerals in the attached diagram: 1. Tee; 11. Air inlet; 12. Air outlet; 2. Rubber sleeve; 3. Pressure gauge; 4. Connector; 5. Bushing; 6. First clamp; 7. Second clamp; 8. Test water tank; 81. Ultrasonic transmitter; 82. Ultrasonic receiver. Detailed Implementation

[0032] The following combination Figures 1-4 This application will be described in further detail.

[0033] Example 1

[0034] This application discloses a device for detecting the sealing performance of a drive shaft bushing. (Refer to...) Figure 1 The bushing 5 is coaxially sealed and installed on the inner ball cage housing. (Refer to...) Figure 2 The detection device mainly includes a three-way pipe 1 and a rubber sleeve 2. A pressure gauge 3 is fixedly installed on the three-way pipe 1. The three-way pipe 1 includes an air inlet 11 and an air outlet 12. A connector 4 is installed on the air outlet 12. The connector 4 has an air passage for gas flow through it along its length. One end of the rubber sleeve 2 is detachably connected to the connector 4. The end of the rubber sleeve 2 away from the connector 4 is detachably installed on the outer wall of the bushing 5. The air inlet 11 is connected to the air supply pipeline of an external air pump.

[0035] It should be noted that in this embodiment, one end of the connector 4 is integrally formed with a threaded connection part having external threads, and the inner wall of the air outlet 12 of the tee pipe 1 is provided with internal threads. The threaded connection part is installed at the air outlet 12 of the tee pipe 1 by means of threaded connection.

[0036] During the sealing test of bushing 5, the operator can fix one end of rubber sleeve 2 to connector 4 in advance, fix the end of rubber sleeve 2 away from connector 4 to bushing 5, and connect the air inlet 11 of tee pipe 1 to the air supply pipeline of external air pump.

[0037] It should be noted that in this embodiment, the end of the connector 4 away from the tee pipe 1 is fitted with an interface that matches the end of the inner ball cage shell that extends out. During the installation of the testing device, the operator inserts the end of the inner ball cage shell that extends out into the interface of the connector 4 and then installs the rubber sleeve 2 on the outer wall of the bushing 5.

[0038] Subsequently, the operator can immerse the bushing 5, rubber sleeve 2, and T-connector 1 below the water surface of the test water tank 8, and start the air pump to sequentially supply air to the bushing 5 through the air supply pipe, T-connector 1, connector 4, and rubber sleeve 2, causing the air pressure to gradually increase. During this process, the operator observes the reading of the pressure gauge 3 in real time. When the reading of the pressure gauge 3 reaches the required test pressure value, the operator observes whether there are air bubbles in the test water tank 8. If air bubbles are present in the water of the test water tank 8, it is determined that the bushing 5 is not properly sealed; if no air bubbles are present in the water of the test water tank 8, it is determined that the bushing 5 is properly sealed.

[0039] By setting the pressure gauge 3 on the three-way pipe 1, the operator can easily control the air pressure in the gas flow circuit during the air tightness test of the bushing 5, and ensure that the sealing performance of the bushing 5 is judged when the set pressure value is reached, thus ensuring the accuracy of the sealing test of the bushing 5.

[0040] Reference Figure 2 The rubber sleeve 2 is equipped with a first clamp 6 and a second clamp 7. The end of the rubber sleeve 2 near the connector 4 is pressed between the first clamp 6 and the connector 4, and the end of the rubber sleeve 2 away from the connector 4 is pressed between the second clamp 7 and the bushing 5.

[0041] The first clamp 6 and the second clamp 7 can fix both ends of the rubber sleeve 2 to the connector 4 and the bushing 5, so as to achieve a sealed connection between the connector 4 and the bushing 5 and facilitate the input of air into the bushing 5.

[0042] In this embodiment, the rubber sleeve 2 is a rubber corrugated sleeve. The rubber corrugated sleeve has good flexibility and bendability, and can adapt to complex installation environments and bending requirements.

[0043] Example 2

[0044] In this embodiment, the pressure gauge 3 is an electromagnetic pressure gauge 3, which can monitor the air pressure in the detection air path where the bushing 5 is located in real time and output an air pressure signal. It also includes: a bubble detection module, fixedly installed on the inner wall of the test water tank 8, used to detect bubbles in the test water tank 8 and output a bubble quantity signal; a comparator chip, whose signal input terminal is connected to the signal output terminal of the pressure gauge 3, and whose signal output terminal is connected to the signal output terminal of the bubble detection module, used to control the bubble detection module to start when the pressure of the input bushing 5 reaches a set value; and a display, whose signal output terminal is connected to the signal output terminal of the bubble detection module, used to receive and display the bubble quantity signal.

[0045] By using the electromagnetic pressure gauge 3, comparator chip, bubble detection module, and display in combination, during the sealing test of bushing 5, pressure gauge 3 monitors the gas pressure in the gas delivery circuit in real time and outputs a gas pressure signal. The comparator chip receives the gas pressure signal and compares it. When the gas pressure in the detection circuit reaches the set pressure value, the comparator chip outputs a control signal. After receiving the control signal, the bubble detection module automatically detects the amount of bubbles in the test water tank 8 and outputs a bubble quantity signal. The operator can monitor the sealing performance of bushing 5 during the sealing test through the display connected to the bubble detection module signal, and evaluate the sealing performance of bushing 5 more accurately based on the amount of bubbles, so as to judge the degree of leakage of bushing 5.

[0046] Reference Figure 3 and Figure 4 In this embodiment, the bubble detection module includes: an ultrasonic transmitter 81, fixedly installed on the inner wall of the test water tank 8, located below the water surface and above the bushing 5, with its signal input terminal connected to the signal output terminal of the comparator chip via a wireless signal connection, for transmitting ultrasonic signals; an ultrasonic receiver 82, with its signal input terminal connected to the signal output terminal of the comparator chip via a wireless signal connection, fixedly installed on the inner wall of the test water tank 8, opposite to the ultrasonic transmitter 81, for receiving ultrasonic signals and outputting intensity sensing signals; and a microcontroller, with its signal input terminal connected to the signal output terminal of the ultrasonic receiver 82 via a wireless signal connection, and its signal output terminal connected to the signal input terminal of the display via a wireless signal connection, for receiving intensity sensing signals and outputting bubble quantity signals.

[0047] It should be noted that in this embodiment, the display is mounted on the operating table, and the microcontroller and comparator chip are integrated into the control box on the operating table, which is not shown in the accompanying drawings.

[0048] When pressure gauge 3 reaches the set pressure value, ultrasonic transmitter 81 and ultrasonic receiver 82 start simultaneously. Ultrasonic transmitter 81 emits ultrasonic signals, and ultrasonic receiver 82 receives ultrasonic signals and can detect the signal intensity. Since bubbles in the water have a strong absorption effect on ultrasonic waves, the microcontroller can calculate the amount of bubbles in the test water tank 8 based on the intensity sensing signal output by ultrasonic receiver 82, thus achieving the technical effect of automatically detecting the amount of bubbles.

[0049] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A device for detecting the sealing performance of a drive shaft bushing, characterized in that, It includes a three-way pipe (1) and a rubber sleeve (2). A pressure gauge (3) is fixedly installed on the three-way pipe (1). The three-way pipe (1) includes an air inlet (11) and an air outlet (12). A connector (4) is installed on the air outlet (12). The connector (4) has a gas passage for gas flow through it along its length. One end of the rubber sleeve (2) is detachably connected to the connector (4). The end of the rubber sleeve (2) away from the connector (4) is detachably installed on the outer wall of the bushing (5). The air inlet (11) is connected to the air delivery pipe of an external air pump.

2. The drive shaft bushing sealing performance testing device according to claim 1, characterized in that, The rubber sleeve (2) is equipped with a first clamp (6) and a second clamp (7). The end of the rubber sleeve (2) close to the connector (4) is pressed between the first clamp (6) and the connector (4), and the end of the rubber sleeve (2) away from the connector (4) is pressed between the second clamp (7) and the bushing (5).

3. The drive shaft bushing sealing performance testing device according to claim 2, characterized in that, The rubber sleeve (2) is a rubber corrugated sleeve.

4. The drive shaft bushing sealing performance testing device according to claim 3, characterized in that, The pressure gauge (3) is an electromagnetic pressure gauge (3), and also includes: The bubble detection module is fixedly installed on the inner wall of the test water tank (8) to detect bubbles in the test water tank (8) and output bubble quantity signal; The comparator chip has its signal input terminal connected to the signal output terminal of the pressure gauge (3) and its signal output terminal connected to the signal output terminal of the bubble detection module. It is used to control the bubble detection module to start when the pressure of the input sleeve (5) reaches the set value. The display has its signal output terminal connected to the signal input terminal of the bubble detection module, and is used to receive and display the bubble quantity signal.

5. The drive shaft bushing sealing performance testing device according to claim 4, characterized in that, The bubble detection module includes: The ultrasonic transmitter (81) is fixedly installed on the inner wall of the test water tank (8), located below the water surface and above the bushing (5). The signal input end is connected to the signal output end of the comparator chip and is used to transmit ultrasonic signals. The ultrasonic receiver (82) has its signal input terminal connected to the signal output terminal of the comparator chip. It is fixedly installed on the inner wall of the test water tank (8) and is opposite to the ultrasonic transmitter (81). It is used to receive the ultrasonic signal and output the intensity sensing signal. The microcontroller has its signal input terminal connected to the signal output terminal of the ultrasonic receiver (82), and its signal output terminal connected to the signal input terminal of the display. It is used to receive the intensity sensing signal and output the bubble quantity signal.

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