A kind of gearbox taper pipe thread plug air tightness testing device

Abstract

The utility model discloses a transmission cone pipe thread plug airtightness testing arrangement, its airtight container, clamp and plug body, the clamp is used for fixing airtight container and installs plug body, the both sides of airtight container are connected with pipe thread adapter, is connected with the air inlet pipe and air outlet pipe on pipe thread adapter, the end of air outlet pipe sets up in the water cup, tests the leakproofness of plug through observing whether there is bubble in the water cup. The utility model adopts cutting transmission shell as airtight container and tests plug airtightness, has reached simple operation and can accurate test plug leakproofness effect.

Description

Technical Field

[0001] This utility model relates to the field of airtightness testing technology for mechanical components, and in particular to an airtightness testing device for a tapered pipe thread plug of a gearbox. Background Technology

[0002] In the automotive manufacturing industry, the transmission, as one of the core components of power transmission, is of paramount importance in terms of reliability and lifespan. Transmission plugs, as key components in the transmission system used for sealing or limiting, are primarily used to prevent oil leakage, isolate external contaminants, and assist in assembly positioning; their sealing performance directly affects the overall performance of the transmission. With the continuous development of the automotive industry, the requirements for the sealing performance of transmission plugs are becoming increasingly stringent. Therefore, the sealing performance testing of transmission plugs has always been a focus of major automotive OEMs. NPTF, a type of dry-seal tapered pipe thread used in fuel, hydraulic, and pneumatic systems, is commonly used for sealing oil holes in transmissions, engines, or hydraulic systems; accurate testing of its sealing performance is therefore particularly important.

[0003] In the past, various methods were commonly used in the industry to test the sealing performance of transmission plugs. One common method was to use pressure sensors to detect pressure changes at the plug seal to determine if leaks were present. This method required installing pressure sensors at specific locations and monitoring pressure fluctuations in real time. Some companies also used visual inspection, observing for signs such as oil seepage around the plug to make a preliminary assessment of its sealing condition. Additionally, some manufacturers conducted tests simulating real-world operating conditions, placing the components with the plugs installed in a simulated working environment for a period of time and then checking for leaks.

[0004] However, existing testing methods have certain limitations. Pressure sensor detection may be affected by external environmental factors, leading to inaccurate pressure readings and an inability to accurately determine the presence of minute leaks. Visual inspection can only detect relatively obvious leaks and is difficult to detect minute leaks. Simulating actual working conditions requires a long time and high cost, and the test results may be affected by various factors, failing to reflect the sealing performance of the plug in a timely and accurate manner. Utility Model Content

[0005] This application provides a test device for the airtightness of a tapered pipe thread plug in a gearbox. The device uses a cut gearbox housing as an airtight container to test the airtightness of the plug, achieving the effect of simple operation and accurate testing of the plug's sealing performance.

[0006] This application provides a test device for the airtightness of a gearbox tapered pipe thread plug, which adopts the following technical solution: A test device for airtightness of a gearbox tapered pipe thread plug includes an airtight container, a clamp, and a plug body. The clamp is used to fix the airtight container and install the plug body. Pipe thread adapters are connected to both sides of the airtight container. An air inlet pipe and an air outlet pipe are connected to the pipe thread adapters. The end of the air outlet pipe is placed inside a water cup. The sealing performance of the plug body is tested by observing whether there are air bubbles in the water cup.

[0007] By adopting the above technical solution, this utility model designs a gearbox tapered pipe thread plug airtightness testing device. In use, the gearbox housing is cut to serve as an airtight container. The airtight container is fixed with a clamp, and the plug body is installed on the airtight container. An air inlet pipe and an air outlet pipe are installed on both sides of the airtight container. The air outlet pipe is placed in a water cup. After air is introduced, the presence of air bubbles in the water cup is observed to determine whether the plug body has good sealing performance.

[0008] Preferably, the airtight container is provided with a test hole, and the plug body is sealed to the test hole.

[0009] By adopting the above technical solution, when in use, a test hole is set on the airtight container, and the plug body is sealed to the test hole, so that the plug body can be accurately installed on the airtight container for sealing test.

[0010] Preferably, a driving mechanism is provided on the top of the plug body, and the plug body is screwed into the test hole through the driving mechanism.

[0011] By adopting the above technical solution, the plug body can be screwed into the test hole using a drive mechanism during use, thus achieving a sealed installation of the plug body.

[0012] Preferably, the airtight container is formed by cutting the gearbox housing.

[0013] By adopting the above technical solution, the cut gearbox housing can be used as an airtight container during use, allowing existing components to be used directly and reducing the cost of the testing equipment.

[0014] Preferably, a sealing ring groove is provided at the edge of the connection between the pipe thread adapter and the airtight container, and a sealing flange that mates with the sealing ring groove is provided on the outer wall of the plug body.

[0015] By adopting the above technical solution, a sealing ring groove is set at the edge of the connection between the pipe thread adapter and the airtight container during use, and a sealing flange that mates with the sealing ring groove is set on the outer wall of the plug body. This can enhance the sealing performance of the connection between the pipe thread adapter and the airtight container, further prevent air leakage during the test, and improve the accuracy of the test.

[0016] Preferably, one end of the air intake pipe is connected to an air intake device, which is used to control the amount of gas entering the airtight container.

[0017] By adopting the above technical solution, the amount of gas entering the airtight container can be controlled by connecting the air intake device to the air intake pipe during use, so that the amount of gas can be precisely adjusted during the test, thereby improving the accuracy of the plug airtightness test.

[0018] Preferably, the drive mechanism further includes a torque sensor, which is disposed at the output end of the drive mechanism to monitor the torque value when the plug is tightened.

[0019] By adopting the above technical solution, the torque sensor can accurately obtain the torque value when the plug body is tightened during use, which helps to analyze the sealing performance of the plug body under different torques and provides data support for optimizing the installation torque of the plug body.

[0020] Preferably, the water cup is provided with a fixing bracket for fixing the air outlet pipe.

[0021] By adopting the above technical solution, a fixing bracket for fixing the vent pipe is set inside the water cup during use, which can keep the vent pipe stable during the test and avoid shaking or displacement that would affect the accuracy of the test results.

[0022] In summary, this application has the following beneficial effects: 1. This utility model relates to a test device for the airtightness of a gearbox tapered pipe thread plug. The test scheme is accurate and can accurately test the sealing performance of the plug by observing whether there are air bubbles in the water cup. This solves the problems of existing test methods being affected by external interference, unable to fully detect or detect minute leaks. 2. The present invention provides a test device for the air tightness of a gearbox tapered pipe thread plug. It is simple and convenient to operate, has strong innovative performance, and is suitable for use by various automotive parts suppliers. It solves the problems of long testing time and high cost in simulating actual working conditions. 3. The present invention relates to a gearbox tapered pipe thread plug air tightness testing device, which uses a pipe thread adapter with high strength, hardness, air tightness and corrosion resistance to connect the housing and the air inlet pipe, thereby preventing air leakage during the test. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of an embodiment; Figure 2 This is an enlarged schematic diagram showing the hole to be tested in the embodiment; Explanation of reference numerals in the attached drawings: 1. Airtight container; 2. Clamp; 3. Plug body; 4. Pipe thread adapter; 5. Air inlet pipe; 6. Air outlet pipe; 7. Water cup; 8. Test hole; 9. Drive mechanism; 10. Air inlet device. Detailed Implementation

[0024] The present invention will be further described in detail below with reference to the accompanying drawings. Identical components are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," "lower," "bottom," and "top" used in the following description refer to directions in the accompanying drawings, while the terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0025] This utility model discloses a device for testing the airtightness of a tapered pipe thread plug for a gearbox, such as... Figure 1 and Figure 2 As shown, the device includes an airtight container 1, a clamp 2, a plug body 3, a pipe thread adapter 4, an air inlet pipe 5, an air outlet pipe 6, a water cup 7, a drive mechanism 9, an air intake device 10, a torque sensor, and a fixing bracket. The clamp 2 is used to fix the airtight container 1 and install the plug body 3. The pipe thread adapter 4 is connected to both sides of the airtight container 1. The air inlet pipe 5 and the air outlet pipe 6 are connected to the pipe thread adapter 4. The end of the air outlet pipe 6 is set in the water cup 7. The sealing performance of the plug body 3 is tested by observing whether there are air bubbles in the water cup 7. This achieves the effect of intuitively and accurately judging the sealing performance of the plug. This is because if the plug body 3 is not sealed well, the gas will leak from the plug body 3 and enter the water cup 7 through the air outlet pipe 6 to form air bubbles.

[0026] Specifically, the airtight container 1 is formed by cutting the gearbox housing. The gearbox housing itself has a certain strength and sealing performance, and after cutting, it can be used as a suitable airtight container 1. The airtight container 1 is provided with a test hole 8, and the plug body 3 is sealed to the test hole 8. The shape and size of the test hole 8 are adapted to the plug body 3 to ensure the effectiveness of the sealing connection.

[0027] Specifically, the clamp 2 includes a base and a fixing clamp. The base is used to support the airtight container 1, and the fixing clamp can be used to fix the airtight container 1 to the base by means of bolts or other methods.

[0028] Specifically, a drive mechanism 9 is provided on the top of the plug body 3, and the plug is screwed into the test hole 8 through the drive mechanism 9. The drive mechanism 9 can be a combination of a motor and a gearbox, with the motor providing power and the gearbox adjusting the speed and torque. A torque sensor is set at the output end of the gearbox to monitor the torque value when the plug body 3 is tightened. This allows for accurate control of the screwing force of the plug body 3, and different torque states such as 5NM, 10NM, 15NM, and 25NM can be set to test the leakage state of the plug body 3 under different torques.

[0029] Specifically, the pipe thread adapter 4 includes a connecting part and an adapter part. The connecting part connects to the airtight container 1, and the adapter part connects the inlet pipe 5 and the outlet pipe 6. The pipe thread adapter 4 has high strength and hardness, strong airtightness and corrosion resistance, and can prevent air leakage during testing. A sealing ring groove is provided at the edge of the connection between the pipe thread adapter 4 and the airtight container 1, and a sealing flange that mates with the sealing ring groove is provided on the outer wall of the plug body 3, further enhancing the sealing effect.

[0030] Specifically, one end of the air inlet pipe 5 is connected to an air inlet device 10, which is used to control the amount of gas entering the airtight container 1. The air inlet device 10 can be an air pump, and the amount of gas input is controlled by adjusting the power of the air pump. An alternative feature could be an air tank with a regulating valve, which can control the gas flow more precisely.

[0031] Specifically, the water cup 7 is used to accommodate the end of the vent tube 6. The sealing performance of the plug is judged by observing whether there are air bubbles inside the water cup 7. The water cup 7 is equipped with a fixing bracket for fixing the vent tube 6. The fixing bracket can be a plastic clip, which can stably fix the vent tube 6 inside the water cup 7 to prevent the vent tube 6 from shaking and affecting the observation effect.

[0032] The implementation principle of this embodiment is as follows: By cutting the gearbox housing into an airtight container 1, and combining it with components such as a pipe thread adapter 4, an air inlet pipe 5, an air outlet pipe 6, and a water cup 7, a simple yet effective airtightness testing device for the plug body 3 is formed. The drive mechanism 9 controls the plug body 3 to be screwed into the test hole 8, and the torque value is monitored by a torque sensor, accurately simulating different installation states. The air intake device 10 controls the gas input. If the plug body 3 is not properly sealed, gas will leak from the plug body 3, enter the water cup 7 through the air outlet pipe 6, and form bubbles, thus visually determining the airtightness of the plug body 3. This testing method is simple and convenient to operate, highly innovative, and suitable for use by various automotive parts suppliers. It solves the problems of existing testing methods, such as susceptibility to external interference, inability to comprehensively detect leaks, difficulty in detecting minute leaks, high cost, and long testing time, improving the accuracy and efficiency of the test.

[0033] 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 testing the airtightness of a tapered pipe thread plug for a gearbox, characterized in that: An airtight container (1), a clamp (2), and a plug body (3) are provided. The clamp (2) is used to fix the airtight container (1) and install the plug body (3). Pipe thread adapters (4) are connected to both sides of the airtight container (1). An air inlet pipe (5) and an air outlet pipe (6) are connected to the pipe thread adapters (4). The end of the air outlet pipe (6) is set inside a water cup (7). The sealing performance of the plug is tested by observing whether there are air bubbles inside the water cup (7).

2. The airtightness testing device for a gearbox tapered pipe thread plug according to claim 1, characterized in that: The airtight container (1) is provided with a test hole (8), and the plug body (3) is sealed to the test hole (8).

3. The airtightness testing device for a gearbox tapered pipe thread plug according to claim 1, characterized in that: The top of the plug body (3) is provided with a driving mechanism (9), and the plug body (3) is screwed into the test hole (8) through the driving mechanism (9).

4. The airtightness testing device for a gearbox tapered pipe thread plug according to claim 1, characterized in that: The airtight container (1) is formed by cutting the gearbox housing.

5. The airtightness testing device for a gearbox tapered pipe thread plug according to claim 1, characterized in that: The connection between the pipe thread adapter (4) and the airtight container (1) is provided with a sealing ring groove at the edge, and the outer wall of the plug body (3) is provided with a sealing flange that mates with the sealing ring groove.

6. The airtightness testing device for a gearbox tapered pipe thread plug according to claim 1, characterized in that: One end of the air inlet pipe (5) is connected to an air inlet device (10), which is used to control the amount of gas entering the airtight container (1).

7. The airtightness testing device for a gearbox tapered pipe thread plug according to claim 3, characterized in that: The drive mechanism (9) also includes a torque sensor, which is located at the output end of the drive mechanism (9) to monitor the torque value when the plug is tightened.

8. The airtightness testing device for a gearbox tapered pipe thread plug according to claim 1, characterized in that: The water cup (7) is provided with a fixing bracket for fixing the air outlet pipe (6).

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