A kind of gear reducer shell airtightness detection tool

Abstract

This utility model discloses a fixture for testing the airtightness of a speed reducer housing, including a testing platform. A gantry frame is fixedly connected to the top of the testing platform, and a testing component for fixing the speed reducer housing to be tested is installed on the gantry frame. A testing water tank for testing the airtightness of the speed reducer housing is installed on the top of the testing platform, corresponding to the position of the testing component. This utility model adopts a multi-seal structure composed of a Y-type sealing ring and a stepped sealing ring, which seals simultaneously from both the inner and outer sides, greatly improving the sealing effect on the speed reducer housing, effectively preventing gas leakage during testing, and ensuring testing accuracy. An electric push rod drives an L-shaped sliding pressure rod in conjunction with a return spring to firmly press the housing, preventing shaking from affecting the results. An electric cylinder can be used to easily insert the housing into the testing water tank, and the airtightness can be quickly determined by observing bubbles. The operation is simple and efficient.

Description

Technical Field

[0001] This utility model relates to the field of airtightness testing fixtures, and in particular to an airtightness testing fixture for a speed reducer housing. Background Technology

[0002] In the manufacturing process of speed reducers, airtightness testing is a crucial step in ensuring the quality of the reducer. Speed ​​reducers with poor airtightness are prone to problems such as oil leakage during use, affecting their normal operation and service life. Therefore, it is necessary to use effective airtightness testing fixtures to inspect the speed reducer housing.

[0003] Currently, some gearbox housing airtightness testing fixtures exist on the market, such as the leak-proof gearbox housing airtightness testing fixture with publication number CN222812517U. This fixture includes a base, supports, and a top plate. Two supports are fixedly connected to the upper surface of the base, and a water tank is fixedly connected to the center of the upper surface of the base. The supports are fixedly connected to the sides of the water tank on their adjacent sides. The bottom of the top plate is fixedly connected to the upper surface of the supports, and a testing mechanism is set below the top plate. The testing mechanism includes a fixing unit and a bubble detection unit. The fixing unit includes a detection plate, a leakage hole, a cylinder, a fixing block, an electric push rod, and a clamping ring. This fixture, through the cooperation of the fixing unit and the bubble detection unit, can achieve airtightness testing of the gearbox housing. The fixing unit ensures the stability of the housing during the testing process, while the bubble detection unit determines the airtightness of the housing by detecting whether bubbles are generated, thus improving the reliability and efficiency of the testing to a certain extent.

[0004] However, the aforementioned existing airtightness testing fixtures suffer from poor sealing performance when fixing the gearbox housing to be tested. During the testing process, due to the inadequate seal, outside air can easily enter the testing area, or the gas leakage path within the housing may be unclear, making it difficult to accurately determine whether there is a gas leak. This severely affects the testing accuracy and fails to provide reliable assurance regarding the quality of the gearbox. Therefore, developing a gearbox housing airtightness testing fixture with better sealing performance is of significant practical importance. Utility Model Content

[0005] The purpose of this invention is to provide a tooling for testing the airtightness of a reducer housing. It employs a multi-seal structure consisting of a Y-shaped sealing ring and a stepped sealing ring, simultaneously sealing from both the inner and outer sides, greatly improving the sealing effect on the reducer housing, effectively preventing gas leakage during testing, and ensuring testing accuracy. An electric push rod drives an L-shaped sliding pressure rod in conjunction with a return spring, which can firmly press the housing, preventing shaking from affecting the results. An electric cylinder allows for convenient insertion of the housing into the testing water tank, and airtightness can be quickly determined by observing bubbles. The operation is simple and efficient.

[0006] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0007] A tooling for testing the airtightness of a speed reducer housing, comprising:

[0008] The testing platform has a gantry frame fixedly connected to its top. A testing component for fixing the housing of the reducer to be tested is installed on the gantry frame. A testing water tank for testing the air tightness of the reducer housing is installed on the top of the testing platform and at the position corresponding to the testing component.

[0009] The aforementioned gearbox housing airtightness testing fixture includes a testing component comprising a placement component for placing the gearbox housing to be tested, a plurality of fixing components for fixing the gearbox housing to be tested are provided at the top edge of the placement component, and the testing component further includes a driving component for driving the placement component to lift and lower.

[0010] The aforementioned gearbox housing airtightness testing fixture includes a placement assembly comprising a placement platform for placing the gearbox housing to be tested, the top of the placement platform having an annular placement groove, and a sealing element being provided inside the annular placement groove.

[0011] The aforementioned gearbox housing airtightness testing fixture includes a Y-shaped sealing ring, the top of which has a sealing groove that matches the gearbox housing to be tested.

[0012] The aforementioned gearbox housing airtightness testing fixture has stepped sealing rings on both sides of the inner wall of the sealing groove.

[0013] The aforementioned gearbox housing airtightness testing fixture includes a fixing component comprising a mounting cylinder fixedly connected to the top of the placement platform, wherein an L-shaped sliding pressure rod for pressing and fixing the gearbox housing to be tested is slidably connected to the inner wall of the mounting cylinder.

[0014] The aforementioned gearbox housing airtightness testing fixture includes a return spring fixedly connected to the bottom of the inner wall of the mounting cylinder, and the other end of the return spring is fixedly connected to the L-shaped sliding pressure rod.

[0015] The aforementioned gearbox housing airtightness testing fixture includes a drive assembly comprising an electric cylinder fixedly connected to the gantry frame, a drive frame fixedly connected to the output end of the electric cylinder, a connecting frame fixedly connected to the bottom of the drive frame, and the connecting frame being fixedly connected to the placement platform on the side near the placement platform.

[0016] The aforementioned gearbox housing airtightness testing fixture includes a drive assembly that further comprises an electric push rod fixedly connected to the connecting frame, and a pressure plate for pressing the L-shaped sliding pressure rod is fixedly connected to the output end of the electric push rod.

[0017] This utility model has at least the following beneficial effects:

[0018] 1. This utility model provides a tooling for testing the airtightness of a reducer housing. It employs a multi-seal structure consisting of a Y-shaped sealing ring and a stepped sealing ring, simultaneously sealing from both the inner and outer sides. This significantly improves the sealing effect on the reducer housing, effectively preventing gas leakage during testing and ensuring testing accuracy. An electric push rod drives an L-shaped sliding pressure rod in conjunction with a return spring, which securely presses the housing, preventing shaking from affecting the results. An electric cylinder allows for easy insertion of the housing into the testing water tank, enabling rapid determination of airtightness by observing air bubbles. The operation is simple and efficient.

[0019] 2. Excellent Sealing Effect: This invention places the reducer housing to be tested into the annular placement groove at the top of the placement platform, so that the bottom of the reducer housing abuts against the sealing groove. A Y-shaped sealing ring achieves initial sealing of the bottom of the reducer housing. Simultaneously, stepped sealing rings are provided on both sides of the inner wall of the sealing groove, enabling simultaneous sealing from both the inner and outer sides of the reducer housing. This multi-layered sealing structure greatly enhances the sealing effect on the reducer housing, effectively preventing gas leakage during testing and providing a reliable guarantee for accurate airtightness testing. It solves the problem of poor sealing affecting testing accuracy in existing technologies.

[0020] 3. Stable Fixing Method: Opening the electric push rod moves the pressure plate downwards, pressing against the top of the L-shaped sliding pressure rod, which in turn moves the L-shaped sliding pressure rod downwards. Multiple L-shaped sliding pressure rods then press and fix the reducer housing from the top. Simultaneously, a return spring located at the bottom of the inner wall of the mounting cylinder provides cushioning and stabilization during the pressing process, ensuring the reducer housing is firmly fixed during testing and preventing shaking from affecting the test results, further improving the accuracy and reliability of the test.

[0021] 4. Convenient testing operation: After the reducer housing is installed, the placement platform is lowered by an electric cylinder, allowing the sealed reducer housing to be easily inserted into the testing water tank. Operators only need to observe whether air bubbles are generated in the testing water tank to quickly and intuitively determine the airtightness of the reducer housing. The operation is simple and convenient, greatly improving testing efficiency and reducing testing costs. Attached Figure Description

[0022] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0023] Figure 1 This is a schematic diagram of the structure of the gearbox housing airtightness testing fixture of this utility model;

[0024] Figure 2 This is a schematic diagram of the testing components in the gearbox housing airtightness testing fixture of this utility model;

[0025] Figure 3 This is a schematic diagram of the components placed in the gearbox housing airtightness testing fixture of this utility model;

[0026] Figure 4 This is a cross-sectional structural diagram of the components placed in the gearbox housing airtightness testing fixture of this utility model;

[0027] Figure 5 This is a cross-sectional structural diagram of the sealing element in the gearbox housing airtightness testing fixture of this utility model;

[0028] Figure 6 This is a cross-sectional structural diagram of the fixing component in the gearbox housing airtightness testing fixture of this utility model;

[0029] Figure 7 This is a schematic diagram of the drive assembly in the gearbox housing airtightness testing fixture of this utility model.

[0030] Explanation of icon numbers:

[0031] 1. Testing table; 2. Gantry frame; 3. Testing components; 4. Testing water tank;

[0032] 301. Placement component; 302. Fixing component; 303. Driving component;

[0033] 3011, Placement platform; 3012, Annular placement groove; 3013, Seal;

[0034] 30131, Y-type sealing ring; 30132, sealing groove; 30133, stepped sealing ring;

[0035] 3021. Mounting cylinder; 3022. L-shaped sliding pressure rod; 3023. Return spring;

[0036] 3031, Electric cylinder; 3032, Drive frame; 3033, Connecting frame;

[0037] 3034. Electric push rod; 3035. Pressure plate. Detailed Implementation

[0038] The following will describe in detail the implementation of this application with reference to the accompanying drawings and embodiments, so that the implementation process of how this application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0039] Please refer to Figures 1 to 7As shown, an embodiment of the present invention provides a gearbox housing air tightness testing fixture, including: a testing platform 1, a gantry frame 2 fixedly connected to the top of the testing platform 1, a testing component 3 for fixing the gearbox housing to be tested installed on the gantry frame 2, and a testing water tank 4 for testing the air tightness of the gearbox housing to be tested installed on the top of the testing platform 1 and at the position corresponding to the testing component 3.

[0040] By adopting the above technical solution, the testing platform 1 is set as the main support of the entire tooling, providing a stable installation foundation for other components; the gantry 2 is fixed on the top of the testing platform 1, providing a reasonable installation position for the testing component 3 and ensuring that the testing component 3 can operate stably; the testing water tank 4 is set corresponding to the testing component 3, which facilitates the subsequent airtightness testing of the fixed reducer housing. The overall structure is reasonable, laying the foundation for efficient and accurate testing work.

[0041] To achieve flexible placement, fixation, and testing position adjustment of the reducer housing under test, in this embodiment: the placement component 301 is responsible for placing the reducer housing, providing a basic platform for subsequent fixing and testing operations; the fixing component 302 is located at the top edge of the placement component 301, which can effectively fix the placed reducer housing and prevent it from moving during the testing process; the driving component 303 can drive the placement component 301 to lift and lower, so that the fixed reducer housing can be accurately placed into the testing water tank 4 for airtightness testing. All components work together to ensure the smooth progress of the testing process.

[0042] In order to provide a suitable placement space for the gearbox housing to be tested and ensure a sealed foundation, in this embodiment: the placement assembly 301 includes a placement platform 3011 for placing the gearbox housing to be tested, the top of the placement platform 3011 is provided with an annular placement groove 3012, and a sealing element 3013 is provided inside the annular placement groove 3012.

[0043] To enhance the sealing effect on the bottom of the reducer housing and prevent gas leakage during testing, in this embodiment, the sealing element 3013 includes a Y-shaped sealing ring 30131. The top of the Y-shaped sealing ring 30131 has a sealing groove 30132 that matches the reducer housing under test. Stepped sealing rings 30133 are provided on both sides of the inner wall of the sealing groove 30132. The unique shape of the Y-shaped sealing ring 30131 allows for a better fit to the bottom of the reducer housing. The matching of the sealing groove 30132 with the bottom of the housing further enhances the sealing performance. The stepped sealing rings 30133 on both sides can simultaneously seal the bottom of the housing from both the inside and outside. This multi-layered sealing structure greatly improves the reliability of the seal, effectively preventing gas leakage during testing and ensuring the accuracy of the test results.

[0044] To securely clamp and fix the placed gearbox housing to be tested from the top, in this embodiment: the fixing assembly 302 includes a mounting cylinder 3021 fixedly connected to the top of the placement platform 3011. An L-shaped sliding pressure rod 3022 for clamping and fixing the gearbox housing to be tested is slidably connected to the inner wall of the mounting cylinder 3021. The mounting cylinder 3021 provides installation and sliding space for the L-shaped sliding pressure rod 3022, which can slide within the mounting cylinder 3021. Through its unique L-shaped structure, pressure can be applied to the gearbox housing from the top, achieving a secure clamping and fixing, and preventing the housing from shaking during the testing process and affecting the test results.

[0045] To ensure smoother operation of the L-shaped sliding pressure rod 3022 during tightening and loosening, and to improve the stability and reliability of the fixation, in this embodiment, a return spring 3023 is fixedly connected to the bottom of the inner wall of the mounting cylinder 3021, and the other end of the return spring 3023 is fixedly connected to the L-shaped sliding pressure rod 3022. When the L-shaped sliding pressure rod 3022 moves down to tighten the reducer housing, the return spring 3023 acts as a buffer, preventing excessive impact on the housing. When the housing needs to be loosened, the elastic force of the return spring 3023 allows the L-shaped sliding pressure rod 3022 to quickly return to its original position, ensuring a smooth and stable fixing and loosening process, further improving the stability and reliability of the fixation.

[0046] To achieve stable lifting and lowering of the placement assembly 301, thereby accurately delivering the fixed reducer housing into the testing water tank 4 for testing, in this embodiment: the drive assembly 303 includes an electric cylinder 3031 fixedly connected to the gantry 2. A drive frame 3032 is fixedly connected to the output end of the electric cylinder 3031, and a connecting frame 3033 is fixedly connected to the bottom of the drive frame 3032. The side of the connecting frame 3033 closest to the placement platform 3011 is fixedly connected to the placement platform 3011. The electric cylinder 3031, as a power source, can provide stable and precise driving force; the drive frame 3032 transmits the power of the electric cylinder 3031 to the connecting frame 3033; the connecting frame 3033 is fixedly connected to the placement platform 3011, thereby driving the placement assembly 301 to lift and lower as a whole, ensuring that the fixed reducer housing can accurately and smoothly enter the testing water tank 4, creating favorable conditions for airtightness testing.

[0047] To drive the L-shaped sliding pressure rod 3022 downwards and achieve the clamping and fixing operation of the reducer housing, in this embodiment, the drive assembly 303 further includes an electric push rod 3034 fixedly connected to the connecting frame 3033. A pressure plate 3035 for pressing the L-shaped sliding pressure rod 3022 is fixedly connected to the output end of the electric push rod 3034. The electric push rod 3034 provides precise linear motion, and through the pressure plate 3035 connected to its output end, it can accurately apply pressure to the top of the L-shaped sliding pressure rod 3022, causing the L-shaped sliding pressure rod 3022 to move downwards, thereby achieving the clamping and fixing of the reducer housing. This operation is convenient and precise, ensuring the fixing effect.

[0048] The working principle of this utility model is as follows:

[0049] First, the reducer housing to be tested is placed stably in the annular placement groove 3012 on the top of the placement platform 3011, ensuring that the bottom of the reducer housing is precisely abutting the sealing groove 30132. At this time, the Y-type sealing ring 30131 and the stepped sealing ring 30133 work together to form a tight multi-layer seal from the bottom and inner and outer sides of the reducer housing, effectively preventing gas leakage during the testing process. Next, the electric push rod 3034 is activated, and its output end drives the pressure plate 3035 to move downward. The pressure plate 3035 applies pressure to the top of the L-shaped sliding pressure rod 3022, causing the L-shaped sliding pressure rod 3022 to slide downward in the mounting cylinder 3021. Thus, the multiple L-shaped sliding pressure rods 3022 uniformly and firmly press and fix the reducer housing from the top. At the same time, the return spring 3023 plays a buffering role during the pressing process, ensuring smooth pressing action. After the reducer housing is installed and fixed, the electric cylinder 3031 is activated. The output end of the electric cylinder 3031 drives the placement platform 3011 downward through the drive frame 3032 and the connecting frame 3033, thereby smoothly extending the sealed reducer housing into the testing water tank 4. At this time, observe whether air bubbles are generated in the testing water tank 4. If air bubbles are present, it indicates that the airtightness of the reducer housing is poor; if no air bubbles are present, it indicates that its airtightness is good. The entire testing process is simple, accurate, and efficient, providing a reliable basis for the quality inspection of the reducer housing.

[0050] The foregoing description illustrates and describes several preferred embodiments of the present invention. However, as previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described herein through the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A speed reducer shell airtightness detection tool, comprising a detection table (1), characterized in that, The top of the testing platform (1) is fixedly connected to a gantry frame (2), and a testing component (3) for fixing the housing of the reducer to be tested is installed on the gantry frame (2). A testing water tank (4) for testing the air tightness of the housing of the reducer to be tested is installed on the top of the testing platform (1) and at the position corresponding to the testing component (3).

2. The gearbox housing airtightness testing fixture according to claim 1, characterized in that: The detection component (3) includes a placement component (301) for placing the gearbox housing to be tested. Several fixing components (302) for fixing the gearbox housing to be tested are provided at the top edge of the placement component (301). The detection component (3) also includes a drive component (303) for driving the placement component (301) to rise and fall.

3. The gearbox housing airtightness testing fixture according to claim 2, characterized in that: The placement assembly (301) includes a placement platform (3011) for placing the gearbox housing to be tested. The top of the placement platform (3011) is provided with an annular placement groove (3012), and a sealing element (3013) is provided inside the annular placement groove (3012).

4. The gearbox housing airtightness testing fixture according to claim 3, characterized in that: The sealing element (3013) includes a Y-shaped sealing ring (30131), and the top of the Y-shaped sealing ring (30131) is provided with a sealing groove (30132) that matches the housing of the reducer to be tested.

5. The gearbox housing airtightness testing fixture according to claim 4, characterized in that: Both sides of the inner wall of the sealing groove (30132) are provided with stepped sealing rings (30133).

6. The gearbox housing airtightness testing fixture according to claim 5, characterized in that: The fixing component (302) includes a mounting cylinder (3021) fixedly connected to the top of the placement platform (3011), and an L-shaped sliding pressure rod (3022) for pressing and fixing the housing of the reducer to be tested is slidably connected to the inner wall of the mounting cylinder (3021).

7. The gearbox housing airtightness testing fixture according to claim 6, characterized in that: A return spring (3023) is fixedly connected to the bottom of the inner wall of the mounting cylinder (3021), and the other end of the return spring (3023) is fixedly connected to the L-shaped sliding pressure rod (3022).

8. The gearbox housing airtightness testing fixture according to claim 7, characterized in that: The drive assembly (303) includes an electric cylinder (3031) fixedly connected to the gantry (2), a drive frame (3032) fixedly connected to the output end of the electric cylinder (3031), a connecting frame (3033) fixedly connected to the bottom of the drive frame (3032), and the connecting frame (3033) is fixedly connected to the placement platform (3011) on the side near the placement platform (3011).

9. The gearbox housing airtightness testing fixture according to claim 8, characterized in that: The drive assembly (303) also includes an electric push rod (3034) fixedly connected to the connecting frame (3033), and a pressure plate (3035) for pressing the L-shaped sliding pressure rod (3022) is fixedly connected to the output end of the electric push rod (3034).

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