A quick-change breather plug for use in drive axles

Abstract

This invention discloses a quick-change vent plug for drive axles, relating to the technical field of quick-change vent plugs for drive axles. The quick-change vent plug for drive axles includes a vent plug body disposed on the drive axle body, with a vent pipe disposed on the vent plug body. A mounting base for assisting in the installation of the vent plug body is fixed on the drive axle body. During use, the vent plug connected to the vent pipe engages with the mounting base via a threaded connection. A control component assists in the automatic release of high pressure within the drive axle, facilitating safe and stable use. During use, the quick-release installation component, pushing component, and squeezing component work together to evenly squeeze the outside of the vent pipe, ensuring effective installation and assisting in the subsequent ejection of the vent pipe from the annular mounting cavity for rapid disassembly.

Description

Technical Field

[0001] This invention relates to the field of quick-change breather plug technology for drive axles, specifically a quick-change breather plug applied to drive axles. Background Technology

[0002] The interior of a car drive axle is a sealed space containing a certain amount of lubricating oil to ensure the normal operation of rotating components such as gears and bearings. During vehicle operation, the high-speed rotation of gears and bearings generates heat, causing the temperature and pressure in the sealed space to rise. If the pressure is not released in time, gear oil leakage will occur. A vent plug is usually installed on the axle housing. The function of the vent plug is to connect the interior of the drive axle with the outside, maintain the same air pressure inside and outside the drive axle, and at the same time, prevent external mud, water, sand and gravel from entering the cavity and causing lubricating oil contamination and deterioration.

[0003] Because the high-speed rotation of gears inside the axle housing causes the oil temperature to rise, the resulting oil vapor will condense at the vent pipe, causing oil leakage. Therefore, it is necessary to regularly maintain and replace the vent pipe and clean the vent plug. The existing vent pipe and vent plug are connected by an interference fit and are locked together by a clamp. The fixing method is relatively cumbersome, and the clamp locking process will cause uneven tightness around the lock, affecting the installation and replacement of the vent pipe. To address this, we propose a quick-change vent plug for use in drive axles. Summary of the Invention

[0004] The purpose of this invention is to provide a quick-change vent plug for use in drive axles to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a quick-change vent plug for a drive axle, comprising a vent plug body disposed on the drive axle body, a vent pipe disposed on the vent plug body, and a mounting seat fixed on the drive axle body for assisting in the installation of the vent plug body, wherein the vent plug body and the mounting seat are detachably installed by means of threads; further comprising a control component for vent control disposed on the vent plug body, wherein the vent plug body is provided with an adjustment component for vent control adjustment and a guide component for guiding during the adjustment process, and a connecting pipe fixedly connected to one side of the vent plug body, wherein a quick-release installation component for quick-release installation of the vent pipe is disposed on the connecting pipe;

[0006] The quick-release installation assembly includes an installation sleeve fixed to the outside of the connecting pipe in a sleeved state. A shrink cylinder is fixed to one side of the installation sleeve. An annular installation cavity for inserting the end of the vent pipe is formed between the inner side of the shrink cylinder and the outer side of the connecting pipe. A pushing component for assisting the separation of the vent pipe after installation is provided inside the annular installation cavity. A conical surface is opened on the outer side of the shrink cylinder. Multiple sets of openings are opened on the shrink cylinder to assist in the shrink cylinder's contraction after being squeezed. A squeezing component for squeezing the shrink cylinder is provided on the outer side of the shrink cylinder.

[0007] Preferably, the extrusion assembly includes an extrusion cylinder sleeved on the outside of the shrink cylinder, the inside of the extrusion cylinder having a conical groove for pressing against the conical surface, the conical surface and the conical groove being matched and configured, and a transmission assembly for driving the extrusion cylinder being provided on the outside of the mounting sleeve.

[0008] Preferably, the transmission assembly includes a rotating cylinder sleeved on the outside of the mounting sleeve, the inner side of the rotating cylinder being threadedly connected to the outer side of the mounting sleeve, a drive ring for rotating the rotating cylinder being fixed on the rotating cylinder, and a connecting assembly for rotating the extrusion cylinder being provided between the drive ring and the end of the extrusion cylinder.

[0009] Preferably, the connecting assembly includes an annular groove formed at the end of the rotating cylinder, an annular block is rotatably connected inside the annular groove, the annular block is fixed to one end of the extrusion cylinder, the rotating cylinder, the annular groove, the annular block and the extrusion cylinder are concentrically arranged, and the cross sections of the annular groove and the annular block are T-shaped.

[0010] Preferably, the pushing components are provided in multiple sets, and the multiple sets of pushing components are arranged in a ring array inside the annular mounting cavity.

[0011] Preferably, the pushing component includes a round rod slidably connected to one end of the mounting sleeve. A first baffle and a second baffle are fixed at both ends of the round rod, respectively. The first baffle is located inside the annular mounting cavity. A pushing spring is sleeved on the outer side of the round rod. The two ends of the pushing spring are connected to the first baffle and the inner wall of the mounting sleeve, respectively. The round rod is provided with scale lines for identifying the distance the round rod slides on the mounting sleeve.

[0012] Preferably, the control component includes an operating chamber located inside the vent plug body, a communication hole between the operating chamber and the outside of the vent plug body, a conical cavity between the communication hole and the operating chamber, a ball for sealing the communication hole inside the conical cavity, and an elastic component for squeezing and pushing the ball inside the operating chamber.

[0013] Preferably, the elastic component includes a circular plate disposed inside the operating cavity, a first sleeve fixed on the circular plate, a first sliding rod slidably connected to the first sleeve, one end of the first sliding rod being fixed to a ball, a compression spring sleeved on the outside of the first sleeve, the two ends of the compression spring being respectively abutted against the circular plate and the ball, and multiple sets of circular holes being formed on the circular plate.

[0014] Preferably, the adjusting assembly includes a threaded tube rotatably connected to the upper end of the vent plug body, a threaded rod threadedly engaged with the threaded tube, one end of the threaded rod being fixed to the circular plate, and a drive pin for rotating the threaded tube being fixed to the other end of the threaded tube.

[0015] Preferably, the guide assembly includes two sets of second sleeves fixed inside the operating cavity. The two sets of second sleeves are symmetrically arranged on both sides of the threaded tube. A second slide rod is slidably connected to the second sleeve, and one end of the second slide rod is fixed to the circular plate.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] During use, the vent plug connected to the vent pipe of the present invention engages with the threaded mounting base. The control component assists in the automatic release of high pressure inside the drive axle, facilitating the safe and stable use of the drive axle. During the use of the vent plug, the cooperation of components such as the quick-release mounting component, the pushing component, and the squeezing component facilitates uniform squeezing of the outside of the vent pipe, ensuring the installation effect of the vent pipe and assisting the vent pipe to pop out from the annular mounting cavity, achieving the effect of quick disassembly. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall external structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the vent plug and vent tube structure of the present invention;

[0020] Figure 3 This is a schematic diagram of the control component and elastic component of the present invention;

[0021] Figure 4 This is a schematic diagram of the adjustment component and guide component of the present invention;

[0022] Figure 5 This is a schematic diagram of the extrusion assembly, transmission assembly, and connecting assembly of the present invention;

[0023] Figure 6 This is a schematic diagram of the quick-release installation component structure of the present invention;

[0024] Figure 7This is a schematic diagram of the pushing component structure of the present invention;

[0025] Figure 8 This is a schematic diagram showing the state of the vent pipe after it has been installed on the connecting pipe according to the present invention.

[0026] In the diagram: 101, vent plug body; 102, vent pipe; 103, drive axle body; 104, mounting base; 201, operating chamber; 202, connecting hole; 203, conical cavity; 204, sphere; 301, circular plate; 302, first sleeve; 303, first slide rod; 304, compression spring; 305, circular hole; 401, threaded pipe; 402, threaded rod; 403, drive pin; 501, second sleeve. 502, Second slide bar; 6, Connecting pipe; 701, Mounting sleeve; 702, Shrinking cylinder; 703, Conical surface; 704, Opening; 801, Extrusion cylinder; 802, Conical groove; 901, Rotating cylinder; 902, Drive ring; 1001, Annular groove; 1002, Annular block; 1101, Round rod; 1102, First baffle; 1103, Second baffle; 1104, Push spring; 1105, Scale line. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example

[0028] Please see Figures 1-8 The figure shows a quick-change vent plug for a drive axle, including a vent plug body 101 disposed on the drive axle body 103, a vent pipe 102 disposed on the vent plug body 101, and a mounting seat 104 fixed on the drive axle body 103 for assisting in the installation of the vent plug body 101. The vent plug body 101 and the mounting seat 104 are detachably installed by means of threads. It also includes a control component for vent control disposed on the vent plug body 101, an adjustment component for vent control adjustment and a guide component for guiding during the adjustment process disposed on the vent plug body 101, and a connecting pipe 6 fixedly connected to one side of the vent plug body 101. A quick-release installation component for quick-release installation of the vent pipe 102 is disposed on the connecting pipe 6.

[0029] The quick-release installation assembly includes an installation sleeve 701 fixed to the outside of the connecting pipe 6 in a sleeved state. A shrink cylinder 702 is fixed to one side of the installation sleeve 701. An annular installation cavity for inserting the end of the vent pipe 102 is formed between the inner side of the shrink cylinder 702 and the outer side of the connecting pipe 6. A pushing assembly for assisting the separation of the vent pipe 102 after installation is provided inside the annular installation cavity. A conical surface 703 is provided on the outer side of the shrink cylinder 702. Multiple sets of openings 704 are provided on the shrink cylinder 702 for assisting the shrink cylinder 702 to shrink after being squeezed. A squeezing assembly for squeezing the shrink cylinder 702 is provided on the outer side of the shrink cylinder 702.

[0030] It should be noted that during the use of the drive axle, the vent plug connected to the vent pipe 102 is threaded into the mounting base 104. The control component assists in the automatic release of high pressure inside the drive axle, which facilitates the safe and stable use of the drive axle. During the use of the vent plug, the cooperation of components such as the quick-release mounting component, the pushing component, and the squeezing component facilitates uniform squeezing of the outside of the vent pipe 102. This ensures the installation effect of the vent pipe 102 and assists in the subsequent ejection of the vent pipe 102 from the annular mounting cavity, achieving the effect of quick disassembly.

[0031] The extrusion assembly includes an extrusion cylinder 801 sleeved on the outside of the shrink cylinder 702. The extrusion cylinder 801 has a conical groove 802 inside for pressing against the conical surface 703. The conical surface 703 and the conical groove 802 are matched and arranged. A transmission assembly for driving the extrusion cylinder 801 is provided on the outside of the mounting sleeve 701.

[0032] It should be noted here that: through transmission, the extrusion cylinder 801 is driven to move synchronously. During the movement of the extrusion cylinder 801, the conical groove 802 of the extrusion cylinder 801 abuts against the conical surface 703 on the outer side of the shrinking cylinder 702. Through the abutting and extruding action and the opening of multiple sets of holes 704 on the shrinking cylinder 702, the inner hole of the shrinking cylinder 702 is subjected to force and shrinks evenly. During the shrinking process, the inner wall of the shrinking cylinder 702 abuts against the outer side of the vent pipe 102. Through the abutting and extruding action, the inserted vent pipe 102 is abutted and limited, thus completing the installation limitation of the vent pipe 102.

[0033] Preferably, the transmission assembly includes a rotating cylinder 901 sleeved on the outside of the mounting sleeve 701. The inner side of the rotating cylinder 901 is threadedly connected to the outer side of the mounting sleeve 701. A drive ring 902 for rotating the rotating cylinder 901 is fixed on the rotating cylinder 901. A connecting assembly for rotating the extrusion cylinder 801 is provided between the drive ring 902 and the end of the extrusion cylinder 801.

[0034] It should be noted that: the rotating cylinder 901 is driven to rotate by the drive ring 902. During the rotation of the rotating cylinder 901, the rotating cylinder 901 moves outside the mounting sleeve 701 through the mutual meshing transmission between the rotating cylinder 901 and the outer side of the mounting sleeve 701. During the movement of the rotating cylinder 901, the extrusion cylinder 801 is driven to move synchronously through the connection between the annular groove 1001 and the annular block 1002.

[0035] Preferably, the connecting assembly includes an annular groove 1001 formed at the end of the rotating cylinder 901, an annular block 1002 is rotatably connected inside the annular groove 1001, the annular block 1002 is fixed to one end of the extrusion cylinder 801, the rotating cylinder 901, the annular groove 1001, the annular block 1002 and the extrusion cylinder 801 are concentrically arranged, and the cross sections of the annular groove 1001 and the annular block 1002 are T-shaped.

[0036] It should be noted here that the annular groove 1001 and the annular block 1002 facilitate the rotatable connection between the extrusion cylinder 801 and the rotating cylinder 901.

[0037] Preferably, there are multiple sets of pushing components, and the multiple sets of pushing components are arranged in a ring array inside the annular mounting cavity;

[0038] It should be noted here that the pushing effect is ensured by using multiple sets of pushing components.

[0039] Preferably, the pushing component includes a round rod 1101 slidably connected to one end of the mounting sleeve 701. A first baffle 1102 and a second baffle 1103 are fixed at both ends of the round rod 1101, respectively. The first baffle 1102 is located inside the annular mounting cavity. A pushing spring 1104 is sleeved on the outer side of the round rod 1101. The two ends of the pushing spring 1104 are respectively connected to the first baffle 1102 and the inner wall of the mounting sleeve 701. A scale line 1105 is provided on the round rod 1101 for identifying the distance the round rod 1101 slides on the mounting sleeve 701.

[0040] It should be noted that during the installation of the vent pipe 102, the front end of the vent pipe 102 is inserted into the annular mounting cavity. During insertion, the front end of the vent pipe 102 abuts against the first baffle 1102 on each set of extrusion components. During this abutment, the round rod 1101 is pushed to slide outward. The distance the round rod 1101 slides outward is used to determine whether the depth of the vent pipe 102 inserted into the annular mounting cavity during connection is up to standard. When it is necessary to disassemble the vent pipe 102, the inner hole of the shrink cylinder 702 is no longer contracted through transmission. At this time, the elastic force of the spring 1104 on the first baffle 1102 and the abutment action of the first baffle 1102 on the end of the vent pipe 102 facilitate the ejection of the vent pipe 102 from the annular mounting cavity, achieving the effect of quick disassembly.

[0041] Preferably, the control component includes an operating cavity 201 opened inside the vent plug body 101, a connecting hole 202 provided between the operating cavity 201 and the outside of the vent plug body 101, a conical cavity 203 provided between the connecting hole 202 and the operating cavity 201, a ball 204 for blocking the connecting hole 202 provided inside the conical cavity 203, and an elastic component for squeezing and pushing the ball 204 provided inside the operating cavity 201;

[0042] It should be noted here that: due to the high-speed rotation of the drive axle gears and bearings generating heat, the temperature of the enclosed space rises. When the pressure inside the drive axle is greater than the squeezing force of the compression spring 304 on the ball 204, the pressure inside the drive axle pushes the ball 204 to no longer block the connecting hole 202. At this time, the high-pressure gas generated inside the drive axle can be discharged outward through the connecting hole 202, the operating chamber 201, the connecting pipe 6, and the vent pipe 102, assisting in the automatic release of high pressure inside the drive axle.

[0043] Preferably, the elastic component includes a circular plate 301 disposed inside the operating cavity 201, a first sleeve 302 fixed on the circular plate 301, a first slide rod 303 slidably connected on the first sleeve 302, one end of the first slide rod 303 being fixed to the ball 204, a compression spring 304 being sleeved on the outside of the first sleeve 302, the two ends of the compression spring 304 being respectively abutted against the circular plate 301 and the ball 204, and a plurality of circular holes 305 being formed on the circular plate 301;

[0044] It should be noted here that: the first sleeve 302 and the first slide rod 303 between the circular plate 301 and the ball 204 facilitate the telescopic connection between the ball 204 and the circular plate 301; the compression spring 304 facilitates the compression and pushing of the ball 204, so that the ball 204 abuts against and seals the connecting hole 202.

[0045] Preferably, the adjusting assembly includes a threaded tube 401 rotatably connected to the upper end of the vent plug body 101, a threaded rod 402 threadedly engaged with the threaded tube 401, one end of the threaded rod 402 being fixed to the circular plate 301, and a driving pin 403 for rotating the threaded tube 401 being fixed to the other end of the threaded tube 401; the guiding assembly includes two sets of second sleeves 501 fixed inside the operating cavity 201, the two sets of second sleeves 501 being symmetrically arranged on both sides of the threaded tube 401, and a second slide rod 502 slidably connected to the second sleeve 501, one end of the second slide rod 502 being fixed to the circular plate 301;

[0046] It should be noted that: the threaded tube 401 is driven to rotate by the drive pin 403. During the rotation of the threaded tube 401, the circular plate 301 is driven to move under force through the meshing transmission between the threaded tube 401 and the threaded rod 402. During the movement of the circular plate 301, the circular plate 301 moves up and down inside the operating chamber 201 of the vent plug body 101 through the sliding guide action of the second sleeve 501 and the second slide rod 502. During the movement of the circular plate 301, the circular plate 301 moves towards or away from the ball 204 that abuts against the connecting hole 202. During the movement, the compression amount of the compression spring 304 changes and the ball 204 is squeezed and pushed with different elastic forces, adjusting the abutting pressure between the ball 204 and the connecting hole 202. By adjusting the abutting pressure, the drive axle can automatically vent and release pressure at different pressure values ​​during the automatic pressure control process.

[0047] In this solution: a quick-change breather plug applied to a drive axle includes the following steps:

[0048] During use, the vent plug connected to the vent pipe 102 is installed on the drive axle through the threaded engagement with the mounting base 104, making the vent plug communicate with the interior of the drive axle. After the vent plug is installed, the high-speed rotation of the drive axle gears and bearings generates heat, and the temperature of the sealed space rises. When the pressure inside the drive axle is greater than the squeezing force of the compression spring 304 on the ball 204, the pressure inside the drive axle pushes the ball 204 to no longer block the connecting hole 202. At this time, the high-pressure gas generated inside the drive axle can be discharged outward through the connecting hole 202, the operating chamber 201, the connecting pipe 6, and the vent pipe 102, which assists in the automatic release of high pressure inside the drive axle, facilitating the safe and stable use of the drive axle.

[0049] During the automatic pressure relief control of the drive axle, the threaded tube 401 is driven to rotate via the drive pin 403. During the rotation of the threaded tube 401, the meshing transmission between the threaded tube 401 and the threaded rod 402 drives the circular plate 301 to move under force. During the movement of the circular plate 301, the sliding guide action of the second sleeve 501 and the second slide rod 502 causes the stressed circular plate 301 to move up and down within the operating chamber 201 of the vent plug body 101. During the process, the circular plate 301 moves towards or away from the ball 204 that is against the connecting hole 202. During the movement, the compression amount of the compression spring 304 changes and the ball 204 is squeezed and pushed with different elastic forces, adjusting the pressure between the ball 204 and the connecting hole 202. By adjusting the pressure, the drive axle can automatically vent and release pressure at different pressure values ​​during the automatic pressure relief control process, making the automatic pressure relief control of the drive axle using the vent plug more flexible and adjustable.

[0050] The use of this vent plug will cause oil vapor to condense at the vent pipe 102, resulting in oil leakage. Therefore, the vent pipe 102 needs to be maintained and replaced regularly, and the vent plug needs to be cleaned. During installation, the front end of the vent pipe 102 is inserted into the annular mounting cavity. During insertion, the front end of the vent pipe 102 abuts against the first baffle 1102 on each extrusion assembly. During this abutment, the round rod 1101 is pushed outward. The distance the round rod 1101 slides outward is used to determine the vent pipe. 102. During connection, is the insertion depth into the annular mounting cavity sufficient? After inserting one end of the vent pipe 102, the rotating cylinder 901 is driven to rotate via the drive ring 902. During the rotation of the rotating cylinder 901, the mutual meshing transmission between the rotating cylinder 901 and the outer side of the mounting sleeve 701 causes the rotating cylinder 901 to move outside the mounting sleeve 701. During the movement of the rotating cylinder 901, the connection between the annular groove 1001 and the annular block 1002 drives the extrusion cylinder 801 to move synchronously. During extrusion... During the movement of the cylinder 801, the conical groove 802 of the extrusion cylinder 801 abuts against the conical surface 703 on the outer side of the contraction cylinder 702. Through the abutting and extruding action and the opening of multiple sets of holes 704 on the contraction cylinder 702, the inner hole of the contraction cylinder 702 is subjected to force and contracts evenly. During the contraction process, the inner wall of the contraction cylinder 702 abuts against the outer side of the vent pipe 102. Through the abutting and extruding action, the inserted vent pipe 102 is abutted and limited, completing the installation limitation of the vent pipe 102. During the installation process, the uniform contraction of the inner hole of the shrinking cylinder 702 facilitates the uniform compression of the outer side of the vent pipe 102, ensuring the installation effect of the vent pipe 102. When it is necessary to disassemble the vent pipe 102, the inner hole of the shrinking cylinder 702 stops contracting through the transmission. At this time, the elastic force of the spring 1104 on the first baffle 1102 and the abutment of the first baffle 1102 on the end of the vent pipe 102 facilitate the ejection of the vent pipe 102 from the annular mounting cavity, achieving the effect of quick disassembly.

[0051] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0052] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A quick-change breather plug for use in a drive axle, comprising: A vent plug body (101) is provided on the drive axle body (103), and a vent pipe (102) is provided on the vent plug body (101). A mounting seat (104) for assisting the installation of the vent plug body (101) is fixed on the drive axle body (103). The vent plug body (101) and the mounting seat (104) are detachably installed by means of threads. Its characteristic is that it further includes: A control component for ventilation control is provided on the vent plug body (101). The vent plug body (101) is provided with an adjustment component for ventilation control adjustment and a guide component for guiding during the adjustment process. A connecting pipe (6) is fixedly connected to one side of the vent plug body (101). A quick-release installation component for quick-release installation of the vent pipe (102) is provided on the connecting pipe (6). The quick-release installation assembly includes an installation sleeve (701) fixed to the outside of the connecting pipe (6) in a sleeved state. A shrink cylinder (702) is fixed to one side of the installation sleeve (701). An annular installation cavity for inserting the end of the vent pipe (102) is formed between the inner side of the shrink cylinder (702) and the outer side of the connecting pipe (6). A pushing component for assisting the separation of the vent pipe (102) after installation is provided inside the annular installation cavity. A conical surface (703) is provided on the outer side of the shrink cylinder (702). Multiple sets of openings (704) are provided on the shrink cylinder (702) for assisting the shrink cylinder (702) to shrink after being squeezed. A squeezing component for squeezing the shrink cylinder (702) is provided on the outer side of the shrink cylinder (702). The control component includes an operating chamber (201) inside the vent plug body (101), a connecting hole (202) between the operating chamber (201) and the outside of the vent plug body (101), a conical cavity (203) between the connecting hole (202) and the operating chamber (201), a ball (204) for blocking the connecting hole (202) is provided inside the conical cavity (203), and an elastic component for squeezing and pushing the ball (204) is provided inside the operating chamber (201). The adjustment assembly includes a threaded tube (401) rotatably connected to the upper end of the vent plug body (101), a threaded rod (402) threadedly engaged with the threaded tube (401), one end of the threaded rod (402) being fixed to the circular plate (301), and a drive pin (403) for rotating the threaded tube (401) being fixed to the other end of the threaded tube (401). The guide assembly includes two sets of second sleeves (501) fixed inside the operating cavity (201). The two sets of second sleeves (501) are symmetrically arranged on both sides of the threaded tube (401). A second slide rod (502) is slidably connected to the second sleeve (501). One end of the second slide rod (502) is fixed to the circular plate (301).

2. The quick-change vent plug for a drive axle according to claim 1, characterized in that: The extrusion assembly includes an extrusion cylinder (801) sleeved on the outside of the shrink cylinder (702). The inside of the extrusion cylinder (801) is provided with a conical groove (802) for pressing against the conical surface (703). The conical surface (703) and the conical groove (802) are matched and arranged to match each other. The outside of the mounting sleeve (701) is provided with a transmission assembly for driving the extrusion cylinder (801).

3. A quick-change vent plug for a drive axle according to claim 2, characterized in that: The transmission assembly includes a rotating cylinder (901) sleeved on the outside of the mounting sleeve (701). The inner side of the rotating cylinder (901) is threadedly connected to the outer side of the mounting sleeve (701). A drive ring (902) for rotating the rotating cylinder (901) is fixed on the rotating cylinder (901). A connecting assembly for rotating the extrusion cylinder (801) is provided between the drive ring (902) and the end of the extrusion cylinder (801).

4. A quick-change vent plug for a drive axle according to claim 3, characterized in that: The connecting assembly includes an annular groove (1001) opened at the end of the rotating cylinder (901), and an annular block (1002) is rotatably connected inside the annular groove (1001). The annular block (1002) is fixed to one end of the extrusion cylinder (801). The rotating cylinder (901), the annular groove (1001), the annular block (1002) and the extrusion cylinder (801) are concentrically arranged, and the cross sections of the annular groove (1001) and the annular block (1002) are T-shaped.

5. A quick-change vent plug for a drive axle according to claim 1, characterized in that: The pushing components are provided in multiple sets, and the multiple sets of pushing components are arranged in a ring array inside the annular mounting cavity.

6. A quick-change vent plug for a drive axle according to claim 5, characterized in that: The pushing assembly includes a round rod (1101) slidably connected to one end of the mounting sleeve (701). A first baffle (1102) and a second baffle (1103) are fixed at both ends of the round rod (1101). The first baffle (1102) is located inside the annular mounting cavity. A pushing spring (1104) is sleeved on the outer side of the round rod (1101). The two ends of the pushing spring (1104) are connected to the first baffle (1102) and the inner wall of the mounting sleeve (701) respectively. A scale line (1105) is provided on the round rod (1101) for identifying the distance the round rod (1101) slides on the mounting sleeve (701).

7. A quick-change vent plug for a drive axle according to claim 6, characterized in that: The elastic component includes a circular plate (301) disposed inside the operating cavity (201). A first sleeve (302) is fixed on the circular plate (301). A first slide rod (303) is slidably connected on the first sleeve (302). One end of the first slide rod (303) is fixed to the ball (204). A compression spring (304) is sleeved on the outside of the first sleeve (302). The two ends of the compression spring (304) are respectively abutted against the circular plate (301) and the ball (204). Multiple sets of circular holes (305) are opened on the circular plate (301).

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