Composite coupling with diaphragm and bidirectional waterproof ventilation valve

Abstract

The utility model discloses a composite coupling with a diaphragm and a two-way waterproof ventilation valve, and belongs to the technical field of special vehicle chassis transmission systems. The flange plates at the two ends are connected with the power output end and the power input end of equipment respectively and connected with the connecting discs through the diaphragms, the connecting discs at the two ends are connected with the flange outer sleeve assemblies through bolts, and the flange outer sleeve assemblies at the two ends are connected with the spline sleeve assembly and the spline shaft assembly respectively. The sealing assembly is in clamp pressing fit with the flange jacket assemblies, the spline housing assembly and the spline shaft assembly, and waterproof ventilation valves are arranged in the flange jacket assemblies at the two ends. The spherical cage universal coupling integrates the structural characteristics of the spherical cage universal coupling, and has the advantages of large axial compensation, constant-speed transmission, large bearing capacity and the like; the flange plates at the two ends are connected with the connecting plate in a diaphragm connection mode, so that the ball cage universal coupling has good vibration reduction performance; after the waterproof ventilation valve is additionally arranged, liquid can be effectively prevented from entering the ball cage universal coupling, and meanwhile internal and external air pressure balance can be kept.

Description

Technical Field

[0001] This utility model relates to the technical field of special vehicle chassis transmission systems, specifically a composite coupling with a diaphragm and a two-way waterproof and breathable valve. Background Technology

[0002] Currently, most couplings used in the chassis transmission systems of special vehicles are either rigid or flexible. Rigid couplings are simple in structure, easy to manufacture, and low in cost, but they lack compensation capabilities and require strict alignment using a connecting mechanism. Flexible couplings are divided into those without elastic elements and those with elastic elements. Flexible couplings without elastic elements can compensate for the relative displacement of the two shafts due to their flexibility, but they cannot achieve buffering and vibration reduction because they lack elastic elements. Flexible couplings with elastic elements can not only compensate for the relative displacement between the two shafts but also have buffering and vibration reduction capabilities. However, the relative displacement compensation capability of this type of coupling is very small, and it lacks angular compensation capability. Due to their respective limitations, these two types of couplings cannot meet the power transmission requirements of heavy machinery under specific working conditions. Furthermore, the coupling used in the chassis transmission system of special vehicles is an important component of the chassis transmission system, which is responsible for transmitting power. However, in humid or underwater environments, the drive shaft still has problems such as liquid infiltration, air pressure imbalance and poor heat dissipation. Water or other liquids can easily enter the transmission system through gaps, causing internal parts to corrode or fail. Overly tight seals can lead to an imbalance of internal and external air pressure, affecting the normal operation of the drive shaft. Traditional sealing structures can also hinder the heat dissipation of the coupling, leading to overheating failure of the coupling. Summary of the Invention

[0003] To overcome the shortcomings of existing coupling structures, the purpose of this invention is to provide a composite coupling with a diaphragm and a two-way waterproof and breathable valve. While ensuring the angle and compensation capabilities, it can also improve the buffering performance of the ball cage coupling and effectively prevent liquid from entering in high humidity or underwater environments, while maintaining the internal and external air pressure balance of the coupling.

[0004] To achieve the above-mentioned objectives, this utility model discloses a composite coupling with a diaphragm and a bidirectional waterproof and breathable valve. The two flanges are connected to the power output end and the input end of the equipment, respectively. The two flanges are connected to the connecting plate through the diaphragm. The two connecting plates are connected to the flange outer sleeve assembly through bolts. The two flange outer sleeve assemblies are connected to the spline sleeve assembly and the spline shaft assembly, respectively. The sealing assembly is clamped to the flange outer sleeve assembly, the spline sleeve assembly, and the spline shaft assembly. The waterproof and breathable valve is installed inside the two flange outer sleeve assemblies.

[0005] Furthermore, the flange and the connecting plate are connected by a diaphragm. The edge area of ​​the diaphragm is evenly distributed with multiple screw holes, and it is directly locked to the connecting plate by multiple sets of screws. The central area of ​​the diaphragm is clamped between the pressure plate and the flange, and the diaphragm, pressure plate, and flange are connected by screws.

[0006] Furthermore, the waterproof and breathable valve consists of a cover, a breathable membrane, a valve body, a sealing gasket, an O-ring, and a retaining ring. The outer circumference of the cover is treated with adhesive, and the cover is press-fitted into the flange outer sleeve assembly, achieving axial positioning through an interference fit with the flange outer sleeve assembly. The valve body is installed inside the cover and is connected and positioned by threads. The retaining ring is press-fitted into the valve body and achieves axial positioning through a stepped hole in the valve body. A breathable membrane is fitted between the retaining ring and the valve body. A sealing gasket is provided between the cover and the valve body, and the sealing gasket is tightly attached to the outside of the O-ring at the end of the valve body.

[0007] Furthermore, the sealing gasket is made of VQM602 material; the breathable membrane is made of expanded polytetrafluoroethylene.

[0008] Furthermore, the valve body of the waterproof and breathable valve is provided with a groove.

[0009] Furthermore, the flange outer sleeve assembly, through the steel ball assembly, cooperates with the spline sleeve assembly and the spline shaft assembly to achieve power transmission; the flange outer sleeve assembly, the spline sleeve assembly, and the spline shaft assembly have multiple arc-shaped grooves evenly distributed along the circumference with an elliptical cross-section, and the cage fixes the steel ball assembly.

[0010] Compared with the prior art, this utility model has the following advantages:

[0011] This utility model integrates the structural features of ball cage universal couplings, and has advantages such as large axial compensation, constant speed transmission, and large load-bearing capacity.

[0012] The flanges at both ends and the connecting plate are connected by a diaphragm, which gives the ball cage universal coupling good vibration reduction performance.

[0013] 3. The connection between the flange and the ball cage assembly is stable and reliable, and can be quickly disassembled and replaced, making it easy to maintain.

[0014] 4. Adding a waterproof and breathable valve can effectively prevent liquid from entering the ball cage universal coupling, while also maintaining the balance of internal and external air pressure.

[0015] 5. The waterproof and breathable valve and the cover are connected by radial threads, which not only facilitates installation but also effectively ensures the installation accuracy of the waterproof and breathable valve. This makes the overall structure of the ball cage universal coupling stable and reliable. In addition, the waterproof and breathable valve is designed with disassembly and assembly grooves, which facilitates disassembly and assembly using professional tools. Attached Figure Description

[0016] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein:

[0017] Figure 1 This is a simplified structural diagram of the present invention.

[0018] Figure 2 yes Figure 1 A magnified view of a portion of the image.

[0019] Figure 3 yes Figure 1 A simplified schematic diagram of the connection structure between the middle flange and the connecting plate.

[0020] Figure 4 yes Figure 1 A simplified schematic diagram of the connection structure between the waterproof and breathable valve and the cap.

[0021] Figure 5 This is a partial side view of 4.

[0022] In the diagram: 1. Flange; 2. Pressure plate; 3. Diaphragm; 4. Connecting plate; 5. Flange outer sleeve assembly; 6. Sealing assembly; 7. Spline sleeve assembly; 8. Spline shaft assembly; 9. Sealing gasket; 10. Cover; 11. Waterproof and breathable valve; 12. Breathable membrane; 13. Valve body; 14. O-ring seal; 15. Retaining ring; 16. Steel ball assembly; 17. Groove; 18. Cage; 19. Air pressure balance channel. Detailed Implementation

[0023] To make the invention's objectives, technical solutions, and advantages clearer, the present invention will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the scope of protection of the present invention.

[0024] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5As shown, the two end flanges 1 of this utility model, which are composite couplings with diaphragms and bidirectional waterproof and breathable valves, are respectively connected to the power output end and the input end of the equipment; the two end connecting discs 4 are connected to the flange outer sleeve assembly 5 by bolts, and the two end flange outer sleeve assemblies 5 are respectively connected to the spline sleeve assembly 7 and the spline shaft assembly 8; the flange outer sleeve assembly 5, through the steel ball assembly 16, cooperates with the spline sleeve assembly 7 and the spline shaft assembly 8 to realize power transmission, and at the same time can realize the axial and angular compensation capability, power transmission capability and buffering capability required for the transmission of heavy machinery such as special vehicle chassis. The flange sleeve assembly 5, spline sleeve assembly 7, and spline shaft assembly 8 have multiple arc-shaped grooves evenly distributed along the circumference with an elliptical cross-section. The retainer 18 fixes the steel ball assembly 16. The flanges 1 at both ends and the connecting plate 4 are connected by diaphragms 3. Each diaphragm 3 is 1mm thick. Twenty-four screw holes are evenly distributed on the edge area of ​​the diaphragm 3. The diaphragm 3 is directly locked to the connecting plate 4 by twenty-four sets of screws. The central area of ​​the diaphragm 3 is precisely clamped between the pressure plate 2 and the flange 1. The diaphragm 3, pressure plate 2, and flange 1 are connected by screws.

[0025] The diaphragm 3 provides reliable and stable torque transmission to the coupling and provides a certain vibration damping capacity between the flange 1 and the ball cage assembly. During operation, the diaphragm 3 can reduce internal vibrations caused by axial movement, preventing damage to coupling components due to vibration and impact, and improving the service life of the coupling. The sealing assembly 6 is clamped together with the flange outer sleeve assembly 5, spline sleeve assembly 7, and spline shaft assembly 8, ensuring reliable sealing. This forms a reliable load-bearing body for the coupling and can withstand sufficient shear force, ensuring that the sealing cover will not deform and fail due to angle compensation during operation, thus ensuring reliable sealing. The flange outer sleeve assembly 5 at both ends is equipped with a waterproof and breathable valve 11.

[0026] The waterproof and breathable valve 11 consists of a cover 10, a breathable membrane 12, a valve body 13, a sealing gasket 9, an O-ring 14, and a retaining ring 15. The outer circumference of the cover 10 is press-fitted, and the cover 10 is press-fitted into the flange outer sleeve assembly 5, achieving axial positioning through an interference fit with the flange outer sleeve assembly 5. The valve body 13 is installed inside the cover 10 and connected and positioned via threads. This structure facilitates installation while effectively ensuring the installation accuracy of the waterproof and breathable valve 11, making the overall structure of the ball cage universal coupling stable and reliable. The retaining ring 15 is press-fitted into the flange outer sleeve assembly 5. The valve is installed inside the valve body 13 and is axially positioned through the stepped hole of the valve body 13. A breathable membrane 12 is fitted between the retaining ring 15 and the valve body 13. The breathable membrane 12 is made of expanded polytetrafluoroethylene. A sealing gasket 9 is provided between the cover 10 and the valve body 13. The sealing gasket 9 is tightly attached to the outside of the O-ring 14 at the end of the valve body 13 to enhance the sealing performance of the waterproof breathable valve 11. The sealing gasket 9 is made of VQM602 material. The waterproof breathable valve 11 is provided with a groove 17 to facilitate the disassembly and assembly of the waterproof breathable valve 11 using professional tools.

[0027] When the coupling is in a high humidity or underwater environment, the microporous structure of the breathable membrane 12 of the waterproof breathable valve 11 allows gas to pass through while preventing liquid penetration. The breathable membrane 12 is made of expanded polytetrafluoroethylene (EPTFE), a microporous polymer material produced through a special physical stretching process. The microporous structure formed by stretching has a pore size of about 0.1 to 10 micrometers. These pores are smaller than water molecules (the diameter of liquid water molecules is about 100 to 1000 micrometers) but larger than water vapor molecules (the diameter of gaseous water vapor molecules is about 0.0004 millimeters). Furthermore, this material itself has an extremely low surface area. It can (hydrophobic angle > 110°), where liquid water forms beads and rolls off its surface (similar to the lotus leaf effect), further preventing liquid water penetration but allowing gas to pass through; the waterproof and breathable valve 11 is fixed to the cover 10 by threaded installation and sealant to achieve waterproof function. The waterproof and breathable valve 11 uses an O-ring seal 14 and a sealing gasket 9 to enhance its waterproof performance; the O-ring seal 14 is made of elastic materials such as silicone and fluororubber, which has high resilience and aging resistance. The O-ring seal 14 is compressed between the valve body 13 and the sealing gasket 9 to form a tight contact, preventing water molecules from penetrating. When subjected to external water pressure, the O-ring 14 deforms under pressure, filling the microscopic gaps and forming a physical barrier. Even with tiny gaps, the elastic material can maintain a seal. The O-ring 14 itself is hydrophobic (contact angle > 90°), making it difficult for water droplets to wet the surface. Even with tiny gaps, its hydrophobic properties prevent liquid water from seeping in due to capillary action. The sealing gasket 9 is tightly pressed between the valve body 13 and the cover 10. It is made of VQM602 material, which uses a microporous membrane (pore size approximately 0.1–5 micrometers). This membrane is larger than water vapor molecules but much smaller than liquid water droplets, allowing gas to freely pass through the micropores while liquid... The body cannot be penetrated due to surface tension and hydrophobicity. The sealing gasket 9 has a central hole with a diameter of 3 mm, which can increase air permeability and is also part of the air pressure balance channel 19. The air pressure balance channel 19 of the waterproof vent valve 11 can be connected to the external environment through the waterproof vent valve 11 to ensure that the internal and external air pressures are consistent and to avoid equipment damage caused by air pressure difference. When the coupling is immersed in water, the waterproof vent valve 11 can prevent external water from entering the ball cage of the coupling. At the same time, it can discharge the high-pressure hot gas generated in the ball cage cavity when the ball cage coupling is running, reducing the impact of high-pressure hot gas on the normal operation of the ball cage coupling.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A composite coupling with a diaphragm and a bidirectional waterproof and air-permeable valve, characterized in that: The two flanges (1) are connected to the power output end and the input end of the equipment respectively. The two flanges (1) are connected to the connecting plate (4) through the diaphragm (3). The two connecting plates (4) are connected to the flange outer sleeve assembly (5) by bolts. The two flange outer sleeve assembly (5) is connected to the spline sleeve assembly (7) and the spline shaft assembly (8) respectively. The sealing assembly (6) is clamped to the flange outer sleeve assembly (5), the spline sleeve assembly (7), and the spline shaft assembly (8). The two flange outer sleeve assembly (5) is equipped with a waterproof and breathable valve (11).

2. The composite coupling with diaphragm and bidirectional waterproof and air-permeable valve according to claim 1, characterized in that: The flange (1) and the connecting plate (4) are connected by a diaphragm (3). Multiple screw holes are evenly distributed on the edge area of ​​the diaphragm (3), and it is directly locked to the connecting plate (4) by multiple sets of screws. The central area of ​​the diaphragm (3) is clamped between the pressure plate (2) and the flange (1). The diaphragm (3), the pressure plate (2) and the flange (1) are connected by screws.

3. The composite coupling with diaphragm and bidirectional waterproof and air-permeable valve according to claim 1, characterized in that: The waterproof and breathable valve (11) consists of a cover (10), a breathable membrane (12), a valve body (13), a sealing gasket (9), an O-ring seal (14), and a retaining ring (15). The outer circle of the cover (10) is treated with adhesive, and the cover (10) is pressed into the flange outer sleeve assembly (5) and axially positioned by interference fit with the flange outer sleeve assembly (5). The valve body (13) is installed in the cover (10) and connected and positioned by threads. The retaining ring (15) is pressed into the valve body (13) and axially positioned by the stepped hole of the valve body (13). A breathable membrane (12) is fitted between the retaining ring (15) and the valve body (13). A sealing gasket (9) is provided between the cover (10) and the valve body (13), and the sealing gasket (9) is tightly attached to the outside of the O-ring seal (14) at the end of the valve body (13).

4. The composite coupling with diaphragm and bidirectional waterproof and air-permeable valve according to claim 3, characterized in that: The sealing gasket (9) is made of VQM602 material; the breathable membrane (12) is made of expanded polytetrafluoroethylene.

5. The composite coupling with diaphragm and bidirectional waterproof and air-permeable valve according to claim 1, characterized in that: The waterproof and breathable valve (11) has a groove (17) on its valve body (13).

6. The composite coupling with diaphragm and bidirectional waterproof and air-permeable valve according to claim 1, characterized in that: The flange outer sleeve assembly (5) is connected to the spline sleeve assembly (7) and the spline shaft assembly (8) respectively via the steel ball assembly (16) to achieve power transmission; the flange outer sleeve assembly (5), the spline sleeve assembly (7), and the spline shaft assembly (8) have multiple arc-shaped grooves evenly distributed along the circumference and with an elliptical cross section, and the cage (18) fixes the steel ball assembly (16).

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