A dustproof and waterproof sealing end cover for a transfer case housing

Abstract

The utility model relates to mechanical sealing device technical field discloses a dustproof waterproof sealing end cover of transfer case shell, including seal cover, the connecting block is fixedly connected with the seal cover outer wall, the screw is slidably connected with the connecting block inner wall, the seal cover top oil hole is slidably connected with the sealing plug, the sealing plug top fixedly connected with the plug -in block and the pull ring, the plug -in block inner wall fixedly connected with the shell, the spring and the chuck are slidably connected in the shell, the oil hole inner wall is provided with the clamping groove, the seal cover bottom fixedly connected with conical protection ring no.

Description

Technical Field

[0001] This utility model relates to the technical field of mechanical sealing devices, and in particular to a dustproof and waterproof sealing end cap for a transfer case housing. Background Technology

[0002] As a core component of the automotive powertrain system, the transfer case's internal precision gears and bearings require operation in a clean lubricating oil environment. The transfer case end cap is used to seal the transfer case opening and block external contaminants. Existing transfer case end caps mainly use bolts to press the end cap body and flat sealing gasket onto the housing surface. The flat sealing gasket only relies on unidirectional pressure to generate deformation. The flat sealing gasket cannot adaptively fill the micro-unevenness of the housing surface. The lack of a multi-layer compression protection mechanism allows fine dust and moisture from the outside to penetrate into the transfer case, thereby affecting the operational stability of the internal mechanical components.

[0003] Meanwhile, the existing transfer case housing end cover has the problem of inconvenience in operation when performing oil filling maintenance. The oil filling hole is generally sealed by tightening a threaded metal plug. When performing oil filling tasks, operators must carry special disassembly and assembly tools to loosen and remove the metal plug by rotating it. After oil filling, the tool must be used to tighten it again. This tool-dependent threaded connection structure limits the flexibility of maintenance work and makes it impossible to open the oil filling hole in time in emergency situations where tools are not available.

[0004] Therefore, this utility model proposes a dustproof and waterproof sealing end cap for the transfer case housing to overcome the shortcomings of the prior art. Utility Model Content

[0005] In view of the problems in the prior art, the transfer case housing end cover relies solely on a flat seal, resulting in insufficient dust and water resistance, and the use of threaded plugs for the oil filling hole makes it impossible to quickly disassemble and fill oil without tools. This utility model aims to provide a transfer case housing dust and water-resistant sealing end cover with an improved structure that can effectively solve the above problems.

[0006] This utility model provides a dustproof and waterproof sealing end cover for a transfer case housing, including a sealing cover, connecting blocks fixedly connected at equal intervals to the outer wall of the sealing cover, screws slidably connected to the inner wall of the connecting blocks, and a plug-in mechanism for quickly opening and closing the oil injection hole and a sealing mechanism for enhancing the bottom sealing performance.

[0007] The sealing cap has an oil injection hole at the top, a sealing plug is slidably connected to the inner wall of the oil injection hole, an insert block is fixedly connected to the top of the sealing plug, a pull ring is fixedly connected to the top of the insert block, an insertion and removal mechanism is located inside the insert block, an outer shell is fixedly connected to the inner wall of the insert block, a spring is slidably connected to the inner wall of the outer shell, a clamp is fixedly connected to the end of the spring, a groove is provided on the inner wall of the oil injection hole, and the clamp engages in the groove. The sealing mechanism is located at the bottom of the sealing cap, a conical protective ring is fixedly connected to the bottom of the outer wall of the sealing cap, a compression sealing ring is fixedly connected to the bottom of the sealing cap, an outer compression ring is provided on the outer side of the top of the compression sealing ring, an inner compression ring is provided on the inner side of the top of the compression sealing ring, and the tops of both the outer and inner compression rings are fixedly connected to the bottom of the sealing cap. A filler ring is fixedly connected to the outer wall of the sealing plug, and a second conical protective ring is fixedly connected to the bottom of the outer wall of the insert block.

[0008] Preferably, the conical protective ring is made of rubber, and the cross-section of the conical protective ring is an inverted trapezoidal structure. The diameter of the upper surface of the conical protective ring is larger than the diameter of the bottom surface of the conical protective ring. The conical protective ring is used to press against the transfer case housing when the screw is tightened.

[0009] Preferably, the inner wall of the extrusion outer ring is in close contact with the outer wall of the extrusion sealing ring, the outer wall of the extrusion inner ring is in close contact with the inner wall of the extrusion sealing ring, and the height of the extrusion outer ring and the height of the extrusion inner ring are less than the height of the extrusion sealing ring in its natural state.

[0010] Preferably, the outer shell is radially distributed along the insert block, and the outer shell has a hollow cylindrical structure. The spring is located inside the outer shell and is always in a compressed state. The spring is used to provide the elastic force to push the chuck head outward.

[0011] Preferably, the end of the clip away from the spring has a hemispherical guide structure, and the shape of the inner wall of the clip groove is adapted to the shape of the outer wall of the clip. The clip is used to guide the clip to slide out of the clip groove when the pull ring is under force.

[0012] Preferably, the second conical protective ring is located at the connection between the insert block and the sealing plug. The maximum outer diameter of the second conical protective ring is larger than the diameter of the oil injection hole. The second conical protective ring is used to cover the top edge of the oil injection hole when the clip head is inserted into the clip groove.

[0013] Preferably, the filler rings are evenly distributed along the axial direction of the sealing plug. The filler rings are elastic rubber O-rings, and the outer diameter of the filler rings is larger than the inner diameter of the oil injection hole. The filler rings are used to fill the gap between the sealing plug and the oil injection hole.

[0014] Preferably, the pull ring has an inverted U-shaped structure, with both ends of the pull ring welded and fixed to the center symmetrical position on the upper surface of the insert block, and the surface of the pull ring is provided with anti-slip texture.

[0015] Preferably, the bottom surface of the extrusion sealing ring is provided with annular anti-slip protrusions, and the hardness of the extrusion outer ring and extrusion inner ring is greater than the hardness of the extrusion sealing ring material, so as to ensure that the extrusion sealing ring undergoes elastic deformation during the extrusion process.

[0016] This utility model has the following beneficial effects: 1. This utility model solves the problems of poor sealing performance and susceptibility to dust and moisture corrosion of the transfer case end cover in the prior art by setting a sealing mechanism composed of a conical protective ring, a compression sealing ring, a compression outer ring, and a compression inner ring. It achieves the effect of using the screw tightening force to make the conical protective ring fit tightly against the shell to form external protection, while using the compression inner and outer rings to compress the compression sealing ring in layers, causing the sealing ring to deform and fill the tiny gaps, thereby achieving double sealing protection and significantly improving the dustproof and waterproof capability of the transfer case shell.

[0017] 2. This utility model solves the problem of cumbersome disassembly of the oil filling port sealing method in the prior art, which often requires tools for oil filling and maintenance, by setting an insertion and removal mechanism including a pull ring, a plug, a spring and a clamp at the oil filling hole. It achieves the convenient operation effect of unlocking and removing the sealing plug by pulling the pull ring by hand without the need for external tools, and automatically locking and fixing it when inserted, which greatly improves the work efficiency of daily oil filling and maintenance of the transfer case. Attached Figure Description

[0018] Figure 1 This is a perspective view of a dustproof and waterproof sealing end cap for a transfer case housing proposed in this utility model; Figure 2 This is an exploded view of the sealing mechanism of a dustproof and waterproof sealing end cap for a transfer case housing proposed in this utility model; Figure 3 This is an exploded view of the insertion and removal mechanism of the dustproof and waterproof sealing end cap of the transfer case housing proposed in this utility model; Figure 4 This is a cross-sectional view of the outer shell of a transfer case housing dustproof and waterproof sealing end cap proposed in this utility model; Figure 5 This is a cross-sectional view of the sealing cover of a dustproof and waterproof sealing end cover for a transfer case housing proposed in this utility model.

[0019] Legend: 1. Sealing cap; 2. Insertion and removal mechanism; 21. Insert block; 22. Pull ring; 23. Outer shell; 24. Spring; 25. Clip; 26. Slot; 3. Sealing mechanism; 31. Conical protective ring one; 32. Compression sealing ring; 33. Compression outer ring; 34. Compression inner ring; 35. Conical protective ring two; 36. Filler ring; 4. Connecting block; 5. Screw; 6. Oil injection hole; 7. Sealing plug. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model.

[0021] Example: Please refer to Figures 1 to 5 This utility model provides a dustproof and waterproof sealing end cap for a transfer case housing, which aims to solve the problems of poor sealing effect of the transfer case end cap in the prior art, which easily leads to the intrusion of dust and water vapor, and the cumbersome and inconvenient disassembly of the oil filling port sealing method.

[0022] Please refer to Figure 1 and Figure 2 The transfer case housing dustproof and waterproof sealing end cover includes a sealing cover 1 and connecting blocks 4 that are equidistantly fixed around the outer wall of the sealing cover 1. Screws 5 are slidably connected to the inner wall of the connecting blocks 4. A through hole is opened in the inner wall of the connecting blocks 4. The screws 5 pass through the through hole and extend to the bottom of the sealing cover 1. By tightening the screws 5, the sealing cover 1 is fixedly installed on the surface of the transfer case housing, thereby covering and protecting the opening of the transfer case.

[0023] To further enhance the functionality and protective performance of the waterproof sealing end cap, the sealing cap 1 is equipped with an insertion and removal mechanism 2 and a sealing mechanism 3. An oil injection hole 6 is opened at the center of the top of the sealing cap 1. The oil injection hole 6 penetrates the body of the sealing cap 1. A sealing plug 7 is slidably connected to the inner wall of the oil injection hole 6. The sealing plug 7 is used to seal the oil injection hole 6. The insertion and removal mechanism 2, in conjunction with the sealing plug 7, enables the rapid opening and closing of the oil injection hole 6. At the same time, the sealing mechanism 3 is used to strengthen the connection and sealing between the sealing cap 1 and the transfer case housing.

[0024] Specifically, for convenient oil filling, the top of the sealing plug 7 is fixedly connected to an insert 21. The outer wall of the insert 21 slides against the inner wall of the oil filling hole 6. A pull ring 22 is fixedly connected to the top of the insert 21. The pull ring 22 has an inverted U-shaped structure, and its two ends are welded and fixed to the center symmetrical position on the upper surface of the insert 21. The surface of the pull ring 22 is provided with anti-slip texture to facilitate the operator to hold the pull ring 22 and apply pulling force. A shell 23 is fixedly connected to the inner wall of the insert 21. The shell 23 is radially distributed along the radial direction of the insert 21 and has a hollow cylindrical structure. The inner wall of the shell 23 is slidably connected to... Spring 24 is located inside the outer casing 23 and is always in a compressed state. A clamp 25 is fixedly connected to the end of spring 24. A groove 26 is opened on the inner wall of the oil filling hole 6. Under the elastic force of spring 24, clamp 25 is engaged in the groove 26. The end of clamp 25 away from spring 24 has a hemispherical guide structure. The inner wall shape of groove 26 is adapted to the outer wall shape of clamp 25, so that when oil needs to be filled, simply pull the pull ring 22 upward. The pulling force is converted into a horizontal component force through the arc surface of clamp 25 to compress spring 24, thereby disengaging clamp 25 from groove 26 and achieving tool-free quick disassembly.

[0025] Please refer to Figure 2 and Figure 5 The sealing mechanism 3 has a conical protective ring 31 fixedly connected to the bottom of the outer wall of the sealing cover 1, and a compression sealing ring 32 fixedly connected to the bottom of the sealing cover 1. The compression sealing ring 32 has a compression outer ring 33 on the outer side of its top and a compression inner ring 34 on the inner side of its top. The conical protective ring 31 is made of rubber and has an inverted trapezoidal cross-section. The diameter of the upper surface of the conical protective ring 31 is larger than the diameter of the bottom surface of the conical protective ring 31. The sealing mechanism 3 is arranged at the bottom and around the sealing cover 1. Through the conical surface design of the conical protective ring 31, it can be pressed tightly against the transfer case housing during the tightening of the screw 5, and the geometric deformation provides the first dustproof and waterproof barrier to the outside of the sealing cover 1.

[0026] The tops of the outer extrusion ring 33 and the inner extrusion ring 34 are fixedly connected to the bottom of the sealing cover 1. The inner wall of the outer extrusion ring 33 is tightly fitted to the outer wall of the sealing ring 32, and the outer wall of the inner extrusion ring 34 is tightly fitted to the inner wall of the sealing ring 32. The height of the outer extrusion ring 33 and the inner extrusion ring 34 is less than the height of the sealing ring 32 in its natural state. The hardness of the materials of the outer extrusion ring 33 and the inner extrusion ring 34 is greater than the hardness of the material of the sealing ring 32. The sealing ring 32 is subjected to downward extrusion force from the outer extrusion ring 33 and the inner extrusion ring 34, which ensures that the sealing ring 32 undergoes sufficient elastic deformation when compressed, forcing the bottom of the sealing ring 32 to fit tightly against the inner wall of the transfer case housing, thereby filling the tiny gap between the sealing cover 1 and the housing and achieving a high-strength internal seal.

[0027] To meet the sealing requirements of the oil filling hole 6, multiple filler rings 36 are fixedly connected to the outer wall of the sealing plug 7, and a conical protective ring 35 is fixedly connected to the bottom of the outer wall of the insert block 21. The filler rings 36 are evenly distributed along the axial direction of the sealing plug 7 and are elastic rubber O-rings. The outer diameter of the filler rings 36 is larger than the inner diameter of the oil filling hole 6. The conical protective ring 35 is located at the connection between the insert block 21 and the sealing plug 7 and its maximum outer diameter is larger than the diameter of the oil filling hole 6. When the sealing plug 7 is inserted into the oil filling hole 6, the multiple filler rings 36 are deformed by the pressure of the inner wall of the oil filling hole 6 and adaptively fill the gap. At the same time, the conical protective ring 35 presses the top edge of the oil filling hole 6. Through the synergistic effect of this series of sealing components, the interior of the transfer case housing is completely isolated from external dust and moisture.

[0028] As a preferred embodiment, in order to enhance the sealing fit of the bottom of the sealing cap 1 and prevent sealing failure, the conical protective ring 31 is made of rubber. The cross-section of the conical protective ring 31 is an inverted trapezoidal structure, and the diameter of the upper surface of the conical protective ring 31 is larger than the diameter of the bottom surface of the conical protective ring 31. The inner wall of the extrusion outer ring 33 is tightly fitted with the outer wall of the extrusion sealing ring 32, and the outer wall of the extrusion inner ring 34 is tightly fitted with the inner wall of the extrusion sealing ring 32. The height of the extrusion outer ring 33 and the height of the extrusion inner ring 34 are both less than the height of the extrusion sealing ring 32 in its natural state. The hardness of the materials of the extrusion outer ring 33 and the extrusion inner ring 34 is greater than the hardness of the materials of the extrusion sealing ring 32. The bottom surface of the extrusion sealing ring 32 is provided with annular anti-slip protrusions.

[0029] As another preferred embodiment, in order to ensure the smooth operation of the insertion and removal mechanism 2 and the reliability of locking, the outer shell 23 is radially distributed along the insertion block 21. The outer shell 23 is a hollow cylindrical structure. The spring 24 is located inside the outer shell 23 and is always in a compressed state to provide continuous thrust. The end of the latch 25 away from the spring 24 has a hemispherical guide structure. The inner wall shape of the latch 26 is adapted to the outer wall shape of the latch 25. The pull ring 22 has an inverted U-shaped structure. The two ends of the pull ring 22 are welded and fixed to the center symmetrical position on the upper surface of the insertion block 21, and the surface of the pull ring 22 is provided with anti-slip texture.

[0030] As a further preferred embodiment, in order to eliminate the tiny gap between the oil injection hole 6 and the sealing plug 7, a second conical protective ring 35 is located at the connection between the insert block 21 and the sealing plug 7. The maximum outer diameter of the second conical protective ring 35 is larger than the diameter of the oil injection hole 6. The filler rings 36 are evenly distributed along the axial direction of the sealing plug 7. The filler rings 36 are elastic rubber O-rings, and the outer diameter of the filler rings 36 is larger than the inner diameter of the oil injection hole 6.

[0031] Working principle: When installing the dustproof and waterproof sealing end cap of the transfer case housing, tightening the screws 5 on the inner wall of the connecting block 4 moves the sealing cover 1 toward the transfer case housing. The conical protective ring 31, due to its conical design with a larger upper diameter than the lower diameter, is subjected to gradually increasing extrusion force, making the conical protective ring 31 fit tightly against the surface of the transfer case housing. At the same time, the extrusion sealing ring 32 is subjected to downward extrusion force from the top extrusion outer ring 33 and extrusion inner ring 34. The extrusion outer ring 33 and extrusion inner ring 34 act on the outer and inner rings of the extrusion sealing ring 32, respectively. The layered extrusion of the extrusion outer ring 33 and extrusion inner ring 34 forces the extrusion sealing ring 32 to deform and makes the bottom fit tightly against the inner wall of the transfer case housing. Through the concerted action of the conical protective ring 31, the extrusion sealing ring 32, and the extrusion outer ring 33 and extrusion inner ring 34, dust and moisture are prevented from entering the interior of the transfer case housing. When it is necessary to add lubricating oil into the transfer case through the oil filling hole 6, pull the pull ring 22 outward. The pull ring 22 drives the insert block 21 and the sealing plug 7 to move axially along the oil filling hole 6. Under the action of the pulling force, the arc surface of the chuck 25 is compressed, causing the chuck 25 to retract into the housing 23 and overcome the elastic force of the spring 24, so that the chuck 25 disengages from the inner wall of the corresponding slot 26. Then, the insert block 21 and the sealing plug 7 slide upward along the inner wall of the oil filling hole 6, and the oil filling operation can be performed. When resealing is required after oil filling, insert 21 and sealing plug 7 are inserted along the inner wall of oil filling hole 6. After insertion, the clamp 25 automatically pops out under the elastic force of spring 24 and locks into the inner wall of the clamp groove 26 to lock the position of sealing plug 7. At this time, the conical protective ring 35 seals the top of the inner wall of oil filling hole 6 and fills the gap between insert 21 and oil filling hole 6. At the same time, the filling ring 36 on the outer wall of sealing plug 7 is deformed by the pressure of the inner wall of oil filling hole 6 and adaptively fills the gap, thereby ensuring the sealing performance of oil filling hole 6.

Claims

1. A dustproof and waterproof sealing end cap for a transfer case housing, comprising: A sealing cover (1) is fixedly connected to the outer wall of the sealing cover (1) at equal intervals, and a screw (5) is slidably connected to the inner wall of the connecting block (4). The sealing cover (1) is characterized by having an insertion / removal mechanism (2) and a sealing mechanism (3). An oil injection hole (6) is provided at the top of the sealing cover (1). A sealing plug (7) is slidably connected to the inner wall of the oil injection hole (6). A plug block (21) is fixedly connected to the top of the sealing plug (7). A pull ring (22) is fixedly connected to the top of the plug block (21). A housing (23) is fixedly connected to the inner wall of the plug block (21). A spring (24) is slidably connected to the inner wall of the housing (23). A clamp head (25) is fixedly connected to the end of the spring (24). A groove (26) is provided on the inner wall of the oil injection hole (6). The clamp head (25) engages with the groove (26). A conical protective ring (31) is fixedly connected to the bottom of the outer wall of the sealing cap (1). A compression sealing ring (32) is fixedly connected to the bottom of the sealing cap (1). A compression outer ring (33) is provided on the outer side of the top of the compression sealing ring (32). A compression inner ring (34) is provided on the inner side of the top of the compression sealing ring (32). A filling ring (36) is fixedly connected to the outer wall of the sealing plug (7). A conical protective ring (35) is fixedly connected to the bottom of the outer wall of the insert (21).

2. The dustproof and waterproof sealing end cover for a transfer case housing according to claim 1, characterized in that, The conical protective ring (31) is made of rubber. The cross-section of the conical protective ring (31) is an inverted trapezoidal structure, and the diameter of the upper surface of the conical protective ring (31) is greater than the diameter of the bottom surface of the conical protective ring (31).

3. The dustproof and waterproof sealing end cover for a transfer case housing according to claim 1, characterized in that, The inner wall of the extrusion outer ring (33) is in close contact with the outer wall of the extrusion sealing ring (32), the outer wall of the extrusion inner ring (34) is in close contact with the inner wall of the extrusion sealing ring (32), and the height of the extrusion outer ring (33) and the height of the extrusion inner ring (34) are less than the height of the extrusion sealing ring (32) in its natural state.

4. The dustproof and waterproof sealing end cover for a transfer case housing according to claim 1, characterized in that, The outer shell (23) is radially distributed along the insert (21). The outer shell (23) is a hollow cylindrical structure. The spring (24) is located inside the outer shell (23) and is always in a compressed state.

5. A dustproof and waterproof sealing end cover for a transfer case housing according to claim 1, characterized in that, The end of the card head (25) away from the spring (24) has a hemispherical guide structure, and the inner wall shape of the card slot (26) is adapted to the outer wall shape of the card head (25).

6. A dustproof and waterproof sealing end cap for a transfer case housing according to claim 1, characterized in that, The second conical protective ring (35) is located at the connection between the insert (21) and the sealing plug (7), and the maximum outer diameter of the second conical protective ring (35) is greater than the diameter of the oil injection hole (6).

7. A dustproof and waterproof sealing end cover for a transfer case housing according to claim 1, characterized in that, The filler rings (36) are evenly distributed along the axial direction of the sealing plug (7). The filler rings (36) are elastic rubber O-rings. The outer diameter of the filler rings (36) is larger than the inner diameter of the oil injection hole (6).

8. A dustproof and waterproof sealing end cap for a transfer case housing according to claim 1, characterized in that, The pull ring (22) has an inverted U-shaped structure. The two ends of the pull ring (22) are welded and fixed to the center symmetrical position on the upper surface of the insert block (21), and the surface of the pull ring (22) is provided with anti-slip texture.

9. A dustproof and waterproof sealing end cover for a transfer case housing according to claim 1, characterized in that, The bottom surface of the extrusion sealing ring (32) is provided with annular anti-slip protrusions, and the material hardness of the extrusion outer ring (33) and the extrusion inner ring (34) is greater than that of the extrusion sealing ring (32).

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