Large road maintenance machinery axle gear box end face skeleton oil seal

Abstract

The utility model relates to a large -scale road maintenance machinery axle gear box end face framework oil seal, including framework sealing ring, spring ring and locking mechanism, the spring ring detachable installation is in the framework sealing ring, the framework sealing ring is open -ended structure, it has first port and second port, locking mechanism set up in the butt joint at first port and second port for the framework sealing ring locking is closed annular, the inside of framework sealing ring is equipped with the annular recess that contains spring ring, the utility model has the advantages that: through the open -ended structure of traditional integral closed -loop oil seal innovatively designs for, and cooperates split -type spring and mechanical locking mechanism, can in not disassembling wheel and gear box body's condition, only decomposes gear box end face gland can complete the replacement of oil seal. Simplify the maintenance process, save a lot of manpower and time cost, significantly shorten the downtime of large -scale road maintenance machinery.

Description

Technical Field

[0001] This utility model relates to an oil seal on the end face of the gearbox of a large road maintenance machine, belonging to the field of oil seals, and is used in large road maintenance machinery. Background Technology

[0002] Large-scale track maintenance machinery is a key piece of equipment in railway line maintenance operations, and the sealing performance of its axle gearboxes directly affects the reliability and service life of the transmission system. Currently, closed-loop skeleton oil seals are commonly used to seal the end faces of axle gearboxes in this field. These oil seals are complete rubber-metal composite rings with embedded annular springs to provide continuous clamping force.

[0003] However, this integrated closed-loop structure has significant drawbacks in actual maintenance and replacement processes. When the oil seal fails and needs replacement, operators must completely disassemble the wheel assemblies at both ends of the axle and the gearbox body before the closed-loop oil seal can be fitted onto the axle journal. This disassembly process is cumbersome and complex, consuming a lot of manpower and time, resulting in long downtime of mechanical equipment and seriously affecting the operational efficiency of large track maintenance machinery and the planned execution of railway maintenance operations.

[0004] Therefore, there is an urgent need for a new type of sealing structure that can achieve quick and convenient replacement while ensuring sealing performance, avoiding unnecessary disassembly of large components such as wheels and gearboxes, in order to solve the technical problems of high maintenance costs and low operating efficiency in existing technologies. Utility Model Content

[0005] To overcome the shortcomings of the prior art, this utility model provides an axle gearbox end face skeleton oil seal. The technical solution of this utility model is as follows: A large road maintenance machinery axle gearbox end face skeleton oil seal includes a skeleton sealing ring, a spring ring, and a locking mechanism. The spring ring is detachably mounted on the skeleton sealing ring. The skeleton sealing ring has an open structure with a first port and a second port. The locking mechanism is located at the junction of the first port and the second port to lock the skeleton sealing ring into a closed loop. The inner side of the skeleton sealing ring is provided with an annular groove for accommodating the spring ring.

[0006] The spring coil is arranged in a straight line in the released state. The first end of the spring coil is provided with a threaded male end, and the second end is provided with a threaded female end that matches the threaded male end. After the threaded male end and the threaded female end are connected, the straight spring coil is formed into an annular spring coil and placed in the annular groove.

[0007] The locking mechanism includes a first connecting end plate disposed at a first port and a second connecting end plate disposed at a second port. The second connecting end plate corresponds to the first connecting end plate, and a locking screw passes through the first connecting end plate and the second connecting end plate and is fitted with a locking nut.

[0008] A rubber pad is filled between the first connecting end plate and the second connecting end plate, and the locking screw passes through the rubber pad.

[0009] The material of the skeleton sealing ring is nitrile rubber or fluororubber.

[0010] The cross-section of the skeleton sealing ring is U-shaped, and the annular groove is formed by the two lips of the U-shape and the supporting bottom.

[0011] The spring coil is a stainless steel spring with a galvanized surface or a rust-proof coating.

[0012] The male threaded end is integrally formed with the spring ring, and the female threaded end is a threaded hole opened at the end of the spring ring.

[0013] 1. By innovatively designing the traditional integral closed-loop oil seal into an open structure, and combining it with a split spring and a mechanical locking mechanism, the oil seal can be replaced without disassembling the wheels and gearbox body; only the gearbox end face cover needs to be disassembled. This simplifies the maintenance process, saves manpower and time costs, and significantly reduces downtime for large road maintenance machinery.

[0014] 2. A rigid locking mechanism consisting of a connecting end plate, locking screws, and nuts is adopted, and by adding rubber gaskets, the connection strength and sealing at the port joint are ensured, effectively preventing the oil seal from loosening or leaking under high pressure and vibration conditions.

[0015] 3. The straight spring can be quickly connected to form a closed loop through the threaded connection. The flexible skeleton sealing ring ports can be staggered, which allows the diameter of the entire oil seal to be temporarily changed. It has elastic deformation capability and saves time and effort in the installation process.

[0016] 4. The spring ring is made of rust-proof stainless steel and is connected by an integrated threaded male and female connector. The structure is sturdy and durable, with strong corrosion resistance, and achieves long-term stability of elastic compensation force, thereby extending the overall service life of the oil seal.

[0017] This utility model innovatively solves the industry problem of inconvenient replacement of seals in the axle gearboxes of large road maintenance machinery. While ensuring sealing performance, it also enables quick maintenance, and has extremely high practical value and economic benefits. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main structure of this utility model.

[0019] Figure 2 yes Figure 1 A schematic diagram of the structure of the middle spring coil.

[0020] Figure 3 yes Figure 1 A schematic diagram of the structure of the central skeleton sealing ring. Detailed Implementation

[0021] The present invention will be further described below with reference to specific embodiments, and the advantages and features of the present invention will become clearer as a result of the description. However, these embodiments are merely exemplary and do not constitute any limitation on the scope of the present invention. Those skilled in the art should understand that modifications or substitutions can be made to the details and form of the technical solution of the present invention without departing from the spirit and scope of the present invention, but all such modifications and substitutions fall within the protection scope of the present invention.

[0022] See Figures 1 to 3 This utility model relates to a skeleton oil seal on the end face of a gearbox of a large road maintenance machinery axle, including a skeleton sealing ring 1, a spring ring 4, and a locking mechanism. The spring ring 4 is detachably mounted on the skeleton sealing ring 1. The skeleton sealing ring 1 has an open structure with a first port and a second port. The locking mechanism is located at the junction 5 of the first port and the second port to lock the skeleton sealing ring 1 into a closed ring shape. The inner side of the skeleton sealing ring 1 is provided with an annular groove 2 for accommodating the spring ring 4.

[0023] The advantages of this axle gearbox end face skeleton oil seal are as follows: 1. The skeleton seal ring 1 adopts a unique open design and is equipped with a special locking mechanism, which allows it to be directly fitted into the axle box sealing part from the side without disassembling the wheel and gearbox as a whole, greatly simplifying the installation process and improving maintenance efficiency.

[0024] 2. The locking mechanism locks the opening at the docking point 5 into a closed ring shape. Combined with the continuous radial clamping force provided by the spring ring 4 housed in the annular groove 2, the sealing reliability of the oil seal is ensured under high-speed rotation and vibration conditions, effectively preventing lubricating oil leakage.

[0025] 3. While maintaining the advantages of traditional skeleton oil seals with U-shaped lip seals, the design of partial disassembly and relocking makes it suitable for sealing the end face of gearboxes in large road maintenance machinery where space is limited or complete disassembly is not easy, thus having strong engineering applicability.

[0026] The spring coil 4 is arranged in a straight line in the released state. The first end of the spring coil 4 is provided with a threaded male head 41, and the second end is provided with a threaded female head 42 that matches the threaded male head. After the threaded male head and the threaded female head are connected, the straight spring coil is formed into an annular spring coil and placed in the annular groove.

[0027] The straight-shaped spring ring 4 can be easily placed into the annular groove 2 of the skeleton sealing ring 1 during actual installation, and then connected, requiring little operating space.

[0028] A complete closed loop can be formed by connecting the threaded male end 41 and the threaded female end 42. This design makes the final closed circumference of the spring ring 4 adjustable within a certain range (by fine-tuning the number of turns screwed in), thus better adapting to minor dimensional changes in the skeleton seal ring 1 or due to wear, ensuring a stable and appropriate clamping force, and enhancing the product's versatility and fault tolerance.

[0029] With its simple structure and robust, reliable connection, it effectively prevents the spring ring 4 from loosening under long-term vibration conditions. Once tightened, its high connection strength ensures the long-term stability of the sealing effect.

[0030] If the spring loses its elasticity or becomes damaged due to prolonged use, it can be easily removed and replaced by unscrewing the threaded connection without discarding the entire skeleton seal ring1. This modular design allows for the separate replacement of parts, reducing subsequent maintenance costs and material waste.

[0031] The locking mechanism includes a first connecting end plate 6 disposed at a first port and a second connecting end plate 7 disposed at a second port. The second connecting end plate 7 corresponds to the first connecting end plate 6. A locking screw 8 passes through the first and second connecting end plates and is fitted with a locking nut. A rubber gasket 9 is filled between the first connecting end plate 6 and the second connecting end plate 7, and the locking screw 8 passes through the rubber gasket 9.

[0032] 1. The mechanical fastening method using locking screws 8 and locking nuts provides a reliable rigid connection, which can effectively resist the high-frequency vibration and impact generated during the operation of the axle gearbox, prevent the port from loosening or separating due to vibration, and ensure the continuous closure and sealing integrity of the sealing ring.

[0033] 2. A rubber gasket 9 is filled between the first connecting end plate 6 and the second connecting end plate 7. This rubber gasket is compressed when the locking screw 8 is tightened, perfectly filling all the microscopic gaps at the port mating point. This not only achieves a seal between the metal parts of the locking mechanism itself and fills the gaps at the port mating point, but also enhances the overall oil seal's leak-proof capability at the mating point.

[0034] 3. By tightening or loosening the lock nut, the clamping force applied to the connecting end plate and the rubber gasket can be precisely controlled. This allows the operator to adjust the tightening degree according to the actual situation, ensuring sufficient locking force while avoiding damage to the sealing ring or end plate due to excessive clamping force. This makes the locking mechanism highly adaptable to different working conditions and dimensional tolerances.

[0035] 4. It can be completed using only standard tools, making it ideal for on-site maintenance conditions and lowering the technical threshold for operators. As a consumable part, the rubber pad 9 can be easily replaced individually during routine maintenance without replacing the entire locking mechanism or the skeleton seal ring, resulting in low maintenance costs and extending the service life of the entire device.

[0036] The material of the skeleton sealing ring 1 is nitrile rubber or fluororubber.

[0037] The cross-section of the skeleton sealing ring 1 is U-shaped, and the annular groove is formed by the two lips 3 on both sides of the U-shape and the supporting bottom.

[0038] The spring coil 4 is a stainless steel spring with a galvanized surface or a rust-proof coating.

[0039] The threaded male connector 41 is integrally formed with the spring coil 4, and the threaded female connector 42 is a threaded hole opened at the end of the spring coil. The threaded male connector 41 and the spring coil 4 are manufactured using an integral forming process, avoiding the risk of breakage or loosening that may be caused by welding or additional connecting parts. This integrated structure greatly improves the mechanical strength of the connection, enabling it to reliably withstand the radial tension and working vibration of the spring coil, ensuring long-term stability.

[0040] The one-piece threaded male head 41 eliminates the electrochemical corrosion or wear problems caused by connecting different materials. The matching threaded female head 42 is directly machined onto the end of the spring. The structure is compact and has no additional vulnerable parts, ensuring the durability of the threaded connection pair and the long-term stability of the sealing pressure throughout the entire product life cycle.

[0041] 1. First, bend the spring coil 4, which is in a straight position, so that the threaded male end 41 at its first end is screwed into the threaded female end 42 at its second end. By fine-tuning the number of turns, a closed ring spring is formed. The spring coil is made of rust-resistant stainless steel, ensuring its elasticity and durability.

[0042] 2. Place the assembled annular spring ring 4 into the annular groove 2 inside the skeleton sealing ring 1. The skeleton sealing ring 1 is made of nitrile rubber or fluororubber, and its U-shaped cross-section forms sealing lips 3 on both sides and a groove to accommodate the spring. The function of the spring ring 4 is to provide a continuous and uniform radial clamping force to the sealing lips 3.

[0043] 3. Since the skeleton seal ring 1 itself is an open structure and the material is flexible, the operator can easily stagger its two ports, so that the oil seal can be directly fitted from the side onto the designated sealing end face of the axle gearbox without disassembling the wheel and gearbox.

[0044] 4. Align the first and second ports of the fitted skeleton sealing ring 1 at the mating point. Then, pass the locking screw 8 through the first connecting end plate 6, the rubber gasket 9, and the second connecting end plate 7 in sequence, and finally tighten the locking nut.

[0045] After tightening the nut, the mechanical locking force provided by the screw and nut firmly fixes the two ends together, forming a complete sealing ring that can effectively resist severe vibrations during equipment operation and prevent loosening.

[0046] At the same time, the compressed rubber pad 9 perfectly fills all the gaps between the two end plates, forming a secondary seal for the locking mechanism itself, completely eliminating the possibility of oil leakage from the port connection.

[0047] 5. After installation, under the radial clamping force of the spring ring 4 and the rigidity of the locking mechanism, the U-shaped sealing lip 3 of the oil seal tightly adheres to the journal surface, forming a reliable main seal. During equipment operation, this structure can maintain excellent sealing performance for a long time under high-speed rotation and harsh working conditions.

[0048] This utility model achieves rapid installation in narrow spaces through an innovative structural combination of split spring threaded connection into a ring and open sealing ring mechanical locking closure. At the same time, the combination of rigid locking and flexible sealing ensures the reliability and durability of the final sealing effect.

[0049] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A skeleton oil seal for the end face of the gearbox of a large road maintenance machinery axle, characterized in that, The device includes a skeleton sealing ring, a spring ring, and a locking mechanism. The spring ring is detachably mounted on the skeleton sealing ring. The skeleton sealing ring has an open structure with a first port and a second port. The locking mechanism is located at the junction of the first port and the second port to lock the skeleton sealing ring into a closed loop. The inner side of the skeleton sealing ring is provided with an annular groove for accommodating the spring ring.

2. The large road maintenance machinery axle gearbox end face skeleton oil seal according to claim 1, characterized in that, The spring coil is arranged in a straight line in the released state. The first end of the spring coil is provided with a threaded male end, and the second end is provided with a threaded female end that matches the threaded male end. After the threaded male end and the threaded female end are connected, the straight spring coil is formed into an annular spring coil and placed in the annular groove.

3. The large road maintenance machinery axle gearbox end face skeleton oil seal according to claim 1 or 2, characterized in that, The locking mechanism includes a first connecting end plate disposed at a first port and a second connecting end plate disposed at a second port. The second connecting end plate corresponds to the first connecting end plate, and a locking screw passes through the first connecting end plate and the second connecting end plate and is fitted with a locking nut.

4. The large road maintenance machinery axle gearbox end face skeleton oil seal according to claim 3, characterized in that, A rubber pad is filled between the first connecting end plate and the second connecting end plate, and the locking screw passes through the rubber pad.

5. The large road maintenance machinery axle gearbox end face skeleton oil seal according to claim 1, characterized in that, The material of the skeleton sealing ring is nitrile rubber or fluororubber.

6. The large road maintenance machinery axle gearbox end face skeleton oil seal according to claim 5, characterized in that, The cross-section of the skeleton sealing ring is U-shaped, and the annular groove is formed by the two lips of the U-shape and the supporting bottom.

7. The large road maintenance machinery axle gearbox end face skeleton oil seal according to claim 6, characterized in that, The spring coil is a stainless steel spring with a galvanized surface or a rust-proof coating.

8. The large road maintenance machinery axle gearbox end face skeleton oil seal according to claim 2, characterized in that, The male threaded end is integrally formed with the spring ring, and the female threaded end is a threaded hole opened at the end of the spring ring.

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