Drive axle wheel seal structure

Abstract

The utility model discloses a kind of drive axle wheel edge sealing structures, belong to drive axle field.The device includes first sealing ring, one end of first sealing ring is connected with rubber seal ring, the inner cavity of first sealing ring is arrayed with locating pin, the surface of rubber seal ring is spaced apart with multiple locating holes, locating pin is embedded inside locating hole, one end of first sealing ring is provided with side seal cover ring, when rubber seal ring is clamped to the inside of first sealing ring, the support bevel set in the inside of first sealing ring disperses axial stress, prevent rubber seal ring from being squeezed out gap under high pressure, the position of rubber seal ring is fixed by locating pin clamped in the inside of locating hole, avoid that rubber seal ring is loose under long-term vibration or temperature difference, spring generates pre-compression when assembling by protruding portion, form initial sealing barrier, most oil liquid can be effectively blocked to directly impact rubber seal ring, improve the sealing effect of drive axle sealing structure.

Description

Technical Field

[0001] This utility model relates to the field of drive axles, and in particular to a drive axle wheel-side sealing structure. Background Technology

[0002] The drive axle is the end component of a car's transmission system, located between the gearbox and the drive wheels. It consists of a final drive, differential, half shafts, and drive axle housing. Its core structure includes reducing speed and increasing torque through the gear set of the final drive; coordinating the speed difference between the two wheels through the differential to ensure steering stability; and transmitting engine power to the drive wheels via the half shafts. It also bears the vertical force, longitudinal force, and braking force from the road surface.

[0003] Oil seals are the core components of drive axle sealing. They are typically used to prevent leakage through static seals (such as gaskets and O-rings) and dynamic seals (such as lip seals). Static seals are used between fixed components and rely on elasticity to fill the gap. Dynamic seals use a lip to press against the rotating shaft and combine with a spring to increase the sealing pressure, preventing lubricating oil leakage and contaminant entry.

[0004] In summary, in the existing drive axle sealing structure, the sealing ring is prone to displacement due to assembly errors or external impacts, resulting in eccentricity between the lip and the mating surface, which leads to oil leakage. Utility Model Content

[0005] This utility model provides a drive axle wheel-side sealing structure, which can solve the problem in the prior art drive axle sealing structure where the sealing ring is easily displaced due to assembly errors or external impacts, resulting in eccentricity between the lip and the mating surface and causing oil leakage.

[0006] A drive axle wheel-side sealing structure includes a drive axle body, wherein sealing components are symmetrically arranged at both ends of the drive axle body; The drive axle body includes an axle housing, with half-shaft sleeves symmetrically arranged at both ends of the axle housing, a half-shaft sleeve fitted onto the outside of the half-shaft sleeve, and a moving ring provided at one end of the half-shaft. The sealing assembly includes a first sealing ring, one end of which is snapped with a rubber sealing ring. The first sealing ring is sleeved on the outside of the rotating ring. Positioning pins are arranged in an array in the inner cavity of the first sealing ring. Multiple positioning holes are spaced apart on the surface of the rubber sealing ring. The positioning pins are embedded in the interior of the positioning holes. A side sealing ring is provided at one end of the first sealing ring.

[0007] Preferably, a flange is provided at one end of the half shaft, and a first fixing screw is connected between the moving ring and the flange.

[0008] Preferably, one end of the moving ring extends laterally with an extension sleeve, which is embedded in the gap between the first sealing ring and the side sealing ring and the half shaft.

[0009] Preferably, the inner wall of the first sealing ring is provided with a supporting inclined surface, and one end of the supporting inclined surface is provided with a groove.

[0010] Preferably, one end of the rubber sealing ring has a protruding locking block, which is embedded inside the locking groove.

[0011] Preferably, the inner wall of the side sealing ring is provided with a sealing groove.

[0012] Preferably, springs are symmetrically arranged at both ends of the inner wall of the sealing groove, and the sealing groove is inverted V-shaped.

[0013] Preferably, one end of the spring is provided with a pre-sealing ring, and the pre-sealing ring has a V-shaped cross-section.

[0014] Preferably, the bottom of the spring is fitted against the circumferential side of the extension sleeve, and one end of the rubber sealing ring abuts against the end of the side sealing ring.

[0015] Preferably, one end of the first sealing ring extends upward and is connected to one end of the side sealing ring by a second fixing screw.

[0016] This utility model provides a drive axle wheel-side sealing structure. The supporting inclined surface inside the first sealing ring disperses axial stress when the rubber sealing ring engages with the inside of the first sealing ring, preventing the rubber sealing ring from being squeezed out of the gap under high pressure. A locating pin engages with the inside of the locating hole to fix the position of the rubber sealing ring, preventing it from loosening under long-term vibration or temperature differences. A spring, through its protruding portion, generates pre-compression during assembly, forming an initial sealing barrier that effectively blocks most of the oil from directly impacting the rubber sealing ring, thus improving the sealing effect of the drive axle sealing structure. Attached Figure Description

[0017] Figure 1 A schematic diagram of the overall structure of a drive axle wheel-side sealing structure provided by this utility model; Figure 2 A partial cross-sectional view of a drive axle wheel-side sealing structure provided by this utility model; Figure 3 A partial structural exploded view of a drive axle wheel-side sealing structure provided by this utility model; Figure 4 An enlarged view of section A of the drive axle wheel-side sealing structure provided by this utility model.

[0018] Explanation of reference numerals in the attached figures: 1. Drive axle body; 2. Sealing assembly; 11. Axle housing; 12. Half-shaft sleeve; 13. Wheel hub; 14. Flange; 15. First fixing screw; 16. Half-shaft; 21. Dynamic ring; 210. Extension sleeve; 22. First sealing ring; 220. Supporting inclined surface; 221. Locating pin; 222. Slot; 23. Rubber sealing ring; 230. Locking block; 231. Locating hole; 24. Side sealing ring; 240. Sealing groove; 25. Second fixing screw; 26. Spring; 27. Pre-sealing ring. Detailed Implementation

[0019] The specific embodiments of this utility model are described in detail below, but it should be understood that the protection scope of this utility model is not limited to the specific embodiments.

[0020] like Figures 1 to 4 As shown, the present invention provides a drive axle wheel-side sealing structure, including a drive axle body 1, with sealing components 2 symmetrically arranged at both ends of the drive axle body 1; The drive axle body 1 includes an axle housing 11. Half-shaft sleeves 12 are symmetrically arranged at both ends of the axle housing 11. Half-shafts 16 are sleeved on the outside of the half-shaft sleeves 12. A rotating ring 21 is provided at one end of the half-shaft 16. The sealing assembly 2 includes a first sealing ring 22, one end of which is fitted with a rubber sealing ring 23. The first sealing ring 22 is sleeved on the outside of the rotating ring 21. Positioning pins 221 are arranged in an array within the inner cavity of the first sealing ring 22. Multiple positioning holes 231 are spaced apart on the surface of the rubber sealing ring 23, and the positioning pins 221 are embedded inside the positioning holes 231. A side sealing sleeve 24 is provided at one end of the first sealing ring 22, and a flange 14 is provided at one end of the half-shaft 16. A first fixing screw 15 connects the rotating ring 21 and the flange 14. A support slope is provided at one end of the first sealing ring 22. The surface 220 and the locking block 230 are interlocked. At the same time, the positioning pin 221 is inserted into the positioning pin 221 at one end of the rubber sealing ring 23 when the rubber sealing ring 23 is installed into the first sealing ring 22 by means of the same inclination direction as the supporting inclined surface 220. This prevents the rubber sealing ring 23 from shifting axially and ensures that it is always in the designed position. One end of the rubber sealing ring 23 is locked into the inside of the slot 222, and the other end is fixed between the first sealing ring 22 and the side sealing ring 24 by the side sealing ring 24 and the second fixing screw 25 provided around the first sealing ring 22.

[0021] One end of the moving ring 21 extends laterally to form an extension sleeve 210, which is embedded in the gap between the first sealing ring 22, the side sealing ring 24, and the half shaft 16. The inner wall of the first sealing ring 22 is provided with a supporting inclined surface 220, and one end of the supporting inclined surface 220 is provided with a groove 222. One end of the rubber sealing ring 23 has a protruding locking block 230, which is embedded in the groove 222. The inner wall of the side sealing ring 24 is provided with a sealing groove 240. The main components of the drive axle include a main reducer that reduces speed, increases torque, and changes the direction of power transmission through gear transmission; a differential that allows the left and right drive wheels to rotate at different speeds to ensure that the tires do not slip when the vehicle is turning; and the half shaft 16 that transmits power from the differential to the flange 14, which drives the vehicle through the wheel hub 13. The axle housing 11 supports and protects the internal components and is divided into two structures: integral non-disconnectable and disconnectable.

[0022] Springs 26 are symmetrically arranged at both ends of the inner wall of the sealing groove 240. The sealing groove 240 is inverted V-shaped. A pre-sealing ring 27 is provided at one end of the spring 26. The pre-sealing ring 27 has a V-shaped cross section. The bottom of the spring 26 is attached to the circumferential side of the extension sleeve 210. One end of the rubber sealing ring 23 abuts against the end of the side sealing ring 24. One end of the first sealing ring 22 extends upward and is connected to one end of the side sealing ring 24 by a second fixing screw 25. The inner wall of the side sealing ring 24 is initially sealed by the pre-sealing ring 27 with the axial surface pressing structure of the spring 26. The spring 26 is used to provide a continuous radial clamping force so that the lip structure at the bottom of the pre-sealing ring 27 can fit tightly against the surface of the extension sleeve 210, preventing media leakage and external contaminant intrusion. The spring 26 can also compensate for the fatigue loss of the pre-sealing ring 27 and extend the service life of the seal.

[0023] Working principle: First, the support slope 220 at one end of the first sealing ring 22 engages with the locking block 230. Simultaneously, when the rubber sealing ring 23 is installed into the first sealing ring 22, the positioning pin 221, which is inclined in the same direction as the support slope 220, inserts into the positioning pin 221 at one end of the rubber sealing ring 23. This prevents the rubber sealing ring 23 from shifting axially, ensuring it remains in its designed position. One end of the rubber sealing ring 23 is secured inside the locking groove 222, while the other end is connected to the first sealing ring 22 by the side sealing ring 24. The second fixing screws 25, which are set around the perimeter, are fixed between the first sealing ring 22 and the side sealing ring 24. The inner wall of the side sealing ring 24 is initially sealed by a pre-sealing ring 27 with a spring 26 pressing the shaft surface. The spring 26 is used to provide a continuous radial clamping force so that the lip structure at the bottom of the pre-sealing ring 27 can fit tightly against the surface of the extension sleeve 210, preventing media leakage and external contaminant intrusion. When the half shaft 16 transmits power from the differential to the flange 14, it prevents lubricating oil leakage and contaminant intrusion when driving the vehicle through the wheel hub 13.

[0024] The above-disclosed embodiments are only a few specific examples of the present utility model. However, the embodiments of the present utility model are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present utility model.

Claims

1. A drive axle wheel-side sealing structure, comprising a drive axle body (1), characterized in that, The drive axle body (1) is symmetrically provided with sealing components (2) at both ends; The drive axle body (1) includes an axle housing (11), with half-shaft sleeves (12) symmetrically arranged at both ends of the axle housing (11), and a half-shaft (16) sleeved on the outside of the half-shaft sleeve (12), with a moving ring (21) arranged at one end of the half-shaft (16). The sealing assembly (2) includes a first sealing ring (22), one end of which is fitted with a rubber sealing ring (23). The first sealing ring (22) is sleeved on the outside of the moving ring (21). The inner cavity of the first sealing ring (22) is provided with positioning pins (221) in an array. The surface of the rubber sealing ring (23) is provided with a plurality of positioning holes (231) spaced apart. The positioning pins (221) are embedded in the interior of the positioning holes (231). One end of the first sealing ring (22) is provided with a side sealing collar (24).

2. The drive axle wheel-side sealing structure as described in claim 1, characterized in that, A flange (14) is provided at one end of the half shaft (16), and a first fixing screw (15) is connected between the moving ring (21) and the flange (14).

3. The drive axle wheel-side sealing structure as described in claim 1, characterized in that, One end of the moving ring (21) extends to the side with an extension sleeve (210), which is embedded in the gap between the first sealing ring (22) and the side sealing ring (24) and the half shaft (16).

4. The drive axle wheel-side sealing structure as described in claim 3, characterized in that, The inner wall of the first sealing ring (22) is provided with a supporting inclined surface (220), and one end of the supporting inclined surface (220) is provided with a groove (222).

5. The drive axle wheel-side sealing structure as described in claim 4, characterized in that, One end of the rubber sealing ring (23) has a protruding locking block (230), which is embedded in the inside of the locking groove (222).

6. The drive axle wheel-side sealing structure as described in claim 5, characterized in that, The inner wall of the side sealing ring (24) is provided with a sealing groove (240).

7. The drive axle wheel-side sealing structure as described in claim 6, characterized in that, Springs (26) are symmetrically arranged at both ends of the inner wall of the sealing groove (240), and the sealing groove (240) is inverted V-shaped.

8. The drive axle wheel-side sealing structure as described in claim 7, characterized in that, One end of the spring (26) is provided with a pre-sealing ring (27), and the pre-sealing ring (27) has a V-shaped cross section.

9. The drive axle wheel-side sealing structure as described in claim 8, characterized in that, The bottom of the spring (26) is attached to the circumferential side of the extension sleeve (210), and one end of the rubber sealing ring (23) abuts against the end of the side sealing ring (24).

10. The drive axle wheel-side sealing structure as described in claim 4, characterized in that, One end of the first sealing ring (22) extends upward and is connected to one end of the side sealing ring (24) by a second fixing screw (25).

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