A sealing structure for a front drive axle assembly

Abstract

This utility model relates to the field of sealing technology for front drive axle assemblies, and discloses a sealing structure for a front drive axle assembly, including a housing. An outer frame plate is fixedly connected to the end face of the housing. A cover is fixedly connected to the side wall of the outer frame plate by bolts. A sealing assembly is provided between the outer frame plate and the cover. The sealing assembly includes a groove formed on the surface of the outer frame plate. A sealing gasket is inserted into the groove, and a pressing plate is attached to the bottom surface of the sealing gasket. The pressing plate is slidably connected inside the groove. This sealing structure for the front drive axle assembly, through the cooperation of a support spring, a threaded rod, and a nut, allows the pressing plate to compensate for the wear of the sealing gasket in real time. Simultaneously, the elastic deformation of the spring absorbs vibration impact energy, preventing the sealing gasket from breaking due to rigid compression. This reduces the risk of oil leakage under high-frequency vibration conditions and extends the life of the sealing gasket.

Description

Technical Field

[0001] This utility model relates to the field of sealing technology for front drive axle assemblies, specifically a sealing structure for a front drive axle assembly. Background Technology

[0002] The front drive axle assembly is a core component for vehicle power transmission and driving support, integrating functions such as transmission, load bearing, and sealing. Its performance directly affects the vehicle's handling and reliability.

[0003] According to a disclosed sealing structure for a front drive axle assembly (Announcement No.: CN221213327U), the above application improves the sealing performance of the sealing ring under vibration conditions by setting sealing rings with unequal cross-sections, which can form multiple sealing zones with different degrees of extrusion deformation with the mating end face of the rear oil cover.

[0004] However, under high-frequency vibration, the dynamic response of different hardness regions in unequal thickness structures may be inconsistent. The third region has high hardness and small deformation, while the second region has large deformation, which can easily lead to increased local wear of the sealing ring and reduce its service life. Utility Model Content

[0005] The purpose of this invention is to provide a sealing structure for a front drive axle assembly to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a sealing structure for a front drive axle assembly, comprising a housing, an outer frame plate fixedly connected to the end face of the housing, a cover fixedly connected to the side wall of the outer frame plate by bolts, a sealing assembly provided between the outer frame plate and the cover, the sealing assembly comprising a groove, the groove being formed on the surface of the outer frame plate, a sealing gasket inserted into the inside of the groove, a pressing plate being attached to the bottom surface of the sealing gasket, the pressing plate being slidably connected to the inside of the groove, the pressing plate being elastically connected to the inner wall of the groove by multiple sets of support springs, and multiple sets of arrayed threaded rods fixedly connected to the bottom surface of the pressing plate, the threaded rods penetrating and slidably connected to the bottom surface of the outer frame plate.

[0007] Preferably, an oil baffle is fixedly connected to the inner wall of the housing, and the oil baffle includes a bending plate, which is integrally formed with the housing.

[0008] Preferably, the side wall of the bent plate has a slot, and a filter screen is inserted into the slot.

[0009] Preferably, the sidewall of the filter screen is fixedly connected with a protruding plate.

[0010] Preferably, the outer wall of the threaded rod is threaded with a nut.

[0011] Preferably, the nut is fitted to the bottom surface of the outer frame plate.

[0012] Compared with the prior art, this utility model provides a sealing structure for a front drive axle assembly, which has the following beneficial effects:

[0013] 1. The sealing structure of this front drive axle assembly, through the cooperation of a support spring, threaded rod, and nut, allows the compression plate to compensate for the wear of the gasket in real time. Simultaneously, the elastic deformation of the spring absorbs vibration impact energy, preventing the gasket from breaking due to rigid compression. This reduces the risk of oil leakage under high-frequency vibration conditions and extends the gasket's lifespan.

[0014] 2. The sealing structure of the front drive axle assembly uses a filter screen to intercept metal debris and impurities in the gear oil, preventing blockage at the oil outlet. The slot allows for quick installation and removal of the filter screen, and the protruding plate facilitates the insertion and removal of the filter screen, improving maintenance convenience. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the sealing assembly structure of this utility model;

[0017] Figure 3 This utility model Figure 2 A schematic diagram of the enlarged structure of A in the middle;

[0018] Figure 4 This is a schematic diagram of the oil baffle structure of this utility model.

[0019] In the diagram: 1. Housing; 2. Outer frame plate; 3. Cover; 4. Sealing assembly; 41. Groove; 42. Sealing gasket; 43. Extrusion plate; 44. Support spring; 45. Threaded rod; 46. Nut; 5. Oil baffle; 51. Bending plate; 52. Slot; 53. Filter screen; 54. Protruding plate. Detailed Implementation

[0020] like Figures 1-4 As shown, this utility model provides a technical solution: a sealing structure for a front drive axle assembly, including a housing 1, which serves as the main frame of the front drive axle, supporting internal transmission components and bearing the load during vehicle operation. An outer frame plate 2 is fixedly connected to the end face of the housing 1, and a cover 3 is fixedly connected to the side wall of the outer frame plate 2 by bolts. The outer frame plate 2 serves as the mounting base for the cover 3, and together with the cover 3, forms a closed structure at the end of the drive axle.

[0021] like Figures 1-4As shown, a sealing assembly 4 is provided between the outer frame plate 2 and the cover 3. The sealing assembly 4 includes a groove 41, which is formed on the surface of the outer frame plate 2. The groove 41 is used to accommodate a sealing gasket 42 and a compression plate 43, defining the installation position of the sealing component. The sealing gasket 42 is inserted into the inside of the groove 41, filling the gap between the outer frame plate 2 and the cover 3, and blocking the oil leakage path through elastic deformation. A compression plate 43 is attached to the bottom surface of the sealing gasket 42. The compression plate 43 is slidably connected inside the groove 41. The compression plate 43 is elastically connected to the inner wall of the groove 41 by multiple sets of support springs 44. Multiple sets of arrayed threaded rods 45 are fixedly connected to the bottom surface of the compression plate 43. The threaded rods 45 pass through and are slidably connected to the bottom surface of the outer frame plate 2. When the outer frame plate 2 and the cover 3 are bolted together, the support springs 44 keep the compression plate 43 pressing the sealing gasket 42 tightly, compensating for the permanent compression deformation of the sealing gasket 42 caused by long-term use, and buffering the vibration and impact during vehicle operation, preventing the sealing gasket 42 from breaking or failing due to rigid compression. A nut 46 is threadedly connected to the outer wall of the threaded rod 45, and the nut 46 is attached to the bottom surface of the outer frame plate 2. The cooperation between the threaded rod 45 and the nut 46 allows the compression plate 43 to be moved by rotating the nut 46, thereby changing the pre-tightness of the sealing gasket 42. This allows for flexible adjustment according to different working conditions or the aging of the sealing gasket 42, ensuring that the sealing pressure is always at the optimal state.

[0022] like Figures 1-4 As shown, an oil baffle 5 is fixedly connected to the inner wall of the housing 1. The oil baffle 5 includes a bent plate 51, which is integrally formed with the housing 1. A slot 52 is provided on the side wall of the bent plate 51, and a filter screen 53 is inserted into the slot 52. A protruding plate 54 is fixedly connected to the side wall of the filter screen 53. The integrally formed bent plate 51 and housing 1 ensure structural strength while allowing for quick installation and removal of the filter screen 53 through the slot 52. The filter screen 53 can intercept metal debris and impurities in the gear oil, preventing blockage of the oil outlet. The protruding plate 54 facilitates the insertion and removal of the filter screen 53, improving maintenance convenience.

[0023] In this invention, during use, when the vehicle travels over bumpy roads, the housing 1 and the cover 3 may experience slight relative displacement. The support spring 44 absorbs vibration energy through compression / elongation, preventing the sealing gasket 42 from being torn due to rigid impact, while maintaining continuous pressure of the extrusion plate 43 on the sealing gasket 42. After long-term use, the sealing gasket 42 gradually wears and thins. The support spring 44 pushes the extrusion plate 43 to slowly move upward, automatically filling the gap caused by wear, maintaining sealing performance without manual intervention.

[0024] Furthermore, by rotating the nut 46, the position of the extrusion plate 43 can be adjusted, thereby changing the pre-tightness of the sealing gasket 42. This allows for flexible adjustment based on different operating conditions or the aging of the sealing gasket 42, ensuring that the sealing pressure is always at its optimal state. The filter screen 53 can intercept metal debris and impurities in the gear oil, preventing blockage at the oil outlet. The slot 52 enables quick installation and removal of the filter screen 53, and the protruding plate 54 facilitates the insertion and removal of the filter screen 53, improving maintenance convenience.

[0025] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A sealing arrangement for a front drive axle assembly comprising a housing (1), characterized in that: The end face of the housing (1) is fixedly connected to an outer frame plate (2). The side wall of the outer frame plate (2) is fixedly connected to a cover (3) by bolts. A sealing assembly (4) is provided between the outer frame plate (2) and the cover (3). The sealing assembly (4) includes a groove (41). The groove (41) is opened on the surface of the outer frame plate (2). A sealing gasket (42) is inserted into the inside of the groove (41). A pressing plate (43) is attached to the bottom surface of the sealing gasket (42). The pressing plate (43) is slidably connected to the inside of the groove (41). The pressing plate (43) is elastically connected to the inner wall of the groove (41) by multiple sets of support springs (44). Multiple sets of arrayed threaded rods (45) are fixedly connected to the bottom surface of the pressing plate (43). The threaded rods (45) penetrate and are slidably connected to the bottom surface of the outer frame plate (2).

2. A seal arrangement for a front drive axle assembly as defined in claim 1, wherein: An oil baffle (5) is fixedly connected to the inner wall of the housing (1). The oil baffle (5) includes a bending plate (51), which is integrally formed with the housing (1).

3. A seal arrangement for a front drive axle assembly as defined in claim 2, wherein: The side wall of the bent plate (51) is provided with a slot (52), and a filter screen (53) is inserted into the slot (52).

4. The seal arrangement for a front drive axle assembly of claim 3, wherein: The side wall of the filter screen (53) is fixedly connected with a protruding plate (54).

5. The seal arrangement for a front drive axle assembly of claim 1, wherein: The outer wall of the threaded rod (45) is threaded with a nut (46).

6. A seal arrangement for a front drive axle assembly as defined in claim 5 wherein: The nut (46) is attached to the bottom surface of the outer frame plate (2).

Images