Multi-stage sealing protection structure of axle gear box

Abstract

This utility model discloses a multi-stage sealing and protection structure for a vehicle axle gearbox, including a gearbox housing. End caps A and B are bolted to the end faces of the gearbox housing to seal both ends and support the rotation of the internal shaft. A primary sealing assembly is tightly fitted to the inner wall of the gearbox housing to seal the connection between the gearbox housing and end caps A and B. A secondary sealing assembly is dynamically compressed within the primary sealing assembly to further seal the gearbox housing. This utility model improves the overall sealing effect of the gearbox by providing a primary sealing assembly at the connection point of the gearbox's inner wall, allowing for initial sealing, and then further compressing and sealing the gearbox with a secondary sealing assembly inside the primary sealing assembly.

Description

Technical Field

[0001] This utility model relates to the field of axle application technology, and in particular to a multi-stage sealing and protection structure for axle gearbox. Background Technology

[0002] The axle gearbox is a core component of the automotive transmission system. Its internal gears, bearings, and other parts need to operate at high speeds under the lubrication of lubricating oil. To prevent lubricating oil leakage and the intrusion of external contaminants such as dust and mud, a reliable sealing structure must be installed not only at the mating point between the gearbox and the drive shaft, but also at both ends of the entire gearbox.

[0003] In the prior art, most axle gearboxes use single-stage skeleton oil seals as sealing elements, which achieve sealing through the tight fit between the rubber lip and the shaft. The sealing method of gearboxes is generally to directly add gaskets for sealing. However, during long-term vehicle operation, high temperatures are generated inside the gearbox, which accelerates the aging of the gaskets and reduces their sealing effect. Once the single-stage seal fails, lubricating oil will leak rapidly, and the intrusion of external impurities will aggravate the wear of internal parts of the gearbox, seriously affecting the service life of the axle and driving safety. Therefore, this utility model proposes a multi-stage sealing protection structure for axle gearboxes. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a multi-stage sealing protection structure for axle gearboxes, which forms a three-dimensional protective barrier through the synergistic effect of multi-stage sealing units, significantly improving sealing performance and service life.

[0005] To solve the above-mentioned technical problems, the present invention adopts a technical solution as follows: a multi-stage sealing and protection structure for a vehicle axle gearbox is provided, including a gearbox housing, wherein end caps A and B are bolted to the end faces of the gearbox housing to seal both ends of the gearbox housing and support the rotation of the internal shaft;

[0006] The inner wall of the gearbox housing is tightly fitted with a primary sealing assembly for sealing the connection between the gearbox housing and end cover A and end cover B. The primary sealing assembly is internally fitted with a secondary sealing assembly to cooperate with the primary sealing assembly for further sealing of the gearbox housing.

[0007] The present invention is further configured such that: a connecting ring A is provided at the connection between one end face of the gearbox housing and the end cover A, and a connecting ring B is provided at the connection between the other end face of the gearbox housing and the end cover B.

[0008] The above technical solution facilitates the use of connecting rings A and B for initial sealing at the interface during the splicing and installation of the gearbox housing, enabling further reinforcement of the sealing structure in subsequent processes.

[0009] The present invention is further configured such that: the primary sealing assembly includes a sealing ring that is engaged with the end face of the inner wall of the sealing ring, and a plurality of evenly distributed springs A are fixedly connected to the end face of the sealing ring in the circumferential direction;

[0010] It also includes a sealing sleeve that engages with the inner wall of the end cap A, the end face of which abuts against the end faces of a plurality of springs A.

[0011] The above technical solution facilitates the stable installation of the sealing ring inside the sealing ring, and under the action of spring A, the sealing ring and the sealing sleeve can be tightly fixed during installation.

[0012] The present invention is further configured such that: the outer wall and the inner wall of the sealing ring are provided with multiple anti-slip grooves in the axial direction, and the anti-slip grooves on the outer wall and the anti-slip grooves on the inner wall are arranged alternately.

[0013] The above technical solution facilitates stable installation and fixation of the sealing ring using the anti-slip groove, and also provides some barrier against lubricating oil at the connection point to prevent leakage.

[0014] The present invention is further configured such that: the secondary sealing assembly includes a threaded sleeve threaded to the inner wall of the sealing sleeve; a compression ring is sleeved on the outer wall of the threaded sleeve near the end face, and the compression ring is pressed against the inner wall of the sealing sleeve by the threaded sleeve; a connecting rod is abutted at the bend of the end face of the threaded sleeve; the connecting rod passes through the sealing sleeve and is provided with a retaining ring; a spring B is sleeved on the outer wall of the connecting rod; a connecting nut is threaded to the outer wall of the connecting rod near the end face, and the connecting nut abuts against the retaining ring.

[0015] Through the above technical solution, by rotating the threaded sleeve inside the sealing sleeve, its end face is pressed against the compression ring, so that the outer wall of the compression ring is pressed against the sealing sleeve, making the sealing sleeve firmly sealed to the connection between the end cover A and the gearbox housing, while pressing against the connecting rod, and using the connecting nut to lock and fix the retaining ring, thereby improving the sealing performance of the connection.

[0016] The present invention is further configured such that: the inner wall of the threaded sleeve is uniformly fixedly connected with multiple torsion blocks in the circumferential direction.

[0017] The above technical solution facilitates the use of a torsion block to drive the threaded compression sleeve to rotate stably inside the sealing sleeve, thereby squeezing and fixing the compression ring at the end face.

[0018] The present invention is further configured such that: the outer wall of the retaining ring is engaged with the inner wall of the end cap A, and it is pressed against the end face of the sealing sleeve by a connecting nut.

[0019] The above technical solution facilitates the installation and fixation of the retaining ring, and seals the connection between the sealing sleeve and end cap A.

[0020] The beneficial effects of this utility model are as follows:

[0021] 1. The multi-stage sealing protection structure for axle gearbox proposed in this utility model provides a primary sealing component at the connection point of the inner wall of the gearbox, enabling it to perform preliminary sealing of the gearbox.

[0022] 2. The multi-stage sealing protection structure for axle gearbox proposed in this utility model provides a secondary sealing component inside the primary sealing component, which can work with the primary sealing component to further compress and seal the gearbox, thereby improving the overall sealing effect of the gearbox. Attached Figure Description

[0023] Figure 1 This is a structural diagram of a multi-stage sealing and protection structure for a vehicle axle gearbox according to the present invention;

[0024] Figure 2 This is a cross-sectional view of a multi-stage sealing and protection structure for a vehicle axle gearbox according to the present invention.

[0025] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0026] Figure 4 for Figure 2 Enlarged view of point B in the middle.

[0027] In the diagram: 1. Gearbox housing; 2. End cover A; 21. Connecting ring A; 3. End cover B; 31. Connecting ring B; 4. Primary sealing assembly; 41. Sealing ring; 411. Anti-slip groove; 42. Spring A; 43. Sealing sleeve; 5. Secondary sealing assembly; 51. Threaded pressure sleeve; 511. Torsion block; 52. Compression ring; 53. Connecting rod; 54. Spring B; 55. Snap ring; 56. Connecting nut. Detailed Implementation

[0028] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0029] like Figures 1-2As shown, a multi-stage sealing protection structure for a vehicle axle gearbox includes a gearbox housing 1. End caps A2 and B3 are bolted to the end faces of the gearbox housing 1 to seal both ends of the gearbox housing 1 and support the rotation of the internal shaft. A connecting ring A21 is provided at the connection between one end face of the gearbox housing 1 and the end cap A2, and a connecting ring B31 is provided at the connection between the other end face of the gearbox housing 1 and the end cap B3. This facilitates the use of connecting rings A21 and B31 to perform a primary sealing connection at the interface during the splicing and installation of the gearbox housing 1, so as to further strengthen the sealing structure in the subsequent process.

[0030] like Figure 2 and Figure 3 As shown, a primary sealing assembly 4 is tightly fitted to the inner wall of the gearbox housing 1 to seal the connection between the gearbox housing 1 and the end cover A2 and the end cover B3. The primary sealing assembly 4 includes a sealing ring 41 that is snapped onto the inner wall end face of the connecting ring B31. The outer and inner walls of the sealing ring 41 are provided with multiple anti-slip grooves 411 in the axial direction, and the anti-slip grooves 411 on the outer wall and the anti-slip grooves 411 on the inner wall are arranged alternately to facilitate stable installation and fixation of the sealing ring 41 using the anti-slip grooves 411 during installation. Furthermore, when lubricating oil appears at the connection, the anti-slip grooves 411 can provide a certain degree of barrier to prevent leakage. Multiple evenly distributed springs A42 are fixedly connected to the circumferential direction of the end face of the sealing ring 41.

[0031] It also includes a sealing sleeve 43 that engages with the inner wall of the end cap A2. The end face of the sealing sleeve 43 abuts against the end faces of multiple springs A42, which facilitates the stable installation of the sealing ring 41 inside the connecting ring B31. Under the action of the springs A42, the sealing ring 41 and the sealing sleeve 43 can be tightly fixed during installation.

[0032] like Figure 2 and Figure 4As shown, a secondary sealing assembly 5 is installed inside the primary sealing assembly 4 to further seal the gearbox housing 1 in conjunction with the primary sealing assembly 4. The secondary sealing assembly 5 includes a threaded sleeve 51 threaded to the inner wall of the sealing sleeve 43. Multiple torsion blocks 511 are evenly fixedly connected to the inner wall of the threaded sleeve 51 in the circumferential direction, which facilitates the use of the torsion blocks 511 to drive the threaded sleeve 51 to rotate stably inside the sealing sleeve 43, so as to compress and fix the compression ring 52 at the end face. The compression ring 52 is sleeved on the outer wall of the threaded sleeve 51 near the end face, and the compression ring 52 is pressed against the inner wall of the sealing sleeve 43 by the threaded sleeve 51. A connecting rod 53 is tightly installed at the bend of the end face of the threaded sleeve 51. The connecting rod 53 passes through the sealing sleeve 43 and is provided with a retaining ring 55. The outer wall of the retaining ring 55 is engaged with the inner wall of the end cover A2. It is pressed against the end face of the sealing sleeve 43 by the connecting nut 56, which facilitates the installation and fixation of the retaining ring 55 and seals the connection between the sealing sleeve 43 and the end cover A2. The outer wall of the connecting rod 53 is fitted with a spring B54. The outer wall of the connecting rod 53 is threaded with a connecting nut 56 near the end face, and the connecting nut 56 is pressed against the retaining ring 55. By rotating the threaded compression sleeve 51 inside the sealing sleeve 43, its end face is pressed against the compression ring 52, so that the outer wall of the compression ring 52 is pressed against the sealing sleeve 43, making the sealing sleeve 43 firmly sealed at the connection between the end cover A2 and the gearbox housing 1, while pressing against the connecting rod 53. The retaining ring 55 is locked and fixed by the connecting nut 56, which improves the sealing performance of the connection.

[0033] In use, the sealing ring 41 is first stably installed inside the sealing ring 41. Under the action of the spring A42, the sealing ring 41 and the sealing sleeve 43 can be tightly fixed during installation. Then, the threaded compression sleeve 51 rotates inside the sealing sleeve 43, causing its end face to press against the compression ring 52. The outer wall of the compression ring 52 presses against the sealing sleeve 43, making the sealing sleeve 43 firmly sealed and connected to the connection between the end cover A2 and the gearbox housing 1. At the same time, it presses against the connecting rod 53. The retaining ring 55 is locked and fixed using the connecting nut 56, improving the sealing performance of the connection.

[0034] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A multi-stage sealing protection structure for a vehicle axle gearbox, comprising a gearbox housing (1), characterized in that: The end face of the gearbox housing (1) is bolted with end cap A (2) and end cap B (3) respectively to seal both ends of the gearbox housing (1) and support the rotation of the internal shaft; The inner wall of the gearbox housing (1) is tightly fitted with a primary sealing assembly (4) for sealing the connection between the gearbox housing (1) and the end cover A (2) and the end cover B (3). The primary sealing assembly (4) includes a sealing ring (41) that is engaged with the inner wall end face of the connecting ring B (31). Multiple evenly distributed springs A (42) are fixedly connected to the end face of the sealing ring (41) in the circumferential direction. It also includes a sealing sleeve (43) that engages with the inner wall of the end cap A (2), the end face of which abuts against the end face of a plurality of springs A (42); The primary sealing assembly (4) is internally equipped with a secondary sealing assembly (5) to further seal the gearbox housing (1) in conjunction with the primary sealing assembly (4). The secondary sealing assembly (5) includes a threaded sleeve (51) threaded to the inner wall of the sealing sleeve (43). A compression ring (52) is fitted onto the outer wall of the threaded sleeve (51) near the end face. The compression ring (52) is pressed against the inner wall of the sealing sleeve (43) by the threaded sleeve (51). A connecting rod (53) is abutted at the bend of the end face of the threaded sleeve (51). The connecting rod (53) passes through the sealing sleeve (43) and is fitted with a retaining ring (55). A spring B (54) is fitted onto the outer wall of the connecting rod (53). A connecting nut (56) is threaded onto the outer wall of the connecting rod (53) near the end face. The connecting nut (56) abuts against the retaining ring (55).

2. The multi-stage sealing protection structure for an axle gearbox according to claim 1, characterized in that: A connecting ring A (21) is provided at the connection between one end face of the gearbox housing (1) and the end cover A (2), and a connecting ring B (31) is provided at the connection between the other end face of the gearbox housing (1) and the end cover B (3).

3. The multi-stage sealing protection structure for an axle gearbox according to claim 1, characterized in that: The outer and inner walls of the sealing ring (41) are provided with multiple anti-slip grooves (411) in the axial direction, and the anti-slip grooves (411) on the outer wall and the anti-slip grooves (411) on the inner wall are arranged alternately.

4. The multi-stage sealing protection structure for an axle gearbox according to claim 1, characterized in that: The inner wall of the threaded sleeve (51) is uniformly fixedly connected with multiple torsion blocks (511) in the circumferential direction.

5. The multi-stage sealing protection structure for an axle gearbox according to claim 1, characterized in that: The outer wall of the retaining ring (55) is engaged with the inner wall of the end cap A (2), and it is pressed against the end face of the sealing sleeve (43) by the connecting nut (56).

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