Drive shaft assembly with sealing arrangement

Abstract

The utility model relates to drive shaft field discloses a drive shaft assembly with sealing structure. Its including transmission shaft, outer ball cage and corrugated dust cover, corrugated dust cover one end is connected in the outside of outer ball cage, and the other end is set up on transmission shaft and is fixed in transmission shaft through first hoop binding, the inner wall interval fixed connection of corrugated dust cover has a plurality of dustproof rings, a plurality of dustproof rings interval arrangement along the axial direction of transmission shaft, and a plurality of dustproof rings are all set up on transmission shaft and with the outer wall of transmission shaft tight abutment and take place elastic bending deformation, the inner wall of corrugated dust cover still is fixed with the partition ring, and the partition ring is located in the range of first hoop, and the outer wall of transmission shaft is equipped with the sealing ring groove that the partition ring inserts, the utility model discloses the partition ring and a plurality of dustproof rings form multiple sealing structures, improve the sealing effect of corrugated dust cover and transmission shaft junction, and the sealing ring groove is processed on the thickening layer, guarantees the strength of transmission shaft itself.

Description

Technical Field

[0001] This utility model relates to the field of drive shaft technology, and more specifically, to a drive shaft assembly with a sealing structure. Background Technology

[0002] Existing automotive drive shaft assemblies include a driveshaft, an inner CV joint, and an outer CV joint. The inner and outer CV joints are connected to both ends of the driveshaft, respectively. To maintain lubrication inside the inner and outer CV joints, a corrugated dust cover is typically fitted and fixedly connected to the side of the outer CV joint closest to the inner CV joint. One end of the corrugated dust cover is fitted onto the driveshaft and secured with a clamp to form a seal, preventing dust from entering and affecting the lubrication of the outer CV joint. However, in the above technology, the end of the corrugated dust cover connected to the driveshaft is only secured with a clamp to form a single seal, resulting in a poor sealing effect at that end. Utility Model Content

[0003] To address at least one of the aforementioned problems, this utility model provides a drive shaft assembly with a sealing structure, comprising a drive shaft, an outer ball cage, and a corrugated dust cover. One end of the corrugated dust cover is sleeved and connected to the outside of the outer ball cage, and the other end is sleeved on the drive shaft and secured to the drive shaft by a first clamp. Multiple dust rings are fixedly connected at intervals on the inner wall of the corrugated dust cover. These multiple dust rings are arranged at intervals along the axial direction of the drive shaft, and each dust ring is sleeved on the drive shaft and tightly abuts against the outer peripheral wall of the drive shaft, undergoing elastic bending deformation. A partition ring is also fixedly provided on the inner wall of the corrugated dust cover, located within the range of the first clamp. A sealing ring groove is provided on the outer wall of the drive shaft for the partition ring to insert into.

[0004] Optionally, the dust ring is made of rubber.

[0005] Optionally, the cross-section of the partition ring is figure-eight shaped.

[0006] Optionally, a thickened layer is provided at the location where the sealing ring groove is provided on the drive shaft, and the sealing ring groove is formed on the thickened layer.

[0007] Optionally, the outer wall of the outer ball cage is provided with a partition ring groove, and the inner wall of the corrugated dust cover is provided with a partition protrusion inserted into the partition ring groove. The partition protrusion is made of elastic material, and the outer wall of the corrugated dust cover is fitted with a second clamp, with the partition protrusion located within the range of the second clamp.

[0008] Optionally, the end of the corrugated dust cover connected to the drive shaft is integrally formed with a first collar, the first clamp is sleeved on the first collar, and the partition ring is disposed on the inner wall of the first collar.

[0009] Optionally, the end of the first collar is circumferentially provided with a plurality of blocking protrusions that block the first clamp.

[0010] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0011] 1. The partition ring and multiple dustproof rings form a multi-seal structure. After the partition ring is inserted into the sealing ring groove, it deforms to form a partition after being clamped by the first clamp, thereby improving the sealing effect at the connection between the corrugated dust cover and the drive shaft, and effectively preventing dust from entering the outer ball cage from the end where the corrugated dust cover and the drive shaft are connected.

[0012] 2. All dustproof rings are in close contact with the outer peripheral wall of the drive shaft and undergo elastic bending deformation. Even if the outer ball cage drives the corresponding corrugated dustproof cover to bend and turn, the dustproof rings still have room to maintain a tight sealing relationship with the drive shaft.

[0013] 3. The partition ring with an "eight" shaped cross section forms two sealing partitions. When the partition ring is bound by the first clamp, it can bend outward and undergo elastic deformation. At the same time, it cooperates with the sealing ring groove to form a two-stage sealing structure, which further improves the sealing effect.

[0014] 4. A thickened layer is added at the connection between the drive shaft and the corrugated seal cover to increase the thickness of the corresponding position of the drive shaft. Then, a sealing ring groove is machined on the thickened layer to ensure the strength of the drive shaft itself. Attached Figure Description

[0015] Figure 1 This is a cross-sectional view of the drive shaft assembly in an embodiment of the present invention;

[0016] Figure 2 This is an exploded view of the drive shaft, outer ball cage, and corrugated dust cover in an embodiment of this utility model;

[0017] Figure 3 For Figure 1 Enlarged view of section A in the middle;

[0018] Figure 4 This is a perspective sectional view of the corrugated dust cover in an embodiment of the present invention.

[0019] Explanation of reference numerals in the attached drawings: 1. Drive shaft; 11. Sealing ring groove; 2. Outer ball cage; 21. Isolation ring groove; 3. Corrugated dust cover; 31. First ring; 32. Blocking protrusion; 33. Isolation ring; 34. Dustproof ring; 35. Isolation protrusion; 4. Inner ball cage; 5. First clamp; 6. Second clamp. Detailed Implementation

[0020] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the following description is provided in conjunction with the appendix. Figure 1-4This application will be described in further detail.

[0021] This utility model embodiment provides a drive shaft assembly with a sealing structure, see reference. Figure 1 The drive shaft assembly with a sealed structure includes a drive shaft 1, an outer CV joint 2, a corrugated dust cover 3, and an inner CV joint 4. The outer CV joint 2 and the inner CV joint 4 are respectively connected to both ends of the drive shaft 1. Two corrugated dust covers 3 are provided, and the two corrugated dust covers 3 have the same structure. The two corrugated dust covers 3 are connected to the outer CV joint 2 and the inner CV joint 4 to cover the adjacent ends of the outer CV joint 2 and the inner CV joint 4 to prevent dust from entering. The adjacent ends of the two corrugated dust covers 3 are both sleeved and connected to the drive shaft 1 to form a seal. The connection structure of the two corrugated dust covers 3 is the same. The following description uses the corrugated dust cover 3 connected to the outer CV joint 2 as an example to illustrate the connection structure and relationship.

[0022] Reference Figure 2 Since the outer diameters of both the outer ball cage 2 and the inner ball cage 4 are larger than those of the drive shaft 1, the corrugated dust cover 3 is bell-shaped. A first clamp 5 and a second clamp 6 are respectively fitted on both sides of the corrugated dust cover 3. The first clamp 5 is used to bind and fix the corrugated dust cover 3 to the drive shaft 1, while the second clamp 6 binds and fixes the corrugated dust cover 3 to the outer wall of the outer ball cage 2. A first collar 31 is integrally formed at the end of the corrugated dust cover 3 that connects to the drive shaft 1. The first clamp 5 is fitted onto the first collar 31, thereby increasing the sealing area between the corrugated dust cover 3 and the drive shaft 1 and improving the sealing effect. Multiple blocking protrusions 32 are integrally formed at circumferential intervals at the end of the first collar 31. The height of the blocking protrusions 32 is higher than the thickness of the first clamp 5, thus blocking the movement of the first clamp 5 along the axial direction of the drive shaft 1, making it difficult for the first clamp 5 to detach from the corrugated dust cover 3 due to vibration or shaking.

[0023] Reference Figure 2 and Figure 3 The drive shaft 1 and the corrugated dust cover 3 are integrally formed with a thickened layer, meaning the outer diameter of the mating area is larger than the outer diameter of other parts of the drive shaft 1. A sealing ring groove 11 is formed on the outer wall of the thickened layer. An isolation ring 33 is integrally formed on the inner wall of the first ring 31. The isolation ring 33 is inserted into the sealing ring groove 11 to form a barrier seal. Compared to a conventional corrugated dust cover 3 that is simply fitted onto the drive shaft 1, the barrier seal formed by the isolation ring 33 and the sealing ring groove 11 effectively improves the sealing effect, keeping dust out of the dust cover. The design of the sealing ring groove 11 within the thickened layer ensures the strength of the drive shaft 1 itself. The isolation ring 33, inserted into the sealing ring groove 11 and then secured by the first clamp 5, creates a mutual hook and constraint between the corrugated dust cover 3 and the drive shaft 1 along the axial direction of the drive shaft 1, preventing the corrugated dust cover 3 from moving along the axial direction of the drive shaft 1 and improving the stability of the corrugated dust cover 3 after installation.

[0024] The partition ring 33 has a cross-section in the shape of an "eight" and is located within the range of the first clamp 5. The partition ring 33 with the cross-section in the shape of an "eight" forms two sealing partitions. When the partition ring 33 is bound by the first clamp 5, it can bend outward and undergo elastic deformation. At the same time, it cooperates with the sealing ring groove 11 to form two partition sealing structures, which further improves the sealing effect.

[0025] Reference Figures 2 to 4 Three dustproof rings 34 are integrally formed on the inner wall of the corrugated dust cover 3, and the three dustproof rings 34 are arranged at intervals along the axial direction of the drive shaft 1. In another embodiment, more than three dustproof rings 34 can be provided. The dustproof rings 34 are made of rubber. All three dustproof rings 34 are sleeved on the drive shaft 1 and tightly abut against the outer peripheral wall of the drive shaft 1, undergoing elastic bending deformation. Even if the outer ball cage 2 drives the corresponding end of the corrugated dust cover 3 to bend and turn, the dustproof rings 34 still have a margin to maintain a tight sealing relationship with the drive shaft 1, thereby ensuring the sealing effect.

[0026] Reference Figures 1 to 4 Similarly, the structure of the corrugated dust cover 3 and the drive shaft 1 connected to the inner ball cage 4 is the same as the above technology.

[0027] The outer wall of the outer ball cage 2 is provided with a partition ring 33 groove 21, and the inner wall of the corrugated dust cover 3 is integrally formed with a partition protrusion 35 inserted into the partition ring 33 groove 21. The partition protrusion 35 is also made of rubber with elastic deformation capability. The partition protrusion 35 is located within the range of the second clamp 6. Thus, when the second clamp 6 is tightened, the second clamp 6 can directly apply force to the partition protrusion 35, so that the partition protrusion 35 is tightly engaged in the partition ring 33 groove 21 to form a seal, thereby improving the sealing effect. Similarly, the outer wall of the inner ball cage 4 is also provided with a partition ring 33 groove 21.

[0028] The implementation principle of a drive shaft assembly with a sealing structure in this application embodiment is as follows: the partition ring 33 and multiple dustproof rings 34 form a multi-layer sealing structure. After the partition ring 33 is inserted into the sealing ring groove 11, it deforms to form a partition after being clamped by the first clamp 5, thereby improving the sealing effect at the connection between the corrugated dustproof cover 3 and the drive shaft 1, effectively preventing dust from entering the outer spherical cage 2 from the end where the corrugated dustproof cover 3 and the drive shaft 1 are connected. The multiple dustproof rings 34 are all in close contact with the outer peripheral wall of the drive shaft 1 and undergo elastic bending deformation. Even if the outer spherical cage 2 drives the corresponding end of the corrugated dustproof cover 3 to bend and turn, the dustproof rings 34 still have a margin to maintain a tight sealing relationship with the drive shaft 1.

[0029] Similarly, the components included in the "components," "mechanisms," and "devices" of this disclosure can also be flexibly combined. They can be modularly produced according to actual needs and assembled as an independent module; or they can be assembled separately to form a module in this device. The division of the above-mentioned components in this disclosure is only one embodiment for ease of reading and is not intended to limit the scope of protection of this disclosure. Any technical solution that includes the above-mentioned components and has the same function should be understood as an equivalent technical solution of this disclosure.

[0030] In the description of this disclosure, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0031] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include at least one of that feature. In the description of this disclosure, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0032] In this disclosure, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0033] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0034] It should be noted that when a component is referred to as "fixed to," "set on," "fixed to," or "mounted on" another component, it can be directly on the other component or there may be an intervening component. When a component is considered to be "connected to another component," it can be directly connected to the other component or there may be an intervening component. Furthermore, when a component is considered to be "fixedly connected" to another component, the connection can be detachable or non-detachable, such as through socketing, snap-fitting, integral molding, welding, etc., which are achievable in conventional technologies and will not be elaborated upon here.

[0035] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0036] The above embodiments are merely illustrative of several implementation methods of this disclosure, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept of this disclosure, and these modifications and improvements all fall within the protection scope of this disclosure.

Claims

1. A drive shaft assembly with a sealing structure, characterized in that: The device includes a drive shaft (1), an outer ball cage (2), and a corrugated dust cover (3). One end of the corrugated dust cover (3) is fitted and connected to the outside of the outer ball cage (2), and the other end is fitted onto the drive shaft (1) and bound and fixed to the drive shaft (1) by a first clamp (5). Multiple dust rings (34) are fixedly connected at intervals on the inner wall of the corrugated dust cover (3). The multiple dust rings (34) are arranged at intervals along the axial direction of the drive shaft (1), and the multiple dust rings (34) are all fitted onto the drive shaft (1) and tightly abut against the outer peripheral wall of the drive shaft (1) to undergo elastic bending deformation. The inner wall of the corrugated dust cover (3) is also fixedly provided with a partition ring (33). The partition ring (33) is located within the range of the first clamp (5). The outer wall of the drive shaft (1) is provided with a sealing ring groove (11) for the partition ring (33) to be inserted.

2. The drive shaft assembly with a sealing structure according to claim 1, characterized in that: The dustproof ring (34) is made of rubber.

3. The drive shaft assembly with a sealing structure according to claim 1, characterized in that: The cross-section of the partition ring (33) is "eight" shaped.

4. The drive shaft assembly with a sealing structure according to claim 1, characterized in that: The transmission shaft (1) is provided with a thickened layer at the location of the sealing ring groove (11), and the sealing ring groove (11) is provided with the thickened layer.

5. The drive shaft assembly with a sealing structure according to claim 1, characterized in that: The outer wall of the outer ball cage (2) is provided with a partition ring (33) groove (21), and the inner wall of the corrugated dust cover (3) is provided with a partition protrusion (35) inserted into the partition ring (33) groove (21). The partition protrusion (35) is made of elastic material. The outer wall of the corrugated dust cover (3) is fitted with a second clamp (6), and the partition protrusion (35) is located within the range of the second clamp (6).

6. The drive shaft assembly with a sealing structure according to any one of claims 1-5, characterized in that: The corrugated dust cover (3) is integrally formed with a first collar (31) at one end connected to the drive shaft (1), the first clamp (5) is sleeved on the first collar (31), and the partition ring (33) is located on the inner wall of the first collar (31).

7. The drive shaft assembly with a sealing structure according to claim 6, characterized in that: The end of the first collar (31) is circumferentially fixed with a plurality of blocking protrusions (32) that block the first clamp (5).

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