A ball cage universal joint

Abstract

The utility model relates to the field of universal joint discloses a ball cage universal joint. Its including bell housing and dust cover, dust cover elastic rubber material, and the one end of dust cover has the thimble of integral molding, and the one end of bell housing is inserted in the thimule and is closely abutted with thimule, and the outer wall of thimule detachably connected and inserted in the dust cover inside has filter core subassembly, and filter core subassembly is suitable for the dust filtration of air and is blocked, and the air inside and outside dust cover exchanges, and multiple layers meltblown cloth are stacked in filter core subassembly, and the one end of filter core subassembly located dust cover outside interval is equipped with multiple dust isolation micropore. The utility model discloses filter core subassembly can ensure that air passes under the action of filtering dust, and still reduces the power consumption of transmission mechanism under the condition of guaranteeing that dust cannot enter dust cover inside, and filter core subassembly has certain waterproofness, prevents the wetting of meltblown cloth after water enters the shell inside, and influences the filtering effect of meltblown cloth.

Description

Technical Field

[0001] This utility model relates to the field of universal joint technology, and more specifically, to a ball cage universal joint. Background Technology

[0002] A dust cover is typically fitted onto a ball joint to seal the drive shaft, protecting one side of the joint. The other end of the dust cover is attached to the drive shaft, preventing dust from entering the ball joint and affecting its lubrication. Since dust easily enters the ball joint through the connection between the dust cover and the drive shaft, existing dust covers are sealed to create a high level of airtightness. However, the end of the dust cover connected to the ball joint bends as the joint rotates. Because the high sealing performance at this connection creates a closed cavity, the ball joint must overcome the pressure difference inside the dust cover during rotation, increasing the power consumption of the transmission mechanism. Utility Model Content

[0003] To address at least one of the aforementioned problems, this utility model provides a ball cage universal joint, comprising a bell-shaped shell and a dust cover. The dust cover is made of elastic rubber, and one end of the dust cover is integrally formed with a collar. One end of the bell-shaped shell is inserted into the collar and tightly abuts against the collar. A filter element assembly is detachably connected to the outer wall of the collar and inserted inside the dust cover. The filter element assembly is suitable for filtering and blocking dust in the air and for exchanging air between the inside and outside of the dust cover. Multiple layers of meltblown fabric are stacked inside the filter element assembly, and the end of the filter element assembly located outside the dust cover has multiple micropores spaced apart to isolate dust.

[0004] Optionally, the collar is fitted with a clamp to tightly bind the collar to the bell-shaped shell.

[0005] Optionally, the inner wall of the collar is provided with a sealing protrusion, and the outer wall of the bell-shaped shell is provided with a sealing ring groove for the sealing protrusion to be inserted, wherein the sealing protrusion is located within the range of the clamp.

[0006] Optionally, the outer wall of the collar is provided with an assembly hole, which communicates with the inside of the collar. A threaded sleeve is inserted into the assembly hole, and the threaded sleeve is fixedly connected to the collar by potting glue. The filter element assembly is threadedly installed in the threaded sleeve.

[0007] Optionally, the outer wall of the threaded sleeve is provided with threads, and a first clamping nut and a second clamping nut are threadedly connected to the threaded sleeve. The first clamping nut and the second clamping nut are located on the inner and outer sides of the collar, respectively, and both are in close contact with the collar.

[0008] Optionally, the filter element assembly includes a top cover and a housing with one end open. The outer diameter of the top cover is larger than the outer diameter of the threaded sleeve. The micropores are provided on the top cover, and multiple micropores are located within the inner diameter range of the housing. The top cover blocks the opening of the housing, and the top cover and the housing are fixedly connected by potting adhesive. The meltblown fabric is disposed inside the housing, and the housing is inserted into the threaded sleeve. An arc groove communicating with the interior of the housing is opened at the end of the housing away from the top cover.

[0009] Optionally, the top cover has a circular groove on the side near the housing, the open end of the housing is inserted into the circular groove, the groove wall of the circular groove is threaded, and the end of the threaded sleeve located outside the collar is inserted into the circular groove and threadedly connected to the top cover.

[0010] Optionally, the second clamping nut is located outside the collar, and a sealing ring groove is provided on the side of the second clamping nut near the top cover. A sealing ring is provided in the sealing ring groove, and the end of the top cover near the second clamping nut abuts against the sealing ring.

[0011] Optionally, the housing is further filled with a resin-impregnated paper filter element, which is located on the side of the meltblown fabric near the top cover.

[0012] Optionally, the pore size of the micropores is 5μm-10μm.

[0013] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0014] 1. The sealing ring groove and sealing convex ring on the bell-shaped shell form a good sealing effect, making it difficult for dust to enter. The filter element assembly can ensure air passage while filtering dust. Therefore, after the dust cover deforms, the airflow inside the dust cover will be discharged through the filter element assembly under the action of air pressure. The filter element assembly will isolate the dust to the outside, thereby reducing the power consumption of the transmission mechanism while ensuring that dust cannot enter the dust cover.

[0015] 2. The filter element assembly has a certain degree of water resistance. The micropore design can effectively prevent liquid from entering the housing. At the same time, the resin-impregnated paper filter element can not only filter dust, but also act as a second layer of waterproofing to prevent water from entering the housing and wetting the meltblown cloth, thus affecting the filtration effect of the meltblown cloth.

[0016] 3. Because the filter element assembly may become clogged or saturated, the filter element assembly and dust cover are designed to be detachable for easy replacement during maintenance;

[0017] 4. When installing the threaded sleeve, the hot adhesive has good fluidity and can penetrate more perfectly into the tiny gaps between the threaded sleeve and the assembly hole to form a seal. After the adhesive solidifies, it fixes the threaded sleeve and the dust cover. At the same time, the first clamping nut and the second clamping nut work together to form a double fixing structure, which improves the stability and sealing of the threaded sleeve after assembly. Attached Figure Description

[0018] Figure 1 This is a cross-sectional view of the ball cage universal joint in an embodiment of this utility model;

[0019] Figure 2 for Figure 1 Enlarged view of section A in the middle;

[0020] Figure 3 This is an exploded view of the filter element assembly in an embodiment of this utility model;

[0021] Figure 4 This is a perspective sectional view of the filter element assembly in an embodiment of this utility model.

[0022] Explanation of reference numerals in the attached drawings: 1. Bell-shaped shell; 11. Sealing ring groove; 2. Dust cover; 21. Collar; 22. Clamp; 23. Sealing convex ring; 24. Threaded sleeve; 25. First clamping nut; 26. Second clamping nut; 27. Sealing ring; 3. Filter element assembly; 31. Top cover; 32. Shell; 33. Micropores; 34. Meltblown fabric; 35. Resin-impregnated paper filter element. Detailed Implementation

[0023] 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 1-4 This application will be described in further detail.

[0024] This utility model embodiment provides a ball cage universal joint, referring to... Figure 1The ball joint includes a bell-shaped shell 1 and a dust cover 2. The dust cover 2 is made of elastic rubber, and one end of the dust cover 2 has an integrally formed collar 21. One end of the bell-shaped shell 1 is inserted into the collar 21 and tightly abuts against the collar 21. A filter element assembly 3 is detachably connected to the outer wall of the collar 21 and inserted inside the dust cover 2. The filter element assembly 3 is suitable for filtering and blocking dust in the air and allows for air exchange between the inside and outside of the dust cover 2. When the dust cover 2 has a high sealing effect at both ends after installation, after the dust cover 2 deforms, the airflow inside the dust cover 2 will be discharged through the filter element assembly 3 under air pressure. The filter element assembly 3 will isolate dust from the outside, thus ensuring that dust cannot enter the dust cover 2 and reducing the power consumption of the transmission mechanism.

[0025] Reference Figure 1 and Figure 2 A clamp 22 is fitted onto the collar 21 to tightly bind the collar 21 to the bell-shaped shell 1. A sealing protrusion 23 is integrally formed on the inner wall of the collar 21. A sealing ring groove 11 is formed on the outer wall of the bell-shaped shell 1 for the sealing protrusion 23 to be inserted. The sealing protrusion 23 is located within the range of the clamp 22. When the clamp 22 is tightened, the sealing protrusion 23 will undergo elastic deformation due to pressure against the groove wall and bottom of the sealing ring groove 11, thus forming a barrier. This greatly improves airtightness and effectively prevents dust from entering the dust cover 2 from the end connected to the bell-shaped shell 1.

[0026] Multiple filter element assemblies 3 can be arranged circumferentially on the outer peripheral wall of the collar 21 as required. Each filter element assembly 3 has the same installation structure. The following description uses the installation structure of one filter element assembly 3 as an example.

[0027] Reference Figures 2 to 4 The outer wall of the collar 21 has an assembly hole that communicates with the interior of the collar 21. A threaded sleeve 24 is inserted into the assembly hole, with one end of the threaded sleeve 24 extending to the outside of the collar 21 and the other end extending to the inside of the collar 21. Both the inner and outer walls of the threaded sleeve 24 are threaded. The threaded sleeve 24 is fixedly connected to the sleeve by applying adhesive (hot adhesive is poured into the threaded sleeve 24 through a tool; the hot adhesive has good fluidity and can penetrate more perfectly into the tiny gap between the threaded sleeve 24 and the assembly hole to form a seal; after the adhesive solidifies, the threaded sleeve 24 and the dust cover 2 are fixedly connected) and the filter element assembly 3 is threadedly installed inside the threaded sleeve 24. Because the filter element assembly 3 may become clogged or saturated, the filter element assembly 3 and the dust cover 2 are designed as a detachable structure for easy replacement during vehicle maintenance.

[0028] The threaded sleeve 24 is threadedly fitted with a first clamping nut 25 and a second clamping nut 26. The first clamping nut 25 and the second clamping nut are located on the inner and outer sides of the collar 21, respectively, and both are in close contact with the collar 21. After the threaded sleeve 24 is fixed in place with adhesive, the first clamping nut 25 and the second clamping nut 26 cooperate to form a double fixing structure, improving the stability of the threaded sleeve 24 after assembly. After the first clamping nut 25 and the second clamping nut 26 are in close contact with the collar 21, they have an elastic thrust along the axial direction of the threaded sleeve 24, making it difficult for the first clamping nut 25 and the second clamping nut 26 to loosen.

[0029] Reference Figures 2 to 4 The filter element assembly 3 includes a top cover 31 and a housing 32 with one open end. The outer diameter of the top cover 31 is larger than the outer diameter of the threaded sleeve 24. The top cover 31 is located at one end outside the dust cover 2. The top cover 31 is provided with a plurality of micropores 33 for dust isolation at intervals. The micropores 33 are all located within the inner diameter range of the housing 32. The pore size of the micropores 33 is 5μm-10μm. In this embodiment, the pore size of the micropores 33 is preferably 7μm, which can effectively filter and block dust in the air. At the same time, water also needs a certain pressure to pass through the micropores 33 and enter the housing 32, so the top cover 31 also plays a certain role in waterproofing. The top cover 31 covers the opening of the housing 32.

[0030] An arc groove communicating with the interior of the housing 32 is provided at the end of the housing 32 away from the top cover 31. Multiple arc grooves are spaced apart along the circumference of the housing 32, thereby increasing airflow. Multiple layers of meltblown fabric 34 are tightly packed inside the housing 32. The ultra-fine fiber structure of the meltblown fabric 34 can effectively intercept tiny particles (such as dust, bacteria, and viruses), with a filtration efficiency typically exceeding 95%. Its high-voltage electret electrostatic treatment further enhances its adsorption capacity, achieving both low resistance and high dust holding capacity. The housing 32 is also filled with a resin-impregnated paper filter element 35, located on the side of the meltblown fabric 34 closest to the top cover 31. The resin-impregnated paper filter element 35 has a filtration efficiency of up to 99.5%, effectively blocking dust and other tiny particles. Simultaneously, the resin-impregnated paper filter element 35, through a resin impregnation process, also possesses a certain degree of water resistance, acting as a second layer of waterproofing. However, it allows air to pass through, preventing water from entering the interior of the housing 32 and wetting the meltblown fabric 34, thus affecting its filtration effect.

[0031] Reference Figures 2 to 4The top cover 31 has a circular groove on the side near the housing 32. The open end of the housing 32 is inserted into the circular groove. The top cover 31 and the housing 32 are sealed and fixed together by potting glue, thereby improving the sealing and firmness of the connection between the top cover 31 and the housing 32. The housing 32 is threadedly inserted into the threaded sleeve 24. The groove wall of the circular groove is threaded. The end of the threaded sleeve 24 located outside the collar 21 is inserted into the circular groove and threadedly connected to the top cover 31, thereby forming a double threaded connection structure, which improves the stability after installation. The second clamping nut is located outside the collar 21. The side of the second clamping nut near the top cover 31 has a sealing ring groove. A sealing ring 27 is provided in the sealing ring groove 11. The end of the top cover 31 near the second clamping nut is pressed against the sealing ring 27. On the one hand, the top cover 31 presses against the sealing ring 27 to achieve a sealing effect. On the other hand, the top cover 31 is subjected to elastic force along its own axial direction under the elastic deformation of the sealing ring 27, making the top cover 31 less prone to loosening.

[0032] The implementation principle of a ball cage universal joint in this application embodiment is as follows: the sealing ring groove 11 and sealing convex ring 23 on the bell-shaped shell 1 form a good sealing effect, making it difficult for dust to enter. The filter element assembly 3 can ensure air passage under the action of filtering dust. Therefore, after the dust cover 2 is deformed, the airflow inside the dust cover 2 will be discharged through the filter element assembly 3 under the action of air pressure. The filter element assembly 3 will isolate the dust to the outside, thereby reducing the power consumption of the transmission mechanism while ensuring that dust cannot enter the dust cover 2.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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 ball cage universal joint, characterized in that: The dust cover (2) includes a bell-shaped shell (1) and a dust cover (2). The dust cover (2) is made of elastic rubber. One end of the dust cover (2) is integrally formed with a collar (21). One end of the bell-shaped shell (1) is inserted into the collar (21) and tightly abuts against the collar (21). The outer wall of the collar (21) is detachably connected to a filter element assembly (3) inserted inside the dust cover (2). The filter element assembly (3) is suitable for filtering and blocking dust in the air and for exchanging air between the inside and outside of the dust cover (2). Multiple layers of meltblown fabric (34) are stacked inside the filter element assembly (3). The end of the filter element assembly (3) located outside the dust cover (2) is provided with multiple micropores (33) to isolate dust.

2. The ball cage universal joint according to claim 1, characterized in that: The collar (21) is fitted with a clamp (22) that tightly binds the collar (21) to the bell-shaped shell (1).

3. The ball cage universal joint according to claim 2, characterized in that: The inner wall of the collar (21) is provided with a sealing protrusion (23), and the outer wall of the bell-shaped shell (1) is provided with a sealing ring groove (11) for the sealing protrusion (23) to be inserted. The sealing protrusion (23) is located within the range of the clamp (22).

4. The ball cage universal joint according to claim 1, characterized in that: The outer wall of the collar (21) is provided with an assembly hole, which is connected to the inside of the collar (21). A threaded sleeve (24) is inserted into the assembly hole. The threaded sleeve (24) is fixedly connected to the collar (21) by potting glue. The filter element assembly (3) is threadedly installed in the threaded sleeve (24).

5. The ball cage universal joint according to claim 4, characterized in that: The outer wall of the threaded sleeve (24) is threaded, and a first clamping nut (25) and a second clamping nut (26) are threadedly connected to the threaded sleeve (24). The first clamping nut (25) and the second clamping nut (26) are located on the inner and outer sides of the collar (21) respectively, and both are in close contact with the collar (21).

6. The ball cage universal joint according to claim 5, characterized in that: The filter element assembly (3) includes a top cover (31) and a housing (32) with one end open. The outer diameter of the top cover (31) is larger than the outer diameter of the threaded sleeve (24). The micropores (33) are provided on the top cover (31), and multiple micropores (33) are located within the inner diameter range of the housing (32). The top cover (31) covers the opening of the housing (32), and the top cover (31) and the housing (32) are fixedly connected by potting glue. The meltblown cloth (34) is provided inside the housing (32). The housing (32) is inserted into the threaded sleeve (24). The end of the housing (32) away from the top cover (31) has an arc groove that communicates with the inside of the housing (32).

7. The ball cage universal joint according to claim 6, characterized in that: The top cover (31) has a circular groove on the side near the housing (32). The open end of the housing (32) is inserted into the circular groove. The groove wall of the circular groove is threaded. The threaded sleeve (24) is inserted into the circular groove at one end outside the collar (21) and is threadedly connected to the top cover (31).

8. The ball cage universal joint according to claim 6, characterized in that: The second clamping nut is located outside the collar (21). The second clamping nut (26) has a sealing ring groove (11) on the side near the top cover (31). A sealing ring (27) is provided in the sealing ring groove (11). The end of the top cover (31) near the second clamping nut (26) abuts against the sealing ring (27).

9. The ball cage universal joint according to claim 6, characterized in that: The housing (32) is also filled with a resin-impregnated paper filter element (35), which is located on the side of the meltblown fabric (34) near the top cover (31).

10. The ball cage universal joint according to claim 1, characterized in that: The pore size of the micropore (33) is 5μm-10μm.

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