A ball cage type universal joint with a dust cover

Abstract

The present application relates to a ball-and-cage universal joint with a dust cover, belonging to the technical field of automotive parts. It comprises a ball-and-cage universal joint body and a dust cover assembly. The ball-and-cage universal joint body is connected between the driving shaft and the driven shaft, and includes a bell-shaped housing connected to the driven shaft, with an annular groove provided on the outer wall of the bell-shaped housing. The dust cover assembly comprises a dust cover body, one end of which is fixed and connected to the driving shaft, and the other end is movable, with an inner slip ring rotatably connected to the annular groove of the bell-shaped housing. Even under adverse driving conditions, where the driving shaft and the driven shaft rotate asynchronously, the two ends of the dust cover body are not pulled separately. Instead, one end is completely fixed, while the other end has a certain amount of free movement to adapt to the overall structure under adverse driving conditions, thereby preventing the dust cover body from being pulled, thereby preventing distortion, deformation, and fatigue damage.

Description

Technical Field

[0001] The present application relates to the technical field of automobile parts, and in particular to a ball cage type universal joint with a dust cover. Background Art

[0002] Ball joints, also known as constant velocity joints, are important components in automotive transmission systems, particularly in the front drive axles of modern vehicles. They achieve constant velocity transmission in multiple directions through their internal spherical raceways and steel balls.

[0003] The dust cover is a key component in a ball-and-socket universal joint. Its primary function is to prevent dust from entering the cage and lubricating oil from escaping. Typically, the dust cover is secured to the driving and driven shafts at both ends to ensure effective dust protection.

[0004] However, in actual use, there is a certain angle between the driving shaft and the driven shaft. Under extreme driving conditions, the driving shaft and the driven shaft are prone to asynchronous rotation, and the two ends of the dust cover are fixed to the driving shaft and the driven shaft respectively, so the dust cover will be pulled, causing the dust cover to twist, deform and fatigue damage.

[0005] Once the dust cover is damaged, external water, sand and other debris will enter the ball cage inside the ball cage universal joint, causing abnormal wear and increase in the gap of the ball cage. In severe cases, it may even cause the ball cage to break, affecting the normal driving of the vehicle. Summary of the Invention

[0006] An embodiment of the present application provides a ball cage universal joint with a dust cover to solve the problem in the related art that the two ends of the dust cover are respectively fixed to the driving shaft and the driven shaft, which makes it easy to pull the dust cover under adverse driving conditions, causing the dust cover to twist, deform and fatigue damage.

[0007] The embodiment of the present application provides a ball cage universal joint with a dust cover, comprising:

[0008] A ball-and-cage universal joint body, the ball-and-cage universal joint body being connected between the driving shaft and the driven shaft, comprising a bell-shaped housing connected to the driven shaft, an annular groove being provided on the outer wall of the bell-shaped housing;

[0009] The dust cover assembly comprises a dust cover body, one end of the dust cover body is a fixed end connected to the driving shaft, and the other end is a movable end, and the movable end is provided with an inner slip ring rotatably connected to the annular groove of the bell housing.

[0010] In some embodiments, a plurality of protrusions are circumferentially spaced apart on the inner wall of the inner sliding ring, a plurality of recesses for accommodating the protrusions are circumferentially spaced apart on the annular groove, and the protrusions can slide in the recesses.

[0011] In some embodiments, the inner slip ring is a hoop, and the hoop has a hollow cylindrical structure.

[0012] In some embodiments, the dust cover assembly further comprises an outer band, which is circumferentially arranged on the outer wall of the dust cover body and is used to fix the band and the dust cover body into one body.

[0013] In some embodiments, protruding protrusions are arranged on the annular groove at intervals along the circumferential direction, and a plurality of protrusions are arranged on the inner wall of the inner sliding ring at intervals along the circumferential direction, and an accommodating space for accommodating the protrusions is formed between two adjacent protrusions, and the protrusions can slide in the accommodating space.

[0014] In some embodiments, the driving shaft and the end of the dust cover body away from the bell housing are fixed by a clamp.

[0015] In some embodiments, the cross section of the bump is tapered.

[0016] In some embodiments, arc-shaped chamfers are provided on the edges of the pit.

[0017] In some embodiments, the ball cage universal joint body further includes a ball cage and a steel ball seat disposed in the bell-shaped housing, and a plurality of steel balls rollingly connected between the ball cage and the steel ball seat.

[0018] In some embodiments, a compression spring is provided in the ball cage universal joint body, and the compression spring contacts the steel ball seat.

[0019] The beneficial effects of the technical solution provided by this application include:

[0020] An embodiment of the present application provides a ball cage universal joint with a dust cover, which includes a ball cage universal joint body and a dust cover assembly. The ball cage universal joint body is connected between the driving shaft and the driven shaft, and includes a bell-shaped shell connected to the driven shaft, and an annular groove is provided on the outer wall of the bell-shaped shell; the dust cover assembly includes a dust cover body, one end of the dust cover body is a fixed end and is connected to the driving shaft, and the other end is a movable end, and the movable end is provided with an inner slip ring that is rotatably connected to the annular groove of the bell-shaped shell.

[0021] In actual use, the ball-and-cage universal joint body is the main component of the entire device, connecting between the driving and driven shafts to achieve constant-speed transmission in multiple directions. The bell housing is part of the ball-and-cage universal joint body and is connected to the driven shaft. The outer wall of the bell housing is provided with an annular groove for connection to the movable end of the dust cover assembly. The dust cover assembly's primary function is to prevent dust from entering the ball-and-cage and prevent the lubricating oil within the ball-and-cage from escaping. It comprises a dust cover body, one end of which is fixed and connected to the driving shaft; the other end is a movable end equipped with an inner slip ring. The inner slip ring is rotatably connected to the annular groove of the bell housing, allowing the dust cover to have a certain degree of freedom at the movable end to accommodate changes in the angle between the driving and driven shafts. The two ends of the dust cover are not completely fixed to the driving shaft and the driven shaft, but are movably connected on one side of the dust cover body and the bell housing. In this way, even under poor driving conditions, the driving shaft and the driven shaft produce asynchronous rotation, and the two ends of the dust cover body will not be pulled separately. Instead, one end is completely fixed and the other end has a certain amount of free movement to adapt to the overall structure of the poor driving conditions, thereby avoiding pulling on the dust cover body and further avoiding distortion, deformation and fatigue damage of the dust cover body. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0023] Figure 1 An overall schematic diagram of a ball cage universal joint body and a dust cover assembly provided in an embodiment of the present application;

[0024] Figure 2 A schematic structural diagram of a dust cover assembly in one embodiment;

[0025] Figure 3 for Figure 2 Schematic diagram of the structure of the bell shell;

[0026] Figure 4 for Figure 2 Schematic diagram of the structure of the inner and outer slip rings;

[0027] Figure 5 Schematic diagram of the structure of the dust cover assembly in another embodiment.

[0028] Reference numerals:

[0029] 1. Ball-cage universal joint body; 2. Driving shaft; 3. Driven shaft; 4. Dust cover assembly; 11. Bell housing; 12. Ball cage; 13. Steel ball seat; 14. Steel ball; 15. Compression spring; 16. Star sleeve; 41. Dust cover body; 42. Inner sliding ring; 43. Outer hoop; 111. Annular groove; 421. Bump; 1111. Concave pit; 1112. Protrusion. DETAILED DESCRIPTION

[0030] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0031] An embodiment of the present application provides a ball cage universal joint with a dust cover, which can solve the problem in the related art that the two ends of the dust cover are respectively fixed to the driving shaft and the driven shaft, resulting in the dust cover being easily pulled under adverse driving conditions, causing the dust cover to be twisted, deformed and fatigued.

[0032] See also Figures 1 to 3 As shown, an embodiment of the present application provides a ball cage type universal joint with a dust cover, including a ball cage 12 type universal joint body 1 and a dust cover assembly 4, the ball cage 12 type universal joint body 1 is connected between the driving shaft 2 and the driven shaft 3, and includes a bell shell 11 connected to the driven shaft 3, and an annular groove 111 is provided on the outer wall of the bell shell 11; the dust cover assembly 4 includes a dust cover body 41, one end of the dust cover body 41 is a fixed end and is connected to the driving shaft 2, and the other end is a movable end, and the movable end is provided with an inner slip ring 42 that is rotatably connected to the annular groove 111 of the bell shell 11.

[0033] In actual use, the ball cage 12-type universal joint body 1 is the main part of the entire device, connected between the driving shaft 2 and the driven shaft 3, and realizes uniform speed transmission in multiple directions. The bell housing 11 is a part of the ball cage 12-type universal joint body 1, which is connected to the driven shaft 3. The outer wall of the bell housing 11 is provided with an annular groove 111 for connecting with the movable end of the dust cover assembly 4. The main function of the dust cover assembly 4 is to prevent dust from entering the ball cage 12 and to prevent the lubricating oil in the ball cage 12 from flowing out. It includes a dust cover body 41, one end of the dust cover body 41 is a fixed end, which is connected to the driving shaft 2; the other end is a movable end, which is provided with an inner slip ring 42. The inner slip ring 42 is rotatably connected to the annular groove 111 of the bell housing 11, thereby allowing the dust cover to have a certain degree of freedom at the movable end to adapt to the angle change between the driving shaft 2 and the driven shaft 3. The two ends of the dust cover are not completely fixed to the driving shaft 2 and the driven shaft 3, but are movably connected on one side of the dust cover body 41 and the bell housing 11. In this way, even under poor driving conditions, the driving shaft 2 and the driven shaft 3 produce asynchronous rotation, and the two ends of the dust cover body 41 will not be pulled separately, but one end is completely fixed and the other end has a certain amount of free movement to adapt to the overall structure of the poor driving conditions, thereby avoiding pulling on the dust cover body 41, and further avoiding distortion and fatigue damage of the dust cover body 41.

[0034] In some optional embodiments, such as Figures 2 to 4 As shown, a plurality of protrusions 421 are circumferentially spaced apart on the inner wall of the inner sliding ring 42 , and a plurality of recesses 1111 for accommodating the protrusions 421 are circumferentially spaced apart on the annular groove 111 , and the protrusions 421 can slide in the recesses 1111 .

[0035] The inner slip ring 42 is a key component of the movable end of the dust cover assembly 4. The provision of the inner slip ring 42 provides a certain rigidity to one side of the dust cover body 41. The inner slip ring 42 can rotate the dust cover body 41 along the annular groove 111 to a certain extent, thereby allowing the dust cover body 41 to have a certain degree of freedom at the movable end. The inner wall of the inner slip ring 42 is provided with a plurality of protrusions 421 at intervals along the circumferential direction. These protrusions 421 cooperate with the pits 1111 on the annular groove 111. The protrusions 421 can slide in the pits 1111, which can satisfy the dust cover body 41 at the movable end, that is, at the end where the bell-shaped shell 11 is located, and has a certain degree of sliding and rotation freedom. Moreover, the cooperation between the protrusions 421 of the inner slip ring 42 and the pits 1111 of the annular groove 111 can circumferentially limit the rotation amount of the inner slip ring 42, so that it has a certain amount of activity while not rotating too much, which can improve the tightness between the structures, prevent dust and other impurities from entering the dust cover, and improve its airtightness.

[0036] In some optional embodiments, the edges of recess 1111 are provided with curved chamfers. Recess 1111 is provided with curved chamfers. This curved chamfer design not only enhances the structural strength of the edges of recess 1111 but also effectively reduces stress concentration. During operation of the ball cage 12-type universal joint, the curved chamfers can better disperse and withstand forces and impacts from all directions, thereby further improving the pressure and impact resistance of the bell housing 11. Furthermore, the curved chamfers help reduce friction and wear between the bump 421 and recess 1111 during rotation, thereby extending the service life of the mechanism.

[0037] In some optional embodiments, the inner slip ring 42 is a band with a hollow cylindrical structure. As a key component of the movable end of the dust cover assembly 4, the inner slip ring 42 is in the form of a band and has a hollow cylindrical structure. When the inner slip ring 42 is secured to the dust cover body 41, it imparts a certain degree of rigidity to the dust cover body 41, enabling it to engage with the annular groove 111 of the bell housing 11 and achieve a certain degree of rotation.

[0038] In some optional embodiments, such as Figures 2 to 4 As shown, the dust cover assembly 4 also includes an outer band 43, which is circumferentially arranged on the outer wall of the dust cover body 41, and is used to fix the band and the dust cover body 41 into one. Specifically, the dust cover assembly 4 not only includes the dust cover body 41 and the inner slip ring 42, but is also provided with an outer band 43. The outer band 43 is arranged on the outer wall of the dust cover body 41 and is tightly surrounded along the circumference. The main function of the outer band 43 is to serve as a reinforcing element, which tightly fixes the inner slip ring 42 (the inner slip ring 42 exists in the form of a band here) and the dust cover body 41 together to form a unified and stable overall structure. Such a design not only improves the structural strength and stability of the dust cover assembly 4, but also effectively prevents loosening or falling off that may occur during use. In the embodiment equipped with the outer band 43 , the dust cover assembly 4 can more reliably protect the ball cage 12 type universal joint from external impurities, while ensuring its long-term durability and stability, and helping to prevent the dust cover assembly 4 from falling out of the annular groove 111 .

[0039] In some optional embodiments, such as Figure 5 As shown, protruding protrusions 1112 are arranged at intervals along the circumferential direction on the annular groove 111, and a plurality of protrusions 421 are arranged at intervals along the circumferential direction on the inner wall of the inner sliding ring 42, and an accommodating space for accommodating the protrusion 421 is formed between two adjacent protrusions 1112, and the protrusion 421 can slide in the accommodating space.

[0040] In this embodiment, the inner wall of the inner slip ring 42 is provided with a plurality of circumferentially spaced protrusions 421. These protrusions 421 do not engage with the recesses 1111 on the annular groove 111. Instead, protruding projections 1112 are provided circumferentially spaced on the annular groove 111. These projections 1112 not only enhance the structural strength of the annular groove 111 but also provide a precise sliding track for the inner slip ring 42. Multiple protrusions 421 are also provided circumferentially spaced on the inner wall of the inner slip ring 42. These protrusions 421 cooperate with the protrusions 1112 on the annular groove 111 to form a unique rotational connection structure. An accommodating space is formed between two adjacent protrusions 1112. The size and shape of this space are adapted to the protrusions 421 to ensure that it can precisely accommodate the protrusions 421 on the inner slip ring 42. With this design, projection 421 can slide freely within the accommodation space, providing a certain degree of sliding and rotational freedom for the movable end of dust cover assembly 4. However, this design does not easily cause dust intrusion due to excessive rotational freedom, thereby ensuring its dust-proof performance. This design not only ensures that dust cover assembly 4 fits tightly against the universal joint 12, but also allows it to rotate and slide flexibly with the rotation of the universal joint during vehicle operation, effectively preventing dust and other impurities from intruding into the interior of the CVJ 12.

[0041] In some optional embodiments, the cross-section of the bump 421 is conical. The conical cross-section here refers to a setting in which the longitudinal section is conical, while its cross-section is circular, and the diameter of the bump 421 changes continuously with the change of height. This setting enables the bump 421 to gradually adapt to and match the shape of the accommodating space or pit 1111 during the sliding process, thereby reducing friction and wear during sliding. This not only improves the service life of the dust cover assembly 4, but also ensures its stability and reliability during long-term use. When subjected to external pressure or impact, the bump 421 can better disperse and withstand these forces, thereby further enhancing the pressure resistance and impact resistance of the dust cover assembly 4. The conical design of the bump 421 not only improves the performance and life of the dust cover assembly 4, but also provides a strong guarantee for its stable operation under harsh working conditions.

[0042] In some optional embodiments, the driving shaft 2 and the end of the dust cover body 41 away from the bell housing 11 are fixed by a clamp. In order to ensure the stability and durability of the dust cover assembly 4 during the driving of the vehicle, the driving shaft 2 and the end of the dust cover body 41 away from the bell housing 11 are fixed by a clamp. As a commonly used connecting element, the clamp has the advantages of simple structure, easy installation, and firm connection. Here, the clamp tightly fixes the fixed end of the dust cover body 41 to the driving shaft 2, effectively preventing the dust cover assembly 4 from falling off or loosening due to vibration or impact during the driving of the vehicle, thereby ensuring its long-term stability and durability.

[0043] The other end is the movable end, equipped with an inner slip ring 42. The inner slip ring 42 is rotatably connected to the annular groove 111 of the bell housing 11, allowing the dust cover to have a certain degree of freedom at the movable end to adapt to the angular changes between the driving shaft 2 and the driven shaft 3. The ends of the dust cover are not completely fixed to the driving shaft 2 and the driven shaft 3. Instead, the dust cover body 41 is movably connected to one side of the bell housing 11. The dust cover body 41 is completely fixed to one side of the driving shaft 2. In this way, even if the driving shaft 2 and the driven shaft 3 produce asynchronous rotation under adverse driving conditions, the two ends of the dust cover body 41 will not be pulled separately. Instead, one end is completely fixed, and the other end has a certain amount of free movement to adapt to the overall structure of the adverse driving conditions. This can avoid pulling on the dust cover body 41 while ensuring the dustproof effect, and thus prevent the dust cover body 41 from twisting, deformation, and fatigue damage.

[0044] The ball cage type universal joint with a dust cover of the present application includes a ball cage 12 type universal joint body 1 and a dust cover assembly 4. The ball cage 12 type universal joint body 1 is connected between the driving shaft 2 and the driven shaft 3, and includes a bell shell 11 connected to the driven shaft 3, and an annular groove 111 is provided on the outer wall of the bell shell 11; the dust cover assembly 4 includes a dust cover body 41, one end of the dust cover body 41 is a fixed end and is connected to the driving shaft 2, and the other end is a movable end, and the movable end is provided with an inner slip ring 42 that is rotatably connected to the annular groove 111 of the bell shell 11.

[0045] In actual use, the ball cage 12-type universal joint body 1 is the main part of the entire device, connected between the driving shaft 2 and the driven shaft 3, and realizes uniform speed transmission in multiple directions. The bell housing 11 is a part of the ball cage 12-type universal joint body 1, which is connected to the driven shaft 3. The outer wall of the bell housing 11 is provided with an annular groove 111 for connecting with the movable end of the dust cover assembly 4. The main function of the dust cover assembly 4 is to prevent dust from entering the ball cage 12 and to prevent the lubricating oil in the ball cage 12 from flowing out. It includes a dust cover body 41, one end of the dust cover body 41 is a fixed end, which is connected to the driving shaft 2; the other end is a movable end, which is provided with an inner slip ring 42. The inner slip ring 42 is rotatably connected to the annular groove 111 of the bell housing 11, thereby allowing the dust cover to have a certain degree of freedom at the movable end to adapt to the angle change between the driving shaft 2 and the driven shaft 3. The two ends of the dust cover are not completely fixed to the driving shaft 2 and the driven shaft 3, but are movably connected on one side of the dust cover body 41 and the bell housing 11. In this way, even under poor driving conditions, the driving shaft 2 and the driven shaft 3 produce asynchronous rotation, and the two ends of the dust cover body 41 will not be pulled separately, but one end is completely fixed and the other end has a certain amount of free movement to adapt to the overall structure of the poor driving conditions, thereby avoiding pulling on the dust cover body 41, and further avoiding distortion and fatigue damage of the dust cover body 41.

[0046] The inner wall of the inner sliding ring 42 is provided with a plurality of protrusions 421 at intervals along the circumferential direction. The annular groove 111 is provided with a plurality of recesses 1111 at intervals along the circumferential direction for accommodating the protrusions 421 . The protrusions 421 can slide in the recesses 1111 .

[0047] The inner slip ring 42 is a key component of the movable end of the dust cover assembly 4. The provision of the inner slip ring 42 provides a certain rigidity to one side of the dust cover body 41. The inner slip ring 42 can rotate the dust cover body 41 along the annular groove 111 to a certain extent, thereby allowing the dust cover body 41 to have a certain degree of freedom at the movable end. The inner wall of the inner slip ring 42 is provided with a plurality of protrusions 421 at intervals along the circumferential direction. These protrusions 421 cooperate with the pits 1111 on the annular groove 111. The protrusions 421 can slide in the pits 1111, which can satisfy the requirement that the dust cover body 41 has a certain degree of sliding and rotation freedom at the movable end, that is, at the end where the bell-shaped shell 11 is located. Moreover, the cooperation between the protrusions 421 of the inner slip ring 42 and the pits 1111 of the annular groove 111 can circumferentially limit the rotation amount of the inner slip ring 42, so that it has a certain amount of activity while not rotating too much, and can improve the tightness between the structures, prevent dust and other impurities from entering the dust cover, and improve its airtightness.

[0048] In some optional embodiments, such as Figure 1 As shown, the ball cage 12 type universal joint body 1 further includes a ball cage 12 and a steel ball seat 13 arranged in the bell-shaped housing 11, and a plurality of steel balls 14 rollingly connected between the ball cage 12 and the steel ball seat 13.

[0049] In some optional embodiments, a compression spring 15 is provided in the ball cage 12 type universal joint body 1 , and the compression spring 15 contacts the steel ball seat 13 .

[0050] The 12-ball cage universal joint body 1 comprises not only a bell-shaped housing 11, but also a ball cage 12 and a steel ball seat 13 located within the bell-shaped housing 11. These two elements are connected in a rolling manner via multiple steel balls 14, forming a precise transmission structure. The steel balls 14 roll between the ball cage 12 and the steel ball seat 13, ensuring constant power transmission from the driving shaft 2 to the driven shaft 3. This significantly reduces friction and wear during the transmission process, improving transmission efficiency and service life. A compression spring 15 is also located within the 12-ball cage universal joint body 1. This compression spring 15 continuously applies a preload to the steel ball seat 13, ensuring a stable rolling connection between the ball cage 12 and the steel ball seat 13 and effectively absorbing vibrations and shocks generated during transmission, further enhancing the stability and durability of the universal joint. In actual use, a star-shaped sleeve 16 is also provided, which cooperates with the steel ball seat 13 to form the internal transmission and support structure of the universal joint. The design of the star-shaped sleeve 16 helps to better disperse and withstand the forces and impacts during the transmission process, thereby improving the overall performance and life of the universal joint.

[0051] In summary, the ball cage 12-type universal joint body 1 is a key component connecting the active shaft 2 and the driven shaft 3, and it can achieve uniform speed transmission in multiple directions. Among them, the bell-shaped shell 11, as a part of the body, is tightly connected to the driven shaft 3, and an annular groove 111 is specially provided on its outer wall for connecting with the movable end of the dust cover assembly 4. The main function of the dust cover assembly 4 is to prevent dust and other impurities from entering the interior of the ball cage 12, and at the same time prevent the lubricating oil in the ball cage 12 from flowing out. The assembly consists of a dust cover body 41 and an inner slip ring 42. One end of the dust cover body 41 is fixed in a position connected to the active shaft 2, while the other end is a movable end and is provided with an inner slip ring 42. This inner slip ring 42 is rotatably connected to the annular groove 111 of the bell-shaped shell 11, so that the dust cover has a certain degree of freedom at the movable end, so that it can adapt to the angle change between the active shaft 2 and the driven shaft 3.

[0052] Specifically, the inner wall of the inner slip ring 42 is provided with a plurality of protrusions 421 spaced circumferentially. These protrusions 421 engage with the recesses 1111 or protrusions 1112 on the annular groove 111, allowing the protrusions 421 to slide within the recesses 1111 or the accommodation space. This design not only satisfies the requirement for a certain degree of sliding and rotational freedom at the movable end of the dust cover body 41, but also effectively limits the rotation of the inner slip ring 42 through the engagement of the protrusions 421 with the recesses 1111 or protrusions 1112, preventing excessive rotation that could cause dust and other impurities to enter the dust cover, thereby improving its airtightness.

[0053] In addition, the dust cover assembly 4 further includes an outer band 43 , which is circumferentially arranged on the outer wall of the dust cover body 41 and is used to fix the inner slip ring 42 and the dust cover body 41 into one body, thereby enhancing the structural strength and stability of the dust cover assembly 4 .

[0054] In summary, this new design of a ball cage universal joint with a dust cover not only achieves constant velocity transmission in multiple directions, but also, through the effective design of the dust cover assembly 4, prevents dust and other impurities from entering the ball cage 12 and prevents the lubricating oil from escaping, thereby improving the service life and reliability of the universal joint. Furthermore, the dust cover has a certain degree of freedom at the movable end, allowing it to adapt to changes in the angle between the driving shaft 2 and the driven shaft 3, thus adapting to the overall structure under adverse driving conditions. This prevents strain on the dust cover body 41, thereby preventing distortion, deformation, and fatigue damage to the dust cover body 41.

[0055] In the description of this application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0056] It should be noted that, in this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0057] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A ball cage universal joint with a dust cover, characterized in that: include: A ball cage type universal joint body (1), the ball cage type universal joint body (1) is connected between a driving shaft (2) and a driven shaft (3), and comprises a bell-shaped housing (11) connected to the driven shaft (3), wherein an annular groove (111) is provided on the outer wall of the bell-shaped housing (11); A dust cover assembly (4), the dust cover assembly (4) comprising a dust cover body (41), one end of the dust cover body (41) being a fixed end connected to the driving shaft (2), and the other end being a movable end, the movable end being provided with an inner slip ring (42) rotatably connected to the annular groove (111) of the bell housing (11); The inner wall of the inner sliding ring (42) is provided with a plurality of protrusions (421) at intervals along the circumferential direction, and the annular groove (111) is provided with a plurality of recesses (1111) for accommodating the protrusions (421) at intervals along the circumferential direction, and the protrusions (421) can slide in the recesses (1111); The inner sliding ring (42) is a hoop, and the hoop is a hollow cylindrical structure; The dust cover assembly (4) further comprises an outer band (43), which is circumferentially arranged on the outer wall of the dust cover body (41) and is used to fix the band and the dust cover body (41) into one body.

2. A ball cage universal joint with a dust cover according to claim 1, characterized in that: The annular groove (111) is provided with protruding protrusions (1112) at intervals along the circumferential direction, the inner wall of the inner sliding ring (42) is provided with a plurality of protrusions (421) at intervals along the circumferential direction, and an accommodating space for accommodating the protrusions (421) is formed between two adjacent protrusions (1112), and the protrusions (421) can slide in the accommodating space.

3. A ball cage universal joint with a dust cover according to claim 1, characterized in that: The driving shaft (2) and the end of the dust cover body (41) away from the bell-shaped housing (11) are fixed by a clamp.

4. A ball cage universal joint with a dust cover as claimed in claim 2, characterized in that: The cross section of the protrusion (421) is conical.

5. A ball cage universal joint with a dust cover according to claim 1, characterized in that: Arc-shaped chamfers are provided on the edges of the concave pit (1111).

6. A ball cage universal joint with a dust cover according to claim 1, characterized in that: The ball cage universal joint body (1) further comprises a ball cage (12) and a steel ball seat (13) arranged in the bell-shaped housing (11), and a plurality of steel balls (14) rollingly connected between the ball cage (12) and the steel ball seat (13).

7. A ball cage universal joint with a dust cover as claimed in claim 6, characterized in that: A compression spring (15) is provided in the ball-cage universal joint body (1), and the compression spring (15) contacts the steel ball seat (13).

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