Ball cage and vehicle

Abstract

The utility model provides a ball cage and a vehicle and relates to the technical field of vehicle transmission systems.The ball cage comprises a ball cage shell with an installation cavity and a universal joint assembly installed in the installation cavity, and the ball cage shell is provided with a first channel directly communicated with the installation cavity and a plugging piece located in the first channel; when the air pressure in the mounting cavity is larger than a set air pressure threshold value, the plugging piece can be driven to slide in the direction away from the mounting cavity in the axial direction of the first channel. According to the ball cage, the first channel is matched with the plugging piece, the air pressure in the mounting cavity can be automatically adjusted, when the air pressure is too high, the plugging piece can automatically slide to reduce the pressure in the mounting cavity, the air pressure can be reduced easily, damage to the ball cage due to too high air pressure can be effectively prevented through the design, and the service life of the ball cage is prolonged. Therefore, the reliability and the service life of the ball cage are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle transmission system technical field, especially a ball cage, and simultaneously, the utility model relates to the vehicle of applying the ball cage. BACKGROUND

[0002] Ball cage is also called constant velocity universal joint, and it is one of the most important components in automobile transmission system, which allows the rotation power to be smoothly transmitted within a certain angle range.

[0003] During the working process of the ball cage, the rotation will cause the temperature in the ball cage to rise, thereby causing the air pressure to increase, and the pressure difference will cause damage to the sealing element of the ball cage, which will affect the normal work of the ball cage. Therefore, in order to ensure the normal work of the ball cage, the damage caused by the increase of air pressure due to temperature change needs to be considered.

[0004] At present, the structure for balancing the internal air pressure of the ball cage universal joint in the market is to increase a labyrinth-shaped air passage on the rubber protective sleeve. This air pressure balancing structure is prone to cause the leakage of lubricating grease and the risk of water entering the ball cage. SUMMARY

[0005] Therefore, the utility model aims to provide a ball cage to ensure the safety and reliability of its application.

[0006] To achieve the above-mentioned purpose, the technical scheme of the utility model is as follows:

[0007] A ball cage comprises a ball cage shell having a mounting cavity, and a universal joint assembly mounted in the mounting cavity;

[0008] The ball cage shell is provided with a first channel communicating with the mounting cavity, and a sealing element located in the first channel;

[0009] When the air pressure in the mounting cavity is greater than a set air pressure threshold, the sealing element can be driven to slide along the first channel in the direction away from the mounting cavity.

[0010] Further, the ball cage shell is provided with a second channel communicating the first channel with the atmosphere, and when the sealing element slides to a preset position in the direction away from the mounting cavity, the second channel can communicate the mounting cavity through the first channel.

[0011] Further, the ball cage shell is provided with a sleeve, which can be sleeved on the shaft body connected with the universal joint assembly through insertion, and the sleeve and the first channel are located on the two sides of the ball cage shell.

[0012] Further, a sealing member is arranged between the blocking member and the side wall of the first channel, and is used to seal the gap between the blocking member and the side wall.

[0013] Further, one end of the first channel close to the mounting cavity is provided with a first limiting part, and the first limiting part is arranged on the first side of the blocking member to limit the limit position of the blocking member sliding towards the direction close to the mounting cavity.

[0014] Further, the other end of the first channel close to the mounting cavity is provided with a second limiting part, and the second limiting part is arranged on the second side of the blocking member to limit the limit position of the blocking member sliding away from the mounting cavity.

[0015] Further, a reset member is arranged between the blocking member and the ball cage shell, and the reset member is energized during the sliding of the blocking member away from the mounting cavity, and the reset member can drive the blocking member to reset after releasing energy.

[0016] Further, the reset member comprises a spring arranged in the first channel, and the spring is arranged on the side of the blocking member away from the mounting cavity, one end of the spring is arranged on the blocking member, and the other end of the spring is arranged on the ball cage shell.

[0017] Further, the ball cage shell comprises a shell with a plug-in hole and a bell-shaped shell partially inserted into the plug-in hole, and the shell and the bell-shaped shell form the mounting cavity.

[0018] Compared with the prior art, the utility model has the following advantages:

[0019] The ball cage can effectively prevent the leakage of lubricating grease in the ball cage, prevent external substances from entering the mounting cavity in the ball cage shell through the first channel, and automatically adjust the air pressure in the mounting cavity.

[0020] In addition, the arrangement of the second channel makes the air pressure adjustment function of the ball cage more perfect, and it can provide a direct discharge channel for the high-pressure gas in the mounting cavity to the atmosphere.

[0021] In addition, the sleeve is sleeved on the shaft body connected with the universal joint assembly, so that a stable connection structure for power transmission is provided. The sleeve and the first channel are arranged on two sides of the cage housing, so that the space of the cage housing can be fully utilized. This arrangement can avoid interference between the components, so that the structure inside the cage is more compact and orderly. At the same time, the reasonable space layout is also conducive to the installation of the cage in the vehicle transmission system, and can better adapt to the space requirements of different vehicle models.

[0022] In addition, the sealing element arranged between the blocking element and the side wall of the first channel can significantly improve the sealing performance of the cage. The sealing element can effectively prevent leakage of lubricating grease and invasion of external impurities, so as to provide a clean and stable working environment for the universal joint assembly, thereby reducing the wear of the components and prolonging the service life of the cage.

[0023] The first limiting part and the second limiting part can ensure that the sliding range of the blocking element is always within a reasonable range. The first limiting part can accurately limit the limit position of the blocking element sliding towards the installation cavity, so that the movement range of the blocking element is strictly controlled. The second limiting part can accurately limit the limit position of the blocking element sliding away from the installation cavity, so that the movement range of the blocking element is further strictly controlled, thereby ensuring the accuracy of the air pressure adjustment and sealing function of the cage. This is very important for the stable operation of the cage, and can ensure that the blocking element can accurately play a role under different air pressure conditions.

[0024] In addition, the reset element can greatly improve the stability of the air pressure adjustment of the cage. The sliding and resetting process of the blocking element is more controllable and regular, so that irregular movement of the blocking element due to air pressure fluctuations can be prevented. The cage can stably adjust the air pressure in the installation cavity under various working conditions and maintain normal working conditions.

[0025] The reset element is a spring, and the energy storage and release process is based on the elastic principle of the spring. This physical property is relatively stable and less affected by external factors. As long as the quality of the spring itself is reliable, the reset of the blocking element can be realized stably and repeatedly in the entire service life of the cage, which can reduce the failure of the cage caused by the failure of the blocking element to reset and improve the reliability of the cage.

[0026] Another purpose of the utility model is to provide a vehicle, the transmission shaft assembly of the vehicle comprises the cage as described above.

[0027] The vehicle described in the utility model is convenient for ensuring the safety and reliability of the transmission shaft assembly by applying the cage as described above, so as to be convenient for ensuring the safety and reliability of the vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0028] The accompanying drawings, which form a part of this patent, are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. In the drawings:

[0029] Figure 1 A structure schematic view in a ball cage application state of the embodiment one of the application;

[0030] Figure 2 A structure schematic view in another ball cage application state of the embodiment one of the application.

[0031] Legend of reference signs:

[0032] 1, ball cage shell; 2, shaft body; 3, universal joint assembly; 4, clamp; 5, plugging piece; 6, sealing piece; 7, protective sleeve; 8, reset piece;

[0033] 101, outer shell; 102, bell-shaped shell; 103, mounting cavity; 104, sleeve;

[0034] 1021, first channel; 1022, second channel; 1023, first limiting portion; 1024, second limiting portion;

[0035] 701, first sleeve; 702, second sleeve; 703, framework; 7011, flange. DETAILED DESCRIPTION

[0036] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0037] In the description of the present application, it should be noted that, based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, and not indicating or implying that the devices or elements indicated must have a particular orientation, structure and operation, therefore, it cannot be understood as a limitation of the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0038] In addition, in the description of the present application, unless otherwise explicitly limited, the terms "mounting", "connecting", "connection", "connecting piece" should be understood broadly. For example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood in combination with the specific circumstances.

[0039] The utility model discloses below will refer to the drawing and combine the embodiment to explain in detail.

[0040] Embodiment one

[0041] This embodiment relates to a ball cage, by improving the structure of ball cage shell, make it can better balance the pressure in the mounting cavity of ball cage shell, thereby guarantee the safety and reliability in the application process of ball cage.

[0042] Based on the above design idea, an exemplary structure of the ball cage of the embodiment is as shown in Figure 1 As a whole, the ball cage of the embodiment mainly includes a ball cage shell 1 with a mounting cavity 103, and a universal joint assembly 3 installed in the mounting cavity 103. Among them, the structure of the universal joint assembly 3 refers to the prior art, and the embodiment will not be described in detail.

[0043] In this embodiment, the ball cage shell 1 is provided with a first channel 1021 communicated with the mounting cavity 103, and a plugging piece 5 located in the first channel 1021, and when the air pressure in the mounting cavity 103 is greater than the set air pressure threshold, the plugging piece 5 can be driven to slide along the first channel 1021 in the axial direction away from the mounting cavity 103. It can be understood that such a design structure can drive the plugging piece 5 to slide along the first channel 1021 in the axial direction close to the mounting cavity 103 during the reduction of air pressure in the mounting cavity 103.

[0044] It should be noted that under normal air pressure, the plugging piece 5 can tightly block the first channel 1021, playing a good sealing effect, which not only prevents foreign matter from entering the mounting cavity 103, protecting the universal joint assembly 3 from contamination and damage, but also prevents the lubricating grease in the mounting cavity 103 from leaking, thereby ensuring the lubrication effect inside the ball cage and reducing the wear between parts.

[0045] When the air pressure in the mounting cavity 103 changes, the plugging piece 5 slides along the first channel 1021 in the axial direction, and the air pressure in the mounting cavity 103 can be adjusted. The whole air pressure adjustment process is relatively simple. The structure only includes the first channel 1021 and the plugging piece 5, without complex mechanical transmission or electronic control devices. Such a simple and compact structure design has lower manufacturing cost, is convenient for processing and manufacturing, has higher production efficiency, and is also convenient for installation and maintenance.

[0046] Since the sliding action of the plugging piece 5 is driven by air pressure, no additional power source is needed, so it has high reliability. In various harsh working environments, such as high temperature, high humidity, strong vibration, etc., it can work stably, which is beneficial to ensure the normal operation of the ball cage.

[0047] In actual installation, the first channel 1021 is directly molded onto the ball cage shell 1, integrating seamlessly with the overall structure of the ball cage without adding extra space. This integrated design enables the ball cage to achieve air pressure regulation within a limited space, thereby improving space utilization.

[0048] To improve the safety and reliability of air pressure regulation, such as Figure 2 As shown, in a preferred embodiment, the ball cage shell 1 is provided with a second channel 1022 that connects the first channel 1021 to the atmosphere. Initially, when the sliding member is positioned near the mounting cavity 103 within the first slide rail, the second channel 1022 and the mounting cavity 103 are not connected. However, if the gas pressure inside the mounting cavity 103 increases, and the sealing member 5 slides away from the mounting cavity 103 to a preset position, the second channel 1022 can connect to the mounting cavity 103 through the first channel 1021. At this time, refer to... Figure 2 The structure shown.

[0049] In the above structure, the setting of the second channel 1022 makes the air pressure regulation function of the ball cage more complete. It can provide a direct exhaust channel to the atmosphere for the high pressure gas in the mounting cavity 103. Compared with the structure that simply relies on the sliding adjustment of the sealing part 5 to regulate the air pressure, this structure can reduce the air pressure in the mounting cavity 103 more quickly and effectively, which is conducive to keeping the air pressure inside the ball cage within a safe and stable range.

[0050] By sliding the sealing component 5 within the first channel 1021, the ball cage can be flexibly switched between a sealed state and a ventilated state. Under normal circumstances, the sealing component 5 seals the first channel 1021, ensuring the airtightness of the ball cage. When the air pressure is too high, the sealing component 5 slides to a preset position, opening the communication path between the first channel 1021 and the second channel 1022, allowing ventilation and pressure reduction for the mounting cavity 103. This design ensures the airtightness of the ball cage during normal operation and allows for timely adjustment of air pressure when needed.

[0051] The second channel 1022 works in conjunction with the first channel 1021 to cleverly utilize the space of the ball cage shell 1, achieving air pressure regulation without increasing volume or complexity. This reasonable structural design allows the ball cage to have stronger performance within a limited space, improving the overall practicality and reliability of the ball cage.

[0052] Due to the significant changes in internal air pressure under different working environments and conditions, the presence of the second channel 1022 allows the ball cage to better adapt to these changes. Whether under high temperature, high speed, or frequent start-stop conditions, it can effectively maintain the stability of internal air pressure in the mounting cavity 103 by discharging high-pressure gas, thereby enhancing the ball cage's working ability in various harsh environments.

[0053] As a preferred embodiment, the sleeve 104 is arranged on the ball cage 1, and the sleeve 104 can be sleeved on the shaft 2 connected with the joint assembly 3, and the sleeve 104 and the first channel 1021 are arranged on two sides of the ball cage 1. Here, the sleeve 104 is arranged to be sleeved on the shaft 2 connected with the joint assembly 3, which can provide a stable connection structure for power transmission and facilitate the arrangement of the protective sleeve 7.

[0054] In specific implementation, the sleeve 104 and the first channel 1021 are arranged on two sides of the ball cage 1, so that the space of the ball cage 1 can be fully utilized, and such arrangement can avoid mutual interference between components, so that the structure inside the ball cage is more compact and orderly. At the same time, reasonable space arrangement is also conducive to the installation of the ball cage in the vehicle transmission system, and can better adapt to the space requirements of different vehicle models.

[0055] In addition, such structure design makes the installation and maintenance of the ball cage more convenient. During installation, since the positions of the sleeve 104 and the first channel 1021 are relatively independent, the operator can operate them respectively, thereby improving the installation efficiency. During maintenance, whether it is to check and lubricate the connection between the sleeve 104 and the shaft 2, or to repair and replace the first channel 1021 and the blocking piece 5, it can be performed separately, which can reduce the difficulty and cost of maintenance.

[0056] In order to better seal the gap between the sleeve 104 and the shaft 2, the protective sleeve 7 of the embodiment is made of rubber, and the longitudinal half view of the protective sleeve 7 is in the shape of “U”. During installation, most of the structure of the protective sleeve 7 can be embedded in the gap between the shaft 2 and the sleeve 104.

[0057] Specifically, the protective sleeve 7 has a first sleeve 701 abutting against the inner wall of the sleeve 104, and a second sleeve 702 sleeved outside the first sleeve 701, and one end of the first sleeve 701 and the second sleeve 702 is connected together.

[0058] The first sleeve 701 is in the shape of a cylinder, is inserted into the sleeve 104 in interference fit, and a clamping structure is arranged between the first sleeve 701 and the sleeve 104. In the embodiment, the clamping structure specifically includes a clamping groove arranged on the inner wall of the sleeve 104, and a clamping head arranged on the outer wall of the first sleeve 701, and the clamping head is clamped in the clamping groove, so that the protective sleeve 7 can be prevented from being separated from the sleeve 104.

[0059] At the other end of the first sleeve 701 relative to the end connected with the second sleeve 702, a flange 7011 is arranged, which abuts against the end of the sleeve 104 and can limit the installation position of the protective sleeve 7 within the gap between the sleeve 104 and the shaft 2. An "L"-shaped reinforcing frame 703 is arranged in the first sleeve 701 and the flange 7011, which is beneficial to improve the reliability of the connection between the first sleeve 701 and the sleeve 104.

[0060] At the other end of the second sleeve 104 relative to the end connected with the first sleeve 701 and the second sleeve 702, the other end is fastened to the shaft 2 by the clamp 4. In order to improve the connection reliability between the two, a groove is arranged on the shaft 2, and the clamp 4 is arranged at a position corresponding to the groove, so that the second sleeve 702 and the shaft 2 can be stably and reliably connected, and the connection position is not easy to move along the axial direction of the shaft 2, which can better ensure the sealing performance of the protective sleeve 7.

[0061] In order to improve the sealing reliability of the first channel 1021, still referring to Figure 2 As a preferred embodiment, a sealing member 6 is arranged between the plugging member 5 and the side wall of the first channel 1021, which is used to seal the gap between the plugging member 5 and the side wall.

[0062] In this structure, the sealing member 6 arranged between the plugging member 5 and the side wall of the first channel 1021 can significantly improve the sealing performance of the ball cage, which can effectively prevent the leakage of lubricating grease and the invasion of external impurities, and provide a clean and stable working environment for the universal joint assembly 3, thereby reducing the wear of parts and prolonging the service life of the ball cage.

[0063] Moreover, the structure of arranging the sealing member 6 between the plugging member 5 and the side wall of the first channel 1021 is relatively simple, and does not need complex mechanical devices or electronic control systems. As in the present embodiment, the side wall of the first channel 1021 is cylindrical, and the outer wall of the plugging member 5 is provided with a groove, and the sealing member 6 is preferably a sealing ring embedded in the groove.

[0064] It should be noted that, Figure 2 The structure shown is a schematic diagram taking a sealing ring as an example of multiple, such as two. When the sealing member 6 is multiple, such as three or four, the multiple sealing members 6 are arranged at intervals along the axial direction of the first channel 1021. It should be understood that the number of sealing rings can be one in addition to multiple.

[0065] As a preferred embodiment, the end of the first channel 1021 close to the installation cavity 103 is provided with a first limiting portion 1023, which is arranged at the first side of the plugging member 5 to limit the limit position of the sliding of the plugging member 5 towards the installation cavity 103.

[0066] The first limiting part 1023 in the arrangement can ensure that the sliding range of the plugging member 5 is within a reasonable range. The first limiting part 1023 can accurately define the limit position of the plugging member 5 sliding towards the installation cavity 103, so that the movement range of the plugging member 5 is strictly controlled, which is crucial for the stable operation of the ball cage. It can ensure that the plugging member 5 can accurately function under different air pressure conditions.

[0067] In terms of specific structure, the first limiting part 1023 is usually integrally formed with the ball cage shell 1. It is carefully designed in shape, which is generally annular and protrudes into the first channel 1021. This shape can uniformly distribute the pressure from the plugging member 5, ensuring the stability of the limiting effect.

[0068] In addition, the first limiting part 1023 can also be made of high-strength metal material separately and firmly installed at the position of the first channel 1021 close to the installation cavity 103. The connection can be detachable or non-detachable. In addition, the first limiting part 1023 can also be a plurality of bosses, and it is also feasible to arrange a plurality of bosses around the circumference of the first channel 1021.

[0069] It should be understood that when the ball cage is in a normal air pressure state or the air pressure decreases, the plugging member 5 will have a tendency to slide towards the installation cavity 103. At this time, the first limiting part 1023 will play a role. When the plugging member 5 slides to the limit position, the first limiting part 1023 will block the first side of the plugging member 5, preventing it from moving further towards the installation cavity 103.

[0070] The benefits of setting the first limiting part 1023 are that, on the one hand, it can ensure that the plugging member 5 effectively seals the first channel 1021 in the appropriate position, preventing the lubricating grease in the installation cavity 103 from leaking, and also preventing external impurities from entering the installation cavity 103 through the first channel 1021. On the other hand, it can also avoid the plugging member 5 from sliding too far into the installation cavity 103, preventing it from colliding with internal parts such as the universal joint assembly 3, thereby protecting the precise structure inside the ball cage and prolonging the service life of the ball cage.

[0071] Continuing to refer to Figure 2 As a preferred embodiment, the other end of the first channel 1021 close to the installation cavity 103 is provided with a second limiting part 1024. The second limiting part 1024 is preferably detachably installed on the ball cage shell 1, and the second limiting part 1024 is arranged on the second side of the plugging member 5 to define the limit position of the plugging member 5 sliding away from the installation cavity 103.

[0072] As in the present embodiment, the second limiting portion 1024 can accurately define the limit position of the sliding of the plugging member 5 away from the installation cavity 103, so that the movement range of the plugging member 5 is further strictly controlled, thereby ensuring the accuracy of the ball cage air pressure adjustment and sealing function.

[0073] In specific implementation, the second limiting portion 1024 is detachably mounted on the ball cage shell 1, facilitating the mounting and dismounting of the plugging member 5. More specifically, an annular groove is arranged on the inner wall of the first channel 1021, and the second limiting portion 1024 is specifically a retaining ring embedded in the groove, so as to prevent the plugging member 5 from disengaging from the first channel 1021 when the air pressure in the installation cavity 103 is relatively large. It should be understood that at least one of the first limiting portion 1023 and the second limiting portion 1024 is detachably mounted on the ball cage shell 1, so as to facilitate the mounting and dismounting of the plugging member 5.

[0074] Still referring to Figure 2 As a preferred embodiment, a reset member 8 is arranged between the plugging member 5 and the ball cage shell 1. During the sliding of the plugging member 5 away from the installation cavity 103, the reset member 8 stores energy, and the reset member 8 releases energy to drive the plugging member 5 to reset.

[0075] The reset member 8 arranged herein can greatly improve the stability of the air pressure adjustment of the ball cage. It makes the sliding and resetting process of the plugging member 5 more controllable and regular, thereby preventing the plugging member 5 from moving irregularly due to air pressure fluctuations, and ensuring that the ball cage can stably adjust the air pressure in the installation cavity 103 under various working conditions and maintain normal working state.

[0076] As in the present embodiment, the reset member 8 specifically includes a spring located in the first channel 1021, and the spring is specifically located on the side of the plugging member 5 away from the installation cavity 103. After installation, one end of the spring is placed on the plugging member 5, and the other end is placed on the ball cage shell 1. As in the present embodiment, the other end of the spring is placed on the limiting structure of the ball cage shell 1, such as the second limiting portion 1024 described above.

[0077] In the present embodiment, the reset member 8 adopts a spring, and the energy storage and release process is based on the elastic principle of the spring. This physical property is relatively stable and less affected by external factors. As long as the quality of the spring itself is reliable, the reset of the plugging member 5 can be stably achieved multiple times during the entire service life of the ball cage, which can reduce the ball cage failure caused by the failure of the plugging member 5 to reset and improve the reliability of the ball cage.

[0078] As a preferred embodiment, the ball cage shell 1 comprises a shell 101 with a plug-in hole, and a bell-shaped shell 102 partially inserted into the plug-in hole, the shell 101 and the bell-shaped shell 102 are welded together, and the shell 101 and the bell-shaped shell 102 are surrounded to form a mounting cavity 103. It should be noted that the shell 101 and the bell-shaped shell 102 can be connected by other means such as flanges, screws, etc. in addition to being welded together. The ball cage shell 1 comprises two parts, the shell 101 and the bell-shaped shell 102, which facilitates the assembly and disassembly of various parts.

[0079] In this embodiment, the mounting cavity 103 formed by the shell 101 and the bell-shaped shell 102 has good sealing performance, and the plug-in connection between the two can effectively prevent the intrusion of external impurities and the leakage of internal lubricating grease, and can provide a clean and stable working environment for the universal joint assembly 3, thereby prolonging the service life of the ball cage.

[0080] Specifically, one end of the bell-shaped shell 102 inserted into the shell 101 is open, and the first channel 1021, the blocking member 5, the sealing member 6, the reset member 8, and the mounting structure of the universal joint assembly 3 are all integrated on the bell-shaped shell 102, and the sleeve 104 is integrated on the shell 101, to facilitate overall arrangement.

[0081] The ball cage of this embodiment can effectively prevent the leakage of lubricating grease inside the ball cage and prevent external substances from entering the mounting cavity 103 inside the ball cage shell 1 through the first channel 1021, by the cooperation of the first channel 1021 and the blocking member 5. This structure can also automatically adjust the air pressure in the mounting cavity 103. When the air pressure is too high, the blocking member 5 will automatically slide to reduce the pressure in the mounting cavity 103, which is beneficial to reducing the air pressure. This design can effectively prevent damage to the ball cage caused by excessive air pressure, thereby improving the reliability and service life of the ball cage.

[0082] Embodiment two

[0083] This embodiment designs a vehicle, and the drive shaft assembly of the vehicle comprises the ball cage of embodiment one.

[0084] The vehicle of this embodiment, by applying the ball cage of embodiment one, is conducive to ensuring the safety and reliability of the drive shaft assembly, thereby facilitating the safety and reliability of the vehicle.

[0085] The above is only a preferred embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A ball cage, characterized in that: It includes a ball cage housing (1) having a mounting cavity (103) and a universal joint assembly (3) installed in the mounting cavity (103); The ball cage shell (1) is provided with a first channel (1021) communicating with the mounting cavity (103), and a sealing member (5) located in the first channel (1021); When the air pressure in the mounting cavity (103) is greater than the set air pressure threshold, the sealing member (5) can be driven to slide along the first channel (1021) in a direction away from the mounting cavity (103).

2. The ball cage according to claim 1, characterized in that: The ball cage housing (1) is provided with a second channel (1022) that connects the first channel (1021) and the atmosphere. When the sealing member (5) slides away from the mounting cavity (103) to a preset position, the second channel (1022) can connect to the mounting cavity (103) through the first channel (1021).

3. The ball cage according to claim 1, characterized in that: The ball cage housing (1) is provided with a sleeve (104), which can be fitted onto the shaft (2) that is connected to the universal joint assembly (3), and the sleeve (104) and the first channel (1021) are respectively placed on both sides of the ball cage housing (1).

4. The ball cage according to claim 2, characterized in that: A sealing element (6) is provided between the sealing element (5) and the side wall of the first channel (1021), and the sealing element (6) is used to seal the gap between the sealing element (5) and the side wall.

5. The ball cage according to claim 1, characterized in that: The first channel (1021) is provided with a first limiting part (1023) at one end near the mounting cavity (103). The first limiting part (1023) blocks the first side of the sealing member (5) to limit the extreme position of the sealing member (5) sliding towards the mounting cavity (103).

6. The ball cage according to claim 5, characterized in that: A second limiting part (1024) is provided at the other end of the first channel (1021) near the mounting cavity (103); The second limiting part (1024) is positioned on the second side of the sealing member (5) to limit the extreme position of the sealing member (5) sliding away from the mounting cavity (103).

7. The ball cage according to claim 1, characterized in that: A reset member (8) is provided between the sealing member (5) and the ball cage shell (1); As the sealing member (5) slides away from the mounting cavity (103), the reset member (8) stores energy; the reset member (8) releases energy, which can drive the sealing member (5) to reset.

8. The ball cage according to claim 7, characterized in that: The reset member (8) includes a spring located in the first channel (1021), and the spring is located on the side of the sealing member (5) facing away from the mounting cavity (103); One end of the spring rests on the sealing member (5), and the other end rests on the ball cage shell (1).

9. The ball cage according to any one of claims 1-8, characterized in that: The ball cage housing (1) includes an outer shell (101) with an insertion hole and a bell-shaped shell (102) partially inserted into the insertion hole, the outer shell (101) and the bell-shaped shell (102) forming the mounting cavity (103).

10. A vehicle, characterized in that: The driveshaft assembly of the vehicle includes a ball joint as described in any one of claims 1-9.

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