Sliding type inner ball cage

Abstract

The utility model relates to the technical field of inner spherical cages, and discloses a sliding type inner spherical cage which comprises an inner spherical cage body, a retainer is arranged outside the inner spherical cage body, an outer spherical shell is arranged outside the retainer, a protective cover is arranged outside the outer spherical shell, a plurality of steel balls are arranged on the outer wall of the inner spherical cage body and the inner wall of the outer spherical shell, and the steel balls are arranged on the outer wall of the inner spherical cage body and the inner wall of the outer spherical shell. Slideways are formed in the outer wall of the inner spherical cage and the inner wall of the outer spherical shell, the outer walls of the steel balls are clamped with the outer wall of the inner spherical cage and the inner wall of the outer spherical shell in a rolling manner, the outer wall of the retainer is clamped and matched with the inner wall of the outer spherical shell, and the multiple steel balls are arranged in corresponding grooves in the inner wall of the retainer. According to the utility model, the slideways on the inner walls of the inner ball cage and the outer ball shell are matched with the steel balls, so that the steel balls not only can transmit power, but also can flexibly slide in the slideways, and even if the driving shaft generates axial displacement due to bumping of a road surface, transmission blockage cannot occur.

Description

Technical Field

[0001] This utility model relates to the field of inner ball cage technology, and in particular to a sliding inner ball cage. Background Technology

[0002] The inner CV joint is one of the core components of the universal joint in an automotive transmission system. Its design stems from addressing the power transmission needs of vehicles under complex road conditions. During vehicle operation, the drive shaft needs to simultaneously meet the requirements of steering and axial displacement (such as road bumps and suspension movement). Rigid transmission structures are not well-suited to adapting to these dynamic changes, easily leading to transmission failure or component damage. Therefore, transmission structures represented by CV joints have emerged. The inner CV joint, as a key component, achieves smooth power transmission under different angles and axial displacements through its cooperation with the outer CV shell, steel balls, and cage. However, the steel balls in most inner CV joint structures typically only roll within fixed tracks, making it difficult to adapt to the axial expansion and contraction of the drive shaft under complex road conditions. When the drive shaft experiences axial displacement due to road bumps or suspension movement, transmission jamming or even component damage can easily occur, affecting the continuity of power transmission.

[0003] Therefore, those skilled in the art have provided a sliding inner ball cage to solve the problems mentioned in the background art. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a sliding inner ball cage. The inner ball cage and the sliding track on the inner wall of the outer ball shell cooperate with the steel ball, so that the steel ball can not only transmit power, but also slide flexibly in the sliding track. Even if the drive shaft is axially displaced due to road bumps, there will be no transmission jamming.

[0005] To achieve the above objectives, this utility model provides the following technical solution;

[0006] A sliding inner ball cage includes an inner ball cage, a retainer is provided on the outside of the inner ball cage, an outer ball shell is provided on the outside of the retainer, a protective cover is provided on the outside of the outer ball shell, and a plurality of steel balls are provided on the outer wall of the inner ball cage and the inner wall of the outer ball shell.

[0007] The above technical solution forms a multi-layered nested transmission structure. The inner ball cage and the outer ball shell transmit power through steel balls. The cage ensures the stable distribution of the steel balls, and the protective cover provides external protection. The overall structure is compact and highly efficient, and can adapt to angle changes and axial displacement under complex working conditions, avoiding transmission failure caused by loose components.

[0008] Furthermore, both the outer wall of the inner ball cage and the inner wall of the outer ball shell are provided with sliding tracks, and the outer wall of the steel ball is rolled and engaged with the outer wall of the inner ball cage and the inner wall of the outer ball shell.

[0009] Through the above technical solution, the slide provides a motion trajectory for the steel ball, allowing the steel ball to slide flexibly along the axial direction while transmitting torque, effectively compensating for the axial expansion and contraction of the drive shaft, avoiding the jamming phenomenon caused by the structure being restricted by axial displacement, and improving the reliability and durability of the transmission system.

[0010] Furthermore, the outer wall of the cage is engaged with the inner wall of the outer spherical shell, and the multiple steel balls are disposed in the corresponding grooves on the inner wall of the cage;

[0011] Through the above technical solution, the cage positions and evenly distributes the steel balls, preventing them from shifting or colliding under high-speed operation or complex working conditions. At the same time, the snap-fit ​​between the cage and the outer shell enhances the overall structural rigidity, improves impact resistance, and extends the service life of the components.

[0012] Furthermore, the inner wall of the protective cover is fixed to the outer wall of the outer spherical shell, and a connecting shaft is fixedly connected to the end of the protective cover and the outer wall of the inner spherical cage away from the cage;

[0013] Through the above technical solutions, the protective cover forms a closed cavity, effectively blocking the intrusion of dust and mud, preventing grease leakage, extending the life of internal parts, making overall installation more convenient, and the compact design saves space.

[0014] This utility model has the following beneficial effects:

[0015] This utility model proposes a sliding inner ball cage, in which the inner ball cage and the inner wall of the outer ball shell cooperate with the steel ball in a sliding track. This allows the steel ball to not only transmit power but also slide flexibly within the track. Even if the drive shaft experiences axial displacement due to road bumps, there will be no transmission jamming. The retainer firmly fixes the steel ball in the corresponding groove and engages with the outer ball shell, ensuring that the steel ball maintains a stable distance during movement, making power transmission smooth and reliable. The protective cover tightly wraps around the outer ball shell, and the connecting shafts at both ends securely transmit power. This not only prevents dust and mud from entering but also prevents grease leakage, extending the service life of internal parts. The overall structure is compact, requiring no additional complex components, saving space and facilitating installation and maintenance. It can easily adapt to the complex working conditions of various scenarios such as automobiles and construction machinery. Attached Figure Description

[0016] Figure 1 This is an isometric view of a sliding inner ball cage proposed in this utility model;

[0017] Figure 2 This is an exploded view of a sliding inner ball cage proposed in this utility model;

[0018] Figure 3 This is a schematic diagram of the structure of a sliding inner ball cage proposed in this utility model;

[0019] Figure 4 This is an exploded view of a partial structure of a sliding inner ball cage proposed in this utility model.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. Inner ball cage; 2. Steel ball; 3. Connecting shaft; 4. Outer ball shell; 5. Cage; 6. Slide rail; 7. Protective cover. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of specific embodiments. Obviously, the described specific embodiments are only a part of the specific embodiments of the present invention, and not all of them. Based on the specific embodiments of the present invention, all other specific embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Reference Figure 1-4 This utility model provides a specific implementation method:

[0024] A sliding inner ball cage includes an inner ball cage 1, a retainer 5 is provided on the outside of the inner ball cage 1, an outer ball shell 4 is provided on the outside of the retainer 5, a protective cover 7 is provided on the outside of the outer ball shell 4, and a plurality of steel balls 2 are provided on the outer wall of the inner ball cage 1 and the inner wall of the outer ball shell 4.

[0025] A multi-layered nested transmission structure is formed. The inner ball cage 1 and the outer ball shell 4 achieve power transmission through steel balls 2. The cage 5 ensures the stable distribution of steel balls 2. The protective cover 7 provides external protection. The overall structure is compact and highly efficient, and can adapt to angle changes and axial displacement under complex working conditions, avoiding transmission failure caused by loose components.

[0026] The outer wall of the inner ball cage 1 and the inner wall of the outer ball shell 4 are both provided with slide rails 6. The outer wall of the steel ball 2 rolls and engages with the outer wall of the inner ball cage 1 and the inner wall of the outer ball shell 4. The slide rails 6 provide a movement trajectory for the steel ball 2, allowing the steel ball 2 to slide flexibly along the axial direction while transmitting torque. This effectively compensates for the axial expansion and contraction of the drive shaft, avoids jamming caused by the structure being restricted by axial displacement, and improves the reliability and durability of the transmission system.

[0027] The outer wall of the cage 5 is engaged with the inner wall of the outer spherical shell 4. Multiple steel balls 2 are arranged in corresponding grooves on the inner wall of the cage 5. The cage 5 positions and evenly distributes the steel balls 2, preventing them from shifting or colliding under high-speed operation or complex working conditions. At the same time, the engagement between the cage 5 and the outer spherical shell 4 enhances the overall structural rigidity, improves impact resistance, and extends the service life of the components. The inner wall of the protective cover 7 is fixed to the outer wall of the outer spherical shell 4. The protective cover 7 and the outer wall of the inner ball cage 1, at the end away from the cage 5, are both fixedly connected to a connecting shaft 3. The protective cover 7 forms a closed cavity, effectively blocking dust and mud from entering, preventing grease leakage, extending the service life of internal parts, making overall installation more convenient, and the compact design saves space.

[0028] Working principle: When the drive shaft inputs power to the inner ball cage 1 through the connecting shaft 3, the slide rail 6 on the outer wall of the inner ball cage 1 pushes the steel ball 2 to roll. The steel ball 2 then transmits torque to the outer ball shell 4 through the slide rail 6 on the inner wall of the outer ball shell 4. Finally, the outer ball shell 4 outputs power through the connecting shaft 3 at the other end. During this process, the slide rail 6 engages with the rolling of the steel ball 2, allowing the steel ball 2 to slide axially along the slide rail 6. This enables the inner ball cage 1 and the outer ball shell 4 to adaptively adjust their relative positions while maintaining power transmission, avoiding jamming caused by axial restriction. The cage 5 engages with the outer ball shell 4 to hold the steel ball 2 in place. Constrained within the corresponding groove, the steel balls 2 maintain a uniform spacing during operation, preventing deviation or collision due to uneven force, thereby maintaining transmission stability. The protective cover 7 tightly wraps around the outer spherical shell 4, and the connecting shafts 3 at both ends form a sealed cavity, blocking dust and mud from entering while preventing grease leakage, providing long-term protection for internal components. The entire structure achieves reliable power transmission under complex working conditions such as automobile steering and construction machinery vibration through the coordinated mechanism of slide rail 6 sliding compensation, cage 5 positioning, and protective cover 7 sealing, while also possessing axial adaptability, structural stability, and ease of maintenance.

[0029] The following points should be noted in this article:

[0030] 1. The accompanying drawings of the embodiments disclosed herein only relate to the structures involved in the embodiments disclosed herein; other structures can be referred to in a general design.

[0031] 2. Where there is no conflict, the embodiments of this disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0032] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing specific embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A sliding inner ball cage, comprising an inner ball cage (1), characterized in that: The inner ball cage (1) is provided with a retainer (5) on the outside, and an outer ball shell (4) is provided on the outside of the retainer (5). A protective cover (7) is provided on the outside of the outer ball shell (4). Multiple steel balls (2) are provided on the outer wall of the inner ball cage (1) and the inner wall of the outer ball shell (4).

2. The sliding inner ball cage according to claim 1, characterized in that: The outer wall of the inner ball cage (1) and the inner wall of the outer ball shell (4) are both provided with slides (6), and the outer wall of the steel ball (2) is engaged with the outer wall of the inner ball cage (1) and the inner wall of the outer ball shell (4).

3. The sliding inner ball cage according to claim 1, characterized in that: The outer wall of the retainer (5) is engaged with the inner wall of the outer spherical shell (4), and the multiple steel balls (2) are disposed in the corresponding grooves on the inner wall of the retainer (5).

4. The sliding inner ball cage according to claim 1, characterized in that: The inner wall of the protective cover (7) is fixed to the outer wall of the outer spherical shell (4), and the outer wall of the protective cover (7) and the inner spherical cage (1) are both fixedly connected to a connecting shaft (3) at the end away from the retainer (5).

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