Ball cage shaft structure

Abstract

The utility model relates to power transmission system technical field, concretely relates to a ball cage axle structure, it includes: inner flange, the inner flange annular distribution has a plurality of mounting holes, and one end of inner flange is equipped with ball cage shell, ball cage universal joint, ball cage universal joint is fitted in ball cage shell, half axle, one end of half axle is connected with ball cage universal joint, the other end extends to ball cage shell outside, and one end of half axle away from inner flange is equipped with ball joint, the utility model discloses a pre -assembled as a whole module through inner flange, ball cage universal joint and half axle, reduces the assembly link, improves production efficiency and consistency, in actual use, the assembly design supports quick replacement, when single component is damaged, need not to decompose transmission chain one by one, reduces maintenance cost.

Description

Technical Field

[0001] This utility model relates to the field of power transmission system technology, specifically to a ball cage shaft structure. Background Technology

[0002] With the increasing popularity of electric scooters, the reliability, assembly efficiency, and ease of maintenance of their transmission systems have become a focus of industry attention. Traditional electric scooter transmission components, such as half-shafts, universal joints, and differential flanges, typically employ a split design, achieving power transmission through multi-stage assembly. This structure has the following drawbacks:

[0003] 1. High assembly complexity: The modular design requires each part to be aligned and fastened individually, which increases the production line's working hours and labor costs.

[0004] 2. Insufficient connection stability: Inadequate fit between components can easily lead to vibration, abnormal noise, or even transmission failure, affecting service life;

[0005] 3. Inconvenient maintenance: When a single component is damaged, the entire transmission chain needs to be disassembled, resulting in low maintenance efficiency.

[0006] Therefore, there is an urgent need for an integrated transmission assembly that integrates the half-shaft, ball joint, and differential connecting flange into a single module through optimized structural design, in order to improve transmission efficiency, reduce assembly difficulty, and enhance reliability. Utility Model Content

[0007] This invention provides a ball cage shaft structure that pre-assembles the inner flange, ball cage universal joint, and half shaft into a single module, reducing assembly steps and improving production efficiency and consistency. In practical use, the modular design supports quick replacement; when a single component is damaged, there is no need to disassemble the entire drivetrain, reducing maintenance costs.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a ball cage shaft structure, comprising: an inner flange, wherein a plurality of mounting holes are distributed circumferentially around the inner flange, and a ball cage shell is provided at one end of the inner flange; a ball cage universal joint, wherein the ball cage universal joint is fitted inside the ball cage shell; and a half shaft, wherein one end of the half shaft is connected to the ball cage universal joint, and the other end extends outward from the ball cage shell, and a ball joint is provided at the end of the half shaft away from the inner flange.

[0009] Preferably, the outer wall of the ball cage shell is provided with a groove in the circumferential direction; it also includes a dust cover that cooperates with the groove, and the end of the dust cover away from the ball cage shell is provided with a sliding sleeve that cooperates with the half shaft.

[0010] Preferably, the inner sidewall of the ball cage shell is provided with a plurality of outer raceways; the ball cage universal joint includes an inner ball cage connected to the half shaft, the outer wall of the inner ball cage is provided with an inner raceway corresponding to each of the outer raceways, and also includes a steel ball that fits between the inner raceway and the outer raceway, and also includes a retainer sleeved between the inner ball cage and the ball cage shell, the retainer being provided with a window corresponding to each of the steel balls.

[0011] Preferably, the half-shaft is provided with a positioning ring corresponding to the outside of the inner ball cage.

[0012] Preferably, the half-shaft is provided with a retaining ring at one end corresponding to the ball cage shell, which cooperates with the inner ball cage.

[0013] The advantages of this invention are as follows: The inner flange is fixed to the differential or drive motor output of the electric scooter through mounting holes, receiving torque input. The ball cage universal joint, within the ball cage housing, transmits torque from the inner flange to the half-shaft through the cooperation of steel balls and inner and outer raceways. Simultaneously, it allows the half-shaft to deflect within a certain angle range to accommodate changes in angle during wheel movement or turning. The ball joint at the end of the half-shaft transmits power to the wheel through the universal joint-equipped axle head, ultimately transferring power to the wheel and completing the drive. Because this design pre-assembles the inner flange, ball cage universal joint, and half-shaft into a single module, it reduces assembly steps and improves production efficiency and consistency. In practical use, the modular design supports quick replacement; when a single component is damaged, there is no need to disassemble the entire drivetrain, reducing maintenance costs. The locating ring is used to precisely limit the axial position of the inner ball cage on the half-shaft. This ensures correct alignment of the steel balls in the inner / outer raceways, avoiding abnormal wear or transmission clearance caused by axial movement, and improving the motion accuracy and lifespan of the universal joint. The retaining ring is elastically engaged in the annular groove of the half-shaft, firmly locking the inner ball cage onto the half-shaft. This prevents the inner ball cage from separating from the half-shaft due to vibration or torque fluctuations during operation, ensuring the reliability of power transmission. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is an exploded view of the components of this utility model;

[0017] Figure 3 This is a partial structural cross-sectional view of the present invention.

[0018] In the diagram: 1. Inner flange; 2. Mounting hole; 3. Ball cage shell; 4. Half shaft; 5. Ball joint; 6. Slot; 7. Dust cover; 8. Sliding sleeve; 9. Outer raceway; 10. Inner ball cage; 11. Inner raceway; 12. Steel ball; 13. Cage; 14. Locating ring; 15. Snap ring. Detailed Implementation

[0019] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] according to Figure 1 , Figure 2 , Figure 3 As shown, a ball cage shaft structure includes: an inner flange 1, which has multiple mounting holes 2 distributed circumferentially, and a ball cage shell 3 at one end of the inner flange 1; a ball cage universal joint, which fits inside the ball cage shell 3; a half shaft 4, one end of which is connected to the ball cage universal joint, and the other end extends outward from the ball cage shell 3, and a ball joint 5 is provided at the end of the half shaft 4 away from the inner flange 1. The inner sidewall of the ball cage shell 3 has multiple outer raceways 9; the ball cage universal joint includes an inner ball cage 10 connected to the half shaft 4, an inner raceway 11 corresponding to each of the outer raceways 9 on the outer wall of the inner ball cage 10, steel balls 12 fitting between the inner raceways 11 and the outer raceways 9, and a retainer 13 sleeved between the inner ball cage 10 and the ball cage shell 3, the retainer 13 having windows corresponding to each of the steel balls 12.

[0021] In the above configuration, the inner flange 1 is fixed to the differential or drive motor output of the electric scooter via mounting holes 2, receiving torque input. The ball cage universal joint, within the ball cage housing 3, transmits torque from the inner flange 1 to the half-shaft 4 through the cooperation of steel balls 12 and inner and outer raceways 9. Simultaneously, it allows the half-shaft 4 to deflect within a certain angle range to accommodate changes in angle during wheel movement or turning. The ball joint 5 at the end of the half-shaft 4 transmits power to the wheel via a shaft head with a universal joint, ultimately transferring power to the wheel and completing the drive. Because this design pre-assembles the inner flange 1, ball cage universal joint, and half-shaft 4 as a single module, it reduces assembly steps and improves production efficiency and consistency. In practical use, the modular design supports quick replacement; when a single component is damaged, there is no need to disassemble the entire drivetrain, reducing maintenance costs.

[0022] In addition, the outer side wall of the ball cage shell 3 is provided with a groove 6 in the circumferential direction; it also includes a dust cover 7 that cooperates with the groove 6, and the end of the dust cover 7 away from the ball cage shell 3 is provided with a sliding sleeve 8 that cooperates with the half shaft 4.

[0023] This design achieves a sealed structure, preventing dust and moisture from entering and thus extending service life. Meanwhile, the sliding sleeve 8 compensates for the axial displacement of the end of the dust cover 7 through axial expansion and contraction, preventing the dust cover 7 from cracking due to wrinkles or local stress concentration.

[0024] The half-shaft 4 is provided with a positioning ring 14 on the outside of the inner ball cage 10. The half-shaft 4 is provided with a retaining spring 15 at one end of the ball cage shell 3, which cooperates with the inner ball cage 10.

[0025] In this configuration, the positioning ring 14 precisely limits the axial position of the inner ball cage 10 on the half-shaft 4. This ensures the correct alignment of the steel balls 12 in the inner / outer raceways 9, preventing abnormal wear or transmission clearance caused by axial movement, and improving the motion accuracy and lifespan of the universal joint. The retaining ring 15 is elastically engaged in the annular groove of the half-shaft 4, firmly locking the inner ball cage 10 onto the half-shaft 4, preventing the inner ball cage 10 from separating from the half-shaft 4 due to vibration or torque fluctuations during operation, and ensuring the reliability of power transmission.

[0026] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A ball cage shaft structure, characterized in that, include: An inner flange (1) is provided with a plurality of mounting holes (2) distributed around its circumference, and a ball cage shell (3) is provided at one end of the inner flange (1). A ball cage universal joint, which fits inside the ball cage shell (3); Half shaft (4), one end of which is connected to the universal joint of the ball cage, and the other end extends outward from the ball cage shell (3), and a ball joint (5) is provided at the end of the half shaft (4) away from the inner flange (1).

2. The ball cage shaft structure according to claim 1, characterized in that: The outer wall of the ball cage shell (3) is provided with a groove (6) around its perimeter; it also includes a dust cover (7) that cooperates with the groove (6), and the end of the dust cover (7) away from the ball cage shell (3) is provided with a sliding sleeve (8) that cooperates with the half shaft (4).

3. The ball cage shaft structure according to claim 2, characterized in that: The inner wall of the ball cage shell (3) is provided with a plurality of outer raceways (9); the ball cage universal joint includes an inner ball cage (10) connected to the half shaft (4), the outer wall of the inner ball cage (10) is provided with an inner raceway (11) corresponding to each of the outer raceways (9), and also includes steel balls (12) that fit between the inner raceway (11) and the outer raceway (9), and also includes a retainer (13) sleeved between the inner ball cage (10) and the ball cage shell (3), the retainer (13) being provided with windows corresponding to each of the steel balls (12).

4. The ball cage shaft structure according to claim 3, characterized in that: The half-shaft (4) is provided with a positioning ring (14) on the outside of the inner ball cage (10).

5. The ball cage shaft structure according to claim 4, characterized in that: The half-shaft (4) is provided with a retaining ring (15) at one end corresponding to the ball cage shell (3) to cooperate with the inner ball cage (10).

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