Vehicle ultra-small specification moving joint

Abstract

The utility model discloses a vehicle ultra-small specification mobile joint, which comprises a main shaft body, one end of the main shaft body forms a shaft section, the other end of the main shaft body is provided with a containing cavity, the inner side wall of the containing cavity is uniformly provided with a plurality of sliding chutes, and the periphery of the shaft section is provided with a first assembly structure used for being matched with a vehicle shaft tube; the ball cage assembly comprises a rotating cap, a retaining ring and balls, an assembly hole used for being connected with another vehicle axle tube in a matched mode is formed in the middle of the rotating cap, grooves with the same number as the balls are formed in the periphery of the rotating cap, the retaining ring is arranged on the periphery of the rotating cap in a sleeving mode, and through holes with the same number as the balls are formed in the peripheral wall of the retaining ring; and moreover, each ball is limited by the sliding groove, the groove and the inner wall of the through hole, the ball cage assembly is allowed to integrally move in the containing cavity in the axis direction of the main shaft body under the action of the balls, and meanwhile the rotating cap is allowed to obliquely overturn within the preset angle range relative to the retaining ring. According to the technical scheme, the function of the universal joint can be achieved, the overall structure is simple, reliable and stable, and assembling, disassembling and maintaining are convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of universal mobile joints for vehicles, in particular to an ultra-small-scale mobile joint for vehicles. Background Art

[0002] A ball-and-cage universal joint, also known as a swivel joint, typically consists of a main shaft and a ball-and-cage assembly movably mounted on one end of the main shaft. The main shaft and ball-and-cage assembly are each connected to a vehicle-grade axle tube to form the overall drive shaft. Conventional ball-and-cage assemblies include a rotating cap and balls uniformly mounted around the cap's periphery, enabling the cap to rotate universally within a certain range relative to the main shaft. The central portion of the rotating cap forms the connection to the vehicle axle tube. To prevent the balls from falling out of the cap, multiple retaining cages, similar to bearing cages, are required to maintain their position. This complicates the overall structure of the ball-and-cage assembly and makes assembly, disassembly, and maintenance difficult. Utility Model Content

[0003] In response to the above-mentioned problems existing in the prior art, an ultra-small mobile joint for a vehicle is now provided, which aims to realize the function of a universal joint, and the overall structure is simple, reliable and stable, and is easy to assemble and disassemble and maintain, so as to overcome at least one of the above-mentioned technical defects.

[0004] The specific technical solutions are as follows:

[0005] An ultra-small mobile joint for a vehicle, comprising:

[0006] The main shaft body has a shaft section at one end and an open accommodating cavity at the other end. The inner side wall of the accommodating cavity is evenly provided with a plurality of sliding grooves extending along the axis of the main shaft body. The outer periphery of the shaft section has a first assembly structure for matching with a vehicle shaft tube.

[0007] The ball cage assembly is entirely accommodated in the accommodating cavity and is movable along the axis of the main shaft body. The ball cage assembly includes a rotating cap, a retaining ring, and a number of balls equal to the number of the slide grooves. The central portion of the rotating cap is formed with an assembly hole for mating with another vehicle axle tube. The outer periphery of the rotating cap has grooves equal to the number of the balls. The retaining ring is sleeved on the outer periphery of the rotating cap and has through holes on the outer periphery equal to the number of the balls.

[0008] Moreover, each ball is respectively limited by the inner wall of the slide groove, the groove and the through hole, and under the action of the ball, the ball cage assembly is allowed to move along the axis direction of the main shaft body in the accommodating cavity, while allowing the rotating cap to tilt and flip relative to the retaining ring within a preset angle range.

[0009] Preferably, the number of the balls is six, and they are evenly arranged circumferentially around the outer circumference of the rotating cap.

[0010] Preferably, the inner wall of the assembly hole has a second assembly structure for matching with another vehicle axle tube.

[0011] Preferably, the first assembly structure is an annular tooth groove structure formed on the outer peripheral wall of the shaft segment.

[0012] Preferably, the second assembly structure is an annular tooth groove structure formed on the inner wall of the assembly hole of the rotating cap.

[0013] Preferably, a retaining ring is detachably embedded in a position adjacent to the opening on the inner wall of the accommodating cavity to prevent the retaining ring from falling outward.

[0014] Preferably, the inner diameter of the retaining ring is larger than the maximum outer diameter of the retaining ring.

[0015] Preferably, the sliding groove and the groove are both arc-shaped groove structures with a length extending along the axis of the main shaft body.

[0016] Preferably, the longitudinal section of the retaining ring is shaped like a waist drum with small ends and a large middle portion, and the minimum inner diameter of the retaining ring is larger than the maximum outer diameter of the rotating cap, and the maximum inner diameter of the retaining ring is larger than the maximum outer diameter of the rotating cap.

[0017] Preferably, the preset angle range is 5 to 15 degrees.

[0018] The beneficial effects of the above technical solution are:

[0019] The ultra-small vehicle-use mobile joint includes a main shaft body and a ball cage assembly. The ball cage assembly includes a rotating cap, a retaining ring, and a ball. One end of the main shaft body forms a shaft section and the other end forms an open accommodating cavity. The ball is jointly limited by the accommodating cavity, the rotating cap, and the retaining frame, so that the rotating cap and the matching vehicle shaft tube can move axially relative to the main shaft body and tilt and flip within a preset angle range, thereby realizing the function of a universal joint. The overall structure is simple, reliable and stable, and is easy to assemble and disassemble for maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a three-dimensional diagram of the ultra-small mobile joint for vehicles of the utility model;

[0021] Figure 2 This is a cross-sectional view of the ultra-small movable joint for vehicles of the utility model;

[0022] Figure 3 This is an exploded view of the ultra-small mobile joint for vehicles of the utility model;

[0023] Figure 4 This is an exploded view of the ultra-small mobile joint for vehicles from another perspective;

[0024] Figure 5 This is a three-dimensional diagram of the ball cage assembly in the ultra-small mobile joint for vehicles of the utility model;

[0025] Figure 6 This is a three-dimensional diagram of the main shaft body of the ultra-small movable joint for vehicles of the present utility model. DETAILED DESCRIPTION

[0026] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is described in detail in the following embodiments with reference to the accompanying drawings.

[0027] See Figures 1 to 6 As shown in , the ultra-small mobile node for vehicle provided in this embodiment includes:

[0028] The main shaft body 1 has a shaft section 10 at one end and an open accommodating cavity 5 at the other end. The inner wall of the accommodating cavity 5 is evenly provided with multiple sliding grooves 6 extending along the axis of the main shaft body 1. The outer periphery of the shaft section 10 has a first assembly structure 11 for connecting to a vehicle axle tube.

[0029] The ball cage assembly is entirely housed within the accommodating cavity 5 and is movable along the axis of the main shaft body 1. The ball cage assembly includes a rotating cap 2, a retaining ring 4, and a number of balls 3 equal to the number of slide grooves 6. The central portion of the rotating cap 2 is formed with an assembly hole 8 for mating with another vehicle axle tube. The outer periphery of the rotating cap 2 has grooves 7 equal to the number of balls 3. The retaining ring 4 is fitted over the outer periphery of the rotating cap 2 and has through-holes 9 on the outer peripheral wall equal to the number of balls 3.

[0030] In addition, each ball 3 is respectively limited by the inner wall of the slide groove 6, the groove 7 and the through hole 9, and under the action of the ball 3, the ball cage assembly as a whole is allowed to move along the axial direction of the main shaft body 1 in the accommodating cavity 5, and at the same time, the rotating cap 2 is allowed to tilt and flip relative to the retaining ring 4 within a preset angle range.

[0031] Based on the above technical solution, the ultra-small vehicle-use mobile joint includes a main shaft body 1 and a ball cage assembly. The ball cage assembly includes a rotating cap 2, a retaining ring 4, and a ball 3. One end of the main shaft body 1 forms a shaft section 10 and the other end forms an open accommodating cavity 5. The ball 3 is jointly limited by the accommodating cavity 5, the rotating cap 2 and the retaining frame, so that the rotating cap 2 and the matching vehicle shaft tube can move axially relative to the main shaft body 1 and tilt and flip within a preset angle range, thereby realizing the function of a universal joint. The overall structure is simple, reliable and stable, and is easy to assemble and disassemble for maintenance.

[0032] In a preferred embodiment, the number of balls 3 is six, and they are evenly arranged circumferentially on the outer periphery of the rotating cap 2. Furthermore, a second assembly structure 12 for matching another vehicle axle tube is provided on the inner wall of the assembly hole. Furthermore, the first assembly structure 11 is an annular tooth groove structure formed on the outer peripheral wall of the shaft section 10. Furthermore, the second assembly structure 12 is an annular tooth groove structure formed on the inner wall of the assembly hole of the rotating cap 2. Obviously, the first assembly structure 11 and the second assembly structure 12 can also be implemented by, for example, a spline and keyway structure or other pin and pin hole structures, and are not limited thereto.

[0033] As a further preferred embodiment, a retaining spring 13 is detachably embedded in a position adjacent to the opening on the inner wall of the accommodating chamber 5 to prevent the retaining ring 4 from slipping out. Furthermore, the inner diameter of the retaining spring 13 is larger than the maximum outer diameter of the retaining ring 4. Furthermore, the slide groove 6 and the groove 7 are both arc-shaped groove structures whose length extends along the axis of the main shaft body 1 to adapt to the ball 3. Furthermore, the longitudinal section of the retaining ring 4 is generally in the shape of a waist drum with small ends and a large middle part, and the minimum inner diameter of the retaining ring 4 is larger than the maximum outer diameter of the rotating cap 2, and the maximum inner diameter of the retaining ring 4 is larger than the maximum outer diameter of the rotating cap 2, so that the rotating cap 2 can be placed in the retaining ring 4 and cannot fall out after the ball 3 is configured, while allowing the rotating cap 2 to tilt and flip in the retaining ring 4. Furthermore, in this embodiment, the preset angle range is 5 to 15 degrees. The size of this parameter is determined by the size of the through hole 9 on the retaining frame and the size of the ball 3, and can be adjusted as needed.

[0034] The above description is merely a preferred embodiment of the present invention and is intended to be illustrative rather than restrictive of the present invention. Those skilled in the art will appreciate that many changes, modifications, and even equivalents may be made to the present invention within the spirit and scope of the claims, and all of these changes will fall within the scope of protection of the present invention.

Claims

1. An ultra-small mobile joint for a vehicle, characterized in that: include: A main shaft body (1) has a shaft section (10) at one end and an open accommodating cavity (5) at the other end, and a plurality of sliding grooves (6) extending along the axial direction of the main shaft body (1) are evenly arranged on the inner side wall of the accommodating cavity (5), and the outer periphery of the shaft section (10) has a first assembly structure (11) for matching with a vehicle shaft tube; A ball cage assembly is entirely accommodated in the accommodating cavity (5) and is movable along the axis of the main shaft (1), and the ball cage assembly comprises a rotating cap (2), a retaining ring (4), and balls (3) of the same number as the slide groove (6); a central portion of the rotating cap (2) is provided with an assembly hole (8) for connecting to another vehicle shaft tube; an outer periphery of the rotating cap (2) is provided with grooves (7) of the same number as the balls (3); the retaining ring (4) is fitted on the outer periphery of the rotating cap (2) and has through holes (9) on the outer peripheral wall of the rotating cap (2) of the same number as the balls (3); Furthermore, each of the balls (3) is respectively limited by the inner wall of the slide groove (6), the groove (7) and the through hole (9), and under the action of the balls (3), the ball cage assembly is allowed to move as a whole in the accommodating cavity (5) along the axial direction of the main shaft body (1), while allowing the rotating cap (2) to tilt and flip relative to the retaining ring (4) within a preset angle range.

2. The ultra-small mobile joint for a vehicle according to claim 1, characterized in that: The number of the balls (3) is six, and they are evenly arranged circumferentially on the outer periphery of the rotating cap (2).

3. The ultra-small mobile joint for a vehicle according to claim 1, characterized in that: The inner wall of the assembly hole is provided with a second assembly structure (12) for matching with another vehicle axle tube.

4. The ultra-small mobile joint for a vehicle according to claim 3, characterized in that: The first assembly structure (11) is an annular tooth groove structure formed on the outer peripheral wall of the shaft section (10).

5. The ultra-small mobile joint for a vehicle according to claim 4, characterized in that: The second assembly structure (12) is an annular tooth groove structure formed on the inner wall of the assembly hole of the rotating cap (2).

6. The ultra-small mobile joint for a vehicle according to claim 2, characterized in that: A retaining ring (13) is detachably embedded in a position adjacent to the opening on the inner wall of the accommodating cavity (5) to prevent the retaining ring (4) from falling out.

7. The ultra-small mobile joint for a vehicle according to claim 6, characterized in that: The inner diameter of the clamping spring (13) is greater than the maximum outer diameter of the retaining ring (4).

8. The ultra-small mobile joint for a vehicle according to claim 2, characterized in that: The sliding groove (6) and the groove (7) are both arc-shaped groove structures whose lengths extend along the axis of the main shaft body (1).

9. The ultra-small mobile joint for a vehicle according to claim 7, characterized in that: The longitudinal section of the retaining ring (4) is in the shape of a waist drum with small ends and a large middle portion, and the minimum inner diameter of the retaining ring (4) is greater than the maximum outer diameter of the rotating cap (2), while the maximum inner diameter of the retaining ring (4) is greater than the maximum outer diameter of the rotating cap (2).

10. The ultra-small mobile joint for a vehicle according to claim 1, characterized in that: The preset angle range is 5 to 15 degrees.

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