Steel ball type lower steering shaft assembly

Abstract

The utility model relates to the technical field of steering shaft assemblies, in particular to a steel ball type lower steering shaft assembly. According to the technical scheme, the device comprises a shaft sleeve and a transmission shaft, one end of the transmission shaft is located in the shaft sleeve, a plurality of first spherical grooves are formed in the inner wall of the shaft sleeve in an annular array mode at equal intervals, and a plurality of second spherical grooves are formed in the position, close to the lower surface, of the outer surface of the transmission shaft in an annular array mode; second spherical grooves are formed in the inner wall of each first spherical groove, ball retainers are arranged in the second spherical grooves, steel balls are arranged in the ball retainers, a stepped groove is formed in the inner wall of each second spherical groove, a movable plate is arranged in each stepped groove, and a spring is fixedly connected to the outer surface of each movable plate. In the using process of the steel ball type lower steering shaft assembly, the steel ball type lower steering shaft assembly can compensate a steering torsion gap generated by abrasion of the steel ball, and the service life of the steering shaft assembly is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of steering shaft assemblies, in particular to a steel ball and roller type lower steering shaft assembly. Background Art

[0002] The steering shaft assembly is the core part of the automobile steering system. Its upper and lower parts are fixedly connected to the steering wheel and the steering gear respectively, so that the driver can transmit the steering torque to the steering gear through the steering wheel.

[0003] At present, the telescopic sliding structure in the steel ball and ball bearing type lower steering shaft assembly is achieved by the cooperation of steel balls and spherical grooves. However, during long-term use, the steel balls will have steering torsional clearance due to wear, which reduces the service life. Therefore, we propose a steel ball and ball bearing type lower steering shaft assembly. Utility Model Content

[0004] The utility model aims to provide a steel ball roller type lower steering shaft assembly, which has the advantage of being able to compensate for the steering torsional clearance caused by the wear of the steel balls during the use of the steel ball roller type lower steering shaft assembly, thereby extending the service life of the steering shaft assembly, and solving the problem that the telescopic sliding structure in the current steel ball roller type lower steering shaft assembly is achieved by the cooperation of the steel balls and the spherical grooves, but during long-term use, the steel balls develop steering torsional clearance due to wear, thereby reducing the service life.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a steel ball and roller type lower steering shaft assembly, comprising a shaft sleeve and a transmission shaft, one end of the transmission shaft is located inside the shaft sleeve, the inner wall of the shaft sleeve is provided with a plurality of first spherical grooves in an annular array and equidistantly spaced, the outer surface of the transmission shaft is provided with a plurality of second spherical grooves in an annular array near the lower surface, a ball retainer is provided inside the second spherical groove, a steel ball is provided inside the ball retainer, each of the second spherical grooves is provided with a stepped groove on the inner wall, a movable plate is provided inside each of the stepped grooves, and a spring is fixedly connected to the outer surface of each movable plate.

[0006] Preferably, one end of the transmission shaft located outside the shaft sleeve is fixedly connected to a second universal shaft.

[0007] Preferably, one end of the shaft sleeve facing away from the second cardan shaft is fixedly connected to the first cardan shaft.

[0008] Preferably, an annular groove is provided on the outer surface of the transmission shaft below the ball retainer, and a limiting retaining spring is provided inside the annular groove.

[0009] Preferably, an annular groove is provided on the upper surface of the shaft sleeve, and a rubber ring is provided inside the annular groove, and a fixed pressure ring is fixedly installed on the upper surface of the rubber ring.

[0010] Preferably, the fixed pressure ring and the shaft sleeve are fixedly connected by bolts.

[0011] Preferably, a limiting ring is arranged near the edge of the lower surface of the fixed pressure ring, and the top end of the rubber ring is located inside the limiting ring.

[0012] Preferably, an extension ring is provided on the upper surface of the rubber ring near the axis, and the extension ring passes through the interior of the fixed pressure ring.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0014] 1. The utility model achieves the effect of compensating for the steering torsional clearance caused by the wear of the steel balls during the use of the steel ball and ball type lower steering shaft assembly by arranging a shaft sleeve, a transmission shaft, a first spherical groove, a second spherical groove, a ball retainer, a steel ball, a stepped groove, a movable plate and a spring, thereby extending the service life of the steering shaft assembly. When the steering torsional clearance is caused by the wear of the steel ball, the elastic force of the spring acts on the steel ball through the movable plate, thereby compensating for the steering torsional clearance.

[0015] 2. The utility model achieves the effect of preventing external dust from entering the interior of the shaft sleeve by arranging a fixed pressure ring, a rubber ring and an extension ring. During the process of the transmission shaft extending and sliding inside the shaft sleeve, the extension ring scrapes off the dust and impurities adhering to the outer surface of the transmission shaft, and also plays a sealing role to prevent dust and impurities from entering the interior of the shaft sleeve.

[0016] 3. The utility model achieves the effect of limiting and protecting the rubber ring by setting the annular groove and the limiting ring. The upper and lower parts of the rubber ring are respectively located inside the limiting ring and the annular groove, so the rubber ring is wrapped, which plays a role of protection and limiting. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional schematic diagram of the utility model;

[0018] Figure 2 This is a schematic diagram of the main cross-sectional structure of the utility model;

[0019] Figure 3 For this utility model Figure 2 A is a schematic diagram of the enlarged structure of the middle part;

[0020] Figure 4 For this utility model Figure 2 Schematic diagram of the enlarged structure of B.

[0021] Figure numerals: 1. first cardan shaft; 2. shaft sleeve; 3. fixed pressure ring; 4. transmission shaft; 5. second cardan shaft; 6. first spherical groove; 7. steel ball; 8. ball retainer; 9. limit retaining spring; 10. annular retaining groove; 11. second spherical groove; 12. stepped groove; 13. movable plate; 14. spring; 15. extension ring; 16. limit ring; 17. rubber ring; 18. annular groove. DETAILED DESCRIPTION

[0022] The technical solution of the utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0023] Embodiment 1

[0024] like Figure 1-Figure 3 As shown, the utility model proposes a steel ball and roller type lower steering shaft assembly, including a shaft sleeve 2 and a transmission shaft 4, one end of the transmission shaft 4 located outside the shaft sleeve 2 is fixedly connected with a second cardan shaft 5, the end of the shaft sleeve 2 away from the second cardan shaft 5 is fixedly connected with a first cardan shaft 1, one end of the transmission shaft 4 is located inside the shaft sleeve 2, and the inner wall of the shaft sleeve 2 is provided with a plurality of first spherical grooves 6 in an annular array and equidistantly, the first spherical grooves 6 are hemispherical and extend to the upper surface of the shaft sleeve 2, and the outer surface of the transmission shaft 4 is provided with a plurality of second spherical grooves 11 in an annular array near the lower surface, the second spherical grooves 11 are hemispherical, the second spherical grooves 11 correspond one-to-one to the first spherical grooves 6, and the second spherical grooves 11 extend to the lower surface of the transmission shaft 4.

[0025] A ball retainer 8 is arranged inside the second spherical groove 11, an annular groove 10 is arranged on the outer surface of the transmission shaft 4 below the ball retainer 8, and a limiting retaining spring 9 is arranged inside the annular groove 10, which limits the ball retainer 8. A steel ball 7 is arranged inside the ball retainer 8, and the steel ball 7 is located inside the first spherical groove 6 and the second spherical groove 11. A stepped groove 12 is arranged on the inner wall of each second spherical groove 11, a movable plate 13 is arranged inside each stepped groove 12, and a spring 14 is fixedly connected to the outer surface of each movable plate 13.

[0026] When the steel ball 7 generates a steering torsional clearance due to wear, the elastic force of the spring 14 acts on the steel ball 7 through the movable plate 13, thereby compensating for the steering torsional clearance and extending the service life of the steering shaft assembly.

[0027] Embodiment 2

[0028] like Figures 1 to 4As shown, a steel ball and roller type lower steering shaft assembly proposed by the utility model, compared with the first embodiment, this embodiment also includes an annular groove 18 provided on the upper surface of the shaft sleeve 2, and a rubber ring 17 is provided inside the annular groove 18, a fixed pressure ring 3 is fixedly installed on the upper surface of the rubber ring 17, the fixed pressure ring 3 and the shaft sleeve 2 are fixedly connected by bolts, a limiting ring 16 is provided near the edge position of the lower surface of the fixed pressure ring 3, and the top of the rubber ring 17 is located inside the limiting ring 16, the limiting ring 16 and the fixed pressure ring 3 are integrally formed, the upper and lower parts of the rubber ring 17 are respectively located inside the limiting ring 16 and the annular groove 18, then the rubber ring 17 is wrapped up, which plays a role of protection and limiting, an extension ring 15 is provided on the upper surface of the rubber ring 17 near the axis position, and the extension ring 15 passes through the inside of the fixed pressure ring 3, and the extension ring 15 and the rubber ring 17 are integrally formed.

[0029] In this embodiment, during the telescopic sliding of the transmission shaft 4 inside the shaft sleeve 2, the extension ring 15 scrapes off dust and impurities adhering to the outer surface of the transmission shaft 4 and also plays a sealing role to prevent dust and impurities from entering the interior of the shaft sleeve 2.

[0030] The above-mentioned specific embodiments are only several preferred embodiments of the present invention. Based on the technical solution of the present invention and the relevant inspiration of the above-mentioned embodiments, those skilled in the art can make various alternative improvements and combinations to the above-mentioned specific embodiments.

Claims

1. A steel ball bearing type lower steering shaft assembly, comprising a shaft sleeve (2) and a transmission shaft (4), characterized in that: One end of the transmission shaft (4) is located inside the shaft sleeve (2); the inner wall of the shaft sleeve (2) is provided with a plurality of first spherical grooves (6) in an annular array at equal intervals; the outer surface of the transmission shaft (4) is provided with a plurality of second spherical grooves (11) in an annular array near the lower surface; a ball retainer (8) is provided inside the second spherical groove (11); a steel ball (7) is provided inside the ball retainer (8); each of the second spherical grooves (11) is provided with a stepped groove (12) on the inner wall; each of the stepped grooves (12) is provided with a movable plate (13); and a spring (14) is fixedly connected to the outer surface of each movable plate (13).

2. The steel ball and roller type lower steering shaft assembly according to claim 1, characterized in that: One end of the transmission shaft (4) located outside the shaft sleeve (2) is fixedly connected to a second universal shaft (5).

3. The steel ball type lower steering shaft assembly according to claim 2, characterized in that: One end of the shaft sleeve (2) facing away from the second cardan shaft (5) is fixedly connected to the first cardan shaft (1).

4. The steel ball and roller type lower steering shaft assembly according to claim 1, characterized in that: An annular groove (10) is provided on the outer surface of the transmission shaft (4) at a position below the ball retaining frame (8), and a limiting retaining spring (9) is provided inside the annular groove (10).

5. The steel ball and roller type lower steering shaft assembly according to claim 1, characterized in that: An annular groove (18) is provided on the upper surface of the shaft sleeve (2), and a rubber ring (17) is provided inside the annular groove (18), and a fixed pressure ring (3) is fixedly mounted on the upper surface of the rubber ring (17).

6. The steel ball type lower steering shaft assembly according to claim 5, characterized in that: The fixed pressure ring (3) and the shaft sleeve (2) are fixedly connected via bolts.

7. The steel ball and roller type lower steering shaft assembly according to claim 5, characterized in that: A limiting ring (16) is arranged near the edge of the lower surface of the fixed pressure ring (3), and the top end of the rubber ring (17) is located inside the limiting ring (16).

8. The steel ball and roller type lower steering shaft assembly according to claim 5, characterized in that: An extension ring (15) is provided on the upper surface of the rubber ring (17) near the axis, and the extension ring (15) passes through the interior of the fixed pressure ring (3).

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