Vehicle obtuse angle steering gear with low torsion gap

Abstract

The invention discloses an automotive obtuse angle steering gear with a low torsion gap, and relates to the technical field of angle steering gear, the automotive obtuse angle steering gear comprises a box body, a first gear shaft and a second gear shaft which are meshed with each other are arranged in the box body, and the included angle between the axis of the first gear shaft and the axis of the second gear shaft is an obtuse angle theta; each gear shaft is fixed to the box body through a first bearing and a second bearing which are independent to eliminate the radial clearance of the assembly, sealing assemblies are arranged between the first gear shaft and the box body and between the second gear shaft and the box body respectively, a mounting flange is integrated in the middle of the box body, and horizontal or vertical mounting can be achieved. The device is compact in structure and can adapt to working scenes needing obtuse-angle transmission, and steering flexibility is improved; the mounting flange is arranged in the middle of the box body, so that horizontal or vertical mounting can be realized, and the adaptability is improved; and a double-bearing and thick gasket structure is adopted, so that the torsion gap of the assembly is effectively reduced, and the transmission precision and response speed of a steering system are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of angle steering gears, in particular to a vehicle-used obtuse-angle steering gear with low torsional clearance. Background Art

[0002] The automotive steering gear is a core component of the vehicle's steering system, and its performance directly affects the vehicle's handling stability and driving safety. Currently, most common angle steering gears on the market have their mounting surface located at the bottom of the housing. This conventional design exposes numerous limitations under certain operating conditions: On the one hand, when the internal space is complex, the bottom space is occupied by other components, or the bottom mounting surface is difficult to access, the bottom-mounted steering gear cannot be easily installed and maintained. On the other hand, for certain vehicles with special requirements for center of gravity distribution and spatial layout, bottom mounting may lead to an unstable center of gravity or fail to meet compact design requirements. Furthermore, in existing technologies, the input and output shafts are often set at right angles, making them difficult to adapt to special working scenarios requiring obtuse-angle transmission and unable to meet diverse mechanical transmission requirements. Traditional steering gears often use a single-bearing structure with a thin gasket for clearance adjustment. However, the single-bearing structure has poor stability when subjected to radial loads and is prone to radial clearance. Furthermore, the thin gasket is prone to deformation during long-term use, resulting in increased torsional clearance, which affects the transmission accuracy and response speed of the steering system. Summary of the Invention

[0003] The purpose of the present invention is to solve the above technical problems and provide an angle steering gear with an obtuse angle between the input shaft and the output shaft and low torsional clearance, so as to improve the stability and transmission accuracy of the steering system.

[0004] In order to achieve the above technical objectives and meet the above technical requirements, the technical solution adopted by the present invention is: a low-torsional clearance vehicle obtuse-angle steering gear, including a housing, a first gear shaft and a second gear shaft that are meshed with each other are arranged in the housing, the angle between the axis of the first gear shaft and the axis of the second gear shaft is an obtuse angle θ, each gear shaft is fixed to the housing by two independent first bearings and second bearings to eliminate the radial clearance of the assembly and improve stability, a sealing assembly is respectively provided between the first gear shaft, the second gear shaft and the housing, a mounting flange is integrated in the middle of the housing, the flange surface is parallel to the plane where the axis of the second gear shaft is located, and intersects with the plane where the axis of the first gear shaft is located, to achieve horizontal or vertical installation, and a rubber pad is provided on the mounting flange for shock absorption and noise reduction.

[0005] Preferably, the sealing assembly comprises a spacer ring, a hole elastic retaining ring, and a skeleton oil seal which are sequentially arranged along the axial direction, and dust covers are provided on both end surfaces of the box body.

[0006] Preferably, the spacer is configured as a thick gasket with a thickness of more than 2 mm to eliminate the gap caused by deformation of the thin gasket and reduce the torsional clearance of the angle steering assembly.

[0007] Preferably, the lip of the skeleton oil seal is provided with a dustproof cutting edge and is made of fluororubber. The dustproof cutting edge can further improve the dustproof effect of the oil seal.

[0008] Preferably, the two first bearings are respectively arranged at the shoulders of the first gear shaft and the second gear shaft, the inner ring of the housing is provided with positioning steps corresponding to the first bearings, and a shaft elastic retaining ring is provided in the shaft groove on one side of the second bearing.

[0009] Preferably, the angle θ between the axis of the first gear shaft and the axis of the second gear shaft is set to 100°-150°, preferably 120°.

[0010] Preferably, at least 4 mounting holes are evenly distributed on the mounting flange.

[0011] Preferably, an oil cup is provided at the bottom of the box, and the oil channel directly leads to the gear meshing area.

[0012] Preferably, the first gear shaft and the second gear shaft are both configured as an integral structure.

[0013] Compared with the traditional structure, the present invention has the following advantages: 1. The present invention has a compact structure and is easy to install. The angle between the two gear shaft axes is set to 120 degrees obtuse angle, which can adapt to working scenarios requiring obtuse angle transmission and improve steering flexibility.

[0014] 2. The mounting flange is set in the middle of the box body and matched with the rubber pad on the flange surface to improve the stability and sealing of the angle steering device installation, reduce vibration transmission, and can be installed horizontally or vertically to improve adaptability.

[0015] 3. The dual-bearing structure effectively eliminates the radial clearance of the assembly and improves the radial support stability of the gear shaft; the use of thick gaskets instead of traditional thin gaskets avoids the gap caused by the deformation of thin gaskets, reduces the torsional clearance of the assembly, and improves the transmission accuracy and response speed of the steering system.

[0016] 4. The setting of skeleton oil seal and dust cover ensures the lubrication and cleanliness of the interior of the angle steering gear and extends the service life of the parts; the setting of oil cup facilitates the replenishment of lubricating oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a left side view of the present invention; Figure 3 A top view of the present invention; In the figure: 1. First gear shaft, 2. Dust cover, 3. Skeleton oil seal, 4. Housing, 41. Positioning step, 5. Elastic circlip for hole, 6. Spacer, 7. Elastic circlip for shaft, 8. Oil cup, 9. Rubber pad, 10. First bearing, 11. Second gear shaft, 12. Second bearing, 13. Mounting flange, 131. Mounting hole. DETAILED DESCRIPTION

[0018] The present invention will be further described below.

[0019] Refer to the attached Figure 1 , a low torsional clearance vehicle obtuse-angle steering gear, including a box body 4, in which a first gear shaft 1 and a second gear shaft 11 meshing with each other are arranged, and the angle between the axis of the first gear shaft 1 and the axis of the second gear shaft 11 is an obtuse angle θ, and each gear shaft is fixed to the box body 4 by two independent first bearings 10 and second bearings 12 to eliminate the radial clearance of the assembly and improve stability. A sealing assembly is respectively provided between the first gear shaft 1, the second gear shaft 11 and the box body 4, and a mounting flange 13 is integrated in the middle of the box body 4. The flange surface is parallel to the plane where the axis of the second gear shaft 11 is located, and intersects with the plane where the axis of the first gear shaft 1 is located, to achieve horizontal or vertical installation, and a rubber pad 9 is provided on the mounting flange 13 for shock absorption and noise reduction.

[0020] In this preferred embodiment, the sealing assembly includes a spacer 6 , a hole elastic retaining ring 5 , and a skeleton oil seal 3 , which are sequentially arranged along the axial direction. Dust covers 2 are provided on both end surfaces of the box body 4 .

[0021] In this preferred embodiment, the spacer 6 is configured as a thick gasket with a thickness of more than 2 mm to eliminate the gap caused by the deformation of the thin gasket and reduce the torsional clearance of the angle steering assembly.

[0022] In this preferred embodiment, the two first bearings 10 are respectively arranged at the shoulders of the first gear shaft 1 and the second gear shaft 11, and a positioning step 41 is provided at the inner ring of the housing 4 corresponding to the first bearing 10, and a shaft elastic retaining ring 7 is provided in the shaft groove on one side of the second bearing 12.

[0023] In this preferred embodiment, the angle θ between the axis of the first gear shaft 1 and the axis of the second gear shaft 11 is set to 100°-150°, preferably 120°.

[0024] In this preferred embodiment, at least four mounting holes 131 are evenly distributed on the mounting flange 13 .

[0025] In this preferred embodiment, an oil cup 8 is provided at the bottom of the box body 4, and the oil passage directly leads to the gear meshing area.

[0026] In this preferred embodiment, the lip of the skeleton oil seal 3 is provided with a dustproof cutting edge and is made of fluororubber. The dustproof cutting edge can further improve the dustproof effect of the oil seal. Fluororubber has excellent high temperature resistance, oil resistance and chemical corrosion resistance, and is suitable for use in the harsh working environment of the automobile steering gear.

[0027] In this preferred embodiment, the first gear shaft 1 and the second gear shaft 11 are both configured as an integral structure.

[0028] In specific implementation, a 120° obtuse angle design is adopted. This angle setting can adapt to the steering transmission requirements of specific vehicle models and improve steering flexibility. The mounting flange 13 is set in the middle of the housing 4, with the flange surface intersecting with the axis plane of the first gear shaft 1 and parallel to the axis of the second gear shaft 11. The two axes are separated on both sides of the flange, supporting horizontal or vertical installation. This position and angle design enables the mounting flange 13 to more stably fix the steering gear to the vehicle, improving installation reliability. The flange surface of the mounting flange 13 is provided with a rubber pad 9, which can act as a buffer and seal, reducing vibration transmission, while preventing dust and impurities from entering the installation area. Compared to the traditional single-bearing structure, the dual-bearing structure significantly improves the radial support stability of the gear shaft and effectively eliminates radial clearance. The shaft circlip 7 and the hole circlip 5 are used to axially position the bearing and thick gasket, respectively, to prevent axial movement during operation. The thick gasket, with its thicker structure, replaces the traditional thin gasket, eliminating the gap caused by thin gasket deformation, thereby reducing the torsional clearance of the assembly. The skeleton oil seal 3 and dust cover 2 prevent the lubricating oil from leaking from the housing 4 and prevent external impurities such as dust and moisture from entering the housing 4, ensuring proper lubrication and working environment for the gears and bearings. An oil cup 8 is located at the bottom of the housing 4, which is used to replenish lubricating oil to ensure good lubrication of the steering gear's internal components.

[0029] The above embodiments of the present invention are merely examples to clearly illustrate the present invention, but are not intended to limit the scope of protection of the present invention. All equivalent technical solutions also fall within the scope of the present invention. The scope of patent protection of the present invention should be defined by the claims.

Claims

1. A low torsional clearance vehicle obtuse-angle steering gear, comprising a housing (4), characterized in that: A first gear shaft (1) and a second gear shaft (11) meshing with each other are provided in the housing (4), the angle between the axis of the first gear shaft (1) and the axis of the second gear shaft (11) is an obtuse angle θ, each gear shaft is fixed to the housing (4) through two independent first bearings (10) and second bearings (12) to eliminate the radial clearance of the assembly and improve stability, a sealing assembly is provided between the first gear shaft (1), the second gear shaft (11) and the housing (4), a mounting flange (13) is integrated in the middle of the housing (4), the flange surface is parallel to the plane where the axis of the second gear shaft (11) is located, and intersects with the plane where the axis of the first gear shaft (1) is located, so as to achieve horizontal or vertical installation, and a rubber pad (9) is provided on the mounting flange (13) for shock absorption and noise reduction.

2. The low torsional clearance vehicle obtuse-angle steering gear according to claim 1, characterized in that: The sealing assembly comprises a spacer ring (6), a hole elastic retaining ring (5), and a skeleton oil seal (3) arranged in sequence along the axial direction, and dust covers (2) are provided on both end surfaces of the box body (4).

3. The low torsional clearance vehicle obtuse-angle steering gear according to claim 2, characterized in that: The spacer (6) is configured as a thick gasket with a thickness of more than 2 mm to eliminate the gap caused by the deformation of the thin gasket and reduce the torsional clearance of the angle steering assembly.

4. The low torsional clearance vehicle obtuse-angle steering gear according to claim 2, characterized in that: The lip of the skeleton oil seal (3) is provided with a dustproof cutting edge.

5. The low torsional clearance vehicle obtuse-angle steering gear according to claim 1, characterized in that: The two first bearings (10) are respectively arranged at the shaft shoulders of the first gear shaft (1) and the second gear shaft (11); a positioning step (41) is provided at the inner ring of the housing (4) corresponding to the first bearing (10); and a shaft elastic retaining ring (7) is provided in the shaft groove on one side of the second bearing (12).

6. The low torsional clearance vehicle obtuse-angle steering gear according to claim 1, characterized in that: The included angle θ between the axis of the first gear shaft (1) and the axis of the second gear shaft (11) is set to 100°-150°.

7. The low torsional clearance vehicle obtuse-angle steering gear according to claim 6, characterized in that: The included angle θ between the axis of the first gear shaft (1) and the axis of the second gear shaft (11) is set to 120°.

8. The low torsional clearance vehicle obtuse-angle steering gear according to claim 1, characterized in that: At least four mounting holes (131) are evenly distributed on the mounting flange (13).

9. The low torsional clearance vehicle obtuse-angle steering gear according to claim 1, characterized in that: An oil cup (8) is provided at the bottom of the box (4), and an oil passage directly leads to the gear meshing area.

10. The low torsional clearance vehicle obtuse-angle steering gear according to claim 1, characterized in that: The first gear shaft (1) and the second gear shaft (11) are both configured as an integral structure.

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