A low-torque-gap vehicle use obtuse angle steering gear

Abstract

The utility model discloses a low obtuse angle steering gear for vehicle of torsion clearance, related angle steering gear technical field, including the box, the box is provided with the first gear shaft and second gear shaft of intermeshing, the included angle between the axis of first gear shaft and the axis of second gear shaft is obtuse angle theta, and each gear shaft is fixed in the box through two independent first bearing, second bearing, to eliminate the radial clearance of assembly, be provided with sealing assembly between first gear shaft, second gear shaft and the box respectively, the middle part integrated mounting flange of box, can realize horizontal or vertical installation. The utility model discloses compact structure can adapt to the working scene of need obtuse angle transmission, improve steering flexibility, set up the mounting flange in the middle part of box, can realize horizontal or vertical installation, improve adaptability, adopt double bearing and thick gasket structure, effectively reduce the torsion clearance of assembly, promote the transmission accuracy and response speed of steering system.

Description

Technical Field

[0001] This utility model relates to the field of angle steering technology, and in particular to an obtuse angle steering gear for vehicles with low torsional clearance. Background Technology

[0002] The steering gear is a core component of the automotive 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 reveals several limitations under certain conditions: Firstly, when the internal space is complex, the bottom space is occupied by other components, or the bottom mounting surface is difficult to access, bottom-mounted steering gears cannot be easily installed and maintained. Secondly, for some vehicles with special requirements for center of gravity distribution and spatial layout, bottom mounting may lead to instability or fail to meet the needs of compact design. In addition, in existing technologies, the input and output shafts are mostly set at right angles, making it difficult to adapt to special working scenarios requiring obtuse angle transmission and failing to meet diverse mechanical transmission needs. Traditional steering gears often use a single bearing structure with thin shims for clearance adjustment; however, the single bearing structure has poor stability under radial loads and is prone to radial clearance. At the same time, thin shims are prone to deformation during long-term use, leading to increased torsional clearance and affecting the transmission accuracy and response speed of the steering system. Summary of the Invention

[0003] The purpose of this invention is to solve the above-mentioned technical problems and provide an angle steering gear with an obtuse angle between the input shaft and the output shaft and low torsional clearance, thereby improving the stability and transmission accuracy of the steering system.

[0004] To achieve the above technical objectives and requirements, the technical solution adopted by this utility model is as follows: a low-torsional-clearance obtuse-angle steering gear for vehicles, comprising a housing, wherein a first gear shaft and a second gear shaft are disposed within the housing and mesh with each other, the angle between the axis of the first gear shaft and the axis of the second gear shaft being an obtuse angle θ, each gear shaft being fixed to the housing by two independent first bearings and second bearings to eliminate radial clearance of the assembly and improve stability, sealing components are respectively provided between the first gear shaft, the second gear shaft and the housing, and a mounting flange is integrated in the middle of the housing, the flange surface being parallel to the plane containing the axis of the second gear shaft and intersecting the plane containing the axis of the first gear shaft, enabling horizontal or vertical installation, and a rubber pad is provided on the mounting flange for vibration damping and noise reduction.

[0005] Preferably, the sealing assembly includes a spacer ring, an elastic retaining ring for the hole, and a skeleton oil seal arranged sequentially along the axial direction, and dust covers are provided on both ends of the housing.

[0006] Preferably, the spacer ring is a thick shim with a thickness of 2mm or more to eliminate the gap caused by the deformation of the thin shim and reduce the torsional clearance of the steering gear 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 disposed at the shoulders of the first gear shaft and the second gear shaft, the inner ring of the housing is provided with a positioning step corresponding to the first bearing, and an elastic retaining ring for the shaft is provided in the shaft groove on one side of the second bearing.

[0009] Preferably, the included 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, the mounting flange has at least four mounting holes evenly distributed on it.

[0011] Preferably, the bottom of the housing is provided with an oil cup, and the oil passage leads directly to the gear meshing area.

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

[0013] Compared with the traditional structure, the beneficial effects of this utility model are: 1. This utility model has a compact structure and is easy to install. The included angle between the axes of the two gear shafts is set to an obtuse angle of 120°, which can adapt to working scenarios that require obtuse angle transmission and improve steering flexibility.

[0014] 2. The mounting flange is located in the middle of the housing, and the rubber gasket on the flange face improves the stability and sealing of the angle steering gear installation, reduces vibration transmission, and allows for horizontal or vertical installation, thus improving adaptability.

[0015] 3. The adoption of a 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 shims instead of traditional thin shims avoids the clearance caused by the deformation of thin shims, reduces the torsional clearance of the assembly, and improves the transmission accuracy and response speed of the steering system.

[0016] 4. The inclusion of a skeleton oil seal and dust cover ensures lubrication and cleanliness inside the angle steering gear, extending the service life of the parts; the oil cup facilitates the replenishment of lubricating oil. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is the left view of the present invention; Figure 3This is a top view of the present invention; In the diagram: 1. First gear shaft, 2. Dust cover, 3. Oil seal, 4. Housing, 41. Positioning step, 5. Elastic retaining ring for the hole, 6. Spacer, 7. Elastic retaining ring for the shaft, 8. Oil cup, 9. Rubber pad, 10. First bearing, 11. Second gear shaft, 12. Second bearing, 13. Mounting flange, 131. Mounting hole. Detailed Implementation

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

[0019] See attached document Figure 1 A low-torsional-backlash obtuse-angle steering gear for vehicles includes a housing 4. A first gear shaft 1 and a second gear shaft 11 mesh with each other within 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 by two independent first bearings 10 and second bearings 12 to eliminate radial backlash and improve stability. Sealing assemblies are respectively 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 face is parallel to the plane containing the axis of the second gear shaft 11 and intersects the plane containing the axis of the first gear shaft 1, enabling horizontal or vertical installation. A rubber pad 9 is provided on the mounting flange 13 for vibration damping and noise reduction.

[0020] In this preferred embodiment, the sealing assembly includes a spacer 6, an elastic retaining ring 5 for holes, and a skeleton oil seal arranged sequentially along the axial direction, and dust covers 2 are provided on both ends of the housing 4.

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

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

[0023] In this preferred embodiment, 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°, 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 housing 4, and the oil passage is directly connected 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 automotive steering systems.

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

[0028] In practical 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 located in the middle of the housing 4, with its flange face intersecting the plane of the first gear shaft 1 axis and parallel to the axis of the second gear shaft 11. This allows the two shafts to be positioned on either side 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 face of the mounting flange 13 is equipped with a rubber gasket 9, which serves as a buffer and seal, reducing vibration transmission and preventing dust and impurities from entering the mounting 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 retaining ring 7 and the bore retaining ring 5 are used for axial positioning of the bearing and the thick shim, respectively, preventing axial movement during operation. The thick shim uses a thicker structure, replacing the traditional thin shim, which avoids clearance caused by the deformation of the thin shim, thereby reducing the torsional clearance of the assembly. The skeleton oil seal 3 and the dust cover 2 prevent lubricating oil leakage from the housing 4, while also preventing external dust, moisture, and other impurities from entering the housing 4, ensuring normal lubrication and a suitable working environment for the gears and bearings. An oil cup 8 is located at the bottom of the housing 4, used to replenish lubricating oil into the housing, ensuring good lubrication of the internal parts of the steering gear.

[0029] The above embodiments of this utility model are merely examples to clearly illustrate this utility model, and are not intended to limit the scope of protection of this utility model. All equivalent technical solutions also fall within the scope of this utility model, and the patent protection scope of this utility model should be defined by each claim.

Claims

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

2. The obtuse-angle steering gear for vehicles with low torsional clearance according to claim 1, characterized in that: The sealing assembly includes a spacer (6), a hole elastic retaining ring (5), and a skeleton oil seal arranged sequentially along the axial direction. Dust covers (2) are provided on both ends of the housing (4).

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

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

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

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

9. The obtuse-angle steering gear for vehicles with low torsional clearance according to claim 1, characterized in that: The bottom of the housing (4) is provided with an oil cup (8), and the oil passage is directly connected to the gear meshing area.

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

Images