Steering structure with electronic assistance

Abstract

The utility model discloses a steering structure with electronic assistance, and facilitates to dismount and replace the steering gear and electronic power steering gear. The steering structure with electronic assistance comprises steering column, electronic power steering gear and steering gear which are connected in sequence. The electronic power steering gear and the steering gear are designed separately, and a first universal joint is arranged between the electronic power steering gear and the steering gear. The two ends of the first universal joint are coaxially connected with the output end of the electronic power steering gear and the input end of the steering gear respectively. A telescopic transmission shaft is arranged between the steering column and the electronic power steering gear. The two ends of the telescopic transmission shaft are respectively provided with a second universal joint and a third universal joint. The two ends of the second universal joint are coaxially connected with the lower end of the steering column and the upper end of the telescopic transmission shaft respectively. The two ends of the third universal joint are coaxially connected with the lower end of the telescopic transmission shaft and the input end of the electronic power steering gear respectively.

Description

Technical Field

[0001] This utility model belongs to the technical field of vehicle steering structure, and specifically refers to a steering structure with electronic power assistance. Background Technology

[0002] In the prior art, for example, CN118439091A discloses "A Steering Structure with Electronic Power Steering Gear", in which an electronic power steering system is set on the outer surface of the steering gear, and the electronic power steering system and the steering gear form an integrated structure.

[0003] Different vehicle models have different power and torque requirements. Using high-power and high-torque components in light-duty small vehicles would easily lead to overkill performance. When different vehicle models require different torque levels for their electronic power steering systems and / or steering gears, the entire system needs to be replaced, necessitating a complete overhaul and custom-made electronic power steering system, steering gear, and connecting mechanism. Furthermore, the electronic power steering system and steering gear are frequently damaged components during use; failure of either requires disassembly and replacement of the entire assembly, causing maintenance inconvenience. Overall, a one-piece structure results in a wide variety of assembly products, which is detrimental to mass production. Utility Model Content

[0004] The main purpose of this utility model is to provide a steering structure with electronic power steering, which solves the problems existing in the prior art and facilitates the replacement of the steering gear and electronic power steering system.

[0005] To achieve the above objectives, the solution of this utility model is: An electronically assisted steering structure includes a steering column, an electronically assisted steering unit, and a steering gear, which are sequentially connected. The electronically assisted steering unit and the steering gear are separate designs, with a first universal joint between them. The two ends of the first universal joint are coaxially connected to the output end of the electronically assisted steering unit and the input end of the steering gear, respectively. A telescopic drive shaft is provided between the steering column and the electronically assisted steering unit. The two ends of the telescopic drive shaft are respectively provided with a second universal joint and a third universal joint. The two ends of the second universal joint are coaxially connected to the lower end of the steering column and the upper end of the telescopic drive shaft, respectively. The two ends of the third universal joint are coaxially connected to the lower end of the telescopic drive shaft and the input end of the electronically assisted steering unit, respectively.

[0006] A pair of steering tie rods are symmetrically arranged on both sides of the steering gear; the steering tie rods include deformable protective sleeves located on the surface.

[0007] Preferably, a pair of wheels are symmetrically arranged on both sides of the steering gear, and the wheels on the same side are connected to the steering tie rod through the steering knuckle.

[0008] The steering column is coaxially connected to a steering wheel at its upper end.

[0009] After adopting the above technical solution, the present invention has the following technical effects: (1) This utility model separates the electronic power steering and the steering gear into independent parts. When selecting parts for different vehicle models, the electronic power steering and the steering gear can be selected from mature products from different manufacturers on the market according to the load of different vehicle models. By simply adjusting the spline size parameters of the input / output shafts of the electronic power steering and steering gear products from different manufacturers to match the universal joints, flexible assembly between electronic power steering and steering gear produced by different manufacturers can be achieved.

[0010] (2) The electronic power steering system can be flexibly adjusted between the steering column and the output end of the steering gear according to the vehicle load configuration, without changing the relative position of the steering column and the steering gear, which is conducive to the overall modular layout.

[0011] (3) When the position angle of the power line of the steering system changes due to the different sizes of the electronic power steering and steering gear components, and the change in the position of the electronic power steering, natural compensation can be achieved by adjusting the telescopic drive shaft connected to the electronic power steering. The positional deviation between the electronic power steering and the steering gear can be eliminated by multiple universal joints used in the structure.

[0012] (4) If any of the steering column, electronic power steering and steering gear in this utility model has a problem, they can be directly replaced individually, which helps to reduce maintenance costs and increase product flexibility. Attached Figure Description

[0013] Figure 1 This is a perspective view of a specific embodiment of the present utility model.

[0014] Explanation of icon numbers: 1-Steering column; 2-Electronic power steering; 3-Steering gear; 4-First universal joint; 5-Telescopic drive shaft; 6-Second universal joint; 7-Third universal joint; 8-Control device; 9-Steering tie rod; 10-Wheel; 11-Skate joint; 12-Steering wheel. Detailed Implementation

[0015] To further explain the technical solution of this utility model, the following detailed description is provided through specific embodiments.

[0016] refer to Figure 1 As shown, this utility model discloses a steering structure with electronic power steering, including a steering column 1, an electronic power steering unit 2, and a steering gear 3 connected in sequence. The electronic power steering 2 and the steering gear 3 are designed separately, with a first universal joint 4 between them. The two ends of the first universal joint 4 are coaxially connected to the output end of the electronic power steering 2 and the input end of the steering gear 3, respectively. A telescopic drive shaft 5 is provided between the steering column 1 and the electronic power steering 2. A second universal joint 6 and a third universal joint 7 are respectively provided at both ends of the telescopic drive shaft 5. The two ends of the second universal joint 6 are coaxially connected to the lower end of the steering column 1 and the upper end of the telescopic drive shaft 5, respectively. The two ends of the third universal joint 7 are coaxially connected to the lower end of the telescopic drive shaft 5 and the input end of the electronic power steering 2, respectively.

[0017] Through the above solution, this utility model separates the electronic power steering unit 2 and the steering gear 3 into independent components. When selecting components for different vehicle models, the electronic power steering unit 2 and the steering gear 3 can be selected from mature products from different manufacturers on the market according to the load of different vehicle models. Flexible assembly between electronic power steering units 2 and steering gear 3 from different manufacturers can be achieved simply by adjusting the spline dimensions of the input / output shafts of the electronic power steering units 2 and 3 from different manufacturers to match the universal joints. The electronic power steering unit 2 can be flexibly adjusted in position between the steering column 1 and the output end of the steering gear 3 according to the vehicle model load configuration without requiring any modifications to the steering column. The relative positions of the steering column 1 and the steering gear 3 facilitate a modular layout. When the power line position angle of the steering system changes due to the different sizes of the electronic power steering unit 2 and the steering gear 3, or changes in the position of the electronic power steering unit 2, natural compensation can be achieved by adjusting the electronic power steering unit 2 and its connected telescopic drive shaft 5. The positional deviation between the electronic power steering unit 2 and the steering gear 3 can be eliminated through multiple universal joints used within the structure. In this invention, if any one of the steering column 1, electronic power steering unit 2, or steering gear 3 has a problem, it can be directly replaced individually, which helps reduce maintenance costs and increases product flexibility.

[0018] The following are specific embodiments of the present invention.

[0019] Typically, the aforementioned electronic power steering system 2 includes transmission components such as a torque sensor, steering shaft, and pinion gear. When the steering shaft rotates, the torque sensor converts the relative angular displacement of the input and output shafts under the action of the torsion bar into an electrical signal, which is then transmitted to the ECU. The ECU determines the direction of motor rotation and the amount of power assistance based on the signals from the vehicle speed sensor and torque sensor, thereby completing real-time control of the power steering. Therefore, the aforementioned electronic power steering system 2 is connected to a control device 8 via a connecting cable. The control device 8 is usually located in the driver's cab and connects to the control panel for convenient user operation.

[0020] The aforementioned steering gear 3 is provided with a pair of steering tie rods 9 symmetrically on both sides; the steering tie rod 9 includes a deformable protective sleeve on its surface, which can be made of rubber so that it can be deformed by stretching, folding and extending as the steering tie rod 9 moves.

[0021] Furthermore, a pair of wheels 10 are symmetrically arranged on both sides of the aforementioned steering gear 3, and the wheels 10 on the same side are connected to the steering tie rod 9 through the steering knuckle 11.

[0022] The steering column 1 is coaxially connected to the upper end of the steering wheel 12, which is used by the user to input steering torque to the electronic power steering system 2.

[0023] The first universal joint 4, the second universal joint 6 and the third universal joint 7 mentioned above are all telescopic universal joints (cross-shaft telescopic universal joints), which are composed of accessories such as outer spline sleeve, inner spline shaft, universal joint fork, cross shaft, needle roller bearing, bearing cover, and dust cover. They have the following characteristics: (1) free extension and retraction, with length compensation; (2) inner and outer spline fit, with angle compensation; (3) inner and outer spline fit, with non-uniform speed compensation; (4) meshing transmission form, with direct transmission and high efficiency.

[0024] The above embodiments and figures are not intended to limit the product form and style of this utility model. Any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of this utility model.

Claims

1. A steering structure with electronic power assistance, characterized in that: It includes a steering column, an electronic power steering system, and a steering gear that are connected in sequence; The electronic power steering and the steering gear are designed separately, with a first universal joint between them. The two ends of the first universal joint are coaxially connected to the output end of the electronic power steering and the input end of the steering gear, respectively. A telescopic drive shaft is provided between the steering column and the electronic power steering system. A second universal joint and a third universal joint are respectively provided at both ends of the telescopic drive shaft. The two ends of the second universal joint are coaxially connected to the lower end of the steering column and the upper end of the telescopic drive shaft, respectively. The two ends of the third universal joint are coaxially connected to the lower end of the telescopic drive shaft and the input end of the electronic power steering system, respectively.

2. The electronically assisted steering structure as described in claim 1, characterized in that: A pair of steering tie rods are symmetrically arranged on both sides of the steering gear; the steering tie rods include deformable protective sleeves located on the surface.

3. The electronically assisted steering structure as described in claim 2, characterized in that: The steering gear has a pair of wheels symmetrically arranged on both sides, and the wheels on the same side are connected to the steering tie rod through the knuckles.

4. The electronically assisted steering structure as described in claim 1, characterized in that: The steering column is coaxially connected to a steering wheel at its upper end.

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