Electromagnetic power steering assembly and steering system

Abstract

The utility model relates to the technical field of automobile parts, and puts forward an electromagnetic power assisted steering assembly and steering system, wherein, an electromagnetic power assisted steering assembly includes: steering detection component, sets up on the steering gear housing, is used for detecting steering wheel rotation direction, power assisted component sets up on the steering gear housing, and with Steering cross bar magnetic force connects, is used for according to the direction electromagnetic drive steering cross bar relative the steering gear housing movement of steering wheel rotation direction, the utility model discloses steering detection component detects the direction of the driver to the steering wheel drive, at the same time, power assisted component exports the auxiliary power to steering cross bar in the mode of magnetic drive, thereby power assisted steering cross bar relative steering gear housing movement, realizes the purpose of automobile tire steering, compared with traditional motor output torque, power assisted component exports auxiliary force in the mode of magnetic drive, need not to configure motor, simple structure and no mechanical contact.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, and in particular to an electromagnetic power steering component and steering system. Background Technology

[0002] Electric power steering (EPS) systems control the motor to assist steering by adjusting the driver's real-time control of the steering wheel. This provides easy steering at low speeds and good road feel at high speeds, improving handling stability. Currently, EPS systems are mainly classified into column-assisted (C-EPS), single pinion-assisted (P-EPS), dual pinion-assisted (DP-EPS), and belt-assisted (RP-EPS).

[0003] Publication No. CN 106428201 A discloses a nested dual-rotor steering motor multi-mode steering system and control method, which realizes different torque outputs of the motor and controls the steering actuator to steer, thereby achieving multiple steering modes. However, in this technical solution, due to the need to arrange dual-rotor motors and supporting control systems, the overall weight of the steering system is large, the cost is high, and it is not easy to arrange.

[0004] Therefore, an electromagnetic power steering component and steering system are proposed to solve the technical problems of large overall weight and high cost of existing steering systems, so as to achieve the goal of low cost and lightweight. Utility Model Content

[0005] In view of this, the present invention proposes an electromagnetic power steering component and steering system to solve the technical problems of large overall weight and high cost of existing steering systems, so as to achieve the purpose of low cost and lightweight.

[0006] This utility model proposes an electromagnetic power steering assembly, which is disposed in a steering gear housing fixed on a vehicle frame. A steering crossbar that moves axially is disposed within the steering gear housing. The assembly also includes:

[0007] A steering detection component is disposed on the steering gear housing and is used to detect the steering wheel rotation direction;

[0008] An assist component is disposed on the steering gear housing and magnetically connected to the steering crossbar, for electromagnetically driving the steering crossbar to move relative to the steering gear housing according to the direction of steering wheel rotation.

[0009] Based on the above technical solutions, preferably, a number of permanent magnets are arranged at equal intervals on the steering crossbar;

[0010] The assist component includes several electromagnetic coils, which are spaced apart from each other on the steering gear housing along the axial direction of the steering gear housing. The spacing between two adjacent electromagnetic coils is adapted to the width of the permanent magnet.

[0011] Based on the above technical solutions, preferably, the magnetic poles of two adjacent permanent magnets are opposite;

[0012] The electromagnetic coils are divided into two groups, which are arranged opposite each other on both sides of the steering gear housing and are close to the two magnetic poles of the permanent magnet. The two electromagnetic coils are staggered and distributed.

[0013] Based on the above technical solutions, preferably, the assisting component further includes several iron cores, which are arranged one-to-one within the several electromagnetic coils to enhance the magnetic field of the several electromagnetic coils.

[0014] Based on the above technical solutions, preferably, a controller is also included, which is disposed on the steering gear housing. The controller is electrically connected to both the steering detection component and the plurality of electromagnetic coils, and is used to control the energization of the plurality of electromagnetic coils according to the electrical signal of the steering detection component.

[0015] Based on the above technical solutions, preferably, the steering detection component is configured as a torque sensor to detect the direction of rotation of the steering wheel.

[0016] On the other hand, this utility model also provides an electromagnetic steering system, comprising:

[0017] The vehicle frame and drive shaft, wherein the vehicle frame is equipped with the aforementioned electromagnetic power steering assembly;

[0018] The electromagnetic power steering assembly includes a steering gear housing and a steering crossbar. The steering gear housing is mounted on the vehicle frame. The steering crossbar is partially disposed within the steering gear housing and partially connected to the steering knuckle. A rack is provided on a portion of the steering crossbar located within the steering gear housing.

[0019] The drive shaft is rotatably mounted on the steering gear housing, with one end meshing with the rack and pinion and the other end connected to the steering wheel, for transmitting the torque of the steering wheel to the steering crossbar.

[0020] Based on the above technical solutions, preferably, each of the permanent magnet components includes a pair of permanent magnets and a fastener, and each of the permanent magnets is fixed to the steering crossbar by a fastener, with the magnetic poles of the two opposing permanent magnets being opposite.

[0021] Based on the above technical solutions, preferably, both ends of the steering gear housing are provided with sealing sleeves to seal the space inside the steering gear housing.

[0022] Based on the above technical solutions, preferably, it also includes a wiring harness assembly, which is disposed on the steering gear housing and is used to electrically connect the controller and several electromagnetic coils.

[0023] The electromagnetic power steering component and steering system provided by this utility model have the following advantages compared with the prior art:

[0024] (1) The steering detection component is used to detect the direction of the driver’s steering wheel drive. At the same time, the power assist component outputs auxiliary power to the steering crossbar in a magnetic drive manner, thereby assisting the steering crossbar to move relative to the steering gear housing and achieving the purpose of steering the car tires. Compared with the traditional motor output torque, the power assist component outputs auxiliary force in a magnetic drive manner, which does not require a motor, has a simple structure and no mechanical contact.

[0025] (2) The magnetic poles of two adjacent permanent magnets in the direction of the steering crossbar axis are opposite to each other. In this way, the electromagnetic coil located between the two permanent magnets can attract and repel the two adjacent permanent magnets respectively.

[0026] (3) The permanent magnets located on opposite sides of the steering crossbar in the radial direction have opposite magnetic poles. The permanent magnets on both sides attract each other and can be stably fixed on both sides of the steering crossbar. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a cross-sectional view of an electromagnetic power steering component according to the present invention.

[0029] Figure 2 for Figure 1 A magnified view of a portion of the image;

[0030] Figure 3 This is a simplified view showing the distribution of the electromagnetic coil and permanent magnet of this utility model.

[0031] Figure 4 This is a system diagram of the controller and electromagnetic coil of this utility model;

[0032] Figure 5 This is a schematic diagram of the electromagnetic steering system of this utility model.

[0033] Explanation of reference numerals in the attached drawings: 1. Steering detection component; 2. Power steering component; 21. Electromagnetic coil; 22. Iron core; 3. Controller; 4. Wiring harness assembly; 100. Steering gear housing; 200. Steering crossbar; 210. Permanent magnet; 211. Permanent magnet; 212. Fastener; 220. Rack; 300. Drive shaft. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0035] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model based on the specific circumstances.

[0036] In the description of the embodiments of this utility model, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0038] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0039] The following disclosure provides numerous different embodiments or examples for implementing various structures of the present invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention; however, those skilled in the art will recognize the applicability of other processes and / or the use of other materials.

[0040] The technical solution will now be explained. In existing solutions, the need to install a dual-rotor motor and a corresponding control system results in a heavy overall steering system, high cost, and difficulty in installation. Therefore, if... Figure 1 and Figure 2 As shown, this utility model provides an electromagnetic power steering assembly, which is disposed in a steering gear housing 100 fixed on a vehicle frame. A steering crossbar 200, which moves axially along the steering gear housing 100, is inserted inside the steering gear housing 100. Both ends of the steering crossbar 200 are connected to the steering knuckles of the vehicle wheels via ball joints. When the steering crossbar 200 moves axially relative to the steering gear housing 100, it synchronously drives the wheels to steer. An electromagnetic power steering assembly includes:

[0041] Steering detection component 1 is mounted on steering gear housing 100 and is used to detect the steering wheel rotation direction;

[0042] The power assist component 2 is disposed on the steering gear housing 100 and magnetically connected to the steering crossbar 200, and is used to electromagnetically drive the steering crossbar 200 to move relative to the steering gear housing 100 according to the direction of steering wheel rotation.

[0043] Steering detection component 1 is used to detect the direction of the driver's steering wheel drive. At the same time, power assist component 2 outputs auxiliary power to the steering crossbar 200 in a magnetically driven manner, thereby assisting the steering crossbar 200 to move relative to the steering gear housing 100, so as to achieve the purpose of steering of the car tires. Compared with the traditional motor output torque, the power assist component 2 outputs auxiliary force by magnetic drive, which does not require the configuration of a motor, has a simple structure and no mechanical contact.

[0044] like Figure 2 As shown, in order to ensure that the magnetic force effectively drives the steering crossbar 200, a number of permanent magnets 210 are arranged at equal intervals on the steering crossbar 200.

[0045] The power steering component 2 includes several electromagnetic coils 21, which are spaced apart from each other on the steering gear housing 100 along the axial direction of the steering gear housing 100. The spacing between two adjacent electromagnetic coils 21 is adapted to the width of the permanent magnet component 210.

[0046] When the steering crossbar 200 is driven by magnetic force, the magnetic fields generated by the energization of two adjacent electromagnetic coils 21 are kept opposite. In this way, the permanent magnet 210 on the steering crossbar 200 will be attracted by one electromagnetic coil 21 and repelled by the other electromagnetic coil 21. This causes all the electromagnetic coils 21 to drive the steering crossbar 200 in the same direction, so as to effectively assist the steering crossbar 200 with magnetic force.

[0047] like Figure 2 and Figure 3 To ensure continuous and stable driving of the steering crossbar 200, the magnetic poles of two adjacent permanent magnets 210 are opposite.

[0048] Several electromagnetic coils 21 are divided into two groups. The two groups of electromagnetic coils 21 are arranged opposite to each other on both sides of the steering gear housing 100 and are close to the two magnetic poles of the permanent magnet 210. The two electromagnetic coils 21 opposite to each other are staggered.

[0049] like Figure 3 As shown, the magnetic poles of two adjacent permanent magnets 210 in the axial direction of the steering crossbar 200 are opposite to each other. In this way, the electromagnetic coil 21 located between the two permanent magnets 210 can attract and repel the two adjacent permanent magnets 210 respectively.

[0050] More specifically, such as Figure 3 As shown, and in accordance with Figure 3 The orientation of the display is described as follows: Six electromagnetic coils 21 are arranged on the upper and lower sides of the steering crossbar 200. The three upper electromagnetic coils 21 are energized, and the magnetic poles of adjacent electromagnetic coils 21 are kept opposite. Therefore, once the three upper electromagnetic coils 21 are energized, each electromagnetic coil 21 will repel the permanent magnet 210 on its left side and attract the permanent magnet 210 on its right side, thereby following the... Figure 3All permanent magnets 210 are driven from right to left to assist the steering bar 200 in moving with magnetic force from right to left. After the three upper electromagnetic coils 21 attract the permanent magnets 210, the position of the steering bar 200 is translated from right to left. The three lower electromagnetic coils 21 are aligned with the gap between two adjacent permanent magnets 210, causing the three upper electromagnetic coils 21 to be de-energized and the three lower electromagnetic coils 21 to be energized. This allows the electromagnetic coils 21 to continue assisting the steering bar 200 in moving in the previous direction. The electromagnetic coils 21 on the upper and lower sides of the steering bar 200 are alternately energized until the steering bar 200 moves to the desired position, thus completing the power steering of the wheels.

[0051] Therefore, this application designs the distribution of electromagnetic coils 21 on the steering gear housing 100 so that the steering crossbar 200 can move continuously and effectively under the action of two sets of alternately distributed electromagnetic coils 21.

[0052] In order to increase the magnetic force of the electromagnetic coil 21 on the steering crossbar 200, the assist component 2 also includes several iron cores 22, which are arranged one-to-one in the electromagnetic coils 21 to enhance the magnetic field of the electromagnetic coils 21.

[0053] Specifically, the steering gear housing 100 has several mounting holes arranged radially around itself. The mounting holes are adapted to one end of the iron core 22. One end of each iron core 22 is embedded in the corresponding mounting hole, and the other end extends into the axial center of the electromagnetic coil 21. The iron core 22 enhances the auxiliary magnetic force of the electromagnetic coil 21 on the steering crossbar 200.

[0054] like Figure 5 As shown, the aforementioned electromagnetic power steering assembly also includes a controller 3, which is disposed on the steering gear housing 100. The controller 3 is electrically connected to both the steering detection component 1 and several electromagnetic coils 21, and is used to control the energization of several electromagnetic coils 21 according to the electrical signal of the steering detection component 1.

[0055] The steering detection component 1 is configured as a torque sensor to detect the direction of steering wheel rotation.

[0056] When the driver turns the steering wheel, the torque sensor can detect the angle and direction of the steering wheel rotation and transmit the detected electrical signal to the controller 3. Under the processing of the controller 3, the controller 3 adjusts the energizing sequence and number of times of several electromagnetic coils 21 according to the received electrical signal, which can play a role in stabilizing the steering of the steering crossbar 200.

[0057] The working principle of this electromagnetic power steering assembly is as follows: the torque sensor can detect the angle and direction of the steering wheel rotation; the controller 3 controls the direction of the current flowing into the electromagnetic coil 21 to ensure that the direction of the electromagnetic auxiliary force driving the steering link 200 is consistent with the direction of the steering wheel rotation; the controller then controls the number of electromagnetic coils 21 that are turned on to ensure that the magnitude of the electromagnetic auxiliary force can stably drive the steering link 200; finally, the electromagnetic coils 21 on different sides are alternately turned on and off to enable the electromagnetic auxiliary force to drive the steering link 200 to complete the steering.

[0058] like Figure 5 As shown, on the other hand, this utility model also provides an electromagnetic steering system, including:

[0059] The vehicle frame and drive shaft 300, wherein the aforementioned electromagnetic power steering assembly is provided on the vehicle frame;

[0060] The electromagnetic power steering assembly includes a steering gear housing 100 and a steering crossbar 200. The steering gear housing 100 is mounted on the vehicle frame. The steering crossbar 200 is partially disposed inside the steering gear housing 100 and partially connected to the steering knuckle. A rack 220 is provided on the portion of the steering crossbar 200 located inside the steering gear housing 100.

[0061] The drive shaft 300 is rotatably mounted on the steering gear housing 100. One end is engaged with the rack 220, and the other end is connected to the steering wheel. It is used to transmit the torque of the steering wheel to the steering crossbar 200.

[0062] When the driver turns the steering wheel, the torque of the steering wheel is transmitted to the drive shaft 300. The drive shaft 300 rotates synchronously with the steering wheel and pushes the steering crossbar 200 through the meshing of the rack and pinion drive. Under the synchronous action of the torque of the steering wheel and the electromagnetic power assist component 2, the steering crossbar 200 completes the movement relative to the steering gear housing 100.

[0063] like Figure 2 and Figure 3 As shown, in order to facilitate the fixing of the permanent magnet 210 to the steering crossbar 200, each permanent magnet 210 includes a pair of permanent magnets 211 and fasteners 212. Each permanent magnet 211 is fixed to the steering crossbar 200 by a fastener 212, and the magnetic poles of the two opposing permanent magnets 211 are opposite.

[0064] The permanent magnet 211 can be configured as a cube or ring with a through hole in the center. One end of the fastener 212 passes through the permanent magnet 211 and the steering crossbar 200 in sequence, and fixes the permanent magnet 211 to the steering crossbar 200. More specifically, the permanent magnets 211 located on opposite sides of the steering crossbar 200 in the radial direction have opposite magnetic poles, and the permanent magnets 211 on both sides attract each other, so that they can be stably fixed on both sides of the steering crossbar 200.

[0065] like Figure 1 As shown, to prevent external dust from entering the steering gear housing 100, sealing sleeves 110 are provided at both ends of the steering gear housing 100 to seal the space inside the steering gear housing 100. Under the action of the sealing sleeves 110, the stable meshing of the gear rack and pinion and the smooth driving of the electromagnetic power assist component 2 by the steering crossbar 200 can be ensured.

[0066] The aforementioned electromagnetic steering system also includes a wiring harness assembly 4, which is disposed on the steering gear housing 100 and is used to electrically connect the controller 3 and several electromagnetic coils 21.

[0067] To ensure that the steering gear housing 100 is flat on the outside, one end of the wiring harness assembly 4 is electrically connected to the corresponding electromagnetic coil 21, and the other end is electrically connected to the controller 3 to ensure stable control of each electromagnetic coil 21.

[0068] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An electromagnetic power steering assembly, characterized in that, A steering gear housing (100) fixed to the vehicle frame is provided, wherein a steering crossbar (200) that moves in the axial direction is disposed within the steering gear housing (100), and further includes: A steering detection component (1) is disposed on the steering gear housing (100) and is used to detect the steering wheel rotation direction; A power assist component (2) is disposed on the steering gear housing (100) and magnetically connected to the steering crossbar (200) for electromagnetically driving the steering crossbar (200) to move relative to the steering gear housing (100) according to the direction of steering wheel rotation.

2. The electromagnetic power steering assembly as described in claim 1, characterized in that, The steering crossbar (200) is provided with a number of permanent magnets (210) at equal intervals. The assist component (2) includes a plurality of electromagnetic coils (21) which are spaced apart from each other on the steering housing (100) along the axial direction of the steering housing (100), and the spacing between two adjacent electromagnetic coils (21) is adapted to the width of the permanent magnet (210).

3. The electromagnetic power steering assembly as described in claim 2, characterized in that, The magnetic poles of two adjacent permanent magnets (210) are opposite; The electromagnetic coils (21) are divided into two groups. The two groups of electromagnetic coils (21) are arranged opposite to each other on both sides of the steering housing (100) and are close to the two magnetic poles of the permanent magnet (210). The two electromagnetic coils (21) are staggered.

4. The electromagnetic power steering assembly as described in claim 2 or 3, characterized in that, The assisting component (2) also includes several iron cores (22), which are arranged one-to-one in the several electromagnetic coils (21) to enhance the magnetic field of the several electromagnetic coils (21).

5. The electromagnetic power steering assembly as described in claim 3, characterized in that, It also includes a controller (3) disposed on the steering gear housing (100). The controller (3) is electrically connected to both the steering detection component (1) and the plurality of electromagnetic coils (21) and is used to control the energization of the plurality of electromagnetic coils (21) according to the electrical signal of the steering detection component (1).

6. The electromagnetic power steering assembly as described in claim 3, characterized in that, The steering detection component (1) is configured as a torque sensor for detecting the direction of rotation of the steering wheel.

7. An electromagnetic steering system, characterized in that, include: A chassis and drive shaft (300), wherein the chassis is provided with an electromagnetic power steering assembly as described in any one of claims 2-6; The electromagnetic power steering assembly includes a steering gear housing (100) and a steering crossbar (200). The steering gear housing (100) is mounted on the vehicle frame. The steering crossbar (200) is partially disposed within the steering gear housing (100) and partially connected to the steering knuckle. A rack (220) is provided on a portion of the steering crossbar (200) located within the steering gear housing (100). The drive shaft (300) is rotatably mounted on the steering gear housing (100), with one end engaging with the rack (220) and the other end connected to the steering wheel, for transmitting the torque of the steering wheel to the steering crossbar (200).

8. The electromagnetic steering system as described in claim 7, characterized in that, Each of the permanent magnets (210) includes a pair of permanent magnets (211) and a fastener (212), each of the permanent magnets (211) being fixed to the steering crossbar (200) by a fastener (212), the two opposing permanent magnets (211) having opposite magnetic poles.

9. The electromagnetic steering system as described in claim 7, characterized in that, Both ends of the steering gear housing (100) are provided with sealing sleeves (110) to seal the space inside the steering gear housing (100).

10. The electromagnetic steering system as described in claim 7, characterized in that, It also includes a wiring harness assembly (4) disposed on the steering gear housing (100) for electrically connecting the controller (3) and several electromagnetic coils (21).

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