Automobile steering system

Abstract

The utility model discloses an automobile steering system which comprises a steering column, a motor power assisting system and a steering executing mechanism, the power assisting system comprises a power assisting motor, one side of the power assisting motor is connected with a speed reducer shell, the steering column is provided with a first fixing plate, and the bottom of the speed reducer shell is connected with a second fixing plate; the bottom of the second fixing plate is connected with a mounting base, and the controller is arranged on the mounting base. The steering execution mechanism comprises a side pull rod and a ball joint, the side pull rod is in threaded connection with the ball joint, and by the adoption of the automobile steering system, the assembly difficulty of the steering column, the controller and the steering pull rod is lowered, and the assembly efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of automotive steering technology, specifically, it relates to an automotive steering system. Background Technology

[0002] The steering column and controller in current automotive steering systems generally have poor connection performance and insufficient robustness, which affects the long-term operational reliability of the steering system. Furthermore, the length of the current steering tie rod structure is not easy to adjust, which means that the ball joint needs to be removed before the vehicle's toe-in can be adjusted when assembling it with the wheel.

[0003] Patent CN106218710B, published on August 28, 2018, discloses an automotive steering system comprising a drive steering unit and a power steering unit. The drive steering unit includes a steering column and a drive steering gear, with the steering column connected to the drive steering gear via a first electric mechanism. The drive steering gear is used to move the steering tie rod to adjust the rotation angle of the vehicle wheels. The power steering unit includes a second electric mechanism and a power steering gear, with the second electric mechanism connected to the power steering gear. However, this automotive steering system does not solve the aforementioned technical problems. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing an automotive steering system that reduces the assembly difficulty of the steering column, controller, and steering tie rod, and improves assembly efficiency.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] The automotive steering system includes a steering column, a motor power assist system, and a steering actuator. The power assist system includes a power assist motor, a reducer housing is connected to one side of the power assist motor, a first fixing plate is provided on the steering column, and a second fixing plate is connected to the bottom of the reducer housing. A mounting base is connected to the bottom of the second fixing plate, and a controller is located on the mounting base. The steering actuator includes a tie rod and a ball joint, and the tie rod and the ball joint are threaded together.

[0007] The mounting base includes a connecting plate and a snap-fit ​​plate. The controller includes a housing. The top of the connecting plate has an L-shaped structure and is bolted to a second fixing plate. The bottom of the mounting base has an inverted T-shaped structure and is bolted to the controller housing at both ends.

[0008] The outer shell is provided with locking blocks at both ends and the bottom, and the locking plate is provided with grooves corresponding to the locking blocks; the locking plate is provided with stop blocks on both sides, and the outer shell is provided with notches corresponding to the stop blocks on both sides.

[0009] The steering actuator also includes an intermediate shaft, the side tie rod is hinged to both ends of the intermediate shaft, the ball joint includes a connecting sleeve, the end of the side tie rod is provided with a screw, the screw is threadedly connected to the connecting sleeve, and the screw is provided with an adjusting nut, which is located on one side of the end of the connecting sleeve.

[0010] The power steering motor and controller are located on both sides of the steering column.

[0011] The first fixing plate is provided with two waist-shaped holes. The first fixing plate is provided with fixing flanges on both sides. The fixing flanges are provided with arc-shaped grooves in the middle, and the arc-shaped grooves are in contact with the outer wall of the steering column.

[0012] The second fixing plate has an L-shaped structure, and the bottom end of the second fixing plate is provided with a U-shaped groove, and there are two U-shaped grooves.

[0013] The top of the connecting plate is also provided with auxiliary fixing holes.

[0014] The technical effects of this utility model are as follows: The automotive steering system of this utility model improves the installation and fixing method of the steering column and controller, improves the installation stability of the steering column, ensures the high degree of firmness of the controller installation, guarantees the reliability of long-term operation, improves the assembly efficiency, and optimizes the connection method to make the length of the side tie rod and ball joint adjustable. The front toe of the whole vehicle can be adjusted without disassembling the ball joint, which reduces the difficulty of vehicle assembly. Attached Figure Description

[0015] This manual includes the following figures, which illustrate the following:

[0016] Figure 1 This is a structural schematic diagram of the automotive steering system of this utility model;

[0017] Figure 2-1 and Figure 2-2 This is a schematic diagram of a partial structure on the steering column;

[0018] Figure 3 This is a schematic diagram of the connection between the side tie rod and the ball joint;

[0019] Figure 4 This is a structural diagram of the mounting base;

[0020] Figure 5 This is a schematic diagram of the controller housing.

[0021] Figure 6 This is a structural schematic diagram of the first fixed plate.

[0022] The markings in the diagram are as follows: 1. Steering column; 11. Power steering motor; 12. Reducer housing; 2. Intermediate shaft; 21. Side tie rod; 22. Ball joint; 23. Screw; 24. Connecting sleeve; 25. Adjusting nut; 26. Dust cover; 27. Bushing; 3. Mounting base; 31. Connecting plate; 32. Clip plate; 33. Groove; 34. Auxiliary fixing hole; 35. Stop block; 4. Controller; 41. Housing; 42. Clip block; 43. Notch; 5. First fixing plate; 51. Waist-shaped hole; 52. Fixing flange; 53. Arc groove; 6. Second fixing plate; 61. U-shaped groove. Detailed Implementation

[0023] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, in order to help those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of this invention, and to facilitate its implementation.

[0024] like Figure 1 As shown, the automotive steering system includes a steering column 1, a motor power assist system, and a steering actuator. The power assist system includes a power assist motor 11, with a reducer housing 12 connected to one side of the power assist motor 11. A first fixing plate 5 is provided on the steering column 1, and a second fixing plate 6 is connected to the bottom of the reducer housing 12. A mounting base 3 is connected to the bottom of the second fixing plate 6, and a controller 4 is mounted on the mounting base 3. The steering actuator includes a side tie rod 21 and a ball joint 22, which are threadedly connected.

[0025] The power steering motor 11 is arranged on the steering column 1, the reducer housing 12 is also arranged on the steering column 1, the second fixing plate 6 is located at the bottom of the reducer housing 12, the second fixing plate 6 is arranged on the steering column 1, the first fixing plate 5, the second fixing plate 6 and the connecting plate 31 are all sheet metal structures, the steering column 1 is connected to the vehicle body through two fixing plates and body bolts, and the controller 4 is installed on the steering column 1 through a sheet metal piece.

[0026] like Figure 4As shown, the mounting base 3 includes a connecting plate 31 and a snap-fit ​​plate 32, and the controller 4 includes a housing 41. The top of the connecting plate 31 has an L-shaped structure, and the top of the connecting plate 31 is bolted to the second fixing plate 6. The bottom of the mounting base 3 has an inverted T-shaped structure, and both ends of the bottom of the mounting base 3 are bolted to the housing of the controller 4. The snap-fit ​​plate 32 installs the housing of the controller 4 through snap-fit ​​and limiting. The connecting plate 31 is connected to the housing of the controller 4 by bolts. The connecting plate 31 is also indirectly connected to the vehicle body through the second fixing plate 6, thereby further improving the installation stability of the controller 4. The number of connecting parts used for installing the controller housing 41 is small, and only two bolts are needed to ensure the installation is firm. Before the assembly process, the controller housing 41 can be pre-fixed to the mounting base 3 as a whole. During the assembly process, only the connecting plate 31 and the second fixing plate 6 need to be fixed by bolts, thereby reducing the installation difficulty and improving the assembly efficiency while ensuring the assembly is firm.

[0027] like Figures 2-1 to 4 As shown, the outer casing 41 has locking blocks 42 at both ends and the bottom. The locking plate 32 has grooves 33 corresponding to the locking blocks 42. The locking plate 32 has stops 35 on both sides, and the outer casing 41 has notches 43 on both sides corresponding to the stops 35. There are four locking blocks 42, which cooperate with the grooves 33 to stably fix the outer casing 41 on the locking plate 32. The stops 35 and notches 43 further limit the movement. The outer casing 41 is pre-stable on the locking plate 32 through the above structure, which provides reliable protection for the internal components of the controller 4 and also reduces the assembly difficulty of the controller 4.

[0028] like Figure 1 and Figure 3As shown, the steering actuator also includes an intermediate shaft 2, with side tie rods 21 hinged to both ends of the intermediate shaft 2. A ball joint 22 includes a connecting sleeve 24. A screw 23 is provided at the end of the side tie rod 21, and the screw 23 is threadedly connected to the connecting sleeve 24. An adjusting nut 25 is provided on the screw 23, located on one side of the end of the connecting sleeve 24. Dust covers 26 are provided at both the connection end of the intermediate shaft 2 to the steering column 1 and the connection end to the side tie rod 21. Multiple bushings 27 for connection to the rocker arm or follower arm are also provided on the intermediate shaft 2. The steering actuator is bolted to the suspension system subframe, and the screw 23 of the side tie rod 21 is threadedly connected to the ball joint 22 assembly. During assembly and adjustment, each side tie rod 21 only needs to have its corresponding adjusting nut 25 loosened, and then tightened again according to the thread fit length between the side tie rod 21 and the ball joint 22 assembly to quickly complete the adjustment. Therefore, the ball joint 22 can be pre-installed on the vehicle body during installation, and there is no need to remove the ball joint 22 from the wheel again during adjustment. The adjustment method is convenient and quick, reducing the difficulty of toe-in adjustment, greatly reducing labor time, and improving the efficiency of assembly, adjustment, and maintenance. Furthermore, with the above-mentioned detachable connection method, if the side tie rod 21 or ball joint 22 is damaged, only the corresponding part needs to be replaced, saving the high maintenance cost of replacing the whole assembly.

[0029] like Figure 1 As shown, the power steering motor 11 and the controller 4 are located on both sides of the steering column 1. The above structure avoids the centralized installation of the power steering motor 11 and the controller 4, and avoids excessive size, which would increase the difficulty of interior layout and affect the spatial arrangement of nearby components.

[0030] like Figure 6 As shown, the first fixing plate 5 has two oblong holes 51. Fixing flanges 52 are provided on both sides of the first fixing plate 5, and an arc-shaped groove 53 is provided in the middle of the fixing flange 52, which contacts the outer wall of the steering column 1. The oblong holes 51 have adjustment margins, facilitating the installation and adjustment of the connecting parts and the vehicle body during assembly. The fixing flanges 52 not only act as reinforcing ribs to improve the structural strength of the first fixing plate 5, but also have an arc-shaped groove 53 for contacting the outer wall of the steering column 1, increasing the contact area between the two and ensuring a firm and reliable weld.

[0031] like Figure 2-1 As shown, the second fixing plate 6 has an L-shaped structure, and the bottom end of the second fixing plate 6 is provided with a U-shaped groove 61, of which there are two. The U-shaped groove 61 is used to install bolts to connect with the vehicle body. The open end of the U-shaped groove 61 faces downward, so that the bolts can be directly installed along the opening.

[0032] like Figure 2-2As shown, the top of the connecting plate 31 is also provided with an auxiliary fixing hole 34. In order to further improve the installation reliability of the connecting plate 31, the auxiliary fixing hole 34 increases the mounting point between it and the second fixing plate 6, forming a two-point connection, and at the same time, it also serves to prevent rotation.

[0033] The automotive steering system improves the installation and fixing method of the steering column 1 and controller 4, enhancing the installation stability of the steering column 1 and ensuring the high degree of secure installation of the controller 4, thus guaranteeing long-term operational reliability and improving assembly efficiency. Furthermore, it optimizes the connection method by using threaded connections to achieve adjustable lengths of the side tie rod 21 and ball joint 22, allowing for adjustment of the vehicle's toe-in without disassembling the ball joint 22, thereby reducing the difficulty of vehicle assembly.

[0034] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention; or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A vehicle steering system, comprising a steering column (1), a motor power assist system, and a steering actuator, wherein the power assist system includes a power assist motor (11), and a reducer housing (12) is connected to one side of the power assist motor (11), characterized in that: The steering column (1) is provided with a first fixing plate (5), and the bottom of the reducer housing (12) is connected to a second fixing plate (6); the bottom of the second fixing plate (6) is connected to a mounting base (3), and the controller (4) is located on the mounting base (3); the steering actuator includes a side tie rod (21) and a ball joint (22), and the side tie rod (21) and the ball joint (22) are threaded together.

2. The automobile steering system according to claim 1, characterized in that: The mounting base (3) includes a connecting plate (31) and a snap-fit ​​plate (32). The controller (4) includes a housing (41). The top of the connecting plate (31) is an L-shaped structure. The top of the connecting plate (31) is bolted to the second fixing plate (6). The bottom of the mounting base (3) is an inverted T-shaped structure. The two ends of the bottom of the mounting base (3) are bolted to the housing of the controller (4).

3. The automobile steering system according to claim 2, characterized in that: The outer shell (41) is provided with locking blocks (42) at both ends and the bottom. The locking plate (32) is provided with grooves (33) corresponding to the locking blocks (42). The locking plate (32) is provided with stops (35) on both sides. The outer shell (41) is provided with notches (43) corresponding to the stops (35) on both sides.

4. The automobile steering system according to claim 3, characterized in that: The steering actuator also includes an intermediate shaft (2), the side tie rod (21) is hinged to both ends of the intermediate shaft (2), the ball joint (22) includes a connecting sleeve (24), the end of the side tie rod (21) is provided with a screw (23), the screw (23) is threadedly connected to the connecting sleeve (24), the screw (23) is provided with an adjusting nut (25), and the adjusting nut (25) is located on one side of the end of the connecting sleeve (24).

5. The automobile steering system according to any one of claims 1-4, characterized in that: The power steering motor (11) and controller (4) are located on both sides of the steering column (1).

6. The automobile steering system according to claim 5, characterized in that: The first fixing plate (5) is provided with a waist-shaped hole (51), and there are two waist-shaped holes (51). The first fixing plate (5) is provided with fixing flanges (52) on both sides. The fixing flanges (52) are provided with an arc groove (53) in the middle. The arc groove (53) is in contact with the outer wall of the steering column (1).

7. The automobile steering system according to claim 6, characterized in that: The second fixing plate (6) has an L-shaped structure and a U-shaped groove (61) is provided at the bottom end of the second fixing plate (6). There are two U-shaped grooves (61).

8. The automobile steering system according to claim 2, characterized in that: The top of the connecting plate (31) is also provided with auxiliary fixing holes (34).

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