Steering structure with electronic power-assisted steering gear box

Abstract

The invention discloses a steering structure with an electronic power-assisted steering gear box, which is characterized in that the outer surface of the steering gear box is fixedly connected with a motor seat, the outer surface of the motor seat is fixedly connected with a power-assisted steering motor, and the outer surface of the steering gear box is fixedly connected with a gear rack reversing seat; a steering rod is rotationally connected to the interior of the gear rack reversing seat, and a tooth cylinder is arranged on the upper surface of the steering rod; by controlling disconnection and connection between the disconnection rod and the steering rod, the steering structure can achieve disconnection of the steering wheel and the steering gear box in an automatic driving mode of the vehicle, and the situation that the steering wheel hits hands during automatic driving is avoided. Through the design that a disconnecting rod and a steering rod can be disconnected and the arrangement of a collision hitting rod and a wedge-shaped collision block, when a vehicle collides, the collision hitting rod and the wedge-shaped collision block collide with each other, so that the disconnecting rod and the steering rod fail to be connected and deform, and hard connection between the disconnecting rod and the steering rod is changed; and the safety of a driver is effectively protected.

Description

Technical Field

[0001] The present invention relates to the technical field of steering gears, and particularly relates to a steering structure with an electronic power steering gear. Background Art

[0002] In the technical field of steering gears, with the rapid development of the automotive industry, the demand for vehicle intelligence and safety is increasing day by day. When facing new driving scenarios and requirements, traditional steering structures gradually expose some limitations. In the autonomous driving mode, traditional steering structures cannot effectively disconnect the connection between the steering wheel and the steering gear. When the vehicle is in the autonomous driving state, if the autonomous driving system performs a steering operation in case of an emergency, the steering wheel may rotate accordingly, which is likely to hit the hands, causing harm to the driver and passengers and seriously affecting the driving experience and safety. Most of the existing steering structures are hard connections. When a vehicle collides, the impact force will be directly transmitted to the steering wheel and the driver. Due to the lack of an effective buffering and disconnecting mechanism, this hard connection greatly increases the risk of harm to the driver and is difficult to provide reliable safety protection for the driver at the moment of collision, failing to meet the high standards of modern vehicle collision safety performance requirements.

[0003] In summary, the existing steering structures of steering gears have obvious deficiencies in terms of autonomous driving adaptability and collision safety. There is an urgent need for a new type of steering structure with an electronic power steering gear to solve the above technical problems and improve the overall performance and safety of the vehicle. Therefore, this solution proposes a steering structure with an electronic power steering gear. Summary of the Invention

[0004] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art, and provide a steering structure with an electronic power steering gear. By setting a support and a disconnecting rod installed on the support and capable of moving up and down controlled by a servo motor, by controlling the disconnection and connection between the disconnecting rod and the steering rod, the steering structure can achieve the disconnection between the steering wheel and the steering gear in the vehicle's autonomous driving mode, avoiding the situation of the steering wheel hitting the hands during autonomous driving. Through the detachable design between the disconnecting rod and the steering rod, and by setting a collision rod and a wedge-shaped collision block, when the vehicle collides, the collision rod and the wedge-shaped collision block impact each other, so that the connection between the disconnecting rod and the steering rod fails and deforms, changing the hard connection with the steering column, effectively protecting the safety of the driver.

[0005] The present invention also provides a steering structure with an electronic power steering gear as described above, including: a steering gear, a motor seat is fixedly connected to the outer surface of the steering gear, a power steering motor is fixedly connected to the outer surface of the motor seat, a gear-rack reversing seat is fixedly connected to the outer surface of the steering gear, a steering rod is rotatably connected inside the gear-rack reversing seat, and a toothed cylinder is provided on the upper surface of the steering rod;

[0006] A support, a chute is fixedly connected to the outer surface of the support, a movable machine base is slidably connected inside the chute, a servo motor is fixedly connected to the outer surface of the movable machine base, an abutting seat is fixedly connected to the outer surface of the support, a telescopic ejector rod is fixedly connected to the outer surface of the abutting seat, the output end of the telescopic ejector rod is fixedly connected to the movable machine base, a sliding sleeve is fixedly connected to the outer surface of the support, a disconnecting rod is slidably connected inside the sliding sleeve, a sleeve gear is fixedly connected to the lower end surface of the disconnecting rod, the sleeve gear is meshed with a toothed cylinder, a collision striking rod is fixedly connected to the outer surface of the gear-rack reversing seat, a wedge-shaped collision block is fixedly connected to the outer surface of the support, an inclined rack is arranged on the outer surface of the disconnecting rod, and the output end of the servo motor is meshed with the inclined rack through a worm.

[0007] According to a steering structure with an electronic power steering gear provided by the present invention, a telescopic universal joint is fixedly connected to the upper end surface of the disconnecting rod, and one end of the telescopic universal joint is fixedly connected to a steering link.

[0008] According to a steering structure with an electronic power steering gear provided by the present invention, a connecting column is fixedly connected to the outer surface of the support, and the support is connected to the vehicle body through the connecting column.

[0009] According to a steering structure with an electronic power steering gear provided by the present invention, a guiding inclined surface is arranged at the front end of the sleeve gear.

[0010] According to a steering structure with an electronic power steering gear provided by the present invention, a steering rack is arranged inside the steering gear, a first steering tie rod is movably connected to the left side of the steering gear, the first steering tie rod is connected to the steering rack, the output end of the power steering motor is connected to the steering rack, and the steering rod is connected to the steering rack.

[0011] According to a steering structure with an electronic power steering gear provided by the present invention, a second steering tie rod is movably connected to the right side of the steering gear, and the second steering tie rod is connected to the steering rack.

[0012] According to a steering structure with an electronic power steering gear provided by the present invention, a first protective cover is fixedly connected to the left side surface of the steering gear, and the first protective cover is fixedly connected to the outer surface of the first steering tie rod.

[0013] According to a steering structure with an electronic power steering gear provided by the present invention, a second protective cover is fixedly connected to the right side surface of the steering gear, and the second protective cover is fixedly connected to the outer surface of the second steering tie rod.

[0014] According to a steering structure with an electronic power steering gear provided by the present invention, an installation bracket is fixedly connected to the outer surface of the steering gear, and the steering gear is connected to the vehicle body through the installation bracket.

[0015] According to a steering structure with an electronic power steering gear provided by the present invention, the upper surface of the collision rod is an inclined surface, and the collision rod abuts against the wedge-shaped collision block.

[0016] Compared with the prior art, in a steering structure with an electronic power steering gear of the present invention, by providing a support and a disconnecting rod installed on the support and capable of moving up and down under the control of a servo motor, by controlling the disconnection and connection between the disconnecting rod and the steering rod, the steering structure can be made to disconnect the steering wheel from the steering gear in the vehicle's automatic driving mode, avoiding the situation of the steering wheel hitting the hand during automatic driving.

[0017] Compared with the prior art, in a steering structure with an electronic power steering gear of the present invention, through the detachable design between the disconnecting rod and the steering rod, and by providing a collision rod and a wedge-shaped collision block, when the vehicle collides, the collision rod and the wedge-shaped collision block impact each other, so that the connection between the disconnecting rod and the steering rod fails and deforms, changing the hard connection with the steering column, effectively protecting the safety of the driver. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below in conjunction with the drawings and embodiments;

[0019] Figure 1 It is the overall structure diagram of a steering structure with an electronic power steering gear of the present invention;

[0020] Figure 2 It is the side view of a steering structure with an electronic power steering gear of the present invention;

[0021] Figure 3 It is the rear view of a steering structure with an electronic power steering gear of the present invention;

[0022] Figure 4 It is the bottom view of a steering structure with an electronic power steering gear of the present invention;

[0023] Figure 5 It is the schematic diagram of the disconnecting rod structure of a steering structure with an electronic power steering gear of the present invention.

[0024] Legend Explanation:

[0025] 1. Steering gear; 2. Motor base; 3. Power steering motor; 4. Mounting bracket; 5. First shield; 6. First steering tie rod; 7. Second shield; 8. Second steering tie rod; 9. Gear-rack reversing seat; 10. Steering rod; 11. Disconnecting rod; 12. Support; 13. Telescopic universal joint; 14. Steering link; 15. Connecting column; 16. Sliding sleeve; 17. Inclined rack; 18. Sleeve gear; 19. Servo motor; 20. Movable base; 21. Wedge-shaped collision block; 22. Collision rod; 23. Tooth cylinder; 24. Guide slope; 25. Chute; 26. Telescopic ejector rod; 27. Contact seat. Detailed implementation mode

[0026] This part will describe the specific embodiments of the present invention in detail. The preferred embodiments of the present invention are shown in the drawings. The function of the drawings is to supplement the description of the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the protection scope of the present invention.

[0027] Referring to Figures 1-5 , an embodiment of the present invention is a steering structure with an electronic power steering gear, which includes: a steering gear 1, a motor base 2 fixedly connected to the outer surface of the steering gear 1, a power steering motor 3 fixedly connected to the outer surface of the motor base 2, a gear-rack reversing seat 9 fixedly connected to the outer surface of the steering gear 1, a steering rod 10 rotatably connected inside the gear-rack reversing seat 9, and a tooth cylinder 23 provided on the upper surface of the steering rod 10; a support 12, a chute 25 fixedly connected to the outer surface of the support 12, a movable base 20 slidably connected inside the chute 25, a servo motor 19 fixedly connected to the outer surface of the movable base 20, a contact seat 27 fixedly connected to the outer surface of the support 12, a telescopic ejector rod 26 fixedly connected to the outer surface of the contact seat 27, the output end of the telescopic ejector rod 26 being fixedly connected to the movable base 20, a sliding sleeve 16 fixedly connected to the outer surface of the support 12, a disconnecting rod 11 slidably connected inside the sliding sleeve 16, a sleeve gear 18 fixedly connected to the lower end surface of the disconnecting rod 11, and a guide slope 24 provided at the front end of the sleeve gear 18.

[0028] The sleeve gear 18 is meshed and connected with the tooth cylinder 23, a collision rod 22 is fixedly connected to the outer surface of the gear-rack reversing seat 9, a wedge-shaped collision block 21 is fixedly connected to the outer surface of the support 12, an inclined rack 17 is provided on the outer surface of the disconnecting rod 11, and the output end of the servo motor 19 is meshed and connected with the inclined rack 17 through a worm. A telescopic universal joint 13 is fixedly connected to the upper end surface of the disconnecting rod 11, and one end of the telescopic universal joint 13 is fixedly connected to a steering link 14. A connecting column 15 is fixedly connected to the outer surface of the support 12, and the support 12 is connected to the vehicle body through the connecting column 15. The upper surface of the collision rod 22 is an inclined surface, and the collision rod 22 is in contact with the wedge-shaped collision block 21.

[0029] Inside the steering gear 1, there is a steering rack. On the left side of the steering gear 1, a first steering tie rod 6 is movably connected. The first steering tie rod 6 is connected to the steering rack. The output end of the power steering motor 3 is connected to the steering rack, and the steering rod 10 is connected to the steering rack. On the right side of the steering gear 1, a second steering tie rod 8 is movably connected. The second steering tie rod 8 is connected to the steering rack. On the left surface of the steering gear 1, a first shield 5 is fixedly connected. The first shield 5 is fixedly connected to the outer surface of the first steering tie rod 6. On the right surface of the steering gear 1, a second shield 7 is fixedly connected. The second shield 7 is fixedly connected to the outer surface of the second steering tie rod 8. On the outer surface of the steering gear 1, a mounting bracket 4 is fixedly connected. The steering gear 1 is connected to the vehicle body through the mounting bracket 4.

[0030] Working principle: The working process of this steering structure involves various working conditions. In different driving scenarios, each component cooperates with each other to achieve corresponding functions. The specific principle is as follows:

[0031] Normal driving condition: When the vehicle is driving normally, the power steering motor 3 is in a working state. The driver turns the steering wheel, and the torque is transmitted through the steering rod 10 to the steering rack inside the steering gear 1. The power steering motor 3 outputs a corresponding assist torque according to the vehicle speed and the steering wheel rotation angle information, which is superimposed on the torque applied by the driver, and together drives the steering rack to move. The steering rack drives the first steering tie rod 6 and the second steering tie rod 8 to move, and then makes the wheels turn, realizing the vehicle steering operation. At this time, the servo motor 19 does not act and separates the output end of the servo motor 19 from the disconnecting rod 11 through the telescopic push rod 26. The sleeve gear 18 of the disconnecting rod 11 remains engaged with the toothed cylinder 23 on the steering rod 10, ensuring the integrity of the mechanical connection of the steering system.

[0032] Autopilot condition: After the vehicle switches to the autopilot mode, the vehicle control system sends an instruction to the servo motor 19. The servo motor 19 starts, and the worm on its output end meshes with the helical rack 17 on the outer surface of the disconnecting rod 11, driving the disconnecting rod 11 to slide upward in the sliding sleeve 16. The sleeve gear 18 at the lower end of the disconnecting rod 11 gradually disengages from the toothed cylinder 23, thus cutting off the mechanical connection between the steering wheel and the steering gear 1, avoiding the steering wheel hitting the driver during autopilot. At the same time, the vehicle autopilot system directly controls the power steering motor 3 to work, and accurately drives the steering rack of the steering gear 1 according to the preset path or sensor feedback information, realizing the autopilot steering of the vehicle.

[0033] Collision condition: At the moment of vehicle collision, the collision lever 22 moves along with the steering gear 1 and impacts with the wedge-shaped collision block 21 on the support 12. The impact force generated by the collision causes an upward force on the disconnecting lever 11, resulting in the connection failure or even deformation between the sleeve gear 18 and the gear cylinder 23. Even if the disconnecting lever 11 and the gear cylinder 23 have been disengaged in the autopilot mode at this time, the impact force generated by the collision will further ensure that the disconnecting lever 11 and the steering lever 10 no longer maintain a rigid connection state, changing the rigid connection structure with the steering column, thereby preventing the collision impact force from being directly transmitted to the driver through the steering system and effectively protecting the safety of the driver.

[0034] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art in the said technical field, various changes can be made without departing from the gist of the present invention.

Claims

1. A steering structure with an electric power steering gear, characterized in that, Including: Steering gear (1), on the outer surface of which a motor base (2) is fixedly connected. On the outer surface of the motor base (2), a power steering motor (3) is fixedly connected. On the outer surface of the steering gear (1), a gear-rack reversing seat (9) is fixedly connected. Inside the gear-rack reversing seat (9), a steering rod (10) is rotatably connected. On the upper surface of the steering rod (10), a toothed cylinder (23) is provided; Support (12), on the outer surface of which a chute (25) is fixedly connected. Inside the chute (25), a movable machine base (20) is slidably connected. On the outer surface of the movable machine base (20), a servo motor (19) is fixedly connected. On the outer surface of the support (12), an abutting seat (27) is fixedly connected. On the outer surface of the abutting seat (27), a telescopic ejector rod (26) is fixedly connected. The output end of the telescopic ejector rod (26) is fixedly connected to the movable machine base (20). On the outer surface of the support (12), a sliding sleeve (16) is fixedly connected. Inside the sliding sleeve (16), a disconnecting rod (11) is slidably connected. On the lower end surface of the disconnecting rod (11), a sleeve gear (18) is fixedly connected. The sleeve gear (18) is meshed with the toothed cylinder (23). On the outer surface of the gear-rack reversing seat (9), a collision hitting rod (22) is fixedly connected. On the outer surface of the support (12), a wedge-shaped collision block (21) is fixedly connected. On the outer surface of the disconnecting rod (11), an inclined rack (17) is provided. The output end of the servo motor (19) is meshed with the inclined rack (17) through a worm.

2. The steering structure with an electronic power steering gear according to claim 1, characterized in that, On the upper end surface of the disconnecting rod (11), a telescopic universal joint (13) is fixedly connected. One end of the telescopic universal joint (13) is fixedly connected to a steering link (14).

3. A steering structure with an electronic power steering gear according to claim 1, characterized in that, On the outer surface of the support (12), a connecting column (15) is fixedly connected. The support (12) is connected to the vehicle body through the connecting column (15).

4. A steering structure with an electric power steering gear according to claim 1, characterized in that At the front end of the sleeve gear (18), a guiding inclined surface (24) is provided.

5. A steering structure with an electric power steering gear according to claim 1, characterized in that, Inside the steering gear (1), a steering rack is provided. On the left side of the steering gear (1), a first steering tie rod (6) is movably connected. The first steering tie rod (6) is connected to the steering rack. The output end of the power steering motor (3) is connected to the steering rack. The steering rod (10) is connected to the steering rack.

6. A steering structure with an electronic power steering gear according to claim 5, characterized in that, On the right side of the steering gear (1), a second steering tie rod (8) is movably connected. The second steering tie rod (8) is connected to the steering rack.

7. A steering structure with an electric power steering gear according to claim 5, characterized in that, On the left side surface of the steering gear (1), a first shield (5) is fixedly connected. The first shield (5) is fixedly connected to the outer surface of the first steering tie rod (6).

8. A steering structure with an electric power steering gear according to claim 6, characterized in that, On the right side surface of the steering gear (1), a second shield (7) is fixedly connected. The second shield (7) is fixedly connected to the outer surface of the second steering tie rod (8).

9. A steering structure with an electric power steering gear according to claim 6, characterized in that, On the outer surface of the steering gear (1), a mounting bracket (4) is fixedly connected. The steering gear (1) is connected to the vehicle body through the mounting bracket (4).

10. A steering structure with an electric power steering gear according to claim 6, characterized in that, The upper surface of the collision hitting rod (22) is an inclined surface. The collision hitting rod (22) abuts against the wedge-shaped collision block (21).

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