Lengthened double-fork-arm mechanical structure for 135-degree steering of drive-by-wire cooperative intelligent automobile wheel

Abstract

The utility model discloses a drive-by-wire cooperative intelligent automobile wheel 135-degree (90-degree + 45-degree = 135-degree, the horizontal direction of an automobile body and tires and the horizontal wheel direction of a horizontal automobile are taken as original points, one side allows 90-degree steering of the automobile, and the other side allows 45-degree steering) steering lengthened double-fork-arm mechanical structure, which comprises an upper A-arm right-angle fork arm and a lower A-arm right-angle fork arm, an upper A arm corner fork arm and a lower A arm right-angle corner fork arm are vertically distributed, the same ends of the upper A arm corner fork arm and the lower A arm right-angle corner fork arm are rotationally connected with a C-shaped steering wheel frame, a transverse corner is arranged at the connecting end of the upper A arm corner fork arm and the steering wheel frame, and various steering degree parameters of a front wheel can be accurately positioned through the upper A arm corner fork arm and the lower A arm right-angle corner fork arm. When the front wheel turns, the upper A arm angle fork arm and the lower A arm right-angle angle fork arm can absorb transverse force borne by a tire at the same time, and due to the fact that the transverse rigidity of the upper A arm angle fork arm and the lower A arm right-angle angle fork arm is large, turning side inclination is small.

Description

Technical Field

[0001] The utility model relates to the technical fields of engines and electric vehicle steering, and particularly relates to a steer-by-wire collaborative intelligent vehicle wheel 135° steering extended double-wishbone mechanical structure. Background Technique

[0002] Nowadays, people's pursuit of vehicle space is getting higher and higher. Many people want to buy a vehicle with a super-large space to meet various travel needs. As the vehicle gets larger, the vehicle becomes longer and the wheelbase becomes longer, resulting in higher technical requirements for the turning radius and parking. To have a large space and be easy to operate, a steer-by-wire all-wheel steering system is needed. All-wheel steering is also known as four-wheel steering, which means that in addition to the traditional front wheels that can be steered, the rear wheels are also equipped with steering gears, which can be steered according to the situation. However, the steering angle of the rear axle is not as large as that of the front axle. With the continuous increase in the size of the vehicle, although the larger space brings more comfort, the steering and handling performance of the vehicle has fallen behind the pace of automotive technology development. Because as the wheelbase of the vehicle continues to increase, the turning radius will become larger and larger. A 5.2-meter vehicle requires a 12.5-meter turning space, greatly reducing its flexibility on curves, and parking will also become very inconvenient. In addition, new energy vehicles mainly based on electric vehicles have become the development direction of the automotive industry in China and the world. In recent years, with the development of electric drive technology and steer-by-wire technology, the steer-by-wire all-wheel steering digital synchronization and collaboration technology enables ordinary tire vehicles to achieve the steering function of tracked vehicles. All-wheel independent steering can achieve lateral movement, in-situ rotation, and walking at any angle. The four wheels can rotate in an independent and collaborative manner to achieve a zero turning radius or even diagonal movement, and the lateral movement, oblique movement (at a certain angle), in-situ rotation of the vehicle, and what kind of indication is needed according to the button command to indicate the running angle of the vehicle. Steer-by-wire technology cancels the mechanical hard connection between the steering wheel and the steering wheel, and completely realizes steering through wire harnesses, data transmission, motors, hydraulics, vacuum pump screws, etc., completely getting rid of the inherent limitations of the traditional steering system and improving the collision safety and driving convenience of the vehicle. Such vehicles with steer-by-wire independent steering devices can independently rotate each wheel to achieve reverse angle steering, crab walking, and lateral driving around a circle, greatly improving the mobility of the vehicle in a narrow space.

[0003] 1. When rotating in place around a circle, the front wheels are in an "eight" shape and the rear wheels are in an inverted "丷" shape, and the four wheels independently rotate around the center point of the vehicle in a 45° angle in place, etc.

[0004] 2. When the vehicle wheels and the vehicle body travel horizontally at 90°, the front two wheels independently rotate forward 90° in the horizontal direction, and the rear two wheels rotate backward 90°. The front and rear suspension directions are installed.

[0005] 3. When the vehicle is traveling at a low speed of 60 KM / H, the reverse angle of the rear two wheels.

[0006] 4. When the vehicle speed exceeds 60KM / H, the rear wheels turn in the same direction in the "crab walking" mode.

[0007] 5. When the vehicle is driving at high speed, the rear wheels turn inward 3 degrees to the left and right in an "eight" position to improve the stability and safety of high-speed driving.

[0008] 6. All-wheel wire-controlled intelligent active steering, can freely switch between four states below 40KM / H.

[0009] 7. The wire-controlled rear wheel reduces the turning radius of large-size vehicles, allowing a 6-meter-long vehicle to have a turning radius of a 4-meter-long vehicle. The front two wheels or the rear two wheels can independently run horizontally in a 90-degree "T" or "⊥" shape with the middle of the front wheels or the rear wheels as the center point around the circle. A non-load-bearing vehicle wheel 90 degrees + 90 degrees = 180 degrees (the body and tire are horizontal, double A wishbone suspension, and the horizontal vehicle tire is the origin: one side allows the vehicle to turn 90 degrees, and the other side allows 90 degrees.) Several state functions.

[0010] 8. A wire-controlled steering tie rod with a built-in spiral motor hydraulic rod margin for 45-degree and 90-degree steering extension states and normal driving steering tie rod conversion.

[0011] 9. Rear wheel (or front four wheels) hydraulic steering motor and azimuth angle meter.

[0012] The front and rear wheel frame shafts rotate 90 degrees on one side and 45 degrees on the other side around the shaft. The wheel frame shaft angle electric steering gear; the steering shaft obtained and rebated through the steering gear is connected to the wheel frame, the non-load-bearing drive axle shaft is connected to the non-load-bearing double cross arm of the drive and special off-road vehicles through the steering tie rod and shock absorber, and the rear drive axle shaft suspension is a non-load-bearing double cross arm suspension structure of the vehicle.

[0013] However, the following problems may occur when the existing vehicle steering device is used:

[0014] 1. Sedans, commercial vehicles, and SUVs are getting bigger and bigger, ranging from 5.2 meters to 6 meters. As a result, the longer the car and the longer the wheelbase, the larger the turning radius (12.5-16 meters) and the higher the parking space and driving skills required. The space required for turning and overtaking at high speeds is too great.

[0015] 2. The steering mechanism of today's cars, commercial vehicles and off-road vehicles cannot achieve soft or hard steering in place. The front and rear wheels of a single vehicle rotate at a 45° angle around the center of the vehicle.

[0016] 3. Currently, there is no domestic car, commercial vehicle, or off-road vehicle that can have four wheels in a "well" shape, with the front and rear wheels of the vehicle's maximum distance horizontally 90 degrees, and the front wheel axle of the vehicle traveling in a horizontal direction. Utility Model Content

[0017] The purpose of the utility model is to provide a wire-controlled cooperative intelligent automobile wheel 135° steering lengthened double wishbone mechanical structure, which solves the above-mentioned problems in the prior art.

[0018] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a wire-controlled coordinated intelligent automobile wheel 135° steering extended double fork arm mechanical structure, including an upper A-arm angle fork arm and a lower A-arm right-angle fork arm, the upper A-arm angle fork arm and the lower A-arm right-angle fork arm are distributed up and down, the same end of the upper A-arm angle fork arm and the lower A-arm right-angle fork arm is rotatably connected to a C-shaped steering wheel frame, the lower A-arm right-angle fork arm and the steering wheel frame are connected at a lateral corner, the upper A-arm angle fork arm and the steering wheel frame are connected at a lateral corner with a certain inclination angle, and the The steering wheel frame is rotatably connected to a wheel hub, one end of the steering wheel frame is fixed with a steering connecting arm, the steering connecting arm is rotatably connected to one end of a connecting piece, the other end of the connecting piece is rotatably connected to a steering tie rod, the wheel hub is fixedly connected to a transmission assembly, the upper end of the lower A-arm right-angle fork arm is fixed with a fixing seat, the transmission assembly passes through the fixing seat and is rotatably connected, a shock absorber is provided between the upper A-arm fork arm and the lower A-arm right-angle fork arm, the shock absorber is elastically connected to the upper A-arm fork arm, and an electronic angle meter is fixed to the upper end of the steering wheel frame.

[0019] Preferably, a through hole is provided in the center of the bogie wheel frame, and the transmission assembly passes through the through hole and is fixedly connected to the wheel hub.

[0020] Preferably, the transmission assembly includes a first transmission rod, one end of which is fixedly connected to the wheel hub, the other end of which is fixedly connected to one end of a first universal joint coupling, the other end of which is fixedly connected to one end of a second transmission rod, the second transmission rod passes through a fixed seat and is rotatably connected, and the other end of the second transmission rod is fixedly connected to a second universal joint coupling.

[0021] Preferably, the steering wheel frame, the steering connecting arm and the through hole are integrally formed by casting.

[0022] Preferably, the first universal joint coupling is located on the connecting line of the steering wheel frame and the rotation connection between the upper A-arm yoke and the lower A-arm right-angle yoke.

[0023] Preferably, the steering tie rod is equipped with a spiral motor hydraulic rod.

[0024] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0025] 1. By providing a lateral corner at the place where the right-angle fork arm of the lower A-arm is connected to the steering wheel frame, the single arm of the right-angle fork arm of the lower A-arm is extended to 90 degrees of the wheel (the length of the long arm is determined by the size of the wheel) without interfering with the long arm length of the tire, the right-angle fork arm of the lower A-arm is set to a right-angle shape instead of the traditional A-arm equilateral triangle, and a lateral corner is provided at the place where the upper A-arm fork arm is connected to the steering wheel frame, and the lateral corner is provided with a caster angle, and the single arm of the upper A-arm fork arm is extended longer (the length of the long arm is determined by the size of the wheel) and the wheel does not interfere with the long arm length of the tire at 90 degrees. Because it is located in the center of the tire, the long arm of the upper A-arm fork arm is longer, and the right-angle fork arm of the lower A-arm is set to a right-angle shape instead of the traditional A-arm equilateral triangle, so that the device has a larger rotation angle.

[0026] 2. The various steering parameters of the front wheels can be accurately positioned through the upper A-arm fork arm and the lower A-arm right-angle fork arm. When the front wheels turn, the upper A-arm fork arm and the lower A-arm right-angle fork arm can absorb the lateral force exerted on the tire at the same time. In addition, the lateral stiffness of the upper A-arm fork arm and the lower A-arm right-angle fork arm is large, so the roll during turning is small. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the wheel hub of the utility model rotating 90 degrees;

[0028] Figure 2 It is an overall schematic diagram of the bogie wheel frame of the utility model;

[0029] Figure 3 It is a schematic diagram of the in-situ rotation of the utility model;

[0030] Figure 4 This is a schematic diagram of the 45-degree movement in the same direction of the utility model;

[0031] Figure 5 This is a schematic diagram of the reverse 45-degree movement of the utility model;

[0032] Figure 6 This is a schematic diagram of the horizontal walking of the utility model;

[0033] Figure 7 It is a schematic diagram of the rear wheel of the present invention pointing 3 degrees inwards from left to right.

[0034] Explanations in the figure: 1. Upper A-arm angle fork arm; 2. Lower A-arm right-angle fork arm; 3. Steering wheel frame; 4. Wheel hub; 5. Connecting piece; 6. Steering tie rod; 7. Shock absorber; 8. Transmission assembly; 9. Electronic angle gauge; 201. Fixed seat; 301. Steering connecting arm; 302. Through hole; 801. First transmission rod; 802. First universal joint coupling; 803. Second transmission rod; 804. Second universal joint coupling. DETAILED DESCRIPTION

[0035] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0036] In the description of the present invention, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] See also Figure 1-Figure 7A wire-controlled coordinated intelligent automobile wheel 135° steering extended double wishbone mechanical structure, comprising an upper A-arm angle fork arm 1 and a lower A-arm right-angle fork arm 2, the upper A-arm angle fork arm 1 and the lower A-arm right-angle fork arm 2 are distributed up and down, the upper A-arm angle fork arm 1 and the lower A-arm right-angle fork arm 2 are connected to the frame, the lower A-arm right-angle fork arm 2 is connected to the steering wheel frame 3 and is provided with a lateral corner, the single arm of the lower A-arm right-angle fork arm 2 is extended to the wheel size to determine the long arm length, the wheel 90 degrees does not interfere with the tire long arm length, the lower A-arm right-angle fork arm 2 is set to a right angle shape instead of a traditional A-arm equilateral triangle, the upper A-arm angle fork arm 1 is connected to the steering wheel frame 3 and is provided with a lateral corner, the lateral corner is provided with a caster angle, the upper A-arm angle fork arm 1 Single arm extension is longer The wheel size determines the length of the long arm The wheel does not interfere with the tire long arm length at 90 degrees. Because it is in the center of the tire, the upper A-arm angle fork arm 1 has a longer long arm. The upper A-arm angle fork arm 1 is set to a right angle shape instead of a traditional A-arm equilateral triangle. The upper A-arm angle fork arm 1 and the lower A-arm right-angle fork arm 2 are rotatably connected to a C-shaped bogie wheel frame 3 at the same end. A through hole 302 is opened in the center of the bogie wheel frame 3. The transmission assembly 8 is fixedly connected to the wheel hub 4 through the through hole 302. The bogie wheel frame 3, the steering connecting arm 301 and the through hole 302 are integrally formed by casting. The shape of the bogie wheel frame 3 is C-shaped, so that the bogie wheel frame 3 has a strong bearing capacity, stable force, and a long service life. The vehicle Steering can be performed smoothly. The steering connecting arm 301 and the connecting piece 5 are arc-shaped. The steering connecting arm 301 and the connecting piece 5 are set to an arc shape to prevent collision with the transmission component 8 when the bogie wheel frame 3 is rotated and adjusted. At the same time, the rotation angle of the bogie wheel frame 3 can be made larger. The bogie wheel frame 3, the steering connecting arm 301 and the through hole 302 are manufactured by a casting process, so that they are integrally formed, ensuring that the bogie wheel frame 3, the steering connecting arm 301 and the through hole 302 are firmly connected. At the same time, the bogie wheel frame 3, the steering connecting arm 301 and the through hole 302 are cast and processed, thereby improving the efficiency of processing and producing the bogie wheel frame 3. The upper A-arm angle fork arm 1 is provided with a lateral corner at the connection end with the bogie wheel frame 3, and the lower A-arm right-angle fork The connecting end of the arm 2 and the steering wheel frame 3 is provided with a lateral corner with a certain inclination angle, the steering wheel frame 3 is rotatably connected with a wheel hub 4, a steering connecting arm 301 is fixed to the left end of the steering wheel frame 3, the steering connecting arm 301 is rotatably connected with one end of a connecting member 5, the other end of the connecting member 5 is rotatably connected with a steering tie rod 6, a spiral motor hydraulic rod is built into the steering tie rod 6, a spiral motor hydraulic rod margin is built into the steering tie rod 6, which is used for the conversion of the steering tie rod between 45 degree and 90 degree steering extension states and normal driving, a tooth is provided on the upper end of the steering tie rod 6, a telescopic threaded rod is built into the steering tie rod 6, and the steering tie rod 6 is driven to move by the meshing of the motor and the gear, the wheel hub 4 is fixedly connected with a transmission assembly 8,The upper end of the bogie wheel frame 3 is fixed with an electronic angle meter 9, which is used for obtaining the steering angle and feeding back the electronic steering angle meter. The upper end of the lower A-arm right-angle fork arm 2 is fixed with a fixing seat 201. By providing a corner on the lower A-arm right-angle fork arm 2 and the bogie wheel frame 3, and controlling the bogie wheel frame 3 to rotate by telescoping the steering tie rod 6, the angle of the wheel hub 4 is adjusted. The steering angle range of the wheel on the wheel hub 4 is 90+45=135 degrees. The wheel hub 4 has several states after adjusting the angle. State function: 1. Turn in a circle on the spot, the front wheel "eight" and the rear wheel "eight" inverted, the four wheels turn in a circle at a 45-degree angle 90, 180, 360, etc.; 2. The vehicle wheels and the body are horizontal and 90 degrees horizontally, the front two wheels independently move forward 90 degrees in the horizontal direction, and the rear two wheels move backward 90 degrees, and the front and rear suspension directions are installed; 3. The vehicle drives at a low speed for 60 hours per kilometer. The rear wheels of the vehicle turn in the same direction at high speed, and the crab walking mode; 5. The rear wheels of the vehicle drive at high speed. The "eight" state of 3 degrees inward from left to right improves the stability and safety of high-speed driving.

[0039] See also Figure 1 , Figure 2 and Figure 3, the transmission assembly 8 passes through the fixed seat 201 and is rotatably connected, a shock absorber 7 is provided between the upper A-arm angle fork arm 1 and the lower A-arm right-angle fork arm 2, and the shock absorber 7 is elastically connected to the upper A-arm angle fork arm 1, the transmission assembly 8 includes a first transmission rod 801, one end of the first transmission rod 801 is fixedly connected to the wheel hub 4, the other end of the first transmission rod 801 is fixedly connected to one end of a first universal joint coupling 802, the other end of the first universal joint coupling 802 is fixedly connected to one end of a second transmission rod 803, the second transmission rod 803 passes through the fixed seat 201 and is rotatably connected, the other end of the second transmission rod 803 is fixedly connected to a second universal joint coupling 804, the first universal joint coupling 802 is located on the connecting line of the rotational connection between the bogie wheel frame 3 and the upper A-arm angle fork arm 1 and the lower A-arm right-angle fork arm 2, one end of the transmission assembly 8 is fixedly connected to the wheel hub 4, the other end of the transmission assembly 8 One end is connected to the driving shaft or motor, the first transmission rod 801 and the second transmission rod 803 are connected through the first universal joint coupling 802, and the second transmission rod 803 is connected to the driving shaft or the motor through the second universal joint coupling 804, so that the vehicle can still be driven to move during the adjustment of the rotation angle of the wheel hub 4. The second transmission rod 803 passes through the fixed seat 201 and is rotatably connected, so as to limit the second universal joint coupling 804 and prevent the second universal joint coupling 804 from displacement. By arranging the first universal joint coupling 802 on the connecting line of the rotation connection between the bogie wheel frame 3 and the upper A-arm angle fork arm 1 and the lower A-arm right-angle fork arm 2, the bogie wheel frame 3 and the first transmission rod 801 can rotate around the same axis. When adjusting the steering angle of the wheel hub 4, the first transmission rod 801 rotates, and the position of the second universal joint coupling 804 will not be affected by the rotation of the wheel hub 4.

[0040] When the utility model is used:

[0041] First, the device is assembled to form a vehicle frame as a whole;

[0042] Then, the steering tie rod 6 is extended and retracted, and the extension and retraction of the steering tie rod 6 drives the connecting member 5 to move, and the connecting member 5 is rotatably connected with the steering connecting arm 301 to drive the steering wheel frame 3 to rotate, thereby adjusting the angle of the wheel hub 4. By extending and retracting the steering tie rod 6, the rotation angle of the wheel hub 4 can be 90+45=135 degrees or more, 90 degrees+45 degrees=135 degrees, the vehicle body and the tire are in the horizontal direction, and the horizontal vehicle wheel direction is the origin: one side allows the vehicle to turn 90 degrees, and the other side allows 45 degrees.

[0043] Next, the steering tie rod 6 corresponds to the steering wheel frame 3 independently one by one, and the motor drives the wheel hub 4 to rotate through the transmission assembly 8, so that each wheel can rotate and steer independently. At the same time, the wheel hub 4 adopts independent steering and rotates through the motor and the transmission assembly 8, which can realize the vehicle to turn around any point in space without sliding. Due to the different rotation angles of the wheel hub 4, the vehicle can realize a variety of unique movement modes, which greatly increases the operability and flexibility of the vehicle;

[0044] Finally, by controlling the steering tie rod 6 to extend and retract, the motor to work, and the transmission assembly 8 to transmit, the vehicle can travel or turn at multiple angles.

[0045] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A wire-controlled coordinated intelligent vehicle wheel 135° steering extended double wishbone mechanical structure, characterized by: The invention comprises an upper A-arm angle fork arm (1) and a lower A-arm right-angle fork arm (2), wherein the upper A-arm angle fork arm (1) and the lower A-arm right-angle fork arm (2) are distributed up and down, and the same end of the upper A-arm angle fork arm (1) and the lower A-arm right-angle fork arm (2) is rotatably connected to a C-shaped bogie wheel frame (3), a lateral corner is provided at the connection end of the lower A-arm right-angle fork arm (2) and the bogie wheel frame (3), a lateral corner with a certain inclination angle is provided at the connection end of the upper A-arm angle fork arm (1) and the bogie wheel frame (3), the bogie wheel frame (3) is rotatably connected to a wheel hub (4), and a steering connecting arm (301) is fixed at one end of the bogie wheel frame (3). ), the steering connecting arm (301) is rotatably connected to one end of a connecting member (5), the other end of the connecting member (5) is rotatably connected to a steering tie rod (6), the wheel hub (4) is fixedly connected to a transmission assembly (8), the upper end of the lower A-arm right-angle fork arm (2) is fixedly connected to a fixing seat (201), the transmission assembly (8) penetrates the fixing seat (201) and is rotatably connected, a shock absorber (7) is provided between the upper A-arm right-angle fork arm (1) and the lower A-arm right-angle fork arm (2), the shock absorber (7) is elastically connected to the upper A-arm right-angle fork arm (1), and the upper end of the steering wheel frame (3) is fixedly connected to an electronic angle gauge (9).

2. According to claim 1, a wire-controlled coordinated intelligent vehicle wheel 135° steering extended double wishbone mechanical structure is characterized by: A through hole (302) is provided in the center of the bogie wheel frame (3), and the transmission assembly (8) passes through the through hole (302) and is fixedly connected to the wheel hub (4).

3. The 135° steering extended double wishbone mechanical structure of a wire-controlled coordinated intelligent vehicle wheel according to claim 1, characterized in that: The transmission assembly (8) comprises a first transmission rod (801), one end of the first transmission rod (801) being fixedly connected to the wheel hub (4), the other end of the first transmission rod (801) being fixedly connected to one end of a first universal joint coupling (802), the other end of the first universal joint coupling (802) being fixedly connected to one end of a second transmission rod (803), the second transmission rod (803) passing through the fixed seat (201) and being rotatably connected, and the other end of the second transmission rod (803) being fixedly connected to a second universal joint coupling (804).

4. The 135° steering extended double wishbone mechanical structure of a wire-controlled coordinated intelligent vehicle wheel according to claim 1, characterized in that: The steering wheel frame (3), the steering connecting arm (301) and the through hole (302) are integrally formed by casting.

5. The 135° steering extended double wishbone mechanical structure of a wire-controlled coordinated intelligent vehicle wheel according to claim 3, characterized in that: The first universal joint coupling (802) is located on a line connecting the steering wheel frame (3) and the rotational connection between the upper A-arm angle fork arm (1) and the lower A-arm right-angle fork arm (2).

6. The 135° steering extended double wishbone mechanical structure of a wire-controlled coordinated intelligent vehicle wheel according to claim 1, characterized in that: The steering tie rod (6) is provided with a spiral motor hydraulic rod built into it.

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