An electric vehicle steering assembly

Abstract

The application discloses an electric vehicle steering assembly and belongs to the technical field of steering control devices. The electric vehicle steering assembly comprises a vehicle body, a load-bearing beam is arranged at the end of the vehicle body, a handlebar is arranged above the load-bearing beam, the handlebar comprises a folding rod provided with a steering column at the bottom end, and a handle is arranged horizontally at the top end of the folding rod. Through the design of the vehicle body, the suspension, the connecting piece and the steering knuckle, the steering wheel is stretched out away from the vehicle body and the driver by the supporting arm in the direction of vehicle travel, so that the steering wheel is away from the gravity center of the vehicle, the offset amplitude of the gravity center of the vehicle is reduced during steering, and the body shaking caused by the lateral force is reduced. Meanwhile, the front wheel is designed to be stretched forward, so that the approach angle of the vehicle is increased, the passability and the terrain adaptability are enhanced, a larger buffer zone can be formed at the front of the vehicle, and the driving safety is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of steering control devices, and particularly relates to an electric vehicle steering assembly. BACKGROUND

[0002] The sightseeing vehicle is a special vehicle designed for tourist attractions, parks, large amusement parks, closed communities, campuses and other areas, and can be divided into beach vehicles, golf vehicles, scenic area shuttle vehicles and the like according to actual uses. With the process of electrification, the current sightseeing vehicles mostly adopt new energy power, and noise control, power output and the like are greatly improved.

[0003] The existing Chinese utility model patent with the publication number CN206549103U discloses a golf vehicle, the front frame includes a vehicle head and a steering rod, the vehicle head is fixedly connected with the telescopic device, the steering rod is rotationally arranged on the vehicle head, the buffer member is arranged, so that the steering rod can be positioned in any direction by relying on the friction force provided by the buffer member, and the structure of the golf vehicle is simplified, but because the front wheel and the handlebar are too close to the driver, the center of gravity of the vehicle is very close to the front wheel, and the steering structure provided with the buffer member needs greater force to control the direction, and when the steering is greatly turned, the center of gravity is easily deviated due to the large force operation, causing the vehicle to be seriously tilted or even overturned, and in view of this, the electric vehicle steering assembly is provided. SUMMARY

[0004] The technical problem to be solved by the application is to overcome the defects of the prior art, and to provide an electric vehicle steering assembly.

[0005] The technical scheme adopted to solve the above technical problem is:

[0006] An electric vehicle steering assembly, comprising:

[0007] A vehicle body, a load-bearing beam is mounted at the end of the vehicle body, a handlebar is mounted above the load-bearing beam, the handlebar comprises a folding rod provided with a steering column at the bottom end, and a grip is arranged horizontally at the top end of the folding rod;

[0008] A suspension, the suspension comprises a rotating shaft, the rotating shaft is parallel to the grip and is mounted at the bottom of the load-bearing beam, one support arm is rotationally mounted at each end of the rotating shaft, the free ends of the two support arms extend horizontally away from the vehicle body and are detachably provided with joints, and a shock absorber is arranged vertically between the middle portions of the two support arms and the load-bearing beam;

[0009] The connecting piece comprises two rocker arms, each of which is integrally formed by a middle hole disc, a short supporting rod and a long supporting rod, the middle hole disc is rotationally connected with the bearing beam through a vertical shaft, the short supporting rod is synchronously twisted with the steering column through a torsion piece, and the free end of the long supporting rod is provided with a second pull rod.

[0010] The knuckle comprises a knuckle disc, which is horizontally swingably connected with the joint, and a knuckle arm is installed on the top of the knuckle disc and parallel to the rotation shaft, and the knuckle arm is assembled with the second pull rod.

[0011] Further, the torsion piece comprises two pin rods, which are fixed in threaded holes at the bottom edge of the steering column through threaded rods, the line connecting the centers of the two threaded holes passes through the center of the steering column and is parallel to the axis of the rotation shaft, the lower ends of the two pin rods are respectively assembled with the short supporting rods on the same side through the first pull rods, the distance between the pin rods and the rotation center of the steering column is equal to the length of the short supporting rod, and the middle line of the short supporting rod is parallel to the axis of the rotation shaft.

[0012] Through the above technical scheme, a specific configuration of the torsion piece is disclosed, two pin rods synchronously rotate with the steering column, during steering, one of the two pin rods approaches the vehicle body and the other synchronously moves away from the vehicle body, the distance between the two pin rods and the center of the steering column is much smaller than the distance between the end of the handle and the center of the steering column, which can greatly increase the torsional moment, and the pin rods are fixedly installed on the steering column, which can ensure that the rotation angle of the pin rods is consistent with the rotation angle of the handle, and the first pull rods pull the short supporting rods, so that the two rocker arms rotate to the same angle, the distance between the pin rods and the rotation center of the steering column is equal to the length of the short supporting rod, the middle is connected through the hard first pull rod, that is, the rotation path of the pin rods and the rotation path of the free end of the short supporting rod are completely the same, and the rotation angle of the short supporting rod is equal to the rotation angle of the pin rods, and the rotation is transmitted to the knuckle position through the rocker arms, so that the precise steering action is completed.

[0013] Further, the first pull rod comprises an adjusting part, the two ends of the adjusting part are respectively provided with hinged parts, the lower end of the pin rod is provided with a spherical head, the free end of the short supporting rod is provided with a vertical rod, the top surface of the vertical rod is provided with a vertical rod head, the vertical rod head is arranged at the same height with the spherical head, and the two hinged parts are respectively assembled with the spherical head and the vertical rod head.

[0014] By the above technical scheme, in order to further improve the steering precision, the vertical rod is installed at the free end of the short lever, so that the first pull rod is in a horizontal state after installation, and when the direction is in the middle, the first pull rod is in a horizontal position perpendicular to the axis of the steering shaft, at this time, the pin rod rotates with the steering column, and only the first pull rod moves horizontally, and does not occur radial torsion due to the height difference between the two ends, so that the position of the pin rod is accurately converted into the position of the vertical rod, and the pin rod and the vertical rod are not linearly moved but circularly moved, so that the pin rod and the vertical rod are rotatably connected through the hinge part, and smooth rotation of the pin rod and the vertical rod is ensured.

[0015] Further, the torsion member includes a relay frame, the relay frame includes a middle seat provided with a cross pin at the top end, the middle seat is installed at the bottom end of the steering column through the cross pin, a rotating plate is installed at the bottom end of the middle seat, a sliding port is provided above the free end of the short lever, a roller set is installed in the sliding port, and the roller set is installed at the free end of the short lever.

[0016] Through the above technical scheme, a specific configuration of the torsion member is disclosed, the middle seat of the relay frame is coaxial with the steering column, at this time, it needs to be noted that the steering column needs to be ensured to be vertical and located at the midpoint of the connecting line of the rotation centers of the two rocker arms, the distance from the sliding port to the center of the steering column is much smaller than the distance from the end of the handle to the center of the steering column during steering, the torsional moment can be greatly improved, the rotating plate rotates synchronously with the handle, and the sliding port vertically extrudes the roller set, so that the short lever can be pushed to rotate around the vertical shaft, as the rotation angle increases, the free end of the short lever gradually moves away from the steering column, and the steering resistance also gradually increases, so that the precise steering action is completed, and the stability of large steering is ensured.

[0017] Further, the roller set includes a tapered roller and a straight roller, the straight roller is installed at the inner lower part of the sliding port, a straight chamfer surface is arranged on the sliding port, and the tapered roller is installed at the straight chamfer surface of the sliding port.

[0018] Through the above technical scheme, the straight roller is in rolling contact, which can prevent the sliding port from being worn to cause steering vacancy, further ensure the steering precision, and the tapered roller can play a limiting role to prevent torsion caused by unilateral force of the rocker arm, and ensure stable work of the structure for a long time.

[0019] Further, the arm includes a straight plate, bolt seats and bearing seats are arranged at both ends of the straight plate respectively, the bearing seat is connected with the rotating shaft through a bearing, the bolt seat is detachably connected with the joint through a bolt, a protruding seat is arranged in the middle of the straight plate, and the shock absorber is installed at the protruding seat position.

[0020] Through the technical scheme, the convex seat can thicken the straight plate to ensure stable stress, and the shock absorber is installed at the position of the convex seat, so that a bolt hole does not need to be formed in the straight plate, and the connection position of the straight plate and the shock absorber is targeted in structure strength.

[0021] Further, the bearing beam comprises a main frame, a shock absorber seat is installed on the side of the main frame away from the vehicle body, the top end of the shock absorber is installed at the position of the shock absorber seat, a sub-frame is connected between the shock absorber seat and the main frame, and a crashproof cover is installed on the sub-frame corresponding to the position of the shock absorber seat.

[0022] Through the technical scheme, for the installation of the shock absorber, the sub-frame is installed at the end of the main frame of the bearing beam, and a shock absorber seat can be installed, the shock absorber seat is connected with the top ends of two shock absorbers, the shock absorber seat can be replaced alone, the maintenance of the bearing beam is convenient, and in addition, the top of the sub-frame is designed to be open, so that the shock absorber seat is installed on the bearing beam from top to bottom, and the shock absorber is conveniently assembled and connected with the shock absorber below.

[0023] Further, blind holes are formed at the positions of the convex seats, the blind holes are three, one of the blind holes is close to the bolt seat and located on the line connecting the center of the bolt seat and the center of the bearing seat, and the other two blind holes are close to the bearing seat and symmetrically arranged on the two sides of the line connecting the center of the bolt seat and the center of the bearing seat, and the shock absorber is installed at the position of the convex seat in an inclined manner through cooperation of the bolt and the blind hole.

[0024] Through the technical scheme, the blind holes can be installed with bolts for the installation of the bottom end of the shock absorber, the blind hole close to the bearing seat is lower than the blind hole close to the bolt seat, so that the top end of the shock absorber is inclined to the vehicle body, when the support arm swings around the rotation shaft, the stress direction of the shock absorber is basically coincident with the axis of the shock absorber, so that the shock absorber is prevented from being damaged due to radial stress during deep shock absorption, and in addition, the straight plate, the bolt seat, the blind hole and the bearing seat adopt an axial symmetry structure, so that the left and right support arms do not need to be distinguished during production, and the manufacturing equipment and manufacturing process can be simplified.

[0025] Further, the second pull rod comprises an intermediate rod, end heads are rotatably installed at both ends of the intermediate rod through threads, a ball head rod is installed in the end head, a vertical hole sleeve is installed at the free end of the long branch rod and is assembled with the ball head rod, and the steering knuckle is assembled with the end head on the same side through the ball head rod.

[0026] Through the technical scheme, in order to avoid that the large swing of the support arm affects the static centering of the steering structure, the second pull rod is connected with the steering knuckle and the free end of the long branch rod through the ball head rod, so that the second pull rod can be twisted in the radial direction as a whole, and the stress bending of the relatively long second pull rod is avoided, and in addition, the length-adjustable structure of the second pull rod can adjust the distance between the steering knuckle and the long branch rod, and adapt to the direction deviation caused by the small deformation of the second pull rod.

[0027] Further, the joint comprises a fixed head, the fixed head is detachably connected with the free end of the supporting arm, the fixed head is provided with a rotating head away from one end of the supporting arm, the top ends of the two rotating heads are inclined to each other and close to each other, the rotating head is provided with a penetrating shaft in the middle, the top end of the penetrating shaft is inclined to the side away from the vehicle body, and the rotating head is assembled and connected with the steering knuckle through the penetrating shaft.

[0028] Through the above technical scheme, in order to ensure the dynamic centering of the steering structure, when advancing, the inward inclination of the rotating head makes the steering wheel synchronously inwardly inclined, and the backward inclination of the penetrating shaft makes the steering wheel synchronously backwardly inclined, when advancing and steering, the resistance is larger, the external force required for large steering is larger, the large steering is more stable, and after the steering is completed, the steering wheel can be automatically returned to the normal position, so that the driver does not need to always apply an external force to the handlebar to keep straight, the advancing is stable, and the driving difficulty is reduced.

[0029] The beneficial effects of the present application are as follows:

[0030] (1) Through the design of the vehicle body, the suspension, the connecting piece and the steering knuckle, the steering wheel is stretched out by the supporting arm away from the vehicle body and the driver, so that the steering wheel is away from the vehicle gravity center, the steering vehicle gravity center offset amplitude is reduced, the body shaking caused by lateral force is reduced, the front wheel front extension design increases the approach angle of the vehicle, the passability and terrain adaptability are enhanced, a larger buffer area can be formed in the front of the vehicle, and the driving safety is increased;

[0031] (2) Through the setting of the suspension, the impact energy of the road is transmitted to the supporting arm through the steering wheel, and the shock absorber converts the impact into heat energy by providing resistance, the shock absorber is installed in the middle segment of the supporting arm, so that the shock absorber can quickly suppress the upward movement of the tire, thereby absorbing more impact energy, the large stroke of the steering wheel allows the vehicle to pass over larger obstacles, and the small stroke of the shock absorber means that the shock absorber itself does not need to be designed to be too long or too rigid, and the movement of the wheel can be more accurately and effectively controlled within the effective working range of the shock absorber;

[0032] (3) The setting of the connecting piece can more accurately transmit the rotation angle of the handle position to the rocker position through the torsion piece, and can also greatly reduce the required torque for steering, adapt to high-speed and obstacle crossing scenes, and at the same time, the rocker and the steering knuckle arm are parallel, and the second pull rod perpendicular to the rocker and the steering knuckle arm directly transmits the torque, so that the steering wheel can smoothly complete the steering action, and the steering accuracy is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 is a schematic diagram of the overall structure of the present application;

[0034] Figure 2 is an assembly schematic diagram of the local structure of the present application;

[0035] Figure 3 is a schematic diagram of the local structure between the load-bearing beam, suspension and connecting piece of the present application;

[0036] Figure 4 is a schematic diagram of the structure between the load-bearing beam, suspension and knuckle of the present application;

[0037] Figure 5 is a schematic diagram of the position between the arm, joint and knuckle of the present application;

[0038] Figure 6 is a schematic diagram of the assembly between the steering column, pin rod, first pull rod, rocker, second pull rod and knuckle of the present application;

[0039] Figure 7 is a schematic diagram of the disassembly between the steering column, pin rod, first pull rod and rocker of the present application;

[0040] Figure 8 is a schematic diagram of the position between the shock absorber and arm of the present application;

[0041] Figure 9 is a schematic diagram of the assembly between the steering column, relay bracket, rocker, second pull rod and knuckle of the present application;

[0042] Figure 10 is a schematic diagram of the disassembly between the steering column, relay bracket, rocker and load-bearing beam of the present application.

[0043] Reference signs: 1, vehicle body; 11, shaft sleeve; 2, handlebar; 21, folding rod; 22, grip; 23, steering column; 231, threaded hole; 3, suspension; 31, rotating shaft; 32, arm; 321, straight plate; 322, bolt seat; 323, protruding seat; 324, bearing seat; 325, blind hole; 33, shock absorber; 34, joint; 341, fixed head; 342, rotating head; 343, through shaft; 4, connecting piece; 41, pin rod; 411, spherical head; 412, threaded rod; 42, first pull rod; 421, adjusting part; 422, hinged part; 43, rocker; 431, middle hole disc; 432, short supporting rod; 433, vertical rod; 434, vertical rod head; 435, vertical shaft; 436, long supporting rod; 437, vertical hole sleeve; 44, second pull rod; 441, middle rod; 442, end head; 443, ball head rod; 45, relay bracket; 451, rotating plate; 452, middle seat; 453, cross pin; 454, sliding opening; 455, straight chamfer surface; 46, roller set; 461, conical roller; 462, straight roller; 5, steering wheel; 6, load-bearing beam; 61, main bracket; 62, shock absorber seat; 63, auxiliary bracket; 65, avoiding opening; 7, anti-collision cover; 8, knuckle; 81, knuckle disc; 82, knuckle arm; 83, knuckle bearing. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical scheme and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not to limit the present application.

[0045] As shown in Figures 1-10 , the present embodiment provides an electric vehicle steering assembly. The existing sightseeing vehicle steering structure and the close center of gravity of the vehicle body cause the vehicle to easily tilt during intense driving. The large virtual position of the steering causes low steering precision, which makes it difficult to control the vehicle. The present embodiment provides a specific configuration to solve the existing problems:

[0046] Regarding the vehicle body 1, a mounting space is provided for the vehicle battery, the electronic control system, the rear wheels and the driver's seat. The motor is built into the rear wheels to provide power for the vehicle. Referring to Figure 1 and Figure 2 , the load-bearing beam 6 is mounted at the end of the vehicle body 1. The load-bearing beam 6 and the vehicle body 1 are fixedly connected to form a whole. The shaft sleeve 11 is mounted above the load-bearing beam 6. The handlebar 2 is mounted in the shaft sleeve 11 through a bearing. The handlebar 2 is arranged at one end of the vehicle body 1 and is used by the driver to change the direction of travel. In addition, the handlebar 2 includes a folding rod 21 provided with a steering column 23 at the bottom end. The folding rod 21 can be folded to reduce the space occupied by the vehicle and facilitate transportation and storage. A horizontal handle 22 is provided at the top end of the folding rod 21. Rotating the horizontal handle 22 can drive the steering column 23 to rotate around the axis to provide the required rotation torque for reversing;

[0047] Regarding the suspension 3, referring to Figure 1 and Figure 3 , the suspension 3 includes a rotating shaft 31. The rotating shaft 31 is a light shaft. The rotating shaft 31 is installed at the bottom of the load-bearing beam 6 in parallel with the handle 22 of the vehicle. The rotating shaft 31 has one support arm 32 rotatably installed at each end. The free ends of the two support arms 32 extend horizontally away from the vehicle body 1 and are detachably provided with a joint 34. The joint 34 is used to mount a steering knuckle 8. The steering knuckle 8 includes a steering knuckle disc 81. The steering knuckle disc 81 is connected through a steering knuckle bearing 83 and a steering wheel 5. The steering wheel 5 is built-in motor and can be connected with the battery and the electronic control system on the vehicle body 1 for four-wheel drive. The steering wheel 5 extends in the direction of vehicle travel away from the driver and the vehicle body 1, i.e. away from the center of gravity of the vehicle body. The two support arms 32 are connected between the middle part and the load-bearing beam 6 by a vertically arranged shock absorber 33. In the bumpy section, the support arm 32 can swing to compress the shock absorber 33 to buffer the impact;

[0048] Regarding the connecting piece 4, referring to Figure 6The connecting piece 4 comprises two rocker arms 43 arranged horizontally and parallel to the rotating shaft 31, and each of the rocker arms 43 is integrally formed by a middle hole disc 431, a short supporting rod 432 and a long supporting rod 436, which are made of an integrated cast iron or alloy cast piece, and have higher structural strength. The middle hole disc 431 is rotationally connected to the bearing beam 6 through a vertical shaft 435, so that the rocker arm 43 is rotationally mounted on the bearing beam 6. The short supporting rod 432 is connected to the steering column 23 through a torsion piece to be synchronously twisted. The free end of the long supporting rod 436 is provided with a second pull rod 44, and a knuckle disc 81 is horizontally swingably connected to the joint 34. The knuckle disc 81 is provided at the top with a knuckle arm 82 parallel to the rotating shaft 31. The knuckle arm 82 is assembled to the second pull rod 44. When the rotating handle 22 is rotated, the rocker arm 43 is synchronously rotated through the torsion piece. The rocker arm 43 is rotated to synchronously swing the knuckle arm 82 through the second pull rod 44, so that the knuckle disc 81 swings horizontally around the joint 34, and the steering wheel 5 is rotated to complete the steering action.

[0049] The working principle of the embodiment is as follows:

[0050] When the vehicle is running straight, the horizontal extension of the supporting arm 32 is provided with a shock absorber 33 mounted at the middle section of the supporting arm 32. When the steering wheel 5 at the end of the supporting arm 32 just encounters an impact, the shock absorber 33 can immediately feel a greater force than the actual force of the tire due to the force amplification of the lever. This makes the shock absorber 33 start working faster and more effectively, and quickly suppresses the upward movement of the steering wheel 5. During the impact process, the shock absorber 33 needs to overcome a greater force to control the movement of the supporting arm 32, which means that it can absorb and dissipate more impact energy, and convert the bumping into internal energy loss (mainly heat energy) of the shock absorber 33. The exposed arrangement of the shock absorber 33 can quickly dissipate the heat through air cooling, which does not affect the normal work. The large stroke of the steering wheel 5 allows the vehicle to pass over larger obstacles, and the small stroke of the shock absorber 33 means that the shock absorber 33 itself does not need to be designed too long or too rigid, and can more accurately and effectively control the movement of the wheel within its effective working range. This design enables the device to more quickly and completely process the impact from the road, reduces the degree of transmission of the impact to the vehicle body 1, thereby significantly improving the riding stability of the vehicle, reducing the bumping feeling, and improving the riding comfort;

[0051] When the steering wheel 5 is away from the center of gravity of the vehicle, the load distribution of the front axle is more reasonable, the center of gravity of the vehicle is less likely to deviate during steering, and the risk of rollover is effectively reduced. At the same time, the design of the forward extension of the steering wheel 5 forms a larger buffer zone at the front of the vehicle. When a frontal collision occurs, the steering wheel 5 and the upwardly swinging support arm 32 can absorb part of the impact energy, reducing the impact force directly borne by the driver and reducing the risk of injury. For example, in an experiment, when the vehicle collides with an obstacle at a speed of 30 km / h, the forward extension design of the steering wheel 5 can absorb more impact energy than the design in which the steering wheel 5 is flush with the front of the vehicle body 1, reducing the peak acceleration of the driver's chest and head, and the raised free end of the support arm 32 can block the obstacle and the driver, reducing the risk of injury.

[0052] The forward extension design of the steering wheel 5 overcomes the disadvantage of the driver being too far forward in the sightseeing vehicle, and makes the center of gravity of the vehicle closer to the front and rear axles. In experiments, the vehicle is less likely to roll over on a wet road or during sharp turns, because when the front wheels are away from the center of gravity, the grip distribution of the front wheels is more uniform on bumpy roads or during high-speed cornering, reducing the risk of side slipping or losing control due to the deviation of the center of gravity.

[0053] The forward extension design of the steering wheel 5 increases the approach angle of the vehicle from the traditional design of 30° to 40°-45°. The design of the support arm 32 allows the up and down swinging stroke of the steering wheel 5 to be extended from the traditional design of 150 mm to 200-250 mm, while the stroke of the shock absorber 33 remains unchanged. This allows the vehicle to easily overcome obstacles with a height of 30-40 cm (such as rocks or tree roots). When the vehicle passes through a bumpy road, the contact time of the front wheels with the ground increases by about 30%, reducing the risk of skidding and losing control.

[0054] During steering, the forward extension design of the front wheels increases the steering arm (the horizontal distance between the front wheels and the driver), allowing the driver to achieve a larger front wheel deflection angle with less steering force. This is particularly true at high speeds or in complex terrain, where steering is more sensitive and accurate. Furthermore, the torsion member is arranged to, when the handle 22 is rotated to a length, cause the short lever 432, which is much shorter than the handle 22, to rotate synchronously with the steering column 23, thereby assisting in steering. In addition, the long lever 436 and the steering knuckle arm 82 are parallel to each other and connected by the hard second pull rod 44. The torsion of the long lever 436 can be completely converted into the torsion of the steering knuckle arm 82, achieving precise steering control.

[0055] In further embodiments, a specific configuration of a torsion member is disclosed, with reference to Figure 6, the torsion member comprises two pin rods 41 fixed in threaded holes 231 at the bottom edge of the steering column 23 through threaded rods 412, as the pin rods 41 need to bear large radial force when steering, and are vulnerable parts, they are designed to be detachable, so that the pin rods 41 can be replaced individually, and the subsequent maintenance is facilitated, the center line of the two threaded holes 231 passes through the center of the steering column 23 and is parallel to the axis of the rotating shaft 31, that is, the two pin rods 41 are installed at the position of the steering column 23 closest to the two rocker arms 43, when the handle 22 is horizontally centered, the two pin rods 41 are also horizontally centered, so that the two rocker arms 43 stay at a position parallel to the axis of the rotating shaft 31, the distance between the two pin rods 41 and the center of the steering column 23 is much smaller than the distance between the end of the handle 22 and the center of the steering column 23, which can greatly increase the torsional moment, wherein the lower ends of the two pin rods 41 are respectively connected with the same side short link rods 432 through the first pull rods 42, the two pin rods 41 rotate synchronously with the steering column 23, when steering, one of the two pin rods 41 is close to the vehicle body 1 and the other is away from the vehicle body 1 synchronously, and both are fixedly installed on the steering column 23, which can ensure that the rotation angle of the pin rod 41 is consistent with the rotation angle of the handle 22, and through the first pull rod 42 pulling the short link rod 432, the two rocker arms 43 are pulled to the same angle of rotation, the distance between the pin rod 41 and the rotation center of the steering column 23 is equal to the length of the short link rod 432, and they are connected through the hard first pull rod 42, that is, the rotation path of the pin rod 41 and the rotation path of the free end of the short link rod 432 are exactly the same, and the rotation angle of the short link rod 432 is equal to the rotation angle of the pin rod 41, which ensures efficient transmission of the steering angle while increasing the moment, and then the rotation is transmitted to the steering knuckle 8 through the rocker arm 43, and the precise steering action is completed.

[0056] In further embodiments, to further improve the steering accuracy, with reference to Figure 7The free end of the short supporting rod 432 is provided with a vertical rod 433, the top surface of the vertical rod 433 is provided with a vertical rod head 434, the vertical rod head 434 is arranged at the same height with the spherical head 411, the two hinge parts 422 are respectively assembled with the spherical head 411 and the vertical rod head 434, the vertical rod 433 is installed at the free end of the short supporting rod 432, so that the first pull rod 42 is installed in a horizontal state, it is to be noted that the avoiding opening 65 is arranged on the top surface of the bearing beam 6, so that the vertical rod 433 can rotate around the shaft freely, when the direction is in the middle, the first pull rod 42 is in a horizontal position perpendicular to the axis of the rotating shaft 31, at this time, the pin rod 41 rotates with the steering column 23, only the first pull rod 42 moves horizontally, and will not be twisted up and down due to the height difference between the two ends, the displacement of the pin rod 41 is accurately converted into the displacement of the vertical rod 433, and the pin rod 41 and the vertical rod 433 are not linearly moved but circularly moved, therefore, the first pull rod 42 comprises the adjusting part 421, the two ends of the adjusting part 421 are respectively provided with the hinge parts 422, the lower end of the pin rod 41 is provided with the spherical head 411, the spherical head 411 and the vertical rod head 434 are respectively connected in rotation through the hinge parts 422, so that the first pull rod 42 can be twisted horizontally.

[0057] In further embodiments, a specific configuration of the torsion member is disclosed, with reference to Figure 9, the torsion member includes a relay frame 45, the relay frame 45 includes a middle base 452 provided with a cross pin 453 at the top end, the middle base 452 is embedded and installed at the bottom end of the steering column 23 through the cross pin 453, the middle base 452 of the relay frame 45 is coaxial with the steering column 23, at this time, it needs to be noted that the steering column 23 needs to be guaranteed vertical and at the midpoint position of the connecting line of the rotation centers of the two rocker arms 43, this coaxial and central installation mode can greatly increase the diameter of the middle base 452, significantly improve the ability to withstand radial force, and improve the phenomenon that the torsion member is easy to be damaged, when steering, the distance from the sliding port 454 to the center of the steering column 23 is much smaller than the distance from the end of the handle 22 to the center of the steering column 23, which can greatly improve the torsion moment, the bottom end of the middle base 452 is provided with a rotating plate 451, the sliding port 454 is provided above the free end of the short branch rod 432 corresponding to the rotating plate 451, the roller set 46 is installed in the sliding port 454, and the roller set 46 is installed at the free end of the short branch rod 432, wherein the integrated structure of the rotating plate 451 has stronger stability in fixed assembly for long-term use, at the same time, the number of parts is reduced, which is convenient for early production and manufacturing and later maintenance and disassembly, the rotating plate 451 rotates synchronously with the handlebar 2, and when the direction is in the middle, the roller set 46 is closest to the center of the steering shaft 23, as the steering proceeds, the sliding port 454 vertically extrudes the roller set 46, which can push the short branch rod 432 to rotate around the vertical shaft 435, as the rotation angle increases, the short branch rod 432 rotates around the vertical shaft 435, and the roller set 46 gradually moves away from the steering column 23, the lengthening of the resistance arm (the distance between the roller set 46 and the rotation center of the steering column 23) gradually increases the resistance to the forward movement of the roller set 46, which reminds the driver from the body sense that the steering angle is gradually increasing, which is convenient for the driver to understand the vehicle state, so as to stably drive and complete the precise steering action, at the same time, the force required by the driver to greatly steer is larger, which makes the driver more cautious to greatly steer, avoiding excessive steering caused by too consistent steering resistance.

[0058] In further embodiments, referring to Figure 10 , the roller set 46 includes a conical roller 461 and a straight roller 462, the straight roller 462 is installed at the inner lower part of the sliding port 454, the straight roller 462 performs rolling contact, which can prevent the steering from being disabled due to wear of the sliding port 454, the sliding port 454 is provided with a straight chamfer surface 455 at the upper position, the conical roller 461 is installed at the straight chamfer surface 455 of the sliding port 454, the conical roller 461 can play a limiting role, when the rotating plate 451 rotates, the conical roller 461 can extrude the circumferential side wall to keep the straight roller 462 vertical, thereby preventing the torsion and bending of the vertical shaft 435 caused by unilateral force of the rocker arm 43, and ensuring the stable work of the rocker arm 43 for a long time.

[0059] In further embodiments, a specific configuration of the support arm 32 is disclosed, referring to Figure 4 andFigure 5 The support arm 32 comprises a straight plate 321, bolt seats 322 and bearing seats 324 are arranged at both ends of the straight plate 321 respectively, the straight plate 321, the bolt seats 322 and the bearing seats 324 are integrally casted and formed, hollowed support ribs are arranged along the long edges, the structure has high strength, the bearing seats 324 are assembled and connected with the rotating shaft 31 through bearings, providing a rotating fulcrum for the swing of the support arm 32, the bolt seats 322 are detachably connected with the joint 34 through bolts, four bolt holes are arranged, multi-point connection can be realized, the installation strength of the joint 34 is improved, the middle part of the straight plate 321 is provided with a raised seat 323, the bottom end of the shock absorber 33 is installed at the position of the raised seat 323, the raised seat 323 can thicken the straight plate 321, ensuring stable stress, and the shock absorber 33 is installed at the position of the raised seat 323, bolt holes do not need to be arranged at the middle part of the straight plate 321, not only the middle part strength of the straight plate 321 is not reduced, but also the connection position of the straight plate 321 and the shock absorber 33 can be specifically structurally reinforced.

[0060] In further embodiments, for the installation of the shock absorber 33, referring to Figure 4 and Figure 8 The carrying beam 6 comprises a main frame 61, the shock absorber seats 62 are installed on the side of the main frame 61 away from the vehicle body 1, the auxiliary frames 63 are installed at the end parts of the main frame 61 of the carrying beam 6, the main frame 61 cooperates with the auxiliary frames 63 to fix the shock absorber seats 62 from both sides, the shock absorber seats 62 are connected with the top ends of the two shock absorbers 33 through bolts, the shock absorber seats 62 can be replaced independently relative to the carrying beam 6, ensuring convenient maintenance of the carrying beam 6, the top ends of the shock absorbers 33 are installed at the positions of the shock absorber seats 62, the auxiliary frames 63 are connected between the shock absorber seats 62 and the main frame 61, and the top parts of the auxiliary frames 63 are designed to be open, facilitating the shock absorber seats 62 to be installed on the carrying beam 6 from top to bottom and facilitating the assembly and connection with the shock absorbers 33 below, the anti-collision covers 7 are installed at the positions of the shock absorber seats 62 corresponding to the auxiliary frames 63, avoiding the obstacles between the two wheels to directly collide with the auxiliary frames 63 and the shock absorber seats 62, ensuring the stable installation of the shock absorbers 33.

[0061] In further embodiments, referring to Figure 8, the convex seat 323 is provided with a blind hole 325, the blind hole 325 is provided with three, one of the blind holes 325 is close to the bolt seat 322 and is located on the line connecting the center of the bolt seat 322 and the center of the bearing seat 324, the other two blind holes 325 are close to the bearing seat 324 and are symmetrically arranged on the two sides of the line connecting the center of the bolt seat 322 and the center of the bearing seat 324, the blind hole 325 position can install bolts, used for the installation of the bottom end of the shock absorber 33, wherein the straight plate 321, the bolt seat 322, the blind hole 325 and the bearing seat 324 adopt an axisymmetric structure, so that the left and right arms 32 can be produced without distinguishing left and right, which can simplify the manufacturing equipment and manufacturing process, and the shock absorber 33 is inclinedly installed at the convex seat 323 through cooperation of the bolt and the blind hole 325, the blind hole 325 close to the bearing seat 324 is lower than the blind hole 325 close to the bolt seat 322, so that the top end of the shock absorber 33 can be inclined to the vehicle body 1, when the arm 32 swings around the rotating shaft 31, the stress direction of the shock absorber 33 is basically coincided with the axis of the shock absorber 33, avoiding damage of the shock absorber 33 caused by radial stress of the shock absorber 33 during deep shock absorption.

[0062] In further embodiments, in order to avoid that the large swing of the arm 32 affects the static centering of the steering structure, with reference to Figure 3 and Figure 6 , the second pull rod 44 comprises a middle rod 441, the two ends of the middle rod 441 are provided with end heads 442 through threaded rotation, the axis position of the end head 442 is provided with a threaded assembly hole, and rotation of the end head 442 can make the middle rod 441 rotate into the threaded assembly hole, so that the distance between the two end heads 442 is shortened, the length of the second pull rod 44 is adjustable, the distance between the steering knuckle 8 and the long branch rod 436 can be adjusted, and the direction deviation caused by the small deformation of the second pull rod 44 can be adapted, for example, the middle rod 441 is stress bent, the middle rod 441 can be rotated out of the two end heads 442 by a distance, the distance between the two end heads 442 is lengthened to compensate for the overall length shortening of the second pull rod 44 caused by the bending of the middle rod 441, so that the vehicle can be smoothly driven back to the repair point in the case of collision or other accidents, the ball head rod 443 is installed in the end head 442, the long branch rod 436 is provided with a vertical hole sleeve 437 connected with the ball head rod 443, and the steering knuckle 8 is connected with the same side end head 442 through the ball head rod 443, so that the second pull rod 44 is connected with the steering knuckle 8 and the free end of the long branch rod 436 through the ball head rod 443, the second pull rod 44 can be twisted in the radial direction as a whole, the frequent up and down changes of the arm 32 can be adapted, and stress bending of the long second pull rod 44 can be avoided.

[0063] In further embodiments, in order to ensure the dynamic centering of the steering structure, with reference to Figure 5The joint 34 comprises a fixed head 341 which is detachably connected with the free end of the branch arm 32, the joint 34 can be replaced alone, the easy-wearing parts can be maintained and replaced alone, the maintenance difficulty and cost are reduced, the fixed head 341 is provided with a rotating head 342 away from the end of the branch arm 32, the top ends of the two rotating heads 342 are inclined and close to each other, the middle part of the rotating head 342 is provided with a penetrating shaft 343, the top end of the penetrating shaft 343 is inclined away from the vehicle body 1, the rotating head 342 is assembled and connected with the steering knuckle 8 through the penetrating shaft 343, the inner inclination of the rotating head 342 makes the steering wheel 5 incline synchronously, and the backward inclination of the penetrating shaft 343 makes the steering wheel 5 incline synchronously, when steering in the forward direction, the inner inclination makes the steering resistance greater, the external force required when steering greatly is greater, the greater force required when steering greatly is ensured, misoperation is avoided, the steering is excessively influenced, the driving is stable, the steering return torque is improved, the vehicle can also realize stable return on the soft or wet ground, after steering is finished, the steering wheel 5 is returned smoothly, the driver does not need to apply the external force to the handlebar 2 all the time to keep straight, when driving on the undulating road surface such as the sand beach and the grassland, the driving is stable and the driving difficulty is reduced.

[0064] The above merely describes the preferred embodiment of the present application, but not for limiting the protection scope of the present application.

Claims

1. An electric vehicle steering assembly, characterized by, Include: The vehicle body (1) is provided with a load beam (6) at the end, and the vehicle body (1) is installed above the load beam (6) The handlebar (2) includes a steering column (23); Suspension (3), the suspension (3) includes a rotating shaft (31), one end of the rotating shaft (31) is rotatably connected with a support arm (32), and the free end of the two support arms (32) extends away from the vehicle body (1) Direction horizontally and detachably installed with joint (34), the middle part of the two support arms (32) and the load beam (6) are connected with a vertical shock absorber (33); Connecting piece (4), the connecting piece (4) includes two rocker arms (43), two rocker arms (43) are integrally formed by a hole disc (431), a short support rod (432) and a long support rod (436), the hole disc (431) is rotatably connected with the load beam (6), the short support rod (432) and the steering column (23) are connected through a torsion piece and are twisted synchronously, and the free end of the long support rod (436) is provided with a second pull rod (44); Knuckle (8), the knuckle (8) includes a knuckle disc (81), the knuckle disc (81) is swing connected with the joint (34), and the knuckle disc (81) is provided with a knuckle arm (82) at the top, and the knuckle arm (82) is connected with the second pull rod (44); The torsion piece includes a rotating plate (451), a sliding port (454) is arranged above the free end of the short support rod (432), a roller set (46) is arranged in the sliding port (454), and the roller set (46) is arranged on the free end of the short support rod (432); The roller set (46) includes a conical roller (461) and a straight roller (462), the straight roller (462) is arranged on the inner side of the sliding port (454) at the lower part, a straight chamfer surface (455) is arranged on the sliding port (454), and the conical roller (461) is arranged at the straight chamfer surface (455) of the sliding port (454).

2. The electric vehicle steering assembly of claim 1, wherein, The torsion piece includes a relay frame (45), the relay frame (45) includes a middle seat (452), the middle seat (452) is embedded and arranged at the bottom end of the vertical steering column (23) through a cross pin (453), and the middle seat (452) is provided with a rotating plate (451) at the bottom end.

3. The electric vehicle steering assembly of claim 1, wherein, The support arm (32) includes a straight plate (321), the straight plate (321) is provided with a bolt seat (322) and a bearing seat (324) at both ends, the bearing seat (324) is connected with the rotating shaft (31) through a bearing, the bolt seat (322) is detachably connected with the joint (34) through a bolt, and the straight plate (321) is provided with a convex seat (323) at the middle part, and the shock absorber (33) is arranged at the position of the convex seat (323).

4. The electric vehicle steering assembly of claim 3, wherein, The bearing beam (6) comprises a main frame (61), a shock absorber seat (62) is installed on the side away from the vehicle body (1), the top end of the shock absorber (33) is installed at the position of the shock absorber seat (62), a sub-frame (63) is connected between the shock absorber seat (62) and the main frame (61), and the anti-collision cover (7) is installed at the position corresponding to the shock absorber seat (62) of the sub-frame (63).

5. The electric vehicle steering assembly of claim 3, wherein, The protruding seat (323) is provided with three blind holes (325), one of which is close to the bolt seat (322) and located on the line connecting the center of the bolt seat (322) and the center of the bearing seat (324), and the other two are close to the bearing seat (324) and symmetrically arranged on both sides of the line connecting the center of the bolt seat (322) and the center of the bearing seat (324), and the shock absorber (33) is obliquely installed at the protruding seat (323) through cooperation of the bolt and the blind hole (325).

6. The electric vehicle steering assembly of claim 1, wherein, The second pull rod (44) comprises a middle rod (441), end heads (442) are rotatably connected to both ends of the middle rod (441) through threads, ball head rods (443) are installed in the end heads (442), vertical hole sleeves (437) are installed at the free ends of the long branch rods (436) and are connected with the ball head rods (443), and the knuckles (8) are connected with the end heads (442) on the same side through the ball head rods (443).

7. The electric vehicle steering assembly of claim 1, wherein, The joint (34) comprises a fixed head (341) which is detachably connected with the free end of the branch arm (32), a rotating head (342) is arranged at the end of the fixed head (341) away from the branch arm (32), the top ends of the two rotating heads (342) are inclined and close to each other, a penetrating shaft (343) is arranged in the middle of the rotating head (342), the top end of the penetrating shaft (343) is inclined away from the vehicle body (1), and the rotating head (342) is connected with the knuckle (8) through the penetrating shaft (343).

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