CN104075893B - A kind of Electric Motor Wheel with turning function is comprehensive performance test bed - Google Patents

Abstract

The invention discloses an electric wheel comprehensive performance test bench with steering function, comprising: a gantry frame, a king pin frame and a steering mechanism; wherein, the steering mechanism includes a worm box, a motor, a second connecting piece and a steering force sensor, and the worm box One end is provided with a first connecting piece, and the other end is provided with a ball screw; the worm box of the steering mechanism is universally connected to the gantry frame through the first connecting piece, the motor of the steering mechanism is connected with the worm box of the steering mechanism, and one end of the second connecting piece It is universally connected with the movable end of the ball screw of the steering mechanism, and the other end is movably connected with the steering force sensor, and the steering force sensor is fixedly connected with the king pin frame. Through the above embodiment, the steering control is simple and stable, which is beneficial to obtain more accurate results in the subsequent electric wheel lateral loading simulation test, and further contributes to the research on the complete electric vehicle.

Description

A comprehensive performance test bench for electric wheels with steering function

technical field

The invention relates to the technical field of automobiles, in particular to an electric wheel comprehensive performance test bench.

Background technique

The existing electric wheel test bench can only simulate the driving conditions of the car in a straight line, without the design of the steering mechanism, it cannot completely simulate various real driving conditions of the car.

However, under the actual road conditions of the vehicle, not only the vertical load of each wheel will change continuously, but also the wheel will deform to a certain extent under the action of lateral force when turning. When the electric wheel comprehensive performance test bench simulates the real vehicle working conditions, it must be able to apply vertical load and lateral load to the electric wheel to simulate the vertical and lateral load of the vehicle on the real road surface, and these two loads must be controllable , can change at any time.

Specifically, side loading is usually divided into dynamic loading and static loading. The dynamic loading can adjust the load at any time according to the needs during the test, and according to the different loading methods, the prior art lateral loading device mainly adopts the hydraulic loading method.

Among them, the hydraulic loading method uses the hydraulic cylinder to directly load along the load direction through the lever. Although the realization principle of the hydraulic loading method is simple, the control is relatively unstable, resulting in large errors in the simulation results, which in turn affects the research on the electric vehicle.

Contents of the invention

In order to solve the above technical problems, the present invention provides a comprehensive performance test bench for electric wheels with steering function. Vehicle research.

In order to solve the above technical problems, the present invention provides a comprehensive performance test bench for electric wheels with a steering function, including: a gantry frame, a kingpin frame and a steering mechanism, and the kingpin frame is used for detachable installation of the electric wheel for testing ; Wherein, the steering mechanism includes a worm box, a motor, a second connector and a steering force sensor, one end of the worm box is provided with a first connector, and the other end is provided with a ball screw; the worm box of the steering mechanism passes through The first connecting piece is universally connected to the gantry, the motor of the steering mechanism is connected to the worm box of the steering mechanism, and one end of the second connecting piece is connected to the movable end of the ball screw of the steering mechanism The other end of the universal connection is movably connected with the steering force sensor, and the steering force sensor is fixedly connected with the kingpin frame.

Further, the first connecting piece includes a connecting frame with a fixed bushing at one end, a first outer bracket, an inner bracket and a first pin shaft, wherein the inner bracket is connected to the first pin shaft through the first pin shaft. An outer bracket is hinged, the vertical shaft of the inner bracket is inserted into the fixed sleeve of the connecting frame, and the other end of the connecting frame is welded to the gantry frame, wherein the inner bracket is a claw fork.

Further, the second connecting piece includes a second outer bracket, a second pin shaft and a spacer, wherein the second outer bracket is connected to the movable end of the ball screw of the steering mechanism through the second pin shaft. hinged, and a fixed bushing is welded on the steering force sensor, the vertical shaft of the second outer bracket is inserted into the fixed bushing of the steering force sensor, and the two ends of the spacer are respectively fixedly connected to the steering The force sensor and the kingpin frame, wherein the second outer support is a claw fork.

Further, the test bench includes a vertical loading mechanism, and the vertical loading mechanism includes a motor, a worm box provided with a ball screw, a bidirectional pressure connector, a tension pressure sensor and a short gear; further, on the gantry beam A support is provided, the worm box of the vertical loading mechanism is fixed on the support, the motor of the vertical loading mechanism is arranged on the support and connected with the worm box of the vertical loading mechanism, and the vertical loading mechanism The movable end of the ball screw is inserted into one end of the two-way pressure connector, the other end of the two-way pressure connector is connected to the tension pressure sensor, the tension pressure sensor is connected to the short gear, and the short gear shaft The main pin is connected, and the main pin is connected with the main pin frame through a bearing.

Further, the vertical loading mechanism includes a stop fork, the stop fork includes a horizontal bar and a vertical bar intersecting each other, the horizontal bar is fixed on the ball screw of the vertical loading mechanism, and the vertical bar The rod is fixed on the beam of the gantry frame, wherein the vertical rod restricts the horizontal rod to move only in the length direction of the vertical rod, thereby restricting the ball screw of the vertical loading mechanism from rotating Can only move in the vertical direction.

Further, the vertical loading mechanism includes a long gear, and another bearing is arranged on the beam of the gantry frame, and the middle shaft of the long gear is inserted into the other bearing and can rotate horizontally, wherein, the long gear and The short gears are meshed, and an angular position sensor is provided on the surface of the long gears.

Further, the vertical loading mechanism includes an angle limiter, and the angle limiter is fixed on the surface of the long gear.

Further, the vertical loading mechanism includes an upper and lower stopper, and the upper and lower stoppers are fixed on the movable end of the ball screw of the vertical loading mechanism.

Further, the test stand includes a frame supporting the gantry, and the test stand also includes a drum supported by the frame, a torque speed sensor, a first pulley, a flywheel, a clutch, and a second belt wheel; wherein, the rotating drum and the first pulley are connected to both sides of the torque speed sensor respectively, the first pulley and the second pulley are connected by a belt, and the clutch shaft is connected to On one side of the second pulley, the flywheel shaft is connected to a side of the clutch away from the second pulley.

Further, the test bench further includes an electric dynamometer supported by the frame, wherein the electric dynamometer is axially connected to the other side of the second pulley.

The electric wheel comprehensive performance test bench of the embodiment of the present invention: the steering mechanism drives the worm gear of the worm box by the motor, then drives the turbine, then drives the ball screw and then applies the steering force to the electric wheel through the kingpin frame, and its steering control It is simple and stable, which is conducive to obtaining more accurate results in the subsequent electric wheel lateral loading simulation test, which in turn is helpful for the research of the electric vehicle. Moreover, by setting the steering force sensor to obtain the magnitude of the lateral load in real time, it can be based on the The magnitude of the side load further dynamically adjusts the steering force applied to the electric wheels, which is closer to the actual driving conditions.

Description of drawings

Fig. 1 is a schematic diagram of an embodiment of an electric wheel comprehensive performance test bench of the present invention.

Fig. 2 is a front view of the embodiment of the electric wheel comprehensive performance test bench of the present invention.

Fig. 3 is a side view of the embodiment of the electric wheel comprehensive performance test bench of the present invention.

Fig. 4 is a front view of the steering mechanism in the test bench shown in Fig. 3 .

Fig. 5 is a side view of the steering mechanism in the test bench shown in Fig. 3 .

Fig. 6 is another side view of the embodiment of the electric wheel comprehensive performance test bench of the present invention.

Fig. 7 is another front view of the embodiment of the electric wheel comprehensive performance test bench of the present invention.

detailed description

The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

The electric wheel comprehensive performance test bench according to the embodiment of the present invention is mainly used for the electric wheel test of pure electric vehicles. Referring to Fig. 1 and Fig. 2, this test stand comprises frame 20 and gantry 17-8, also comprises road simulation mechanism, inertial simulation mechanism, power mechanism, vertical loading mechanism 17 and independent one or more in steering mechanism 18 The combination.

The full text takes the combination of the test bench including the frame 20, the gantry frame 17-8 installed on the frame 20, the road simulation mechanism, the inertia simulation mechanism, the power mechanism, the vertical loading mechanism 17 and the steering mechanism 18 as an example to describe in detail.

The road simulation mechanism includes a drum 4 , a torque speed sensor 7 for collecting the torque and speed of the drum 4 , and a first pulley 9 . The inertia simulation mechanism includes a flywheel 13 , a clutch 12 and a second pulley 10 . The power mechanism mainly includes an electric dynamometer 14, which can be selectively in the power generation mode for resistance simulation, or selectively in the motor mode for braking simulation. Specifically, when the power mechanism is in the motor mode, it includes an electric dynamometer 14 and a power supply (not shown) that provides power for the electric dynamometer 14; when the power mechanism is in the power generation mode, it includes the electric dynamometer 14 and the power consumption device for consuming the electric energy generated by the power dynamometer 14 in the power generation mode. Energy device (not shown in the figure), of course, in order to improve the utilization rate of resources, the energy consumption device can be replaced by an energy storage device such as a storage battery. Wherein, the flywheel 13 and the electric dynamometer 14 are connected to the two sides of the second pulley 10 respectively, and the clutch 12 is arranged between the second pulley 10 and the flywheel 13; wherein, the first pulley 9 and the second pulley are connected by a belt. The pulley 10 connects the drum mechanism and the power mechanism as a whole to realize mutual power transmission.

Specifically, the road simulation mechanism also includes a first bearing 51, a second bearing 52, a third bearing 53, a fourth bearing 54, a first coupling 61 and a second coupling 62, wherein the rotating drum 4 is connected to Between the first bearing 51 and the second bearing 52, the rotating shaft of the first pulley 9 is connected between the third bearing 53 and the fourth bearing 54, and the first coupling 61 and the second coupling 62 are respectively arranged on On both sides of the torque speed sensor 7, further, the first shaft coupling 61 is connected between the second bearing 52 and the torque speed sensor 7, and the second shaft coupling 62 is connected to the third bearing 54 and the torque speed sensor between 7. Moreover, the power mechanism includes a fifth bearing 55, a sixth bearing 56, and a third coupling 63, the second pulley 10 is connected between the fifth bearing 55 and the sixth bearing 56, and the third coupling 63 is connected to the shaft. between the electric dynamometer 14 and the fifth bearing 55 .

Wherein, the frame 20 supports and fixes the road simulation mechanism, the inertia simulation mechanism and the power mechanism. Specifically, as shown in the figure, the first to sixth bearings (51, 52, 53, 54, 55, 56) and torque The rotational speed sensor 7 is installed on the frame 20 to realize the support and fixation of the frame 20 to the road simulation mechanism, the inertia simulation mechanism and the power mechanism.

In this embodiment, adding a flywheel 13 can realize inertial simulation, simulating the inertial force when the vehicle accelerates. Adding an electric dynamometer 14, through the use of the two-way mode of the electric dynamometer 14, specifically, when the electric dynamometer 14 is in the power generation mode, the electric dynamometer 14 is used as an energy absorbing device to perform resistance simulation, and through the electric load The dynamic loading form simulates the sum of various resistances other than the rolling resistance suffered by the electric wheel when the car is running, and can coordinate with the flywheel 13 to realize the stepless adjustment of the inertia of the car; when the electric dynamometer 14 is in the motor mode, The electric dynamometer 14 drives the entire test bench (including the drum 4 and the flywheel 13) to run, and further drives the electric wheel to run to a certain working condition through the drum 4, and then stops supplying power to the electric dynamometer 14, simulating the braking of a car. According to the working conditions, various braking simulation tests can be carried out, such as mechanical braking, electric regenerative braking and mechanical and electric regenerative coupling braking simulation tests. In addition, because the rated power of the electric wheel's own motor is limited, such as when simulating braking, it is not enough to drive the entire test bench to work, and the electric wheel itself is to be tested, that is, the actual conditions of the parameters that need to be tested are unknown. While the electric dynamometer 14 is known and adjustable, the motor of the electric wheel itself is not suitable for replacing the function of the electric dynamometer 14 in the whole test bench, especially during braking simulation.

Further, referring to Fig. 1, the electric wheel includes a wheel 3, an in-wheel motor 1 and a brake disc 2, wherein the in-wheel motor 1 is fixed in the wheel 3, the brake disc 1 is installed on the wheel 3, and the kingpin 15 passes through a linear bearing ( (not shown in the figure) is connected with the wheel shaft (not shown in the figure) of the wheel 3. Combined with the structural characteristics of the electric wheel itself, the test bench can combine the brake disc 1 that comes with the electric wheel to simulate mechanical braking, and can also perform electric regenerative braking and electric regenerative braking-mechanical brake coupling simulation tests.

In the specific application embodiment, continue to refer to Fig. 1, the test bench includes a kingpin frame 15 for detachably installed electric wheels for testing, the kingpin frame 15 is arranged above the drum 4 and is movably connected to the gantry frame 17- 8 on. As shown in Figure 3, for simple design, the main pin frame 15 can adopt an inverted L-shaped structure, specifically, the king pin frame 15 includes a top wall and a side wall connected to each other, wherein the side wall of the king pin frame 15 is used for The electric wheel for testing is installed, and the kingpin 16 is arranged on the kingpin frame 15 and is connected with the kingpin frame 15 by a needle bearing (not shown).

Further, referring to Fig. 3-Fig. 5, the test bench includes a steering mechanism 18, a steering force sensor 18-9 for detecting the magnitude of the steering force is fixed on the movable end of the steering mechanism 18, and the steering mechanism 18 The movable end is also fixedly connected to the kingpin frame 15 through a steering force sensor 18-9, and the steering mechanism 18 is used to apply a steering force to the electric wheel mounted on the kingpin frame 15 through the kingpin frame 15 to drive the electric wheel to turn. in particular:

Steering mechanism 18 comprises that one end is provided with the first connector, the other end is provided with the worm box 18-3 of ball screw 18-7, motor 18-1, the second connector and steering force sensor 18-9; The worm box 18-3 is universally connected to the gantry 17-8 through the first connector, and the motor 18-1 of the steering mechanism 18 is connected to the worm box 18-3 of the steering mechanism 18. Specifically, the motor 18-1 is connected to the worm The relative position is fixed by a connecting bracket 18-2 between the boxes 18-3, one end of the second connecting piece is universally connected with the movable end of the ball screw 18-7 of the steering mechanism 18, and the other end is movable with the steering force sensor 18-9 connected, the steering force sensor 18-9 is fixedly connected with the second connecting piece.

In a specific application embodiment, the first connecting member includes a connecting frame 18-11 with a fixed bushing (not shown) at one end, a first outer bracket 18-4, an inner bracket 18-6, and a first pin shaft 18 -51, wherein, the inner support 18-6 is hinged with the first outer support 18-4 through the first pin shaft 18-51, the vertical shaft of the inner support 18-6 is inserted into the fixed bushing of the connecting frame 18-11, and the connecting frame The other end of 18-11 is welded on portal frame 17-8. And the second connector comprises the second outer support 18-8, the second bearing pin 18-52 and pad 18-10, wherein, the second outer support 18-8 is connected with the steering mechanism 18 by the second bearing pin 18-52. The movable end of the ball screw 18-7 is hinged, and a fixed axle sleeve (not shown) is welded on the steering force sensor 18-9, and the vertical shaft of the second outer support 18-8 is inserted into the steering force sensor 18-9. Fixed axle sleeve, pad 18-10 two ends are welded to steering force sensor 18-9 and kingpin frame 15 respectively. The inner support 18-6 and the second outer support 18-8 can be selected from the claw fork, and the first outer support 18-4, the inner support 18-6 and the first pin shaft 18-51 in the first connector constitute the universal support structure ; The second outer bracket 18-8 in the second connector, the movable end of the ball screw 18-7 and the second pin shaft 18-52 also constitute the universal bracket structure.

When turning, the motor 18-1 of the steering mechanism 18 starts (forward or reverse), drives the worm gear (not shown) of the worm case 18-3 to rotate forward or reversely, and then drives the worm gear ( (not shown in the figure) rotates, and then drives the movable end of the ball screw 18-7 to move left or right, and the steering force is transmitted to the kingpin frame 15 through the second outer bracket 18-8 through the steering force sensor 18-9, and then Make the kingpin frame 15 drive the electric wheel to rotate around the kingpin 16, wherein, the second outer bracket 18-8 follows the rotation of the kingpin frame 15 and rotates in the fixed bushing of the steering force sensor 18-9. The follow-up rotation of the bracket 18-8 further drives the inner bracket 18-6 to rotate in the fixed bushing of the connecting frame 18-11, so as to realize the simulated steering. Further, the steering force sensor 18-9 acquires the magnitude of the steering force in real time, and then monitors the steering force during the process of simulating the steering. Through the road test after the electric wheel turns, it can be tested whether the electric wheel can work stably for a long time at the turning point and the internal components, and it also provides the material basis and conditions for the relevant anti-skid experiment, making the overall experiment of the electric wheel more accurate. close to the actual driving conditions. In addition, the steering mechanism 18 of this embodiment uses the motor 18-1 to drive the worm box 18-3, and then drives the ball screw 18-7 to apply the steering force to the electric wheel through the kingpin frame 15, and its control is simple. , stability, the lateral force produced by the road test after steering and the friction balance is acquired by the lateral force sensor 19 in real time.

In another specific application embodiment, refer to FIG. 6 and FIG. 7, the test bench also includes a vertical loading mechanism 17, the vertical loading mechanism 17 is connected with the main pin frame 15 through the main pin 16, and then passes through the main pin 16 in turn. 1. The transmission of the king pin frame 15 applies load to the electric wheel installed on the king pin frame 15 . Specifically, the vertical loading mechanism 17 includes a motor 17-1, a worm box 17-2 provided with a ball screw 17-4, a two-way pressure connector 17-6, a tension pressure sensor 17-7 and a bearing 17-14; Frame 17-8 crossbeam is provided with a support 17-3, and the worm box 17-2 of vertical loading mechanism 17 is fixed on the support 17-3, and the motor 17-1 of vertical loading mechanism 17 is arranged on the support 17-3 and with The worm box 17-2 of the vertical loading mechanism 17 is connected, and the movable end of the ball screw 17-4 of the vertical loading mechanism 17 is inserted into one end of the two-way pressure connector 17-6, and the other end of the two-way pressure connector 17-6 is connected to the pulley. Pressure sensor 17-7, Kingpin 16 one end passes bearing 17-14 and then is connected with pulling pressure sensor 17-7 rotating shaft, Kingpin 16 other end is connected with Kingpin frame 15 by needle roller bearing.

When a vertical load is applied, the motor 17-1 starts (forward or reverse), drives the worm (not shown) of the worm box 17-2 to rotate forward or reversely, and then drives the turbine of the worm box 17-2 to rotate, and then drives The ball screw 17-4 moves up or down, and is transmitted to the kingpin 16 through the two-way pressure connector 17-6 and the tension pressure sensor 17-7, and then the vertical load is applied to the electric wheel through the kingpin frame 15. Wherein, the ball screw 17-4 moves upward, the vertical load decreases, and the ball screw 17-4 moves downward, the vertical load increases. By adopting the vertical loading mechanism 17 that electrically loads the vertical load, it is possible to simulate the up and down jumping of the electric wheel when driving on the road, test and check whether the internal components of the motor of the electric wheel can work stably for a long time under the condition of vibration and shock, and cooperate with the braking system Carry out a series of tests such as ABS test and composite braking test to simulate vertical loads such as the self-weight and load of the vehicle in actual driving conditions. In addition, the vertical loading mechanism 17 of this embodiment uses the motor 17-1 to drive the worm box 17-2, and then drives the ball screw 17-4 to apply the vertical load to the electric wheel, and its control is simple and stable. The result of the vertical loading simulation test is accurate, which is beneficial to the research on the electric vehicle, and the vertical load can be obtained in real time by setting the tension and pressure sensor 17-7, and the vertical load applied to the electric wheel can be further dynamically adjusted according to the vertical load. The vertical load is closer to the actual driving conditions.

Combined with the gimbal structure design of the first connector and the second connector in the steering mechanism 18 above, when the vertical loading mechanism 17 is carrying out vertical loading, as the load increases or decreases, the main pin frame 15 will move in the vertical direction. Displacement occurs on the top, and the second outer bracket 18-8 fixed with the king pin frame 15 rotates around the second pin shaft 18-52, and at the same time, the second outer bracket 18-8 follows the rotation in the vertical direction The inner bracket 18 - 6 is further driven to rotate around the first pin shaft 18 - 51 , so that the vertical loading of the vertical loading mechanism 17 does not affect the steering of the steering mechanism 18 .

Preferably, the vertical loading mechanism 17 includes a stop fork 17-13, and the stop fork 17-13 includes a horizontal bar 17-131 and a vertical bar 17-132 intersecting each other, and the horizontal bar 17-131 is fixed on the bottom of the vertical loading mechanism 17. On the ball screw 17-4, the vertical rod 17-132 is fixed on the gantry frame 17-8 crossbeam, wherein the vertical rod 17-132 limits the horizontal rod 17-131 to the length direction of the vertical rod 17-132. Upward movement makes the ball screw 17-4 of the vertical loading mechanism 17 unable to rotate but can only move up and down, thereby ensuring that the movable end of the ball screw 17-4 of the vertical loading mechanism 17 can only move up and down, which can better The ground simulates the application of vertical loads to improve the accuracy of vertical load simulation (ie vehicle weight simulation) results.

Preferably, the vertical loading mechanism 17 includes a long gear 17-9 and a short gear 17-10, and a bearing 17-15 is also provided on the beam of the gantry 17-8, and the center shaft of the long gear 17-9 is inserted into the bearing 17-10. 15 can be rotated horizontally, wherein the short gear 17-10 is located on the bearing 17-14, one end of the middle shaft of the short gear 17-10 is connected with the tension pressure sensor 17-7, and the other end is connected with the main pin 16 rotating shaft, and, The long gear 17-9 meshes with the short gear 17-10. An angular position sensor (not shown) is fixed on the surface of the long gear 17-9. The angular position sensor is used to collect the steering angle of the electric wheel during the electric wheel steering process. . In addition, by arranging the long gear 17-9 and fixing the angular position sensor on the surface of the long gear 17-9, the steering angle of the electric wheel can be obtained without affecting the vertical load applied by the vertical loading mechanism 17 to the electric wheel. .

And, in the actual driving condition, the steering angle of the electric wheel is not infinite. For simulating the actual driving condition, an angle limiter 17-11 is also fixed on the surface of the long gear 17-9, which is different from the angle limiter. Positioner 17-11, for example, a chute (not shown) can be set in the horizontal direction of the gantry 17-8 column, the chute can be designed to be arc-shaped, and the radian of the arc can be according to the electric vehicle When turning, the angle design that the electric wheel can actually turn over is designed. When the steering force applied by the steering mechanism 18 is finally transmitted to the electric wheel on the kingpin frame 15 through a series of elements, even if the steering force is large enough, the angle limiter will pass through the angle limiter. 17-11 limits the electric wheel to only rotate within the preset rotation angle range, so as to be closer to the actual driving conditions.

Preferably, the vertical loading mechanism 17 includes an upper and lower limiter 17-5, and the upper and lower limiter 17-5 is fixed on the movable end of the ball screw 17-4 of the vertical loading mechanism 17. Of course, in order to cooperate with the upper and lower limiter 17-5 restricts the movement stroke of the ball screw 17-4, for example, a chute (not shown) can be arranged on the column of the gantry frame 17-8, and the chute is along the height direction of the column of the gantry frame 17-8 set, and a contact point (not shown) is respectively arranged at the upper and lower ends of the chute, and when the upper and lower stopper 17-5 touches the contact point, the ball screw 17-4 stops immediately and continues to the direction of the contact point. sports.

In the above-described embodiment, preferably, the kingpin 16 is installed on the kingpin frame 15, and when the electric wheel is installed on the kingpin frame 15, the kingpin 16 is directly above the electric wheel so that the offset distance of the kingpin 16 is Zero, and then ensure that the electric wheel is always in contact with the highest point of the drum 4, that is, when straight and turning, the electric wheel will be in contact with the highest point of the drum 4, which can avoid the fact that the offset distance of the main pin 16 is not zero. , the steering angle of the electric wheel is too large to cause the tire to break away from the test error caused by the highest point of the drum 4.

In summary, the test bench of the embodiment of the present invention has the following advantages:

(1) It can carry out road simulation, resistance simulation, vehicle weight simulation and inertia simulation;

(2) Braking simulation can perform mechanical braking, electric feedback braking and mechanical and electric feedback coupling braking simulation.

(3) The steering mechanism can realize the simulation of the lateral force when the electric wheel is turned in the actual driving condition.

(4) The vertical loading mechanism can realize the vertical load simulation of the self-weight and load of the electric wheel in the actual driving condition.

(5) From the above (1), (2), (3) and (4), the two-way loading simulation test, inertia simulation and braking simulation of the electric wheel can be realized at the same time, and the significance of the test bench is greater than the existence of only (1 ), (2), (3) or (4) are single, which is closer to the actual driving conditions and is conducive to improving the accuracy of the test results.

The above is only the embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process conversion made by using the description of the present invention and the contents of the accompanying drawings, or directly or indirectly used in other related technical fields, All are included in the scope of patent protection of the present invention in the same way.

Claims (10)

1. An electric wheel comprehensive performance test stand with steering function, characterized in that it comprises: Gantry frame, kingpin frame and steering mechanism, the kingpin frame is used for detachable installation of electric wheels for testing; Wherein, the steering mechanism includes a worm box, a motor, a second connecting piece and a steering force sensor, and the first connecting piece is provided at one end of the worm box, and a ball screw is provided at the other end; The worm box of the steering mechanism is universally connected to the gantry frame through the first connecting piece, the motor of the steering mechanism is connected to the worm box of the steering mechanism, and one end of the second connecting piece is connected to the steering The movable end of the ball screw of the mechanism is universally connected, and the other end is movably connected with the steering force sensor, and the steering force sensor is fixedly connected with the kingpin frame; The first connector includes a connecting frame with a fixed bushing at one end, a first outer bracket, an inner bracket and a first pin, wherein the inner bracket connects with the first outer bracket through the first pin Hinged, the vertical shaft of the inner bracket is inserted into the fixed sleeve of the connecting frame, and the other end of the connecting frame is welded to the gantry frame; The second connecting piece includes a second outer bracket, a second pin shaft and a spacer, wherein the second outer bracket is hinged to the movable end of the ball screw of the steering mechanism through the second pin shaft, and , a fixed bushing is welded on the steering force sensor, the vertical shaft of the second outer bracket is inserted into the fixed bushing of the steering force sensor, and the two ends of the spacer are fixedly connected to the steering force sensor and the steering force sensor respectively. The Kingpin Rack. 2. The electric wheel comprehensive performance test bench according to claim 1, characterized in that: The inner bracket is a claw fork. 3. The electric wheel comprehensive performance test bench according to claim 1, characterized in that: The second outer support is a claw fork. 4. The electric wheel comprehensive performance test bench according to any one of claims 1-3, characterized in that: The test bench includes a vertical loading mechanism, and the vertical loading mechanism includes a motor, a worm box provided with a ball screw, a two-way pressure connector, a tension pressure sensor and a short gear; Further, a bracket is provided on the gantry beam, the worm box of the vertical loading mechanism is fixed on the bracket, the motor of the vertical loading mechanism is arranged on the bracket and connected with the vertical loading mechanism The worm box is connected, the movable end of the ball screw of the vertical loading mechanism is inserted into one end of the two-way pressure connector, the other end of the two-way pressure connector is connected to the tension pressure sensor, and the tension pressure sensor is connected to the Described stub gear, described stub gear rotating shaft connects described king pin, and described king pin links to each other with king pin frame through bearing. 5. The electric wheel comprehensive performance test bench according to claim 4, characterized in that: The vertical loading mechanism includes a stop fork, the stop fork includes a horizontal bar and a vertical bar intersecting each other, the horizontal bar is fixed on the ball screw of the vertical loading mechanism, and the vertical bar is fixed on the On the gantry crossbeam, wherein, the vertical rod restricts the horizontal rod to move only in the length direction of the vertical rod, thereby restricting the ball screw of the vertical loading mechanism from being able to rotate but only in the Movement in the vertical direction. 6. The electric wheel comprehensive performance test bench according to claim 4, characterized in that: The vertical loading mechanism includes a long gear, and another bearing is arranged on the beam of the gantry frame, and the middle shaft of the long gear is inserted into the other bearing and can rotate horizontally, wherein, the long gear and the short The gears are meshed, and an angular position sensor is provided on the surface of the long gear. 7. The electric wheel comprehensive performance test bench according to claim 6, characterized in that: The vertical loading mechanism includes an angle limiter, and the angle limiter is fixed on the surface of the long gear. 8. The electric wheel comprehensive performance test bench according to claim 4, characterized in that: The vertical loading mechanism includes an upper and lower limiter, and the upper and lower limiter is fixed on the movable end of the ball screw of the vertical loading mechanism. 9. The electric wheel comprehensive performance test bench according to claim 1, characterized in that: The test stand includes a frame supporting the gantry, and the test stand also includes a drum supported by the frame, a torque speed sensor, a first pulley, a flywheel, a clutch, and a second pulley; Wherein, the rotating drum and the first pulley are connected to both sides of the torque speed sensor respectively, the first pulley and the second pulley are connected by a belt, and the clutch shaft is connected to the One side of the second pulley, the flywheel shaft is connected to the side of the clutch away from the second pulley. 10. The electric wheel comprehensive performance test bench according to claim 9, characterized in that: The test bench further includes an electric dynamometer supported by the frame, wherein the electric dynamometer is axially connected to the other side of the second pulley.