New energy automobile electronic power steering system test line

Abstract

The invention provides a new energy automobile electronic power-assisted steering system test line which comprises a structural frame and further comprises a test frame at the top of the structural frame, a traction mechanism is arranged at the top of the structural frame, a to-be-tested structure is arranged on one side of the test frame, a test mechanism is arranged at the top of the test frame, and the traction mechanism is arranged on the test frame. The top of the test frame is provided with a positioning mechanism, the top of the test frame is provided with an output docking mechanism, and the top of the test frame is provided with a steering simulation mechanism. In the testing process, only the steering torque sensor at the steering column end, the control unit and the motor in the system need to be tested, and the testing efficiency is greatly improved while the testing effect is ensured through a plurality of rapid butt joint installation modes.

Description

Technical Field

[0001] The present invention relates to the field of mechanical device performance testing, and in particular to a test line for an electronic power steering system of a new energy vehicle. Background Art

[0002] The electric power steering system is a power steering system that directly relies on the motor to provide auxiliary torque. Compared with the traditional hydraulic power steering system HPS, the EPS system has many advantages. EPS is mainly composed of a torque sensor, a vehicle speed sensor, an electric motor, a reduction mechanism and a control unit.

[0003] Chinese patent CN201310219261.8 discloses a vehicle electronic power steering system test device and method, the device includes a base with a horizontal upper surface, the upper surface of the base is installed from left to right: limit platform I, elastic component I, first guide rod, gear rack steering gear I, tension pressure sensor I, gear rack steering gear II, tension pressure sensor II, second guide rod, elastic component II and limit platform II. The device can measure the power-assistance characteristics of EPS at different turning angles and vehicle speeds.

[0004] However, the applicability of this technical solution is low. For example, the traditional test device requires manual docking of the electronic power steering system to the test device. Especially in the installation operation of different batches of electronic power steering systems, a lot of time and manpower are needed for preparation. Summary of the invention

[0005] The purpose of the present invention is to provide a new energy vehicle electronic power steering system test line in view of the shortcomings of the prior art, to achieve a quick docking and installation function by cooperating with a positioning docking mechanism through a testing mechanism, and to solve the problem of low applicability.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A test line for an electronic power steering system for a new energy vehicle comprises a structural frame and a test frame on the top of the structural frame, wherein a traction mechanism is arranged on the top of the structural frame, a structure to be tested is arranged on one side of the test frame, a test mechanism is arranged on the top of the test frame, a positioning mechanism is arranged on the top of the test frame, an output docking mechanism is arranged on the top of the test frame, and a steering simulation mechanism is arranged on the top of the test frame; the test mechanism comprises two groups of support frames arranged on the top of the test frame, the tops of the two groups of support frames are both equipped with suspension frames, two groups of load-bearing vertical plates are installed on the top of the crossbar of the test frame, bushing rods are installed on one side of the two groups of load-bearing vertical plates, an output rod is arranged inside the bushing rod, a test wheel is suspended at the bottom of the suspension frame, a coupling is arranged on the inner side of the test wheel, and the coupling An external pull rod is installed at the bottom, and an output cross universal joint shaft assembly is arranged on the outer side of the bushing rod; the positioning mechanism includes an L-shaped support plate arranged on one side of the test frame, and the top of the L-shaped support plate is fixedly connected to a positioning seat, and the top of the positioning seat is fixedly connected to a U-shaped positioning plate; the output docking mechanism includes a clamping base arranged at the top end of a group of universal joint sleeves of the output cross universal joint shaft assembly, two groups of base side plates are fixedly connected to the outer side of the clamping base, and two groups of docking slides are movably connected to the top of the clamping base, and an electromagnetic seat is installed on one side of the docking slide; the steering simulation mechanism includes a supporting bottom plate arranged on one side of the L-shaped support plate, a mounting plate is arranged on one side of the supporting bottom plate, a simulation motor is installed on the top of the mounting plate, and an input chuck is arranged at the bottom end of the output shaft of the simulation motor.

[0008] The traction mechanism includes a traction frame arranged on one side of the structural frame, a traction shaft is arranged on the top of the structural frame, a plurality of traction bearings are installed on the top of the structural frame, a traction motor is installed on the top of the traction frame, a reducer is arranged on one side of the traction motor, a traction universal joint is arranged at one end of the traction motor and the reducer output shaft, two groups of traction wheels are arranged on the outer side of the traction shaft, and a speed sensor is installed at one end of the traction shaft.

[0009] The structure to be tested includes a steering column arranged on the top of the test frame, a steering input end is provided at one end of the steering column, an assembly part is provided on the outside of the steering column, a control unit is provided at one end of the steering column, a power assist motor is installed on one side of the control unit, and a steering output end is provided at the other end of the steering column.

[0010] The testing mechanism further comprises a suspension shaft arranged at the top of the coupling, a suspension spring is arranged on the outer side of the top end of the suspension shaft, and an angle sensor is installed on the top of the suspension shaft.

[0011] The testing mechanism also includes an output torque sensor arranged on the outer side of the rotating shaft at the bottom end of the output cross universal shaft assembly.

[0012] The positioning mechanism also includes two groups of outer extension plates arranged on the outside of the U-shaped positioning plate, the tops of the two groups of outer extension plates are provided with positioning rods, the outsides of the two groups of outer extension plates are provided with limiting side plates, and one side of the limiting side plate is provided with a lifting groove.

[0013] The positioning mechanism also includes a slide rail base plate arranged on one side of the limiting side plate, a driving motor is installed on one side of the slide rail base plate, a driving screw is connected to the bottom end of the driving motor output shaft, a plurality of screw bearing seats are arranged on the outer side of the driving screw, a lifting slide rail is fixedly connected to one side of the slide rail base plate, a lifting slider is movably connected to one side of the lifting slide rail, a screw slider is installed on one side of the lifting slider, a screw nut is installed inside the screw slider, and a pressure output plate is fixedly connected to one side of the screw slider.

[0014] The output docking mechanism also includes multiple groups of compression spring sleeve rods arranged on one side of the two groups of docking slides, the outer sides of the two groups of docking slides are fixedly connected with two groups of guide slide blocks, the outer side of the clamping base is provided with two groups of guide slide grooves, the inside of the electromagnetic seat is provided with an electromagnetic core, one end of the electromagnetic core is provided with an electromagnet, and the outer side of the electromagnetic core is wound with an electromagnetic wire.

[0015] The output docking mechanism also includes a fixed sleeve column arranged on one side of the two groups of base side panels, one side of the fixed sleeve column is movably connected with a movable column, the tail end of the movable column is fixedly connected to the electromagnetic seat, the interior of the fixed sleeve column is fixedly connected with a power conductive block, one side of the power conductive block is installed with a power input line, one end of the movable column is fixedly connected with an electromagnetic conductive block, the outer side of the electromagnetic conductive block is connected to the telescopic electromagnetic input end of the electromagnetic wire, and the other end of the electromagnetic wire is an electromagnetic output end.

[0016] The steering simulation mechanism also includes two groups of mounting bolts arranged on one side of the mounting plate, a coupling is arranged at the bottom end of the output shaft of the simulation motor, an inner adjusting gear ring is arranged inside the input chuck, a plurality of groups of movable claws are arranged on one side of the input chuck, two groups of adjusting gear columns are connected through the outer side of the input chuck, a cross adjusting groove is opened on one side of the input chuck, and a chuck rotating shaft is arranged on the top of the input chuck.

[0017] The beneficial effects of the present invention are:

[0018] (1) The present invention is fixedly arranged by the test adapter component of the bushing rod, the output rod, the test wheel, the coupling, the outer tie rod and the output cross universal joint assembly. During the test process, it is only necessary to install and test the steering column end of the system. The EPS system mainly focuses on the testing of the steering torque sensor, the control unit and the motor. Therefore, the whole system can be divided into two parts for separate testing, thereby greatly improving the test installation and docking efficiency.

[0019] (2) The present invention drives the driving screw to rotate on multiple sets of screw bearing seats through a driving motor, and the screw nut in the screw slider on the lifting slider is threadedly connected to the driving screw, and is guided by the lifting rail to achieve lifting and lowering when the driving screw rotates forward and reversely. In this way, the pressure output plate can be controlled to rise and fall along the lifting groove, and the steering column can be fixed as a whole through the contact between the pressure output plate and the assembly on the steering column, thereby greatly reducing the installation steps of the mechanism to be tested.

[0020] (3) The present invention uses the rebound force of multiple groups of compression spring sleeves on the two groups of docking slides to push the two groups of docking slides to initially clamp the steering output end. When the two groups of docking slides retract, the movable column drives the electromagnetic conductive block to move and contact the power conductive block in the fixed sleeve column, so that the power input line is connected to the telescopic electromagnetic input end. The current passing through the electromagnetic wire will form a magnetic field and give magnetic force to the electromagnet. The steering output end is adsorbed and fixed by the magnetic force, thereby realizing rapid docking of the steering output end of the steering column and eliminating the connection step of the cross universal joint.

[0021] (4) The present invention drives the inner adjusting gear ring to rotate by adjusting the gear column on the input chuck, and the tooth grooves on multiple groups of movable claws are engaged with the inner adjusting gear ring, thereby driving the multiple groups of movable claws to approach the center hole along the cross adjustment groove and clamp and fix the steering input end of the steering column, thereby realizing rapid docking of the steering input end of the steering column and eliminating the step of connecting the steering wheel.

[0022] (5) The present invention simulates a driver turning a steering wheel by driving through a simulated motor. This method can determine the steering angle by monitoring the motor, thereby greatly improving the accuracy of the test.

[0023] (6) The present invention drives two sets of traction wheels to rotate on multiple sets of traction bearings through a traction motor, and drives the test wheels to rotate through the friction between the two sets of traction wheels and the two sets of test wheels, thereby simulating the driving state of the automobile. During rotation, the speed of the traction shaft can be monitored by a speed sensor, thereby ensuring the accuracy of the test result.

[0024] In summary, the present invention has the advantages of high efficiency and high precision. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 It is a schematic diagram of the explosion structure of the present invention;

[0027] Figure 3 It is a schematic diagram of the overall structure of the traction mechanism of the present invention;

[0028] Figure 4 It is a schematic diagram of the disassembled structure of the traction mechanism of the present invention;

[0029] Figure 5 It is a schematic diagram of the structure to be tested of the present invention;

[0030] Figure 6 This is a schematic diagram of the structure of the test unit of the present invention;

[0031] Figure 7 It is a schematic diagram of the overall structure of the testing mechanism of the present invention;

[0032] Figure 8 It is a schematic diagram of the local structure of the testing mechanism of the present invention;

[0033] Fig. 9 It is a schematic diagram of the overall structure of the positioning mechanism of the present invention;

[0034] Fig.10 It is a schematic diagram of the local structure of the positioning mechanism of the present invention;

[0035] Fig.11 This is a schematic diagram of the overall structure of the output docking mechanism of the present invention;

[0036] Fig.12 This is a schematic diagram of the explosion structure of the output docking mechanism of the present invention;

[0037] Fig.13 This is a schematic diagram of the explosion structure of the electromagnetic component of the present invention;

[0038] Fig.14 This is a schematic diagram of the internal structure of the electromagnetic component of the present invention;

[0039] Fig.15 It is a schematic diagram of the overall structure of the steering simulation mechanism of the present invention;

[0040] Fig.16 It is a schematic diagram of the explosion structure of the steering simulation mechanism of the present invention.

[0041] The accompanying drawings of the present application are marked as follows: 1. structural frame; 2. test frame; 3. traction mechanism; 301. traction frame; 302. traction shaft; 303. traction bearing; 304. traction motor; 305. reducer; 306. traction universal joint; 307. traction wheel; 308. speed sensor; 4. structure to be tested; 401. steering column; 402. steering input end; 403. assembly part; 404. control unit; 405. power motor; 406. steering output end; 5. test mechanism; 501. support frame; 502, suspension frame; 503, load-bearing vertical plate; 504, bushing rod; 505, output rod; 506, test wheel; 507, coupling; 508, outer pull rod; 509, suspension shaft; 510, suspension spring; 511, angle sensor; 512, output cross universal shaft assembly; 513, output torque sensor; 6, positioning mechanism; 601, L-shaped support plate; 602, positioning seat; 603, U-shaped positioning plate; 604, outer extension plate; 605, positioning rod; 606, limit side plate; 607, lifting slot; 608, slide rail bottom plate; 609, drive motor; 610, drive screw; 611, screw bearing seat; 612, lifting slide rail; 613, lifting slider; 614, screw slider; 615, screw nut; 616, pressure output plate; 7, output docking mechanism; 701, clamping base; 702, base side plate; 703, docking slide plate; 704, compression spring sleeve rod; 705, guide slider; 706, guide slide groove; 707, electromagnetic seat; 708, electromagnetic core; 709, electromagnet; 710, electromagnetic wire ;711, fixed sleeve column;712, movable column;713, power conductive block;714, power input line;715, electromagnetic conductive block;716, telescopic electromagnetic input terminal;717, electromagnetic output terminal;8, steering simulation mechanism;801, supporting base plate;802, mounting plate;803, mounting bolts;804, simulation motor;805, coupling;806, input chuck;807, inner adjustment gear ring;808, movable claw;809, adjustment gear column;810, cross adjustment slot;811, chuck shaft. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0044] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0045] Example: Figure 1-Figure 16As shown, the present embodiment provides a new energy vehicle electronic power steering system test line, including a structural frame 1, and also including a test frame 2 on the top of the structural frame 1, a traction mechanism 3 is arranged on the top of the structural frame 1, a structure to be tested 4 is arranged on one side of the test frame 2, a test mechanism 5 is arranged on the top of the test frame 2, a positioning mechanism 6 is arranged on the top of the test frame 2, an output docking mechanism 7 is arranged on the top of the test frame 2, and a steering simulation mechanism 8 is arranged on the top of the test frame 2; the test mechanism 5 includes two groups of support frames 501 arranged on the top of the test frame 2, the tops of the two groups of support frames 501 are both installed with suspension frames 502, two groups of load-bearing vertical plates 503 are installed on the top of the cross bar of the test frame 2, a bushing rod 504 is installed on one side of the two groups of load-bearing vertical plates 503, an output rod 505 is arranged inside the bushing rod 504, a test wheel 506 is suspended at the bottom of the suspension frame 502, a coupling 507 is arranged on the inner side of the test wheel 506, and a coupling 507 is installed at the bottom of the coupling 507. An output cross universal shaft assembly 512 is arranged on the outer side of the outer pull rod 508 and the bushing rod 504; the positioning mechanism 6 includes an L-shaped support plate 601 arranged on one side of the test frame 2, the top of the L-shaped support plate 601 is fixedly connected with a positioning seat 602, and the top of the positioning seat 602 is fixedly connected with a U-shaped positioning plate 603; the output docking mechanism 7 includes a clamping base 701 arranged on the top of a group of universal shaft sleeves of the output cross universal shaft assembly 512, the outer side of the clamping base 701 is fixedly connected with two groups of base side plates 702, the top of the clamping base 701 is movably connected with two groups of docking slides 703, and an electromagnetic seat 707 is installed on one side of the docking slide 703; the steering simulation mechanism 8 includes a supporting base plate 801 arranged on one side of the L-shaped support plate 601, a mounting plate 802 is arranged on one side of the supporting base plate 801, a simulation motor 804 is installed on the top of the mounting plate 802, and an input chuck 806 is arranged at the bottom end of the output shaft of the simulation motor 804.

[0046] Among them, the structural frame 1 and the test frame 2 provide support for the device as a whole; the two groups of support frames 501, the suspension frame 502 and the two groups of load-bearing vertical plates 503 provide suspension support for the bushing rod 504 and the test wheel 506, the bushing rod 504 is provided with a gear structure, and its gear is engaged with the output rod 505, so that the power generated by the steering assist is driven to turn the test wheel 506 through the outer tie rod 508, wherein the bushing rod 504, the output rod 505, the test wheel 506, the coupling 507, the outer tie rod 508 and the output cross universal shaft assembly 512 are fixedly set test adapter components, so during the test process, it is only necessary to install and test the steering column 401 end in the system, and the EPS system is mainly for the testing of the steering torque sensor, the control unit 404 and the motor. Therefore, the entire system can be divided into two parts for separate testing, and the installation of the structure to be tested 4 in the EPS system is mainly performed by quickly pressing and positioning the steering column 401 end as a whole through two sets of screw-driven lifting assemblies on the outer side of the U-shaped positioning plate 603 on the positioning seat 602, and the steering output end 406 of the steering column 401 is quickly docked through the electromagnetic structure on the two sets of docking slides 703 in the clamping base 701, thereby eliminating the step of connecting the cross universal joint, and the steering input end 402 of the steering column 401 is quickly docked through the input chuck 806 on the mounting plate 802, thereby eliminating the step of connecting the steering wheel, and driven by the simulation motor 804 to simulate the driver turning the steering wheel. The above-mentioned several quick docking methods greatly improve the testing efficiency of the device.

[0047] The traction mechanism 3 includes a traction frame 301 arranged on one side of the structural frame 1, a traction shaft 302 is arranged on the top of the structural frame 1, a plurality of traction bearings 303 are installed on the top of the structural frame 1, a traction motor 304 is installed on the top of the traction frame 301, a reducer 305 is arranged on one side of the traction motor 304, a traction universal joint 306 is arranged at one end of the output shaft of the traction motor 304 and the reducer 305, two sets of traction wheels 307 are arranged on the outer side of the traction shaft 302, and a speed sensor 308 is installed at one end of the traction shaft 302.

[0048] Among them, the traction frame 301 provides support for the upper structure, and its top traction shaft 302 is supported by multiple sets of traction bearings 303, and is driven by a traction motor 304 to drive two sets of traction wheels 307 to rotate. The two sets of traction wheels 307 are in contact with the test wheel 506 to drive the test wheel 506 to rotate through friction, thereby simulating the driving state of the car; wherein the speed sensor 308 is a magnetoelectric induction sensor, which works on the principle of electromagnetic induction. When the traction shaft 302 rotates, it will cut the magnetic lines of force, resulting in a periodic voltage in the sensor coil, and the magnitude of the voltage is proportional to the speed, thereby accurately capturing the motion state of the traction shaft 302.

[0049] The structure to be tested 4 includes a steering column 401 arranged on the top of the test frame 2, a steering input end 402 is provided at one end of the steering column 401, an assembly part 403 is provided on the outside of the steering column 401, a control unit 404 is provided at one end of the steering column 401, a power assist motor 405 is installed on one side of the control unit 404, and a steering output end 406 is provided at the other end of the steering column 401.

[0050] Among them, the steering column 401 is the main driving shaft of the system, its steering input end 402 is the steering wheel connection end, and its steering output end 406 is the cross universal joint connection end, which is installed through the assembly 403; the control unit 404 includes a torque sensor, an angle sensor, a vehicle speed sensor and an electronic control element. When the steering wheel is turned, the torque sensor detects the steering torque and steering angle, and transmits these signals to the electronic control element. The vehicle speed sensor detects the speed information of the vehicle. The electronic control element calculates the required power assist size and direction based on the signals of the torque sensor and the vehicle speed sensor, and controls the power assist motor 405 to provide corresponding power assist. The power assist motor 405 transmits power to the steering system through the reduction transmission mechanism, thereby realizing power steering.

[0051] The testing mechanism 5 further comprises a suspension shaft 509 arranged at the top of the coupling 507 , a suspension spring 510 is arranged on the outer side of the top end of the suspension shaft 509 , and an angle sensor 511 is installed on the top of the suspension shaft 509 .

[0052] Among them, the suspension shaft 509 is the suspension support structure of the test wheel 506, and its outer suspension spring 510 can reduce the shock of the wheel; the angle sensor 511 is a rotary transformer, which outputs an electrical signal related to the angle through electromagnetic coupling between the primary winding and the two secondary windings.

[0053] The testing mechanism 5 also includes an output torque sensor 513 disposed on the outer side of the bottom end rotating shaft of the output cross universal shaft assembly 512 .

[0054] Among them, in the output torque sensor 513, the strain gauge is pasted on the elastic element. When the elastic element is subjected to torque, it will deform. The strain gauge acts as a resistance strain gauge, and its resistance value will change with the deformation. These resistance changes are converted into electrical signals through the measuring circuit, and finally the electrical signal reflecting the torque size is output.

[0055] The positioning mechanism 6 also includes two groups of outer extension plates 604 arranged on the outside of the U-shaped positioning plate 603, and the tops of the two groups of outer extension plates 604 are provided with positioning rods 605. The outsides of the two groups of outer extension plates 604 are provided with limiting side plates 606, and one side of the limiting side plate 606 is provided with a lifting groove 607.

[0056] The top positioning rods 605 of the two groups of outer extension plates 604 can be docked with the top positioning holes of the mounting parts 403 on the steering column 401, so as to achieve preliminary docking and limiting of the steering column 401 as a whole.

[0057] The positioning mechanism 6 also includes a slide rail base plate 608 arranged on one side of the limiting side plate 606, a driving motor 609 is installed on one side of the slide rail base plate 608, the bottom end of the output shaft of the driving motor 609 is connected to a driving screw 610, and a plurality of screw bearing seats 611 are arranged on the outer side of the driving screw 610, a lifting slide rail 612 is fixedly connected to one side of the slide rail base plate 608, a lifting slider 613 is movably connected to one side of the lifting slide rail 612, a screw slider 614 is installed on one side of the lifting slider 613, a screw nut 615 is installed inside the screw slider 614, and a pressure output plate 616 is fixedly connected to one side of the screw slider 614.

[0058] Among them, when the driving motor 609 is energized, it can drive the driving screw 610 to rotate on the multiple sets of screw bearing seats 611 through the output shaft. The screw nut 615 in the screw slider 614 on the lifting slider 613 is threadedly connected to the driving screw 610, and is guided by the lifting rail 612 to achieve lifting and lowering when the driving screw 610 rotates forward and reversely. In this way, the pressure output plate 616 can be controlled to rise and fall along the lifting groove 607, and the steering column 401 as a whole can be further fixed through the contact between the pressure output plate 616 and the assembly 403 on the steering column 401.

[0059] The output docking mechanism 7 also includes a plurality of groups of compression spring sleeve rods 704 arranged on one side of the two groups of docking slides 703, two groups of guide slide blocks 705 are fixedly connected to the outer sides of the two groups of docking slides 703, two groups of guide slide grooves 706 are opened on the outer side of the clamping base 701, an electromagnetic core 708 is arranged inside the electromagnetic seat 707, an electromagnet 709 is arranged at one end of the electromagnetic core 708, and an electromagnetic wire 710 is wound around the outer side of the electromagnetic core 708.

[0060] Among them, the rebound force of the compression springs in the multiple groups of compression spring sleeves 704 can be applied to the two groups of docking slides 703 arranged opposite to each other, so that the steering output end 406 of the steering column 401 can be initially clamped and fixed in this way, and the electromagnet 709 can be driven to contact the steering output end 406.

[0061] The output docking mechanism 7 also includes a fixed sleeve column 711 arranged on one side of the two groups of base side plates 702, one side of the fixed sleeve column 711 is movably connected with a movable column 712, the tail end of the movable column 712 is fixedly connected to the electromagnetic seat 707, the interior of the fixed sleeve column 711 is fixedly connected with a power conductive block 713, one side of the power conductive block 713 is installed with a power input line 714, one end of the movable column 712 is fixedly connected with an electromagnetic conductive block 715, the outer side of the electromagnetic conductive block 715 is connected with a telescopic electromagnetic input end 716 of the electromagnetic wire 710, and the other end of the electromagnetic wire 710 is an electromagnetic output end 717.

[0062] Among them, the movable column 712 is movably connected with the fixed sleeve column 711. When the two groups of docking slides 703 are retracted away, the electromagnetic conductive block 715 can be driven by the movable column 712 to move and contact the power conductive block 713 in the fixed sleeve column 711, so that the power input line 714 is connected to the telescopic electromagnetic input end 716. The current passing through the electromagnetic wire 710 will form a magnetic field and give magnetic force to the electromagnet 709, and the steering output end 406 is adsorbed and fixed by the magnetic force. When the two groups of docking slides 703 are placed close to each other, the two groups of conductive blocks are separated, so that the electromagnetic structure cannot be energized.

[0063] The steering simulation mechanism 8 also includes two groups of mounting bolts 803 arranged on one side of the mounting plate 802, a coupling 805 is arranged at the bottom end of the output shaft of the simulation motor 804, an inner adjusting gear ring 807 is arranged inside the input chuck 806, a plurality of groups of movable claws 808 are arranged on one side of the input chuck 806, two groups of adjusting gear columns 809 are connected through the outer side of the input chuck 806, a cross adjusting groove 810 is opened on one side of the input chuck 806, and a chuck rotating shaft 811 is arranged on the top of the input chuck 806.

[0064] Among them, two groups of mounting bolts 803 can be threadedly connected with the threaded holes on the supporting base plate 801, so as to realize the installation of the mounting plate 802, and provide support for the motor structure through the mounting plate 802; wherein the multiple groups of movable claws 808 on the input chuck 806 are transmitted to move along the cross adjustment groove 810 through the engagement of two groups of adjustment gear columns 809 with the tooth marks on the inner adjustment gear ring 807, so as to realize rapid docking with the steering input end 402 of the steering column 401; wherein the chuck shaft 811 is connected with the output shaft of the simulation motor 804 through the coupling 805, so that the driver's steering can be simulated by the simulation motor 804. This method has higher accuracy and the rotation angle can be known by monitoring the motor.

[0065] Working principle:

[0066] Before testing, the user aligns the assembly 403 on the pre-assembled steering column 401 with the positioning rod 605 on the outer extension plate 604 outside the U-shaped positioning plate 603 for preliminary placement and positioning, and then inserts the steering output end 406 of the steering column 401 between the two sets of docking slides 703, and the multiple sets of compression spring sleeve rods 704 on the outside retract and generate a rebound force to push the two sets of docking slides 703 to preliminarily clamp the steering output end 406. When the two sets of docking slides 703 retract, the electromagnetic conductive block 715 is driven to move through the movable column 712 and contact with the power conductive block 713 in the fixed sleeve column 711, so that the power input line 714 is connected to the telescopic electromagnetic input end 716, and the current passing through the electromagnetic wire 710 will form a magnetic field and give magnetic force to the electromagnet 709, and the steering output end 406 is adsorbed and fixed by the magnetic force;

[0067] Then, the steering input end 402 of the steering column 401 is aligned with the center hole of the input chuck 806, and then the inner adjusting gear ring 807 is driven to rotate by rotating the adjusting gear column 809 through a tool, and the tooth grooves on the multiple groups of movable claws 808 are engaged with the inner adjusting gear ring 807, thereby driving the multiple groups of movable claws 808 to approach the center hole along the cross adjusting groove 810 and clamp and fix the steering input end 402 of the steering column 401;

[0068] Finally, the driving motor 609 is powered on. When the driving motor 609 is powered on and started, the driving screw 610 is driven to rotate on the multiple screw bearing seats 611 through the output shaft. The screw nut 615 in the screw slider 614 on the lifting slider 613 is threadedly connected with the driving screw 610, and is guided by the lifting rail 612 to achieve lifting when the driving screw 610 rotates forward and reversely. In this way, the pressure output plate 616 can be controlled to rise and fall along the lifting groove 607, and the steering column 401 is fixed as a whole through the contact between the pressure output plate 616 and the assembly 403 on the steering column 401.

[0069] During the test, the user powers on the traction motor 304. When the traction motor 304 is powered on and started, the two sets of traction wheels 307 are driven to rotate on the multiple sets of traction bearings 303 through the traction shaft 302, and the test wheels 506 are driven to rotate through the friction between the two sets of traction wheels 307 and the two sets of test wheels 506, thereby simulating the driving state of the car. During the rotation, the speed sensor 308 can monitor the speed of the traction shaft 302;

[0070] When steering, the user energizes the simulation motor 804. When the simulation motor 804 is energized and started, it will drive the steering column 401 to rotate through the output shaft and the input chuck 806. When rotating, the torque sensor in the control unit 404 detects the steering torque and steering angle, and transmits these signals to the electronic control element. The vehicle speed sensor detects the speed information of the vehicle. The electronic control element calculates the required power assistance size and direction based on the signals of the torque sensor and the vehicle speed sensor, and controls the power-assisting motor 405 to provide corresponding power assistance. The power-assisting motor 405 transmits power to the steering system, i.e., the transmission component in the test mechanism 5, through the reduction transmission mechanism to drive the two sets of test wheels 506 to steer, thereby realizing the power steering test.

[0071] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A new energy vehicle electronic power steering system test line, comprising a structural frame (1), characterized in that: It also comprises a test frame (2) on the top of the structural frame (1), a traction mechanism (3) is arranged on the top of the structural frame (1), a structure to be tested (4) is arranged on one side of the test frame (2), a test mechanism (5) is arranged on the top of the test frame (2), a positioning mechanism (6) is arranged on the top of the test frame (2), an output docking mechanism (7) is arranged on the top of the test frame (2), and a steering simulation mechanism (8) is arranged on the top of the test frame (2); The test mechanism (5) comprises two groups of support frames (501) arranged on the top of the test frame (2), the tops of the two groups of support frames (501) are both installed with suspension frames (502), the tops of the cross bars of the test frame (2) are installed with two groups of load-bearing vertical plates (503), one side of the two groups of load-bearing vertical plates (503) is installed with a bushing rod (504), the inside of the bushing rod (504) is provided with an output rod (505), a test wheel (506) is suspended at the bottom of the suspension frame (502), a coupling (507) is provided on the inner side of the test wheel (506), an outer pull rod (508) is installed on the bottom of the coupling (507), and an output cross universal shaft assembly (512) is provided on the outer side of the bushing rod (504); The positioning mechanism (6) comprises an L-shaped support plate (601) arranged on one side of the test frame (2), the top of the L-shaped support plate (601) is fixedly connected to a positioning seat (602), and the top of the positioning seat (602) is fixedly connected to a U-shaped positioning plate (603).

2. The new energy vehicle electronic power steering system test line according to claim 1, characterized in that: The output docking mechanism (7) comprises a clamping base (701) arranged at the top end of a set of universal shaft sleeves of the output cross universal shaft assembly (512), two sets of base side plates (702) are fixedly connected to the outer side of the clamping base (701), two sets of docking slide plates (703) are movably connected to the top of the clamping base (701), and an electromagnetic seat (707) is installed on one side of the docking slide plate (703); The steering simulation mechanism (8) comprises a support base plate (801) arranged on one side of the L-shaped support plate (601), a mounting plate (802) is arranged on one side of the support base plate (801), a simulation motor (804) is installed on the top of the mounting plate (802), and an input chuck (806) is arranged at the bottom end of the output shaft of the simulation motor (804).

3. The new energy vehicle electronic power steering system test line according to claim 2, characterized in that: The traction mechanism (3) comprises a traction frame (301) arranged on one side of the structural frame (1); a traction shaft (302) is arranged on the top of the structural frame (1); a plurality of traction bearings (303) are installed on the top of the structural frame (1); a traction motor (304) is installed on the top of the traction frame (301); a reducer (305) is arranged on one side of the traction motor (304); a traction universal joint (306) is arranged at one end of the output shaft of the traction motor (304) and the reducer (305); two groups of traction wheels (307) are arranged on the outer side of the traction shaft (302); and a speed sensor (308) is installed at one end of the traction shaft (302).

4. The new energy vehicle electronic power steering system test line according to claim 3, characterized in that: The structure to be tested (4) comprises a steering column (401) arranged on the top of the test frame (2), one end of the steering column (401) is provided with a steering input end (402), the outer side of the steering column (401) is provided with an assembly part (403), one end of the steering column (401) is provided with a control unit (404), one side of the control unit (404) is installed with a power assist motor (405), and the other end of the steering column (401) is provided with a steering output end (406).

5. The new energy vehicle electronic power steering system test line according to claim 4, characterized in that: The testing mechanism (5) further comprises a suspension shaft (509) arranged at the top of the coupling (507), a suspension spring (510) being arranged on the outer side of the top end of the suspension shaft (509), and an angle sensor (511) being installed on the top of the suspension shaft (509); the testing mechanism (5) further comprises an output torque sensor (513) being arranged on the outer side of the rotating shaft at the bottom end of the output cross universal shaft assembly (512).

6. The new energy vehicle electronic power steering system test line according to claim 5, characterized in that: The positioning mechanism (6) further comprises two groups of outer extension plates (604) arranged outside the U-shaped positioning plate (603), the tops of the two groups of outer extension plates (604) are both provided with positioning rods (605), the outer sides of the two groups of outer extension plates (604) are both provided with limiting side plates (606), and one side of the limiting side plates (606) is provided with a lifting groove (607).

7. The new energy vehicle electronic power steering system test line according to claim 6, characterized in that: The positioning mechanism (6) also includes a slide rail base plate (608) arranged on one side of the limiting side plate (606), a driving motor (609) is installed on one side of the slide rail base plate (608), the bottom end of the output shaft of the driving motor (609) is connected to a driving screw (610), and multiple groups of screw bearing seats (611) are arranged on the outer side of the driving screw (610), a lifting slide rail (612) is fixedly connected to one side of the slide rail base plate (608), a lifting slider (613) is movably connected to one side of the lifting slide rail (612), a screw slider (614) is installed on one side of the lifting slider (613), a screw nut (615) is installed inside the screw slider (614), and a pressure output plate (616) is fixedly connected to one side of the screw slider (614).

8. The new energy vehicle electronic power steering system test line according to claim 7, characterized in that: The output docking mechanism (7) further comprises a plurality of groups of compression spring sleeve rods (704) arranged on one side of the two groups of docking slide plates (703); the outer sides of the two groups of docking slide plates (703) are fixedly connected with two groups of guide slide blocks (705); the outer side of the clamping base (701) is provided with two groups of guide slide grooves (706); an electromagnetic core (708) is arranged inside the electromagnetic seat (707); an electromagnet (709) is arranged at one end of the electromagnetic core (708); and an electromagnetic wire (710) is wound around the outer side of the electromagnetic core (708).

9. The new energy vehicle electronic power steering system test line according to claim 8, characterized in that: The output docking mechanism (7) further comprises a fixed sleeve column (711) provided on one side of the two groups of base side plates (702); one side of the fixed sleeve column (711) is movably connected to a movable column (712); the tail end of the movable column (712) is fixedly connected to the electromagnetic seat (707); the interior of the fixed sleeve column (711) is fixedly connected to a power conductive block (713); one side of the power conductive block (713) is installed with a power input line (714); one end of the movable column (712) is fixedly connected to an electromagnetic conductive block (715); the outer side of the electromagnetic conductive block (715) is connected to a telescopic electromagnetic input end (716) of the electromagnetic wire (710); the other end of the electromagnetic wire (710) is an electromagnetic output end (717).

10. The new energy vehicle electronic power steering system test line according to claim 9, characterized in that: The steering simulation mechanism (8) further comprises two groups of mounting bolts (803) arranged on one side of the mounting plate (802); a coupling (805) is arranged at the bottom end of the output shaft of the simulation motor (804); an inner adjusting tooth ring (807) is arranged inside the input chuck (806); a plurality of groups of movable claws (808) are arranged on one side of the input chuck (806); two groups of adjusting tooth columns (809) are connected through the outer side of the input chuck (806); a cross adjusting groove (810) is opened on one side of the input chuck (806); and a chuck rotating shaft (811) is arranged on the top of the input chuck (806).

Images