New Energy Vehicle Electronic Power Steering System Test Line

Abstract

The present invention provides a test line for an electronic power steering system of a new energy vehicle, comprising a structural frame and a test frame on the top of the structural frame, wherein a traction mechanism is provided on the top of the structural frame, a structure to be tested is provided on one side of the test frame, a test mechanism is provided on the top of the test frame, a positioning mechanism is provided on the top of the test frame, an output docking mechanism is provided on the top of the test frame, and a steering simulation mechanism is provided on the top of the test frame. The present invention uses a fixed test adapter component, and during the test process, only the steering torque sensor, the control unit, and the motor at the steering column end of the system need to be tested, and multiple quick docking installation methods are used to ensure the test effect while greatly improving the test efficiency.

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] An electric power steering system (EPS) is a power steering system that relies directly on an electric motor to provide assist torque. Compared to traditional hydraulic power steering (HPS), EPS systems offer many advantages. EPS primarily consists of a torque sensor, vehicle speed sensor, electric motor, reduction mechanism, and control unit.

[0003] Chinese patent CN201310219261.8 discloses a test device and method for automotive electronic power steering systems. The device comprises a base with a horizontal upper surface. Mounted on the upper surface, from left to right, are: a limiter platform I, an elastic component I, a first guide rod, a rack-and-pinion steering gear I, a pull-pressure sensor I, a rack-and-pinion steering gear II, a pull-pressure sensor II, a second guide rod, an elastic component II, and a limiter platform II. The device can measure the EPS's power-assistance characteristics at various steering 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 required for preparation. Summary of the Invention

[0005] The purpose of the present invention is to address the shortcomings of the existing technology and provide a test line for the electronic power steering system of new energy vehicles. The test mechanism cooperates with the positioning docking mechanism to achieve a quick docking and installation function, thereby solving the problem of low applicability.

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

[0007] The test line of the electronic power steering system of new energy vehicles includes a structural frame and a test frame on the top of the structural frame, the top of the structural frame is provided with a traction mechanism, the side of the test frame is provided with a structure to be tested, the top of the test frame is provided with a test mechanism, 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; the test mechanism includes two groups of support frames provided on the top of the test frame, the tops of the two groups of support frames are both installed with suspension frames, two groups of load-bearing vertical plates are installed on the top of the cross bar of the test frame, one side of the two groups of load-bearing vertical plates is installed with a bushing rod, the interior of the bushing rod is provided with an output rod, a test wheel is suspended at the bottom of the suspension frame, the inner side of the test wheel is provided with a coupling, and the coupling An external pull rod is installed at the bottom, and an output cross universal joint assembly is provided on the outside of the bushing rod; the positioning mechanism includes an L-shaped support plate provided on one side of the test frame, 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 provided on the top of a group of universal joint sleeves of the output cross universal joint assembly, two groups of base side plates are fixedly connected to the outside 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 base provided on one side of the L-shaped support plate, a mounting plate is provided on one side of the supporting base, a simulation motor is installed on the top of the mounting plate, and an input chuck is provided 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 provided 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 provided on one side of the traction motor, a traction universal joint is provided at one end of the output shaft of the traction motor and the reducer, two sets of traction wheels are provided on the outside 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 further includes an output torque sensor disposed on the outer side of the bottom end rotating shaft of the output cross universal joint 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, and 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 drive motor is installed on one side of the slide rail base plate, the bottom end of the drive motor output shaft is connected to a drive screw, and multiple groups of screw bearing seats are provided on the outside of the drive screw, a lifting slide rail is fixedly connected to one side of the slide rail, 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, two groups of guide sliders are fixedly connected to the outer sides of the two groups of docking slides, two groups of guide slots are opened on the outer side of the clamping base, an electromagnetic core is provided inside the electromagnetic seat, an electromagnet is provided at one end of the electromagnetic core, and an electromagnetic wire is wound around the outer side of the electromagnetic core.

[0015] The output docking mechanism also includes a fixed sleeve column provided on one side of the two groups of base side panels, one side of the fixed sleeve column is movably connected to a movable column, the tail end of the movable column is fixedly connected to the electromagnetic base, the interior of the fixed sleeve column is fixedly connected to 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 to the 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 the 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 provided at the bottom end of the output shaft of the simulation motor, an inner adjustment gear ring is provided inside the input chuck, a plurality of groups of movable claws are provided on one side of the input chuck, two groups of adjustment gear columns are connected through the outer side of the input chuck, a cross adjustment slot is provided on one side of the input chuck, and a chuck rotating shaft is provided 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, output rod, test wheel, coupling, outer pull rod and output cross universal joint assembly. During the test process, it is only necessary to install and test the steering column end in the system. The EPS system mainly focuses on the testing of the steering torque sensor, control unit and motor. Therefore, the entire 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 reverse. In this way, the pressure output plate can be controlled to rise and fall along the lifting groove, and the steering column as a whole is fixed by 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 preliminarily 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, 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 the multiple sets of movable claws are engaged with the inner adjusting gear ring, thereby driving the multiple sets 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 the 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 a car. During rotation, the speed of the traction shaft can be monitored by a speed sensor, thereby ensuring the accuracy of the test results.

[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 This 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 This is a schematic diagram of the disassembled structure of the traction mechanism of the present invention;

[0029] Figure 5 Schematic diagram of the structure to be tested of the present invention;

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

[0031] Figure 7 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] Figure 9 This is a schematic diagram of the overall structure of the positioning mechanism of the present invention;

[0034] Figure 10 This is a schematic diagram of the partial structure of the positioning mechanism of the present invention;

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

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

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

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

[0039] Figure 15 This is a schematic diagram of the overall structure of the steering simulation mechanism of the present invention;

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

[0041] The accompanying drawings of this application are numeraled 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-assist motor; 406. steering output end; 5. test mechanism; 501. support frame; 502, suspension bracket; 503, load-bearing vertical plate; 504, bushing rod; 505, output rod; 506, test wheel; 507, coupling; 508, outer tie rod; 509, suspension shaft; 510, suspension spring; 511, angle sensor; 512, output cross universal joint 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 base; 609, drive motor; 610, drive screw; 611, screw bearing seat; 612, lift rail; 613, lift 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; 704, compression spring sleeve; 705, guide slider; 706, guide chute; 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. Support base plate; 802. Mounting plate; 803. Mounting bolt; 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 clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall 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 to 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, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0044] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0045] Example: Figures 1-16As shown, this 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 provided on the top of the structural frame 1, a structure to be tested 4 is provided on one side of the test frame 2, a test mechanism 5 is provided on the top of the test frame 2, a positioning mechanism 6 is provided on the top of the test frame 2, an output docking mechanism 7 is provided on the top of the test frame 2, and a steering simulation mechanism 8 is provided on the top of the test frame 2; the test mechanism 5 includes two groups of support frames 501 provided on the top of the test frame 2, and 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 provided inside the bushing rod 504, 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, and a coupling 507 is installed at the bottom of the coupling 507. An output cross universal joint assembly 512 is provided 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 provided on one side of the test frame 2, and 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; the output docking mechanism 7 includes a clamping base 701 provided on the top of a group of universal joint sleeves of the output cross universal joint assembly 512, and the outer side of the clamping base 701 is fixedly connected to two groups of base side plates 702, and the top of the clamping base 701 is movably connected to 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 provided on one side of the L-shaped support plate 601, and a mounting plate 802 is provided on one side of the supporting base plate 801, and a simulation motor 804 is installed on the top of the mounting plate 802, and an input chuck 806 is provided 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 entire device; 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, and 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 by the outer pull rod 508 to drive the test wheel 506 to steer, including the bushing rod 504, the output rod 505, the test wheel 506, the coupling 507, the outer pull rod 508 and the output cross universal joint assembly 512 as a fixed test adapter component, 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 mainly focuses on 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 achieved by quickly pressing and positioning the steering column 401 end as a whole through two sets of screw-driven lifting components on the outer side of the U-shaped positioning plate 603 on the positioning seat 602, and quickly docking the steering output end 406 of the steering column 401 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 quickly docking the steering input end 402 of the steering column 401 through the input chuck 806 on the mounting plate 802, thereby eliminating the step of connecting the steering wheel, and driving through 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 provided on the top of the structural frame 1, and multiple sets 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, and a reducer 305 is provided on one side of the traction motor 304. One end of the output shaft of the traction motor 304 and the reducer 305 is provided with a traction universal joint 306, two sets of traction wheels 307 are provided on the outside of the traction shaft 302, and a speed sensor 308 is installed on 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 the 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 and drive the test wheel 506 to rotate through friction, thereby simulating the driving state of the car; the speed sensor 308 is a magnetoelectric induction sensor, which works based on the principle of electromagnetic induction. When the traction shaft 302 rotates, it cuts the magnetic lines of force, causing a periodic voltage to be generated in the sensor coil. 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 part 403; the control unit 404 contains a torque sensor, an angle sensor, a vehicle speed sensor and an electronic control element. When the steering wheel rotates, 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 vehicle speed information. 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 includes a suspension shaft 509 disposed on the top of the coupling 507 . A suspension spring 510 is disposed on the outer side of the top end of the suspension shaft 509 . 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 rotating transformer, which outputs an electrical signal related to the angle through electromagnetic coupling between the primary winding and two secondary windings.

[0053] The testing mechanism 5 further includes an output torque sensor 513 disposed on the outer side of the bottom end rotating shaft of the output cross universal joint 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. The tops of the two groups of outer extension plates 604 are each provided with a positioning rod 605. The outsides of the two groups of outer extension plates 604 are each provided with a limiting side plate 606. A lifting groove 607 is opened on one side of the limiting side plate 606.

[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 assembly parts 403 on the steering column 401 , thereby achieving 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, and a drive motor 609 is installed on one side of the slide rail base plate 608. The bottom end of the output shaft of the drive motor 609 is connected to a drive screw 610, and multiple groups of screw bearing seats 611 are arranged on the outside of the drive screw 610. One side of the slide rail base plate 608 is fixedly connected to a lifting slide rail 612, and one side of the lifting slide rail 612 is movably connected to a lifting slider 613. One side of the lifting slider 613 is installed with a screw slider 614, and a screw nut 615 is installed inside the screw slider 614. One side of the screw slider 614 is fixedly connected to a pressure output plate 616.

[0058] Among them, when the driving motor 609 is energized, it can drive the driving screw 610 to rotate on 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 slide rail 612 to achieve lifting and lowering when the driving screw 610 rotates forward and reverse. 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 multiple groups of compression spring sleeve rods 704 arranged on one side of the two groups of docking slides 703. Two groups of guide sliders 705 are fixedly connected to the outer sides of the two groups of docking slides 703. Two groups of guide slots 706 are opened on the outer side of the clamping base 701. An electromagnetic core 708 is arranged inside the electromagnetic seat 707, and an electromagnet 709 is arranged at one end of the electromagnetic core 708. 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 provided on one side of the two groups of base side panels 702, and a movable column 712 is movably connected to one side of the fixed sleeve column 711, and the tail end of the movable column 712 is fixedly connected to the electromagnetic base 707. The interior of the fixed sleeve column 711 is fixedly connected to a power conductive block 713, and a power input line 714 is installed on one side of the power conductive block 713. One end of the movable column 712 is fixedly connected to an electromagnetic conductive block 715, and the outer side of the electromagnetic conductive block 715 is connected to 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 to the fixed sleeve column 711. When the two sets of docking slides 703 retract 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 sets of docking slides 703 are placed close to each other, the two sets of conductive blocks are far away, so that the electromagnetic structure cannot be energized.

[0063] The steering simulation mechanism 8 also includes two sets of mounting bolts 803 provided on one side of the mounting plate 802, a coupling 805 is provided at the bottom end of the output shaft of the simulation motor 804, an internal adjustment gear ring 807 is provided inside the input chuck 806, a plurality of sets of movable claws 808 are provided on one side of the input chuck 806, two sets of adjustment gear columns 809 are connected through the outer side of the input chuck 806, a cross adjustment slot 810 is provided on one side of the input chuck 806, and a chuck rotating shaft 811 is provided 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 support base plate 801, thereby realizing the installation of the mounting plate 802, and providing support to the motor structure through the mounting plate 802; wherein the multiple groups of movable claws 808 on the input chuck 806 are driven 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, thereby realizing rapid docking with the steering input end 402 of the steering column 401; wherein the chuck shaft 811 is connected to 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 part 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. Then, the steering output end 406 of the steering column 401 is inserted between the two sets of docking slides 703. The multiple sets of compression spring sleeve rods 704 on the outer side 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 moved by the movable column 712 and contacts the power conductive block 713 in the fixed sleeve 711, thereby connecting the power input line 714 to the telescopic electromagnetic input end 716. The current passing through the electromagnetic wire 710 will form a magnetic field and impart magnetic force to the electromagnet 709, which adsorbs and fixes the steering output end 406 through 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. Then, the adjusting tooth column 809 is rotated by a tool to drive the inner adjusting tooth ring 807 to rotate. The tooth grooves on the multiple sets of movable claws 808 engage with the inner adjusting tooth ring 807, thereby driving the multiple sets of movable claws 808 to approach the center hole along the cross adjustment groove 810 and clamp the steering input end 402 of the steering column 401.

[0068] Finally, the drive motor 609 is energized. When the drive motor 609 is powered on, it drives the drive 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 drive screw 610. Guided by the lifting rail 612, the drive screw 610 is raised and lowered when it rotates forward and reverse. In this way, the pressure output plate 616 can be controlled to rise and fall along the lifting slot 607. 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 energizes the traction motor 304. When the traction motor 304 is powered on, it drives the two sets of traction wheels 307 to rotate on the multiple sets of traction bearings 303 through the traction shaft 302. The friction between the two sets of traction wheels 307 and the two sets of test wheels 506 also drives the test wheels 506 to rotate, thereby simulating the driving state of the car. During the rotation, the speed of the traction shaft 302 can be monitored by the speed sensor 308.

[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. During rotation, the torque sensor in the control unit 404 detects the steering torque and steering angle, and transmits these signals to the electronic control component. The vehicle speed sensor detects the vehicle speed information. The electronic control component 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, 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 scope of protection 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 includes a test frame (2) on the top of the structural frame (1), a traction mechanism (3) is provided on the top of the structural frame (1), a structure to be tested (4) is provided on one side of the test frame (2), a test mechanism (5) is provided on the top of the test frame (2), a positioning mechanism (6) is provided on the top of the test frame (2), an output docking mechanism (7) is provided on the top of the test frame (2), and a steering simulation mechanism (8) is provided on the top of the test frame (2); The traction mechanism (3) comprises a traction frame (301) provided on one side of the structural frame (1); a traction shaft (302) is provided 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 provided on one side of the traction motor (304); a traction universal joint (306) is provided on one end of the output shaft of the traction motor (304) and the reducer (305); two sets of traction wheels (307) are provided on the outside of the traction shaft (302); and a speed sensor (308) is installed on one end of the traction shaft (302); The structure to be tested (4) includes 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), an 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); 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 a suspension frame (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 interior of the bushing rod (504) is provided with an output rod (505), and the bottom of the suspension frame (502) is suspended with a test wheel (503). 06), a coupling (507) is provided on the inner side of the test wheel (506), an outer pull rod (508) is installed at the bottom of the coupling (507), a suspension shaft (509) is provided on the top of the coupling (507), a suspension spring (510) is provided on the outer side of the top end of the suspension shaft (509), an angle sensor (511) is installed on the top of the suspension shaft (509), 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) provided on one side of the test stand (2), the top of the L-shaped support plate (601) being fixedly connected to a positioning seat (602), and the top of the positioning seat (602) being fixedly connected to a U-shaped positioning plate (603); The output docking mechanism (7) includes a clamping base (701) provided 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 slides (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 (703); The steering simulation mechanism (8) comprises a support base plate (801) provided on one side of the L-shaped support plate (601), a mounting plate (802) provided on one side of the support base plate (801), a simulation motor (804) installed on the top of the mounting plate (802), and an input chuck (806) provided at the bottom end of the output shaft of the simulation motor (804).

2. The new energy vehicle electronic power steering system test line according to claim 1, characterized in that: The testing mechanism (5) further comprises an output torque sensor (513) arranged on the outside of the bottom end rotating shaft of the output cross universal shaft assembly (512).

3. The new energy vehicle electronic power steering system test line according to claim 1, 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).

4. The new energy vehicle electronic power steering system test line according to claim 3, characterized in that: The positioning mechanism (6) further includes a slide rail base plate (608) provided on one side of the limiting side plate (606), a driving motor (609) being installed on one side of the slide rail base plate (608), a driving screw (610) being connected to the bottom end of the output shaft of the driving motor (609), a plurality of screw bearing seats (611) being provided on the outer side of the driving screw (610), a lifting slide rail (612) being fixedly connected to one side of the slide rail base plate (608), a lifting slider (613) being movably connected to one side of the lifting slide rail (612), a screw slider (614) being installed on one side of the lifting slider (613), a screw nut (615) being installed inside the screw slider (614), and a pressure output plate (616) being fixedly connected to one side of the screw slider (614).

5. The new energy vehicle electronic power steering system test line according to claim 1, characterized in that: The output docking mechanism (7) further comprises a plurality of groups of compression spring sleeve rods (704) provided on one side of the two groups of docking slides (703); the outer sides of the two groups of docking slides (703) are fixedly connected with two groups of guide slides (705); the outer side of the clamping base (701) is provided with two groups of guide slots (706); an electromagnetic core (708) is provided inside the electromagnetic base (707); an electromagnet (709) is provided at one end of the electromagnetic core (708); and an electromagnetic wire (710) is wound around the outer side of the electromagnetic core (708).

6. The new energy vehicle electronic power steering system test line according to claim 5, 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 base (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); and the other end of the electromagnetic wire (710) is an electromagnetic output end (717).

7. The new energy vehicle electronic power steering system test line according to claim 1, 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 provided at the bottom end of the output shaft of the simulation motor (804); an inner adjusting tooth ring (807) is provided inside the input chuck (806); a plurality of groups of movable claws (808) are provided 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 provided on one side of the input chuck (806); and a chuck rotating shaft (811) is provided on the top of the input chuck (806).

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