CN111060329B - Performance test equipment for electric power steering system - Google Patents
Performance test equipment for electric power steering system Download PDFInfo
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- CN111060329B CN111060329B CN202010000447.4A CN202010000447A CN111060329B CN 111060329 B CN111060329 B CN 111060329B CN 202010000447 A CN202010000447 A CN 202010000447A CN 111060329 B CN111060329 B CN 111060329B
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- 238000011056 performance test Methods 0.000 title claims abstract description 17
- 239000006247 magnetic powder Substances 0.000 claims abstract description 31
- 238000012360 testing method Methods 0.000 claims abstract description 28
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 25
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims 4
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- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
- G01M17/06—Steering behaviour; Rolling behaviour
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Abstract
The performance test equipment of the electric power steering system comprises a stepped underframe, a magnetic powder brake arranged on a first step of the underframe, a test assembly, a control and data acquisition device and an upper computer, wherein the test assembly and the control and data acquisition device are arranged on a second step of the underframe; the test assembly comprises an input torque motor, an input torque motor reducer, a dynamic torque sensor II, a power-assisted motor and a power-assisted motor reducer, and the output end of the test assembly is connected with the magnetic powder brake; the control and data acquisition device comprises an electric control unit ECU of the electric power steering system, a dynamic torque sensor data acquisition module, an input motor control unit and a tension control system, wherein the electric control unit controls the rotation of the input torque motor and can provide various classical waveform torque curves, rotating speed curves and rotating angle curves; the control and data acquisition device is electrically connected with the upper computer; the system has high flexibility and is suitable for testing the performances of various electric power steering systems of vehicles.
Description
Technical Field
The invention relates to the technical field of mechanical simulation, in particular to performance testing equipment for an electric power steering system.
Background
The electric power steering system Electric Power Steering, abbreviated EPS, is a power steering system that directly relies on an electric motor to provide assist torque, and has many advantages over the conventional hydraulic power steering system HPSHydraulic Power Steering. The EPS mainly comprises a torque sensor, a vehicle speed sensor, a motor, a speed reducing mechanism, an electronic control unit ECU and the like.
The test and verification of the EPS system is an indispensable link, and the existing electric power steering system performance test equipment cannot meet the test requirements of electric power steering systems of different styles or types, so that the design of the experiment table with strong universality, reliable structure and simple test is a matter to be solved urgently.
Disclosure of Invention
In order to overcome the problems, the invention provides the performance test equipment of the electric power steering system, which has high system flexibility and is suitable for various vehicles.
The technical scheme adopted by the invention is as follows: the performance test equipment of the electric power steering system comprises a stepped underframe 1, a control and data acquisition device, an upper computer, a magnetic powder brake 6 and a test assembly connected with the magnetic powder brake 6;
The underframe 1 is provided with two stages of steps, the first stage of steps is arranged below the second stage of steps, the first stage of steps is provided with a magnetic powder brake bottom plate 2 for installing a magnetic powder brake 6, the second stage of steps is provided with a bottom plate 39 for installing a test assembly, a control and data acquisition device, and the test assembly, the control and the data acquisition device are all arranged along the length direction of the bottom plate 39;
The test assembly comprises an input torque motor 9, an input torque motor base 8, a dynamic torque sensor II 14, a dynamic torque sensor base II 13, a booster motor 26 and a booster motor base 30; the input torque motor 9 is connected with an input shaft of the input torque motor reducer 10; an input torque motor fixing plate 11 is fixed at the right end of the input torque motor base 8, and the input torque motor fixing plate 11 supports the input torque motor 9 and the input torque motor reducer 10 through bearings; an output shaft of the input torque motor reducer 10 is connected with an input shaft of a dynamic torque sensor II 14 through a coupler II 12; the dynamic torque sensor base II 13 supports a dynamic torque sensor II 14; an output shaft of the dynamic torque sensor II 14 is connected with the right end of a torque input shaft 16 through a coupler III 15, the left end of the torque input shaft 16 is connected with the right end of a replacement shaft 17 through a flange structure, and the left end of the replacement shaft 17 is connected with the right end of a small belt wheel shaft 18 through a flange structure; the bearing seat I19 supports the small pulley shaft 18 through a bearing, and the left end of the small pulley shaft 18 extends out of the underframe 1; the left end of the small pulley shaft 18 is provided with a small pulley 20, the small pulley 20 is connected with a large pulley 23 through a belt, and the large pulley 23 is arranged at the left end of a large pulley shaft 24; the bearing pedestal II 22 supports a large pulley shaft 24 through a bearing; the right end of the large belt wheel shaft 24 is connected with an input shaft of the torque signal acquisition device 25 through a flange structure, a torque signal wire leading-out device 27 is arranged on the torque signal acquisition device 25, an output shaft of the torque signal acquisition device 25 is connected with the left end of the power-assisted large gear shaft 33 through a flange structure, and a power-assisted large gear 28 is arranged on the power-assisted large gear shaft 33; bearing seat III 34 supports the booster large gear shaft 33 through a bearing; the right end of the power-assisted large gear shaft 33 is connected with an input shaft of the dynamic torque sensor I7 through a coupler IV 37; the dynamic torque sensor base I4 supports a dynamic torque sensor I7; an output shaft of the dynamic torque sensor I7 is connected with an input shaft of the magnetic powder brake 6 through a coupler I5;
the booster motor 26 is connected with an input shaft of a booster motor reducer 29; a booster motor fixing plate 31 is fixed at the left end of the booster motor base 30, and the booster motor fixing plate 31 supports the booster motor 26 and the booster motor reducer 29 through bearings; an output shaft of the power-assisted motor reducer 29 is connected with a power-assisted pinion shaft, a power-assisted pinion 32 is arranged at the right end of the power-assisted pinion shaft, and the power-assisted pinion 32 is meshed with the power-assisted large gear 28;
A tensioner bottom plate 40 is horizontally arranged below the belt, the right end of the tensioner bottom plate 40 is fixedly connected with the underframe 1, the left end of the tensioner bottom plate 40 is provided with an inserting hole, a tensioner adjusting rod 41 vertically penetrates through the inserting hole of the tensioner bottom plate 40 and is fixed with the inserting hole, the upper end of the tensioner adjusting rod 41 is vertically provided with a tensioner roller 43, the right end of the tensioner roller 43 is connected with a tensioner roller 42, and the tensioner roller 42 is propped against the belt;
The control and data acquisition device comprises an electric control unit ECU35 of the electric power steering system, a dynamic torque sensor data acquisition module 36, an input motor control unit 38 and a tension control system 3; the dynamic torque sensor II 14 and the dynamic torque sensor I7 are electrically connected with the dynamic torque sensor data acquisition module 36; the torque signal acquisition device 25 is electrically connected with an electric control unit ECU35 of the electric power steering system; the input motor control unit 38 is electrically connected with the input torque motor 9; the tension control system 3 is electrically connected with the magnetic powder brake 6; the dynamic torque sensor data acquisition module 36, the electric power steering system electronic control unit ECU35, the torque signal acquisition device 25 and the tension control system 3 are all electrically connected with the upper computer.
Further, the first-stage ladder and the second-stage ladder of the underframe 1 are both provided with cross beams for increasing rigidity, the underframe 1 is further provided with four supporting feet, and the four supporting feet are respectively provided with a base plate for increasing the stressed area.
Further, the small pulley shaft 18 is a hollow shaft, and when the replacement shaft 17 is exchanged with the torque signal acquisition device 25, the shaft hole of the hollow shaft is used for leading out a signal wire of the torque signal acquisition device 25.
Further, the booster large gear shaft 33 is an integral structure, and includes a first shaft section, a second shaft section, a third shaft section, a fourth shaft section, a fifth shaft section, a sixth shaft section, a seventh shaft section and an eighth shaft section which are sequentially arranged from left to right, wherein the first shaft section, the second shaft section, the third shaft section, the fourth shaft section, the fifth shaft section, the sixth shaft section, the seventh shaft section and the eighth shaft section are coaxially arranged; wherein the first shaft section is of a flange structure; the diameter of the second shaft section is smaller than that of the first shaft section and the third shaft section; the right edge of the third shaft section protrudes out of the fourth shaft section to form a step surface for axially positioning the power-assisted large gear 28; the fourth shaft section is provided with a key slot for connecting the power-assisted large gear 28; the diameter of the fifth shaft section is smaller than that of the fourth shaft section and larger than that of the sixth shaft section; the right edge of the sixth shaft section protrudes out of the seventh shaft section to form a step surface for axially positioning the bearing seat III 34; the seventh shaft section is matched with the bearing seat III 34, and a key slot for connecting with the coupler IV 37 is arranged on the eighth shaft section.
Further, reinforcing ribs are arranged on the input torque motor base 8 and the power-assisted motor base 30.
The beneficial effects of the invention are as follows: 1) The electric control unit controls the motor to rotate, can provide various classical waveform torque curves, rotating speed curves and turning angle curves, inputs more representative torque for the detected electric power steering system, and has more accurate test results of the performance of the electric power steering system; 2) The possibility of replacing the position of the torque signal acquisition device is provided, and the performance test requirements of the electric power steering system with different composition structures can be met; 3) The magnetic powder brake mounting plane is different from other parts in mounting plane in horizontal height, so that the mounting reliability of system hardware is improved, the overall design structure is compact, the performance is reliable, all parts are connected by adopting screws or bolts, any part to be detected can be conveniently assembled and disassembled, the test requirement of one or more parts can be met, and more accurate test equipment is provided for the performance test of the electric power steering system.
Drawings
Fig. 1 is an oblique view of the present invention.
Fig. 2 is a left side view of the present invention.
Fig. 3 is a schematic structural view of the present invention.
Fig. 4 is a schematic structural view of the chassis of the present invention.
Fig. 5 is a schematic structural view of the input torque motor base and the booster motor base of the device of the present invention.
Fig. 6 is a schematic structural diagram of a dynamic torque sensor base i and a dynamic torque sensor base ii according to the present invention.
Fig. 7 is a schematic view of the structure of the torque signal wire drawing device of the present invention.
Fig. 8 is a schematic view of the structure of the base plate of the present invention.
Fig. 9 is a schematic structural view of the booster large gear shaft of the present invention.
Fig. 10 is a schematic view of the structure of the small pulley shaft of the present invention.
Reference numerals illustrate: the device comprises a 1-chassis, a 2-magnetic powder brake base plate, a 3-tension control system, a 4-dynamic torque sensor base plate I, a 5-coupler I, a 6-magnetic powder brake, a 7-dynamic torque sensor I, an 8-input torque motor base plate, a 9-input torque motor, a 10-input torque motor speed reducer, a 11-input torque motor fixing plate, a 12-coupler II, a 13-dynamic torque sensor base plate II, a 14-dynamic torque sensor II, a 15-coupler III, a 16-torque input shaft, a 17-replacement shaft, a 18-small belt wheel shaft, a 19-bearing seat I, a 20-small belt pulley, a 21-synchronous belt, a 22-bearing seat II, a 23-large belt pulley, a 24-large belt wheel shaft, a 25-torque signal acquisition device, a 26-booster motor, a 27-torque signal wire leading-out device, a 28-large gear, a 29-booster motor speed reducer, a 30-booster motor base plate, a 31-booster motor fixing plate, a 32-booster pinion, a 33-booster large gear shaft, a 34-bearing seat III, a 35-electric power steering system electric control ECU, a 36-motor dynamic booster ECU, a 37-booster dynamic booster sensor unit, a 37-data sensor module, a tensioning device 40, a roller input shaft, a roller control devices, a 43-tensioning device and a roller control device.
Detailed Description
The invention will be further described with reference to the following specific examples, but the scope of the invention is not limited thereto:
referring to the drawings, the performance testing equipment of the electric power steering system comprises a stepped chassis 1, a control and data acquisition device, an upper computer, a magnetic powder brake 6 and a testing component connected with the magnetic powder brake 6;
The underframe 1 is provided with two steps, the first step is arranged below the second step, the first step is provided with a magnetic powder brake bottom plate 2, the magnetic powder brake bottom plate 2 is provided with 4 threaded holes for connecting the magnetic powder brake 6 with the magnetic powder brake bottom plate 2 through bolts, the second step is provided with a bottom plate 39 for installing a test assembly, a control and data acquisition device, and the test assembly, the control and data acquisition device are all arranged along the length direction of the bottom plate 39; the middle of the first-stage ladder of the underframe 1 is provided with a cross beam, the middle of the second-stage ladder is provided with two cross beams for increasing the rigidity of the underframe 1, the underframe 1 is also provided with four supporting feet, and the four supporting feet are respectively provided with a base plate for increasing the stressed area.
The test assembly comprises an input torque motor 9, an input torque motor base 8, a dynamic torque sensor II 14, a dynamic torque sensor base II 13, a booster motor 26 and a booster motor base 30; the input torque motor 9 is connected with an input shaft of the input torque motor reducer 10;
An input torque motor fixing plate 11 is fixed at the right end of the input torque motor base 8, and the input torque motor base 8 and the input torque motor fixing plate 11 jointly support an input torque motor 9 and an input torque motor reducer 10; the input torque motor base 8 and the power-assisted motor base 30 are consistent in structure and comprise a vertical plate and a horizontal plate connected with the vertical plate, wherein the vertical plate is provided with a large square hole, 4 small through holes are formed in the periphery of the large square hole, the large square hole is respectively used for a coupler II 12 to pass through, the small through holes are used for being connected with an input torque motor fixing plate 11 through bolts, four straight grooves are formed in the horizontal plate and used for connecting the input torque motor base 8 with a bottom plate 39 through bolts, and reinforcing ribs are arranged between the vertical plate and the horizontal plate; the input torque motor fixing plate 11 and the power-assisted motor fixing plate 31 have the same structure, a large round hole is formed in the middle of the input torque motor fixing plate, 4 small round holes for being connected with the input torque motor base 8 through bolts are formed near the round holes, and the large round holes are used for penetrating through an output shaft of the input torque motor speed reducer 10;
An output shaft of the input torque motor reducer 10 is connected with an input shaft of a dynamic torque sensor II 14 through a coupler II 12;
The dynamic torque sensor base II 13 supports a dynamic torque sensor II 14; the dynamic torque sensor base II 13 and the dynamic torque sensor base I4 are consistent in structure and are provided with two layers of planes, 6 threaded holes are formed in the upper layer of planes, 4 through holes are formed in the lower layer of planes, and the threaded holes are used for connecting the dynamic torque sensor II 14 with the dynamic torque sensor base II 13 through bolts; the lower planar through-holes are used to connect the dynamic torque sensor mount ii 13 to the base plate 39.
An output shaft of the dynamic torque sensor II 14 is connected with the right end of a torque input shaft 16 through a coupler III 15, the left end of the torque input shaft 16 is connected with the right end of a replacement shaft 17 through a flange structure, and the left end of the replacement shaft 17 is connected with the right end of a small belt wheel shaft 18 through a flange structure; the small pulley shaft 18 is a hollow shaft, and when the replacement shaft 17 is exchanged with the torque signal acquisition device 25, the shaft hole of the hollow shaft is used for leading out a signal wire of the torque signal acquisition device 25.
The bearing seat I19 supports the small pulley shaft 18, the middle shaft section of the small pulley shaft 18 is arranged in the bearing seat I19 through a bearing and is axially positioned by a clamp spring, and the left end of the small pulley shaft 18 extends out of the underframe 1; the left end of the small pulley shaft 18 is provided with a small pulley 20, the small pulley 20 is connected with a large pulley 23 through a belt, and the large pulley 23 is arranged at the left end of a large pulley shaft 24; bearing block II 22 supports large pulley shaft 24; the right end of the large pulley shaft 24 is connected with an input shaft of the torque signal acquisition device 25 through a flange structure, and a torque signal wire leading-out device 27 is arranged on the torque signal acquisition device 25.
The torque signal wire leading-out device 27 has 4 little through-holes in one end, 1 eccentric big through-hole, and the other end is excavated, and the edge distributes threaded hole, and little through-hole is used for connecting torque signal wire leading-out device 27 with torque signal acquisition device 25 through the bolt. The middle section of the torque signal wire leading-out device 27 is provided with a notch, and the eccentric large through hole and the notch are used for leading out the torque signal wire;
The output shaft of the torque signal acquisition device 25 is connected with the left end of the power-assisted large gear shaft 33 through a flange structure, and the power-assisted large gear shaft 33 is provided with a power-assisted large gear 28; bearing housing iii 34 supports power assist pinion shaft 33; the right end of the power-assisted large gear shaft 33 is connected with an input shaft of the dynamic torque sensor I7 through a coupler IV 37; the booster large gear shaft 33 is an integral structure, and includes a first shaft section, a second shaft section, a third shaft section, a fourth shaft section, a fifth shaft section, a sixth shaft section, a seventh shaft section and an eighth shaft section which are sequentially arranged from left to right, wherein the first shaft section, the second shaft section, the third shaft section, the fourth shaft section, the fifth shaft section, the sixth shaft section, the seventh shaft section and the eighth shaft section are coaxially arranged; wherein the first shaft section is of a flange structure; the diameter of the second shaft section is smaller than that of the first shaft section and the third shaft section; the right edge of the third shaft section protrudes out of the fourth shaft section to form a step surface for axially positioning the power-assisted large gear 28; the fourth shaft section is provided with a key slot for connecting the power-assisted large gear 28; the diameter of the fifth shaft section is smaller than that of the fourth shaft section and larger than that of the sixth shaft section; the right edge of the sixth shaft section protrudes out of the seventh shaft section to form a step surface for axially positioning the bearing seat III 34; the seventh shaft section is matched with the bearing seat III 34, and a key slot for connecting with the coupler IV 37 is formed in the eighth shaft section;
the dynamic torque sensor base I4 supports a dynamic torque sensor I7; an output shaft of the dynamic torque sensor I7 is connected with an input shaft of the magnetic powder brake 6 through a coupler I5;
The booster motor 26 is connected with an input shaft of a booster motor reducer 29; a booster motor fixing plate 31 is fixed at the left end of the booster motor base 30, and the booster motor 26 and a booster motor reducer 29 are supported by the booster motor base 30 and the booster motor fixing plate 31; an output shaft of the power-assisted motor reducer 29 is connected with a power-assisted pinion shaft, a power-assisted pinion 32 is arranged at the right end of the power-assisted pinion shaft, and the power-assisted pinion 32 is meshed with the power-assisted large gear 28;
A tensioner bottom plate 40 is horizontally arranged below the belt, the right end of the tensioner bottom plate 40 is fixedly connected with the underframe 1 through a bolt, the left end of the tensioner bottom plate 40 is provided with an inserting hole, a tensioner adjusting rod 41 vertically penetrates through the inserting hole of the tensioner bottom plate 40 and is fixed with the inserting hole, the upper end of the tensioner adjusting rod 41 is vertically provided with a stepped hole, the left end of a tensioner roller 43 is arranged in the stepped hole and is fastened by a screw, the right end of the tensioner roller 43 is connected with a tensioner roller 42, and the tensioner roller 42 abuts against the belt;
The control and data acquisition device comprises an electric control unit ECU35 of the electric power steering system, a dynamic torque sensor data acquisition module 36, an input motor control unit 38 and a tension control system 3; the dynamic torque sensor II 14 and the dynamic torque sensor I7 are electrically connected with the dynamic torque sensor data acquisition module 36; the torque signal acquisition device 25 is electrically connected with an electric control unit ECU35 of the electric power steering system; the input motor control unit 38 is electrically connected with the input torque motor 9; the tension control system 3 is electrically connected with the magnetic powder brake 6; the dynamic torque sensor data acquisition module 36, the electric power steering system electronic control unit ECU35, the torque signal acquisition device 25 and the tension control system 3 are all electrically connected with the upper computer. Wherein the tension control system 3 is closest to the magnetic powder brake 6, facilitates the adjustment control of the magnetic powder brake 6, and is next to the input motor control unit 38. The electric power steering system electric control unit ECU35 is closest to the power assist motor 26, and the dynamic torque sensor data acquisition module 36 is between the electric power steering system electric control unit ECU35 and the input motor control unit 38.
The specific working principle is as follows: 1) The electric power steering system is provided with a power-assisted system performance test; 24V voltage-stabilizing direct current power supplies are respectively provided for an electric control unit ECU35, an input motor control unit 38 and a dynamic torque sensor data acquisition module 36 of the electric power steering system, 220V alternating current power supplies are provided for a tension control system 3, and an indicator light on the electric control unit ECU35 of the electric power steering system is on green, so that the running system is normal. The input motor 9 starts to operate by pressing a button of the input motor control unit 38 to select an input mode, and provides input torque, which is sequentially transmitted to the small pulley 20 through the dynamic torque sensor ii 14, the torque input shaft 16, the replacement shaft 17 and the small pulley shaft 18, and is then transmitted to the torque signal acquisition device 25 after being decelerated. The torque signal acquisition device 25 acquires a torque signal through the detection element, the torque signal is transmitted to the electric power steering system electric control unit ECU35 through a lead wire, the signal is processed by the electric power steering system electric control unit ECU35, and the power-assisted current with corresponding magnitude is provided according to a corresponding power-assisted curve and is transmitted to the power-assisted motor 26. The booster motor 26 provides a proper moment, the moment is amplified by the speed reducer and then is transmitted to the booster pinion 32 and the booster gearwheel 28, the booster distance is overlapped with the moment generated by the input torque motor 9 and transmitted to the booster gearwheel 28, and the moment reaches the input shaft of the magnetic powder brake 6 through the dynamic torque sensor I7 to drive the magnetic powder brake 6 to rotate. In the process, torque signals of the dynamic torque sensor I7 and the dynamic torque sensor II 14 are transmitted to the dynamic torque sensor data acquisition module 36, the processed torque signals are transmitted to an upper computer, and torque signals acquired by the torque signal acquisition device 25 and power-assisted current magnitude signals generated by the electric control unit ECU35 of the electric power-assisted steering system are transmitted to the upper computer. After the upper computer obtains the signals, the corresponding curves are displayed after processing, comprehensive power-assisted condition performance test data of the electric power-assisted steering system are provided for test operators, and the performance test of the electric power-assisted steering system is completed.
2) The system performance test of the electric power steering system without power assistance; the input torque motor reducer 10 replaces the appropriate gear ratio to provide 24V regulated dc power to the input motor control unit 38 and the dynamic torque sensor data acquisition module 36, respectively, and 220V ac power to the tension control system 3. The button of the input motor control unit 38 is pressed to select an input mode, the input torque motor 9 starts to work to provide input torque, the torque is sequentially transmitted to the small belt pulley 20 through the dynamic torque sensor II 14, the torque input shaft 16, the replacement shaft 17 and the small belt pulley shaft 18, and after being decelerated, the torque sequentially passes through the torque signal acquisition device 25, the torque signal wire extraction device 27, the power-assisted large gear shaft 33 and the dynamic torque sensor I7, reaches the input shaft of the magnetic powder brake 6, and drives the magnetic powder brake 6 to rotate. In the process, torque signals of the dynamic torque sensor I7 and the dynamic torque sensor II 14 are transmitted to the dynamic torque sensor data acquisition module 36, the signals are transmitted to an upper computer after being processed, and after the upper computer obtains the signals, the signals are processed to display corresponding curves, so that comprehensive power-free condition performance test data of the electric power-assisted steering system are provided for test operators, and the performance test of the electric power-assisted steering system is completed.
The embodiments described in the present specification are merely examples of implementation forms of the inventive concept, and the scope of protection of the present invention should not be construed as being limited to the specific forms set forth in the embodiments, and the scope of protection of the present invention and equivalent technical means that can be conceived by those skilled in the art based on the inventive concept.
Claims (3)
1. An electric power steering system performance test device, characterized in that: the test device comprises a ladder-type underframe (1), a control and data acquisition device, an upper computer, a magnetic powder brake (6) and a test assembly connected with the magnetic powder brake (6);
The underframe (1) is provided with two stages of steps, the first stage of steps are arranged below the second stage of steps, the first stage of steps are provided with a magnetic powder brake bottom plate (2) for installing a magnetic powder brake (6), the second stage of steps are provided with a bottom plate (39) for installing a test assembly, a control and data acquisition device, and the test assembly, the control and the data acquisition device are all arranged along the length direction of the bottom plate (39);
the test assembly comprises an input torque motor (9), an input torque motor base (8), a dynamic torque sensor II (14), a dynamic torque sensor base II (13), a booster motor (26) and a booster motor base (30); the input torque motor (9) is connected with an input shaft of the input torque motor speed reducer (10); an input torque motor fixing plate (11) is fixed at the right end of the input torque motor base (8), and the input torque motor fixing plate (11) supports the input torque motor (9) and the input torque motor reducer (10) through bearings; an output shaft of the input torque motor reducer (10) is connected with an input shaft of the dynamic torque sensor II (14) through a coupler II (12); the dynamic torque sensor base II (13) supports the dynamic torque sensor II (14); an output shaft of the dynamic torque sensor II (14) is connected with the right end of a torque input shaft (16) through a coupler III (15), the left end of the torque input shaft (16) is connected with the right end of a replacement shaft (17) through a flange structure, and the left end of the replacement shaft (17) is connected with the right end of a small belt wheel shaft (18) through a flange structure; the bearing seat I (19) supports the small pulley shaft (18) through a bearing, and the left end of the small pulley shaft (18) extends out of the underframe (1); the left end of the small belt wheel shaft (18) is provided with a small belt wheel (20), the small belt wheel (20) is connected with a large belt wheel (23) through a belt, and the large belt wheel (23) is arranged at the left end of the large belt wheel shaft (24); the bearing seat II (22) supports a large pulley shaft (24) through a bearing; the right end of the large belt wheel shaft (24) is connected with an input shaft of the torque signal acquisition device (25) through a flange structure, a torque signal wire leading-out device (27) is arranged on the torque signal acquisition device (25), an output shaft of the torque signal acquisition device (25) is connected with the left end of the power-assisted large gear shaft (33) through a flange structure, and a power-assisted large gear (28) is arranged on the power-assisted large gear shaft (33); the bearing seat III (34) supports the power-assisted large gear shaft (33) through a bearing; the right end of the power-assisted large gear shaft (33) is connected with the input shaft of the dynamic torque sensor I (7) through a coupler IV (37); the dynamic torque sensor base I (4) supports the dynamic torque sensor I (7); an output shaft of the dynamic torque sensor I (7) is connected with an input shaft of the magnetic powder brake (6) through a coupler I (5);
The power-assisted motor (26) is connected with an input shaft of a power-assisted motor speed reducer (29); a power-assisted motor fixing plate (31) is fixed at the left end of the power-assisted motor base (30), and the power-assisted motor fixing plate (31) supports the power-assisted motor (26) and the power-assisted motor reducer (29) through bearings; an output shaft of the power-assisted motor reducer (29) is connected with a power-assisted pinion shaft, a power-assisted pinion (32) is arranged at the right end of the power-assisted pinion shaft, and the power-assisted pinion (32) is meshed with the power-assisted large gear (28);
A tensioning device bottom plate (40) is horizontally arranged below the belt, the right end of the tensioning device bottom plate (40) is fixedly connected with the underframe (1), the left end of the tensioning device bottom plate (40) is provided with a jack, a tensioning device adjusting rod (41) vertically penetrates through the jack of the tensioning device bottom plate (40) and is fixed with the jack, the upper end of the tensioning device adjusting rod (41) is vertically provided with a tensioning device rolling shaft (43), the right end of the tensioning device rolling shaft (43) is connected with a tensioning device rolling wheel (42), and the tensioning device rolling wheel (42) is propped against the belt;
The control and data acquisition device comprises an electric control unit ECU (35) of the electric power steering system, a dynamic torque sensor data acquisition module (36), an input motor control unit (38) and a tension control system (3); the dynamic torque sensor II (14) and the dynamic torque sensor I (7) are electrically connected with the dynamic torque sensor data acquisition module (36); the torque signal acquisition device (25) is electrically connected with an electric control unit ECU (35) of the electric power steering system; the input motor control unit (38) is electrically connected with the input torque motor (9); the tension control system (3) is electrically connected with the magnetic powder brake (6); the dynamic torque sensor data acquisition module (36), the electric power steering system electronic control unit ECU (35), the torque signal acquisition device (25) and the tension control system (3) are all electrically connected with the upper computer;
The first-stage ladder and the second-stage ladder of the underframe (1) are respectively provided with a cross beam for increasing rigidity, the underframe (1) is also provided with four supporting feet, and the four supporting feet are respectively provided with a base plate for increasing the stress area;
the small pulley shaft (18) is a hollow shaft, and when the replacement shaft (17) is exchanged with the torque signal acquisition device (25), the shaft hole of the hollow shaft is used for leading out a signal wire of the torque signal acquisition device (25).
2. An electric power steering system performance test apparatus according to claim 1, wherein: the power-assisted large gear shaft (33) is of an integrated structure and comprises a first shaft section, a second shaft section, a third shaft section, a fourth shaft section, a fifth shaft section, a sixth shaft section, a seventh shaft section and an eighth shaft section which are sequentially arranged from left to right, wherein the first shaft section, the second shaft section, the third shaft section, the fourth shaft section, the fifth shaft section, the sixth shaft section, the seventh shaft section and the eighth shaft section are coaxially arranged; wherein the first shaft section is of a flange structure; the diameter of the second shaft section is smaller than that of the first shaft section and the third shaft section; the right edge of the third shaft section protrudes out of the fourth shaft section to form a step surface for axially positioning the power-assisted large gear (28); a key slot for connecting the power-assisted large gear (28) is arranged on the fourth shaft section; the diameter of the fifth shaft section is smaller than that of the fourth shaft section and larger than that of the sixth shaft section; the right edge of the sixth shaft section protrudes out of the seventh shaft section to form a step surface for axially positioning a bearing seat III (34); the seventh shaft section is matched with a bearing seat III (34), and a key groove used for being connected with a coupler IV (37) is formed in the eighth shaft section.
3. An electric power steering system performance test apparatus according to claim 1, wherein: reinforcing ribs are arranged on the input torque motor base (8) and the power-assisted motor base (30).
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