Automobile Steering Gear Live Simulation Test System

Abstract

The present invention discloses an in-situ simulation test system for an automotive steering gear. An installation platform is provided at the middle position of the bottom of the box body. Seven nozzles are provided on each of the front and rear side walls of the box body. Each nozzle can spray a muddy water mixture while swinging. The left cover and the right cover are installed on the upper end of the box body through hinges; a first connecting frame, a first rotating frame, a screw hole slider, an umbrella cover nut, an end connector, and a damper constitute a set of resistance guiding and adjusting devices, and the resistance of the damper can be adjusted according to the magnetic field intensity. Two sets of resistance guiding and adjusting devices are installed on each of the left and right side walls of the box body. Two steering gears are fixedly installed on the installation platform, and the two ends of the two steering gears are respectively connected to the corresponding resistance guiding and adjusting devices; a swing plate is installed on the upper end of the box body and can move left and right and flip up and down. A moving positioning frame and an input motor are respectively installed on the upper and lower sides of the swing plate. The input motor can drive the rotation of the input shafts of the two steering gears through two synchronous belts.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive steering gear tests, and particularly to a live simulation test system for automotive steering gears. Background Art

[0002] In recent years, China's automotive manufacturing technology has made great progress and achieved fruitful results. In the process of automotive production and manufacturing, durability tests of components are very necessary. Real vehicle tests are not only highly dangerous but also expensive. Manufacturers prefer to use test equipment to simulate tests under different working conditions. This method is not only safe, convenient, and low-cost, but also can achieve relatively ideal results. As one of the most important components of an automobile, the steering gear needs to undergo strict performance tests and durability tests during production to verify its reliability and obtain the best working state. Among them, the REPS steering system (rack-type electric power steering system) is a very widely used steering gear mechanism. In the REPS steering system, the assist system with the motor directly arranged on the rack amplifies the assist motor through a belt and a ball screw drive mechanism, thereby assisting the driver in steering the vehicle while driving. And the mud and water test is a necessary conventional DV / PV test for REPS. Therefore, it is very necessary to develop a live simulation test system for REPS. Summary of the Invention

[0003] To solve the deficiencies of the prior art, the object of the present invention is to provide a live simulation test system for an automotive steering gear, which mainly includes a box body, a damper, a first connecting frame, a left cover, a right cover, a water inlet pipe, a spiral hose, a sealing cover, a nozzle control board, nozzles, a swing plate, an input motor, a tower pulley, an end connector, a screw hole slider, a left swing arm, a moving positioning frame, a right swing arm, an upper left shaft, a lower left shaft, an upper right shaft, a lower right shaft, a right sliding positioning block, a right locking rotation knob, a right positioning knob, a left positioning knob, a left locking rotation knob, a left sliding positioning block, and is characterized in that: on the front and rear sides inside the box body, there are respectively a front T-shaped groove and a rear T-shaped groove; on the front and rear side walls of the box body, there are respectively seven ball socket structures; in the middle position at the bottom of the box body, there is an installation platform, and on both the left and right sides of the installation platform, there are two inclined plane structures, and at the bottom end of the inclined plane structures, there are horizontally arranged water filtering holes and a water outlet pipe; on the front and rear side walls of the box body, there are seven nozzles each, and each nozzle can spray a muddy water mixture while swinging; on the front and rear sides of the box body, there are two water inlet pipes, and each water inlet pipe is connected to the corresponding nozzle through seven spiral hoses; the left cover and the right cover are installed on the upper end of the box body through hinges; the three guiding round rods in the first connecting frame connect the triangular arc plate at the left end and the first circular ring frame at the right end into a whole, the first rotating frame is installed on the right side of the first circular ring frame and forms a rotating pair, the screw hole slider is installed inside the first rotating frame and forms a moving pair, and the end connector is positioned through a canopy nut and the screw hole slider; the cavity inside the damper is filled with magnetorheological fluid, and an electromagnetic coil is arranged inside its side wall. On the piston plate at the middle position of the damping guide rod, there are three through holes, and the piston plate divides the magnetorheological fluid inside the damper into left and right parts, and the resistance of the damper can be adjusted by the magnetic field intensity of the electromagnetic coil; the damper is located at the center position of the first connecting frame, and both ends of the damping guide rod are firmly connected to both ends of the first connecting frame; the first connecting frame is installed on the left side wall of the box body and forms a moving pair, and the damper inside it is fixedly connected to the box body; the first connecting frame, the first rotating frame, the screw hole slider, the canopy nut, the end connector, and the damper form a set of resistance guiding and adjusting device, and there are two sets of resistance guiding and adjusting devices installed on each of the left and right side walls of the box body; two steering gears are fixedly installed on the installation platform, and both ends of the two steering gears are respectively connected to the corresponding resistance guiding and adjusting devices; in the middle position of the swing plate, there is a sliding positioning groove, and both ends of the swing plate are respectively rotationally connected to the left sliding positioning block and the right sliding positioning block. The left sliding positioning block and the right sliding positioning block are respectively installed in the rear T-shaped groove and the front T-shaped groove and form a moving pair, and the left positioning knob and the right positioning knob lock the positions of the left sliding positioning block and the right sliding positioning block through a threaded structure; the left locking rotation knob and the right locking rotation knob are installed at both ends of the swing plate and lock the inclination angle of the swing plate through a threaded structure;The mobile positioning frame and the input motor are respectively installed on the upper and lower sides of the sliding positioning groove. The rear ends of the left swing arm and the right swing arm are rotatably installed on the mobile positioning frame. Two belt pulleys are coaxially arranged on the tower pulley. The tower pulley is fixedly connected to the output shaft of the input motor through the tower pulley shaft. The upper left shaft and the upper right shaft are respectively rotatably installed at the front ends of the left swing arm and the right swing arm. The tower pulley drives the rotation of the upper left shaft and the upper right shaft through two synchronous belts. The lower ends of the lower left shaft and the lower right shaft are respectively installed inside the upper left shaft and the upper right shaft and can be telescopic. The lower ends of the lower left shaft and the lower right shaft are respectively connected to the input shafts of the two steering machines.;

[0004] As a further solution of the present invention: A plurality of obliquely penetrating drain holes are provided below the front T-shaped groove and the rear T-shaped groove. The upper end of each drain hole is communicated with the inside of the front T-shaped groove or the rear T-shaped groove, and the lower end of each drain hole is communicated with the inside of the box body. The drain holes can introduce the muddy water in the side T-shaped groove into the box body.

[0005] As a further solution of the present invention: A circular T-shaped groove is provided inside the right side of the first circular ring frame. Two arc-shaped sliders are provided at both ends of the left side of the first rotating frame. The two arc-shaped sliders are installed in the circular T-shaped groove inside the first circular ring frame, so that the first rotating frame can rotate freely. A straight T-shaped groove is provided inside the right side of the first rotating frame.

[0006] As a further solution of the present invention: Two belt pulleys are coaxially arranged on the tower pulley, and the diameter of the lower belt pulley is larger than that of the upper belt pulley.

[0007] As a further solution of the present invention: The input motor, the left swing arm, the right swing arm and related connecting components are sealed by a sealing cover, and the sealing cover is made of flexible rubber.

[0008] As a further solution of the present invention: A nozzle is provided at the front end of the nozzle, a positioning spherical surface is provided at the rear end of the nozzle, a swinging spherical surface is provided behind the positioning spherical surface, and an interface is provided at the rear end of the swinging spherical surface.

[0009] As a further solution of the present invention: Transparent glass observation windows are provided on both the left cover and the right cover.

[0010] Advantages of the present invention: (1) The input shaft positions of steering gears of different models are different, and the input shaft inclination angles are also different. The swing plate can move left and right to adjust the position and swing up and down to adjust the inclination angle, so as to meet the connection requirements with the input shafts of steering gears of different models. (2) The resistance of the four connecting frames can be adjusted according to the magnetic field strength of the coils inside them. The greater the magnetic field strength of the coils, the greater the resistance. Therefore, corresponding resistance values can be set according to different steering gear models to simulate the actual working load of the steering gear. (3) Two pulleys are coaxially arranged on the tower pulley, and the diameter of the lower pulley is larger than that of the upper pulley. Therefore, the transmission ratios between the input motor and the two steering gear input shafts are different, enabling the two steering gears to work at different speeds to simulate the working conditions of the steering gear under different rotational speeds. (4) A circular ring frame is provided at the inner end of each connecting frame. A rotating frame is installed on the circular ring frame to form a rotating pair. A straight T-shaped groove is provided on the rotating frame, and a movable screw hole slider is arranged in the straight T-shaped groove. The end connector and the screw hole slider form a thread pair. Therefore, the end connector can be positioned at any position inside the circular ring frame, further meeting the connection requirements of steering gears of different models. Description of the Drawings

[0011] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0012] Figure 2 It is a schematic diagram of the overall structure of the present invention.

[0013] Figure 3 It is a schematic diagram of the longitudinal sectional structure of the present invention.

[0014] Figure 4 It is a schematic diagram of the enlarged partial section at the position of the first connecting frame in the present invention.

[0015] Figure 5 It is a schematic diagram of the transverse sectional structure of the present invention.

[0016] Figure 6 It is a schematic diagram of the principle of the nozzle swing structure in the present invention.

[0017] Figure 7 It is a schematic diagram of the structure of the moving positioning frame in the present invention.

[0018] Figure 8 It is a schematic diagram of the structure of the swing plate in the present invention.

[0019] Figure 9 It is a schematic diagram of the structure of the nozzle in the present invention.

[0020] Figure 10 It is a schematic diagram of the structure of the first crankshaft pulley in the present invention.

[0021] Reference numerals: 1 housing, 101 first water outlet pipe, 102 second water outlet pipe, 103 front T-shaped groove, 104 right drainage hole, 105 clearance port, 106 first water filter hole, 107 second water filter hole, 108 mounting platform, 109 left drainage hole, 2 damper, 201 damping guide rod, 3 first connecting frame, 301 first circular frame, 302 first rotating frame, 4 second connecting frame, 401 second circular frame, 402 second rotating frame Moving frame, 5 side cover, 6 left cover, 7 right cover, 8 fourth connecting frame, 801 fourth ring frame, 802 fourth rotating frame, 9 water inlet pipe, 10 spiral hose, 11 sealing cover, 12 third connecting frame, 1201 third ring frame, 1202 third rotating frame, 13 nozzle control board, 1301 follow-up ear, 14 nozzle, 1401 positioning spherical surface, 1402 swing spherical surface, 15 first steering gear, 16 second steering gear, 17 swing plate, 1701 sliding positioning groove, 1702 right threaded hole, 1703 left threaded hole, 18 input motor, 19 right pulley, 20 left pulley, 21 left synchronous belt, 22 right synchronous belt, 23 tower pulley, 24 end connector, 25 umbrella cover nut, 26 screw hole slider, 27 tower pulley shaft, 28 left swing arm, 29 mobile positioning frame, 2901 square plate, 2902 optical axis, 30 right swing arm, 31 left upper shaft, 32 left lower shaft, 33 Right upper shaft, 34 right lower shaft, 35 right sliding positioning block, 36 right locking knob, 37 right positioning knob, 38 left positioning knob, 39 left locking knob, 40 left sliding positioning block, 41 first crankshaft wheel, 4101 rotating shaft, 4102 nozzle pulley, 4103 circular plate, 4104 toggle shaft, 42 second crankshaft wheel, 43 first guide wheel, 44 driving wheel, 45 nozzle swing motor, 46 second guide wheel, 47 nozzle swing timing belt. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with specific embodiments. The illustrative embodiments and descriptions of the present invention are used to explain the present invention but are not intended to limit the present invention.

[0023] like Figure 1-10As shown, the in-situ simulation test system for an automotive steering gear mainly includes a box body 1, a damper 2, a first connecting frame 3, a second connecting frame 4, a side cover 5, a left cover 6, a right cover 7, a fourth connecting frame 8, a water inlet pipe 9, a spiral hose 10, a sealing cover 11, a third connecting frame 12, a nozzle control board 13, nozzles 14, a first steering gear 15, a second steering gear 16, a swing plate 17, an input motor 18, a right pulley 19, a left pulley 20, a left synchronous belt 21, a right synchronous belt 22, a tower pulley 23, an end connector 24, an umbrella cover nut 25, a screw hole slider 26, a tower pulley shaft 27, a left swing arm 28, a moving positioning frame 29, a right swing arm 30, an upper left shaft 31, a lower left shaft 32, an upper right shaft 33, a lower right shaft 34, a right sliding positioning block 35, a right locking rotation knob 36, a right positioning knob 37, a left positioning knob 38, a left locking rotation knob 39, a left sliding positioning block 40, a first crankshaft pulley 41, a second crankshaft pulley 42, a first guide pulley 43, a driving wheel 44, a nozzle swing motor 45, a second guide pulley 46, and a nozzle swing synchronous belt 47. It is characterized in that: a front T-shaped groove 103 is longitudinally arranged at the upper end of the front side inside the box body 1. Below the front T-shaped groove 103, there are multiple obliquely penetrating right drainage holes 104. The upper end of each right drainage hole 104 is communicated with the inside of the front T-shaped groove 103, and the lower end of each right drainage hole 104 is communicated with the inside of the box body 1. The right drainage holes 104 can introduce the muddy water in the front T-shaped groove 103 into the box body 1 to avoid blockage in the front T-shaped groove 103. Two relief openings 105 are arranged at both ends of the front T-shaped groove 103; a rear T-shaped groove is horizontally and longitudinally arranged at the upper end of the rear side inside the box body 1. Below the rear T-shaped groove, there are multiple obliquely penetrating left drainage holes 109. The upper end of each left drainage hole 109 is communicated with the inside of the rear T-shaped groove, and the lower end of each left drainage hole 109 is communicated with the inside of the box body 1. The left drainage holes 109 can introduce the muddy water in the rear T-shaped groove into the box body 1 to avoid blockage in the rear T-shaped groove. Two relief openings are arranged at both ends of the rear T-shaped groove; seven ball socket structures are longitudinally arranged at equal intervals inside the front side wall of the box body 1. Seven ball socket structures are longitudinally arranged at equal intervals inside the rear side wall of the box body 1. The positions of the front and rear groups of ball socket structures correspond to each other; an installation platform 108 is arranged at the middle position of the bottom of the box body 1. Multiple inverted T-shaped grooves are longitudinally arranged on the installation platform 108. The installation platform 108 can be used to install the steering gear to be tested; two inclined plane structures are arranged on the left side of the installation platform 108, and multiple first water filtering holes 106 are horizontally arranged at the bottom ends of the two inclined plane structures. The lower ends of all the first water filtering holes 106 are communicated with a first water outlet pipe 101; two inclined plane structures are arranged on the right side of the installation platform 108, and multiple second water filtering holes 107 are horizontally arranged at the bottom ends of the two inclined plane structures. The lower ends of all the second water filtering holes 107 are communicated with a second water outlet pipe 102; the first water outlet pipe 101 and the second water outlet pipe 102 are used to discharge the muddy water for the test, and both are communicated with a muddy water supply device to achieve circulation;A transparent glass observation window is provided on the left cover 6. The left end of the left cover 6 is installed on the upper left end of the box body 1 through a hinge. Two handles are installed on the front and rear sides of the right end of the left cover 6 to facilitate the opening and closing of the left cover 6. A transparent glass observation window is provided on the right cover 7. The right end of the right cover 7 is installed on the upper right end of the box body 1 through a hinge. Two handles are installed on the front and rear sides of the left end of the right cover 7 to facilitate the opening and closing of the right cover 7.

[0024] As Figure 3 , Figure 4 shown, three guiding round rods are provided on the first connecting frame 3. The right ends of the three guiding round rods are fixedly connected to the first ring frame 301. The left ends of the three guiding round rods are fixedly connected through a triangular arc plate. The first connecting frame 3 is installed on the left side wall of the box body 1 and can move left and right. A circular T-shaped groove is provided inside the right side of the first ring frame 301. The first rotating frame 302 is in a straight plate structure. Two arc-shaped sliders are provided at both ends of the left side of the first rotating frame 302. The two arc-shaped sliders are installed in the circular T-shaped groove inside the first ring frame 301, so that the first rotating frame 302 can rotate freely. A straight T-shaped groove is provided inside the right side of the first rotating frame 302. The screw hole slider 26 is in a square block structure, and a threaded hole is provided at the center position. The screw hole slider 26 is installed in the straight T-shaped groove inside the first rotating frame 302 and forms a moving pair. A connecting round hole is vertically provided at the right end of the end connector 24. The left end of the end connector 24 is in a horizontal threaded rod structure. The umbrella cap nut 25 is installed on the left end of the end connector 24 and forms a threaded pair. The left end of the end connector 24 is installed with the threaded hole at the center of the screw hole slider 26 and forms a threaded pair. After rotating and pressing the umbrella cap nut 25 against the first rotating frame 302, the position of the end connector 24 on the first rotating frame 302 can be fixed by using the double-nut locking principle.

[0025] The described damper 2 is internally provided with a sealed cavity filled with magnetorheological fluid, and an electromagnetic coil is arranged inside the side wall of the damper 2; a piston plate is arranged at the middle position of the damping guide rod 201, and three through holes are equidistantly arranged on the piston plate. The damping guide rod 201 is installed inside the damper 2, and the piston plate divides the cavity inside the damper 2 into left and right parts. The magnetorheological fluid in the left and right parts is connected through the three through holes on the piston plate; after the above electromagnetic coil is energized, a magnetic field can be generated inside the damper 2, and the magnetorheological fluid can change its own viscosity according to the magnetic field strength, so as to realize the adjustment of the resistance of the damper; the damper 2 is fixedly installed on the left side wall of the box body 1 and is located at the inner center position of the first ring frame 301. At the same time, the left end of the damping guide rod 201 is fixedly connected to the triangular arc plate at the left end of the first connecting frame 3, and the right end of the damping guide rod 201 is fixedly connected to the first ring frame 301 at the right end of the first connecting frame 3. Thus, the first connecting frame 3 can drive the damping guide rod 201 to move left and right, so that the magnetorheological fluid in the cavity inside the damper 2 flows mutually on both sides of the piston plate, and further provides resistance for the left and right movement of the first connecting frame 3, so as to simulate the resistance of the wheel rotation under the actual working conditions.

[0026] The second connecting frame 4 has the same structure as the first connecting frame 3. A second circular ring frame 401 is provided at the right end of the second connecting frame 4. The second rotating frame 402 has the same structure as the first rotating frame 302. The second rotating frame 402 is installed on the right side of the second circular ring frame 401 and forms a rotating pair. A movable screw hole slider is provided in the straight T-shaped groove inside the second rotating frame 402. A terminal connector and a canopy nut are also provided on the right side of the screw hole slider. The canopy nut and the above-mentioned screw hole slider fix the position of the terminal connector on the second rotating frame 402 through the double-nut locking principle; The second connecting frame 4 is installed on the left side wall of the box body 1 and can move left and right. And the second connecting frame 4 is located in front of the first connecting frame 3. A damper is also provided at the central position inside the second connecting frame 4. The two ends of the damping guide rod inside the damper are respectively fixedly connected to the two ends of the second connecting frame 4; The third connecting frame 12 has the same structure as the second connecting frame 4 but is installed in the opposite direction. A third circular ring frame 1201 is provided at the left end of the third connecting frame 12. The third circular ring frame 1201 has the same structure as the second circular ring frame 401. The third rotating frame 1202 has the same structure as the second rotating frame 402. The third rotating frame 1202 is installed on the left side of the third circular ring frame 1201 and forms a rotating pair. A movable screw hole slider is provided in the straight T-shaped groove inside the third rotating frame 1202. A terminal connector and a canopy nut are provided on the left side of the screw hole slider. The canopy nut and the above-mentioned screw hole slider fix the position of the terminal connector on the third rotating frame 1202 through the double-nut locking principle; The third connecting frame 12 is installed on the right side wall of the box body 1 and can move left and right. And the position of the third connecting frame 12 is coaxially corresponding to the position of the second connecting frame 4. A damper is also provided at the central position inside the third connecting frame 12. The two ends of the damping guide rod inside the damper are respectively fixedly connected to the two ends of the third connecting frame 12; The fourth connecting frame 8 has the same structure as the third connecting frame 12. A fourth circular ring frame 801 is provided at the left end of the fourth connecting frame 8. The fourth circular ring frame 801 has the same structure as the third circular ring frame 1201. The fourth rotating frame 802 has the same structure as the third rotating frame 1202. The fourth rotating frame 802 is installed on the left side of the fourth circular ring frame 801 and forms a rotating pair. A movable screw hole slider is provided in the straight T-shaped groove inside the fourth rotating frame 802. A terminal connector and a canopy nut are provided on the left side of the screw hole slider. The canopy nut and the above-mentioned screw hole slider fix the position of the terminal connector on the fourth rotating frame 802 through the double-nut locking principle; The fourth connecting frame 8 is installed on the right side wall of the box body 1 and can move left and right. And the position of the fourth connecting frame 8 is coaxially corresponding to the position of the first connecting frame 3. A damper is also provided at the central position inside the fourth connecting frame 8. The two ends of the damping guide rod inside the damper are respectively fixedly connected to the two ends of the fourth connecting frame 8.

[0027] The described first steering gear 15 and second steering gear 16 are both fixedly installed on the mounting table 108 by bolts. The left end of the first steering gear 15 is firmly connected to the end connector 24 on the right side of the first rotating frame 302, and the right end of the first steering gear 15 is firmly connected to the end connector on the left side of the fourth rotating frame 802; the left end of the second steering gear 16 is firmly connected to the end connector on the right side of the second rotating frame 402, and the right end of the second steering gear 16 is firmly connected to the end connector on the left side of the third rotating frame 1202.

[0028] As Figure 3 , Figure 5 shown, the right end of the right sliding positioning block 35 is a square structure, the left end of the right sliding positioning block 35 is provided with a stepped cylindrical structure, and a through threaded hole is arranged inside the right sliding positioning block 35. The square structure at the right end of the right sliding positioning block 35 is installed in the front T-shaped groove 103 to form a moving pair; the left end of the right positioning knob 37 is a knob structure, and its right end is a threaded rod structure. The right positioning knob 37 is coaxially installed in the threaded hole inside the right sliding positioning block 35. Rotating the right positioning knob 37 clockwise can make its right end press against the front T-shaped groove 103, thereby fixing the position of the right sliding positioning block 35. Rotating the right positioning knob 37 counterclockwise can release the locking of the right sliding positioning block 35; the left sliding positioning block 40 and the right sliding positioning block 35 are symmetrically structured left and right. The square structure at the left end of the left sliding positioning block 40 is installed in the rear T-shaped groove to form a moving pair; the left positioning knob 38 and the right positioning knob 37 are symmetrically structured left and right. The left positioning knob 38 is coaxially installed in the threaded hole inside the left sliding positioning block 40. Rotating the left positioning knob 38 clockwise can make its left end press against the rear T-shaped groove, thereby fixing the position of the left sliding positioning block 40. Rotating the left positioning knob 38 counterclockwise can release the locking of the left sliding positioning block 40.

[0029] As Figure 5 , Figure 8As shown, the main body of the swing plate 17 is a plate-like structure, with a sliding positioning groove 1701 provided at its middle position. There are two coaxially arranged and left-right symmetric stepped round holes at both ends of the swing plate 17. A right threaded hole 1702 is vertically provided above the stepped round hole at the right end, and a left threaded hole 1703 is vertically provided above the stepped round hole at the left end. The swing plate 17 is installed on the upper side of the box body 1, and the left end of the swing plate 17 is rotatably connected to the right end of the left sliding positioning block 40, and the right end of the swing plate 17 is rotatably connected to the left end of the right sliding positioning block 35. Thus, the swing plate 17 can not only move left and right but also swing up and down. The upper end of the right locking and rotating knob 36 is a knob structure, and its lower end is a threaded rod structure. The right locking and rotating knob 36 is installed in the right threaded hole 1702 to form a thread pair. The left locking and rotating knob 39 has the same structure as the right locking and rotating knob 36, and the left locking and rotating knob 39 is installed in the left threaded hole 1703 to form a thread pair. Rotate the left locking and rotating knob 39 and the right locking and rotating knob 36 clockwise so that their lower ends respectively press against the left sliding positioning block 40 and the right sliding positioning block 35, thereby locking the up and down swing of the swing plate 17.

[0030] As Figure 3 , Figure 5As shown, the lower end of the movable positioning frame 29 is a square plate 2901, the upper end of which is provided with a stepped optical axis 2902, and a through-round hole is arranged inside it. The movable positioning frame 29 is installed above the sliding positioning groove 1701 and can move left and right; the input motor 18 is installed below the sliding positioning groove 1701, and the square plate 2901 and the input motor 18 are firmly connected by four screws, and the two clamp the swing plate 17 to fix the movable positioning frame 29. After loosening the above four screws, the position of the movable positioning frame 29 can be readjusted; both the left swing arm 28 and the right swing arm 30 are plate-like structures, and the rear ends of both are rotatably installed on the optical axis 2902; two pulleys are coaxially arranged on the tower pulley 23, and the diameter of the lower pulley is larger than that of the upper pulley; the upper end of the tower pulley shaft 27 is coaxially and firmly connected to the tower pulley 23, and the tower pulley shaft 27 is coaxially and rotatably installed inside the movable positioning frame 29, and the lower end of the tower pulley shaft 27 is coaxially and firmly connected to the output shaft of the input motor 18; the upper end of the upper left shaft 31 is provided with a left pulley 20, and a square guide hole is vertically arranged inside the lower end of the upper left shaft 31. The upper left shaft 31 is rotatably installed at the front end of the left swing arm 28; the upper end of the lower left shaft 32 is a square rod structure, which is fitted with the square guide hole at the lower end of the upper left shaft 31 to form a moving pair. The lower end of the lower left shaft 32 is provided with an interface, which can be connected to the input shaft of the steering gear; the left synchronous belt 21 is installed between the left pulley 20 and the lower pulley of the tower pulley 23 to form a synchronous belt drive structure; the upper end of the upper right shaft 33 is provided with a right pulley 19, and a square guide hole is vertically arranged inside the lower end of the upper right shaft 33. The upper right shaft 33 is rotatably installed at the front end of the right swing arm 30; the upper end of the lower right shaft 34 is a square rod structure, which is fitted with the square guide hole at the lower end of the upper right shaft 33 to form a moving pair. The lower end of the lower right shaft 34 is provided with an interface, which can be connected to the input shaft of the steering gear; the right synchronous belt 22 is installed between the right pulley 19 and the upper pulley of the tower pulley 23 to form a synchronous belt drive structure; the sealing cover 11 can be made of flexible rubber to seal components such as the input motor 18, the left swing arm 28, the right swing arm 30, and the synchronous belt drive structure.

[0031] As Figure 6 , Figure 9 , Figure 10As shown, the front end of the nozzle 14 is provided with a nozzle, and the rear end of the nozzle is provided with a positioning spherical surface 1401, the diameter of the positioning spherical surface 1401 is equal to the diameter of the ball-and-socket structure inside the front and rear walls of the box body 1, and a swinging spherical surface 1402 is provided behind the positioning spherical surface 1401, and the rear end of the swinging spherical surface 1402 is provided with an interface; each of the seven ball-and-socket structures in the rear wall of the box body 1 is equipped with a nozzle 14, and each ball-and-socket structure is installed in cooperation with the corresponding positioning spherical surface 1401 to form a spherical pair; seven small ball-and-sockets are provided inside the upper side of the nozzle control plate 13, and two left-right symmetrical follower ears 1301 are provided on the lower side of the nozzle control plate 13, and the center of each follower ear 1301 The center of each of the first crankshaft wheels 41 is provided with a smooth round hole, and the seven small ball sockets on the upper side of the nozzle control plate 13 are respectively installed with the swinging spherical surfaces 1402 in the seven nozzles 14 to form a spherical pair; the right end of the first crankshaft wheel 41 is provided with a rotating shaft 4101, and the left side of the rotating shaft 4101 is coaxially provided with a nozzle pulley 4102, and the left side of the nozzle pulley 4102 is coaxially provided with a circular plate 4103, and the left side of the circular plate 4103 is provided with a cylindrical toggle shaft 4104. The rotating shaft 4101 of the first crankshaft wheel 41 is rotatably installed on the rear side wall of the box body 1, and at the same time, the toggle shaft 4104 of the first crankshaft wheel 41 is installed with the smooth round hole in the follower ear 1301 on the left to form a rotating pair and a moving pair; the second crankshaft wheel 42 has the same structure as the first crankshaft wheel 41, the rotating shaft of the second crankshaft wheel 42 is rotatably mounted on the rear wall of the box body 1, and the toggle shaft of the second crankshaft wheel 42 is matched with the smooth round hole in the follower ear 1301 on the right to form a rotating pair and a moving pair; the nozzle swing motor 45 is fixedly mounted on the inside of the rear wall of the box body 1, and a driving wheel 44 is coaxially fastened on the output shaft of the nozzle swing motor 45, the first guide wheel 43 is rotatably mounted on the rear wall of the box body 1, and is located on the left side of the nozzle swing motor 45, and the second guide wheel 46 is rotatably mounted on the rear wall of the box body 1, and is located on the right side of the nozzle swing motor 45; the nozzle swing synchronous belt 47 is installed on the first crankshaft wheel 41 and the second crankshaft wheel 42. The nozzle swing motor 45 can simultaneously drive the rotation of the first crankshaft wheel 41 and the second crankshaft wheel 42 through the nozzle swing synchronous belt 47, so that the nozzle control board 13 drives the seven nozzles 14 on the rear wall of the box body 1 to swing, and then the muddy water can be sprayed on the steering gear being tested; seven spiral hoses 10 are connected and arranged on one end of the water inlet pipe 9, and the spiral hoses 10 can be extended and twisted to a certain extent, and the other ends of the seven spiral hoses 10 are respectively connected to the interfaces at the rear ends of the seven nozzles 14 on the rear wall of the box body 1, and the other end of the water inlet pipe 9 is connected to the muddy water supply device, and the muddy water supply device can provide a muddy water mixture with a certain pressure;The side cover 5 described above is installed at the rear side of the box body 1, and the side cover 5 can shield and seal components such as the nozzle control board 13 and the spiral hose 10.

[0032] As Figure 3 , Figure 6 shown, one nozzle 14 is installed in each of the seven ball socket structures inside the front side wall of the box body 1, and each ball socket structure is installed in cooperation with the corresponding positioning spherical surface 1401 to form a spherical pair; a nozzle control board 13 is also provided on the front side wall of the box body 1, and the seven small ball sockets on the upper side of the nozzle control board 13 are respectively installed in cooperation with the swing spherical surfaces 1402 in the corresponding seven nozzles to form a spherical pair; a first crankshaft wheel, a second crankshaft wheel, a first guide wheel, a nozzle swing motor, a driving wheel, a second guide wheel, a nozzle swing synchronous belt, a water inlet pipe, and a spiral hose are also installed on the front side wall of the box body 1, and the installation positions and connection methods of the above parts are the same as those of the parts on the rear side wall of the box body 1, and the water inlet pipe on the outer side of the front side wall of the box body 1 is also communicated with the muddy water supply device; a side cover is also provided on the outer side of the front side wall of the box body 1.

[0033] Brief description of the working process of the automotive steering gear live simulation test system:

[0034] ① Fix the first steering gear 15 and the second steering gear 16 on the upper side of the mounting table 108 by bolts and keep an appropriate distance between them. Then connect the two ends of the first steering gear 15 to the first connecting frame 3 and the fourth connecting frame 8 respectively, and connect the two ends of the second steering gear 16 to the second connecting frame 4 and the third connecting frame 12 respectively.

[0035] ② Move the swing plate 17 to an appropriate position and tighten the left positioning knob 38 and the right locking knob 36 to lock the position of the swing plate 17.

[0036] ③ Rotate the tilt angle of the swing plate 17 to make the upper left shaft 31 and the upper right shaft 33 parallel to the input shafts of the two steering gears, and tighten the left locking knob 39 and the right locking knob 36 to lock the tilt angle of the swing plate 17.

[0037] ④ Adjust the position of the moving positioning frame 29, and rotate the left swing arm 28 and the right swing arm 30 to align the upper left shaft 31 and the upper right shaft 33 with the input shafts of the two steering gears respectively. Tighten the four screws between the input motor 18 and the moving positioning frame 29 to fix the position of the moving positioning frame 29.

[0038] ⑤ Extend the lower left shaft 32 and the lower right shaft 34 downward so that the interface at the lower end of the lower left shaft 32 is connected to the input shaft of the first steering gear 15, and the interface at the lower end of the lower right shaft 34 is connected to the input shaft of the second steering gear 16.

[0039] ⑥ Close the left cover 6 and the right cover 7, set the magnetic field intensity inside the four dampers 2 according to the steering gear parameters, so as to adjust the resistance values of the four dampers 2. The nozzles 14 on the front and rear sides inside the box body 1 spray the muddy water mixture while swinging, and the input motor 18 drives the test work of the two steering gears through the synchronous belt drive structure.

Claims

1. The in - situ simulation test system for an automotive steering gear includes a box body, a damper, a first connecting frame, a left cover, a right cover, a water inlet pipe, a spiral hose, a sealing cover, a nozzle control board, nozzles, a swing plate, an input motor, a tower pulley, an end connector, a screw - hole slider, a left swing arm, a moving positioning frame, a right swing arm, an upper left shaft, a lower left shaft, an upper right shaft, a lower right shaft, a right sliding positioning block, a right locking rotation knob, a right positioning knob, a left positioning knob, a left locking rotation knob, and a left sliding positioning block, and is characterized in that: On the front and rear sides inside the box body, a front T-shaped groove and a rear T-shaped groove are respectively provided. On the front and rear box walls of the box body, seven ball socket structures are respectively provided. In the middle position at the bottom of the box body, an installation platform is provided. On both the left and right sides of the installation platform, two inclined plane structures are provided. And at the bottom end of the inclined plane structure, a water filtering hole and a water outlet pipe are horizontally provided. On the front and rear side walls of the box body, seven nozzles are provided respectively. Each nozzle can spray out a muddy water mixture while swinging. On the front and rear sides of the box body, two water inlet pipes are provided. Each water inlet pipe is connected to the corresponding nozzle through seven spiral hoses. The left cover and the right cover are installed at the upper end of the box body through hinges; The three guiding round rods in the first connecting frame connect the triangular arc plate at the left end and the first circular ring frame at the right end into a whole. The first rotating frame is installed on the right side of the first circular ring frame and forms a rotating pair. The threaded hole slider is installed inside the first rotating frame and forms a moving pair. The end connector is positioned through the umbrella nut and the threaded hole slider; The cavity inside the damper is filled with magnetorheological fluid. An electromagnetic coil is provided inside its side wall. On the piston plate at the middle position of the damping guide rod, three through holes are provided. The piston plate divides the magnetorheological fluid inside the damper into left and right parts. The resistance of the damper can be adjusted by the magnetic field intensity of the electromagnetic coil; The damper is located at the central position of the first connecting frame. And the two ends of the damping guide rod are fixedly connected to the two ends of the first connecting frame; The first connecting frame is installed on the left side wall of the box body and forms a moving pair. The damper inside it is fixedly connected to the box body; The first connecting frame, the first rotating frame, the threaded hole slider, the umbrella nut, the end connector, and the damper form a set of resistance guiding and adjusting devices. Two sets of resistance guiding and adjusting devices are installed on each of the left side wall and the right side wall of the box body; Two steering machines are fixedly installed on the installation platform. The two ends of the two steering machines are respectively connected to the corresponding resistance guiding and adjusting devices; A sliding positioning groove is provided at the middle position of the swing plate. The two ends of the swing plate are respectively rotatably connected to the left sliding positioning block and the right sliding positioning block. The left sliding positioning block and the right sliding positioning block are respectively installed in the rear T-shaped groove and the front T-shaped groove and form a moving pair. The left positioning knob and the right positioning knob lock the positions of the left sliding positioning block and the right sliding positioning block respectively through a threaded structure; The left locking rotation knob and the right locking rotation knob are installed at the two ends of the swing plate and lock the inclination angle of the swing plate through a threaded structure; The moving positioning frame and the input motor are respectively installed on the upper and lower sides of the sliding positioning groove. The rear ends of the left swing arm and the right swing arm are respectively rotatably installed on the moving positioning frame. Two belt pulleys are coaxially provided on the tower belt pulley. The tower belt pulley is fixedly connected to the output shaft of the input motor through a tower shaft. The upper left shaft and the upper right shaft are respectively rotatably installed at the front ends of the left swing arm and the right swing arm. The tower belt pulley drives the rotation of the upper left shaft and the upper right shaft through two synchronous belts. The lower ends of the lower left shaft and the lower right shaft are respectively installed inside the upper left shaft and the upper right shaft and can be telescopic. The lower ends of the lower left shaft and the lower right shaft are respectively connected to the input shafts of the two steering machines.

2. The in - vehicle steering gear real - time simulation test system according to claim 1, characterized in that: A plurality of obliquely penetrating drain holes are provided below the front T-shaped groove and the rear T-shaped groove. The upper end of each drain hole communicates with the inside of the front T-shaped groove or the rear T-shaped groove, and the lower end of each drain hole communicates with the inside of the box body. The drain holes can introduce the muddy water in the side T-shaped groove into the box body.

3. The in - vehicle steering gear live simulation test system according to claim 1, characterized in that: A circular ring T-shaped groove is provided inside the right side of the first circular ring frame. Two arc-shaped sliders are provided at both ends of the left side of the first rotating frame, and the two arc-shaped sliders are installed in the circular ring T-shaped groove inside the first circular ring frame, so that the first rotating frame can rotate freely. A straight T-shaped groove is provided inside the right side of the first rotating frame.

4. The on-site simulation test system for an automotive steering gear according to claim 1, characterized in that: Two pulleys are coaxially provided on the tower pulley, and the diameter of the lower pulley is larger than that of the upper pulley.

5. The in-vehicle steering gear live simulation test system according to claim 1, characterized in that: The input motor, the left swing arm, the right swing arm and related connecting components are sealed by a sealing cover, and the sealing cover is made of flexible rubber.

6. The on-site simulation test system for an automotive steering gear according to claim 1, wherein: A nozzle is provided at the front end of the nozzle, a positioning spherical surface is provided at the rear end of the nozzle, a swinging spherical surface is provided behind the positioning spherical surface, and an interface is provided at the rear end of the swinging spherical surface.

7. The in - vehicle steering gear real - time simulation test system according to claim 1, characterized in that: Transparent glass observation windows are provided on both the left cover and the right cover.

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