CN113155487A - Commercial car a steering system test bench - Google Patents
Commercial car a steering system test bench Download PDFInfo
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- CN113155487A CN113155487A CN202110537841.6A CN202110537841A CN113155487A CN 113155487 A CN113155487 A CN 113155487A CN 202110537841 A CN202110537841 A CN 202110537841A CN 113155487 A CN113155487 A CN 113155487A
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- fixing plate
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- steering
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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 invention discloses a steering system test bed for a commercial vehicle, and relates to the technical field of steering system tests for commercial vehicles. The automatic loading device comprises a rack main body, an adjusting assembly, an adjusting device, a simulation wheel hub and a loading device group, wherein the rack main body comprises a bottom plate, two fixing assemblies and a sliding block, the adjusting assembly is fixedly connected to the sliding block and comprises a first fixing plate, a second fixing plate, a third fixing plate and a lifting device, the adjusting device is fixed to the lifting device, the simulation wheel hubs are fixedly connected to steering knuckles on two sides of a frame in a one-to-one correspondence mode, each simulation wheel hub is connected with one loading device group, and each loading device group comprises a first loading device and a second loading device; therefore, the problems that the steering system test bed in the prior art cannot simultaneously meet the requirements of a test on the overall performance of a steering system of a commercial vehicle, a test on a road spectrum of the steering system, a test on the performance of parts of a steering gear and a test on a steering pump of a real vehicle are solved.
Description
Technical Field
The invention relates to the technical field of a steering system test of a commercial vehicle, in particular to a steering system test bed of the commercial vehicle.
Background
Automobile steering systems have been regarded by various research and development enterprises and institutions in the automobile industry. The function of the steering system of the automobile is to control the driving direction of the automobile according to the intention of the driver. The steering system of an automobile is important to the driving safety of the automobile, so parts of the steering system of the automobile are called safety parts. The steering system of the automobile is a system which must be regarded as important for the safety of the automobile. In the design of the whole vehicle, strict test verification needs to be carried out on a steering system. Therefore, the experiment of the performance of the automobile steering system has very important significance for determining the design parameters of the steering gear, the size of the steering mechanism and the reliability of the steering performance.
At present, in the market of the traditional steering system test bed, the steering system test bed of a passenger car and the test bed of the steering gear parts of the passenger car are mature. However, the steering system of the commercial vehicle is more complex than that of a passenger vehicle, and only the steering gear parts of the commercial vehicle can be tested at present, but the steering system of the whole commercial vehicle cannot be tested.
Therefore, how to solve the problem that the steering system test bed in the prior art cannot simultaneously meet the requirements of the test on the overall performance of the steering system of the commercial vehicle, the test on the road spectrum of the steering system, the test on the performance of the parts of the steering gear and the test on the steering pump of the real vehicle is an important technical problem to be solved by technical personnel in the field.
Disclosure of Invention
The invention aims to provide a steering system test bed for a commercial vehicle, which solves the technical problems that the steering system test bed in the prior art cannot simultaneously meet the requirements of testing the overall performance of the steering system of the commercial vehicle, testing the road spectrum of the steering system, testing the performance of parts of a steering gear and testing the performance of a steering pump of the real vehicle. The technical effects that can be produced by the preferred technical scheme in the technical schemes provided by the invention are described in detail in the following.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention provides a commercial vehicle steering system test bed, which comprises:
the rack body comprises a bottom plate, two fixing assemblies fixed on the bottom plate side by side at intervals, and a sliding block arranged between the two fixing assemblies and connected with the fixing assemblies in a sliding manner, wherein the sliding block can freely slide along the height direction of the fixing assemblies, and is used for being fixed with a frame on one side close to the bottom plate;
the adjusting assembly is fixedly connected to the sliding block and arranged on the end face of one side far away from the bottom plate; the adjusting assembly comprises a first fixing plate fixed on the sliding block, a second fixing plate connected with the first fixing plate in a sliding manner, a third fixing plate connected with the second fixing plate in a sliding manner, and a lifting device fixed on the third fixing plate, wherein the second fixing plate can freely slide along the length direction of the first fixing plate, and the third fixing plate can freely slide along the length direction of the second fixing plate;
the adjusting device is rotatably fixed on the lifting device and can move up and down along the height direction through the lifting device, and the adjusting device is fixedly connected with a steering column on the frame;
the simulation wheel hubs are fixedly connected to the steering knuckles on two sides of the frame in a one-to-one correspondence manner;
each simulation wheel hub is connected with a group of loading device group, each loading device group comprises a first loading device and a second loading device, the first loading device is fixedly connected to the bottom of the simulation wheel hub along the longitudinal direction, and the second loading device is hinged to the side wall of the simulation wheel hub along the transverse direction.
On the basis of the technical scheme, the invention can be further improved as follows.
Further, the fixed subassembly includes fixing support, with fixing support sliding connection's connecting plate and fixing stopper on two lateral walls that the connecting plate is relative, the both ends of slider are connected perpendicularly respectively on the connecting plate, along the direction of height of fixing support's lateral wall is provided with two guide rails, and two the parallel interval of guide rail sets up, on the terminal surface of connecting plate the one-to-one be provided with be used for with guide rail matched with guide way, and the guide way sets up and is keeping away from one side of slider.
Furthermore, elevating gear includes perpendicular fixed connection and establishes guide post, the slip cover on the third fixed plate guide sleeve on the guide post, with guide sleeve screw-thread fit's lead screw and with the drive arrangement that lead screw transmission is connected, the lead screw with the parallel side by side setting of guide post.
Furthermore, adjusting device include hydraulic motor, with the slip spline that hydraulic motor transmission is connected, set up spline locking device on the slip spline, fix rotatory flange on the uide bushing, rotatable the fixing jig who fixes on the rotatory flange, last torque sensor and the grating formula angle sensor of being provided with of fixing jig.
Further, simulation wheel hub includes the outer lane bearing, sets up the inside wedge connecting piece of outer lane bearing, cover are established inside overcoat, the cover of wedge connecting piece are established the inside tight cover that expands of overcoat and fixing the end cover that compresses tightly at outer lane bearing both ends, the overcoat is used for the confession the output of knuckle stretches into, and the tight cover that expands with the output interference fit of knuckle, the one end of overcoat with screw hole on the knuckle passes through bolt fixed connection.
Furthermore, the first loading device comprises a first base and a first actuating cylinder fixed on the first base, a piston rod of the first actuating cylinder is fixedly connected with the bottom of the outer ring bearing, and the first base is slidably connected on the bottom plate.
Furthermore, the second loading device comprises a second base, a second actuating cylinder fixed on the second base, and a pull rod with one end hinged to a piston rod of the second actuating cylinder and the other end hinged to the side wall of the outer ring bearing, and the second base is slidably connected to the bottom plate.
Furthermore, the driving device comprises a motor fixedly connected to the third fixing plate and a speed reducer in transmission connection with the motor, and the speed reducer is in transmission connection with the lead screw.
Furthermore, one end of the sliding block close to the bottom plate is provided with a plurality of threaded holes.
Furthermore, the sliding block further comprises a balancing weight detachably fixed on the sliding block, and the balancing weight is made of iron.
The technical scheme provided by the application comprises the following beneficial effects:
in the technical scheme provided by the invention, the commercial vehicle steering system test bed comprises a rack main body, an adjusting assembly, an adjusting device, a simulation wheel hub and a loading device group, wherein the rack main body comprises a bottom plate, two fixing assemblies and a sliding block, the two fixing assemblies are fixed on the bottom plate at intervals in parallel, two ends of the sliding block are connected between the two fixing assemblies in a sliding manner, the sliding block can freely slide along the height direction of the fixing assemblies, one end of the sliding block close to the bottom plate is used for fixing with a vehicle frame, the adjusting assembly is fixedly connected on the sliding block, the adjusting assembly is arranged on the end face of one side far away from the bottom plate and comprises a first fixing plate, a second fixing plate, a third fixing plate and a lifting device, the first fixing plate is fixed on the sliding block, the second fixing plate is connected with the first fixing plate in a sliding manner, elevating gear fixes on the third fixed plate, the second fixed plate can freely slide along the length direction of first fixed plate, the third fixed plate can freely slide along the length direction of second fixed plate, adjusting device rotatably fixes on elevating gear, and adjusting device can reciprocate along the direction of height through elevating gear, adjusting device be used for with the frame on steering column fixed connection, simulation wheel hub one-to-one fixed connection is on the knuckle of frame both sides, each simulation wheel hub all is connected with a set of loading device group, and every group loading device group all includes a first loading device and a second loading device, first loading device is along vertical fixed connection in simulation wheel hub's bottom, second loading device is along transversely articulating at simulation wheel hub's lateral wall. With the arrangement, when the commercial vehicle steering system test bed in the embodiment is used for testing, the bottom of the sliding block is fixedly mounted with a test frame, the output end of the adjusting device is fixedly connected with the input end of a steering system of the frame, the simulation wheel hubs are respectively mounted on steering knuckles on two sides of the steering system of the frame, the first loading device is directly connected with the simulation wheel hub and mounted at the bottom of the simulation wheel hub, and the second loading device is directly hinged with the simulation wheel hub and mounted on the side wall of the simulation wheel hub; therefore, the problems that the steering system test bed in the prior art cannot simultaneously meet the requirements of a test on the overall performance of a steering system of a commercial vehicle, a test on a road spectrum of the steering system, a test on the performance of parts of a steering gear and a test on a steering pump of a real vehicle are solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an integral steering system test bed of a commercial vehicle in the embodiment of the invention;
FIG. 2 is a front view of a steering system test bed of a commercial vehicle according to an embodiment of the invention;
FIG. 3 is a partially enlarged view of a steering system test bed of a commercial vehicle according to an embodiment of the invention;
FIG. 4 is a partially enlarged view of a steering system test bed of a commercial vehicle according to an embodiment of the invention;
FIG. 5 is a top view of a partial structure of a steering system test bed of a commercial vehicle in the embodiment of the invention;
FIG. 6 is a partially enlarged view of a test stand of a steering system of a commercial vehicle according to an embodiment of the present invention.
Reference numerals:
1. a base plate; 2. a fixing assembly; 3. a slider; 4. a frame; 5. an adjustment assembly; 6. a first fixing plate; 7. a second fixing plate; 8. a third fixing plate; 9. a lifting device; 10. an adjustment device; 11. simulating a hub; 12. a first loading device; 13. a second loading device; 14. a fixed support; 15. a connecting plate; 16. a limiting block; 17. a guide rail; 18. a guide groove; 19. a guide post; 20. a guide sleeve; 21. a lead screw; 22. a drive device; 23. a hydraulic motor; 24. a sliding spline; 25. a spline locking device; 26. rotating the flange; 27. fixing the clamp; 28. a first base; 29. a first cylinder; 30. a second base; 31. a second cylinder; 32. a pull rod.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
The specific embodiment aims to provide a steering system test bed for a commercial vehicle; therefore, the problems that the steering system test bed in the prior art cannot simultaneously meet the requirements of a test on the overall performance of a steering system of a commercial vehicle, a test on a road spectrum of the steering system, a test on the performance of parts of a steering gear and a test on a steering pump of a real vehicle are solved.
Hereinafter, embodiments will be described with reference to the drawings. The embodiments described below do not limit the contents of the invention described in the claims. The entire contents of the configurations shown in the following embodiments are not limited to those required as solutions of the inventions described in the claims.
Referring to fig. 1 to 6, the present embodiment provides a test bed for a steering system of a commercial vehicle, including a rack main body, an adjusting assembly 5, an adjusting device 10, a simulation wheel hub 11 and a loading device set, where the rack main body includes a bottom plate 1, two fixing assemblies 2 and a slider 3, the two fixing assemblies 2 are fixed on the bottom plate 1 at intervals side by side, two ends of the slider 3 are slidably connected between the two fixing assemblies 2, the slider 3 can freely slide along the height direction of the fixing assemblies 2, one end of the slider 3 close to the bottom plate 1 is used for fixing with a vehicle frame 4, the adjusting assembly 5 is fixedly connected to the slider 3, the adjusting assembly 5 is disposed on an end surface of one side far from the bottom plate 1, the adjusting assembly 5 includes a first fixing plate 6, a second fixing plate 7, a third fixing plate 8 and a lifting device 9, the first fixing plate 6 is fixed on the slider 3, the second fixing plate 7 is slidably connected with the first fixing plate 6, the third fixing plate 8 is slidably connected with the second fixing plate 7, the lifting device 9 is fixed on the third fixing plate 8, the second fixing plate 7 can freely slide along the length direction of the first fixing plate 6, the third fixing plate 8 can freely slide along the length direction of the second fixing plate 7, the adjusting device 10 is rotatably fixed on the lifting device 9, the adjusting device 10 can move up and down along the height direction through the lifting device 9, the adjusting device 10 is used for being fixedly connected with a steering column on the frame 4, the simulation wheel hubs 11 are fixedly connected on steering knuckles on two sides of the frame 4 in a one-to-one correspondence manner, each simulation wheel hub 11 is connected with a group of loading devices, each group of loading devices comprises a first loading device 12 and a second loading device 13, the first loading device 12 is fixedly connected to the bottom of the simulation wheel hub 11 along the longitudinal direction, the second loading means 13 are hinged in the lateral direction to the side wall of the dummy hub 11.
With such arrangement, when the test bed of the steering system of the commercial vehicle in the embodiment is used for testing, the bottom of the sliding block 3 is used for being fixedly installed with the test frame 4, the output end of the adjusting device 10 is fixedly connected with the input end of the steering system of the frame 4, the simulation wheel hubs 11 are respectively installed on the steering knuckles on the two sides of the steering system of the frame 4, the first loading device 12 is directly connected with the simulation wheel hub 11 and installed at the bottom of the simulation wheel hub 11, and the second loading device 13 is directly hinged with the simulation wheel hub 11 and installed on the side wall of the simulation wheel hub 11; therefore, the problems that the steering system test bed in the prior art cannot simultaneously meet the requirements of a test on the overall performance of a steering system of a commercial vehicle, a test on a road spectrum of the steering system, a test on the performance of parts of a steering gear and a test on a steering pump of a real vehicle are solved.
As an optional embodiment, the fixing assembly 2 includes a fixing support 14, a connecting plate 15 and a limiting block 16, the connecting plate 15 is slidably connected to the fixing support 14, the limiting block 16 is fixed on two opposite side walls of the connecting plate 15 by bolts, two ends of the slider 3 are respectively and vertically welded on the connecting plate 15, two guide rails 17 are arranged along the height direction of the side walls of the fixing support 14, the two guide rails 17 are arranged in parallel and at intervals, guide grooves 18 for matching with the guide rails 17 are arranged on the end surface of the connecting plate 15 in a one-to-one correspondence manner, and the guide grooves 18 are arranged on one side far away from the slider 3. So set up, slider 3 can slide from top to bottom along fixing support 14's direction of height, can satisfy not unidimensional size and wait that test frame 4 places, increases flexibility and application range that commercial car a steering system test bench used.
As an optional embodiment, the lifting device 9 includes a guide post 19, a guide sleeve 20, a lead screw 21 and a driving device 22, the guide post 19 is vertically and fixedly connected to the third fixing plate through a bolt, the guide sleeve 20 is slidably sleeved on the guide post 19, the lead screw 21 penetrates through the guide sleeve 20 and is in threaded fit with the guide sleeve 20, the driving device 22 is in transmission connection with the lead screw 21, and the lead screw 21 and the guide post 19 are arranged in parallel and side by side. So set up, drive arrangement 22 starts and can drive lead screw 21 and rotate, and the external screw thread on lead screw 21 cooperatees with the internal thread in the screw hole on the uide bushing 20, can make uide bushing 20 slide from top to bottom along guide post 19 to drive adjusting device 10 and carry out position control along the Z direction.
In a more specific embodiment, the adjusting device 10 includes a hydraulic motor 23, a sliding spline 24, a spline locking device 25, a rotating flange 26 and a fixing clamp 27, the sliding spline 24 is in transmission connection with the hydraulic motor 23, the spline locking device 25 is disposed on the sliding spline 24, the rotating flange 26 is fixed on the guide sleeve 20 through bolts, the fixing clamp 27 is rotatably fixed on the rotating flange 26, and a torque sensor and a grating angle sensor are disposed on the fixing clamp 27. So arranged, the hydraulic motor 23 is coaxially connected with the steering gear spline and is responsible for applying a forward or reverse rotational load to the steering gear. And (3) carrying out closed-loop control by using a steering wheel rotation angle or rotation torque as a control target signal in a steering gear test standard or an actual vehicle road spectrum by using an angle sensor and a torque sensor. In the present embodiment, a sliding spline 24 is used, and the input end driving device 22 can be quickly detached without affecting the installation of the steering wheel of the real vehicle under the condition that the installation state of the test piece is not changed. The output end of the steering wheel driving system is provided with the elastic sheet coupler, so that the input end of the steering wheel and the steering column are quickly and reliably centered, additional torque is avoided, and the mounting positions of the steering wheel, the steering column and a steering gear on the rack are consistent with the actual vehicle state.
As an alternative embodiment, the hydraulic motor 23 in this embodiment is preferably a servo hydraulic axial vane motor, which has the advantages of very low drain leakage as a steering input, allowing accurate low speed control, no internal clearance, a typical separation pressure of 0.5Bar, 360 degree rotor pressure balance, no metal-to-metal contact, full bearing pressure lubrication, long service life, high starting torque, and no need for additional cooling.
As an optional implementation manner, the simulation wheel hub 11 includes an outer ring bearing, a wedge-shaped connector, an outer sleeve, an expansion sleeve and a compression end cover, the wedge-shaped connector is disposed inside the outer ring bearing, the outer sleeve is sleeved inside the wedge-shaped connector, the expansion sleeve is sleeved inside the outer sleeve, and two ends of the outer ring bearing are both provided with the compression end cover. The outer sleeve is used for extending the output end of the steering knuckle, one end of the outer sleeve is fixedly connected with a threaded hole in the steering knuckle through a bolt, and the expansion sleeve is in interference fit with the output end of the steering knuckle. So set up, simulation wheel hub 11 is installed on the knuckle of a steering system both sides through the bolt respectively, through the effort of exerting level and vertical direction to simulation wheel hub 11, realizes the required operating mode in steering gear test standard and the real car way spectrum.
In a more specific embodiment, the first loading device 12 includes a first base 28 and a first cylinder 29, the first cylinder 29 is fixedly connected to the first base 28 by bolts, a piston rod of the first cylinder 29 is fixedly connected to a bottom portion of the outer ring bearing by welding, and the first base 28 is slidably connected to the base plate 1. In this arrangement, one end of the first cylinder 29 is mounted on the movable base through the joint bearing, and the other end of the first cylinder 29 is directly and fixedly connected with the simulation hub 11. The vertical acting force provided by the simulation wheel hub 11 can be provided by the extension and contraction of the piston rod of the first acting cylinder 29, and the test condition of the longitudinal stress of the simulation wheel hub 11 is met. The first loading device 12 directly excites the simulation hub 11 to push the steering knuckle of the steering gear to move in the vertical direction, and the ground vertical load applied to the steering system in the real road condition is simulated. A vertical accelerometer is arranged on the test bed simulation hub 11 and used for reproducing road spectrum vertical target signals and performing closed-loop control on a vertical loading device.
In a more specific embodiment, the second loading device 13 includes a second base 30, a second cylinder 31 and a pull rod 32, the second cylinder 31 is fixedly connected to the second base 30 through a bolt, one end of the pull rod 32 is hinged and fixed to a piston rod of the second cylinder 31, the other end of the pull rod 32 is hinged and fixed to a side wall of the outer ring bearing, and the second base 30 is slidably connected to the bottom plate 1. With the arrangement, the horizontal acting force provided by the extension and contraction of the piston rod of the second actuating cylinder 31 for the simulation hub 11 meets the test condition of simulating the transverse stress of the hub 11. The second loading device 13 is connected with one side of the simulation hub 11 through a connecting rod, and the horizontal loading actuator stretches and retracts to drive the simulation hub 11 to rotate in the vertical axis direction, so that the lateral load of the steering system is simulated. A force sensor is arranged at a connecting rod of the lateral loading device, and parts at a steering knuckle of the steering gear are also provided with strain gauges which can be used as control target signals of the horizontal loading device to reproduce the test standard of the steering gear or the working conditions required in a road spectrum of an actual vehicle.
As an alternative embodiment, the first cylinder 29 and the second cylinder 31 in this embodiment are preferably both strong, fatigue-designed double-stick actuators. In order to meet the requirement of distortion degree of the system, the actuator cannot adopt a high-pressure sealing ring. And the two ends of the actuator are provided with hydrostatic bearings to ensure that the internal resistance of the actuator can be ignored even under the premise of side load. The hydrostatic bearing actuator adopts a fatigue design, the continuous fault-free working time can reach 50x 108 cycles, and the maintenance-free period of the main component can reach ten years. The two ends of the actuator are provided with hydraulic buffer zones for pressure control, so that energy is guaranteed to be absorbed under controllable acceleration, and the actuator and the test piece are protected from being impacted.
In a more specific embodiment, the driving device 22 includes a motor and a speed reducer, a base of the motor is fixedly connected to the third fixing plate through a bolt, the speed reducer is in transmission connection with an output shaft of the motor, and the speed reducer is in transmission connection with the lead screw 21. So set up, the motor provides power for lead screw 21's rotation, and the reduction gear transmission is connected between motor and lead screw 21, and the reduction gear has played the effect that matches the rotational speed with lead screw 21, transmission power and transmission torque.
As an alternative embodiment, the slider 3 is provided with a plurality of threaded holes at one end near the base plate 1. So set up, slider 3 has played the effect of simulation frame 4, adopts the design of modularization box, and slider 3's bottom is provided with the screw hole that is used for the installation of experimental frame 4, and the bolt on the anchor clamps can be fixed with commercial car a steering system's girder and slider 3 with the cooperation of screw hole.
As optional implementation mode, the slider 3 is last to dismantle fixedly connected with balancing weight, and the material of balancing weight can be set for according to specific service environment, and the material of balancing weight is preferred iron in this embodiment. Because the iron has heavy weight and high strength, and compared with other metals, the iron has lower price, and the production and manufacturing cost is reduced. So set up, the balancing weight can increase slider 3's weight, and the size of balancing weight can specifically be set for according to the experimental demand of different motorcycle types, so can make slider 3 play the effect of the simulation frame 4 of satisfying different motorcycle types, increases flexibility and the application range that commercial car a steering system test bench used.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. The utility model provides a commercial car a steering system test bench which characterized in that includes:
the rack comprises a rack main body and a rack main body, wherein the rack main body comprises a bottom plate (1), two fixing assemblies (2) fixed on the bottom plate (1) side by side at intervals, and a sliding block (3) arranged between the two fixing assemblies (2) and connected with the fixing assemblies (2) in a sliding manner, the sliding block (3) can freely slide along the height direction of the fixing assemblies (2), and one side, close to the bottom plate (1), of the sliding block (3) is used for fixing with a vehicle frame (4);
the adjusting component (5) is fixedly connected to the sliding block (3), and the adjusting component (5) is arranged on the end face of one side far away from the bottom plate (1); the adjusting assembly (5) comprises a first fixing plate (6) fixed on the sliding block (3), a second fixing plate (7) connected with the first fixing plate (6) in a sliding manner, a third fixing plate (8) connected with the second fixing plate (7) in a sliding manner, and a lifting device (9) fixed on the third fixing plate (8), wherein the second fixing plate (7) can freely slide along the length direction of the first fixing plate (6), and the third fixing plate (8) can freely slide along the length direction of the second fixing plate (7);
the adjusting device (10) is rotatably fixed on the lifting device (9), the adjusting device (10) can move up and down along the height direction through the lifting device (9), and the adjusting device (10) is fixedly connected with a steering column on the vehicle frame (4);
the simulation wheel hubs (11) are fixedly connected to the steering knuckles on the two sides of the frame (4) in a one-to-one correspondence manner;
each simulation hub (11) is connected with one loading device group, each loading device group comprises a first loading device (12) and a second loading device (13), the first loading device (12) is fixedly connected to the bottom of the simulation hub (11) along the longitudinal direction, and the second loading device (13) is hinged to the side wall of the simulation hub (11) along the transverse direction.
2. The steering system test bed for the commercial vehicle according to claim 1, wherein the fixed assembly (2) comprises a fixed support (14), a connecting plate (15) connected with the fixed support (14) in a sliding manner, and limit blocks (16) fixed on two opposite side walls of the connecting plate (15), two ends of the sliding block (3) are respectively and vertically connected to the connecting plate (15), two guide rails (17) are arranged along the height direction of the side walls of the fixed support (14), the two guide rails (17) are arranged in parallel at intervals, guide grooves (18) matched with the guide rails (17) are correspondingly arranged on the end surface of the connecting plate (15) one by one, and the guide grooves (18) are arranged on one side far away from the sliding block (3).
3. The commercial vehicle steering system test bed according to claim 1, wherein the lifting device (9) comprises a guide post (19) vertically and fixedly connected to the third fixing plate (8), a guide sleeve (20) slidably sleeved on the guide post (19), a lead screw (21) in threaded fit with the guide sleeve (20), and a driving device (22) in transmission connection with the lead screw (21), and the lead screw (21) and the guide post (19) are arranged in parallel and side by side.
4. The steering system test bed of the commercial vehicle according to claim 3, wherein the adjusting device (10) comprises a hydraulic motor (23), a sliding spline (24) in transmission connection with the hydraulic motor (23), a spline locking device (25) arranged on the sliding spline (24), a rotating flange (26) fixed on the guide sleeve (20), and a fixing clamp (27) rotatably fixed on the rotating flange (26), wherein a torque sensor and a grating angle sensor are arranged on the fixing clamp (27).
5. The commercial vehicle steering system test bed according to claim 1, wherein the simulation wheel hub (11) comprises an outer ring bearing, a wedge-shaped connecting piece arranged in the outer ring bearing, a sleeve arranged in the wedge-shaped connecting piece, an expansion sleeve arranged in the sleeve and compression end covers fixed at two ends of the outer ring bearing, wherein the sleeve is used for allowing an output end of the steering knuckle to extend into the outer ring bearing, the expansion sleeve is in interference fit with the output end of the steering knuckle, and one end of the sleeve is fixedly connected with a threaded hole in the steering knuckle through a bolt.
6. The steering system test bench for commercial vehicles according to claim 5, characterized in that the first loading device (12) comprises a first base (28) and a first actuating cylinder (29) fixed on the first base (28), a piston rod of the first actuating cylinder (29) is fixedly connected with the bottom of the outer ring bearing, and the first base (28) is slidably connected on the bottom plate (1).
7. The commercial vehicle steering system test stand according to claim 6, characterized in that the second loading device (13) comprises a second base (30), a second actuating cylinder (31) fixed on the second base (30), and a pull rod (32) with one end hinged on a piston rod of the second actuating cylinder (31) and the other end hinged on the side wall of the outer ring bearing, wherein the second base (30) is slidably connected on the bottom plate (1).
8. The test stand of a steering system of a commercial vehicle according to claim 3, characterized in that the drive device (22) comprises a motor fixedly connected to the third fixing plate (8) and a speed reducer in transmission connection with the motor, the speed reducer being in transmission connection with the screw (21).
9. The steering system test stand of a commercial vehicle according to claim 1, characterized in that the slide (3) is provided with a plurality of threaded holes at one end close to the base plate (1).
10. The commercial vehicle steering system test bed according to claim 1, further comprising a counterweight block detachably fixed on the sliding block (3), wherein the counterweight block is made of iron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110537841.6A CN113155487B (en) | 2021-05-18 | 2021-05-18 | Commercial car a steering system test bench |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110537841.6A CN113155487B (en) | 2021-05-18 | 2021-05-18 | Commercial car a steering system test bench |
Publications (2)
| Publication Number | Publication Date |
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| CN113155487A true CN113155487A (en) | 2021-07-23 |
| CN113155487B CN113155487B (en) | 2022-05-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110537841.6A Active CN113155487B (en) | 2021-05-18 | 2021-05-18 | Commercial car a steering system test bench |
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