CN213676959U - Fatlute model car - Google Patents

Abstract

The utility model discloses a fatlute model car, include: the device comprises a chassis assembly, an engine compartment assembly, a vehicle body framework, an electric control assembly, a fan rotating speed measuring device, a vehicle body covering part and a wheel mounting assembly. An adjustable inner space is formed in the vehicle body framework, electric parts, wiring harnesses and pipelines are accommodated, and lifting mechanism mounting points are formed on the periphery of the vehicle body framework. The electric control assembly comprises a lifting mechanism, a brake mechanism, a steering mechanism, a controller, an operator, a driving system and a storage battery, the controller controls the driving mechanism according to an operation instruction from the operator, the driving mechanism drives the lifting mechanism, the brake mechanism and the steering mechanism to act, and the storage battery supplies power for the controller, the operator and the driving system. The fan speed measurement device measures the speed of the fan in the nacelle assembly. The automobile body covering part covers the automobile body framework, the outer contour of the automobile body covering part is processed according to the outer contour of the real automobile, and the automobile body covering part is provided with a seam and a cavity corresponding to the outer contour of the real automobile. The wheel mounting assembly includes a hub spacer.

Description

Fatlute model car

Technical Field

The utility model relates to an automobile parts field, more specifically say, relate to aerodynamic performance test's model car.

Background

In the existing automobile aerodynamic development process, 1: the 1 clay model is widely applied to wind tunnel tests. Generally, the construction of the oil sludge model is based on a prototype vehicle chassis, the structure of an engine compartment is reserved, a vehicle body framework is built by square steel on the basis, a wood plate and foam are paved on the framework, and then the whole piled oil sludge is milled. The headstock and the tailstock generally adopt ABS sample pieces so as to facilitate quick replacement of the model. The clay model sample car has a series of advantages of convenient replacement and modeling, repeatable test and the like. However, a series of use problems still exist in the actual wind tunnel test process:

1) the existing national 5, national 6 and WLTP and enterprise internal research and development standards have different requirements on the body posture of the passenger vehicle, and in order to meet different test standards, the body height of the oil sludge model sample vehicle needs to be adjusted in the test process. The traditional clay model sample car can only adjust the posture of the car body to the height required by the regulations by means of auxiliary equipment, weight increase and the like, the process is long in time consumption and poor in adjustment precision, and the consistency of front and back tests is difficult to guarantee.

2) The direction of the oil sludge model sample vehicle needs to be adjusted and the loading and unloading needs to be promoted by a trailer or manpower in the transportation process, the loading consumes long time, and the transportation potential safety hazard exists. Meanwhile, the wind tunnel test is carried out indoors and is limited by the size of a field, and the direction of the wind tunnel test cannot be adjusted by using a trailer, so that the oil sludge model sample car is difficult to enter a laboratory, and the test efficiency is influenced.

3) The engine compartment cooling air flow is an important factor influencing the engine cooling, the excessive cooling flow can increase the wind resistance, and the wind resistance optimization measure can also influence the cooling air intake quantity. The traditional oil sludge vehicle cannot monitor the cooling air flow in the wind tunnel test process, cannot obtain the influence of the wind resistance optimization measure on the cooling air flow in the test, needs to check the cooling performance of the engine again through means such as simulation and the like after the test is finished, and often causes the contradiction between the wind resistance optimization measure and the cooling air flow demand.

4) The wind tunnel test results of batch vehicles and clay model sample vehicles are compared to find that some vehicle body seam roads have great influence on the wind resistance of the whole vehicle. The traditional clay model does not consider the seams and the related internal structures in the construction process, so that the influence of the vehicle body seams cannot be evaluated in the early stage of a project, and the wind resistance optimization potential cannot be excavated.

5) The aerodynamic resistance of the wheel assembly accounts for about 30% of the aerodynamic resistance of the whole vehicle, so a large number of wind tunnel tests need to be carried out on the wheels to optimize the wind resistance. The existing hub wind resistance scheme is that wind resistance evaluation and optimization are firstly carried out through simulation, a hub sample is used for testing in the middle and later periods of a project, optimization space is limited due to the fact that batch nodes are close to, a new round of simulation test optimization iteration cannot be completed, and the optimization effect is poor. Meanwhile, for a batch vehicle, various wheel assemblies are generally matched, the size and the shape of a wheel hub are different, the manufacturing cost of a sample piece is high, and the efficiency is low.

6) The China automobile market is mature day by day, and customers pay more attention to the driving safety of a new product; in order to meet the requirement of driving safety in rainy days, an aerodynamic department needs to verify the water management performance of the side window glass and the outer rearview mirror of the driver through a test, the test is mainly carried out through a sample car in the technical scheme at the present stage, but the delivery time of the sample car is late, the freezing time of the model is often missed, the performance optimization of the relevant side window glass and the rearview mirror car body with large pollution resistance is difficult to enter mass production, and therefore the water management test through an oil sludge model car is required.

SUMMERY OF THE UTILITY MODEL

According to the utility model discloses an embodiment provides a fatlute model car, include: the device comprises a chassis assembly, an engine compartment assembly, a vehicle body framework, an electric control assembly, a fan rotating speed measuring device, a vehicle body covering part and a wheel mounting assembly. The chassis assembly comprises a chassis and chassis parts, the chassis and chassis parts are real vehicle chassis and real vehicle chassis parts, and the chassis and chassis parts are assembled in the same way as a real vehicle. The engine compartment assembly includes the engine compartment components of the real vehicle, and is mounted in the engine compartment of the chassis in the same manner as the real vehicle. The automobile body skeleton is installed on the chassis, forms the inner space that can adjust in the automobile body skeleton, and the inner space holds electrical component, pencil and pipeline, forms the elevating system mounting point on the periphery of automobile body skeleton. The electric control assembly comprises a lifting mechanism, a brake mechanism, a steering mechanism, a controller, an operator, a driving system and a storage battery, wherein the lifting mechanism and the brake mechanism are connected with wheels, the lifting mechanism is further connected to a mounting point of the lifting mechanism on the vehicle body framework, the steering mechanism is connected with front wheels, the driving system is connected to the lifting mechanism, the brake mechanism and the steering mechanism, the controller is connected with the driving system and the operator, the controller controls the driving mechanism according to an operation instruction from the operator, the driving mechanism drives the lifting mechanism, the brake mechanism and the steering mechanism to act, and the storage battery supplies power to the controller, the operator and the driving system. The fan speed measurement device measures the speed of the fan in the nacelle assembly. The automobile body covering part covers the automobile body framework, the outer contour of the automobile body covering part is processed according to the outer contour of the real automobile, and the automobile body covering part is provided with a seam and a cavity corresponding to the outer contour of the real automobile. The wheel mounting assembly includes a hub pad through which the wheel is mounted to the axle.

In one embodiment, a vehicle body frame includes: a main frame, a partition, a sliding drawer and a lifting mechanism mounting member. The main frame is a cuboid structure formed by welding longitudinal beams, cross beams and vertical beams. The baffle is installed in the main frame, and the baffle passes through bolted connection with the main frame, and the several cabin is separated into with the main frame to the baffle, and the size in each cabin can be adjusted to the position of adjustment baffle to make the interior space that forms in the automobile body skeleton and to adjust, have the wiring hole that supplies pencil and pipeline to pass through on the baffle. The sliding drawer is arranged at the tail part of the main frame, can be opened and closed in a sliding mode, and accommodates electrical components. The lifting mechanism mounting piece is mounted on the main frame, the position of the lifting mechanism mounting piece corresponds to the position of the wheel, and the lifting mechanism mounting piece forms a lifting mechanism mounting point.

In one embodiment, the sliding drawer includes therein: the device comprises a controller bracket, a storage battery bracket, a power switch bracket and an operator bracket.

In one embodiment, the vehicle body framework further comprises a molding bracket which is arranged on the periphery of the main framework, and a plurality of molding brackets extend from the rectangular main framework to the periphery according to the outline of the real vehicle.

In one embodiment, the lifting mechanism is a hydraulic rod, the hydraulic rod is arranged in the vertical direction, the top of the hydraulic rod is connected to a lifting mechanism mounting point on the vehicle body framework, the bottom of the hydraulic rod is connected to an axle for mounting wheels, and the hydraulic rod stretches and retracts for lifting adjustment. The steering mechanism is a real vehicle steering rod which is connected with the front wheel. The brake mechanism comprises an electronic mechanical caliper and a brake disc, the brake disc is arranged on a wheel, and the controller controls the electronic mechanical caliper to clamp the brake disc to execute brake action.

In one embodiment, the driving system is a hydraulic pump, the hydraulic pump is shared by the lifting mechanism and the steering mechanism, and the hydraulic rod and the steering rod of the real vehicle are driven by the hydraulic pump; or the driving system comprises a hydraulic pump and a power-assisted motor, the hydraulic rod is driven by the hydraulic pump, and the steering rod of the real vehicle is driven by the power-assisted motor.

In one embodiment, a fan speed measurement device includes: the device comprises an optical fiber probe, a reflector plate and a light ray receiving and transmitting device. The fiber optic probe is mounted on the housing of the fan, the fiber optic probe being aligned with the blades of the fan. The reflector plate is adhered to the blade of the fan and covers the projection of the optical fiber probe on the blade. The light receiving and transmitting device is connected to the optical fiber probe, transmits light to the blade through the optical fiber probe, receives light reflected by the reflector plate through the optical fiber probe, and calculates the rotating speed of the fan according to the received reflected light.

In one embodiment, the body panel includes sludge forming a roof structure and a rear cover structure, foam, and an ABS plastic forming a rear tail, the sludge forming a seam and a cavity at a junction of the rear tail and the roof.

In one embodiment, for a new platform vehicle type, the hub cushion block is in a plane shape, the hub cushion block is provided with mounting disc mounting holes and hub mounting holes which are distributed at intervals, the mounting disc mounting holes and the hub mounting holes are arranged on the same circumference, the mounting disc mounting holes are stepped holes, the hub mounting holes are through holes, and the thickness of the hub cushion block is 20 mm-30 mm. For the existing platform vehicle type, the middle of the hub cushion block is of a boss structure, mounting holes are uniformly distributed along the circumference on the hub cushion block, and the thickness of the hub cushion block is 2-10 mm.

In one embodiment, the sludge model vehicle further comprises a water management kit replacing a portion of the body cover for performing a water management test, the water management kit comprising: the automobile windscreen wiper comprises a windscreen wiper component, a front windscreen, an A column, a roof, a triangular window, a rearview mirror, side window glass and a sealing element, wherein a driving component of the windscreen wiper is installed in an inner space of an automobile body framework, the front windscreen wiper, the side window glass, a rearview mirror lens and the windscreen wiper are parts of an actual automobile, and a rearview mirror base, a rearview mirror housing and the A column are ABS plastic parts.

The utility model discloses a fatlute model car has following advantage:

in order to meet the requirement of high adjustment in the test, an electric control hydraulic system is added, and a suspension of an original vehicle chassis is modified, so that the posture of a model vehicle body is adjusted more conveniently and more conveniently, and the requirement of high precision can be met.

In order to improve the transportation safety of the oil sludge model vehicle and the loading convenience in the test, the requirements of steering and braking functions are provided for the oil sludge model vehicle. A batch vehicle steering system is improved, oil sludge steering is achieved through electric control operation, and a batch vehicle brake mechanism is arranged on the oil sludge vehicle.

In order to obtain the influence of the wind resistance optimization measure on the cooling air flow, a rotating speed sensor is arranged at a fan of the cooling module of the oil sludge model sample car to monitor the variation trend of the cooling air flow.

In order to research the influence of the seam road on the wind resistance, the position, the length and the cavity structure of the actual seam road are referred, and the corresponding seam road and the corresponding cavity are designed before the oil sludge model sample is machined.

The hub platform capable of replacing the hub model and adjusting the ET value is carried on, the hub model can be replaced quickly on the premise that the size of the wheel is correct, and wind resistance optimization of the hub in the early stage of the project is achieved.

In the stage of water management performance test transformation of the clay model sample car, test related parts such as a front windshield, a side window glass, a rearview mirror and the like of the model are replaced by real car parts, an electric wiper module is installed, the state of a real car in rainy days is simulated, and the visual field of a driver in rainy days is evaluated and optimized in the early stage of a project.

Drawings

Fig. 1a discloses a structure diagram of a car body frame in a clay car model according to an embodiment of the present invention.

Fig. 1b discloses a structure diagram of a sliding drawer of a body frame in a clay vehicle model according to an embodiment of the present invention.

Fig. 2a and 2b disclose schematic diagrams of an electronic control assembly in a clay vehicle model according to an embodiment of the present invention.

Fig. 3 discloses a schematic control logic diagram of an electronic control component in the clay vehicle model according to an embodiment of the present invention.

Fig. 4 discloses a structure diagram of the lifting mechanism of the electric control assembly in the clay vehicle model according to an embodiment of the present invention.

Fig. 5 discloses a structure diagram of a steering mechanism of an electronic control assembly in a clay vehicle model according to an embodiment of the present invention.

Fig. 6 discloses a structure diagram of a fan rotation speed measuring device in a fatlute truck model according to an embodiment of the present invention.

Fig. 7a and 7b disclose a comparison structure diagram of the body covering part and the outer contour of the real vehicle in the clay vehicle model according to an embodiment of the present invention.

Fig. 8a, 8b, 8c and 8d disclose a block diagram of a wheel mounting assembly in a clay car model according to an embodiment of the invention.

Fig. 9a and 9b disclose a block diagram of a water management kit in a clay car model according to an embodiment of the invention.

Detailed Description

The utility model provides a fatlute model car can satisfy aerodynamic's test needs, can also carry out the water management test. The oil sludge model car comprises: the device comprises a chassis assembly, an engine compartment assembly, a vehicle body framework, an electric control assembly, a fan rotating speed measuring device, a vehicle body covering part and a wheel mounting assembly.

The chassis assembly comprises a chassis and chassis parts, the chassis and chassis parts are real vehicle chassis and real vehicle chassis parts, and the chassis and chassis parts are assembled in the same way as a real vehicle.

The engine compartment assembly includes the engine compartment components of the real vehicle, and is mounted in the engine compartment of the chassis in the same manner as the real vehicle. Chassis and engine compartment part, the utility model discloses a fatlute model car is similar with prior art's fatlute model car, all adopts real car spare part, arranges according to the same mode with the real car.

The vehicle body frame 100 is mounted on the chassis, an adjustable internal space is formed in the vehicle body frame 100, the internal space accommodates electrical parts, wiring harnesses and pipes, and a lifting mechanism mounting point is formed on the outer periphery of the vehicle body frame. Fig. 1a discloses a structure diagram of a car body frame in a clay car model according to an embodiment of the present invention. Referring to fig. 1a, a vehicle body frame 100 includes: a main frame 101, a partition 102, a slide drawer 103, a lifting mechanism mounting member 104, and a molding bracket 105. The main frame 101 is a rectangular parallelepiped structure formed by welding longitudinal beams, cross beams, and vertical beams. The partition plate 102 is installed in the main frame 101, and the partition plate 102 is connected to the main frame 101 through bolts, in the illustrated embodiment, if the installation position of the partition plate is exactly corresponding to the cross beam or the vertical beam, the partition plate 102 may be connected to the longitudinal beam, the cross beam, and the vertical beam through bolts, respectively, the installation position of the partition plate is not corresponding to the cross beam or the vertical beam, and the partition plate 102 may also be connected to the longitudinal beam only through bolts. The main frame 101 is divided into a plurality of cabins by the plurality of partition plates 102, the size and the number of the cabins can be adjusted according to needs, the number of the cabins can be adjusted by setting the number of the partition plates, and the size of each cabin can be adjusted by adjusting the positions of the partition plates, so that an adjustable inner space is formed in the vehicle body framework 100. In the illustrated embodiment, the bulkhead 102 has a wiring hole 121 through which the wiring harness and the piping pass. A slide drawer 103 is installed at the rear of the main frame 101, the slide drawer 103 can be opened and closed by sliding, and the slide drawer 103 accommodates electrical components. The sliding drawer 103 is provided to be easily slidably opened and closed to operate or replace electrical parts disposed therein. Fig. 1b discloses a structure diagram of a sliding drawer of a body frame in a clay vehicle model according to an embodiment of the present invention. Referring to FIG. 1b, slide drawer 103 includes therein: the controller bracket 131, the storage battery bracket 132, the power switch bracket 133 and the operator bracket 134 are respectively used for placing a controller, a storage battery, a power switch and an operator, and the controller bracket 131, the storage battery bracket 132, the power switch bracket 133 and the operator bracket 134 are respectively used for placing a controller, a storage battery, a power switch and an operator. The lifting mechanism mount 104 is mounted on the main frame 101, the position of the lifting mechanism mount 104 corresponds to the position of the wheels, and the lifting mechanism mount 104 forms a lifting mechanism mounting point. In the illustrated embodiment, 4 lifter mounts 104 are respectively mounted on the main frame 101 at positions corresponding to four wheels to form four lifter mounting points. With continued reference to fig. 1a, the vehicle body frame 100 further includes a molding bracket 105, the molding bracket 105 is installed on the outer periphery of the main frame 101, and a plurality of molding brackets 105 extend from the rectangular main frame 101 to the outer periphery according to the outline of the real vehicle, because there is a difference between the shapes of the rectangular main frame 101 and the outline of the real vehicle, the shape of the vehicle body frame can be made closer to the outline of the real vehicle by the outwardly extending molding brackets, so as to achieve a result that is consistent with the outline of the real vehicle after covering the vehicle body covering. In the illustrated embodiment, the modeling bracket 105 includes four modeling brackets disposed at the sides of the main frame 101 and the modeling bracket 105 disposed at the front of the main frame 101 simulating the vehicle head modeling.

Fig. 2a and 2b disclose schematic diagrams of an electronic control assembly in a clay vehicle model according to an embodiment of the present invention, wherein fig. 2a discloses a control scheme layout diagram of the electronic control assembly, and fig. 2b discloses an equipment scheme layout diagram of the electronic control assembly. The electronic control assembly comprises a lifting mechanism 201, a brake mechanism 202, a steering mechanism 203, a controller 204, an operator 205, a driving system 206 and a storage battery 207. The lifting mechanism 201 and the braking mechanism 202 are connected to wheels, and the lifting mechanism 201 and the braking mechanism 202 are provided in one set for each wheel, so that four sets of the lifting mechanism 201 and the braking mechanism 202 are shown in the illustrated embodiment. The lifter 201 is also connected to a lifter mounting point on the body frame. Fig. 4 discloses a structure diagram of the lifting mechanism of the electric control assembly in the clay vehicle model according to an embodiment of the present invention. As shown in the drawing, in one embodiment, the lifting mechanism is a hydraulic rod 211, the hydraulic rod 211 is arranged in a vertical direction, the top of the hydraulic rod 211 is connected to a mounting point of the lifting mechanism on the vehicle body frame, the bottom of the hydraulic rod 211 is connected to an axle 212 for mounting wheels, and the hydraulic rod 211 is extended and retracted for lifting adjustment. The brake mechanism 202 adopts real vehicle parts, and includes an electronic mechanical caliper and a brake disc, the brake disc is installed on the wheel, and the controller controls the electronic mechanical caliper to clamp the brake disc to execute the braking action. The steering mechanism 203 is connected to the front wheels. Fig. 5 discloses a structure diagram of a steering mechanism of an electronic control assembly in a clay vehicle model according to an embodiment of the present invention. The steering mechanism 203 is a real steering rod connected to the front wheels. The drive system 206 is connected to the lifting mechanism 201, the braking mechanism 202 and the steering mechanism 203. The controller 204 is connected to a drive system 206 and an operator 205, the controller 204 controls the drive mechanism 206 according to an operation command from the operator 205, the drive mechanism 206 drives the lifting mechanism 201, the brake mechanism 202, and the steering mechanism 203 to operate, and the battery 207 supplies power to the controller, the operator, and the drive system. In one embodiment, the operator 205 provides an operator interface, the operator 205 may be an interactive device such as within a tablet computer, and the controller 204 comprises an onboard processor. The controller 204, the operator 205, and the battery 207 are collectively disposed in the sliding drawer 103, housed in the controller bracket, the operator bracket, and the battery bracket, respectively. Fig. 2a discloses a control scheme layout diagram of the electronic control assembly, from the perspective of the control scheme, the operator receives an instruction through the operation interface and then sends an operation instruction to the controller, and the controller operates the lifting mechanism, the brake mechanism and the steering mechanism according to the operation instruction. Fig. 2b discloses an equipment scheme layout diagram of the electric control assembly, and from the perspective of the executing mechanism, the driving system drives the lifting mechanism, the braking mechanism and the steering mechanism to act according to the operation instruction of the controller. The utility model discloses a steering mechanism has two kinds of drive pattern, and is corresponding with it, and actuating system also has two kinds of configuration modes. The first drive mode of the steering mechanism is to control the steering mechanism directly by means of a hydraulic actuator. The hydraulic pump can be shared by the lifting mechanism, and the cost is low. The disadvantage is that the response speed is slow, and the steering speed is slow in the practical use process due to the physical characteristics of the hydraulic actuating mechanism. If the steering mechanism adopts a direct hydraulic execution mode, the driving system is a hydraulic pump, the hydraulic pump is shared by the lifting mechanism and the steering mechanism, and the hydraulic rod and the steering rod of the real vehicle are driven by the hydraulic pump. The second driving mode of the steering mechanism is to add a power-assisted motor, and provide a steering signal to the power-assisted motor during steering to drive the power-assisted motor to perform motor power-assisted steering. The motor power-assisted steering has the advantages of large steering torque and high response speed, but needs to add a motor and control equipment, and accordingly increases the cost. If the steering mechanism adopts a motor-assisted mode, the driving system comprises a hydraulic pump and an assisted motor, a hydraulic rod is driven by the hydraulic pump, and a steering rod of the real vehicle is driven by the assisted motor.

The utility model discloses an automatically controlled subassembly has solved the problem of adjusting the automobile body gesture. The adjustment of the body posture is necessary preparation work before the wind tunnel test, and the existing national 5, national 6 and WLTP and enterprise internal research and development standards have different requirements on the body posture of the passenger car. In order to meet different standards, the clay model sample car has the function of accurately adjusting the height of the car body. The traditional clay model sample car can only adjust the posture of the car body to the height required by the regulations by means of auxiliary equipment, weight increase and the like, the process is long in time consumption and poor in adjustment precision, and the consistency of front and back tests is difficult to guarantee. The direction of the oil sludge model sample vehicle needs to be adjusted and the loading and unloading needs to be promoted by a trailer or manpower in the transportation process, the loading consumes long time, and the transportation potential safety hazard exists. Meanwhile, the wind tunnel test is carried out indoors and is limited by the size of a field, and the direction of the wind tunnel test cannot be adjusted by using a trailer, so that the oil sludge model sample car is difficult to enter a laboratory, and the test efficiency is influenced. The utility model discloses a real car suspended structure in traditional fatlute model car is replaced to electrically controlled hydraulic pressure mechanism for electrical system, and automatically controlled hydraulic pressure suspension adjustment accuracy is 1mm, realizes that car height degree adjusts in the test process, satisfies national 5, national 6 and WLTP and the internal research and development standard of enterprise to the automobile body height and the required precision in the test, simultaneously, design transportation mode height adjustment keeps off the position, through a key operation with the automobile body height adjustment to the highest, bottom part is damaged by the collision when avoiding the transportation in the ramp up and down; on the basis of a basic suspension steering mechanism, an actuating mechanism is added to replace an original steering wheel and an original power-assisted mechanism, and the basic steering mechanism is controlled to realize a steering function, so that the transportation is convenient; the steering system is calibrated in the return position, the direction of the wheels can be quickly adjusted during testing, and the testing and loading efficiency is improved.

Fig. 3 discloses a schematic control logic diagram of an electronic control component in the clay vehicle model according to an embodiment of the present invention. The steering mechanism in the embodiment shown in fig. 3 adopts a motor-assisted steering mode and is therefore equipped with a steering motor. As shown in fig. 3, for the steering operation, the operator gives a steering command to the controller through the operator, and the controller activates the steering control mechanism, which is a steering motor in this embodiment, and then drives the steering rod of the sludge model to steer until the required steering angle is met. For the lifting operation, an operator selects a part to be lifted through an operator, can respectively control the left front wheel, the right front wheel, the left rear wheel and the right rear wheel, and can lift or lower the two front wheels or the two rear wheels simultaneously. The controller can start the corresponding hydraulic pump to drive the hydraulic rod to work, and the height of the vehicle body can meet the required requirements through the telescopic motion of the hydraulic rod. In the illustrated embodiment, the hydraulic pump is shown to include: the hydraulic system comprises a left front hydraulic pump, a right front hydraulic pump, a left rear hydraulic pump, a rear hydraulic pump and a right rear hydraulic pump. The left front hydraulic pump and the front hydraulic pump jointly act on the left front hydraulic rod, the right front hydraulic pump and the front hydraulic pump jointly act on the right front hydraulic rod, the left rear hydraulic pump and the rear hydraulic pump jointly act on the left rear hydraulic rod, the right rear hydraulic pump and the rear hydraulic pump jointly act on the right rear hydraulic rod. The detector detects whether the steering and lifting actions are in place. If the detector detects that the steering and lifting actions are in place, namely the target value is reached, a Yes signal is output, and the process is finished. If the detector detects that the steering and lifting actions are not in place, namely the steering and lifting actions do not reach the target value, a No signal is output and fed back to the operator for continuous adjustment.

The electronic control assembly also provides a one-key returning function: a key aligning instruction is issued to the controller through the operation panel, the controller controls the steering mechanism to adjust the angle of the front wheel, and when the front wheel is adjusted to the calibration alignment position, the front wheel stops rotating. This function can improve loading efficiency during the experiment.

The electronic control assembly also provides a mode of transportation: the transportation mode instruction is given to the controller through the operation panel, and the lifting mechanism is controlled to adjust the vehicle body to the highest state, and other operations for reducing the height of the vehicle body are forbidden until the transportation mode is released.

The engine compartment cooling air flow is an important factor influencing the engine cooling, the excessive cooling flow can increase the wind resistance, and the wind resistance optimization measure can also influence the cooling air intake quantity. The traditional oil sludge vehicle cannot monitor the cooling air flow in the wind tunnel test process, cannot obtain the influence of the wind resistance optimization measure on the cooling air flow in the test, needs to check the cooling performance of the engine again through means such as simulation and the like after the test is finished, and often causes the contradiction between the wind resistance optimization measure and the cooling air flow demand. In order to solve the problem, the utility model discloses an increased fan speed measuring device in the fatlute model car, the rotational speed of the fan in the fan speed measuring device engine compartment subassembly. The fan rotating speed measuring device is used for measuring the rotating speed of a fan in an engine room assembly and arranging the rotating speed of the fan at the fan of the cooling module, measuring the rotating speed of the fan under different test working conditions in the test process, monitoring the change of the cooling air flow caused by the change of a wind resistance measure, and comprehensively evaluating the mutual influence of the measure on the wind resistance and the cooling air flow of the whole vehicle. Fig. 6 discloses a structure diagram of a fan rotation speed measuring device in a fatlute truck model according to an embodiment of the present invention. As shown in the drawing, the fan rotation speed measuring device includes: the optical fiber probe 301, the reflector plate 302 and the light receiving and transmitting device. Wherein the light transceiving means is an external device and thus not shown in fig. 6. The fiber optic probe 301 is mounted on the fan's shroud 303 with the fiber optic probe 301 aligned with the fan's blades 304. The reflector 302 is adhered to the blade 304 of the fan, and the reflector 302 covers the projection 311 of the fiber probe 301 on the blade. The light ray receiving and transmitting device is an external device and is connected to the optical fiber probe, the light ray receiving and transmitting device transmits light rays to the blade through the optical fiber probe, receives the light rays reflected by the reflector plate through the optical fiber probe, and calculates the rotating speed of the fan according to the received reflected light rays.

The automobile body covering part covers the automobile body framework, the outer contour of the automobile body covering part is processed according to the outer contour of the real automobile, and the automobile body covering part is provided with a seam and a cavity corresponding to the outer contour of the real automobile. The wind tunnel test results of batch vehicles and clay model sample vehicles are compared to find that some vehicle body seam roads have great influence on the wind resistance of the whole vehicle. The traditional clay model does not consider the seams and the internal cavity structure in the construction process, so that the influence of the body seam cannot be evaluated in the early stage of the project. The utility model discloses an automobile body panel is according to seam way and the inside cavity structure of structural data reduction real car, and attention keeps seam way size and the degree of consistency among the assembling process, simultaneously, in order to increase measure in the experimentation and can often dismouting, in the design process in order to fully consider easy dismounting nature. The following designs of the tail slot and cavity structure are described as examples. Fig. 7a and 7b disclose a comparison structure diagram of a car body covering part and a car outer contour in a clay car model according to an embodiment of the present invention, and fig. 7a and 7b show a rear tail seam and a cavity structure. Fig. 7a discloses a rear cover and rear tail structure of a real vehicle. As shown in fig. 7a, at the tail part of the sheet metal 401 of the vehicle body, a cavity 403 is formed at the contact part of the rear tail fin 402 and the vehicle body, and the cavity 403 leaves a movement space for opening the rear cover 405. The cavity 403 is connected with the outside through a seam 404, and depending on the shape, the air flow in the cavity may exchange with the air flow outside the whole vehicle, thereby affecting the wind resistance. Referring to fig. 7b, fig. 7a discloses the rear cover and rear tail structure of the fatlute model car, and referring to the real car model, the car body covering piece of the present invention comprises fatlute, foam and ABS plastic pieces. The ABS plastic is milled to form the rear tail 502. The sludge forms a roof structure 501 and a rear cover structure 505. The sludge forms a slot 504 and a cavity 503 at the junction of the rear tail and the roof. Slot 504 and cavity 503 correspond to slot 404 and cavity 403, respectively, in the solid vehicle molding. The utility model discloses an among the fatlute model car, roof and back lid are the fatlute structure, and the back fin adopts ABS to mill and forms, by locating pin and bolt fastening on fatlute, carry out the scheme change in the convenient experiment. The rear tail wing seam and cavity structure is formed by assembling vehicle body oil sludge, a tail wing ABS structure and a rear cover structure together, a groove structure is processed at the oil sludge at the tail part of the vehicle roof, a corresponding groove structure is processed at the tail wing, and in the assembling stage, attention needs to be paid to ensuring the size and the uniformity of the seam. In the test process, the rear tail wing can be detached, the sealing strip is pasted at the seam, the influence of the seam on the wind resistance is tested, and wind resistance optimization measures are provided in a targeted manner.

The wheel assembly has great influence on the wind resistance, the size of a tire, the shape of a hub and the like are important factors influencing the wind resistance, and researches show that the pneumatic resistance of the wheel assembly accounts for about 30% of the pneumatic resistance of the whole vehicle, so that a large number of wind tunnel tests need to be carried out on the wheels to optimize the wind resistance. At present, the wind resistance optimization of the hub modeling mainly adopts the following procedures, firstly, the wind resistance evaluation and optimization are carried out through simulation, and a hub sample is used for testing in the middle and later periods of a project, but because the optimization space is limited due to the proximity of batch nodes, a new round of simulation test optimization iteration cannot be completed, and the optimization effect is poor. For a batch vehicle, wheel assemblies with various sizes are generally matched, the wheel hub shape, the ET value and the like are different, the wind resistance optimization process of optimizing each wheel firstly and then testing a sample piece is not only long, but also the economic cost of sample piece manufacturing, the time cost and the development efficiency are very high. The utility model discloses a fatlute model car provides the wheel installation subassembly and solves foretell problem. The wheel mounting assembly includes a hub pad through which the wheel is mounted to the axle. In order to meet the requirement of optimizing the hub modeling wind resistance at the early stage of a project, the suspension mechanism of the oil sludge model vehicle is correspondingly adjusted so as to carry the replaceable modeling hub platform. The adjustment scheme selects the suspension assembly according to different platform types of the development vehicle: for a vehicle model developed based on a brand-new platform, because the suspension assemblies are not produced in mass, the oil sludge model sample vehicle selects a batch suspension assembly with a mature lower level, and the theory is adjusted by matching with a hub cushion block, so that the design size is met; to the motorcycle type based on current platform development, select the suspension assembly of this platform, when needs adjustment wheel base, realize different ET value requirements through the wheel hub gasket matching. The cushion block and the gasket are required to meet corresponding matching requirements, namely coaxiality with a half shaft and a wheel, flatness of a mounting surface, and requirements on rotation stability and safety under the test degree of 120 km/h-160 km/h. Fig. 8a, 8b, 8c and 8d disclose a block diagram of a wheel mounting assembly in a clay car model according to an embodiment of the invention. Fig. 8a and 8b disclose a block diagram of a wheel mounting assembly for a vehicle model developed for a completely new platform. For a new platform vehicle type, the hub cushion block 501 is in a plane shape, and mounting disc mounting holes 511 and hub mounting holes 512 which are distributed at intervals are formed in the hub cushion block 501. Mounting disc mounting hole and wheel hub mounting hole arrange on same circumference, in the embodiment shown in fig. 8a, 10 holes have on the wheel hub cushion 501, wherein 5 are mounting disc mounting hole 511, 5 mounting disc mounting holes are used for fixed mounting disc and cushion, 5 are wheel hub mounting hole 512 in addition, the wheel hub mounting hole is used for fixed cushion and wheel, through the mounting disc, two liang of cooperations between cushion and the wheel, both guaranteed flatness and axiality between the three, satisfied structural strength requirement under experimental speed of a motor vehicle again. Referring to fig. 8b, the mounting plate mounting hole 511 is a stepped hole, and the hub mounting hole 512 is a through hole. For wheels with different sizes and ET values, the ET value can meet the design requirement by changing the thickness h of the hub cushion block, and the thickness range of the hub cushion block 501 is generally 20 mm-30 mm. Fig. 8c and 8d disclose block diagrams of the wheel mounting assembly for vehicle models developed for existing platforms. For the existing platform vehicle type, the boss structure is arranged in the middle of the hub cushion block 502, and the hub cushion block is provided with mounting holes 521 which are uniformly distributed along the circumference. In the embodiment shown in fig. 8c, the hub pad 502 has 5 mounting holes around its periphery for securing the mounting plate, the spacer and the wheel to ensure flatness between the contact surfaces. Referring to fig. 8d, a boss structure is designed in the middle of the hub cushion block to ensure the coaxiality of the mounting disc, the gasket and the wheel. The normal running of the wheels of the oil sludge model sample car is ensured through tangential and axial constraints. For wheels with different sizes and ET values, the ET value can meet the design requirement by changing the thickness h of the hub cushion block or overlapping hub cushion blocks with different sizes, and the thickness range of the hub cushion block 502 is generally 2-10 mm.

The China automobile market is mature day by day, and customers pay more attention to the driving safety of a new product; in order to meet the requirement of driving safety in rainy days, an aerodynamic department needs to verify the water management performance of the side window glass and the outer rearview mirror of the driver through a test in the early stage, the test is mainly carried out through a sample car in the technical scheme in the current stage, but the sample car is delivered late, the freezing time of the model is often missed, and the performance optimization of the relative side window glass and the rearview mirror car body with large pollution resistance is difficult to enter mass production; how to use the oil sludge-like vehicle to carry out the experiment is an important subject in the research and development process. The utility model discloses a fatlute model car uses the water management external member to satisfy the requirement of water management test. In one embodiment, the sludge model vehicle further comprises a water management kit replacing a portion of the body cover for performing a water management test, the water management kit comprising: a wiper assembly, a front windshield 601, an a-pillar 602, a roof 603, a quarter light 604, a rear view mirror, side windows 605, and a seal 606. In which a driving unit 607 of a wiper is installed in an inner space of a body frame and a wiper 608 is installed on a front windshield 601. The front windshield 601, side window 605, mirror and wiper assembly are all real vehicle parts, and the mirror base, mirror housing and A-pillar 602 are ABS plastic parts. Fig. 9a and 9b disclose a block diagram of a water management kit in a clay car model according to an embodiment of the invention. In fig. 9a and 9b, the complete mirror is not shown, only the mounting point 609 of the mirror is disclosed, the location of the mounting point 609 of the mirror being the same as in a real vehicle. Referring to fig. 9a and 9b, the sludge model car was designed with consideration of the water management test requirements of the driver side window and the exterior rear view mirror. In the skeleton design stage, a mounting space of equipment required by an electric wiper is reserved at the front cabin part of the sample car, and a mounting scheme of a front windshield of the real car and side window glass of a driver is designed on a skeleton; and after the wind resistance development work is finished, modifying the water management model sample car. The main transformation areas of the side window glass and rearview mirror vehicle body antifouling performance verification model comprise wiper components, front windshield glass, A columns, a vehicle roof, a triangular window, a rearview mirror, side window glass, water retaining strips, sealing strips and other sealing elements. The wiper wiping and speed regulation functions are realized by a wiper motor, and a driving component 607 of the wiper, such as a power supply, a motor, a controller and the like, which is equipped for realizing the wiper function is arranged in the clay model. In order to ensure the test effect, the front windshield 601, the main driving side window glass 605, the rearview mirror lens and the windscreen wiper 608 adopt real vehicle parts, the rearview mirror base, the rearview mirror housing and the A column 602 can adopt ABS milling, and in order to ensure the rain effect, the ABS milling part needs to be sprayed with real vehicle paint. The inner sides of the front windshield and the driver side window glass are sprayed with black paint to ensure good water mark observation effect in the test process. An operation window is reserved on the copilot side, and the switch of the electric windscreen wiper can be controlled and the storage battery of the windscreen wiper system can be replaced through the operation window. All parts need to be subjected to water leakage prevention treatment at assembly gaps, waterproof adhesive tapes are pasted at the joint of ABS and oil sludge, and glass cement treatment is adopted at the joint of glass and ABS. Referring to fig. 9b, support bars, in the illustrated embodiment, a main support bar 610 and a side support bar 611, are added to the interior of the fatlute model car for supporting the front windshield, a-pillar, roof, etc.

The utility model discloses a fatlute model car has following advantage:

in order to meet the requirement of high adjustment in the test, an electric control hydraulic system is added, and a suspension of an original vehicle chassis is modified, so that the posture of a model vehicle body is adjusted more conveniently and more conveniently, and the requirement of high precision can be met.

In order to improve the transportation safety of the oil sludge model vehicle and the loading convenience in the test, the requirements of steering and braking functions are provided for the oil sludge model vehicle. A batch vehicle steering system is improved, oil sludge steering is achieved through electric control operation, and a batch vehicle brake mechanism is arranged on the oil sludge vehicle.

In order to obtain the influence of the wind resistance optimization measure on the cooling air flow, a rotating speed sensor is arranged at a fan of the cooling module of the oil sludge model sample car to monitor the variation trend of the cooling air flow.

In order to research the influence of the seam road on the wind resistance, the position, the length and the cavity structure of the actual seam road are referred, and the corresponding seam road and the corresponding cavity are designed before the oil sludge model sample is machined.

The hub platform capable of replacing the hub model and adjusting the ET value is carried on, the hub model can be replaced quickly on the premise that the size of the wheel is correct, and wind resistance optimization of the hub in the early stage of the project is achieved.

In the stage of water management performance test transformation of the clay model sample car, test related parts such as a front windshield, a side window glass, a rearview mirror and the like of the model are replaced by real car parts, an electric wiper module is installed, the state of a real car in rainy days is simulated, and the visual field of a driver in rainy days is evaluated and optimized in the early stage of a project.

It should also be noted that the above-mentioned embodiments are only specific embodiments of the present invention. It is obvious that the present invention is not limited to the above embodiments, and similar changes or modifications can be directly derived or easily suggested by those skilled in the art from the disclosure of the present invention, and all should fall within the protection scope of the present invention. The above-described embodiments are provided to enable persons skilled in the art to make or use the invention, and many modifications and variations may be made to the above-described embodiments by persons skilled in the art without departing from the inventive concept of the present invention, so that the scope of the invention is not limited by the above-described embodiments, but should be accorded the widest scope consistent with the innovative features set forth in the claims.

Claims (10)

1. A sludge model vehicle, comprising:

the chassis assembly comprises a chassis and chassis parts, the chassis and the chassis parts are real vehicle chassis and real vehicle chassis parts, and the chassis parts are assembled in the same way as a real vehicle;

the engine compartment assembly comprises real vehicle engine compartment parts, and is installed in the engine compartment of the chassis in the same way as a real vehicle;

the lifting mechanism comprises a chassis, a vehicle body framework, a lifting mechanism mounting point and a lifting mechanism mounting point, wherein the vehicle body framework is mounted on the chassis, an adjustable internal space is formed in the vehicle body framework, and the internal space contains electric parts, wiring harnesses and pipelines;

the electric control assembly comprises a lifting mechanism, a brake mechanism, a steering mechanism, a controller, an operator, a driving system and a storage battery, wherein the lifting mechanism and the brake mechanism are connected with wheels;

a fan speed measurement device that transmits a speed of a fan in the nacelle assembly;

the automobile body covering part covers the automobile body framework, the outer contour of the automobile body covering part is processed according to the outer contour of the real automobile, and a seam and a cavity corresponding to the outer contour of the real automobile are formed in the automobile body covering part;

the wheel mounting assembly comprises a hub cushion block, and the wheel is mounted on the axle through the hub cushion block.

2. The sludge model car of claim 1, wherein the body frame comprises:

the main frame is a cuboid structure formed by welding longitudinal beams, cross beams and vertical beams;

the partition plate is arranged in the main frame and connected with the main frame through bolts, the partition plate divides the main frame into a plurality of cabins, the size of each cabin can be adjusted by adjusting the position of the partition plate, so that an adjustable internal space is formed in the vehicle body framework, and the partition plate is provided with wiring holes for the wiring harnesses and the pipelines to pass through;

the sliding drawer is arranged at the tail part of the main frame and can be opened and closed in a sliding mode, and the sliding drawer accommodates electric parts;

the lifting mechanism mounting piece is mounted on the main frame, the position of the lifting mechanism mounting piece corresponds to the position of the wheel, and the lifting mechanism mounting piece forms a lifting mechanism mounting point.

3. The sludge model car of claim 2 wherein said sliding drawer comprises: the device comprises a controller bracket, a storage battery bracket, a power switch bracket and an operator bracket.

4. The fatlute model car of claim 2, wherein the car body frame further comprises a shaping bracket mounted on the outer periphery of the main frame, and a plurality of shaping brackets extend from the rectangular parallelepiped main frame to the outer periphery according to the outer contour of the car.

5. The sludge model car of claim 1 wherein,

the lifting mechanism is a hydraulic rod, the hydraulic rod is arranged in the vertical direction, the top of the hydraulic rod is connected to a mounting point of the lifting mechanism on the vehicle body framework, the bottom of the hydraulic rod is connected to an axle for mounting wheels, and the hydraulic rod stretches to perform lifting adjustment;

the steering mechanism is a real vehicle steering rod which is connected with the front wheel;

the brake mechanism comprises an electronic mechanical caliper and a brake disc, the brake disc is installed on a wheel, and the controller controls the electronic mechanical caliper to clamp the brake disc to execute brake action.

6. The sludge model car of claim 5 wherein,

the driving system is a hydraulic pump, the hydraulic pump is shared by a lifting mechanism and a steering mechanism, and the hydraulic rod and the steering rod of the real vehicle are driven by the hydraulic pump; or

The driving system comprises a hydraulic pump and a power-assisted motor, the hydraulic rod is driven by the hydraulic pump, and the steering rod of the real vehicle is driven by the power-assisted motor.

7. The sludge model car of claim 1 wherein the fan speed measuring device comprises:

the optical fiber probe is arranged on the housing of the fan and is aligned with the blades of the fan;

the reflector plate is adhered to the blade of the fan and covers the projection of the optical fiber probe on the blade;

and the light ray receiving and transmitting device is connected to the optical fiber probe, transmits light rays to the blade through the optical fiber probe, receives the light rays reflected by the reflector plate through the optical fiber probe, and calculates the rotating speed of the fan according to the received reflected light rays.

8. The sludge model car of claim 1 wherein the body cover piece comprises sludge, foam and ABS plastic pieces,

the oil sludge forms a roof structure and a rear cover structure, the ABS plastic part forms a rear tail wing, and the oil sludge forms a seam and a cavity at the joint of the rear tail wing and the roof.

9. The sludge model car of claim 1 wherein,

for a new platform vehicle type, the hub cushion block is in a plane shape, mounting disc mounting holes and hub mounting holes are distributed on the hub cushion block at intervals, the mounting disc mounting holes and the hub mounting holes are distributed on the same circumference, the mounting disc mounting holes are stepped holes, the hub mounting holes are through holes, and the thickness of the hub cushion block is 20-30 mm;

for the existing platform vehicle type, the middle of the hub cushion block is of a boss structure, mounting holes are uniformly distributed along the circumference on the hub cushion block, and the thickness of the hub cushion block is 2-10 mm.

10. The sludge model car of claim 1, further comprising: a water management kit for replacing a portion of a body panel for performing a water management test, the water management kit comprising: the automobile windscreen wiper comprises a windscreen wiper component, a front windscreen, an A column, a roof, a triangular window, a rearview mirror, side window glass and a sealing element, wherein a driving component of the windscreen wiper is installed in an inner space of an automobile body framework, the front windscreen wiper, the side window glass, a rearview mirror lens and the windscreen wiper are parts of an actual automobile, and a rearview mirror base, a rearview mirror housing and the A column are ABS plastic parts.

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