CN205691348U - A kind of vehicle ABS brake tester carrying out multiple test - Google Patents

Abstract

This utility model discloses a kind of vehicle ABS brake tester carrying out multiple test, this testing stand is separately installed with individually takes turns speed detector, wheel ABS simulator fixing device at the front left of framework platform, front right-hand member and rear left, rear right-hand member, can detect car load ABS or the braking ability of wheel abs braking analog respectively.Testing stand cylinder group passes through electric expansion bar, controls different automobile types two axle base, electric expansion bar two ends and cylinder group two axle Dynamic link library, can accurately control different size vehicle wheel footpath, it is achieved the purpose of precision test.This utility model can detect accurately multiple in the case of car load or single tire braking effect under abs braking effect, have more significant scientific research value, Teaching Value；Additionally this utility model also has simple in construction, advantage easy and simple to handle.

Description

A Vehicle ABS Braking Test Bench Capable of Various Tests

technical field

The utility model relates to the field of automobile detection, in particular to a vehicle ABS braking test bench capable of performing various tests.

Background technique

Since ABS can significantly improve the braking performance of automobiles, it has become the basic equipment of automobile braking systems. With the increasing application of ABS in automobiles, how to accurately, quickly and effectively detect the working performance of ABS has become a very urgent task. task. At present, the method widely used at home and abroad to test the working performance of automotive ABS is the actual road test, but from the test situation, this method has defects such as high cost, long cycle, and low accuracy.

Now there are some ABS test equipment using common inertial brake test benches, which can only measure a certain type of vehicle with a fixed wheelbase, and cannot measure a single wheel simulation device in the experimental research or teaching process. When the ABS of the whole vehicle is tested, the adhesion coefficient, load and resistance of the road surface change, and different types of vehicles have different requirements for the test bench. Compared with the whole vehicle, the wheel ABS braking simulation device is more conducive to the accuracy of the test. sex and safety. Especially in test, teaching and other environments, it is more conducive to the detection of ABS performance if the vehicle and wheel ABS braking simulators are tested separately, but the existing technology does not have the detection function under the above conditions, and cannot be used for different Effective detection of ABS performance of vehicles with wheelbase and different wheel diameters cannot achieve the proper detection and evaluation function. Therefore, it is an urgent problem to be solved in the current automobile inspection and testing industry to be able to detect the vehicle ABS and the wheel ABS braking simulator at the same time, and to detect vehicles with different wheelbases and wheel diameters.

Utility model content

Aiming at the deficiencies of the existing technology, the technical problem to be solved by the utility model is: to provide an ABS performance test for the vehicle and the wheel simulation device at the same time, and can accurately adjust the wheelbase between the two axles of the car, and the ABS of the wheel diameter. Brake test bench. The device is mainly used in teaching and scientific experiments, and has significant scientific research significance. In addition, the utility model has the advantages of simple structure, convenient operation and good stability.

The technical solution of the utility model to solve the technical problem is to provide a track electric control telescopic device that can accurately adjust the wheelbase between the two axles of the ABS brake test bench automobile and accurately match the wheel diameter, and does not affect the entire vehicle. When testing, it can be tested with the fixing mechanism of the wheel ABS braking simulation device. The test bench includes: front left, front right, rear left, and rear right flywheel shafts symmetrically arranged on the rack platform, front left, front right, rear left, and rear right transmission boxes, front left wheel drum set, and front right wheel drum group, the rear left wheel roller group, and the rear right wheel roller group, the flywheel shafts are respectively connected with the corresponding front and rear transmission boxes, and the telescopic transmission shafts are connected end to end with the corresponding transmission boxes, and the flywheel shafts are provided with a flywheel, which is characterized in that, The front and rear axle rack platforms are also provided with front left wheel, front right wheel, rear left wheel, and rear right wheel torque controllers, and each torque controller is connected to the corresponding roller group and drive shaft from end to end respectively;

The torque controller is an electromagnetic brake, especially a magnetic powder brake;

The roller set includes: a main roller, an auxiliary roller, a roller group frame, a wheel lifting device, a vehicle ABS brake wheel simulator fixing device, and a wheel speed sensor for the main and auxiliary rollers. The main drum and the auxiliary drum are connected through electric telescopic rods, and the ends of the two shafts of the main and auxiliary drums are respectively connected with the wheel speed sensors of the main and auxiliary drums, wherein the shaft of the main drum is connected with the corresponding telescopic transmission shaft through a coupling;

One end of the electric telescopic rod is fixedly connected with the main roller, and the other end is elastically connected with the auxiliary roller through a position fixing block, so as to adapt to the wheel diameters of different sizes, and the middle end of the electric telescopic shaft is connected with the wheel lifting device at the same position. The bottom of the wheel lifting device can move forward and backward through slide rails, so as to adapt to changes in the wheelbase of different models;

Each of the roller groups is provided with a wheel ABS braking simulator fixing device, so as to fix the wheel ABS braking simulator, the fixing device is a telescopic fixing rod, and the upper end of the rod is provided with a chuck;

The mode of described testing station control adhesion coefficient is as follows: according to the stressed situation analysis of tested vehicle on the roller, the adhesion provided by the roller is:

In formulas ①～⑤, μ is the adhesion coefficient between the roller and the tire, N ₁ and N ₂ are the support force of the main roller and auxiliary roller to the wheel respectively; G _l is the wheel load; α is the installation angle of the wheel on the roller ; M is the torque, I is the current of the torque controller. It can be seen that when the wheel load G _l is known, use the electric telescopic shaft to control and record the wheel diameter D, wheelbase H, roller radius R and other fixed values, and the test bench can be changed by changing the installation angle α of the wheel on the roller Adhesion coefficient μ, change the adhesion force F _μ provided by the roller to realize coefficient adjustment. During the braking process, by detecting the information of the main and auxiliary drum speed sensors and the sensing drum speed sensor, the vehicle speed and the wheel speed and changes of each wheel are reflected, so as to realize the test and detection of the performance of the vehicle ABS system.

Compared with the prior art, the beneficial effect of the utility model is: since the front left, front right and rear left and rear right ends of the rack platform are respectively equipped with a separate wheel speed detection device and a wheel ABS simulator fixing device, it can The braking performance of the vehicle ABS or the wheel ABS braking simulation device is tested respectively. The roller group of the test bench controls the distance between the two axles of different models through the electric telescopic rod. The two ends of the electric telescopic rod are dynamically connected with the two axles of the roller group, which can accurately control the diameter of wheels of different sizes and realize precise testing. The utility model can accurately detect the braking effect of the whole vehicle or a single tire under the braking action of ABS in various situations, and has significant scientific research value and teaching value. In addition, the utility model has a simple structure and easy operation. advantage.

Description of drawings

Fig. 1 is a schematic diagram of the front view of the overall structure of an embodiment of the utility model test bench (wherein 13, the frame platform; 14, the front left wheel ABS braking test device assembly (wherein 14A, the front left flywheel group, 14B, the front Left flywheel shaft, 14C, front left transmission shaft, 14D, front left transmission, 14E, front left torque controller, 14F, front left telescopic transmission shaft, 14G, front left coupling, 14H, front left roller group); 15. Front right wheel ABS braking test device assembly (of which 15A, front right flywheel group, 15B, front right flywheel shaft, 15C, front right transmission shaft, 15D, front right transmission, 15E, front right torque controller, 15F , front right retractable transmission shaft, 15G, front right coupling, 15H, front right roller group); 16, rear right wheel ABS braking test device assembly (of which 16A, rear right flywheel group, 16B, rear right flywheel group) Axle, 16C, rear right transmission shaft, 16D, rear right transmission, 16E, rear right torque controller, 16F, rear right telescopic transmission shaft, 16G, rear right coupling, 16H, rear right roller group); 17, Rear left wheel ABS braking test device assembly (17A, rear left flywheel group, 17B, rear left flywheel shaft, 17C, rear left transmission shaft, 17D, rear left transmission, 17E, rear left torque controller, 17F, rear left Retractable drive shaft, 17G, rear left coupling, 17H, rear left roller group)).

Fig. 2 is a schematic diagram of the right view of the overall structure of the roller group of an embodiment of the utility model test bench (the right side plate of the roller group frame has been removed);

Among them: 1. Roller frame; 2. Main drum; 3. Main drum speed sensor; 4. Main drum shaft; 5. Electric telescopic rod; 6. Wheel lifting device; 7. Auxiliary drum shaft; ; 9. The position fixing block of the auxiliary drum; 10. The auxiliary drum.

Fig. 3 is a schematic structural view of a wheel ABS braking simulator fixing device of an embodiment of the utility model test bench (wherein 11, a wheel lifting device slide rail; 12, a wheel ABS braking simulator fixing rod).

Fig. 4 is a schematic diagram of circuit connection of an embodiment of the test bench of the present invention.

Fig. 5 is a schematic diagram of a test state of an embodiment of the test bench of the present invention.

detailed description

Below in conjunction with embodiment and accompanying drawing, the utility model method is further described.

The utility model provides a vehicle ABS test bench (referred to as the test bench, referring to Figs. 1-5) capable of performing various tests. The test bench includes a frame platform 13, a front left wheel ABS brake test device assembly 14, a front right wheel ABS brake test device assembly 15, a rear right wheel ABS brake test device assembly 16, and a rear left wheel ABS brake test device assembly. Device assembly 17. The structure of the front left wheel ABS brake test device assembly 14, the front right wheel ABS brake test device assembly 15, the rear right wheel ABS brake test device assembly 16 and the rear left wheel ABS brake test device assembly 17 is exactly the same, The four are symmetrically installed on the four corners of the rack platform 13 with the central axis of the rack platform 13 as the center of symmetry.

The front left wheel ABS braking test device assembly 14 includes a front left flywheel group 14A, a front left flywheel shaft 14B, a front left transmission shaft 14C, a front left transmission 14D, a front left torque controller 14E, and a front left telescopic transmission shaft 14F , Front left shaft coupling 14G, front left drum group 14H. The front left wheel drum set 14H is connected to the output end of the front left torque controller 14E through the front left coupling 14G, the input end of the front left torque controller 14E is rigidly connected to the front left transmission 14D, and the front left flywheel shaft 14B passes through the front left torque controller 14E. The left speed changer 14D is connected with the front left telescopic transmission shaft 14F to realize mutual synchronization, and the front left flywheel group 14A is rigidly installed on the front left flywheel shaft 14B.

Referring to Fig. 1, the same front left wheel roller group 14H, front right wheel roller group 15H, rear right wheel roller group 16H, and rear left wheel roller group 17H are respectively symmetrically installed on the test bench frame platform 13, and each roller group is respectively Through front left coupling 14G, front right coupling 15G, rear right coupling 16G, rear left coupling 17G and corresponding front left torque controller 14E, front right torque controller 15E, rear right torque controller 16E, the output end of the rear left torque controller 17E is connected, and the input end of each torque controller is rigidly connected with the corresponding front left speed changer 14D, front right speed changer 15D, rear right speed changer 16D, and rear left speed changer 17D. The front left flywheel shaft 14B, the front right flywheel shaft 15B, the rear right flywheel shaft 16B, and the rear left flywheel shaft 17B respectively pass through the front left speed changer 14D, the front right speed changer 15D, the rear right speed changer 16D, and the rear left speed changer 17D. The transmission shaft 14F, the front right telescopic transmission shaft 15F, the rear right telescopic transmission shaft 16F, and the rear left telescopic transmission shaft 17F are connected to realize mutual synchronization. The front left flywheel shaft 14B, the front right flywheel shaft 15B, the rear right flywheel shaft 16B, and the rear left flywheel shaft 17B are rigidly installed respectively with four front left flywheel groups 14A, front right flywheel groups 15A, and rear right flywheel groups with the same moment of inertia. The flywheel set 16A and the rear left flywheel set 17A are used to simulate the kinetic energy of the vehicle to be tested. The four torque controllers use magnetic powder brakes, specifically by changing the current of the magnetic powder brake excitation coil to change the size of the transmitted torque, so as to realize the change of the adhesion coefficient.

The previous left wheel drum set 14H is used as an example to illustrate the internal connection relationship of the drum set. The front left wheel drum group 14H includes the main drum shaft 4, the electric telescopic rod 5, the wheel lifting device 6, the auxiliary drum shaft 7, and the auxiliary drum position fixing block 9; the main drum 2 and the auxiliary drum 10 are installed on the drum group frame 1 Above, the two rollers are respectively installed on the two ends of the electric telescopic rod 5 through the main roller shaft 4 and the auxiliary roller shaft 7, wherein, one end of the electric telescopic rod 5 is fixedly connected with the main roller 2, and the other end is connected with the auxiliary roller 10 through the auxiliary roller. The position fixing block 9 is elastically connected; the output ends of the two drums are respectively connected with the main drum speed sensor 3 and the auxiliary drum speed sensor 8 . Each main drum speed sensor 3 , auxiliary drum speed sensor 8 , and electric telescopic rod 5 are independently connected to the overall measurement and control unit, and are independently monitored and controlled by the measurement and control unit, as shown in FIG. 4 . The wheel lifting device 6 is installed in the lower position between the main drum 2 and the auxiliary drum 10, its upper end is fixedly connected with the middle part of the electric telescopic rod 5, and its base is arranged in the groove track 11 at the bottom of the drum group frame 1. Front right wheel drum group 15H, rear right wheel drum group 16H, rear left wheel drum group internal structure and connection are identical with front left wheel drum group 14H. The wheel lifting device 6 is driven and controlled by a pneumatic hydraulic cylinder to move up and down. As shown in Figure 2, the base of the wheel lifting device 6 is controlled in the same position as the electric telescopic rod 5. Move on groove slide rail 11, change the distance between two rollers and the position between two roller groups, can cooperate the automobile of different wheel diameter, lift wheel so that vehicle drives in and drives out test stand.

Referring to Fig. 3 and Fig. 5, the four-wheel braking test devices of the test bench of the utility model are independent of each other, so as to independently monitor and control the braking conditions of the four wheels when braking when turning. And on the base of the wheel lifting device 6 of the drum group, a wheel ABS braking simulator fixed rod 12 is provided, so that a single wheel ABS braking simulator is tested for ABS braking.

The test process of a single wheel ABS brake simulator on this test bench is: the wheel ABS brake simulator is fixed on any ABS brake test device assembly through a fixed rod, a fixed amount of force is applied, and it runs at a low speed to straighten wheels so that the wheels are in contact with the corresponding front and rear roller sets. When starting the test, set the adhesion coefficient of the wheel, that is, the control current of the torque controller according to the test requirements, start the wheel simulator again, the wheel drives the roller to rotate, and the roller group drives the flywheel to rotate through the electric telescopic rod, torque controller, and flywheel shaft to simulate body kinetic energy. When the wheel runs at a speed of 5km/h for a few seconds and then accelerates to a wheel speed of 40km/h, then stop the wheel simulator to make the wheel slide, and then start the wheel ABS brake simulator ABS brake until the wheel speed is zero. During the test, the speed of the flywheel shaft and the speed changes of the speed sensors on each roller are used to calculate the utilization rate of the adhesion coefficient of the vehicle and the slip rate of the vehicle relative to the ground, and evaluate the performance of the ABS system.

The test process of the vehicle on the test bench is as follows: After the car drives on the test bench, it runs at a low speed to straighten the wheels, make the wheels contact with the corresponding front and rear roller sets, and fix the body to prevent it from jumping out. At the beginning of the test, the adhesion coefficient of each wheel is set according to the test requirements, that is, the control current of the torque controller. The driver starts the vehicle, and the wheels drive the roller to rotate. The roller group drives the flywheel to rotate through the electric telescopic rod, torque controller, and flywheel shaft to simulate. The kinetic energy of the vehicle body and the flywheel shaft are connected to each other through the transmission and the telescopic drive shaft to achieve mutual synchronization. When the vehicle runs at a speed of 5km/h for a few seconds and then accelerates to a speed of 40km/h, then the transmission slides in neutral, and after coasting, emergency braking can be performed until the vehicle speed is zero. During the test, the speed of the flywheel shaft and the speed changes of the speed sensors on each roller are used to calculate the utilization rate of the adhesion coefficient of the vehicle and the slip rate of the vehicle relative to the ground, and evaluate the performance of the ABS system of the vehicle.

The utility model can be widely used in ABS research and development, vehicle inspection institutions and vehicle-related professional teaching, and can eliminate potential safety hazards of the vehicle through detection, thereby improving the driving safety of the vehicle.

The unmentioned part of the utility model is applicable to the prior art.

Claims (3)

1. one kind can carry out the vehicle ABS test-bed of multiple test, it is characterised in that include framework platform, front revolver abs braking Assay device assembly, front right wheel abs braking assay device assembly, rear right wheel abs braking assay device assembly, rear revolver ABS system Dynamic test assembly of devices；Front revolver abs braking assay device assembly, front right wheel abs braking assay device assembly, rear right wheel ABS Brake test device assembly is identical with the structure of rear revolver abs braking assay device assembly, and four with in framework platform Axis is symmetrical centre, is separately mounted to symmetrically on four angles of framework platform；

Described front revolver abs braking assay device assembly includes front left flywheel group, front left flywheel shaft, front left transmission shaft, front left Variator, front left torque controller, the scalable power transmission shaft of front left, front left shaft coupling, front left cylinder group；Described front revolver cylinder group It is connected by the outfan of front left shaft coupling with front left torque controller, the input of front left torque controller and front left variator Rigidly connected, front left flywheel shaft is connected by the scalable power transmission shaft of front left variator and front left and realizes being mutually in step, and front left flies On wheel shaft, rigidity is provided with front left flywheel group；

Be respectively symmetrically on framework platform be provided with identical front revolver cylinder group, front right wheel cylinder group, rear right wheel cylinder group, Rear revolver cylinder group, each cylinder group respectively by front left shaft coupling, front right shaft coupling, rear right shaft coupling, rear left shaft coupling with Corresponding front left torque controller, front right torque controller, rear right torque controller, the outfan phase of rear left torque controller Even, the input of each torque controller becomes with corresponding front left variator, front right variator, rear right variator, rear left respectively Speed device is rigidly connected；Front left flywheel shaft, front right flywheel shaft, rear right flywheel shaft, rear left flywheel shaft are respectively by front left variator, front Right variator, rear right variator, rear left variator power transmission shaft scalable with front left respectively, the scalable power transmission shaft of front right, rear right can Flexible power transmission shaft, the scalable power transmission shaft of rear left are connected to realize being mutually in step；Front left flywheel shaft, front right flywheel shaft, rear right flywheel On axle, rear left flywheel shaft rigidity corresponding respectively be provided with four identical front left flywheel groups of rotary inertia, front right flywheel group, after Right flywheel group, rear left flywheel group, be used for simulating the kinetic energy of vehicle to be measured；Four torque controllers use magnetic powder brake, specifically It it is the torque changing transmission by changing the electric current of magnetic powder brake magnetizing coil, it is achieved the change of attachment coefficient；

The internal annexation of cylinder group was described as a example by revolver cylinder group in the past；Front revolver cylinder group includes main drum shaft, electronic stretches Contracting bar, wheel lifting device, auxiliary roller axis, auxiliary cylinder position fixed block；Cylinder it is arranged on abreast before and after master rotor, auxiliary cylinder On group frame, two cylinders are separately mounted to the two ends of electric expansion bar, wherein, electric expansion bar by main drum shaft, auxiliary roller axis One end and master rotor fixing is connected, its other end passes through auxiliary cylinder position fixed block resilient connection with auxiliary cylinder；Two cylinders Outfan is connected with master rotor speed probe, auxiliary cylinder speed probe respectively；Each master rotor speed probe, auxiliary cylinder Speed probe, electric expansion bar respectively with total measurement and control unit separate connection, individually by measurement and control unit monitoring with control；Car Wheel lifting device is arranged on the lower position between master rotor, auxiliary cylinder, and its upper end is fixing with the middle part of electric expansion bar to be connected, Its base is arranged in the grooved tracks bottom cylinder group frame；In front right wheel cylinder group, rear right wheel cylinder group, rear revolver cylinder group Portion's structure and connection are identical with front revolver cylinder group；Wheel lifting device is driven by gas-hydraulic cylinder and controls to move up and down, and wheel is lifted Rise device pedestal and electric expansion bar collocated control, sliding at groove by the flexible of electric expansion bar and wheel lifting device base Move on rail, change two roller pitch from and two cylinder groups between position, the automobile in different wheel footpath can be coordinated, lifting wheel is with convinent car Enter and exit testing stand.

The most according to claim 1 a kind of carry out the vehicle ABS test-bed of multiple test, it is characterised in that four ABS Brake test device assembly is separate, in order to carry out independently monitoring and controlling to the brake condition of during brakeing during cornereing four wheels System.

The most according to claim 1 a kind of carry out the vehicle ABS test-bed of multiple test, it is characterised in that at cylinder The base of the wheel lifting device of group is provided with wheel abs braking simulator and fixes bar, in order to single wheel abs braking mould Intend device and carry out abs braking detection.