JPS58200128A - Loading apparatus for vehicle - Google Patents

Abstract

PURPOSE:To greatly reduce the number of processes necessary for the test by an apparatus wherein load is applied to vehicles using an oil hydraulic cylinder unit without a need of loading and unloading goods such as sand bags onto vehicles. CONSTITUTION:A loading apparatus for vehicles is placed on a chassis dynamo 4, and an oil hydraulic cylinder unit 5 equipped with a hydraulic cylinder 6 is disposed below a floor surface 3. When a piston 8 of the hydraulic cylinder 6 is descended and a piston rod 9 draws a horizontal member 21 downward, load is applied to a chassis frame 10 through a base plate 20. In other words, load can be applied to vehicles using the oil hydraulic unit. This eiliminates a need of loading an unloading goods such as sand bags onto the vehicles, and hence the number of processes necessary for the test can be greatly reduced.

Description

[Detailed description of the invention] This book is related to loading force loading force for a single vehicle, and in particular, a performance test was carried out on a chassis dynamo. The load on the wheels that is not loaded is 1.

Conventionally, when performing actual vehicle performance tests by placing the drive vehicle on the chassis dynamometer of a vehicle such as a truck or bus, the load on the wheels is carried out by loading baggage such as sandbags, and after the test is completed, the load is applied to the wheels. This method requires a lot of man-hours because unloading the baggage must be done in a dangerous manner, and it also takes a long time to conduct one test, which has the drawback of poor work efficiency. In addition, loading luggage such as sandbags,
Since this is done on completed wheels, there is no difference in the time it takes for a truck, but since the seats and floor surfaces of passes are finished with high-quality fabrics and carpets, there is a risk of damaging or staining these. It was not desirable to load and unload baggage such as sandbags.

The present invention has been made in order to eliminate the drawbacks of the prior art described above, and its purpose is to carry out an actual J & performance test of the vehicle by mounting the drive wheels of the vehicle on a chassis dynamometer. In this invention, the load on the vehicle can be applied by means of a hydraulic cylinder system, and this eliminates the need for loading and unloading sandbags from the wheels. The aim is to significantly reduce the number of man-hours required to study for the test, and to complete the test in a short amount of time, thereby making work easier and improving work efficiency. Another object of the present invention is to eliminate the need to pollute the inside of a bus during actual bus performance tests. A vehicle for carrying out an actual performance test of a skeleton vehicle, comprising: a hydraulic cylinder device, a hydraulic control device for the hydraulic cylinder device, and a connecting member connecting the hydraulic cylinder device and the seven wheels of the wheel; The present invention is characterized in that a hydraulic pressure is controlled by a hydraulic control device so that a desired load is applied to the chassis of the wheel by means of the hydraulic cylinder device.

The present invention will be explained below based on embodiments shown in the drawings.

In Figures @1 to M3, the vehicle 1 has its driving wheels 2 placed on a chassis dynamo 74 installed below the floor 3 to conduct an actual vehicle performance test of the wheels. 9. A hydraulic cylinder device 5 is disposed below the floor 3, and a pair of hydraulic cylinders 6.6 are pivoted vertically upward on both sides of the wheel 10 to the base 7 at the base end 6. is set up. The hydraulic cylinder 6 includes a piston 8 and a piston rod 9, and an upper end 9 of the piston rod 9.
A hook member 11, which is an example of the connecting member C, and a towing member 13 for towing the chassis frame 109 of a truck and the chassis frame 12 of a bus (FIGS. 4 and 5) are respectively fixed to a.

The safety member 15 is attached to the traction member 13 so that, if necessary, the chassis frame 10.12 can be pushed up as the piston rod 9 of the hydraulic cylinder 6 rises. ing.

Furthermore, the safety member 15Fi is urged upward by a compression spring 16 interposed between the safety member 15Fi and the floor 3, and an actuator fixed to the safety member 15 is inserted into the spring d.・
The actuator 17 is fixed to the floor surface 3, and the actuator 1 is fixed to the floor surface 3.
A vehicle height sensor □118 is arranged to detect an abnormal vehicle height of the wheel by being pressed by the vehicle height sensor 7.

The hook member 11 has a lobe 19 which is an example of the connecting member C.
is hung on the hooks 21a at both ends of an angled horizontal member 21, which is an example of the connecting member C, which is placed on the chassis frame IO of the truck via a wooden base plate 20. .

The hydraulic control device 50 includes a hydraulic pump 22 and a pressure setting valve 2.
3, a flow path switching valve 24, an oil pressure gauge 25 as a load meter, an oil tank 26, and oil pipes 27, 28, 29, 30, 31, 32, and 33 that communicate and connect these, respectively.
The oil pipe 29 is connected to the cylinder chamber 6b above the piston 8 of the hydraulic cylinder 6.
3 are connected to the cylinder chamber 6C on the lower side of the histone 8, respectively.

The present invention is constructed as described above, and its operation will be explained below. First, referring to FIGS. 1 to 3, an actual vehicle performance test will be described when the vehicle 1 is a truck. A plywood 20 is placed on the chassis frame IO, and the horizontal member 21 is placed on it, and the hook member 11 is placed on the hook 21a.
The piston rod 9 of the hydraulic cylinder 6 and the horizontal member 21 are connected by hooking one end of the row 119 hooked to the rod 119 . This is done in exactly the same way on the left and right sides of the vehicle.

Next, when the hydraulic pump 22 is operated, under normal conditions, the vehicle height sensor 18 is turned OFF, so the flow path switching valve 24 causes the oil sent from the oil pipe 28 to flow into the oil pipe 29, causing the Cylinder 1i6b of cylinder 6
The oil is pumped into the cylinder chamber 6C, and the oil discharged from the cylinder chamber 6C is discharged into the oil pipe 33, and is then flowed through the oil pipe 30, the pressure setting valve 23, and the oil pipe 31 in this order, and is returned to the oil tank 26. Because
The piston 8 of the hydraulic cylinder 6 descends, and the piston rod 9 pulls the transverse member 21 downwards via the lobes 19.

Then, a load is applied to the chassis frame 10 via the base plate 20. The magnitude of this load is determined by the pressure tt25, so when the hydraulic pump 22 is stopped when the pressure reaches the scheduled load weight, the hydraulic cylinder "6"
is oil-locked and a constant load is always applied to the chassis frame 10, and a corresponding load is also applied from the drive wheels 2 to the chassis dynamo 4. Therefore, driving performance tests can be conducted by starting the engine of the vehicle 1, rotating the drive wheels 2, and rotating the chassis dynamo 4.

When the test is completed, when the flow path switching valve 24 is manually switched, the oil lock of the hydraulic cylinder 6 is released, the piston rod 9 is raised, and the load on the chassis frame IO is removed, so that the horizontal member 21 and the stand are By removing the plate 20, the vehicle can be moved. That is, since the flow path switching valve 24 communicates the oil pipes 29 and 30, the oil in the cylinder chamber 6b is transferred to the oil via 29, the flow path switching valve 24, the oil pipe 30, the pressure setting valve 23, and the oil pipe 31C). Flowing in Jl order mail tank 26
will be returned to.

Next, during a test in which a predetermined load is applied to the vehicle 11C', if one of the tires bursts and the vehicle height becomes abnormally low, the safety member 15 is pushed back against the splash 16 by the chassis frame 10. Pushed down, actuator 17
lowers and turns on the vehicle height sensor 18. Then, the flow path switching valve 24 automatically switches the oil flow path in the opposite direction, so that the oil pressure-fed from the hydraulic pump 22 flows from the oil nozzle 33 into the cylinder chamber 6C of the hydraulic cylinder 6 and moves the piston 8. The piston rod 9 rises rapidly and the load attached to the chassis frame 10 is removed. Oil tank in the cylinder chamber 6b, oil pipe 29,
The oil flows through the flow path switching valve 24, the oil pipe 30, the pressure setting valve 23, and the oil pipe 31 in this order and is returned to the oil tank 26. In this way, even if a tire bursts during a test, the load can be removed without damaging the vehicle or test equipment.

Next, referring to FIGS. 4 and 5, we will explain the actual vehicle performance test of the chassis frame 12 in the case of a bus.
is hidden by the outer skin (not shown), so the load is applied like a truck.

I can't. Therefore, the bottle 34 is inserted into the hole 13M of the traction member 13.
Then, the rope 35 is hung around the bin and the one-seat frame 12 is pulled downward. As a result, the width of the chassis frame 12 changes depending on the vehicle type [2 and 34
This can be easily accommodated by changing the position of the hole 13a. Since the other configurations and functions are quite similar to those of the truck, the same parts are given the same reference numerals in the enlarged drawings and their explanation will be omitted.

Since the present invention is constructed and operates as described above, the drive wheels of a vehicle are placed on a chassis tie demo to perform an actual vehicle performance test of the wheels, and the load on the vehicle is transferred to a hydraulic cylinder. Since it can be added using a device, it is possible to load and unload baggage such as sandbags from the vehicle.
This eliminates the need for testing, significantly reduces the number of man-hours required for testing, and allows the testing to be completed in less time, making work easier and improving work efficiency. Furthermore, during actual bus performance tests, the interior of the bus does not need to be soiled at all.

[Brief explanation of drawings]

The drawings relate to the embodiments of the present invention, and are from wJ1 to @3.
Figure 1 is a general schematic diagram of the device of the present invention, Figure 2 is a perspective view showing how to apply a load to the chassis frame of a truck, and Figure 3 is a diagram showing the method of applying a load to the chassis frame of a truck. Figure 4 is a perspective view showing how to apply a load to the chassis frame of the bus, and Figure 5 is a front view of the main parts. It is. 1 is a vehicle, 2 is a drive wheel, 4 is a chassis dynamo, 5 is a hydraulic cylinder mounted, 10 is a truck chassis frame which is an example of a chassis, 11 is a hook member which is an example of a connecting member, 1
2 is an example of a chassis) Kusu chassis frame, 13d
A traction member 19 is also a rope, 2 is an example of a connecting member.
1 is a horizontal member, 35 is a rope, 50 is a hydraulic control device, and C is a connecting member. Patent applicant: Hino Motors Co., Ltd. Representative Patent Attorney 1) Kazuo

Claims (1)

[Claims] A hydraulic cylinder device, a hydraulic control device for the hydraulic cylinder device, a hydraulic cylinder linter device, and A link connecting the chassis of the vehicle.
The hydraulic sub-hydraulic control device is equipped with
Control and apply the hydraulic press printer to the chassis of the wheel. This is a single 4441 Kawamuka Mukitaka installation, which is characterized by being mad to add a load of i.