JP3017426U - Fan load type power absorber - Google Patents

Abstract

(57) [Summary] [Objective] The present invention is a fan load type power absorption device which is low in price and easy to maintain, and which is suitable for a low output automobile inspection device. Power used for a roller type vehicle inspection device of a two-wheel to four-wheel vehicle and for applying a load to the drive wheel 1a via a roller 3a that rotates in contact with the drive wheel 1a at the time of vehicle inspection of the vehicle 1 to be inspected An absorbing device, which is a fan 7 that rotates in conjunction with the roller 3a at the time of inspection and whose rotational load serves as a load on the drive wheel 1a, and an air flow passage that serves as an air supply passage or an exhaust passage for the fan 7. 8b
Or 8c and an on-off valve 9 for controlling the rotational load of the fan 7 by adjusting the air flow rate in the air flow path 8b or 8c. The fan 7 may also function as a fan that discharges exhaust gas from the vehicle 1 to be inspected.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a fan load type power absorption device which is used in a roller type vehicle inspection device for inspecting various running performances of a two-wheeled vehicle or a four-wheeled vehicle and serves as a drive wheel load of an inspected vehicle.

[0002]

[Prior art]

 As one of the power absorption devices of the roller type vehicle inspection device, the drive wheels of the two or four wheels that are driven by the drive wheels of the vehicle to be inspected and rotated are interlocked with the drive wheels absorbed by using the attraction force of the electromagnet. There is known an elec- tric retarder that converts power energy into heat. In this type of power absorber, it is easy to control the load, but the electromagnetic coil burns out due to heat generation, or the electric resistance of the electromagnetic coil changes due to heat when used for a long time. The device becomes expensive because a separate correction device is required for the correction. Also, this power absorption device has a large drive inertia, and slippage occurs between the tires of the drive wheels and the roller during acceleration and deceleration of the vehicle to be inspected, so it is necessary to take sufficient slip prevention measures on the surface of the roller. Therefore, it is not suitable for use in the inspection equipment of low-power automobiles that require low prices.

[0003] Also, there is a DC motor type power absorption device that uses back electromotive force to absorb power energy of driving wheels, but a DC power supply device, a braking current control device, a heat correction device, etc. are required separately. Therefore, there is a drawback that the device is still expensive.

There is also a water braking type power absorption device that uses a water flow, but this power absorption device is complicated and expensive, and requires maintenance knowledge such as antifreezing and rust prevention, and is unspecified. There are many difficulties in making it available to a large number of ordinary people.

[0005]

The present invention has been made in view of the above-mentioned circumstances, and is a fan load type that is low cost and easy to maintain, and is particularly suitable for a low output automobile inspection device. The purpose of this invention is to provide a power absorption device.

[0006]

[Means for Solving the Problems]

 The fan load type power absorption device of the present invention is used for a roller type vehicle inspection device of a two-wheel vehicle or a four-wheel vehicle, and is connected to the drive wheel at the time of vehicle inspection of an inspected vehicle through a roller that rotates to the drive wheel. A power absorption device for applying a load, a fan that rotates in conjunction with the rollers at least during inspection and whose rotational load becomes the load on the drive wheels, and an air supply channel or exhaust channel for this fan. The problem is solved by a configuration that is provided with an air flow passage and a switching valve that controls the rotational load of the fan by adjusting the air flow rate in this air flow passage. Further, the fan is configured so as to also serve as a fan for discharging exhaust gas of the vehicle under inspection.

[0007]

[Action]

 With this configuration, a power absorption device that has a simple structure and a light fan with less inertia and whose drive wheels are used as a load can be obtained, which is low in cost and easy to handle for maintenance. It is possible to provide a roller-type vehicle inspection device and the like particularly suitable for vehicle inspection of two-wheeled vehicles.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. This embodiment is an example used in a roller type vehicle inspection device for measuring the NOx concentration in the exhaust gas of a two-wheeled vehicle, and FIG. 1 illustrates a roller type vehicle inspection device including the fan load type power absorber of this example. FIG. 6 is a perspective view including a partially broken portion for performing

In FIG. 1, reference numeral 1 denotes a two-wheel vehicle to be inspected, which is fixedly held on a floor 2 of a roller-type vehicle inspection device for exhaust gas inspection. Driving wheels 1 a of the vehicle to be inspected 1 have a floor of the floor 2. It is installed on the machine frame 2a provided below and is placed on the roller 3a and the roller 3b of the roller type vehicle inspection device in which only a part of the upper part is exposed to the floor 2. The driven wheel 1b is fixed by a driven wheel stopper 2b provided on the floor 2, and the vehicle 1 to be inspected is vertically fixed and held at a predetermined position on the floor 2.

Further, on the floor 2 of the roller type vehicle inspection device, there are provided operation switches for performing a series of inspections of the automobile 1 to be inspected and a control box 4 for displaying operating conditions and measured values. Further, this roller type vehicle inspection device is provided with an exhaust gas measuring device (not shown) for measuring the NOx concentration in the exhaust gas of the vehicle 1 to be inspected.

The rollers 3a and 3b of the roller-type vehicle inspection device are driven by drive wheels 1a so as to be freely rotatable. Between the rollers 3a and 3b, two wheels of the vehicle 1 to be inspected may come and go. For the sake of simplicity, a lift 3c is provided for braking the rotation of the rollers 3a, 3b and for lifting the drive wheel 1a of the automobile 1 to be inspected from the recess between the rollers 3a and 3b. Further, of the rollers 3a, 3b, the extended rotation shaft 3d of the roller 3a is connected to a rotation sensor 5 for measuring the speed of the drive wheel 1a via the rotation speed of the roller 3a via a chain 5a. The rotating shaft 3d extends through the torque sensor 6 and is connected to the fan 7 through pulleys 7a and 7b and a belt 7c. With such a mechanism, the fan 7 is rotationally driven by the drive wheel 1a.

The fan 7 is of a rotary vane type for discharging the exhaust gas discharged from the exhaust pipe 1c of the vehicle 1 to be inspected and sent through the exhaust duct 8a and the suction duct 8b to the outside through the exhaust duct 8c and the discharge pipe 8d. Is a fan of. Further, in this embodiment, the fan 7 absorbs the rotational energy of the drive wheel 1a by the air blowing operation of sending the air containing the exhaust gas sent from the suction duct 8b to the exhaust duct 8c and the power load of the drive wheel 1b. It also has a role to be. That is, an opening / closing valve 9 for adjusting the flow rate of the air containing the exhaust gas passing through the suction duct 8b is provided at a required position of the suction duct 8b, and the air flow rate is adjusted by turning the handle 9a so that the fan 7 can be operated. Is controlled, which in turn controls the power load on the drive wheels 1a. The handle 9a can be operated by hydraulic or electric operation according to an instruction from the control box 4, or directly by manual operation. The open / close valve 9 may be provided on the exhaust duct 8c side.

Next, a series of vehicle inspection operations by the roller type vehicle inspection device configured as described above will be described. The two-wheeled vehicle 1 to be inspected enters from the direction of the exhaust duct 8a. At the time of this entry, the exhaust duct 8a is lowered flush with the floor surface of the floor 2 so as not to hinder the movement of the vehicle 1 to be inspected, and is automatically lifted from the floor surface by the measurement operation. When the center of the drive wheel 1a comes to the position of the lift 3c and the measurement start button of the control box 4 is pressed, the lift 3c is lowered and at the same time the brakes of the rollers 3a and 3b are released. Further, the exhaust duct 8a automatically rises from the floor surface of the floor 2 and is set at the measurement position. The driven wheel 1b of the vehicle 1 to be inspected, which is positioned by the operation of the next fixed operation button, is fixed by the driven wheel stopper 2b so that the vehicle 1 to be inspected does not jump forward during the measurement, and the preparation for inspection is completed.

When the engine of the automobile 1 to be inspected whose inspection preparation is completed is started, the rollers 3a and 3b rotate via the drive wheels 1a, and the rotational force of the drive wheels 1a is transmitted to the fan 7 so that the fan 7 also rotates. To do. Exhaust gas discharged from the exhaust pipe 1c of the vehicle 1 to be inspected when the engine is started is discharged to the outside by the fan 7 through the exhaust duct 8a, the suction duct 8b, the discharge duct 8c and the discharge pipe 8d, and the roller type vehicle inspection is performed. The environment inside the device can be kept clean.

At the initial non-measurement time when the engine is started, the load on the vehicle 1 to be inspected is preferably as small as possible. Therefore, the on-off valve 9 is closed to the extent that it does not hinder the emission of exhaust gas, and the load on the drive wheels 1a is lightened. And place it. When measuring the NOx concentration, in order to achieve the two-wheeled vehicle traveling speed and load amount specified in the measurement regulations, the traveling speed is monitored by the speed output from the rotary sensor 5 and displayed on the speedometer of the control box 4. While changing the acceleration, the opening and closing of the on-off valve 9 is adjusted while observing the load amount output from the torque sensor 6 and displayed on the load meter of the control box 4. When the specified traveling speed and load are set, the NOx concentration in the exhaust gas is measured and the inspection is completed. When the inspection is completed and the inspection end button of the control box 4 is pressed, the lift 3c lifts the lift-up drive wheel 1a, and at the same time, the rollers 3a and 3b are braked and fixed. Further, the driven wheel 1b is released from the driven wheel stopper 2b, and the vehicle 1 to be inspected can be moved to the outside of the roller type vehicle inspection device.

It should be noted that the present invention is not limited to the above-mentioned embodiment, and can be modified and implemented within the scope not changing the gist. In the embodiment, the device in which the low-powered two-wheeled vehicle is used as the vehicle to be inspected has been described, but in the case of the four-wheeled large-sized vehicle, the roller width is widened corresponding to the vehicle body and the fan capacity is adjusted according to the output. You can select a large fan or use multiple fans in conjunction. Further, when the output difference of the vehicle to be inspected is large and it is desired to process with one fan, it is desirable to use a fan that can change the angle of the rotating blades.

Further, in the above-described embodiment, the embodiment in which the exhaust gas discharge fan also serves as the load fan for absorbing the power of the drive wheels has been described. However, the gist of the present invention is to use the exhaust gas discharge fan as a fan. It is also possible to independently provide load fans for absorbing power.

In this embodiment, the rotation of the fan depends only on the rotation of the roller. However, in the case where the fan is used for both exhaust gas emission and power absorption, rotation other than during inspection is performed electrically. It can also be implemented by a motor or the like.

[0019]

[Effect of device]

 According to the fan load type power absorption device of the present invention, the following effects can be expected. a. Since the fan is used as a load, the structure is extremely simple, and since no water is used, maintenance is easy regardless of temperature. b. Since a light fan is used as the load, the inertia is small and no slip measures are required. However, it is economical in that load control can be done manually. Especially, it is effective as an inspection device for low output automobiles that require low cost. Can be used c. Since the device is open, it generates less heat and can be used for a long time. d. Since it is a system that controls the flow rate of air supplied to the fan, a very smooth low load increase / decrease is possible, and a device suitable for testing low-power vehicles can be provided. e. Since the exhaust gas discharge fan of the vehicle under inspection can also function as the load fan of the power absorber, the initial cost, running cost and installation space of the power absorber can be significantly reduced.

[Brief description of drawings]

FIG. 1 is a perspective view including a partially broken portion of a roller type vehicle inspection device using a fan load type power absorption device according to an embodiment of the present invention.

[Explanation of symbols]

1 ... Inspected vehicle, 1a ... Drive wheels 1a, 1b ... driven wheels,
1c ... Exhaust pipe, 2 ... Floor, 2a ... Machine frame, 2b ... Driven wheel stopper, 3a, 3b ... Roller, 3c ... Lift, 3d ... Rotation axis, 4 ... Control box, 5 ... Rotation sensor, 5a ... Chain, 6 … Torque sensor, 7… Fan, 7
a, 7b ... Pulley, 7c ... Belt, 8a ... Exhaust duct, 8b ... Suction duct, 8c ... Exhaust duct, 8d ... Exhaust cylinder, 9 ... Open / close valve, 9a ... Handle.

Claims (2)

[Scope of utility model registration request] 1. Power absorption for use in a roller type vehicle inspection device for a two-wheel to four-wheel vehicle, etc., for applying a load to the drive wheels through rollers that rotate in contact with the drive wheels during vehicle inspection of the vehicle to be inspected. An apparatus, comprising: a fan that rotates in conjunction with the roller at least during the inspection, the rotational load of which serves as a load on the drive wheel; and an air flow path that serves as an air supply flow path or an exhaust flow path for the fan, An on-off valve for controlling the rotational load of the fan by adjusting an air flow rate in the air flow path, and a fan load type power absorption device. 2. The fan load type power absorber according to claim 1, wherein the fan also serves as a fan for discharging exhaust gas of the vehicle to be inspected.