JPH11287732A - Driving apparatus at testing apparatus realizing smooth speed pattern - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a smooth acceleration pattern even from the driving of an engine without using an electric motor of large power by transmitting a drive rotation of the engine to a load of a testing apparatus via a variable-speed drive of a specific constitution. SOLUTION: A drive rotation of an engine 1 is transmitted to a load of an impact-testing apparatus via a variable-speed drive. The variable-speed drive is constituted of a hydraulic/mechanic change gear (HMT) 3 which is a combination of a mechanic deceleration mechanism and a hydraulic transmission mechanism. The mechanic deceleration mechanism mechanically decelerates the drive rotation of the engine 1 and transmits to the load. The hydraulic transmission mechanism accumulates the rotation of the engine as a hydraulic force by a capacity variable hydraulic pump, and transmits a rotation force of a hydraulic motor driven and rotated with the use of the hydraulic force to the load via the mechanical deceleration mechanism. An output of the engine 1 is split by a splitter 8, one being utilized at the HMT 3 for driving the testing apparatus 5 and the other being connected to a generator 6 to be used for an illumination or the like via a frequency converter 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driving apparatus for a test apparatus for realizing a smooth speed pattern (rotational speed, running speed, etc.) such as an automobile collision test apparatus.

[0002]

2. Description of the Related Art An automobile crash test apparatus is used to actually cause an automobile to collide with a collision wall, an automobile, a guardrail, a curb, a utility pole, and the like, and the structure and repairability of the automobile, the effects of on-vehicle equipment such as airbags and seat belts, and the like. It is used for the purpose of measuring and evaluating the injuries of passengers and verifying the accident, but it is extremely dangerous to carry out a manned test with a test driver on a test vehicle.

For this reason, as shown in FIG. 5A (FIG. 5 shows a test apparatus incorporating the present invention, the prior art part thereof will be described), it is provided so as to face the collision wall 61. A traveling rail 65 is laid on the test vehicle traveling path 64, and a towing dolly 67 having a test vehicle 66 mounted thereon is mounted on the traveling rail 65.
And a pulling wire 68 attached to the pulling dolly 67 is wound at a predetermined rotation speed by a wire winding drum 52 incorporated in the collision test apparatus 5. Then, the test vehicle 66 is moved on the traveling rail 65 via the towing dolly 67 by the wire winding drum 52 to a constant speed while being accelerated by a predetermined acceleration pattern shown in, for example, FIG. The various tests described above are performed upon collision.

As shown in FIG. 4, the acceleration pattern is such that the acceleration (K) is increased in an arithmetic progression (A), the acceleration (K) is reduced after the initial speed (K ₁ ) is reduced, and There are a series (B) in which the speed is increased in a series, and a series (C) in which the initial speed is lowered and a curved acceleration curve is set so as to be accelerated while searching at a constant speed (K ₂ ). In order to put a dummy doll on the test vehicle 66 instead of a human to measure the injury value of the rider on the test vehicle 66, it is necessary to maintain the posture of the dummy doll during acceleration,
In the automobile collision test, an acceleration pattern for smoothly accelerating the test vehicle 66 is set. For this reason, several speed sensors 62 are installed in the middle of the traveling path 64 of the above-mentioned vehicle collision test apparatus 5, and if it is found that the vehicle is not traveling in a predetermined acceleration pattern, the test vehicle Stop 66.

[0005] For this reason, in the collision test apparatus 5, in order to accurately control the rotation of the wire winding drum 52 incorporated in the apparatus, a driving device for the wire winding drum 52 of the conventional collision test apparatus 5 is provided. As shown in FIG.
A motor drive system that controls the rotation of the motor 103 while controlling the electric power obtained from the control unit 1 with the control device 102 is employed.

[0006]

However, in such a conventional drive system, the load on the towing dolly 67 on which the test vehicle 66 is mounted is extremely large, and the driving power of the winding drum 52 is required to obtain an accurate acceleration pattern. Inevitably, large equipment requiring such large power requires large power consumption of the equipment, and therefore has a drawback that the contract power of the commercial power supply becomes extremely large. Therefore, equipment that only uses for a few tens of seconds a day,
Even for equipment that is used less frequently, the contract power must be set to correspond to the maximum use, and a large basic power rate must be paid. In addition, the power distribution board 101 for supplying electric power to the electric motor 103 is inevitably large, and when newly installing the power distribution board 101, there is a disadvantage that initial investment cost is increased.

The present invention has been made in view of the above problems, and provides a driving apparatus for an automobile collision test apparatus and other test apparatuses which can realize a smooth acceleration pattern even when an engine is driven without using a motor having a large power. Aim.

[0008]

According to the first aspect of the present invention,
In a drive device of a test device that realizes a smooth speed pattern (rotation speed, running speed, etc.) as in the vehicle crash test device, the drive rotation of the engine can be transmitted to the load of the test device via a continuously variable transmission. With the configuration, the continuously variable transmission mechanically reduces the drive rotation of the engine and transmits the load to the load, and a hydraulic pump capable of variable displacement of the rotation of the engine is accumulated as hydraulic pressure, A hydraulic / mechanical transmission (hereinafter referred to as HMT) comprising a combination with a hydraulic transmission mechanism for transmitting the rotational force of a hydraulic motor driven and rotated using the hydraulic pressure to the load via the mechanical deceleration mechanism. It is characterized by the following.

According to a second aspect of the present invention, a generator is provided on the output shaft side of the engine in parallel with the continuously variable transmission.
Alternatively, a generator is provided in series between the engine and the continuously variable transmission.

The present invention uses an engine (gas turbine engine, diesel engine, etc.) instead of an electric motor as a drive source for driving the load of a test device such as the wire winding drum 52, so that it takes several tens of seconds a day. It is not necessary to pay a large contracted basic charge corresponding to the maximum use even for equipment that only uses the equipment or equipment that is used less frequently, and the engine only needs to be driven when performing tests, enabling efficient energy use. Becomes Also, not using the electric motor eliminates the need for a large power distribution board at all,
Lower initial investment costs.

However, when an engine is used, it is difficult to realize a smooth speed pattern (rotational speed, running speed, etc.) as in the automobile crash test apparatus.
Therefore, the present invention is configured to be able to transmit the driving rotation of the engine to the load of the test device via a continuously variable transmission,
Particularly, the present invention is characterized in that the continuously variable transmission is constituted by a hydraulic / mechanical transmission (hereinafter, referred to as HMT) composed of a combination with a hydraulic transmission mechanism that transmits the load to the load via the mechanical reduction mechanism.

That is, for example, in the vehicle collision test apparatus, a wide range of speed change from "0" km / h to about 100 km / h is required, and an arbitrary speed ratio and an arbitrary speed ratio are required to obtain an accurate acceleration pattern. High torque amplification ratio is required. As the continuously variable transmission, a transmission with a torque converter is generally used. However, since the output shaft rotation speed is automatically determined according to the load, the transmission cannot take an arbitrary speed ratio. Therefore, it is not suitable for an automobile crash test apparatus that requires a high load during acceleration. Also, there is a hydraulic transmission HST (Hydrostatic Transmission) that combines a swash plate type hydraulic pump and a hydraulic motor and performs gear shifting while rotating the hydraulic motor based on the hydraulic pressure accumulated by the hydraulic pump. Transmission efficiency is inferior to that of a transmission with a torque converter and an HMT described later, and a wide range of shifts and an accurate acceleration pattern cannot be obtained.

[0013] On the other hand, the present invention provides a hydraulic pressure control device that mechanically reduces the drive rotation of an engine and transmits the drive rotation to the load, and a hydraulic pump capable of changing the rotation of the engine. And a hydraulic / mechanical transmission (HMT) comprising a combination with a hydraulic transmission mechanism that transmits the rotational force of a hydraulic motor that drives and rotates using the hydraulic pressure to the load via the mechanical deceleration mechanism. And controlling the rotation of the engine that is driven and rotated at the steady rotation speed while varying the accumulated pressure by changing the capacity of the hydraulic pump, and further controlling the rotation of the hydraulic motor that rotates based on the accumulated pressure by a mechanical deceleration mechanism. The transmission is transmitted to the load via the motor, so that a high load and an arbitrary speed ratio can be obtained.

Further, since the drive rotation of the engine is configured to be directly transmitted to the mechanical reduction mechanism together with the hydraulic transmission mechanism, both the mechanical reduction mechanism and the hydraulic transmission mechanism can be transmitted to the load in parallel and simultaneously. Thus, higher load transmission is possible, and fluctuations on the load side are absorbed, and a precise acceleration pattern is obtained.

Since the tester does not always operate at full load, there may be a margin in the output of the engine during the test operation, which may result in reactive energy. Therefore, a second aspect of the present invention is to mount a generator on the output side of the engine, recover the reactive energy as electric energy, and use the reactive energy for lighting of a test machine or the like. That is, the present invention is characterized in that a generator is provided in parallel with the continuously variable transmission on the output shaft side of the engine, or a generator is provided in series between the engine and the continuously variable transmission. .

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will now be described in detail with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention unless otherwise specified, and are merely illustrative examples. Only.

FIG. 1 is a block diagram showing a drive system of an automobile crash test apparatus 5 according to an embodiment of the present invention. The power source is an engine 1 (gas turbine engine, diesel engine, etc.), and the output is a splitter (single shaft input). / Two-shaft output transmission system) 8 to split one of the output shafts into the HMT 3 that controls the drive of the wire winding drum 52 of the automobile crash test device 5 and the other output shaft into the generator 6
After converting the electromotive force of the generator 6 to a frequency corresponding to the commercial power supply by the frequency converter 7 or the like, the apparatus is configured to be usable for lighting of a test machine or the like.

In the figure, reference numeral 2 denotes an engine control device for controlling start / stop, output / rotational speed, etc. of the engine 1, which keeps the engine output at a constant speed. 4 is an HMT controller,
The speed sensor 62 and the actual traveling speed (encoder rotation speed described later), the vehicle weight, the collision speed,
The output rotation speed of the HMT 3 is controlled by taking in initial values such as an acceleration pattern and the output and rotation speed of the engine 1 from the engine control device 2 side.

Therefore, according to this embodiment, the output speed of the HMT 3 can be controlled by the control device 4 while the output of the engine 1 is kept at a constant speed, and the generator 6 is operated at the same time, so that during the test, Power can be supplied to lighting and the like required for the vehicle. In order to operate the generator 6, it is necessary to keep the input rotation speed to the generator 6 constant.
A system that simultaneously supplies the power required for the crash test while supplying variable speed power to the crash test device 5 while keeping the engine output speed constant by combining the engine 1, the HMT 3, and the generator 6. Become. As a result, if a facility that consumes a large amount of power, such as an automobile crash test apparatus 5, is a facility that uses a small amount of time and has a small number of uses, and is a system that is a direct extension of the conventional system, the power company will
Although it was necessary to pay a large amount of money only for the basic power charge, in this embodiment, the power source is the engine 1 and the engine output is split by the splitter 8 and one of the power is set to H.
By connecting the MT3 to the generator 6 at the other end, externally supplied power can be minimized or completely eliminated, and when completely eliminated, it can be used as a power generation facility when testing is not performed. Power supply from outside can be eliminated.

FIG. 3 is a schematic configuration diagram of the HMT used in the present embodiment. The detailed configuration is disclosed in Japanese Patent Application No. 9-355700 previously filed by the present applicant, so that only the schematic configuration will be described. In this embodiment, a gas turbine engine is used as the engine 1, and a gas turbine engine control device is used as the engine control device 2. The HMT control device 4 detects the rotation speed of the variable displacement hydraulic pump 12 of the HMT 3 via the resolver 13 together with the set values such as the vehicle weight, the collision speed, and the predetermined acceleration pattern. The actual vehicle traveling speed is detected by the speed sensor 62.

The HMT controller 4 controls the swash plate angle of the hydraulic pump 12 via the servo valve 11 based on the input signal to control the displacement of the hydraulic pump 12. The HMT control device 4 controls the clutch 51 and the brake 53 of the crash test device 5 while comparing the acceleration pattern with the signal from the encoder. HMT3 is resolver 1
3, a variable displacement hydraulic pump mechanism 10 including a servo valve 11 and a swash plate type hydraulic pump 12, a planetary reduction mechanism 20 including a sun gear 23, a ring gear 21, and a carrier 22,
And a hydraulic motor 15 that rotates under the hydraulic pressure of the hydraulic pump 12 and transmits the output to the ring gear 21 via the clutch 33.

The output from the gas turbine engine 1 can be transmitted to the hydraulic pump 12 and the sun gear 23 via clutches 31 and 32, respectively. According to this embodiment, the clutch 51 is selectively turned ON / OF.
F to set the hydraulic mode, hydraulic pressure /
Machine mode, deceleration as machine mode is possible.

That is, in the case of the automobile collision test apparatus 5, as shown in FIG.
A test device including an MT3, a clutch 51, a wire hoisting drum 52, and a brake 53 is provided.
A traction dolly 67 on which a test vehicle 66 is mounted is disposed thereon, and a traction wire 68 attached to the traction dolly 67 is incorporated in the collision test apparatus 5 to form a wire winding drum 5.
For example, first, the start is performed in the hydraulic mode, the clutch 32 on the mechanical mode side (the sun gear 23) is disengaged, the clutch 31 on the hydraulic pump 12 is connected, and the swash plate is controlled by the servo valve 11. The hydraulic pump 12 is rotated in a state where the inclination angle of the hydraulic pump 12 is minimized, and the hydraulic motor 12 is gradually rotated in the course of increasing the hydraulic pressure having a small inclination degree, and the rotational force is transmitted through the planetary reduction mechanism 20 through a wire. It is transmitted to the winding drum 52.

As a result, since the increase in the oil pressure is very small, the engine 1 does not stall, and a slow and smooth initial speed can be achieved. Thereafter, smooth acceleration is performed while gradually increasing the tilt angle of the swash plate with the servo valve 11 while increasing the hydraulic pressure due to the increase in the rotation of the hydraulic pump 12. Then, the clutch 32 on the mechanical mode side (sun gear) is connected and acceleration is performed in the hydraulic / mechanical mode while increasing the torque. If a higher torque is required, the clutch 31 on the hydraulic pump 12 side is disengaged, and the operation is performed only in the mechanical mode.

When deceleration by the braking action is intended, the inclination of the swash plate is set to "0" by the servo valve 11, and the pumping action of the hydraulic pump 12 is stopped. As a result, on the hydraulic motor 15 side, it can rotate by rotation from the load side (the wire winding drum 52) to perform a pumping operation and obtain a braking effect by accumulation of hydraulic pressure. As a result, FIG.
If the vehicle deviates from the target speed as shown in FIG.
Braking can be performed on the third side.

Therefore, several speed sensors 62 are installed in the middle of the traveling path of the vehicle collision test apparatus 5, and the vehicle travels in a predetermined acceleration pattern in the various modes, but the HMT output rotation is decelerated. HMT3
By absorbing the power, the test vehicle 66 can be braked. Therefore, since the HMT 3 can be used for braking, the brake (disc brake or the like) installed in the facility can be eliminated by the braking function of the HMT 3.

[0027]

As described above, according to the present invention, there is provided a driving apparatus for an automobile collision test apparatus and other test apparatuses capable of realizing a smooth acceleration pattern even when an engine is driven without using a high-power motor. Can be obtained. According to the second aspect of the present invention, a generator is mounted on the output side of the engine, and the inactive energy is recovered as electric energy, which can be used for lighting of a test machine or the like.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a drive system of an automobile collision test apparatus according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a drive system of a vehicle collision test apparatus according to the related art.

FIG. 3 is a schematic configuration diagram of an HMT according to the present embodiment.

FIG. 4 shows an acceleration pattern of an automobile collision test apparatus.

FIG. 5A is an overall system diagram of an automobile collision test apparatus, and FIG. 5B is an acceleration pattern.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 engine 2 engine control device 3 HMT (hydraulic / mechanical transmission) 4 HMT control device 5 collision test device 6 generator 7 frequency converter 8 splitter 12 hydraulic pump 15 hydraulic motor 20 planetary reduction mechanism 31, 32, 33, 51 clutch 52 wire drum

Claims (2)

[Claims] 1. A driving device for a test device which realizes a smooth speed pattern (rotation speed, running speed, etc.), wherein a drive rotation of an engine is transmitted to a load of the test device via a continuously variable transmission. A mechanical deceleration mechanism for mechanically decelerating the driving rotation of the engine and transmitting the driving rotation to the load, and a hydraulic pump capable of changing the rotation of the engine as a hydraulic pressure, and accumulating the hydraulic pressure as the hydraulic pressure. And a hydraulic / mechanical transmission (hereinafter referred to as HMT) comprising a combination with a hydraulic transmission mechanism for transmitting the rotational force of a hydraulic motor driven and rotated to the load via the mechanical deceleration mechanism. Drive device. 2. A generator is provided on the output shaft side of the engine in parallel with the continuously variable transmission, or a generator is provided in series between the engine and the continuously variable transmission. Drive.