JP2002181667A - Chassis dynamometer and sequence control method for chassis dynamometer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chassis dynamometer and a sequence control method for the chassis dynamometer capable of securing safety in each work related to an automatic cover covering a roller and inexpensively detecting an existence of an automobile without any exclusive area sensors. SOLUTION: In this chassis dynamometer, the roller 3 is attached to a main spindle of a dynamo body 2 provided with a motor, driving wheels 11 of the automobile 1 are mounted on a circumferential face of the roller 3 via an opening 6 formed in a portion of a floor plate overlapping the roller 3, and the roller 3 is rotated by drive of the driving wheels 11. A roller cover covering the roller 3 is provided, the roller cover is composed of the slide type automatic cover 20, and a contact sensor 22 detecting the contact of an object is provided on a tip 20a of the automatic cover 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chassis dynamometer used for performing a performance test (test) of an automobile and a sequence control method in the chassis dynamometer.

[0002]

2. Description of the Related Art The present applicant places a drive wheel of an automobile on the peripheral surface of a roller through an opening formed in a portion of the floorboard that overlaps the roller, and drives the vehicle. In a chassis dynamometer for performing a test by rotating the roller by driving a wheel, a roller cover that covers the roller by closing the opening is provided, and the roller cover is configured by a slide type automatic cover, A chassis dynamometer has been proposed in which the opening is closed by an automatic cover when no driving wheel is mounted on the vehicle (see Japanese Patent Application No. 11-165380, the drawings. Absent).

[0003] More specifically, the automatic cover is used to prevent the accident of being caught in the idle operation of the roller for rotating the roller for warm air or the like in a state where the driving wheel is not mounted, or when the test is not performed. In addition to the role of closing the opening as described above, it also plays a role of covering a part of the roller during a test performed while driving the drive wheels. The automatic cover is configured to be automatically stopped by the position detecting means at both ends of the opening / closing operation in order to prevent the automatic cover from being caught by an object beyond the operation range.

Further, the automatic cover is provided with a contact sensor for detecting contact of an object with the tip for safety confirmation in each operation, and the automatic cover hits an obstacle within the slidable operating range. Then, it is configured to stop after retreating by a set amount. Therefore, it is possible to prevent a person from being injured or from being damaged.

[0005] By the way, a human being may drive a test vehicle, but a robot is mounted on the vehicle, a remote control device and various sensors are used as a part of the fully automatic driving. A photoelectric area sensor including a pair of light-emitting elements and a light-receiving element is installed at the position of the floor plate so as to sandwich the opening. For example, a test work is performed by placing a driving wheel on the peripheral surface of the roller. When it is desired to perform the operation, whether or not the drive wheel is positioned on the roller is detected based on whether or not the light emitted from the light emitting element is blocked. In addition, even if it is desired to perform idle operation of the rollers, the presence or absence of a vehicle is detected in advance by the area sensor, and when it is confirmed that the vehicle is not present, the remote control device covers the rollers with the automatic cover. With the automatic cover closed, the opening is closed with the automatic cover.

[0006]

However, the provision of an area sensor for detecting the presence or absence of an automobile is one of the factors that hinder the work. Also, area sensors are expensive.

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above-described problems, and has as its object to ensure safety in each operation involving an automatic cover that covers a roller and to eliminate the need for a dedicated area sensor. An object of the present invention is to provide a chassis dynamometer capable of detecting the presence or absence of an automobile at low cost and a sequence control method in the chassis dynamometer.

[0008]

According to the present invention, a roller is mounted on a main shaft of a dynamo body provided with a motor, and an opening formed in a portion of the floorboard overlapping with the roller is provided. In a chassis dynamometer in which a driving wheel of an automobile is mounted on the peripheral surface of the roller and rotates the roller by driving the driving wheel, a roller cover that covers the roller is provided, and the roller cover is a slide-type automatic cover. And a contact sensor for detecting contact of an object with the tip of the automatic cover.

According to another aspect of the present invention, a roller is attached to a main shaft of a dynamo main body provided with a motor, and a driving wheel of the vehicle is connected to the roller through an opening formed in a portion of the floorboard overlapping the roller. Placed on the circumference of
The roller is rotated by driving a driving wheel, and a roller cover for covering the roller is provided. The roller cover is constituted by a slide-type automatic cover, and further, it is detected that an object comes into contact with a tip of the automatic cover. A sequence control method in a chassis dynamometer provided with a contact sensor, comprising: at least a step of detecting an open / closed state of the automatic cover with respect to the opening; and temporarily closing the automatic cover when the automatic cover is open. A step of sliding in the direction and determining whether or not the vehicle is present by the contact sensor is automatically performed at the start of the sequence. A sequence control method in a chassis dynamometer is provided.

[0010]

Embodiments of the present invention will be described below.

FIG. 1 to FIG. 6 show one embodiment of the present invention. The present invention and Japanese Patent Application No. Hei.
The difference from the invention described in the specification and the drawings is the function of the contact sensor provided at the tip of the automatic cover. That is, the contact sensor provided at the tip of the automatic cover according to the present invention includes the "function for confirming safety at work" described in the specification of Japanese Patent Application No. 11-165380 and the drawings "existence or absence of an automobile". A function for detecting the "" is newly added.

1 to 6, reference numeral 1 denotes an automobile, and in this embodiment, a front-wheel drive vehicle is employed. Reference numeral 2 denotes a dynamo main body of a chassis dynamometer set to be accommodated in the pit P. Reference numerals 3 and 3 denote rollers attached to both ends of the main shaft 2a of the dynamo main body 2, and reference numeral 4 denotes a top of the roller 3.

Reference numeral 5 denotes a floor plate as a pit cover. Openings 6 and 6 for exposing the rollers 3 and 3 are formed in a portion of the floor plate 5 where the rollers 3 overlap. 7 is
This is a load cell for measuring the torque of the roller 3.

Reference numeral 10 denotes a centering device. The functions of this centering device 10 are as follows. In FIG. 1, for example, the operating arms 13, 13 are slid upward by driving the air cylinders 12, 12, and the rollers 14, 14 located at the wheel release positions a, a under the floor plate 5, are moved to the top 4. Is raised to the wheel setting positions b, b (see FIG. 2) on the upper side of the drive wheel 11, and the drive wheel 11 is fitted between the rollers 14, 14 at the positions b, b. It is placed on the roller 3 while being supported by. During this mounting, the roller 3 is slowly rotated (for example, 5
jogging of the drive wheel 11 in the state of being supported by the rollers 14 while rotating at a low speed of km / h).
Line D connecting the body leaning left and right to the front and rear of the body (see Fig. 1)
Are positioned straight in the front-rear direction along the center line C of the single-axis chassis dynamometer shown in FIG. regulate. 14．
Reference numeral 14 denotes a rail for the tire stoppers 13a. Then start the test.

In this case, if the driving wheel 11 mounted on the top 4 of the roller 3 is driven without performing the jogging operation, the driving wheel (tire) 11 is not only damaged, but in the worst case, the non-driving wheel 12 is not used. , 12 are disengaged from the rails 14.14 and the vehicle body jumps out, which is very dangerous.

Reference numerals 20 and 20 denote automatic sliding roller covers (automatic covers) having a length S and an operating range R
(See FIG. 6), and the material is, for example, an iron plate. As shown in FIG. 6, the automatic cover 20 has a function of preventing the roller 3 from being caught when the roller 3 is idling, preventing an accident, and closing the opening 6 when a test is not performed. It also plays a role of covering a part of the roller 3 at the time of the test for driving the drive wheel 11.

That is, in FIG. 6, before the test is started, the automatic cover 20 covers the range Q outside the drive wheel 11 with a distance d of about 50 mm from the drive wheel 11. In addition, 65 and 65 are safety fences.

Hereinafter, the automatic cover 20 and the configuration surrounding the automatic cover 20 will be described.

First, in this embodiment, the automatic covers 20, 20 are retracted to the left and right (see FIG. 3) when not in use. Thereby, the front and rear length of the pit P can be shortened.

Reference numerals 21 and 21 denote iron fixed covers in which the automatic covers 20, 20 are retracted and accommodated.

The automatic covers 20, 20 may be retracted in the front and rear direction (see FIG. 3) when not in use. Thereby, the width (length in the left-right direction) of the pit P can be reduced.

The power source of the automatic cover 20 is an electric motor of an electric control, and the power transmission mechanism is such that the automatic cover 20 is slid with respect to one automatic cover 20 by a pair of racks 27, 27 and a pinion 26, 26 mechanism. It is composed.

The reason why the electric motor type is adopted is that the automatic cover 20 is used.
This is because stop and retreat during the slide can be easily controlled. In FIG. 4, 25 is one electric motor, 26
Is a pair of pinions, 27 is a pair of racks, and 28 is a single power transmission shaft. In this case, since one pinion 26 is driven by one electric motor 25, fine control can be performed.

Further, the automatic cover 20 has the opening 6
The automatic cover 20 has such strength that the vehicle can be put on the automatic cover 20 when the vehicle is closed.

For this reason, the drive wheels 11 are mounted on the automatic cover 20 to perform idle operation such as warm air.

The automatic cover 2 closing the opening 6
The vehicle 1 can be moved through the top of the vehicle.

When the vehicle 1 is lifted by the jack 31, the floor plate 5 of the portion (the sub-frame 80 on the side of the driving wheel 11 of the suspension of the vehicle 1) which the jack 31 contacts has a strength enough to withstand the jack 31.
An iron plate is used as in the automatic cover 20.

With such a configuration, the driving wheels 11, 11 can be mounted on the automatic cover 20 to perform idle operation such as warm air without temporarily retreating the automobile 1 from the test position and without releasing the tire stopper.

A portable garage jack 3
1 instead of a jack that lifts the car 1
If it is installed in advance in the sub-frame 80, it is not necessary to carry the sub-frame 80 to the sub-frame 80, so that the idle operation can be performed more easily.

A chamfer (slope) 50 is provided on the rail 30 of the automatic cover 20. The chamfered portion 50 is provided in the moving direction of the automobile 1, that is, in the front-back direction. This means that if the rail 30 protrudes toward the floor plate 5, the car 1
Is not easy to move.

The fixed cover 21 is also provided with a chamfer (slope) 51. This chamfered portion 51 is also used for the automobile 1
Are provided in the moving direction. This is also because the chamfered portion 51 cannot easily move the automobile 1 if the fixed cover 21 protrudes toward the floor plate 5.

The rollers 14, 1 of the centering device 10
4, the automatic cover 20 does not close the opening 6, that is, the automatic cover 20 is
1 is adopted. That is, when the automatic cover 20 closes the opening 6, the rollers 14,
A configuration is employed in which each command is controlled so that the number 14 does not rise.

For example, in order to avoid a malfunction in which the automatic covers 20, 20 are slid in the direction (B direction, B 'direction) in which the openings 6, 6 are closed while the rollers 14, 14 are raised, the remote control device 32 Rises rollers 14,14
A [CRADLE] key 33 for lowering is provided, and an automatic cover 2 for opening and closing the openings 6 and 6 is provided.
Opening / closing ON / OF for sliding operation of 0, 20
Slowly rotate rollers 3 and 3 with F switch and centering device raised (for example, low speed rotation of 5 km / h)
A remote control device 32 is provided with a [JOG / COVER] key 34 which also serves as an ON / OFF switch for jogging for positioning the vehicle body straight while causing the vehicle body to swing.

If an open / close ON / OFF switch and a jog ON / OFF switch constituting the [JOG / COVER] key 34 are separately provided on the remote controller 32, for example, the [CRADLE] key 33 is turned on. Although the rollers 14 are raised, there is a possibility that an erroneous operation of turning on the open / close ON / OFF switch among the two switches may occur. In this case, the automatic cover 20 slides in the direction in which the opening 6 is closed, and the automatic cover 20 hits the rollers 14. However, in the present invention, since the ON / OFF switch for opening and closing and the ON / OFF switch for jogging are included in one [JOG / COVER] key 34, the [CRADLE] key 33 is turned on and the rollers 14, 14 are turned on. As long as [JOG / COVE
When the [R] key 34 is pressed, only the operation of stopping and operating the roller 3 is necessarily performed, so that malfunction can be reliably avoided.

As a result, the automatic cover 20 and the centering device 10 can be prevented from being damaged or bitten by mutual interference, and the remote control device 32 can be downsized.

Hereinafter, the characteristic configuration of the present invention will be described.

(1) The automatic cover 20 is configured to be automatically stopped at both ends of the opening / closing operation by position detecting means (not shown). This is to prevent the object from being bitten beyond the operation range R. For example, when the automatic cover 20 is slid in the closing direction (B direction, B ′ direction) to close the opening 6 when the automatic cover 20 is in the fully opened state, a projection dedicated to closing is provided on the lower surface of the automatic cover 20. Pit P
A limit switch for exclusive use of closing is provided at a portion of the arm disposed therein where the fixed cover 21 is located, and when the automatic cover 20 slides to a preferable position T (see FIG. 6) for closing the opening 6, the protrusion is set to the above position. The automatic cover 20 is configured to stop without sliding any more when it hits a limit switch. Further, by providing the opening-only projection and the opening-only limit switch, the operating range of the automatic cover 20 when the opening 6 is opened can be controlled. That is,
The position detecting means can detect the fully open state or the fully closed state of the automatic cover 20 with respect to the opening 6, and the position detecting means can detect the automatic cover 20.
Can also be detected as being half-open.

(2) The automatic cover 20 is provided with a contact sensor 22 for detecting that an object comes into contact with the tip end 20a. The contact sensor 22 has both a function for confirming safety at work and a function for detecting the presence or absence of an automobile.

First, in order to confirm safety in the operation, the automatic cover 20 is slid in the closing direction (B direction, B 'direction) and hits an obstacle within the operable range R in which the automatic cover 20 can slide. After that, set amount (interval d of about 50 mm)
It is configured to stop only after retreating.

That is, the contact sensor 22 has, for example, a tape shape, and has a plus (+) terminal and a minus (-) terminal on one surface and the other surface, respectively. The contact sensor 22 is electrically connected to the plus (+) terminal and the minus (-) terminal when a pressure is applied to the contact sensor 22 by contact with an object, and a detection signal is output. Then, based on this detection signal, the drive of the electric motor 25 is controlled, and the automatic cover 20 is retracted and stopped. Thereby, safety confirmation can be performed in each operation. In this case, since the automatic cover 20 is slid by driving one pinion 26 with one electric motor 25, there is an advantage that the movement amount of the electric motor 25 can be finely controlled.

For example, as shown in FIG.
When the automatic cover 20 is moved forward while the automatic cover 20 is placed on the roller 3, the drive wheel 11 is located within the operation range R in which the automatic cover 20 can slide.
Stops after retreating after hitting the drive wheel 11,
It is possible to reduce an accident in which the drive wheel 11 is caught in a state where the drive wheel 11 is placed on the roller 3. That is, it is possible to prevent a person from being injured or from being damaged.

Further, since the automatic cover 20 covers a part of the roller 3 during the test, the temperature of the roller 3 can be minimized by the heat rays in the single-shaft chassis dynamometer accommodating room having the solar radiation equipment such as a heat source lamp. Can be suppressed.

A position sensor is used to measure whether the automatic cover 20 has receded by the set amount d.
In this case, the retracted position of the automatic cover 20 can be accurately positioned.

Also, instead of using the position sensor,
The set amount d may be set by a retreat time when the automatic cover 20 retreats. In this case, it is advantageous in that the cost can be reduced because the expensive position sensor is not used.

On the other hand, according to the present invention, the contact sensor 22 is slid once in the closing direction (directions B and B ') to detect the presence or absence of an automobile, so that an automatic driving sequence is performed by a timer as part of the fully automatic driving. Is configured to perform the following operation when the operation starts.

That is, according to the present invention, the automatic cover 20
When the position detecting means detects, for example, a fully open state or a half-open state, that is, when it is confirmed that the automatic cover 20 is in the open state by the position detecting means, the automatic cover 20 is temporarily closed ( B direction, B ′ direction), and the presence / absence of an obstacle can be determined by the contact sensor 22.
Is used to determine whether or not the vehicle 1 is present, and based on the result of the determination, it is possible to obtain information as to whether or not each work is to be performed.

As an example of the start of the automatic operation sequence by the timer as a part of the fully automatic operation, for example, when a test operation is to be performed, first, the [JOG / COVER] key 34 provided on the remote controller 32 is operated. Then, the automatic cover 20 is slid once in the closing direction (B direction, B ′ direction).

Then, (a) When the fully-closed signal of the automatic cover 20 is detected, the vehicle 1 is not present and its drive wheel 11 is not mounted on the peripheral surface of the roller 3.
Thus, it is understood that the situation is not a situation where the work is performed. In this case, the display lamp of the car set is turned on, or a warning sound (buzzer or the like) for urging the car set is issued.

On the other hand, (b) when the automatic cover 20 is not fully closed, a detection signal is output from the contact sensor 22 and the presence of the automobile 1 can be detected. The rear drive wheels 11 can be driven automatically.

Further, as a second example when the automatic operation sequence is started by the timer as a part of the fully automatic operation, for example, even when the idle operation of the roller 3 is desired to be performed, the roller 3 is provided on the remote controller 32 first. [JOG / COV
ER] key 34 to temporarily slide the automatic cover 20 in the closing direction (B direction, B 'direction).

(A) When the fully-closed signal of the automatic cover 20 is detected, since the automobile 1 is not present and its drive wheel 11 is not mounted on the peripheral surface of the roller 3,
Thus, the idle operation of the roller 3 can be automatically performed in a state where the roller 3 is covered with the automatic cover 20.

On the other hand, (b) when the automatic cover 20 is not fully closed, a detection signal is output from the contact sensor 22 to detect that the automobile 1 is present, and that the roller 3 is not idling. Therefore, the idling operation remains stopped. In this case, for example, a vehicle evacuation display lamp is turned on, or a warning sound (buzzer, etc.) for evacuation of the vehicle is made.
Is issued. When the position detecting means confirms that the automatic cover 20 is closed, a display lamp indicating that the automatic cover 20 is closed is turned on, and a warning sound (such as a buzzer) is issued.

In the present invention, each command may be controlled using a personal computer. Further, the personal computer may be switchably connected to the remote control device 32.
This personal computer also has the advantage that the display space for the CRT screen can be reduced.

In the above embodiment, the automatic cover 20
Power source is an electric motor type of electric control,
As a power source of the automatic cover 20, a hydraulic or pneumatic cylinder may be used. Further, instead of driving one pinion 26 by one electric motor 25, for example, a pair of pinions 26, 26 may be driven by the same power source using a torque tube or the like.

Further, the automatic cover 20 may be of a caterpillar type, and the rear end may be suspended in the pit. In this case, the pits can be made smaller than in the above embodiment in which the automatic cover 20 retreats left and right.

When the automatic cover 20 is not used, the automatic cover 20 may be retracted inward, not in the left-right direction or the front-back direction. By doing so, the pit can be made smaller.

Further, the present invention can be applied to a chassis dynamometer having two axes.

[0058]

As described above, according to the present invention, since the roller cover is configured as a slide type automatic cover, the idle operation of the rollers can be performed by an easy operation without having to evacuate the automobile from the test position. . Also, safety in each operation can be ensured.

Further, according to the present invention, a contact sensor for detecting contact of an object with the tip of the automatic cover is provided to detect an open / close state of the automatic cover, and to automatically close the automatic cover when the automatic cover is open. And the contact sensor is used to determine the presence or absence of a vehicle. Therefore, the presence or absence of a vehicle is determined using the contact sensor, and each work is performed based on the determination result. Information can be obtained and can contribute to fully automatic driving without using a dedicated area sensor.
Workability can be improved.

The contact sensor has a function for detecting the presence or absence of an automobile and a function for confirming safety during work. The area sensor can be eliminated, and the cost can be reduced accordingly.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of an overall configuration showing one embodiment of the present invention.

FIG. 2 is a configuration explanatory view showing the embodiment.

FIG. 3 is a plan view showing the embodiment.

FIG. 4 is a perspective view of a main part showing the embodiment.

FIG. 5 is a diagram for explaining an operation during idle operation of the roller in the embodiment.

FIG. 6 is a view for explaining a sliding operation of a roller cover in the embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Car, 2 ... Dynamo main body, 2a ... Spindle, 3 ... Roller, 4 ... Top, 6 ... Opening, 10 ... Centering device, 11 ... Drive wheel, 20 ... Auto cover, 20a ... Auto cover tip, 22 ... contact sensor.

Claims (4)

[Claims] A roller is mounted on a main shaft of a dynamo main body provided with a motor, and a driving wheel of an automobile is mounted on a peripheral surface of the roller through an opening formed in a portion of the floorboard overlapping the roller. In a chassis dynamometer that rotates the roller by driving a drive wheel, a roller cover that covers the roller is provided, the roller cover is configured by a slide-type automatic cover, and an object comes into contact with a tip of the automatic cover. A chassis dynamometer provided with a contact sensor for detecting the following. 2. The chassis dynamometer according to claim 1, wherein the contact sensor has a function of detecting the presence or absence of an automobile. 3. The chassis dynamometer according to claim 1, wherein the contact sensor has both a function for detecting the presence or absence of an automobile and a function for confirming safety during work. 4. A roller is attached to a main shaft of a dynamo main body provided with a motor, and a driving wheel of an automobile is mounted on a peripheral surface of the roller through an opening formed in a portion of the floorboard overlapping the roller. A roller cover that covers the roller while driving the roller by driving a drive wheel, the roller cover is configured by a slide-type automatic cover, and furthermore, it is detected that an object comes into contact with the tip of the automatic cover. A sequence control method in a chassis dynamometer provided with a contact sensor that performs at least a step of detecting an open / closed state of the automatic cover with respect to the opening, and temporarily closing the automatic cover when the automatic cover is in an open state. Sliding in the closing direction and determining whether or not an automobile is present by the contact sensor, automatically at the start of the sequence. A sequence control method in a chassis dynamometer, characterized in that: