JP2869648B1 - Test vehicle with axle load adjustment device - Google Patents

Abstract

To provide a test vehicle with an axle load adjusting device capable of automatically and quickly adjusting an axle load. SOLUTION: The weight includes a test weight 13, a carriage 10 for supporting the weight 13 in a direction orthogonal to a wheel axis on a vehicle, and a driving means for moving the weight 13 and the carriage 10. In a test vehicle equipped with an axle load adjusting device that gives an arbitrary axle load by changing the stop position of the trolley 13, the trolley 10 is detachably engaged with the trolley 10 at an appropriate interval position in the movement area of the trolley 10 on the carrier 2. And a position detection sensor 50 for detecting the position of the cart 10 is provided.
Based on the detection signal of 0, the brake device of the driving means is operated, and the predetermined lock device 40 is operated to stop the weight 13 at the predetermined position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a test vehicle with an axle load adjusting device, and more particularly, to a test vehicle for measuring the load of a vehicle, for example, disposed near a highway gate. The present invention relates to a calibration test vehicle such as a weight meter.

[0002]

2. Description of the Related Art Conventionally, as this type of test vehicle with an axle load adjusting device, the one described in Japanese Utility Model Publication No. 61-22248 developed by the applicant has been known. This real sho 61-2
No. 2248 describes a test weight,
A weight support for movably supporting the weight in a direction perpendicular to the wheel axis on the vehicle, and a driving means for moving the weight and the weight support; and by changing the stop position of the weight, It is configured to give an axle load.

[0003] With this configuration, by moving a weight mounted on a test vehicle, an axle load corresponding to the position can be generated, and the vehicle of the test vehicle is placed on the axleometer to be measured. , An arbitrary load can be applied to the measured axle meter, and the display of the measured axle meter can be calibrated based on the known axle load of the test vehicle.

[0004] In this type of conventional test vehicle with an axle load adjusting device, a manual locking device has been used as a means for stopping the weight support. As shown in FIG. 9, this manual locking device is disposed at a predetermined interval above the moving area of the weight support a, and the lock pin c of each locking device b is spring-loaded by a spring d. The force is urged to protrude downward to engage with the engaging recess e provided on the upper surface of the weight support a.

In this case, the lock device b is provided with a lock pin c.
Is slidably inserted in the vertical direction. A cylinder chamber f is provided between the flange g protruding from the lock pin c and the upper end surface of the cylinder chamber f in the cylinder chamber f. The spring d is contracted so that the lock pin c can always protrude downward. Also, an operating handle g connected to the upper end of the lock pin c, and the operating handle g connected to the upper end of the cylinder chamber f, By engaging with a locking groove i provided in a direction orthogonal to the axial direction, the lock pin c
Is made to stand upward against the elastic force of the spring d. That is, in the lock device b where the weight support a is not stopped, as shown in FIG. 9, the operation handle g is pulled up against the elastic force of the spring d, and then the operation is performed as shown in FIG. The handle g is rotated in the horizontal direction to engage with the locking groove i, and the lock pin c is made to stand by upward. To stop the weight support a, the operation handle g is rotated in the horizontal direction to disengage the operation handle g from the locking groove i, and the lock pin is released by the elastic force of the spring d. c is projected downward.
Then, as shown by the imaginary line in FIG. 9, the inclined guide plate j provided on the upper part of the moving weight support a comes into contact with the lock pin c, and the lock pin c is pushed by the spring d with the inclination. It gradually moves upward against the force and moves to the upper flat surface k of the weight support a. When the weight support a further moves, the lock pin c is fitted into the engagement recess e provided in the upper flat surface k of the weight support a, and the movement of the weight support a is stopped, and the weight support a is stopped. a and the weight can be stopped at a predetermined axial load position. To release the lock of the weight support a, the operating handle g is pulled upward against the resilience of the spring d, and then rotated in the horizontal direction to engage the locking groove i.

[0006]

However, in such a conventional test vehicle with an axle load adjusting device, in order to stop the weight at a predetermined axle load position, the operating handle h of the lock device b must be moved each time. Need to be operated manually.
Therefore, there is a problem that much time and labor is required for adjusting the axle load.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a test vehicle with an axle load adjusting device capable of automatically and quickly adjusting an axle load.

[0008]

In order to achieve the above object, the invention according to claim 1 comprises a weight for testing and a weight for supporting the weight movably in a direction perpendicular to a wheel axis on a vehicle. A test vehicle with an axle load adjusting device, comprising: a support, a driving means for moving the weight and the weight support, and changing the stop position of the weight to provide an arbitrary axle load. At an appropriate interval position in the movement area of the weight support, a lock device that is removably engaged with the weight support is provided, and position detecting means for detecting the position of the weight support is provided, On the basis of the detection signal from the position detecting means, the braking device of the driving means is operated, and the predetermined locking device is operated to stop the weight at the predetermined position. Characterized in that:

In the present invention, the braking device of the driving means may have any structure as long as the power transmission from the driving means to the weight support is stopped based on a detection signal from the position detecting means. For example, the braking device of the driving means includes a disk mounted on a drive shaft, a pair of arms having brakes that can be moved toward and away from the disk, and pressing the brakes against the disk via the two arms. (Claim 2).

In the present invention, the driving means may include:
It is preferable that the power source of the locking device and the braking device is a running engine of the test vehicle (claim 3).

According to the test vehicle with the axle load adjusting device of the present invention configured as described above, the weight support is detachably engaged with the weight support at an appropriate interval position in the movement area of the weight support on the vehicle. A lock device is provided, and a position detecting means for detecting a position of the weight support is provided. Based on a detection signal from the position detecting device, a braking device of the driving device is operated and a predetermined locking device is operated. Let me
Since the weight can be stopped at a predetermined position,
The predetermined axle load can be adjusted automatically.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic side view showing an example of a test vehicle with an axle load adjusting device according to the present invention, and FIG. 2 is a schematic plan view thereof.

The test vehicle with the axle load adjusting device has a pair of mutually parallel rails 11 extending in the front-rear direction on the carrier 2 of the vehicle, that is, the truck 1.
A weight 13 having a predetermined weight is mounted on a weight support having wheels 12 rolling thereon, for example, a truck 10. A drive shaft 16 driven by drive means, for example, a drive motor 15 connected to a PTO of an engine (not shown) of the truck 1 is provided on the front side of the loading platform 2. And a pair of driven sprockets 19 mounted on a driven shaft 18 provided at the rear end of the loading platform 2, respectively, and an endless transmission chain 20 is stretched over the pair of driving sprockets 17 mounted on the driven shaft 17. A part of the cart 10 is fixed to these transmission chains 20. That is, as shown in FIG. 3, the carriage 10 and the transmission chain 20 are connected via a bracket 21 projecting from the lower surface of the carriage 10.
And are connected. Therefore, the carriage 10 and the weight 13 can be moved in the front-rear direction of the carrier 2 by the drive of the drive motor 15 via the transmission chain 20. The truck 10 is fixed to the front side of the loading platform 2 by a connecting wire 3 having a turn buckle to prevent accidental movement when the truck 1 runs or when an axle load test is not performed.

As shown in FIG. 8, the drive motor 15 is connected to an oil tank 28 through a hydraulic pipe 26, and drives a hydraulic pump 27 provided in the hydraulic pipe 26 by the PTO of the engine. , Hydraulic piping 26
The drive motor 15 is driven by switching operation of an electromagnetic switching valve 29 provided therebetween.
A relief valve 30 with an electromagnetic valve is interposed in the hydraulic pipe 26 of the drive motor 15, and the relief valve 30 with an electromagnetic valve is provided.
By returning a part of the oil flowing in the hydraulic pipe 26 to the oil tank 28 by the excitation operation of the
5 can be reduced. The hydraulic pressure supplied by the hydraulic pump 27 is also supplied to an outrigger (not shown) via another hydraulic pipe 26A and an electromagnetic switching valve 29A provided on the hydraulic pipe 26A. The pressure switch 31 is connected to the pressure switch 26 via a branch pipe 32 to detect the situation where the outrigger is installed on the ground. The outriggers are provided to prevent the springs and the like from being stressed by the weights 13. That is, since the truck 1 (test vehicle) is always loaded with the weight 13, when not in use, the vehicle body is lifted by the outrigger jack to protect the spring and the like.

A plurality of guide sprockets 22 (eight in the drawing) for preventing the transmission chain 20 from loosening are provided at an intermediate portion of the transmission chain 20 which is bridged between the driving sprocket 17 and the driven sprocket 19. Is shown). In this case, as shown in FIG. 3, the guide sprockets 22 are arranged at upper and lower positions facing each other on the inner side of the endless transmission chain 20, and are mounted on a rotating shaft 23 on which each guide sprocket 22 is mounted. A guide member 25 is interposed between the guide rollers 24 so that a constant tension is always applied to the transmission chain 20.

A plurality of lock devices 40 (in the drawing, nine lock devices 40) are provided at appropriate intervals below the moving area of the carriage 10 between the two guide rails 11 of the carrier 2.
Are arranged. As shown in FIG. 3, the lock device 40 includes an air cylinder 41 arranged in a vertical state,
A lock pin 43 connected to a piston 42 that slides in the air cylinder 41 and protrudes upward, and an engagement hole 4 provided on the lower surface of the carriage 10 for inserting the lock pin 43 therein.
4 and an engagement sleeve 45 having the same.

In this case, the lock device 40 is arranged in order from the front side to the rear side of the carrier 2 such as 8 tons, 9 tons, 10 tons, and 11 tons.
n), 12 tons, 13 tons, 14
Ton, 15 ton and 16 ton (t
on), of which 8 tons (t
on), 10 tons, 12 tons and 1
4 places of 6 tons (tons), the lock device 40 of the carrier 2
It is configured to be able to operate based on a detection signal from a position detecting means, for example, a position detecting sensor 50, which includes a light emitting element 51 disposed in the vicinity and a light receiving element 52 disposed on the lower surface of the carriage 10. That is, 8 tons, 1
0 tons, 12 tons and 16 tons (t
on) The air cylinders 41 of the four lock devices 40
As shown in FIG. 6, a primary port 41a that projects (extends) the lock pin 43 and a secondary port 41b that lowers (contracts) the lock pin 43 are provided. The three-port three-position switching solenoid valves 47a and 47b are respectively connected to the first air pipe 46a and the second air pipe 46b connected to the secondary port 41b.
(Hereinafter referred to as an electromagnetic switching valve) through the air tank 48
It is connected to the. The air tank 48 is supplied with air from a vehicle brake air tank 48b in which air compressed by an air compressor 48a incorporated in the engine is stored (see FIG. 6). In FIG. 6, reference numeral 48c denotes an air governor.

Further, the first and second air pipes 47 are provided.
a and 47b are also connected to a primary port 61a and a secondary port 61b of a brake chamber 61 constituting a braking device 60 (hereinafter referred to as a braking device) of the driving means. 6
One operating rod 62 can be expanded and contracted (see FIG. 6). As shown in FIGS. 4 and 5, the brake device 60 includes a disk 64 mounted on a drive shaft 16 connected to the drive motor 15 via a coupling 63, and a brake capable of coming and going with respect to the disk 64. It has a pair of arms 66a and 66b having a child 65, and a brake chamber 61 as a pressing means for pressing the brake 65 against the disk 64 via both arms 66a and 66b. In this case, the arms 66a and 66b are connected to the support member 67 by the pivot 68.
The brake element 65 on the distal end is rotatably pivoted so as to move toward and away from the disk 64, and a tension spring 69 is connected to the base end side. The braking element 65 is always positioned away from the disk 64. A brake chamber 61 is connected to the base end of one arm 66a, and an operation rod 62 of the brake chamber 61 penetrates one arm 66a and abuts on a side surface of the other arm 66b. . Accordingly, the supply and exhaust of air to and from the brake chamber 61 causes the operation rod 62 to extend and press the other arm 66b against the resilience of the tension spring 69, so that the base ends of both arms 66a and 66b are provided. At the same time as the sides are relatively separated, the brake element 65 is pressed against the disk 64 and the rotation of the drive shaft 16 is stopped, that is, the movement of the carriage 10 and the weight 13 is stopped.

On the other hand, as shown in FIG. 7, the position detecting sensor 50 includes a main sensor 50A and an auxiliary sensor 50B. When the main sensor 50A is operated to close the electric contact, the relay Ra is operated. , Close the relay contact Sa,
The solenoid of the electromagnetic switching valve 29 of the drive motor 15 is excited, and the solenoids of the electromagnetic switching valves 47a and 47b of the lock device 40 and the brake device 60 are excited to lock the lock pin 43 of the air cylinder 41 with which the position detection sensor 50 is close. By extending, the movement of the carriage 10 can be stopped. The auxiliary sensor 50B is a main sensor 50B.
When the auxiliary sensor 50B is operated to close the electric contact, the auxiliary relay Rb is operated, the auxiliary relay contact Sb is closed, and the solenoid-operated relief valve 30 is operated. When the solenoid is excited, the relief valve 30 with the electromagnetic valve is operated to return a part of the oil supplied to the drive motor 15 to the oil tank 28 and reduce the rotation speed of the drive motor 15.

At a position where the weight 13 is not automatically stopped, for example, at a position of 9 tons, the bogie 10 is similarly decelerated by manual operation and then stopped, and the bogie 10 and the weight 13 are stopped by the locking device 40 at a predetermined position. It can be stopped at a position. Also,
The position controller of the weight 13 is provided in the cab 4 of the truck 1, and the weight 13 can be stopped at a predetermined position by operating from the cab 4,
The operation of the relays Ra and Rb can be confirmed by the lamp T.

As described above, when the position detection sensor 50 is constituted by the main sensor 50A and the auxiliary sensor 50B, when the weight 13 is stopped at the predetermined axle load setting position, first, the electromagnetic wave is detected by the detection signal of the auxiliary sensor 50B. By actuating the relief valve 30 with a valve, the rotation of the drive motor 15 is decelerated, and the movement of the carriage 10 is decelerated. Thereafter, the brake device 60 is operated by the detection signal of the main sensor 50A, and the operation of the drive motor 15 is controlled. While the rotation is stopped, the bogie 10 and the weight 13 can be stopped at the predetermined axle load adjustment position by operating the lock device 40.

Next, the operation of the test vehicle with the axle load adjusting device configured as described above will be described. First, the PTO is turned on in the driver's cab 4, and the connecting wire 3 of the truck 10 fixed at a position in front of the loading platform 2 is released to make the truck 10 movable. Next, a predetermined axle load test position, for example, 10
Set the ton position and press the start switch. Then, the lock pin 43 of the lock device 40 is automatically
Is activated to release the locked state, and the drive motor 15 operates to start the movement of the carriage 10. When the carriage 10 is located immediately before the predetermined position, the auxiliary sensor 50B of the position detection sensor 50 operates to decelerate the movement of the carriage 10, and thereafter the main sensor 50A operates and the brake device is operated based on the detection signal from the main sensor 50A. 60 operates and the trolley 10
Stops moving. Simultaneously with the stop of the cart 10, the lock device 40 operates to lock the lock pin 43 with the engaging hole 4 of the cart 10.
4, the carriage 10 and the weight 13 are stopped at a predetermined axle load test position.

Therefore, based on the weight 13 fixed at a predetermined axle load test position, an axle load corresponding to the position can be generated. That is, as shown in FIG. 1, the horizontal distance from the intermediate position between the shafts of the wheels 5 and 6 in front of the truck 1 (test vehicle) to the position of the center of gravity of the weight 13 is X.
When the weight of the weight 13 is Wo (Kg) and the weight of the wheel base is L, the load W caused by the weight 13 on the axle of the rear wheel 7 can be obtained as follows.

W = Wo × (X / L) (1) Therefore, the load W can be changed by changing the position of the weight 13 based on the above equation (1).
A desired axle load can be generated. The weight of the weight 13 can be increased or decreased according to the purpose.

Therefore, by merely placing the wheel behind the truck 1 (test vehicle) on the axleometer to be measured, an arbitrary load can be applied to the axleometer to be measured, and the known load of the test vehicle is known. The display of the measured axleometer can be calibrated based on the axle load.

After performing the axle weight test as described above,
After the lock state of the lock pin 43 of the lock device 40 is released, the carriage 10 is moved to the front side of the carrier 2 and stopped, and then the movement of the carriage 10 is fixed by the connecting wire 3.

In the above embodiment, the locking device 40
Has been described with the air cylinder 41, but the lock device 40 is not necessarily
The air cylinder 41 may be replaced with an air chamber or another air actuator. In the above embodiment, the brake device 60
Has been described with the brake chamber 61, but an air cylinder or another air actuator may be used instead of the chamber.

[0028]

As described above, according to the test vehicle with the axle load adjusting device of the present invention, the weight support can be disengageably engaged with the weight support at an appropriate position in the movement area of the weight support on the vehicle. In addition to providing a locking device that matches the position of the weight support, a position detecting device that detects the position of the weight support is provided, and a braking device of the driving device is operated based on a detection signal from the position detecting device. Can be operated to stop the weight at a predetermined position, so that a predetermined axle load can be automatically adjusted.

[Brief description of the drawings]

FIG. 1 is a schematic side view showing an example of a test vehicle with an axle load adjusting device of the present invention.

FIG. 2 is a schematic plan view of the test vehicle with the axle load adjusting device.

FIG. 3 is a cross-sectional view showing a lock device according to the present invention.

FIG. 4 is a partial cross-sectional side view showing a part of a driving means and a braking device in the present invention.

FIG. 5 is a side view showing a braking device according to the present invention.

FIG. 6 is an air piping diagram of the lock device and the braking device.

FIG. 7 is an electric circuit diagram of the position detecting means and the lock device according to the present invention.

FIG. 8 is a hydraulic piping diagram of a drive motor of the drive means.

FIG. 9 is a schematic sectional view showing a lock device of a conventional test vehicle with an axle load adjusting device.

[Explanation of symbols]

 Reference Signs List 1 truck (test vehicle) 10 trolley (weight support) 13 weight 15 drive motor (drive means) 16 drive shaft 17 drive sprocket 19 driven sprocket 20 transmission chain 29 solenoid switching valve 30 relief valve with solenoid valve 40 locking device 41 air cylinder 43 Lock Pin 44 Engagement Hole 47a, 47b Solenoid Switching Valve 50 Position Detection Sensor 50A Main Sensor 50B Auxiliary Sensor 60 Brake Device (Brake Device) 61 Brake Chamber (Pressing Means) 62 Operating Rod 64 Disk 65 Braking Element

Claims (3)

(57) [Claims] 1. A weight for a test, a weight support for movably supporting the weight in a direction orthogonal to a wheel axis on a vehicle, and driving means for moving the weight and the weight support, In a test vehicle with an axle load adjusting device that gives an arbitrary axle load by changing the stop position of the weight, the weight support is disengaged from the weight support at an appropriate interval position in a moving area of the weight support on the vehicle. A lock device that engages as much as possible is provided, and a position detecting device that detects the position of the weight support is provided. Based on a detection signal from the position detecting device, a braking device of the driving device is operated. A test vehicle with an axle load adjusting device, wherein the lock device is actuated to stop the weight at a predetermined position. 2. The test vehicle with an axle load adjusting device according to claim 1, wherein the braking device of the driving means has a pair of a disk mounted on the driving shaft and a brake element which can be moved toward and away from the disk. A test vehicle equipped with an axle load adjusting device, comprising: an arm; and a pressing means for pressing the brake element against the disk via the two arms. 3. The test vehicle with an axle load adjusting device according to claim 1, wherein the power source of the driving means, the lock device, and the braking device is a running engine of the test vehicle. Test vehicle with adjustment device.