JPH08207647A - Traveling equipment for heavy goods vehicles - Google Patents

Abstract

PURPOSE: To quickly detect the puncture of a tire of a heavy object carrying device. CONSTITUTION: An axle box 8 provided with wheels 9 in which pneumatic tires 11 are respectively provided on both ends of an axle 8a is rockably supported on a spindle 7 perpendicular to the axle 8a. The tilting movement of the axle 8a is detected by a sensor 14 constituted of an operating element 16 provided on the spindle 7 and a proximity switch 15 provided on the axle box side 8 when one of the pneumatic tires 11 is punctured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a traveling device for a heavy goods vehicle suitable for carrying heavy goods such as heavy machinery, and more particularly, to a compound wheel type traveling machine having pneumatic tires on both sides of an axle box. The present invention relates to a traveling device for a heavy load vehicle capable of quickly detecting a flat tire of a pneumatic tire in the device.

[0002]

2. Description of the Related Art Conventionally, some new traffic vehicles traveling on tracks, passenger cars, trucks and the like are provided with a puncture detection device for detecting a puncture of a pneumatic tire by a change in air pressure or a change in ground pressure. Like a trailer or carrier for carrying heavy objects, a compound wheel type traveling device is installed at the bottom of a long vehicle body.
That is, a heavy-weight carrier including a plurality of compound-wheel type traveling devices in which an axle box having wheels with pneumatic tires at both ends of an axle is pivotally supported by a swing arm pivotally in a direction orthogonal to the axle. There were no effective puncture detection devices in vehicles due to the large number of pneumatic tires, etc., so they relied on visual inspection at the start of operation and air pressure inspection with an air gauge.

[0003]

Therefore, in a heavy-duty transportation vehicle, a tire flat tire during driving must be sensed by the driver's feeling, and it is not possible to quickly find a flat tire. It was difficult. Also, if the discovery of a flat tire is delayed, and you continue to drive,
A large load is applied to other pneumatic tires, and there is a risk that the pneumatic tires will puncture one after another. In this case, there is a risk of secondary damage to traveling devices such as wheels and axles.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a traveling device for a heavy load vehicle capable of promptly detecting a puncture of a pneumatic tire and traveling safely.

[0005]

In order to achieve the above object, the present invention is, in a first aspect of the present invention, an axle box of a multi-wheel type traveling device having pneumatic tires at both ends of an axle, which is orthogonal to the axle. In a traveling device of a heavy goods transporting vehicle swingably supported by a support shaft of a swing arm provided in a direction, the axle when one of the pneumatic tires is punctured between the axle box and the swing arm. It is characterized by the provision of a sensor that detects tilting of the.

Further, in the second invention, the sensor is
A proximity switch provided on either one of the swing arm support shaft or the axle box, and an operation provided on the other one of the axle box or the swing arm support shaft that operates the proximity switch by tilting the axle. In the third invention, the sensor is a magnetic proximity switch provided on either one of the swing arm or the axle box, and the magnetic proximity switch is actuated by tilting the axle. It is characterized in that it is a magnet provided on the other side of the axle box or the swing arm.

[0007]

As a result, when one of the double-wheeled pneumatic tires is punctured, the axle box holding the axle is inclined, so that displacement occurs between the inclined axle box and the non-inclined support shaft or swing arm. Is detected by a sensor disposed between the two, and it can be notified that the pneumatic tire has punctured.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

1 to 8 show a first embodiment of the present invention. As shown in FIG. 8, a heavy goods transport vehicle 1 includes a driver's cab 2 at the bottom of the vehicle body and both sides of the vehicle body. There are 16 sets of traveling devices 3 in each of 8 sets, and the running and steering can be performed by interlocking each traveling device 3 with a computer.

The traveling device 3 includes a suspension bracket 4 which is provided on the lower part of the vehicle body so as to be rotatable, a swing arm 6 which is pivotally attached to an arm 5 of the suspension bracket 4 so as to be vertically swingable, and a swing arm 6. A shaft 7 projecting from the tip of the shaft, a shaft box 8 swingably supported by the shaft 7, and wheels 9, 9 rotatably supported at both ends of an axle 8a in the shaft box 8, respectively. , A hydraulic cylinder 10 that supports the swing arm 6, and wheels 9, 9 are provided with pneumatic tires 11, respectively.

The swing arm 6 has a rod 10a of a hydraulic cylinder 10 attached to the center thereof.
The height of the vehicle body is changed by the expansion and contraction of a, and the hydraulic cylinder 10 absorbs the vertical swing of the swing arm 6 due to the unevenness of the traveling path. Further, the support shaft 7 at the tip of the swing arm 6 is provided so as to project substantially horizontally in the vehicle body front-rear direction orthogonal to the axle 8a, and the shaft box 8 is swingably supported on the support shaft 7. .

The axle box 8 has a support shaft attachment portion 8b and a motor attachment arm 8c, and a hydraulic motor 12 for driving wheels 9, 9 is attached to the motor attachment arm 8c. The support shaft mounting arm 8b is formed in a cylindrical shape, and the support shaft 7 is inserted into the hollow portion of the support shaft 8 so that the shaft box 8 is supported so that both ends of the axle 8a swing vertically with respect to the support shaft 7. The shaft box 8 is supported by the shaft 7, and the shaft box 8 tilts with respect to the unevenness of the traveling road surface and the drainage gradient so that both the pneumatic tires 11 and 11 are always grounded.

The support shaft 7 is formed in such a length that its tip projects outward from the support shaft mounting portion 8b.
A cover body 13 is attached to the cover body 13 to cover the protruding portion of the support shaft 7.

A sensor 14 for detecting a flat tire is provided between the cover body 13 and the tip of the support shaft 7. The sensor 14 includes a proximity switch 15 fixed to the cover body 13 and an operator 16 fixed to the tip of the support shaft 7 protruding outward from the support shaft mounting portion 8b.

Further, a low link stopper 17 is formed between the flange portion 6a provided at the tip of the swing arm 6 and the axle box 8, and the tilting of the axle box 8 is restricted by the low link stopper 17. It The rolling stopper 17 is formed by an opening 17a having a rectangular cross section formed in the flange 6a and a projection 17b provided in the shaft box 8 and inserted into the opening 17a.
Has a trapezoidal cross section with a lower portion wider than the upper portion.
As a result, the protrusion 17a tilts due to the tilting of the axle box 8 and abuts against the inner wall of the opening 17a, so that the axle box 8 is prevented from tilting a predetermined amount (more than 7 degrees in this embodiment).

The actuator 16 has a groove 16a formed in the center of the upper portion thereof, and the proximity switch 15 is arranged on the upper portion of the actuator 16 and, as shown in FIGS. In the normal state of the pneumatic tires 11, 11, that is, in the state where the axle 8a is horizontal, the proximity switch 15 is located directly above the groove 16a of the actuator 16, and the proximity switch 15 does not operate.

Then, as shown in FIGS. 5 and 6,
When one of the pneumatic tires 11 is flat, the axle 8a
Along with the tilting of the axle box 8 toward the flat pneumatic tire 11 side, the proximity switch 15 also moves to the flat pneumatic tire 11 side and rotates from directly above the groove portion 16a of the operator 16 to move the proximity switch 15 Works.

When the axle box 8 tilts together with the axle 8a due to the unevenness of the road surface or the water gradient, the proximity switch 15 also moves together with the axle box 8 and rotates from directly above the groove 16a of the actuator 16, Since the running road surface has a drainage gradient of about 3 degrees, the groove 16a of the operator 16 is formed so that the proximity switch 15 does not operate when the axle box 8 tilts in this range. The dead zone angle at which the proximity switch 15 does not operate can be arbitrarily set by changing the width of the groove 16a of the actuator 16. Further, the groove 16a of the actuator 16 is formed in a projecting shape so that an alarm is automatically issued even when a defect other than a flat tire such as a malfunction or disconnection of the sensor 14 occurs in the detection device, and the proximity switch 15 is always provided. O
It may be set to N so that the alarm is issued when the proximity switch 15 is OFF.

A signal generated by the operation of the proximity switch 15 is transmitted to the operator by a display lamp or an alarm buzzer through processing of a control sequencer (not shown). In this control system A, since the axle box 8 tilts even when the pneumatic tire 11 is punctured, for example, due to unevenness or inclination of the road, obstacles, etc., the signal from the operation of the sensor 14 depends on the condition of the road. It is structured such that it is determined whether it is due to a flat tire or a flat tire, and only the information determined to be flat is notified to the operator.

That is, as shown in FIG. 7, the control system A does not determine the puncture even if the axle box 8 is tilted and the proximity switch 15 is operated, unless the vehicle is in the loading state or the traveling state. , Whether it is loaded or running,
Do not judge that a tire is tilted for a short time, such as when the tire passes through a recess on the road, and judge that it is a flat tire after the tilt of the axle box 8 continues for 5 seconds or more, and blink the indicator lamp. Notify the punk. Furthermore, if the operator continues to run without noticing the blinking of the puncture indicator lamp, 10 seconds after the proximity switch 15 is activated, an alarm buzzer for notifying the puncture detection is sounded. The inclination angle of the axle box for detecting a puncture, the time from the activation of the sensor 14 to the lighting of the display lamp and the time to sound the alarm buzzer are the traveling speed of the vehicle, the condition of the road on which the vehicle travels, Can be set as appropriate.

The control system A may be provided in each of the traveling devices 3, or 16 sets of the traveling devices 3 may be divided into, for example, 4 groups, and one may be provided in each group. Further, if it is only necessary to immediately detect that the tire 11 of the traveling device 3 has punctured and quickly stop the heavy goods transport vehicle 1, only one control system A for all traveling devices 3 is required. It may be provided.

By forming the tire as described above, when one of the pneumatic tires 11 is punctured, the proximity switch 15 is actuated to promptly notify the operator of the puncture, so that tire replacement work can be immediately started. It is possible to safely transport heavy objects. Further, the control system A turns on the lamp only when the pneumatic tire 11 is punctured, and when the axle box 8 is tilted for a short time for a reason other than the puncture, the lamp does not turn on. The operator can be notified efficiently.

Even if the operator does not notice the lighting of the lamp, a few seconds after the lamp is lit, the control system A
Since the buzzer sounds due to this, the operator does not notice the puncture and there is no risk of continuing traveling.

In the above embodiment, the proximity switch 15 is provided on the side of the axle box 8 and the actuator 16 is provided on the support shaft 7, but the arrangement may be reversed, and the sensor of the present invention is
It is not limited to the combination of the proximity switch and the actuator as in the above-described embodiment, but a limit switch can be used.

FIGS. 9 and 10 show a second embodiment of the present invention in which the sensor 20 is provided at the portion of the rolling stopper 17, and the sensor 20 is arranged above the opening 17a on the swing arm 6 side. Magnetic proximity switch 2 installed
1 and the magnets 22 and 22 attached to the tip of the protrusion 17b that tilts integrally with the axle box 8.
The magnets 22 and 22 are arranged at positions overlapping with each other in the front-rear direction through a bracket attached to the tip of the protrusion 17b, and the left and right positions can be adjusted by the long holes.

When the pneumatic tires 11, 11 of the wheels 9, 9 are normal and the axle box 8 is horizontal, the magnetic proximity switch 21 is arranged on the center of the magnets 22, 22. The magnets 22 and 22 are arranged so that the tilt detection range of the axle box 8 can be set, and the magnets 22 and 22 are wrapped back and forth so that the positions thereof can be adjusted slightly to the left and right by elongated holes.
The flatness of 1 adjusts so that the protrusion 17b can be detected when the protrusion 17b is inclined by about 4 degrees or more.

By forming as described above, when one pneumatic tire 11 of the traveling device 3 is punctured,
As the axle box 8 largely tilts toward the flat pneumatic tire 11 side, the magnets 22 and 22 also rotate at the same time and move out of the detection range of the magnetic proximity switch 21.

As a result, the magnetic proximity switch 21 is activated, and the operator can be notified of the puncture through the control system A, as in the first embodiment. Further, since the sensor 20 is set to detect a puncture when the protrusion 17b inclines ± 4 degrees, the sensor 20 has a standard road inclination surface with a 3 degree drainage gradient, and also has some uneven terrain. Even if there is, the puncture detector does not malfunction.

As described above, the sensor is not limited to the one provided outside the rolling stopper, but may be provided inside the rolling stopper, and the detector may be a proximity switch. When the sensor is provided inside the rolling stopper, rainwater, dust, mud, etc. can be prevented from adhering, and the accuracy of the sensor can be secured.

[0030]

As described above, the traveling apparatus for a heavy load vehicle according to the present invention is a swing in which an axle box of a compound wheel type traveling apparatus having pneumatic tires at both ends of an axle is provided in a direction orthogonal to the axle. It is pivotally supported by the support shaft of the arm, and a sensor for detecting the tilting of the axle when one of the pneumatic tires is punctured is provided between the axle box and the swing arm. Puncture of the pneumatic tire can be quickly detected by the tilting of the axle due to puncture, so in the event of a puncture, you can safely stop the heavy load vehicle and immediately start tire replacement work, and continuously puncture other pneumatic tires. It is possible to prevent secondary damage to traveling devices such as wheels and axles.

[Brief description of drawings]

FIG. 1 is a cross-sectional side view of essential parts of a traveling device for a heavy goods transportation vehicle showing a first embodiment of the present invention.

FIG. 2 is a side view of the traveling device of the heavy goods transportation vehicle showing the first embodiment of the present invention.

FIG. 3 is a view taken along the line III-III in FIG.

FIG. 4 is an explanatory view of a main part of a sensor which is traveling in a normal state.

FIG. 5 is a partial cross-sectional front view showing the traveling device of the heavy goods transportation vehicle when the pneumatic tire is flat.

FIG. 6 is an explanatory view of a main part of the sensor when a flat pressure is applied.

FIG. 7 is an explanatory diagram of a control system.

FIG. 8 is a side view showing a vehicle body of a heavy goods transportation vehicle.

FIG. 9 is a cross-sectional view of essential parts showing a second embodiment of the present invention.

FIG. 10 is a front view showing a second embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Heavy goods transportation vehicle, 2 ... Driver's cab, 3 ... Traveling device, 6 ...
Swing arm, 7 ... Support shaft, 8 ... Axle box, 8a ... Axle, 9
... wheels, 11 ... pneumatic tires, 12 ... hydraulic motors, 14,
20 ... Sensor, 15 ... Proximity switch, 16, 22 ... Actuator, 17 ... Low link stopper, 21 ... Detector, A ...
Control system

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yasutoshi Kiyota 2-6-3 Otemachi, Chiyoda-ku, Tokyo Within Nippon Steel Corporation (72) Inventor Harumi Nakayama 376-2 Takyu, Munakata City, Fukuoka Prefecture ( 72) Inventor Sei Kaneko 5-1-1-13, Totani, Naka-city, Fukuoka Prefecture (72) Inventor, Kazuhiko Kitazawa 1-1, Sanbonmatsucho, Atsuta-ku, Nagoya-shi, Aichi Japan Vehicle Manufacturing Co., Ltd.

Claims (3)

[Claims] 1. A heavy load carrying vehicle in which an axle box of a compound wheel type traveling device having pneumatic tires at both ends of an axle is swingably supported by a swing arm provided in a direction orthogonal to the axle. The traveling device of the heavy goods transporting vehicle according to claim 1, wherein a sensor for detecting tilting of the axle when one of the pneumatic tires is flat is provided between the axle box and the swing arm. . 2. The sensor includes a proximity switch provided on either one of a swing shaft of the swing arm and the axle box, and a support of the axle box or the swing arm that operates the proximity switch by tilting the axle. The traveling device for a heavy goods transport vehicle according to claim 1, wherein the traveling device is an actuator provided on either of the shafts. 3. The sensor is a magnetic proximity switch provided on either one of the swing arm or the axle box, and either the axle box or the swing arm that operates the magnetic proximity switch by tilting the axle. 2. A magnet provided on the other side, wherein:
A traveling device for the heavy-duty transportation vehicle described.