JPH07309264A - Crawler belt type fire engine - Google Patents

Abstract

PURPOSE:To secure stable travelling mainly on a bad road by arranging front wheels having tires and swing beams on the front and rear bottoms of a car body and also winding flexible crawler belts around idling wheels and driving wheels having tires and provided on the front and rear of the swing beams. CONSTITUTION:A crawler belt type fire engine 1 is provided with a cabin 3 and a fire extinguishing facility 10 respectively above the front and rear of a car body 2. Also, front wheels 5 and swing beams 31 are provided respectively below the front and rear of the car body 2 and also idling wheels (intermediate wheels) 6 and driving wheels 7 are provided respectively in front and rear of the swing beams 31. Further, crawler belts 8 having flexibility are wound on the idling and driving wheels 6 and 7. Rubber pneumatic tires made of rubber are attached to the wheels 5 to 7. Meanwhile, the fire extinguishing facility 10 is provided with a water absorbing hose 12, a water discharging hose 13, a ladder 14, a fire extinguisher 15 and a crew seat 16 in its housing 11 for housing a fire extinguishing pump, etc. Thus, stable travelling on a bad road and high-speed travelling on a paved road can be secured respectively.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to improvements in fire engines.

[0002]

2. Description of the Related Art FIG. 4 is a side view of a conventional fire engine. Generally, a fire engine 100 has a cabin 101 mounted on the front side of the upper body, a fire equipment 102 mounted on the rear side of the upper body, and a lower body of the vehicle. A front wheel 103 with a tire and a rear wheel 104 with a tire attached to the front and rear of the vehicle.

[0003]

The above-described conventional fire engine 100 runs well on paved roads and flat terrain, but cannot be said to be good on snowy roads, icy roads, muddy grounds, and the like. If the fire area is in the mountains, marshes, etc., the fire engine 100 cannot easily reach the site, and the time required to arrive is long.

[0004]

In order to solve the above problems, the present invention provides a cabin mounted on the front side of the upper part of the vehicle body,
Fire-fighting equipment mounted on the rear side of the upper part of the vehicle body, front wheels with tires mounted on the front side of the lower part of the vehicle body, swing beams mounted on the rear side of the lower part of the vehicle body with the middle part in the longitudinal direction as the swing center, and before and after the swing beam. A crawler belt type fire engine is constituted by a tire-equipped idle wheel and a tire-equipped drive wheel rotatably attached to the tire, and a crawler belt made of a flexible material attached to the idle wheel and the drive wheel.

Further, the distance from the swing center of the swing beam to the rotation center of the idle wheel is set longer than the distance from the swing center to the rotation center of the drive wheel.

It is preferable to dispose the center of gravity of the fire fighting equipment and the center of gravity of the engine near the swing center of the swing beam.

Further, it is preferable to have a passenger seat in the front part of the fire fighting equipment and to have a passage between the front part of the fire fighting equipment and the rear part of the cabin.

[0008]

The rear wheel side is used as a crawler belt to improve the running performance on bad roads such as snowy roads, icy roads and muddy grounds.

Since the distance from the center of rotation of the front wheels to the center of swing of the swing beam is long, steering stability is high when traveling straight ahead at high speed. In addition, the load acting on the swing beam swing center is larger on the drive wheel side than on the idle wheel side, so when driving a crawler belt type vehicle on soft ground such as muddy ground or snowy road. The crawler belt overcomes the soft ground on the side of the idle wheel, which has a relatively small load, and steps on the soft ground on the side of the drive wheel, which has a large load, to increase the propulsion force.

Since the center of gravity of the fire equipment and the center of gravity of the engine, which are heavy objects, are arranged near the center of swing of the swing beam, the distance from the center of swing to the center of rotation of the idler wheels and the center of swing. According to the ratio of the distance from the center of rotation to the center of rotation of the drive wheel, the load acting on the center of swing acts in a well-balanced manner on the idle wheel side and the drive wheel side.

Since the occupant's seat is provided in the front part of the fire-fighting equipment, the personnel necessary for fire-fighting activities can be carried. Furthermore, since there is a passage between the front part of the fire fighting equipment and the rear part of the cabin, it is possible to go to the opposite side without going around the front and rear of the fire engine.

[0012]

Embodiments of the present invention will be described below with reference to the accompanying drawings. In addition, "front", "rear", "left", and "right" follow the direction viewed from the driver, and the drawings are viewed in the direction of the reference numerals. FIG. 1 is a side view of a crawler belt type fire engine according to the present invention. The crawler belt fire engine 1
For example, a cabin 3 attached to the upper front side of the vehicle body 2,
Fire extinguishing equipment 10 mounted on the upper rear side of the vehicle body 2 and the vehicle body 2
A front wheel 5 attached to the front side of the lower portion, a swing beam 31 attached to the rear side of the lower portion of the vehicle body 2 (constituting a rear suspension 30 to be described later), and freewheels attached to the front and the rear of the swing beam 31 (intermediately). It is a light truck type rear wheel drive / crawler type six-wheel vehicle composed of wheels 6 and drive wheels (rear wheels) 7. Each wheel 5, 6, 7 is equipped with a rubber pneumatic tire. The idle wheel 6 and the drive wheel 7 are
A crawler belt 8 having flexibility is hung, and the crawler belt 8 is made of a flexible material such as a rubber material.
A plurality of notches (not shown) are integrally formed on the ground surface side of the crawler belt 8. Therefore, when the convex portion comes into contact with the road surface, the convex portion is flexibly deformed at the cut portion to increase the grip.

The fire extinguishing equipment 10 is a fire pump (not shown).
And the like, a water-absorbing hose 12, a discharge hose 13, a ladder 14, a digester 15, a passenger seat 16 arranged in the front part of the housing 11, and the like. Firefighters who can't ride in Cabin 3
Take a seat 16. Front of fire-fighting equipment 10 and cabin 3
Between the rear part and the aisle 1 that runs between the left and right sides of the fire engine 1.
7 is provided. For this reason, firefighters are
It is possible to pass through the passage 17 to go to the opposite side, and there is no need to go around the front and rear of the fire engine 1. In addition, 18 is a fall prevention belt.

FIG. 2 is a plan view of a crawler belt type fire engine according to the present invention, in which a seat 1 is provided at a front portion of a housing 11.
6 is provided, and a passage 17 is provided on the front side of the seat 16. Incidentally, 19 is a seat belt for the seat 16.

FIG. 3 is a side view showing the drive device and suspension of the crawler belt type fire engine according to the present invention. The vehicle body 2 includes a front suspension 21, a rear suspension 30, a steering device 50 and the like. Front wheel 5
Are independently suspended from the vehicle body 2 by the front suspension 21. That is, under the cabin 3 (front part of the vehicle body 2)
Suspension components such as an oil damper (shock absorber) 22 are installed in the.

A steering device 50 is attached to the front of the vehicle body 2,
The steering device 50 includes a steering shaft 51, a gear box 52, a steering arm 53 and a tie rod 5.
This tie rod 54 is connected to a knuckle 55 that supports the front wheel 5. Then, the steering force from the steering wheel 56 in the cabin 3 is transmitted to the pair of left and right front wheels 5, 5 by the steering device 50.

An engine 61 with a transmission is mounted on the rear side of the lower portion of the vehicle body 2, and the output side of the engine 61 is connected to an axle 7a of a drive wheel 7 via a rear wheel drive device (not shown). The front wheel drive device 6 is provided under the cabin 3 at the front of the vehicle body 2.
3 is mounted, and the front wheel drive device 63 is an engine 61
It consists of a propulsion shaft 64 extending forward, a differential device 65, and a front wheel drive shaft (not shown), and this front wheel drive shaft is connected to the axle 5a of the front wheel 5.

On the other hand, the rear suspension 30 has a swing beam 31 whose center in the longitudinal direction is a swing center O,
The leaf spring mechanism 33 includes a front suspension 41 and a rear suspension 45 that suspend the front and rear of the swing beam 31 from the vehicle body 2 independently.

The leaf spring mechanism 33 includes a spring bracket 34 and a shackle bracket 35 mounted on the rear side of the lower portion of the vehicle body 2, and these brackets 34, 3.
5, the leaf spring 36, and the pivot bracket 3 fixed to the lower part of the leaf spring 36.
7, the swing center O of the swing beam 31 is swingably attached to the pivot bracket 37. Reference numeral 38 is a shackle that connects the rear end of the leaf spring 36 to the shackle bracket 35.

The swing beam 31 has an eccentric hub carrier 49 which can swing forward, and an axle 6 of the idler wheel 6 mounted on the swing beam 31.
a is rotatably attached, and an axle 7a of the drive wheel 7 is provided on the rear side.
Is rotatably attached. The hub carrier 4
Reference numeral 9 adjusts the tension of the crawler belt 8 by being eccentrically rotated.

The distance A from the swing center O of the swing beam 31 to the rotation center F of the idler wheel 6 is set longer than the distance B from the swing center O to the rotation center R of the drive wheel 7, which is preferable. Is a ratio of the distance A to the distance B of about 2: 1 (A: B = 2: 1). Therefore, the distance A and the distance B
Compared to the case where and are set to a ratio of 1: 1, the swing center O is
It will be set to a position shifted rearward with respect to the front wheel 5.

The center of gravity of the fire-fighting equipment 10 and the center of gravity of the engine 61 (the total center of gravity of these center of gravity is indicated by symbol G) are
It is arranged in the vicinity of the swing center O of the swing beam 31.

Next, the operation of the crawler belt type fire engine 1 having the above structure will be described. In FIG. 1, crawler belts 8 made of a flexible material are attached to idler wheels 6 and drive wheels 7 attached before and after the swing beam 31. For this reason,
Since the crawler belt 8 has a large grip on the road surface, the crawler belt 8 has a high running stability on snowy roads, icy roads, and the like, and also has a high running performance on muddy ground. Further, since the crawler is constructed by attaching the crawler belt 8 made of a flexible material to the idle wheel 6 with tire and the drive wheel 7 with tire, it is about 80 km.
Even when traveling at a high speed of / Hr, there is little vibration and the like, and high speed traveling on a paved road becomes possible.

In FIG. 3, the distance A from the swing center O of the swing beam 31 to the rotation center F of the idler wheel 6 is longer than the distance B from the swing center O to the rotation center R of the drive wheel 7. Therefore, the swing center O is located rearward with respect to the front wheel 5 as compared with the case where the distance A and the distance B are set to a ratio of 1: 1. Therefore, the distance C from the rotation center P of the front wheels 5 to the swing center O of the swing beam 31 becomes long, so that the steering stability when traveling straight at high speed can be improved.

The loads acting on the rotation centers F and R are the components of the load acting on the swing center O (distance A and distance B).
Is a component force that is inversely proportional to the ratio to the driving wheel 7 side and is larger than the idle wheel 6 side. Therefore, when the crawler belt type fire engine 1 travels on a soft ground such as a muddy ground or a snowy road, the crawler belt 8 gets over the soft ground on the side of the idler wheels 6 where a relatively small load acts, and further, The propulsive force can be increased by stepping on this soft ground on the side of the drive wheels 7 where a large load acts.

Furthermore, since the center of gravity G of the fire fighting equipment 10 and the engine 61, which are heavy objects, is near the swing center O of the swing beam 31, the weight of the fire fighting equipment 10 and the engine 61 acting on the swing center O. Will act on the rotation centers F and R with a component force inversely proportional to the ratio of the distance A and the distance B (about 2: 1) (a component force larger on the drive wheel 7 side than on the idle wheel 6 side). . Therefore, as described above, the distance A and the distance B are
The load acting on the swing center O depends on the ratio of
Side and the drive wheel 7 side act in good balance, so that it is possible to improve steering stability when driving straight ahead at high speed, and to improve running performance on soft ground.

[0027]

Since the present invention is configured as described above, it has the following effects. In the crawler belt type fire engine of claim 1, since the crawler belt made of a flexible material is attached to the idler wheels and the drive wheels attached to the front and rear of the swing beam, the grip of the crawler belt is large, so that it can be used on snowy roads and on ice. It can improve running stability on roads and running performance in muddy areas, can pass through mountain roads, enter streams such as streams and rivers, absorb water, and can enter even four-wheel drive vehicles. Can extinguish fires in difficult areas. Further, since the crawler has a structure in which a crawler belt made of a flexible material is attached to the idler wheels with tires and the drive wheels with tires, high-speed traveling on a paved road becomes possible, and the role as an emergency vehicle can be achieved. it can.

Further, since the rear wheel side is a crawler, the wheel base (distance between the rotation centers of the front wheels and the rear wheels) is shortened by the distance from the swing center of the swing beam to the rotation center of the freewheel. . For this reason, it is possible to increase a ground obstacle angle called a ramp breakover angle (an angle of an obstacle existing on the road surface between the wheelbases) more than that of a general four-wheel fire engine, so that a terrain with a high undulation such as over a step or over a ditch. However, it is difficult to hit the underside of the car against obstacles, improving the running performance and facilitating fire fighting.

In the crawler belt type fire engine according to claim 2, the distance from the swing center of the swing beam to the rotation center of the idler wheels is set longer than the distance from the swing center to the rotation center of the drive wheels. This increases the distance from the center of rotation of the front wheels to the center of swing of the swing beam.
It is possible to improve steering stability when traveling straight at high speed.
Further, since the load acting on the swing center of the swing beam acts more on the drive wheel side than on the idle wheel side, when the crawler belt type vehicle is run on a soft ground such as a muddy ground or a snowy road, The crawler belt can overcome the soft ground on the idle wheel side, which has a comparatively small load, and can step on this soft ground on the drive wheel side, which has a large load, to increase the propulsion force, thus improving the running performance on soft ground. Can be improved.

In the crawler belt type fire engine of claim 3, the center of gravity of the fire equipment and the center of gravity of the engine, which are heavy objects, are arranged in the vicinity of the center of swing of the swing beam, so that the center of gravity of the swing idles. The distance to the center of rotation of the wheel,
Depending on the ratio of the distance from the center of swing to the center of rotation of the drive wheels, the load acting on the center of swing acts on the idle wheel side and the drive wheel side in good balance, so when traveling straight at high speed The steering stability of the car can be improved, and the running performance on soft ground can be improved.

Since the crawler belt type fire engine of claim 4 has a passenger seat in the front part of the fire-fighting equipment, it is possible for a fire engineer who is unable to get into the cabin to be on board and to carry personnel necessary for fire fighting activities. You can Further, since there is a passage between the front part of the fire fighting equipment and the rear part of the cabin, it is possible to go to the opposite side without going around the front and rear of the fire engine, and it is easy to carry out quick fire fighting activities.

[Brief description of drawings]

FIG. 1 is a side view of a crawler belt type fire engine according to the present invention.

FIG. 2 is a plan view of a crawler belt type fire engine according to the present invention.

FIG. 3 is a side view showing a drive device and a suspension of the crawler belt type fire engine according to the present invention.

[Figure 4] Side view of a conventional fire engine

[Explanation of symbols]

1 ... Crawler belt type fire engine, 2 ... Car body, 3 ... Cabin, 5 ... Front wheel, 6 ... Idler wheel (intermediate wheel), 7 ... Drive wheel (rear wheel), 8 ... Crawler belt, 10 ... Fire extinguishing equipment, 16
... passenger seats, 17 ... passages, 30 ... rear suspensions, 31 ... swing beams.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Mitsuo Hirabayashi 1-1-1 Ishishiba, Matsumoto City, Nagano Ishikawajima Shibaura Machinery Co., Ltd. Matsumoto Factory

Claims (4)

[Claims] 1. A cabin attached to the front side of the upper body, a fire-fighting facility attached to the rear side of the upper body, a front wheel with tires attached to the front side of the lower body, and a longitudinal intermediate portion attached to the rear side of the lower body. Of a swing beam with a swing center, a freewheel with a tire and a drive wheel with a tire rotatably attached before and after the swing beam, and a flexible material attached to the freewheel and the drive wheel. A crawler belt type fire truck consisting of a crawler belt. 2. The distance from the swing center of the swing beam to the rotation center of the idle wheel is set longer than the distance from the swing center to the rotation center of the drive wheel. The crawler belt type fire engine described in 1. 3. The crawler belt type fire engine according to claim 2, wherein the center of gravity of the fire fighting equipment and the center of gravity of the engine are arranged in the vicinity of the swing center of the swing beam. 4. The crawler belt according to claim 1, wherein the fire-fighting equipment has a passenger seat at a front portion thereof, and further has a passage between a front portion of the fire-fighting equipment and a rear portion of the cabin. Fire engine.