JP2888319B2 - Suspension device for crawler belt type traveling device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suspension device for a crawler belt type traveling device provided on both right and left sides of a vehicle body.

[0002]

2. Description of the Related Art The applicant has previously provided rubber crawler belts on left and right drive wheels and idle wheels, and provided left and right axle support members for supporting both drive wheels and idle wheels. (Japanese Utility Model Application Laid-Open No. 3-129580). In the suspension device of the crawler belt type traveling device, the suspension on the crawler belt side is configured by a swing beam type.

[0003]

However, Japanese Utility Model 3
The suspension of the swing beam type described in JP-129580 is formed in a U-shape in plan view with an axle beam connecting the left and right swing beams and one end of the swing beam, and the other end of the swing beam is opened. Therefore, when traveling on rough roads or running at high speed, the rigidity against moment stress in the left and right direction is not sufficient, and the left and right swing beams are directed in different directions, and as a result, the direction of one wheel changes and straightness May be damaged. Therefore, the present invention improves the technology described in Japanese Utility Model Laid-Open No. 3-129580,
It is an object of the present invention to further increase the rigidity of a swing beam type suspension against a moment in the left-right direction when traveling on a rough road, traveling at high speed, or the like.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a crawler belt mounted on a drive wheel and an idler wheel which are respectively disposed on the right and left sides of a vehicle body, and a suspension on the crawler belt side is provided. In the suspension system of a crawler belt type traveling device composed of a swing beam, the left and right swing beams
The rear ends of the arms are fixed with a connecting rod, and the front ends are
By connecting with a rod through a bush,
A swing beam that is closed in the shape of a square
Swing the center of the swing beam in the front-rear direction
And connecting rods and rods to the vehicle body
Free, and after the left and right swing beams
The drive wheel is supported at the end, and the idler wheel is supported at the front end.
It is characterized by the following.

[0005]

According to the above means, the front and rear portions of the swing beam are connected to each other by rods, so that the swing beam has a closed shape in a square shape in plan view, so that the rigidity in the left-right direction is improved. However, when the vehicle is traveling on a rough road, traveling at high speed, or the like, there is no danger that the left and right swing beams are directed in different directions as in the related art, and as a result, the direction of one wheel is changed and the straightness is impaired.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a schematic side view of a crawler belt type six-wheeled vehicle to which the present invention is applied, FIG. 2 is a side view showing a driving device and a suspension thereof, and FIG.

In FIG. 1, 1 is a vehicle body, 11 is a front wheel, 13 is a rear wheel, 15 is a free wheel, and 17 is a crawler belt mounted between the rear wheel 13 and the free wheel 15. Car body 1 is cabin 2
The free wheel 15 is disposed between the front wheel 11 and the rear wheel 13 as shown in the figure.
Tires 12, 14, and 16 are mounted on the tires 3 and 15, respectively.

A steering force from a steering wheel 4 in the cabin 2 is transmitted to a pair of left and right front wheels 11 by a steering device 5. The steering device 5 includes a steering shaft 6, a gear box 7, a steering arm 8, a tie rod 9, and the like. The tie rod 9 is connected to a knuckle 21 that supports the front wheel 11.

The front wheel 11 includes a front suspension 22
And is independently suspended and supported with respect to the vehicle body 1. That is, suspension components such as a radius rod 23 and a hydraulic damper 24 are provided between the lower part of the cabin 2 of the vehicle body 1 and the knuckle 21 for the front wheels.

An engine 25 is mounted and supported under the carrier 3 of the vehicle body 1.
3 and idler wheels 15 are provided. The rotational driving force from a transmission integrated with the engine 25 is transmitted to a pair of left and right rear wheels 13 by a rear wheel drive device 26. The rear wheel drive device 26 includes a differential device 27 at the rear of the engine 25 and rear wheel drive shafts 28, 28.
8 and 28 are connected to rear wheel axles 29 and 29 supported at the rear of the swing beam 31.

The rear wheel 13 and the idler wheel 15 in front of the rear wheel 13 are supported by the swing beam 31 serving as an axle support member. A rear suspension 32 for independently supporting the swing beam 31 with respect to the vehicle body 1 is provided. I have. That is, the rear suspension 32 includes the spring bracket 301 and the shackle bracket 3 under the carrier 3 of the vehicle body 1.
02, a center portion of the swing beam 31 is swingably connected to the leaf spring 33 via a pivot bracket 10 by a pivot shaft 30, and a front portion and a rear portion of the swing beam 31. Bracket 30 between the lower part of the carrier 3
Hydraulic dampers 34, 35 are provided via the respective 4, 305.

The left and right swing beams 31, 31 are shown in FIG.
As shown in FIG. 5, the rear portions are fixed to each other by an axle beam 36 which is a torsion-free connecting rod. In order to connect the front portions of the swing beams 31 with each other with the rod 37, fixing plates 38, 38 are attached to the front ends of the swing beams 31, respectively. The rod 37 is provided with mounting holes 39, 39 at both ends in the front-rear direction, respectively, and rubber bushes 40, 40 are interposed in the mounting holes 39, 39, and mounted on the brackets 42, 42 with bolts 41, 41, respectively. , Brackets 42, 42, respectively,
The front portions of the swing beams 31, 31 are connected to each other by being attached to the swing beams 31. Further, the rod 37 bends the intermediate portion 43 upward to form a trapezoidal shape, and avoids interference with a later-described front wheel drive device (propulsion shaft) that transmits the rotational driving force from the engine 25 to the front wheels 11, 11. I have.

In summary of the above description, FIGS.
As you can see, the rear suspension is
The rear ends of the beams 31, 31 are fixed to each other with a connecting rod 36.
And the front ends of the rods are
Closed in a square shape in plan view by connecting at 37
Swing that is closed in the shape of a square beam
The center of the beam in the front-rear direction (middle of the front-rear direction)
It is suspended so that it can swing. Moreover, the connection lock
Arm 36 and rod 37 are free with respect to the vehicle body 1.
(The connecting rod 36 and the rod 37 are attached to the vehicle body 1
In a free state without opening). further,
Drive wheels (rear) are provided at the rear ends of the left and right swing beams 31, 31.
Wheel) 13 and the idler wheel 15 at the front end,
A crawler belt 17 is mounted around the driving wheel 13 and the idler wheel 14.
It is a thing.

By connecting the front portions and the rear portions of the swing beams 31 and 31 with the rods 36 and 37, respectively, as described above, the swing beam 31 is closed in a square shape in plan view as shown in FIG. The rigidity in the left and right direction is improved because of the shape, and the left and right swing beams are directed in different directions as in the past when traveling on rough roads, high speed running, etc. As a result, the direction of one wheel changes and it goes straight There is no possibility that the performance is impaired. In the drawing, reference numeral 44 denotes a torque canceling portion at the center of the axle beam 36, and reference numeral 45 denotes a shackle for connecting the rear end of the leaf spring 33 to the shackle bracket 302 described above.

The crawler belt 17 made of rubber is mounted on the rear wheel tire 14 and the idle wheel tire 16. Garters 19..., 20. The crawler belt 17 does not come off from the rear wheel tire 14 and the idle wheel tire 16. The garter is formed outside the tread portion 18 with a length 19 that is longer than the height of the curb of the road so that the crawler belt 17 does not come off when the vehicle travels even if it interferes with the curb of the road.

An eccentric hub carrier 46 is provided at the front of the swing beam 31 so as to be swingable by a pivotal connection, and the idle wheel axle 39 is supported by the hub carrier 46. The tension of the crawler belt 17 can be adjusted by eccentrically rotating the hub carrier 46. The crawler belt 17 is accommodated within the width of the vehicle body 1.

The rotational driving force from a transmission integrated with the engine 25 is transmitted to a pair of left and right front wheels 11 by a front wheel drive unit 48. The front wheel drive device 48 includes a propulsion shaft 49 extending forward of the engine 25, a differential device 50, and front wheel drive shafts 51, 51. The front wheel drive shaft 51 is connected to a front wheel axle 52 supported by the knuckle 21.
Incidentally, 53 is a fuel tank, 54 is a spare tire, 55 is a battery, and 56 is a muffler.

The crawler belt type six-wheeled vehicle of the present invention constructed as described above is driven at a relatively high speed similarly to a general vehicle by the ground driving force of the crawler belt 17 and the ground driving force of the front wheel tires 12, 12. It is possible to drive on public roads. In addition, it is particularly excellent in running performance on soft land such as farmland and irregular land such as sand, snow and gravel. And this running performance is rear wheel 1
3 and the swinging beam 31 suspended on the idler wheel 15 swings about the pivot shaft 30, so that when traveling on soft terrain such as farmland or irregular terrain such as sand, snow and gravel,
This is because the right and left crawler belts 17, 17 can obtain the ground followability of each. This makes it possible to use the vehicle as a vehicle for transporting agricultural machinery, fertilizer, etc., particularly by entering a farmland.

Since the crawler belt 17 is accommodated within the width of the vehicle body 1, the crawler belt 17 does not protrude to the side of the vehicle body 1 and is compactly constructed without increasing the overall width of the vehicle, and the type certification of the light vehicle is approved. Can be obtained. Further front wheel 1
1 is independently suspended, and the rear wheel 13 and the idler wheel 15 on which the crawler belt 17 is mounted are also independently suspended.
9 and the swing beam 31 supporting the idle wheel axle 47
Are supported by the leaf spring 33, so that the crawler belt 17 is excellent in terms of following the ground and riding comfort.

In this embodiment, an example in which the present invention is applied to a light truck is shown. However, the present invention can be applied to a light vehicle such as a one-box type vehicle and other types of vehicles .

[0021]

As described above, according to the present invention, the left and right
Attach the rear ends of the swing beams with connecting rods
Connecting the ends with a rod via a rubber bush
Therefore, a swing beam that is closed in a square
The center of the closed swing beam in the front-rear direction is
It is suspended so that it can swing, and the connecting rod and
The left and right swings
Drive wheels are supported at the rear end of the g-beam, and idle wheels are mounted at the front end.
By supporting the swing beam , the swing beam becomes a closed shape of a square shape in plan view, so the rigidity in the left and right direction improves,
When the vehicle is traveling on a rough road, traveling at a high speed, or the like, there is no danger that the left and right swing beams are directed in different directions as in the related art, and as a result, the direction of one wheel changes and the straightness is impaired.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a crawler belt type six-wheeled vehicle to which the present invention is applied.

FIG. 2 is a side view showing the driving device, suspension and the like.

FIG. 3 is a plan view of the same.

FIG. 4 is a diagram taken along a line 4-4 in FIG. 3;

FIG. 5 is an assembly drawing of the swing beam.

[Description of Signs ] 1 ... body, 13 ... drive wheel (rear wheel), 15 ... idle wheel, 17
... Crawler belt, 31 ... Swing beam, 32 ... Black
-Suspension on rear side (rear suspension
), 36 ... connecting rod (axle beam), 37 ... b
40, rubber bush.

Continuation of the front page (56) References JP-A-3-246109 (JP, A) JP-A-48-14028 (JP, A) JP-A-3-129580 (JP, U) JP-B-57-25404 (JP, A) , B2) Jikken Sho 20-20486 (JP, Y2) (58) Field surveyed (Int. Cl. ⁶ , DB name) B62D 55/104 B60G 31/05-21/055 B60G 5/00

Claims (1)

(57) [Claims] 1. A suspension device for a crawler belt type traveling device in which a crawler belt is mounted on a driving wheel and an idler wheel disposed on both right and left sides of a vehicle body, and a suspension on the crawler belt side is constituted by a swing beam. fixed end between the right and left rear swing beam connecting rod, due to be connected through the rod front end with each other via a rubber bush
And a swing beam that is closed in a square shape in plan view,
Swivel the center of the closed swing beam in the front-rear direction
Connecting rods and rods
To the vehicle body,
Drive wheels at the rear end of the arm and idler wheels at the front end.
Suspension system of the crawler belt traveling unit which is characterized in that by Seung.