JPH0615764Y2 - Crawler belt type vehicle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a crawler belt type vehicle, and more particularly to a connection structure between a reinforcing structure of the crawler belt type traveling device and an independent suspension type suspension.

[Prior Art] In the Japanese Patent Application No. 62-132389, the present applicant has installed a traveling device, which has a crawler belt arranged between front wheels and rear wheels, on a commercial vehicle having an independent suspension type front suspension on both left and right sides. We have proposed a crawler belt type vehicle equipped with it.

[Problems to be Solved by the Invention] As described above, in the crawler belt type vehicle by the retrofitting method, it is necessary to connect and reinforce the left and right traveling devices in terms of running stability and strength.

However, when the left and right running devices are connected and reinforced, the independent suspension suspension has the function of moving left and right individually.Therefore, between the left and right running devices, bumps and vehicle width direction due to rebound Relative position change (slide) occurs.

Therefore, the object of the present invention is to improve the running stability and strength by connecting and reinforcing the left and right traveling devices, and to improve the running stability and strength, as well as the bumps generated between the independent suspension suspension and the traveling device, and the vehicle width direction due to rebound. It is an object of the present invention to provide a crawler belt type vehicle capable of absorbing a relative position change (slide).

[Means for Solving the Problems] In order to achieve the above object, the present invention supports at least one of the front and rear wheels of a vehicle 1 having at least four wheels by an independent suspension type suspension F, and the front and rear wheels can be freely rotated. Supported by the crawler belt 2 between the front and rear wheels.
In the crawler belt type vehicle having the traveling devices 20 each having the 9 arranged on both left and right sides of the vehicle body,
The space between them is connected by reinforcing members 27 and 28 extending in the vehicle width direction, and the independent suspension type suspension F and the traveling device 20 are connected by a leaf spring 26 that is deformable in the vehicle width direction.

[Operation] Since the left and right crawler belt type traveling devices 20 are connected by the reinforcing members 27 and 28 in the vehicle width direction, the traveling safety can be improved and the strength can be improved.

Since the independent suspension type suspension F and the traveling device 20 are connected by the leaf spring 26 which can be deformed in the width direction of the vehicle body, the bumps between the independent suspension type suspension F and the traveling device 20 and the vehicle width direction due to the rebound are generated. The relative position change (slide) can be absorbed smoothly and the riding comfort can be improved.

[Example] An example will be described below with reference to the accompanying drawings.

In FIG. 1, 1 is a commercially available four-wheel vehicle, 20 is a crawler belt type traveling device, and is a one-box type four-wheel vehicle 1 in the figure, but it is also applicable to trucks and passenger cars. 2 and 3, F is a front suspension and R is a rear suspension. Front suspension F is knuckle 2, lower arm 3,
It is an independent suspension type composed of a coil spring 4 and a damper 5 and the like, and a front wheel hub 6 is supported by a knuckle 2. Rear suspension R is axle beam 7,
Axle tube 8, leaf spring 9, damper 10
11 is a propulsion shaft, 12 is a rear differential housing, and a rear axle 13 is shown in FIG.

The crawler belt type traveling device 20 mounted on both left and right sides of the four-wheeled vehicle 1 having the above-mentioned axle suspension device is a frame 21.
Driven sprockets 31 rotatably supported in the front and rear
And a drive sprocket 41 with a crawler belt 29 hung. Six front and rear rolling wheels 23 ... Are supported on the skirt portion 22 below the frame 21, and two front and rear guide wheels 24 are supported on the frame 21 via stays as shown in the figure.

Then, a two-ply leaf spring 26, whose plate surface extends vertically in the vertical direction, is bolted to a bracket 25 provided so as to project inward of the front portion of the frame 21, and a reinforcing pipe 27 is provided between the left and right brackets 25, 25. The leaf spring 26 is mounted by bolting the front portion of the leaf spring 26 to the front wheel hub 6. Also frame 2
The drive sprocket shaft 42 supported at the rear portion is connected to the rear axle 13 via a speed reducer as shown in FIG. 4 described later, and the reinforcing pipe 28 is also provided between the rear ends of the left and right frames 21 and 21. Build.

As mentioned above, especially the independent suspension front suspension F
Of the wheel hub 6 supported by the knuckle 2 and the bracket 25 provided on the frame 21 of the crawler belt type traveling device 20.
And 2 are connected by a leaf spring 26, which is a stack of two plates whose plate surfaces extend in the vertical direction in the front-rear direction.
Even if the front and rear reinforcement pipes 27 and 28 are connected to each other, the bumps between the independent suspension type front suspension F and the crawler belt type traveling device 20 and the relative position change (slide) in the vehicle width direction due to rebound are caused by the plate. It is smoothly absorbed by the elastic deformation of the spring 26 in the vehicle width direction.

Here, FIG. 5 shows an independent suspension type front suspension F.
It shows the disassembled state of the knuckle 2 and the wheel hub 6 of
Prior to mounting the crawler belt type traveling device 20 as described above, an elastic rubber bush 15 is provided between the knuckle 2 and the axle 16 integrally projecting inward from the wheel hub 6. That is, normally, the axle 16 is rotatably assembled to the knuckle 2 via a bearing, but since the traveling device frame 21 (bracket 25 and leaf spring 26) as described above is fixed to the wheel hub 6, the bearing is Is eliminated, and the axle 16 is assembled to the knuckle 2 through a rubber bush 15 capable of absorbing prying and some sliding. Incidentally, 17 is a circlip, 18 is a flat washer, and 19 is a nut, and these are normal parts.

Next, the structure of FIG. 4 will be described.

A carrier 51 is spline-fitted to the inner end of the drive sprocket shaft 42, and a sun gear 53 and a ring gear 54 that mesh with a plurality of planetary gears 52 rotatably supported by the carrier 51 are provided. Constitute. Further, the drive sprocket shaft 42 is the ring gear 5
4 is supported by a reduction gear case 56 via bearings 57, and the reduction gear case 56 is supported by the frame 21 via bearings 58.

Then, the reducer case 56 is mounted on the rear axle 13 with the bearing 5
9 and the sun gear 53
Is spline-fitted to the tip of the rear axle 13. In the assembled state as described above, the rear axle 13, the reduction gear case 56, the drive sprocket shaft 42, and the frame 21 are prevented from coming off by snap rings at both ends of the bearing as shown in the drawing. Lubricating oil is enclosed in the reducer case 56,
An oil seal is provided as shown.

Further, a brake disc 43 is fixed to the projecting portion of the drive sprocket shaft 42, and a brake caliper 44 for clamping and braking the brake disc 43 is provided, thereby forming a brake device 45 capable of stopping the drive sprocket 41. Further, a clutch disc 46 is fixed to the inner end of the reduction gear case 56, and a clutch caliper 47 that clamps and brakes the clutch disc 46 is provided, whereby the drive force transmission from the rear axle 13 to the drive sprocket 41 can be interrupted. The clutch device 48 is defined as follows.

Here, a bearing pipe 61 is assembled on the rear axle 13 located inside the speed reducer case 56 via a bearing 62. The bearing pipe 61 is mounted on the speed reducer case 56 as shown in FIGS. 2 and 3. Is fixed to a reinforcing plate 63 that is installed between the frame 21 and the reinforcing pipe 28 so as to surround the front and the inside.

In FIG. 4, when the clutch device 48 is in the ON state, that is, when the disk 46 is clamped and braked by the caliper 47, the ring gear 54 integrated with the speed reducer case 56 is fixed, so that the sun gear 53 that rotates integrally with the rear axle 13 is provided. The planetary gear 52 revolves around and the drive force is transmitted from the sprocket shaft 42 through the carrier 51 by decelerating the drive sprocket 41. At this time, the brake device 45 is OFF
Held in a state. Conversely, when the clutch device 48 is turned off and the brake device 45 is turned on, that is, when the disc 43 is clamped and braked by the caliper 44, the sprocket shaft 42 is fixed and the carrier 51 is also fixed. The rotation of the sun gear 53 is the planetary gear 5
It is transmitted to the reduction gear case 56 that is integral with the ring gear 54 via only the two rotations, so that the reduction gear case 56 is in the idling state.

Here, the sprocket shaft 32 of the driven sprocket 31 is also provided with a brake device 35 including a brake disc 33 and a brake caliper 34. In this brake device 35, when the brake pedal is depressed, the hydraulic pressure of the master cylinder (both not shown) is set to the left and right brake calipers 3.
4, the brake disc 33 is clamped and braked simultaneously on the left and right sides, the rotation of the sprocket shaft 32 is stopped, and the left and right driven sprockets 31 are simultaneously stopped.

In the above, the normal steering link mechanism originally present in the vehicle 1 is separated from the steering shaft, and new master cylinders for brake and clutch that interlock with the steering shaft are newly provided (above, not shown).

The above-described turning control of the crawler belt type vehicle is as follows.

First, the hydraulic pressure applied to the clutch caliper 47 on the inside of the turn is returned to the master cylinder in conjunction with the steering operation of the steering handle, whereby the clutch device 4 on the inside of the turn is operated.
Turn off 8. Next, the hydraulic pressure is sent from another master cylinder to the brake caliper 44 on the inside of the turn to clamp the brake disc 43, and the brake device 45 on the inside of the turn is turned on with a delay.

In this way, when turning, the drive sprocket 4 inside the turning is rotated.
Since the stop by braking is performed after the transmission of the driving force to No. 1 is stopped, the crawler belt 29 on the inside of the turn can be surely stopped to improve the turning performance.

In the embodiment, the rear wheel drive type four-wheel vehicle is used, but a front wheel drive type four-wheel vehicle can be equipped with a crawler belt type traveling device by reversing the front and rear, and the rear wheel side is independently suspended and both front and rear wheels are independently suspended. The present invention can also be applied to the above vehicle, and the independent suspension system is not limited to the embodiment.

[Advantage of the Invention] As described above, according to the present invention, since the left and right crawler belt type traveling devices are connected by the reinforcing member in the vehicle width direction, traveling stability can be improved and strength can be improved. Since the independent suspension type suspension and the traveling device are connected by a leaf spring that can be deformed in the width direction of the vehicle body, the action of this leaf spring causes the bump between the independent suspension type suspension device and the traveling device and the vehicle width direction due to rebound. The relative position change (slide) can be smoothly absorbed, and therefore the riding comfort can be improved.

[Brief description of drawings]

FIG. 1 is a schematic side view of a crawler belt type vehicle to which the present invention is applied, and FIGS. 2 and 3 are perspective plan views and perspective views showing the relationship between an axle suspension device and a crawler belt type traveling device according to the present invention. FIG. 4 is a half sectional view showing the structure of the drive shaft portion, and FIG. 5 is an exploded perspective view of the knuckle and axle portion. In the drawings, 1 is a vehicle, F is an independent suspension type suspension, 20 is a crawler belt type traveling device, 21 is a frame, 26 is a leaf spring, 27 and 28 are reinforcing materials, and 29 is a crawler belt.

Claims (1)

[Scope of utility model registration request] 1. A vehicle having at least four wheels, at least one of the front and rear wheels is supported by an independent suspension type suspension to rotatably support the front and rear wheels, and a crawler belt is arranged between the front and rear wheels. In a crawler belt type vehicle that has traveling devices installed on both left and right sides of the vehicle body, the left and right traveling devices are connected by a reinforcing member that extends in the vehicle width direction, and the independent suspension suspension and the traveling device are in the vehicle width direction. A crawler belt type vehicle characterized by being connected by a deformable leaf spring.