JPH0714141Y2 - 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. Sho 62-132389, the applicant of the present invention has a crawler equipped with a traveling device in which a crawler belt is arranged between front wheels and rear wheels in a commercial vehicle having an independent suspension type front suspension. A belt type vehicle is proposed.

[Problems to be Solved by the Invention] In the crawler belt type vehicle by the retrofitting method as described above, it is necessary to connect the front and rear portions of the left and right traveling devices to each other for reinforcement in terms of running stability and strength.

However, when the front and rear parts of the left and right traveling devices are connected and reinforced, the independent suspension type suspension has the function of moving independently, so between the left and right traveling devices,
For example, twisting or sliding may occur between the knuckle and the axle. It has been impossible to absorb such twisting and sliding with a conventional bearing having a bearing interposed between the knuckle and the axle.

Therefore, the object of the present invention is to improve the running stability and strength by connecting and reinforcing the front and rear parts of the left and right traveling devices, and to absorb the twisting and sliding generated between the independent suspension suspension and the traveling device. To provide a crawler belt type vehicle.

[Means for Solving the Problems] In order to achieve the above objects, the present invention uses at least one of the front and rear axles of a vehicle having at least four wheels as a drive shaft,
In addition, at least one of the front and rear wheels is an independent suspension type suspension, the front and rear wheels are rotatably supported by frames provided on the left and right, and a crawler belt is arranged between the front and rear wheels in a vehicle body. The front and rear portions of the left and right frames are attached to each other by reinforcing members extending in the vehicle body width direction, and the independent suspension type suspension and the traveling device are coupled via an elastic body.

[Operation] Since the front and rear parts of 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 and the strength can be improved.

Since the elastic body 15 is interposed between the independent suspension type suspension F and the traveling device 20, it is possible to absorb the twisting and the slide generated between the two by the deformation of the elastic body 15.

[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. The front suspension F is an independent suspension type composed of a knuckle 2, a lower arm 3, a coil spring 4, a damper 5 and the like, and a front wheel hub 6 is supported by the knuckle 2. The rear suspension R is composed of an axle beam 7, an axle tube 8, a leaf spring 9, a damper 10, etc., 11 is a propulsion shaft, 12 is a rear differential housing,
The rear wheel 13 is shown in FIG.

A crawler belt type device 20 mounted on both left and right sides of a four-wheeled vehicle 1 having the above-mentioned axle suspension system has a crawler belt 29 hung on a driven sprocket 31 and a drive sprocket 41 which are rotatably supported on the front and rear of a frame 21, respectively. It is dressed up. 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 25 are supported on the frame 21 via stays 24. Then, after mounting the bracket 26 provided inside the front portion of the frame 21 to the front wheel hub 6 by bolting, the reinforcing pipe 2 is provided between the left and right brackets 26, 26.
Build 7. The drive sprocket shaft 42 supported by the rear portion of the frame 21 is connected to the rear axle 13 via a speed reducer as shown in FIG. The reinforcing pipe 28 is installed.

Here, FIG. 5 shows an independent suspension type front suspension F.
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, a rubber bush 15 which is an elastic body is interposed 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 with a bearing interposed therebetween, but since the traveling device frame 21 (bracket 26) is fixed to the wheel hub 6 as described above, the bearing is unnecessary. The axle 16 is assembled to the knuckle 2 with a rubber bush 15 capable of absorbing prying and sliding. In addition, 17 is a circlip, 18
Is a flat washer, 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. The drive sprocket shaft 42 is supported by a reduction gear case 56 to which a ring gear 54 is fixed via bearings 57, and the reduction gear case 56 is supported by the frame 21 via bearings 58.

Then, the speed reducer case 56 is mounted on the rear axle 13 via the bearing 59, and at that time, the sun gear 53 is attached to the rear axle 13.
13 Fit the spline on the tip. In the above assembled state, the rear axle 13, the reduction gear case 56, the drive sprocket shaft 42
Also, as shown in the drawing, snap rings at both ends of the bearing are used to prevent the respective parts of the frame 21 from coming off. Lubricating oil is enclosed in the reducer case 56, and an oil seal is provided as shown in the figure.

Further, a brake disc 43 is fixedly mounted on 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 fixedly mounted on the inner end of the speed reducer case 56, and a clutch caliper 47 for clamping and clamping the clutch disc 46 is provided, whereby the drive force transmission from the rear axle 13 to the drive sprocket 41 can be interrupted. Clutch device 48
Make up.

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 reducer case
Since the ring gear 54 integrated with 56 is fixed, the rear axle
Planetary gear around the sun gear 53 that rotates together with the 13
52 revolves around the carrier 51, and the drive force is transmitted from the sprocket shaft 42 to the drive sprocket shaft 41 via the carrier 51.
At this time, the brake device 45 is held in the OFF state. Conversely, the clutch device 48 is turned off and the brake device 45 is turned on,
That is, when the disk 43 is clamped and braked by the caliper 44, the sprocket shaft 42 is fixed and the carrier 51 is also fixed, so that the rotation of the sun gear 53 integrated with the rear axle 13 is performed only through the rotation of the planetary gear 52. This is transmitted to the speed reducer case 56 that is integral with 54, and the speed reducer case 56 is in a free rotation 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 sent to the left and right brake calipers 34, and the brake disc 33 is clamped by the left and right simultaneously to stop the rotation of the sprocket shaft 32. The left and right driven sprockets 31 are stopped at the same time.

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 wheel, and the clutch device 48 on the inside of the turn is thereby released.
Turn it off. Next, the hydraulic pressure is sent from another master cylinder to the brake caliber 44 on the inside of the turn to send the brake disc 43.
The brake device 45 on the inside of the turn is turned on with a delay.

In this way, the drive sprocket shaft inside the turning
Since the stop by braking is performed after the transmission of the driving force to 41 is stopped, the crawler belt 29 on the inside of the turn can be surely stopped and the turning performance can be improved.

In the embodiment, the rear wheel drive type four-wheel vehicle 1 is used.
The present invention can also be applied to a vehicle in which the rear wheels are independently suspended and the front and rear wheels are independently suspended, 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 front and rear portions of the left and right crawler belt type traveling devices are connected by the reinforcing member in the vehicle width direction, the traveling stability can be improved and the strength can be improved. In particular, since the elastic body is interposed between the independent suspension type suspension and the traveling device, it is possible to absorb the twisting or the slide generated between the two by the action of the elastic body.

[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 and perspective views showing the relationship between an axle suspension device and a crawler belt 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 interposed portion of the elastic member according to the present invention. In the drawings, 1 is a vehicle, F is an independent suspension type suspension, 2 is a knuckle, 15 is an elastic body, 16 is an axle, 20 is a traveling device, 21 is a frame, 27 and 28 are reinforcing materials, and 29 is a crawler belt. is there.

Claims (1)

[Scope of utility model registration request] 1. A front and rear axle of a vehicle having at least four wheels is a drive shaft, at least one of the front and rear axles is an independent suspension suspension, and the front and rear wheels are rotatably supported by frames provided on the left and right. A traveling device formed by disposing a crawler belt between the front wheels and the rear wheels is mounted on the vehicle body, and front and rear portions of the left and right frames are connected by reinforcing members extending in the vehicle width direction, respectively. A crawler belt type vehicle characterized in that the independent suspension type suspension and a traveling device are coupled via an elastic body.