FI88483B - Articulated construction for coupling together successive caterpillar-wheel chassis - Google Patents

Description

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The present invention relates to an articulation system for connecting two successively mounted track or roller frame frames. A frame joint that allows rocking or longitudinal tilting movement of the frames and an associated joint that allows directional control is controlled by the adjustment arms and their controls. In addition, 10 joints can be connected, which enables the rotation of the frames, i.e. the mutual lateral tilting.

In two motor-driven track vehicles mounted in series, the coupling joints and steering joints are able to operate very limitedly, ie with a small amount of movement, because the longitudinal tilt joint only allows the front and rear of the rear roller

20 Although it has not been possible to continuously change the level of the rollers in a series of tracks connected while driving, it has not been possible to emphasize or lighten the contact of the tracks with the ground at the desired level according to the terrain or conditions (such as difficult snow conditions in winter).

The total angle change obtained with the front and rear rollers in the longitudinal tilt and steering directions is limited, as the transmission is often most advantageous to transfer between the front and rear rollers at the universal joint and at 30 joints at the articulation such as e.g.

in the Swedish-made Bandvagen.

The present invention makes the total up / down angle and the directional steering angle of the bogie or track frames significantly increased.

2 88483 This invention is a significant improvement over patent application FI-133/66. This frame articulation and its adjusting arms, which can be e.g. hydraulic cylinders, have the following advantages: weighting, lightening and damping of the front / rear track or bogie in the range of motion of the articulation 5 and the possibilities of use provided by the articulation locking. Also in the present invention, with one front frame and one adjusting arm between the rear frame and the frame articulation 10, it is possible to weight the track or bogie gear, e.g. this cannot be achieved by the cylinders in patent No. 60832. In the present invention, it is still possible to rotate about the longitudinal axis, i.e. the (X) axis, and to control it.

The object of the present invention is to provide continuous even contact of the tracks and bogie wheels, even on uneven ground, even in varying terrain conditions along the entire track or bogie gear by means of this special articulation and its control devices.

The present invention provides relief for the desired track or bogie, e.g. when in soft snow or difficult terrain, where the articulation allows the weight of the tracks 25 or bogie gears to be distributed even when towing a heavy load and / or when crossing an awkward terrain obstacle. In this case, the track or bogie gear that is rising over the obstacle must be lightened and at the same time the second track or bogie gear is weighted, whereby its attraction is improved due to the increased surface pressure and the rise over the obstacle is facilitated.

The features of the invention appear from the appended claims.

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In particular, it is an object of the present invention to provide, in addition to a good directional steering joint, large angles of movement for the frame joints and a lateral tilt joint which increases agility. Through their joints, 5 tracks or track wheels provide damping, • weighting / lightening, locking that facilitates the current driving situation. The easiest way to achieve this is with a hydraulic cylinder and its control devices, which are able to continuously regulate the operation of the joints 10 during driving. But it is also possible to perform it pneumatically, mechanically, electrically or even a combination of these.

A great advantage of the invention is also considered to be the rigid locking of the frames. When crossing a large ditch, 15 pit or similar mound, the trunks are locked into one rigid combination, so that there is no need to hurt the slopes of the pit and its bottoms, but it is possible to cross it effortlessly and quickly. If, on the other hand, a larger ditch, such as a sewer or a wide pit, is to be crossed, the joints are adjusted to loosen the rollers, the roller surfaces are made to follow the terrain, and a good traction is continuously transmitted, which can be added to the preferred roller or bogie. position in relation to the terrain, as described above. In this case, in addition to the surface pressure obtained on the roller or bogie wheels in a more advantageous position, such roller force is applied to that roller or bogie wheels via the frames from the articulation system and its push rods by pushing the terrain with which it receives the so-called snake-like effort and lii kehd i nnän.

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The invention is described in more detail below with reference to the accompanying drawings.

Figures 1 and 2 show a frame joint system and a steering and lateral tilt joint according to the invention, seen from the side and from above.

Figure 3 shows an articulation according to the invention with one adjusting and locking rod or two adjusting rods.

Figure 4 shows an articulation of a body, a rotary and 10 directional joints according to the invention, wherein the second body joint and the directional joint are in the same part.

Figures 1 and 2 show the connecting joint of the frames of the bogies or track frames, in which the bearings 2 at the rear of the joint are fixed to the rear frame 14 via a bearing-15 connection. The bearings 1 of the front part of the frame joint are fixed to the front frame 13 in the same way.

The frame joint 1 is between the first frame 1.1 and the front frame 13 and the frame joint 2 is between the second frame 2.1 and the rear frame 14 and allows the longitudinal tilt of the front and rear frames 20 to change relative to each other and to the plane of the joint. When e.g. the control arm 6, the lower end of which is attached to the body 14, is shortened, the lever arm 7 pivots towards the lever arm point 16 and the rear frame pivots about the shaft 11, if instead the control arm 6 is free, i.e. obtained with the hydraulic cylinder control valve adjustment position "free flow", thus allowing the joints 2 to move in the direction of the arrows 10.

The rear part of the rear roller can be weighted by lengthening the arm 6 and the front part of the rear roller is weighted by lengthening the arm 9 and the whole rear roller is weighted by lengthening the arm 6 and at the same time shortening the arm 9 in the correct proportions. The same is true by means of the front roller joints 1 and the lever arm 8 and the adjustment arm 9 35. The tracks are made into a single rigid combination by locking the arms 6 and 9.

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The control takes place on the adjusting arms 12 by changing their length, whereby the front roller body pivots on the joint 4.

The joint 5 enabled by the lateral tilt is a shaft which 5 is attached at one end to the articulated fork 4 and passes through the material pipe 5.1 to the lateral tilt damper and the stop 5.2. The damper can be, for example, rubber and the limiter mechanical.

Traction of the tracks can be transmitted hydraulically or by other means of jol-10 law, such as the cardan shaft and associated bevel gears and articulated joints.

Figure 3 shows the connection of a bogie frame with frame joints according to the invention, the functions of which are adjusted by a fixed rod 7, which has joints at both ends. In this case, its system allows the movements of the frames in the same plane. When the control rod 6 is connected to the system, it can be used to move the frames in the plane, and when the rod 6 is locked, the frames are locked into one rigid combination.

When the rods 7 and 6 are adjustable, i.e. their length can be changed, it is possible to change the frames and their position in longitudinal tilting directions other than the desired levels.

Figure 4 shows from above how the frame joint 1 is attached to the front frame 13 and the rear frame joint 2 is attached to the rear frame. Attached to the same connection is a guide joint 4 which allows changes in the direction of the frames, the tilt joint 5 allows the front frame 13 and the axle Yx to be tilted to the rear frame 14 and 30 with respect to the axis Y2.

The joint 5 allows a mutual rotation deflection of the frames around the X axis.

The advantage of this articulation is that it is lighter and simpler to attach to the frames.

Claims (3)

1. Articulated structure intended for interconnecting successive larval wheel chassis (13,14) and enabling a mutual angular change in which the vertical direction rotatable skulls (1.1,2.1) which are rotatable in both horizontal and longitudinal directions relative to each other such that the skulls (1.1,2.1) are connected to each other by means of a guide member (4,5), which guide member (4,5) is guided at the the first frame (1.1) rotatable in relation to a vertical axis (4) and at the second frame (2.1) rotatable in relation to the longitudinal axis (5) or where the frame (1.1) connected to the chassis is by means of the respective guiding means (5.4) directly connected to a second chassis (14), wherein the directional control is provided with two adjustable arms (12), characterized in that the articulated structure comprises devices (6,7,8,9) for controlling and reading the shells. as (1.1,2.1) rotation in relation to the chassis. Joint structure according to claim 1, characterized in that for controlling said rotation the joint structure comprises a hydraulic or pneumatic actuator (6,9) mounted between the chassis (13, 14 and the shell (1.1,2.1)). 3. Joint structure according to claim 1, characterized in that for the control of said rotation, between the chassis (13,14), at different heights than the shell (1.1), a bar (7) with hinged ends at the chassis is mounted, the length of which can be adjusted with the hydraulic or pneumatic actuator.