JPS5836623Y2 - Track changing device for tracked vehicles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a new and improved device for arbitrarily changing the spacing between the inner track strips of a crawler or other tracked vehicle having endless track strips.

Self-propelled vehicles in various construction and civil engineering work machines generally use endless track belts such as crawlers, but in such tracked vehicles, the track belts installed on both sides of the vehicle body prevent the vehicle from moving forward. However, due to road transport restrictions in the lateral direction, it may not be possible to provide sufficient spacing between the inner track belts.

In the case of small or medium-sized vehicles, the width of both gauges does not need to be wide enough to take transportation restrictions into account, but in recent years, as machines have become larger, the working range has increased and the number of working devices has increased. In order to ensure lateral stability while increasing weight, packet capacity, and lifting capacity, the overall gauge width tends to gradually increase.

In this way, if the gauge width required to ensure stability during work exceeds the limit for aisle transport, a means of changing the gauge spacing between work and transport becomes necessary. However, the basic method for changing this is to use a method in which the car body and crawler frame are made separable in advance when configuring the lower car body structure, and the two are connected using a suitable i-engaging means. During road transportation, the gauge spacing is narrowed to the transportation limit width 1, and during work, the gauge spacing is widened to the level necessary to ensure stability. Various gauge changing devices have been developed and implemented as means for changing the gauge. However, each of the conventional devices has the following problems, which will be outlined using illustrations.

In other words, Figures 1 and 2 show an example of a tracked vehicle.
Reference numeral 1 denotes a revolving body (vehicle main body), and 2 a crawler. Mounting is supported on the crawler frame.

In addition, 5 is a boom that can be raised and lowered as a work equipment, 6 is a cylinder for driving the boom, 7 is an arm, 8 is a cylinder for driving the arm, 9 is a packet at the tip of the arm, 10 is a cylinder for driving the packet, and both of them are As mentioned above, it is necessary to change the track width W of the crawler 2.2 during transportation and during operation.

The conventional means shown in FIG.
A flange 12 is provided on the end surface of the crawler 1, a flange 14 is provided on the crawler frame 13 of the crawler 2, and both flanges 12
, 14 are removably fastened together with bolts 15, and when transported, these connections are broken and the parts are disassembled and transported separately. 2a, and the width Wt between the end faces of the flanges 12, 12 becomes the maximum width during transportation.

This means can sufficiently firmly connect the two (car body 3 and crawler frame 13) with flanges and bolts, and has a substantially integrated effect with sufficient strength against impact loads during work. However, during transportation, it is necessary to attach and detach the bolts and also to separate them, which requires the assistance of lifting equipment such as a crane, and is troublesome, such as requiring multiple large transportation vehicles to disassemble and transport. be.

In this figure, 28 indicates a lower roller. Also the fourth
, 5, the end 11a of the axle 11 (usually box-shaped in cross section) on the side of the car body 3 is inserted into and removed from the crawler frame 13, and also serves as a guide for the shape and size. This is a means for forming a cutout window 15 and fastening this end portion 11a and the crawler frame 13 with bolts 16.

With this method, it is necessary to precisely machine the notch window 15 for inserting the axle into the crawler frame 13, and since the notch window 15 has a shape that interrupts the uniform cross-sectional structure of the crawler frame 13, track tracking is required. Disadvantageously, the storage space for the track tensioning device 17, which is essential for the crawler 2 in the vehicle, is restricted in the axial direction.

Furthermore, for the same reason, there is the problem that the distance between the pair of front and rear axles 11.11 in the car body 3 cannot be secured sufficiently, and the work to remove and install the bolts 16 is done inside the cutout window 15, which makes the work difficult. It is a point.

In the figure, 18 indicates a driving sprocket, and 19 indicates an idler.

As another model in place of these, the one shown in FIG.
flanges 11b, 1 formed in an overhanging manner on both sides of a;
1b attached to the upper part of the frame 13.
The flanges 11b, 11b are fastened together with bolts 16.

In this method, the bolt is tightened and detached from the exposed flange 11b.

Since the work is carried out on the 11b, work efficiency is improved, but there is a risk that dirt, rocks, mud, etc. will accumulate on the top of the bolt during work, which may hinder the disassembly work due to staining and rust. As is clear from the example, there are still points that require improvement.

Furthermore, in the means illustrated in FIGS. 4 and 5 and FIGS. 6 and 7, the gauge is changed from wide to narrow by sliding the crawler frame in the width direction with respect to the axle 11 of the car body 3. Operation is required.

In other words, in order to reduce the gauge distance of both crawlers 2゜2 to the narrow width necessary for road transportation and enter the working state after transportation, the crawler frame 13, which has been shortened (retracted) to the narrow gauge in the width direction, must be moved outward. For this operation, as illustrated in FIG. 8, use the boom cylinder 6 shown in FIG. 1.2 to raise the crawler frame 13 on one side. One end of a cable 21 such as a wire rope is connected to the same frame 13, and the other end is connected to an arm 7, and by operating an arm cylinder 8 and extending it in the direction of the arrow, the cable 21 is pulled while sliding on the ground with a packet 9. The crawler frame 13 is pulled out to the outside to widen the gauge spacing, that is, the spacing between the crawlers 2, 2, and conversely, the crawler frame 13 that has been widened for transportation is tightened (retracted).
In this case, as shown in FIG. 9, the boom cylinder 6 and the like are similarly driven to tilt the entire body in the width direction, and the crawler 2 on the floating side is rotated to give the crawler 2 vibration due to the rotation. Therefore, a method is generally adopted in which the crawler 2 is slid laterally by its own weight and retracted.

The problem with this operation is that if the tracked vehicle is new and the sliding surface is clean and free of dirt or other foreign matter, it will slide easily, but in general, these working machines are not suitable for the environment in which they are used. Even if you look at it, it is often covered in mud or rusted, so it is often difficult to slide due to its own weight, which takes effort and time, and in severe cases, it may not be able to slide at all.

The present invention takes into consideration the various problems with conventional tracked vehicles as described above, and the car body axle is mounted directly on the crawler frame, and the gauge can be widened or narrowed by sliding the crawler frame in the width direction. The purpose of changing the gauge can be quickly and easily achieved by having a structure that is significantly simpler than the conventional one and can be slid accurately and smoothly, and its characteristics are as follows:
The crawler frame and the car body axle are engaged with each other in the direction of the gauge width so that the gauge width can be changed, and one end of a cable for pulling out and retracting the crawler frame is provided near the retaining portion that can move forward and backward in the crawler frame. An attachable drawer and retracting hook is provided, and a retracting hook through which the cable can be freely moved is provided on the axle side corresponding to the hook installation position.

The present invention will be described in detail below based on the illustrated embodiment.
The figure shows only the main parts of the embodiment of the device of the present invention.
The tracked vehicle as a whole may be the same as that shown in Figs. 1 and 2 and 8 and 9, and the details may be based on these conventional examples, or in the present invention, the crawler frame 13 is changed as shown in the figures. An appropriate number of hooks 22 (two in this embodiment) for both drawer and retraction are attached to the upper surface of the hook 180 via a pivot portion 23 to which one end of a cable 21 such as a wire rope can be detachably connected.
At the end 11a of the axle 11 in the car body 3, a slide leg 25.25 is formed parallel to the hook 22.22 so that its opening notch 24 corresponds to the slide leg 25.25. The slide legs 25.25 are placed on the upper surface of the crawler frame 13 so as to be movable forward and backward, and the same number of retraction hooks 2 are installed using the circumferential side of the opening notch 24 in correspondence with the hooks 22.22 on the frame 13 side.
6.26 is attached, and the cables 21, 21 can be pulled out via the hooks 26, 26 from the hooks 22, 22 which serve both as a drawer and a retractor.

Although not shown, the end portion 11a of the axle 11
is removably fixed on the crawler frame 13 with fasteners such as bolts, and the structure for this is to provide bolt fastening holes on the slide leg 25, 25 side and the corresponding frame 13 side. In this case, if the number of fastening holes on the frame 13 side is, for example, three in the width direction of the top surface, the number of bolt fastening holes on the frame side can be reduced, such as two fastening holes on the slide leg 25 and 25 side. Do more.

This is to accommodate changes in gauge width.

The bolt fastening holes provided in the slide leg portions 25.25 may be formed, for example, by forming a flange in the shape of a lateral overhang on the leg portion 25, and forming a fastening hole in this flange. It is also possible to cut out the top surface to an appropriate width and make a fastening hole on the bottom wall side, but of course, adjusting the width and narrowing and fixing the rear slide leg part 25.25 to the crawler frame is
Other fixed structures may also be used.

In the illustrated example, reference numeral 27 indicates a slide guide for the slide leg 25 provided on the side of the crawler frame 13, and this guide structure is not limited to the illustrated example.
Guide walls sandwiching both sides of the guide wall 50 may be erected, or the leg portions 25 may be slidably inserted as gate-shaped guides.

Changing the gauge distance between the two crawlers 2, 2 according to the present invention is carried out as follows.

That is, during transportation, the crawlers 2, 2 are both in the retracted position toward the car body 3, so when starting work after transportation, one end of the cable 21 is used also as the crawler frame 13. The packet 9 is connected to the hook 22, pulled out as it is, and the other end is connected to the arm 7 on the boom 5 side as shown in FIG. 8, and the arm cylinder 8 is extended in the direction of the arrow. Since the arm 7 slides on the ground and pulls out the cable 21 in the direction of the arrow, the crawler frame 13 is thereby pulled out.

At this time, the bolt connection between the end portion 11a and the frame 13 is removed.

Therefore, after pulling out a predetermined amount, the frame 13 and the end portion 11a are bolted again at the pulled-out position, and by doing this with both crawlers 2, 2, a wide gauge distance necessary for the work can be obtained.

On the other hand, in order to return the crawlers 2, 2 that have been spread out after completing the work to a narrow gauge distance, the series of cables 21 are connected to the dual-purpose hook 22.
After connecting it to the arm 7, hook it on the retracting hook 26 attached to the bottom side of the opening surface 24 between the slide leg parts 25 and 25 of the axle end 11a, and then pull it out to the outside, and connect the other end to the arm 7.
By connecting to the arm 7 and driving the arm 7 in the same way, the tension of the cable 21 is passed through the retracting hook 26, so the same arm movement causes the crawler frame 13 to reversely move the end 1
1a, and after being retracted by a predetermined amount, the end portion 11a and the frame 13 are again bolted together at that position, thereby easily shortening the gauge distance between the two crawlers 2, 2.

As described above, according to the present invention, compared to the conventional device, the dual-purpose hook 22 and the retractable hook 26 are simply paired on the crawler frame 13 side and the corresponding mounting end 11a side of the axle 11. and connect one end of the cable 21 to the hook 22.
The track distance of the crawlers 2, 2 can be changed by connecting to the casing 1 and pulling out the casing 1, or by pulling out the casing 1 from the hook 22 via the hook 26, which is extremely superior in terms of simple structure and ease of operation. .

No other Clen or other equipment is needed at this time;
It can be operated immediately using the boom or arm attached to the tracked vehicle, and in particular when narrowing the track distance of the crawlers 2, 2, the tension of the cable 21 is used, so there is no uncertainty as in the conventional method. The crawler 2 can be retracted under any condition, and the required structure is simpler and there are no difficulties in implementation, etc., compared to those shown in Figures 4 and 5 and Figures 6 and 7. It is advantageous in that it has a sound and simple structure without causing any restrictions or obstacles to the cross-sectional structure of the crawler frame 13 and axle 11, and therefore, it can exhibit excellent advantages such as obtaining a solid and strong structure. .

[Brief explanation of drawings]

Figures 1 and 2 are explanatory diagrams of one example of a tracked vehicle, Figure 3, Figures 4 and 5
Figures 6 and 7 are explanatory diagrams of the main parts of a conventional gauge changing device that can be used even if it falls over, Figures 8 and 9 are explanatory diagrams of conventional gauge changing operations using cables, and Figure 10 is an example of the device according to the present invention. It is a principal part oblique view of an example. DESCRIPTION OF SYMBOLS 1... Revolving body, 2... Crawler, 3... Car body, 6... Boom, 7... Arm, 11... Axle, 11a... Axle end, 13... Crawler frame, 22...Drawer/drawer hook 2
5...Sliding leg portion, 26...Retraction hook, 2
1... cable.

Claims (1)

[Scope of utility model registration request] The crawler frame and the car body axle are engaged with each other in the direction of the gauge width so that the gauge width can be changed, and a cable for pulling out and retracting the crawler frame is provided near the retaining part that can move forward and backward in the crawler frame. A device characterized in that a drawer button and a retracting hook that can be attached to one end of the rope are provided, and a retracting hook through which the cable can be freely moved is provided on the axle side corresponding to the hook installation position. Gauge changing device for rail vehicles.