JPH0121909Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a crawler-type traveling body in which a main frame for traveling is provided with crawler frames on both sides of the main frame so as to be movable near and far.

Conventionally, as this type of crawler type traveling body, those shown in FIGS. 1 to 5 are known.

That is, in the figure, reference numeral 1 denotes a main frame for traveling, and a pair of connecting parts 2, 2 are formed on both sides of the main frame for traveling, and a rotating device 3 is provided at the center, and a rotating device 3 is provided at the center. It is designed to be able to pivotably support a rotating body (not shown). Reference numerals 4 and 4 designate crawler frames disposed on both sides of the main traveling frame 1, each crawler frame 4 having a pair of fitting portions 5, 5 opened in the width direction;
Further, a plurality of lower rollers 6, 6, . . . each having an inner flange 6A and an outer flange 6B are attached to the lower surface side of the crawler frame 4. By slidably fitting each connecting portion 2 of the main frame 1 for traveling into each fitting portion 5,
The crawler frame 4 is arranged on both sides of the main traveling frame 1. Here, in the connecting portion 2 of the traveling main frame 1 and the fitting portion 5 of the crawler frame 4, the height dimension A of the connecting portion 2 and the height dimension B of the fitting portion 5 are shown in FIG. As shown, A<B, and the upper and lower surfaces 2A and 2B of the connecting portion 2 and the upper and lower inner surfaces 5A and 5B of the fitting portion 5 are respectively formed horizontally and parallel to the horizontal ground. In addition, 7,
7,... are four fixed links arranged between the inside of the crawler frame 4 and the traveling main frame 1, and each of the fixed links 7 has a guide hole guided by a guide pin, and the crawler The frame 4 is moved inward or outward to prevent the crawler frame 4 from coming off when it reaches the wheel feed limit width or working width, which will be described later.

Furthermore, a drive wheel and an idler wheel are provided at both ends of each of the crawler frames 4, and are driven to rotate by a hydraulic motor (not shown), and a track link 8 is wound between the drive wheel and the idler wheel. The track link 8 is guided by a lower roller 6 and an upper roller (not shown) provided on the upper surface side of the crawler frame 4.

Further, reference numeral 9 denotes a telescoping cylinder installed between the left and right crawler frames 4, 4 so as to be located above the fixed link 7, and the rod side of the telescoping cylinder 9 is attached to the left crawler frame 4. installed, and the cylinder side is the right crawler frame 4
installed on. Therefore, the telescopic cylinder 9
By expanding and contracting, each crawler frame 4
can move inward or outward with respect to the main traveling frame 1 while being guided by the connecting portions 2, 2.

In the crawler type traveling body constructed in this manner, W ₁ in FIG. 1 is the transport limit width when each crawler frame 4 is moved inward as shown by the dashed line, and W ₂ is the transportation limit width when each crawler frame 4 is moved inward as shown by the dashed line. It is the width when working when moved outward. Further, L is the so-called distance between the overturning supports, and is generally the distance between the outer flanges 6B, 6B of the lower roller 6.

First, extend the telescopic cylinder 9, move the crawler frame 4 outward from the traveling main frame 1, and widen the width between the crawler frames 4 from the transportation limit width _W1 to the working width _W2 . As a result, the maximum distance L between the overturning supports is ensured, and the main frame 1 for traveling is made in a stable working posture. Thereafter, the track link 8 is driven, and the main frame 1 for traveling is caused to travel and rotate while performing a desired operation.

On the other hand, when transporting it on a trailer etc., the telescopic cylinder 9 is shortened and the width between the crawler frames 4 is changed from the working width W ₂ to the transportation limit width W ₁
By narrowing the area to

However, in the crawler type traveling body configured in this manner, the fitting portion 5 is loosely fitted into the connecting portion 2 so that the crawler frame 4 can smoothly move toward and away from the main traveling frame 1. Therefore, when the crawler frames 4, 4 are spread outward in order to secure the maximum distance L between the overturning supports during work, the load applied to the main traveling frame 1 causes the crawler frame 4 to move around the lower roller 6. It receives a rotational force that causes it to rotate clockwise around the inner flange 6A. Therefore, as shown in FIG. 3, the outer flange 6B of the lower roller 6 is separated from the ground and floats upward, and due to the load applied to the main frame 1, the inner flange 6A of the lower roller 6
Not only is a large surface pressure applied to the roller, but also the distance between the overturning supports becomes the distance L' between the inner flanges 6A, 6A of the lower roller 6, and this distance L' between the overturning supports is shortened.

In order to eliminate these drawbacks, the present applicant proposed a crawler-type traveling body shown in FIGS. 4 and 5 as Utility Model Publication No. 13185/1985. That is, in the embodiment shown in FIG. 4, the upper and lower outer surfaces 2'A and 2'B of the connecting portion 2' of the main frame for traveling 1 are formed into inclined surfaces that are inclined downwardly toward the outside with respect to the horizontal ground. Furthermore, in the embodiment shown in FIG. 5, the upper and lower inner surfaces 5'A and 5'B of the fitting part 5' of the crawler frame 4 are formed into inclined surfaces that are inclined downwardly toward the inside with respect to the horizontal plane. Both flanges 6A and 6B of the roller 6 are configured to receive the load equally.

However, in the conventional crawler-type traveling body constructed in this manner, the telescopic cylinder 9 is disposed to expand and contract in the horizontal direction in both cases of FIG. 4 and FIG. The frame 1 will move in a direction slightly different from the direction of the force received from the telescopic cylinder 9. As a result, the fitting parts 5, 5' of the crawler frame 4 come into sliding contact with the connecting parts 2, 2' of the main traveling frame 1, creating a large sliding resistance between them, and reducing the capacity of the telescopic cylinder 9. The disadvantage is that it must be made larger than necessary.

In addition, since both the traveling main frame 1 and the crawler frame 4 are large welded structures,
Due to the need to reduce such sliding resistance, the connecting portion 2
Alternatively, a gap S is provided between 2' and the fitting portion 5 or 5'. However, in reality, managing this gap S is not only complicated, but there is no machining reference plane, making it difficult to machine sloped surfaces.Moreover, the cost is quite high due to the increase in such troublesome processes. There is.

Furthermore, the gap S mentioned above is due to manufacturing tolerances.
= 5 to 10 mm is required as a minimum, but if this gap S is made too large, more play than necessary will occur between the crawler frame 4 and the main traveling frame 1. As a result, when both crawler frames 4, 4 are expanded outward to ensure a large maximum distance L between falling supports during work,
The same drawback as shown in FIG. 3 occurs in that the outer side of the crawler frame 4 lifts upward due to the load applied to the main traveling frame 1.

The present invention has been developed in view of the drawbacks of the prior art described above, and it is possible to reliably support the load applied to the main frame for traveling by the inner and outer flanges of the lower roller, and to ensure that the load applied to the main frame for traveling is supported only by the inner flange of the lower roller. This not only prevents the phenomenon of uneven loads being applied and the shortening of the distance between the maximum overturning supports, but also eliminates the sliding resistance between the crawler frame and the main travel frame, and is easy to manufacture. It is an object of the present invention to provide a crawler-type traveling body that is made to be wetted.

In order to achieve the above object, the present invention adopts a main frame for traveling which has rectangular connecting portions protruding from both sides, and a main frame for traveling that has rectangular connecting portions protruding from both sides;
It has a square hole-shaped fitting part consisting of the bottom surface, left side, and right side.
A pair of crawler frames are disposed so as to be slidable in the width direction on both sides of the traveling main frame via the fitting portions, and a pair of crawler frames are attached to each of the crawler frames between a drive wheel and an idler wheel. , a crawler-type traveling body consisting of a track link guided by a lower roller, the fitting part has a width smaller from the inside of the lower surface than the width of the top surface, and the fitting part has a width on the inside of the top surface of the fitting part. forms a tapered surface, and a wedge-shaped shim is removably attached between the upper surface of the connecting portion and the tapered surface formed on the upper surface of the fitting portion, and when the crawler frame is moved outward, the lower roller It is characterized by being able to receive loads on both flange treads.

With this configuration, the crawler frame is widened during work, a wedge-shaped shim is applied to the top surface of the connecting part, and the wedge-shaped shim is press-fitted toward the tapered surface formed on the top surface of the fitting part, and then fixed as appropriate. By doing so, even if the crawler frame is widened during work, the load can be received by both flange tread surfaces of the lower roller. In addition, since the width of the lower surface of the fitting portion is shorter than the width of the upper surface, the resistance when expanding or contracting the crawler frame to the transport limit width and the working width can be reduced. I can do it.

Examples of the present invention are shown below in Figures 6 to 11.
This will be explained based on the diagram. Note that the same components as those in the prior art are given the same reference numerals, and the description thereof will be omitted.

However, in the present invention, the upper and lower surfaces 2A and 2B of the connecting portion 2 of the main traveling frame 1 are horizontal and parallel, similar to those shown in FIGS. 1 to 3.

On the other hand, reference numeral 11 in the figure is a cylindrical fitting part provided on the crawler frame 4, into which the tip of the connecting part 2 of the traveling main frame 1 is inserted and supported.
As shown in the figure, a top plate 11A and a pair of side plates 11
The upper surface of the upper plate 11A and the lower surface of the bottom plate 11C are horizontal and parallel, and the side plates 11B are also parallel to each other. Further, as shown in FIG. 6, the inside of the bottom plate 11C can support the connecting part 2,
In addition, the width l ₁ of the top plate 11A is shorter than the width l ₂ of the bottom plate 11C so as to have the minimum dimension N allowable in terms of surface pressure strength. In addition, the side plate 11B,
The lower part of the main traveling frame 1 side of the side plate 11B is also cut out as shown by the dotted line in FIG. 6, and each side plate 11B has a lower half width of _l2 and an upper half of the width _l1.
It is becoming. Furthermore, the inner surface of the upper plate 11A is a tapered surface 11D having a taper angle θ.

Next, 12 indicates the upper surface 2A of the connecting portion 2 and the fitting portion 11.
The wedge-shaped shim 12 is attached between the tapered surface 12A having a taper angle θ so as to fit into the tapered surface 11D of the fitting portion 11, and the upper surface 2A of the connecting portion 2. A wedge portion consisting of a horizontal sliding contact surface 12B that comes into sliding contact, and a mounting portion 12C that is connected to the wedge portion and has three elongated bolt insertion holes 13 drilled in the longitudinal direction of the connecting portion 2. It is configured. The wedge-shaped shim 12 configured in this manner is configured such that a bolt 15 is inserted into the elongated bolt insertion hole 13 and the three screw holes 14 formed in the upper surface 2A of the connecting portion 2, and the bolt 15 is inserted through the flat seat 16. By tightening the bolt 15, the wedge-shaped shim 12 is removably fixed to the upper surface 2A of the connecting portion 2. In the figure, 17 is a reinforcing plate attached to the upper inner side of the fitting part 11.

The present invention is constructed as described above, and its operation will now be explained.

First, the telescopic cylinder 9 is extended to widen the working width W ₂ of the crawler frame 4 during work, and each crawler frame 4 is moved outward with respect to the main traveling frame 1.

Next, with the bolt 15 loosened, the wedge-shaped shim 12
is attached to the upper surface 2A of the connecting part 2, the wedge-shaped shim 12 is moved toward the crawler frame 4, and the tapered surface 12A of the wedge-shaped shim 12 is inserted between the fitting part 11 and the connecting part 2 along the tapered surface 11D. Press fit. As shown in FIG. 6, the wedge-shaped shim 1 is placed in a state where the upper surface of the crawler frame 4 or the upper plate 11A of the fitting portion 11 is approximately parallel to the upper surface 2A of the connecting portion 2.
2 with bolts 15, the wedge-shaped shim 12 is positioned and fixed. At this time, the width dimension l ₂ of the bottom plate 11C of the fitting part 11 is larger than that of the upper plate 11.
Since it is shorter than the width dimension _l1 of A, when the wedge-shaped shim 12 is press-fitted, the fitting part 11 can be easily tilted in the horizontal direction.

After that, the desired work is started, and in this case, a load is applied to the main frame 1 for traveling, and a lifting force is applied to the outer flange 6B of the lower roller 6 in the clockwise direction as indicated by the arrow in FIG. Even if this occurs, the lifting force can be offset by the wedge force of the wedge-shaped shim 12, and the outer flange 6B will not be separated from the track link 8. Therefore,
The load applied to the main traveling frame 1 is supported by the treads of the outer flanges 6A and 6B of the lower roller 6, which not only prevents the load from being applied to the inner flange 6A but also prevents the outer flange 6B from being applied. Since it is in contact with the ground, the maximum distance L between tipping supports can be maintained. Further, over time, wear may occur between the inside of the fitting portion 11 and the upper surface 2A of the connecting portion 2, or the connecting portion 2 may be deformed due to a load, etc., and the outer flange 6B of the lower roller 6 may be lifted upward. Such a phenomenon may occur. However, in this case, the above-mentioned phenomenon can be solved by press-fitting the wedge-shaped shim 12 more deeply, but in this case, the bottom plate 11C of the fitting part 11 is connected with the minimum dimension N that is allowable in terms of strength. Since the fitting part 11 is only in contact with the part 2, the fitting part 11 can be rotated by a large angle by press-fitting the wedge-shaped shim 12, and the outer flange 6B of the lower roller 6 can be supported by the track link 8.

On the other hand, when the work is completed and the vehicle is to be loaded onto a trailer or the like for transportation, the telescopic cylinder 9 is further extended as shown in FIG.
The crawler frame 4 is tilted counterclockwise in the figure by the amount of play around the fixed link 7 located below the telescopic cylinder 9, and the wedge-shaped shim 12
A space is created between the fitting portion 11 and the fitting portion 11 . In this case, since the width dimension l ₂ of the bottom plate 11C of the fitting part 11 is shortened, the fitting part 11 is largely inclined, and a gap is formed between its tapered surface 11D and the tapered surface 12A of the wedge-shaped shim 12. S′ occurs. Therefore,
By loosening the bolt 15 that attaches the wedge-shaped shim 12 to the upper surface 2A of the connecting portion 2, the wedge-shaped shim 12 can be removed.
By removing the frame 4 from the connecting part 2 and then shortening the telescopic cylinder 9, the crawler frame 4 can be moved inward and the transport limit width W ₁ shown in Fig. 11 can be achieved. For convenience. At this time, the upper and lower surfaces 2A, 2B of the connecting portion 2,
Since the inner surfaces of the upper and lower plates 11A and 11C of the fitting portion 11 are formed parallel to each other, sliding resistance can be reduced when the crawler frame 4 is moved inward.

In addition, in the above-mentioned embodiment, the width dimension l ₂ of the bottom plate 11C
is shorter than the width dimension l ₁ of the upper plate 11A, and
Although it has been described that a notch is formed in the middle of each side plate 11B and the lower width dimension of each side plate 11B is shortened, no notch is formed in each side plate 11B,
The entire structure may be formed to have the same width as the top plate 11A; in short, only the width of the bottom plate 11C may be shortened. Further, the tapered surface 1 of the fitting portion 11
Of course, each taper angle θ of the tapered surface 12A of the wedge-shaped shim 12 and the tapered shim 12 can be selected to have an arbitrary angle.

The crawler type traveling body according to the present invention is as described in detail above, and the fitting portion of the crawler frame is formed such that the inner width of the lower surface thereof is shorter than the width of the upper surface. A tapered surface is formed on the inner inner surface of the top surface, and a wedge-shaped shim is removably attached between the top surface of the connection part of the main traveling frame and the top surface of the fitting part. It has the effect of

Between the upper surface of the connecting portion and the upper surface of the fitting portion, it is sufficient to press-fit a wedge-shaped shim into the tapered surface formed in the fitting portion. Since the wedge-shaped shim is formed shorter than the shim, the fitting portion can be easily tilted at a large angle when press-fitting the wedge-shaped shim, which simplifies the press-fitting operation.

Even though the wedge-shaped shim has been adjusted to receive the load on the inner and outer tread surfaces of the lower roller, if the load is applied unevenly to the inner flange of the lower roller, press the wedge-shaped shim deeper. By simply doing this, the inner and outer flange treads of the lower roller can be adjusted to receive the load again, making the adjustment work easier.

When removing the wedge-shaped shim at the end of the work, by making the width of the crawler frame wider than the width at the time of work, a space can be secured between the tapered surface of the fitting part and the wedge-shaped shim, making it easy to remove the wedge-shaped shim. can be done. At this time, since the width of the lower surface of the fitting part is formed shorter than the width of the upper surface, the crawler frame can be tilted at a large angle by simply widening the width of the crawler frame slightly. Work efficiency when removing shims can be improved.

Since the fitting part and the connecting part are formed parallel to each other, and the width of the lower surface of the fitting part is shorter than the width of the upper surface, even when the crawler frame is moved by the telescopic cylinder, The sliding resistance between the crawler frame and the traveling main frame can be reduced, and therefore the capacity of the telescopic cylinder can be reduced to an appropriate value.

[Brief explanation of the drawing]

Figures 1 to 5 show the prior art, Figure 1 is a plan view of a crawler type traveling body, Figure 2 is a sectional view taken in the - arrow direction of Figure 1, and Figure 3 explains the drawbacks of the prior art. FIG. 4 and FIG. 5 are cross-sectional views at the same position as FIG. 2 showing other prior art, respectively.
6 to 11 relate to the present invention, FIG. 6 is a sectional view at the same position as FIG. 2, FIG. 7 is a sectional view in the direction of the − arrow in FIG. 6, and FIG. Plan view,
Figure 9 is a sectional view in the - arrow direction of Figure 8;
The figure is an explanatory diagram showing a state in which the wedge-shaped shim is removed from the main frame for traveling, and FIG. 11 is an explanatory diagram showing the state at the time of transportation. 1...Main frame for traveling, 2...Connection part, 4...
...Crawler frame, 6...Lower roller, 8...
Track link, 9...Telescopic cylinder, 11...
Fitting portion, 12...wedge-shaped shim.

Claims (1)

[Scope of utility model registration request] A main frame for traveling with square connecting parts protruding from both sides, and a square hole-shaped fitting part consisting of upper and lower surfaces and left and right sides so that the connecting parts fit into each other, and the fitting part A pair of crawler frames are disposed so as to be slidable in the width direction on both sides of the main running frame through In a crawler-type traveling body comprising a guided track link, the fitting part has a width smaller from the inside of the lower surface than the width of the upper surface, and a tapered surface is formed on the inner inner surface of the upper surface of the fitting part. A wedge-shaped shim is removably attached between the upper surface of the connecting portion and the tapered surface formed on the upper surface of the fitting portion, so that when the crawler frame is moved outward, both flange treads of the lower roller A crawler-type traveling body characterized by being configured to be able to receive a load.