JPH04252784A - Rubber crawler - Google Patents

Abstract

PURPOSE:To reduce vibration to a machine body in a rubber crawler utilized in a civil engineering machine and the like by providing of roller running bodies which are formed in one body with a core, exposed on the inner circumferential face of the rubber crawler, and drawn in the lengthwise direction, and overlapping in order the front and rear ends of roller running bodies of the adjoining core bars in the thickness direction of the rubber crawler. CONSTITUTION:Cores 12 are embedded at their both wing parts 13 in a rubber elastic body 11 constituting a rubber crawler and arranged side by side. A roller running body 14 formed into one body with the core 12 and projected on the inner circumferential face of the rubber crawler, is drawn longer than the width W of the core 12, equally formed to be drawn long on one side against the core 12, and the long drawn extreme end 15 of the running body 14 is overlapped on the rear end 16 of the running body 14 of same shape formed on the core 12 positioned adjacent to this. In this running body 14, the extreme end 15 is overlapped in order on the rear end 16 of the adjoining running body 14, and it is continued. An engaging hole 17 for a sprocket is formed between the adjoining cores 12, 12 on the center in the direction of the rubber crawler.

Description

Description: FIELD OF INDUSTRIAL APPLICATION [0001] The present invention relates to the structure of a rubber crawler, and more particularly to a rubber crawler used for running construction machines and civil engineering work machines. [0002] Conventionally, rubber crawlers have been mainly used in agricultural machinery such as combines and harvesters, but in recent years, iron shoe crawlers have been used in construction machinery and civil engineering machines. It has come to be used as a replacement. Rubber crawlers used in such construction machinery, etc. differ greatly from rubber crawlers used in agricultural machinery in the running position of the wheels that support the machine body, and the running position of the wheels that support the machine body is different from that of rubber crawlers used in agricultural machinery. It has a structure that runs on the tip of the protrusion. FIG. 11 shows a side view of this type of traveling device. In the diagram, 1 is a sprocket, 2 is an idler
, 3 are rolling wheels, and endless rubber tracks are attached to these wheels.
La4 is rolled up. Tension is applied to this by a tension mechanism that supports the idler 2, and the sprocket 1 transmits the driving force transmitted from the transmission to the rubber crawler 4. On the other hand, FIG. 12 is a cross-sectional view of the rubber crawler 4 used here, and as shown in the figure, core metals 6 are arranged in strips and embedded in a rubber elastic body 5 at right angles to the endless direction. has been done. A pair of protrusions 7, 7 are formed on the core metal 6 so as to protrude from the inner surface of the rubber crawler, and the rolling wheels 3 run on the top surfaces of these protrusions 7, 7. In the figure, 8 is a lug formed on the outer peripheral side of the rubber crawler, and 9 is an endless steel cord (tensile member) surrounding the core bar 6. Now, FIG. 13 shows a partial side view of a general rubber crawler, and the tip of the protrusion 7 extending from the core bar 6 is narrower than the width of the core bar 6; When the wheel 3 is run on the tip of the adjacent protrusion 7,
Since the intervals between the tips of the wheels 7 are wide, the rollers 3 move up and down each time, causing large vibrations in the aircraft body and making it uncomfortable. Therefore, when used in construction machinery or the like, the protrusion 7 extending from the core metal 6 is used with its tip wider than the width of the core metal. [0006] Initially, even when using a core metal with widened protrusion tips, there was a limit to how wide the protrusions could be, and when wrapped around a sprocket or idler, the protrusion tips of adjacent core metals could come into contact with each other. Because the wheels were spaced far enough apart to prevent the wheels from moving, the running wheels still caused vertical vibrations. In order to improve this drawback, a structure has been proposed in which the tips of the protrusions 7 of adjacent core metals 6 are made long enough to overlap in the width direction of the rubber crawler, so that the rolling wheels 3 always run on the protrusions 7 one after another. There is. FIG. 14 is a partial plan view of a rubber crawler using such an improved core metal, and FIG. 15 is a side view of the rubber crawler shown in FIG. 14. The core bar 6 of the rubber crawler shown in FIGS. 14 and 15 has its protrusions 7 considerably elongated, forming a zigzag shape at one end, and the width of the rubber crawler between adjacent protrusions 7, 7. They are shaped so that they overlap in the direction. [0008] Rubber claw using this improved core metal
In this case, the vertical vibration given to the rolling wheels 3 is significantly reduced, which has a certain effect on the running of the rolling wheels 3. However,
When a rubber crawler is running or working on a machine, it is not only running on a flat road surface, but also on pebbles, sand, or mud, and it is also making sharp turns, so the rubber crawler is constantly moving up and down or when working on machinery. Locally expanded and contracted in the width direction. Therefore, especially when expansion and contraction in the width direction is severe, these core bars 6,
In some cases, the protrusions 7, 7 of 6 cannot be kept overlapping in the width direction, and in this case, the protrusions may be damaged, or the rubber crawler may come off the machine body. [0009] The present invention aims to improve the drawbacks of the conventional rubber crawler, and eliminates the vertical vibration of the rolling wheels and prevents breakage of protrusions and derailment of the rubber crawler. The present invention provides a rubber crawler which also prevents this. [0010]The present invention adopts the following configuration in order to solve the above problems. That is, core metals arranged horizontally in the form of strips at regular intervals in a band-shaped rubber elastic body;
A rubber crawler in which a tensile body formed by enclosing this core metal is embedded, and a sprocket engagement hole is formed between the core metals,
A pair of wheel running bodies are integrated with the core metal and exposed on the inner circumferential surface of the rubber crawler, and the wheel running bodies are extended vertically in the longitudinal direction of the rubber crawler and are attached to the inner circumferential surface of the rubber crawler. A rubber crawler is characterized in that two rolling wheel running tracks are formed in a straight line, and the front and rear ends of the running bodies of adjacent cored wheels overlap one another in the thickness direction of the rubber crawler. Particularly preferably, it is a rubber crawler in which a recess is formed on the surface of the running body on the ground contact side in the overlapping surface of the wheel running body of the core metal. [0011] In such a rubber crawler, even if the pair of wheel running bodies of the core metal protrude alternately in opposite directions in the width direction of the core metal, they do not extend in the same width direction of the core metal. They may protrude side by side, and in consideration of lateral slippage of the running body, it is preferable that the core metal faces the overlapping surface of the rolling wheel running body and prevents the lateral slippage of the opposing rolling wheel running body from the outside. It is preferable to form a side-slip prevention part to prevent this. Further, the wheel running body does not have all the protrusions, and may be provided separately from a pair of protrusions on the outside of a pair of protrusions protruding from the inner circumferential surface of the rubber crawler. [Operation] Since the present invention adopts the above-mentioned configuration, the running bodies of the rolling wheels extending from the core metal are overlapped in the thickness direction of the rubber crawler, so that the top and bottom of the rubber crawler and Even if a large force is applied in the width direction, this overlap will always occur, so the running surface of the rolling wheels will be secured in any case, and there will be no damage like with conventional rubber crawlers, and there will be no possibility of wheels coming off. The phenomenon was also significantly reduced. [Specific Examples] The present invention will be explained in more detail below using the drawings. FIG. 1 is a plan view showing a first embodiment of a rubber crawler according to the present invention, and FIG. 2 is an enlarged sectional view taken along line A--A in FIG. 1, especially when only the core metal is taken out. In the figure, 11 is a rubber elastic body constituting the rubber crawler, and 12 is a core bar. The core metal 12 has both wing portions 13 embedded in the rubber elastic body 11 and arranged side by side. Reference numeral 14 denotes a wheel running body that protrudes from the inner circumferential surface of a rubber crawler formed integrally with the core bar 12, and is a running body that extends longer than the width Wo of the core bar 12. Both are formed to extend long to one side with respect to the metal 12, and the leading end 15 of the long extended running body 14 is located adjacent to the core metal 121.The rear end 161 of the same-shaped running body 141 formed on the core metal 121 is located above. It overlaps with . In this traveling body 141, its leading end 151 is successively connected to the rear end 16 of the adjacent traveling body 142.
2 will overlap on top of each other, and this will be continuous. In the figure, reference numeral 17 denotes a sprocket engagement hole formed between adjacent core metals 12, 12 at the center in the width direction of the rubber crawler. The rear ends 16, 161, 162... of the running bodies 14, 1 41, 142... are the tip 1 of the running bodies 14, 141, 142...
When the wheels 5, 151, 152, etc. are overlapped, the depressions 18 are formed so that the top surface on which the wheels run is flat, thereby ensuring a running surface for the wheels. In this manner, in the rubber crawler of the present invention, the running bodies forming the running surfaces of the wheels do not overlap in the width direction of the rubber crawlers, but overlap in the thickness (up and down) direction. In addition, even if a large force is applied to the rubber crawler, particularly in the left and right width directions, this overlapping will not come undone, ensuring a reliable running surface for the wheels. FIG. 3 is a plan view of a second embodiment of the rubber crawler of the present invention. In this example, the pair of running bodies 14 have a shape in which the left and right sides of the core metal 12 extend in opposite directions, and the overlapping of the running bodies of adjacent core metals is the same as in the first embodiment. Same as in case. [0016] In the above illustrated example, the extent of elongation of the running body 14 is shown as an example in which the running body 14 protrudes to one side with respect to the width direction of the core bar 12, but the present invention is not limited to this. ,
Of course, the traveling body 14 may extend approximately equally in the front and back relative to the core metal 12. 0
FIG. 4 is a plan view of the rubber crawler shown in FIG. 3 provided with a lateral slip prevention section for preventing lateral slippage between the running bodies 14, and FIG. 5 is a plan view of the core of the rubber crawler shown in FIG. FIG. 5 is a sectional view taken along line BB in FIG. 4 regarding only gold 12; In this example, a lateral slip prevention part 19 is provided on the outside of a recess 18 formed in the rear end 16 of the running body 14, and the tip 15 of the running body 14 of the adjacent core bar 12 is provided with the depression 18.
When they are fitted into each other, the presence of the preventing portion 19 allows the relationship between the tip 15 and the recess 18 to remain in a fitted state, and no lateral displacement of the traveling body occurs. It goes without saying that this lateral slip prevention part 19 can be similarly provided for the recess 18 at the rear end of the running body of the rubber crawler core shown in FIG. [0018] The above-described lateral slip prevention part for a running body can be said to be provided on the running body on the hollow side, and prevents lateral slippage by the tip of the running body fitted therein, but is not limited to this. What is shown in FIG. 6 is a cross-sectional view of the core metal at the same position as shown in FIG. 5, with a side slip prevention part 19 provided on the outside of the tip of the traveling body with respect to the recess 18. That is, the running body 1
A side slip prevention part 19 is provided connected to the tip 15 of the core bar 14 and connected to the lower side of the outside thereof, and the rear end 16 of the adjacent core bar 14 in which the recess 18 is formed is connected to the side slip prevention part 19.
By engaging with each other, lateral slippage will not occur. Of course,
It goes without saying that such a lateral slip prevention part 19 can be applied to the tip of a running body of a rubber crawler shown in FIG. [0019] In the above example, the rubber claw is
This is applied to a rubber crawler in which the roller wheels run on the top surface of a large protrusion that protrudes toward the inner circumference of the roller.
This is a type of rubber crawler that uses the top surface as a running surface for the rollers as well as the directional control function. FIG. 7 shows a version of FIG. 6 in which the recess 18 is directed inward to form an inclination angle α, while the tip 15 of the traveling body 14 is also formed with an inclination angle β. As shown in FIG. 8, this is shaped so that the tip 15 of the running body 14 fits into the recess 18 without resistance when it is wound around a sprocket (not shown) of a rubber crawler. In this case, it is preferable that the angular difference γ between the two core metals 12, 12 adjacent to each other from the center of the sprocket and the above-mentioned α and β be approximately equal, so that the winding can be carried out extremely smoothly. That will happen. However, other forms of rubber crawlers include
Some rubber crawlers have a pair of protrusions whose primary purpose is to prevent wheels from coming off and to control the direction of the rubber crawler, and the running surface of the wheels is formed separately from the protrusions. FIG. 9 is a plan view of a third embodiment in which the present invention is applied to such a rubber crawler, and FIG. 10 is an end view taken along line CC in FIG. 9, showing only the core bar. In this example, the traveling body 20 has wing portions 23 on the outside of a pair of protrusions 22 formed on a core metal 21.
This is an example in which each of the core bars 21 extends in opposite left and right directions with respect to the width direction of the core metal 21. The tip 24 of the running body 20 is connected to the wing portion 231 of the adjacent core metal 211.
It overlaps with . In this example, a pair of running bodies 2
0 are formed so as to be alternately shifted in opposite directions in the width direction of the core metal 21, but it goes without saying that the running bodies may have the same degree of elongation in the front and rear directions in the width direction, although this is not shown. As can be seen from the figure, even in the case of the third embodiment, even when a force is applied to the rubber crawler, especially in the width direction, the overlapping does not become deviated, and a stable running surface is always maintained. It has become possible to secure this. In the above figures, what is indicated by the reference numeral 30 is the engagement portion with the sprocket teeth at the center of the metal core. [Effect] As explained above, in the rubber crawler of the present invention, since the running bodies of the rollers are sequentially overlapped in the thickness (vertical) direction of the rubber crawler, the rollers are Since a running surface can always be secured, the vibration to the aircraft body is reduced, and the core metal is not damaged and the rubber crawler does not come off, so its utility value is high.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing a first embodiment of a rubber crawler according to the present invention.

FIG. 2 is an enlarged cross-sectional view taken along line A-A in FIG. 1, particularly showing only the core metal.

FIG. 3 is a plan view of a second embodiment of the rubber crawler of the present invention.

[Fig. 4] Fig. 4 shows the side slip prevention part of the rubber claw shown in Fig. 3.
FIG.

5 is a central sectional view of only the core metal 12 in FIG. 4. FIG.

FIG. 6 is a cross-sectional view similar to FIG. 5, but with another lateral displacement prevention part 19;

FIG. 7 is a sectional view similar to FIG. 5 of the rubber crawler shown in FIG. 6;

FIG. 8 is a cross-sectional view showing the state of the rubber crawler in FIG. 7 when it is wound around the sprocket.

FIG. 9 is a plan view of a third embodiment to which the present invention is applied.

FIG. 10 is an end view taken along line BB in FIG. 9, showing only the core metal.

FIG. 11 is a side view of a general traveling device.

FIG. 12 is a sectional view of the rubber crawler used in FIG. 11.

FIG. 13 shows a partial side view of the rubber crawler shown in FIG. 11.

FIG. 14 is a plan view of a conventional improved rubber crawler.

FIG. 15 shows a partial side view of the rubber crawler shown in FIG. 14.

[Explanation of symbols]

１１‥‥Rubber elastic body 12, 21... Core metal 13, 23... Wing section 14, 20... Rolling wheel running body 15, 24... Tip of the running body 16‥‥Rear end of running body 17. Sprocket engagement hole 18‥‥dent 19. Lateral slip prevention part 22.Protrusion 30. Sprocket engagement part α‥‥Inclination angle of depression β‥‥Inclination angle of the tip of the traveling body

Claims (6)

[Claims] Claim 1: Core metals arranged horizontally in the form of strips at regular intervals in a band-shaped rubber elastic body and a tensile body surrounding the core metals are embedded, and a sprocket engagement hole is formed between the core metals. The rubber crawler is provided with a pair of wheel running bodies integral with the core bar and exposed on the inner peripheral surface of the rubber crawler, the wheel running bodies extending vertically in the longitudinal direction of the rubber crawler. In this way, two rolling wheel running tracks are formed linearly on the inner circumferential surface of the rubber crawler, and the front and rear ends of the running bodies of adjacent cored wheels are sequentially weighted in the thickness direction of the rubber crawler. A rubber crawler that is characterized by its ability to fit. 2. Claim 1, wherein in the overlapping surface of the wheel running body of the core metal, a depression is formed on the running body surface on the grounding side.
Rubber crawler as described in section. 3. The rubber crawler according to claim 1, wherein the pair of wheel running bodies of the core metal protrude alternately in opposite directions in the width direction of the core metal. 4. The rubber crawler according to claim 1, wherein the pair of wheel running bodies of the core metal protrude side by side in the same width direction of the core metal. 5. Claims 1 to 4, wherein a lateral slip prevention portion is formed facing the overlapping surface of the wheel running body of the core metal and preventing lateral slippage of the opposing wheel running body from the outside thereof. The rubber crawler described. 6. The rubber crawler according to claim 1, wherein the pair of wheel running bodies are provided outside a pair of protrusions projecting from the inner peripheral surface of the rubber crawler.