JP5103101B2 - Rubber track core and rubber track using the same - Google Patents

Description

  The present invention relates to a core bar embedded in a rubber crawler employed in a traveling part of a vehicle. More specifically, the present invention relates to a core member for a rubber crawler that can suppress damage to the rubber crawler and generation of noise.

  In recent years, rubber crawlers have been widely used in traveling parts of vehicles such as construction machines and agricultural machines from the viewpoints of road surface protection, noise suppression, and environmental protection. Among such rubber crawlers, there are those in which core bars are embedded and arranged at a predetermined pitch in the circumferential direction of the rubber crawler for reinforcement and shape retention. For example, Patent Document 1 discloses a rubber crawler in which a core metal related thereto is embedded. The core metal embedded in the rubber crawler is a flat core metal body elongated in the width direction of the rubber crawler, and each of the core bars standing in the core metal body is elongated in the width direction of the rubber crawler. And a pair of corners. The rubber crawler is provided with a bifurcated protrusion on the inner peripheral surface side by covering the front and rear direction (circumferential direction of the rubber crawler) of the pair of corners with a rubber material. For such a rubber crawler, a disc-shaped sprocket is set between the protrusions. And a driving force is transmitted to the rubber crawler side by engaging the drive pin standingly arranged in the peripheral part of the sprocket with the projection.

  In the rubber crawler having the above-described configuration, the protrusion is set long in the width direction, and the contact surface with the drive pin of the sprocket is widened. And the contact surface of the projection part is formed with the rubber material which coat | covers a metal core. Thus, since the contact surface of the protrusion is made of a rubber material, the rubber crawler can be driven while suppressing damage to the protrusion and noise even when contacting the drive pin.

JP-A-11-198871

  However, the structure of the rubber crawler disclosed in Patent Document 1 does not take into consideration the contact with the disc portion of the sprocket body or the wheel provided between the sprocket and the idler. That is, in the rubber crawler of Patent Document 1, the protrusions are protected by the rubber material in the front-rear direction (the circumferential direction of the rubber crawler) where the drive pin of the sprocket is engaged. However, since sufficient consideration is not given to the protection of the protrusions in the lateral direction (the width direction of the rubber crawler) perpendicular to the front-rear direction, there is still room for improvement in this respect.

  Accordingly, an object of the present invention is to provide a rubber crawler metal core that can more reliably suppress the occurrence of rubber crawler damage and noise, and further, by using such a rubber crawler metal core, durability can be improved. It is another object of the present invention to provide a rubber crawler with improved noise reduction.

Above object, it comprises a pair of corner portions which project alongside the core metal body a flat metal core body, a rubber crawler core metal that will be embedded in Gomukuro La, before Symbol each corner parts, rather than the crawler circumferential direction thickness is formed larger in the crawler width direction thickness, and a kite provided with the side and crawler constricted in the circumferential direction on both sides of the side portions of the crawler width direction on both sides of each corner This can be achieved by the characteristic rubber crawler mandrel.

That is, the corner portion is adopted a structure has been formed as a pair, each of which Batch on the side portion and the inner sides of the outer side portion of their corners are provided so as to form a bifurcated shape. When the corners are formed in a pair so that the corners are bifurcated, a sprocket can be received between them.

Further, the constricted portion may be formed of a concave curved surface .

In the rubber crawler are embedded rubber crawler core metal of the above-described configuration, the entire corner including the constricted portion that form a protrusion for driving coated with a rubber material is preferable. Further, in this rubber crawler, it is preferable that the constricted portion is filled with rubber material to fill the constricted portion.

Then, the thickness of the rubber material surrounding the constricted portion, to leave formed thicker than the thickness of the rubber material of the tip ambient of the corner desirable.

Rubber crawler core metal according to the present invention, each corner, the crawler circumferential direction of crawler width direction thickness than in the direction thickness is larger, the side and the crawler circumferential direction of the crawler width direction on both sides of each corner is provided with the constricted portions on both sides of the side, it is possible when embedded in the rubber crawler increases the rubber thickness of the periphery of the constricted portion. Therefore, it is possible to increase the rubber thickness in a region that may come into contact with the wheel or the sprocket, thereby improving the durability and low noise performance of the rubber crawler.

That is, the corner portion in the core metal for a rubber crawler having the above structure as a pair so as to form a bifurcated shape, is provided with the Batch been portion in each of the crawler width direction outer sides of their corners, especially the track roller becomes rubber crawler in consideration to addressing contacts, also, is provided with the Batch been portion on the side of the crawler width direction inside, a rubber crawler that special attention to addressing contact with the sprocket and idler body portions that Do not.

In addition, the provided-conclusion that portion click row La circumferential side portions, it is possible to drive pin of the sprocket and Gomukuro La considering also the protection of the parts to engage.
In addition, since the constricted portion is formed of a concave curved surface, it is possible to obtain a core bar in which the durability of the rubber crawler is further improved.

Then, it buried the rubber crawler core metal, a rubber crawler according to the present invention, by Rukoto to form a protrusion for driving cover the entire corner including the constricted portion in the rubber material, also constricted the constricted portion so as to fill the parts with Rukoto have is filled with a rubber material, it is possible to reliably improve the durability and low noise.

Hereinafter, an embodiment according to the present invention will be described in detail with reference to the drawings.
FIGS. 1A and 1B are views showing a rubber core for a rubber crawler (hereinafter simply referred to as a core) according to the embodiment, where FIG. 1A is a plan view, FIG. 1B is a front view, and FIG. It is a right view. The cored bar 1 shown in FIG. 1 is embedded and arranged at a predetermined pitch in the circumferential direction of a rubber crawler (not shown) to reinforce and support the rubber crawler. In FIG. 1A, the left-right direction corresponds to the width direction RD of the rubber crawler, and the vertical direction corresponds to the circumferential direction CD of the rubber crawler. The structure of the cored bar 1 will be described below using these directions as appropriate.

  The main body 11 of the metal core 1 is generally a rectangular plate, and is embedded in the rubber crawler with its longitudinal direction parallel to the width direction RD. A pair of corners 12, 12 are erected at a central portion of the main body 11 with a space therebetween, and the cored bar 1 is formed in a shape having bifurcated corners. The corners 12 and 12 are formed long in the width direction RD, and W1 is larger when the width direction thickness is W1 and the circumferential direction thickness is W2.

  And the narrow part 13 is provided in the outer side part of each of said pair of corner | angular part 12. As shown in FIG. The constricted portion 13 has a shape recessed (recessed) toward the center of the corner 12 from the middle of the corner to the main body 11 located at the bottom in the height direction HW. As described above, when the constricted portions are provided on both outer sides of the pair of corner portions 12, when the rubber crawler is formed by embedding the core metal 1, both of the pair of projection portions formed based on the corner portions 12. On the outside, the rubber thickness from the middle to the periphery of the root can be increased. This will be further described with reference to the drawings.

  FIG. 2 is a cross-sectional view of the rubber crawler 100 manufactured using the core metal 1. The protrusions 101 of the rubber crawler 100 are formed by covering the pair of corners 12 of the core metal 1 with rubber materials. The rubber crawler 100 is manufactured by filling the constricted portion 13 with a rubber material. Such a rubber crawler 100 can be manufactured by a process similar to the conventional one. That is, a molded rubber material is prepared in advance in which a convex portion that fills the constricted portion 13 formed in the corner portion 12 of the core metal 1 is provided in the rubber molding step. By using such a rubber material, the illustrated rubber crawler 100 in which the constricted portion 13 is filled with rubber can be manufactured.

  In the rubber crawler 100 shown in FIG. 2, the rubber thickness of the outer side of the pair of protrusions 101 and the portion below the middle is increased in the width direction RD. Therefore, even when the outer portion of the protrusion 101 comes into contact with the wheel 110 when the rubber crawler 100 is set and driven on the traveling portion of the vehicle, the impact received at that time can be reduced. Thus, if the rubber thickness of the part with which the roller wheel 110 may contact is increased, it is possible to prevent the rubber from being worn or dropped even when used for a long time. Therefore, since the opportunity which the metal core 1 and the wheel 110 contact directly can be reduced, the rubber crawler 100 can be made into a highly reliable product in which damage and noise generation are suppressed.

  The rubber crawler 100 shown in FIG. 2 illustrates the case where the protrusions 101 are formed by covering the entire corner 12 of the core 1 with a rubber material. The rubber crawler 100 has a more preferable structure because it can protect the protrusion 101 as a whole. The thickness of the rubber material around the constricted portion 13 is thicker than the thickness of the rubber material around the tip portion of the corner portion 12. Therefore, as described above, various problems due to contact with the wheel 110 can be suppressed.

(Modification)
FIG. 3 is a view showing a modification of the core 1. FIG. 3 shows a modified cored bar as in FIG. 3A is a plan view, FIG. 3B is a front view, and FIG. 3C is a right side view. Moreover, the same description is attached | subjected to the same location as the site | part shown in FIG. 1, and the overlapping description is abbreviate | omitted. The cored bar 2 shown in FIG. 3 is further provided with another constricted portion 14 on the inner side portion of both corner portions 12. The constricted portion 13 shown in FIG. 1 is formed in order to cope with the possibility that the outside of the protruding portion 101 of the rubber crawler 100 may come into contact with the wheel 110.

  However, in the case of the rubber crawler 100 having the bifurcated projection 101 shown in FIG. 2, the disc-shaped sprocket 120 is received between the projections 101 and driven by rotating the sprocket 100. Therefore, there is a possibility that the sprocket 120 and the idler (not shown) may come into contact with the inner portion of the protrusion 101, and thus the same problem as in the case of the above-described rolling wheel 110 may occur. The cored bar 2 of the present modification has a structure that also copes with this point. That is, since the second constricted portion 14 is formed on the core metal 2 shown in FIG. 3, the rubber thickness below the middle of the protrusion 101 of the rubber crawler 100 is increased. Therefore, the core metal 2 has a more preferable structure that can cope with not only the rolling wheel 110 but also a problem caused by contact with the sprocket 120 and the idler.

  There are various modes for rotationally driving the rubber crawler with the sprocket. However, in the case of the rubber crawler 100 and the sprocket 120 shown in FIG. In the case of the illustrated sprocket 120, the drive pin 121 is erected so as to protrude from the surface of the sprocket body to both sides. The drive pin 121 is substantially parallel to the width direction RD of the rubber crawler 100. Then, when the drive pin 121 engages (contacts) the corner portion 12, the rotational force of the sprocket 120 is transmitted to the rubber crawler 100. Since this operation is continuously repeated, it is easy to wear the rubber material covering the corner portion 12.

  Therefore, in the core metal 2 of the above-described modification, as shown in FIG. 3C, it is more preferable to further provide a third constricted portion 15 on the front and rear surfaces of the corner portion 12 facing the circumferential direction CD of the rubber crawler. preferable. Thereby, it can be set as the metal core which further improved the durability of a rubber crawler.

  In the rubber crawler metal cores 1 and 2 described above, a pair of corners 12 standing on the metal core body 11 are elongated in the width direction RD of the rubber crawler. 14 is provided, it is possible to increase the rubber thickness around these constricted portions when embedded in the rubber crawler 100. Therefore, it is possible to increase the rubber thickness of a portion that may come into contact with the wheel or the sprocket, thereby improving the durability and low noise performance of the rubber crawler 100.

  Although the preferred embodiments of the present invention have been described in detail above, the present invention is not limited to the specific embodiments, and various modifications and changes can be made within the scope of the gist of the present invention described in the claims. It can be changed.

  As is apparent from the above description, according to the present invention, a metal core that improves the durability and low noise performance of the rubber crawler can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS It is the figure shown about the core metal for rubber | gum crawler which concerns on one Embodiment of this invention, (a) is a top view, (b) is a front view, (c) is a right view. It is sectional drawing of the rubber crawler manufactured using the metal core. It is the figure shown about the modification of a metal core, (a) is a top view, (b) is a front view, (c) is a right view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 2 Core metal 11 Core metal body 12 Corner | angular part 13 Constriction part 14 Constriction part 15 Constriction part 100 Rubber crawler 101 Protrusion part 120 Sprocket CD Circumferential direction of rubber crawler RD Width direction of rubber crawler

Claims (5)

Comprises a pair of corner portions which project alongside the core metal body a flat metal core body, a rubber crawler core metal that will be embedded in Gomukuro la,
Before SL each corner, rather than the crawler circumferential direction thickness is formed larger in the crawler width direction thickness, the sides and crawler constricted in the circumferential direction on both sides of the side portions of the crawler width direction on both sides of each corner rubber crawler core metal, wherein the kite is provided. The core metal for a rubber crawler according to claim 1, wherein the constricted portion is formed of a concave curved surface. A rubber crawler in which the core for rubber crawler according to claim 1 or 2 is embedded ,
Rubber crawler, wherein the entire corner, including the constricted portion that form a protrusion for driving covered with a rubber material, it. And said constricted portion is filled with a rubber material so as to fill the constricted portion, and wherein the rubber crawler of claim 3. The thickness of the rubber material surrounding the constricted portion, is formed thicker than the thickness of the rubber material of the tip ambient of the corner, it is characterized, rubber crawler according to claim 3 or 4.

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