JPH0127503Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an elastic endless track belt (hereinafter referred to as crawler) used in agricultural vehicles such as binder combines, and is particularly applicable to muddy areas such as wet fields. This makes it suitable for driving at high speeds.

[Prior art]

Generally, crawlers used in muddy areas have a relatively hard lugs called plowing plate (subsoil) at the bottom of the wetland that causes the ground surface to sink into the wetland. It is preferable for the lug to reach the ground level in order to increase the propulsion force, but if the height of this lug is too large, it will cause severe vibration to the aircraft during normal road running, and in addition, soil will become clogged between the lugs in wet fields. This makes it easier and reduces the lag effect.

Therefore, in order to eliminate the above-mentioned disadvantages, as shown in FIG. The one with a slit-like cut c extending to
It has been proposed as No. 80.

[Problem that the invention attempts to solve]

By the way, the crawler of this invention is designed to prevent slips by allowing the ends of the lugs a to vibrate individually between the adjacent cuts c, thereby promoting the release of the mud caught between the ends of the lugs. Furthermore, in wet fields with a lot of moisture, the cut c allows mud and water in the cultivated soil to pass through, facilitating the sinking of the crawler, while in wet fields with little moisture, when traveling on highly viscous muddy soil, the cut c allows the crawler to sink. The purpose of this is to allow only air to pass through to promote the mud compaction effect of the crawlers and to prevent the crawlers from sinking.

However, since this cut c is only formed in the shape of a slit from the width direction end of the crawler to the center between the front and rear lugs a, it is not possible to impart sufficient vibration to the lug end, which has a high degree of rigidity. Therefore, it is not possible to reliably discharge the mud caught between the lug ends.

The purpose of this invention is to increase the driving performance of such crawlers by increasing the sinking of the lugs into the wet field and by improving the mud removal effect from between the front and rear lugs, thereby increasing the propulsion force. That is.

[Means for solving the problem] That is, the present invention has lugs protruding from the contact surface at regular intervals, and core metals are horizontally arranged in the widthwise center of the interior corresponding to each of the lugs. Further, in an elastic endless track band in which a tensile reinforcing material is embedded in the circumferential direction along the outer periphery of this core metal, approximately in the middle of the front and rear lugs whose side ends reach the widthwise ends of this track band, A notch is formed from the widthwise end of the raceway band toward the center, and further a notch is provided from the inner end of the notch toward the front and back in the circumferential direction, so that the lugs can be bent. It is characterized by the formation of fin-like parts.

[Function] The elastic endless track belt of the present invention has a cut-out section approximately halfway between the front and back of each lug whose side end reaches the widthwise end of the crawler, from the widthwise end toward the center of the crawler. At the same time, a bendable fin-like portion is formed between the lugs by providing a cut from the inner end of the cut toward the front and back in the circumferential direction of the crawler. When the lugs are run, the front and rear facing fins receive the ground pressure of the mud and bend upward toward the inner surface of the crawler on the side opposite to the ground, and as a result, muddy water between the lugs flows through the cuts. By allowing the crawler to pass upward and enveloping a large amount of highly viscous mud below the fins, the crawler sinks into the mud and is enabled to run on the plowing platform. . Furthermore, the mud below the fin-like area between the lugs is widened when the crawler is wound around by the rear wheels and turned upwards, whereas the fin-like area is By bending and moving the opposing parts closer to each other, they are ejected outward under the pressing force of the fin-shaped parts.

[Effect of idea]

In this way, when the present invention is used, when driving on muddy soil such as wet rice fields, the fin-like part between the front and rear lugs bends inward from the landing surface, so that more water and air can be absorbed. The mud contained in the cultivated soil is passed upward, and a large amount of mud can be trapped under the fins, which promotes the sinking of the crawler and increases the actual height of the lug. It can improve your strength. Furthermore, the mud beneath the fins is discharged when the crawler is wrapped around the rollers, thereby preventing deterioration of the lug function and allowing the crawler to run smoothly on wet fields.

〔Example〕

Next, an embodiment of the present invention will be explained with reference to the drawings. In Figs. 1 to 3, a crawler main body 1 made of an elastic material such as rubber has a substantially triangular cross section with regular intervals in the circumferential direction along the ground contact surface. There are two types of lugs 2: long lugs 2a whose side ends reach the widthwise ends of the main body 1, and short lugs 2b whose side ends do not reach the widthwise ends of the main body 1. It shows. A pair of detachment prevention protrusions 3a are provided at the same intervals so as to correspond to the formation positions of these lugs 2, and inside the center portion 1b of the crawler body 1 excluding the width direction wing portions 1a, 1a, a pair of detachment prevention protrusions 3a are provided on the inner surface of the anti-grounding side. Core bars 3 protruding from the core bar 3 are arranged horizontally in the width direction, and a tensile reinforcing material 4 made of steel cord or the like is embedded in the circumferential direction on the outer periphery of the core bar. 5
is a sprocket hole formed in the center of the crawler body 1 between each lug.

In both wing portions 1a, 1a of the main body approximately midway between the front and rear lugs 2a, 2a whose side ends reach the width direction ends of the crawler main body 1, there is a By forming a notch 6 of an appropriate width and providing notches 7, 7 from the inner end of this notch toward the front and back in the circumferential direction of the main body 1, the flexible fin-like parts 8, 8 can be moved forward and backward relative to each other. It is formed to face the

These fin-shaped parts 8, 8 are shaped so that when the crawler body 1 sinks into the muddy soil at the time of ground contact, the cross section takes on a figure-eight shape as shown by the chain line in FIG. The fin is bent in an upward direction, and when it is rolled up by the wheel 9 and reversed as shown in FIG. It is preferable that the formation position of the fin-shaped portion be at least on the same level as the area where the core bar 3 and the tensile reinforcing member 4 face each other, or located inside the side of the crawler body 1 opposite to the ground. The thickness of the grounding side is preferably formed so that the surface of the grounding side becomes gradually thinner from the base of the lug 2 to the inner end 8'. Although it may be flat as shown in FIG. 5, it may also be formed in advance so that the inner end 8' is curved inward toward the side opposite to the ground. .

The planar width of the notch 6 varies depending on the outer diameter of the roller 9 and the thickness of the crawler body 1 from the contact surface of the roller to the tensile reinforcing material 4, but is usually 15 to 45 mm. Furthermore, the longitudinal length of the cut 7 in the circumferential direction can be freely selected until it reaches the base of the lug 2.

In FIG. 6, one side end of each lug 2 is terminated at a position before reaching the width direction end of the crawler body 1, and the fins 8, 8 are formed alternately on the left and right in the circumferential direction. This figure shows an example in which the panels are formed in a left-right staggered manner.

Furthermore, in the embodiment shown in FIGS. 7 and 8, the crawler body 1
A hollow part 10 is formed on the inner surface of the anti-grounding side corresponding to the lugs 2 of both wing parts 1a, 1a in an inclined shape so as to increase the depth toward the end in the width direction. The muddy water that tends to accumulate on the inner surface of the side opposite to the ground of the shaped parts 8, 8 is made to flow out to the outside of the width direction end part through the hollow part.

[Brief explanation of the drawing]

Fig. 1 shows an embodiment of the present invention; Fig. 2 is a plan view of a part of the crawler showing the ground plane, Fig. 2 is a side view of the same, and Fig. 3 is a sectional view taken along line A-A in Fig. 1. ,
Fig. 4 is a side view of the winding part by the roller, Fig. 5 is a side view similar to Fig. 2 showing another embodiment, Fig. 6 is a plan view showing the same aspect as Fig. 1; FIG. 7 is a side view similar to FIG. 2 showing another embodiment, FIG. 8 is a sectional view taken along line B-B in FIG. 7, and FIG. 9 is a plan view showing a part of a conventional crawler. be. 1 is an elastic track band (crawler body), 2 is a lug, 3 is a core bar, 4 is a tensile reinforcement material, 6 is a cut, 7,
7 is a cut, 8 is a fin-like part.

Claims (1)

[Scope of utility model registration request] Lugs are formed protruding from the ground surface at regular intervals, and core metals are horizontally arranged in the widthwise center of the interior in correspondence with each of the lugs, and furthermore, around the outer periphery of this core metal, tension is applied in the circumferential direction. In an elastic endless track strip in which reinforcing material is embedded, approximately midway between the front and rear lugs whose side ends reach the widthwise ends of the track strip, from the widthwise ends of the track strip toward the center. An elastic endless track belt characterized in that a notch is formed, and further, a notch is provided from the inner end of the notch toward the front and back in the circumferential direction, thereby forming a bendable fin-like portion between the lugs. .