JPS5822775A - Elastic endless track crawler - Google Patents

Abstract

PURPOSE:To obtain an entirely high towing force by strengthening the lug part of a crawler at the outside from the other lug part, thereby preventing the escape of the outside lug part. CONSTITUTION:The ground contacting surface 1c of a lug 1 is a low recess at the center and high recesses at the outsides, a body load to be applied in a direction P through rolls is affected to the lug 1a at the outside, is bent toward a direction of an arrow R, and is affected to the center 1b of the lug. The elastic recovery force of the outside lug part 1a of this case enhances the ground contacting force, thereby performing the effect of sidewisely pushing the mud clay filled between the lugs and since the ground contacting surface side of the crawler is bent toward the inside by the deformation of the lugs, it has the effect of exhausting the mud clay. Accordingly, the towing force of the side edge can be increased.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an elastic endless track belt (hereinafter referred to as a crawler) mounted on an agricultural vehicle such as a combine harvester or a snowmobile.

Generally, the above-mentioned crawler has lugs formed at appropriate intervals on the outer circumferential surface of the crawler in order to provide traction force. This lug can sufficiently support the load weight of the vehicle body applied through the wheels in the width direction of the crawler and exhibit its traction performance, but in the outer part, the load is applied to the area where the load is applied. Because it is separated from the crawler and has no support from the inner circumferential side of the crawler, it tends to warp and escape to the inner circumferential side of the four crawlers in response to the reaction force from the ground, and it is difficult to obtain the same traction force as the central part. is difficult to expect.

In particular, the above tendency is noticeable in the lug portions located outward from the embedded core bar, since the lug portions are made of only elastic bodies.

SUMMARY OF THE INVENTION It is an object of the present invention to construct the crawler in such a way that a high traction force can also be obtained from the outer lug portions, and thus a higher overall traction force is provided.

According to the present invention, the above object is achieved by increasing the lug height by making the lug portion on the outer side of the crawler protrude more toward the ground surface than the other lug portions. Since the ground contact surface of the lug is low in the center and high on the outside, the vehicle body load received at the center of the lug is first applied to the outer lug, and then elastic deformation of the lug occurs and then the load is applied to the center of the lug. However, the elastic restoring force of the lugs increases the ground pressure on the outer lug parts, which has the effect of pushing out the mud stuck between the lugs to the side, and also causes the crawler to deform due to the deformation of the lugs. Since the contact surface side bends inward, it has the effect of increasing the mud discharge effect, thereby increasing the traction force at the side edges. In addition, since the outer lug portion is bent more toward the inner circumference of the crawler, the side edge of the crawler becomes higher, making it difficult for foreign substances such as mud and stones to enter the inner circumferential surface of the crawler. By increasing the ground pressure of the crawler, it is difficult for sideslip to occur even when running on slopes, and stable running is achieved.Furthermore, since lug wear progresses from the outer part, the center part of the standard height is protected and the crawler Effects such as longer life can be obtained. According to a preferred embodiment of the invention, raised lug portions project from the sides of the crawler in the form of fins. This configuration is particularly effective when driving in muddy areas such as wet fields, and even if mud gets clogged between the lugs, the mud can be drained well between the fins, and the fins scrape the mud to maintain traction. This action is combined with the above-mentioned traction-enhancing action of the outer lug portion to provide high traction in muddy areas. In that case, it is preferable that the raised lug portion be located on the outer side of the embedded core metal.

By doing so, it is possible to increase the mud-scraping surface of the fin-like portion and to bring about the desired traction force imparting effect. In another embodiment, the lugs are alternately made long and short, or every other lugs are shortened on one side of the crawler. According to this, a discharge effect due to high ground pressure can be obtained in the part where the lug pitch is wide, and the side edge The effect of promoting the fluidity of mud is brought about by the warping of the parts. In addition, by making the height of the lugs on the side of the crawler relatively high,
It is possible to increase the traction force and improve running performance in wet fields.

The present invention will be explained in more detail below with reference to embodiments shown in the accompanying drawings.

FIG. 1 is a perspective view of a part of the crawler of the present invention viewed from the ground surface side, and in FIG. The outer portions 1a of the lugs protrude more toward the ground surface than the central lugs 1b, and the height of the lugs is increased by α as shown in FIG. The value of α is appropriately selected depending on the weight of the vehicle body, etc., but in practice, approximately 5 to 3o 1IIiE *especially around 20 fights is appropriate. In Figure 1, 2 indicates core metals buried at predetermined intervals in the circumferential direction inside the crawler, and 3 indicates core metals 2.
This is a tensile reinforcing material such as a wire cord buried on the outer periphery of the

In particular, as is clear from Fig. 2, the contact surface IC of lug 1 is low at the center and has a concave shape that is high at the outside. The rear lug central portion 1b is bent in the direction of arrow R by the reaction from the ground.
affected. At this time, the elastic restoring force of the outer lug portion 1a increases the ground pressure, thereby exerting the effect of pushing out the mud stuck between the lugs to the side, and the deformation of the lugs causes the crawler's contact surface side to move inward. The traction force on the side edges can be increased by bending to the side, which has the effect of increasing the mud discharge effect.

3 and 4 show another embodiment of the present invention, in which raised outer lug portions 1a protrude from the sides of the crawler to form fin-like portions. This fin-like portion can be formed by cutting out the portion between the lugs on the side of the crawler. A crawler provided with such a fin-shaped part is particularly suitable for traveling in muddy areas such as wet fields.When traveling in muddy areas, mud easily gets clogged between the central lug parts 1b and is difficult to remove. However, the mud that has entered between the fins 1a is easily removed, and the side surfaces of the fins scrape the mud to provide crawler traction. This traction force imparting effect is combined with the traction force exerting effect by the overhanging portion of the outer lug portion to exert a large traction force when driving in muddy areas.

As shown in FIG. 4, the above-mentioned overhanging portion is provided outside the side end of the core bar 2, thereby increasing the side surface area of the fin-shaped portion for scraping mud and increasing the ground pressure. I can do it. Note that although Drawing 9 shows a case in which the projecting portion is inclined so as to gradually increase in height toward the outside, it may have a uniform height or may have a different height. It may have a shape.

5-16 show variations of the embodiment shown in FIGS. 3 and 4.

Figures 5 to 7 show the case where the fin-like portion is provided only on one side of the crawler, and in that case, the lug height of the lug portion 1a on the outer side of the surface may be increased as shown in Figure 6. However, it may be made only on one side.

In the case of the crawler shown in FIG. 7, this is so that the side on which the fin-like portions are provided is placed inside the vehicle body when the crawler is mounted on the vehicle body. Note that 4 in Figure 2 is a sprocket hole.

Figures 8 to 10 show a fin-like part provided only on one side of the crawler,
The other side shows a case where the pitch interval is partially widened by shortening the length of every other lug, thereby improving soil removal performance. In other words, the central part is easily clogged with mud, but la
On the sides, the wide lug pitch allows mud to escape, which has the effect of scraping new mud, and the higher the lug height is, the more effective the traction force is, so the synergistic effect improves running performance in wet fields.

Figures 11 to 13 show the fin-like portion 1a only on one side of the crawler.
By shortening the intermediate lugs 5 every other time, the earth removal performance from between the fin-shaped parts is improved, and the pitch interval is partially widened in the lug part on the opposite side to similarly improve the soil removal performance. This shows the case where

14-16 are for the example of FIGS. 11-13.

Fig. 16 shows a case in which every other fin-like part 1a is provided on both sides of the crawler, and Fig. 16 shows a modified example in which a projecting part is provided only on one fin-like part 1a to increase the lug height as before. It is.

When the height of the connecting portion 1a is increased, FIG. 19 shows the case only on one side. Particularly in the case of FIG. 19, if the side having 1a is attached to the outside of the fuselage, the traction force will be greater on the outside, and the turning performance will be improved.

Figures 20 to 22 show a case where the entire ground contact surface 1G of the lug 1 is inclined in the lateral direction of the crawler to provide a lug portion 1a that is raised outwardly, and Figures 20 and 21 alternately show the lug portion 1a. When the inclination directions are reversed, FIG. 22 shows an example of a variation in which the contact surfaces IC of all the lugs are inclined in the same direction.

Figures 23 to 25 show the case in which every other lug is shortened to increase the lug pinch spacing at the front portions of both ends of the shortened lug to improve earth removal performance. Figure 25 shows the case where the height of the shortened lug is increased. This is an example in which the height of the lug is slightly higher than that of the central portion 1b of the other lugs to maintain balance with the lug portion 1a and to prevent vibrations from occurring when the wheels pass.

Figures 26 to 28 show a crawler in which the lengths of the lugs are alternately shortened on the outer sides thereof to increase the pitch interval of the lugs in the side portions of the crawler, thereby improving soil removal performance. In that case, the lug portion 1a may be formed by sloping the ground plane as shown in FIG. 28.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a part of the crawler according to the present invention, seen from the ground plane side. FIG. 2 is a cross-sectional view taken along the l-n line in FIG. 1. FIG. 3 is a perspective view similar to FIG. 1 of another embodiment. FIG. 4 is a sectional view taken along line IV-IV in FIG. 3. FIG. 5 is a ground plane side plan view showing a variation of the embodiment shown in FIG. 3. FIG. 6 is a sectional view taken along line IV-IV in FIG. 5. FIG. 7 is a sectional view similar to FIG. 6 showing a variation. FIG. 8 is a ground plane side plan view showing another variation. FIG. 9 is a sectional view taken along line IX-IX in FIG. 8. FIG. 10 is a sectional view similar to FIG. 9 showing a variation. FIG. 11 is a ground plane side plan view showing still another variation. FIG. 12 is a sectional view taken along the line Xl+-■ in FIG. 11. FIG. 13 is a sectional view similar to FIG. 12 showing a variation. FIG. 14 is a ground plane side plan view showing still another variation. FIG. 15 is a sectional view taken along the line XV-XV in FIG. 14. FIG. 16 is a sectional view similar to FIG. 15 showing a variation. FIG. 17 is a ground plane side plan view showing a variation of the embodiment shown in FIG. 1. FIG. 18 is a sectional view taken along the line xvm-xvm in FIG. 17. FIG. 19 is a sectional view similar to FIG. 18 showing a variation. FIG. 20 is a ground plane side plan view showing another variation. FIG. 21 is a sectional view taken along line XXI-XXI in FIG. 20. FIG. 22 is a sectional view similar to FIG. 21 showing a variation. FIG. 23 is a ground plane side plan view showing still another variation. FIG. 24 is a sectional view taken along line XXIV-xxIv in FIG. 23. FIG. 25 is a sectional view similar to FIG. 24 showing a variation. FIG. 26 is a ground plane side plan view showing still another variation. FIG. 27 is a sectional view taken along the line xxvn-XAl in FIG. 26. FIG. 28 is a sectional view similar to FIG. 27 showing a variation. 1... Lug, la... Raised lug portion on the outside of the crawler, 2... Core metal patent applicant Brideston Tire Co., Ltd. - Figure 25 Atsushi Figure 27

Claims (1)

[Claims] (/lIn an elastic endless track belt formed by forming lugs for applying traction force at intervals on the outer circumferential surface. The lug portions on the outer side of the track belt have a higher ground contact surface than the other lug portions. An elastic endless track belt characterized by extending to the side and increasing the height of the lugs. (2. In the elastic endless track belt according to claim 1, the raised lug portions are An elastic endless track band that protrudes from the side and serves as a fin-like part. (3) In the elastic endless track band according to claim 2, the raised lug portion is located on the outer side of the embedded core metal. An elastic endless track belt.