JPS6328067Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an elastic track for vehicles such as agricultural combines and harvesters, and more specifically, the invention relates to an elastic crawler track for vehicles such as agricultural combines and harvesters, and more specifically, the invention relates to an elastic crawler track for vehicles such as agricultural combines and harvesters. Regarding the improvement of elastic tracks for use in vehicles.

In general, an elastic crawler track has wing parts extending on both sides of the central part of the main body in which a core metal and a tensile member are buried, forming an elastic band body, and a predetermined area on the ground contact side (inner peripheral surface side) of this elastic band body. It is constructed by integrally molding lugs at intervals,
When driving through wet fields, the lugs are dug into the mud to provide traction, and the elastic bands catch the mud to create buoyancy.

It is known that such elastic tracks can exert greater traction force on soft ground such as wet fields when the lug height is high.

Therefore, in the past, as shown in Japanese Patent Publication No. 57-16030, an invention has been made in which both wing parts are made one step higher than the center part, and the height of the lower wing lug part is increased.

However, the wing section is relatively flexible as there is no embedded core metal, etc., and it is a part where the weight of the aircraft easily escapes, and it is difficult to fully exert the shearing action with the road surface. If the area from the rising part to the wing tip is approximately horizontal, the wing tip will be elastically deformed to escape from the ground contact surface due to ground resistance, making it easier for soil under the wing to escape toward both sides, making the lugs higher. It is difficult to expect an effective increase in traction force, and as this escaped soil bulges up on both sides of the track, running resistance increases and it becomes difficult to mow. It becomes an obstacle to work. Also, if the wetland has a lot of moisture, it will provide sufficient buoyancy, but the lugs will scratch the muddy water and may not be able to provide sufficient traction. Therefore, muddy water,
In particular, it is required to improve drainage performance by removing water outward.

In view of these problems, the present invention corrects excessive buoyancy and provides sufficient traction by forming outward-sloping openings in the wings and expelling muddy water outward from these openings. In addition,
By forming both wing sections into a mountain-shaped cross section, lowering the lug height at the tip of the wing and maximizing the lug height near the center, soil escape is reduced and the lower wing lug is raised. The purpose of this track is to provide an elastic crawler track that effectively increases the traction force due to the In an elastic crawler track in which lugs are provided at predetermined intervals in the longitudinal direction of the band on the outer circumferential side of the band, a core metal is embedded in the central part of the main body, and a tensile material surrounding the core metal is embedded. At least one of the wings is formed with one or more openings between the lugs, sloping outward toward the inner circumferential surface for outward drainage, and each wing has a lug maximum height near the central portion. The point is that it is formed into a mountain-shaped cross section to form a section.

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes an elastic crawler belt as a wet field crawler, which is hung around a drive sprocket 2, a driven sprocket 3, and a rolling wheel 4.

In the first embodiment shown in FIGS. 2 to 4, the elastic crawler track 1A has an endless belt-shaped main body 5 made of rubber or other equally effective elastic material.
has a central portion 6 and wing portions 7 extending on both sides thereof in the width direction.

A large number of core metals 8 are embedded in the central portion 6 at predetermined intervals in the longitudinal direction of the band, and a tensile material 9 such as a steel cord is embedded around the core metal 8 to provide a highly rigid part. It is becoming. In addition, in the center of the central portion 6, a drive sprocket 2 is installed between each core bar 8.
An engagement hole 10 is formed in which the teeth engage, and on both sides of this engagement hole 10 are formed an arcuate recess 11 with which the outer peripheral surface of the drive sprocket 2 comes into contact, and a protrusion 12 for preventing wheel slippage. has been done. Reference numeral 13 denotes a guide protrusion formed by the embedded core metal 8, which protrudes toward the inner circumferential surface of the central portion 6.

Each wing portion 7 extends from the side edge of the central portion 6 to the outer circumferential surface 1.
9 (ground plane), i.e., the inner circumferential surface 18
It rises in an inclined manner to the side and outward in the width direction, and then,
It is bent into a dogleg shape and slopes down toward the outer circumferential surface 19 and outward in the width direction to form a wing tip. Therefore, from the inner end 7a where the bending starts to the wing tip 7b where the bending ends, the cross section has a mountain shape projecting toward the inner circumferential surface 18, and the position near the central portion 6 in the middle is the most protruding position 7c. be. The wall becomes gradually thinner from the most protruding position 7c to the wing tip 7b, and the vicinity of the wing tip 7c has a ground plane parallel to the ground.

Reference numeral 14 indicates openings for discharging water and mud, which are formed in each wing portion 7 at intervals in the longitudinal direction of the band. The opening 14 is circular and, as is clear from FIGS. 2 and 3, is inclined outward toward the inner circumferential surface 18. That is,
The axis α of the opening 14 is inclined outward in the width direction by an angle θ with respect to the perpendicular β of the elastic crawler track 1, and the air is discharged from below (outer circumference side) to above (inner circumference side) the wing portion 7. The muddy water, especially water, can be discharged further outward, thereby preventing muddy water from accumulating on the inner peripheral surface side of the elastic crawler track 1.

The opening 14 may be inclined outwardly with respect to the wing 7; however, in the embodiment, since the wing 7 is inclined outward at an angle greater than a right angle to the perpendicular β, the opening 14 is inclined outwardly relative to the wing 7. Even if it is perpendicular to part 7,
It is inclined with respect to the perpendicular β. Further, the wing portion 7
Since the inner circumferential surface 18 is inclined outwardly and toward the outer circumferential surface 19, the accumulation of muddy water is reduced.

The angle θ of the opening 14 is within 30 degrees, preferably 5 to 10 degrees, and the area is set to be approximately 5 mm or more in radius and less than half of the inter-lug wing portion (described later), and is a straight hole or an inner hole. It does not matter whether the small-diameter tapered hole is formed on the peripheral surface 18 side.

A traction lug 15 is integrally provided on the outer peripheral surface side of the belt-shaped main body 5 having the central portion 6 and both wing portions 7 at a position corresponding to the core bar 8 . This rug 15
is a constant height at the lower central lug portion 15a of the central portion 6, but is at a constant height at the lower wing lug portion 15a below each wing portion 7.
In b, it follows the chevron shape of the wing portion 7 and has the maximum height (H) at the most protruding position 7c. This maximum height (H)
The highest height portion 15c formed with is located near the central portion 6 having high rigidity. Each of the lugs 15 and the central portion 6
The portion of the wing section 7 separated by is the inter-lug wing section.

The lugs 15 are formed every other time over the entire width of the belt-like main body 5, and the lugs between them are formed from near both ends of the central portion 6 to the wing tips 7b of each wing portion 7, and are not formed at the center of the central portion 6. Not yet. Said wing part 7
By forming the wing to have a mountain-shaped cross section, the average height of the lower wing lug portion 15b is higher than the height of the center lug portion 15a.

When the elastic crawler track 1 touches the ground in a wet field, the belt-shaped main body 5 and the lugs 15 take in muddy soil, and when there is a lot of water, the muddy water is squeezed and discharged to the outside of the inner peripheral surface from the opening 14. The wing section 7 tries to deform upward in response to ground resistance, but this deformation is extremely difficult due to the discharge of muddy water and the downward slope from the most protruding position 7c to the wing tip 7b. Less and lug maximum height part 15
Since c is located closer to the highly rigid central portion 6, the lower wing lug portion 15b exerts a substantially increased tractive force, and since the wing portion 7 is mountain-shaped, it can take in mud. It is possible to reduce the amount of air escaping to the outside and increase buoyancy and traction force.

In the elastic crawler belt 1A, the lug 15 gradually becomes thicker from the ground contact side to the belt-shaped main body 5, so that the width in the longitudinal direction of the belt becomes maximum at the lug maximum height portion 15c, increasing the lug strength and increasing the traction force. I'm sure.

In the second embodiment shown in FIGS. 5 and 6, this elastic crawler belt 1B differs from the first embodiment in the belt-like main body 5 and lug pattern.

The wing portion 7 has an inclined flat plate shape with uniform wall thickness from the most protruding position 7c to the wing tip 7b to improve soil drainage, and every other lug 15 has a full width, and the lugs in between are short. The short lugs are approximately equal to the length in the width direction of the core bar 8, and every other lug does not have a lower wing lug portion, but instead has an opening 14 for drainage. ing.

Therefore, the opening 14 is formed larger than that of the first embodiment, and has an area less than half of the wing section separated by the two underwing lug sections 15b.

In the third embodiment shown in FIG. 7, the opening 14 of the elastic crawler belt 1 has a rectangular shape. As in each of the above embodiments, the area of the opening 14 is an area that can remove muddy water, that is, an area equivalent to a circle with a radius of 5 mm or more, and an area that does not impair the function of the wing section 7, that is, an area that is less than half of the wing section between the lugs. be. If the area of the openings 14 is too large, the ground pressure will increase, excessive soil will be discharged, and the strength of the wing portions 7 will decrease. In addition, opening 1
The cross-sectional shape across 4 is the same as that in FIG.

FIG. 8 shows a comparative example, in which the wing portion 7 of this elastic crawler track 1D tapers toward the outer end, and is inclined so that the inner and outer peripheral surfaces 18 and 19 approach each other, and the outer peripheral surface 19 In addition to improving drainage performance by slanting outward and upward, an opening 14 is formed to further improve drainage performance. However, since the wing portion 7 does not have a chevron-shaped cross section, the traction force is poor, and since the soil bulges on the sides of the crawler track is large, running resistance and turning resistance are also large.

In the fourth embodiment shown in FIGS. 9 and 10, this elastic crawler belt 1E has a horizontal portion formed at the most protruding position 7c of the wing portion 7. Therefore, the wing portion 7 has a cross-sectional shape of a substantially trapezoidal mountain, and is formed to more strongly prevent the wing tip 7b from escaping upward due to ground resistance.

Opening 1 formed in the wing section 7 of this fourth embodiment
4 is formed with a rectangular thin film 17 that is inclined outward and has cuts 16, and when it touches the ground, the thin film 17 deforms to open the cuts 16, and the muddy water is directed toward the inner peripheral surface of the crawler track 1. The buoyant force exerted on the crawler track 1 is not excessive.

In addition, in the present invention, the lug 15 can have various patterns such as a horizontal single letter, a diagonal pattern, and a staggered pattern. One or more small holes may be formed between the lugs 15, or a required number of small holes may be formed between every plural lugs 15. Further, a tensile material may be embedded in the blade tip 7b of the wing portion 7 in each embodiment to increase the rigidity of the blade tip 7b and further reduce upward escape. Furthermore, the present invention can be constructed by appropriately combining the parts of the respective embodiments described above.

According to the present invention described in detail above, at least one of the wing parts 7 is formed with one or more outwardly inclined openings 14 between the lugs 15, so that muddy water on the road surface cover is removed when the ground is touched down. The mud is removed outwardly through the inner circumferential surface of the crawler track, excessive buoyancy is corrected, the road surface is compacted, the lug 15 can reliably catch mud and exert sufficient traction force, and the muddy water on the inner circumferential surface of the crawler track is removed. There is less accumulation of water, and drainage and soil removal performance are improved.

Furthermore, both wing parts 7 are formed in a cross-sectional mountain shape with the highest height near the center part 6, and the lower wing lug part 15b has a lug maximum height part 15c near the center part 6, and the lower wing lug part 15b has a lug maximum height part 15c near the center part 6, and the lower wing lug part 15b has a lug maximum height part 15c near the center part 6. Lug maximum height part 1
Since the lugs are lower than 5c, the wing tip 7b
Since the soil is difficult to escape upward and the soil is caught between the wing section 7 and the lug 15 and does not escape, it is possible to effectively increase the traction force by making the lower wing lug section 15b higher than the center lug section 15a. Since there is no dirt piled up on the sides, running resistance is low and turning is easy.

In addition, since the upward relief of the wing section 7 in which the opening section 14 is formed is small, the muddy water removal effect from the opening section 14 is not impaired, and this is combined with the fact that the wing section 7 has a mountain-shaped cross section. , the traction force can be increased significantly.

[Brief explanation of the drawing]

Fig. 1 is a side view of a crawler device to which the present invention is applied, Figs. 2 to 4 show a first embodiment of the invention, Fig. 2 is a cross-sectional view, and Fig. 3 is an arrow shown in Fig. 2. A perspective view, Figure 4 is a sectional view taken along the - line in Figure 3, and Figures 5 and 6.
The figures show the second embodiment, FIG. 5 is a cross-sectional view, FIG. 6 is a view taken in the direction of the arrow in FIG. 5, FIG. 7 is a bottom view showing the third embodiment, and FIG. 8 is a comparative example. FIGS. 9 and 10 show the fourth embodiment, FIG. 9 is a cross-sectional view, and FIG. 10 is a view taken in the direction of the arrow in FIG. DESCRIPTION OF SYMBOLS 1... Elastic crawler track, 5... Band-shaped main body, 6... Center portion, 7... Wing part, 8... Core metal, 14... Opening, 15... Lug, 15a... Center lug part, 15
b... Wing lower lug, α... Axis line, β... Perpendicular line, θ
...Inclination angle.

Claims (1)

[Scope of utility model registration request] Lugs 15 are provided at predetermined intervals in the band longitudinal direction on the outer peripheral surface side of an endless elastic band having a main body central portion 6 and both wing portions 7 extending on both sides thereof, and a core bar 8 is provided within the main body central portion 6. In the elastic crawler track in which a tensile material 9 is embedded and which surrounds the core bar 8, a lug 1 is provided in at least one of the wing parts 7.
One or more openings 14 are formed between the openings 14 slanting outward toward the inner circumferential surface to drain water outwardly;
Each wing section 7 has a lug maximum height section 1 near the center section 6.
An elastic crawler track characterized in that it is formed in a mountain-shaped cross section to form a 5c.