JPS6312063Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an elastic track that is attached to a work vehicle such as a combine harvester or a binder.

As shown in FIG. 14, a conventional elastic crawler track 1 of this type has lugs 4 protruding from the outer circumferential surface 3 of a rubber body 2, and reinforcing bodies 5 such as a circumferential cord layer inside the lugs 4 at regular intervals. A reinforcing material 6 in the width direction such as a metal core is buried therein, and a part of the metal core or rubber material is made to protrude from the inner circumferential surface 7 side to form two protrusions 8 for preventing derailment.

In this crawler track 1, the track for the wheel 10 is formed on the outside of the protrusion 8, and there is no protrusion on the outside of the wheel track, so if the running ground 9 is sloped or raised,
The derailment prevention protrusion 8 of the crawler track 1 may become far away from the wheel 10 and lose its anti-derailment function, resulting in the derailment.

In view of these conventional problems, the present invention forms inner and outer protrusions on both sides of the center line of the crawler track, sandwiching the wheel track, and forms the outer protrusions 15 in a tapered shape and a trapezoidal cross section. An object of the present invention is to provide an elastic crawler track that can more reliably prevent derailment in both left and right directions with small protrusions.

The features of the present invention to achieve this purpose are that core metals A are buried at regular intervals in the circumferential direction, and wheel engaging holes 13 are provided on the center line CL in the width direction and between each core metal A. , an elastic crawler track in which lugs 4 are formed on the outer circumferential surface 3 and protrusions for preventing derailment are formed on the inner circumferential surface 7 at positions corresponding to the core metal, and the protrusions are arranged on the left and right sides of the center line CL, sandwiching the wheel track 17, respectively. inner protrusion 1
4 and an outer protrusion 15, the inner and outer protrusions 14,
15 is formed by a protrusion B of the core metal A.

In addition, the material of the rubber body in this invention is natural rubber, urethane rubber, synthetic polyisoprene rubber,
Conventionally known materials such as polyptadiene rubber, reinforcing agents, fillers, softeners, tackifiers, rubber vulcanizing agents,
Vulcanization accelerator etc. are added. The circumferential reinforcing body is a so-called tensile means that generates resistance against tension by the wheel, and is usually made of steel cords or fiber cords, but it may also be one in which short fibers are mixed and oriented in the circumferential direction. In addition, the fibers used for the reinforcement include polyamide fibers, rayon, polyester fibers, cotton, wool,
Organic fibers such as polyolefin fibers and inorganic fibers such as glass fibers, carbon fibers, rock wool, and asbestos can be used, and these may be treated with, for example, RFL adhesives, isocyanates, or epoxy resin adhesives, or treated with formalin-generated adhesives. It is preferable to mix the resin or isocyanate for adhesion treatment.

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

1 to 6 show a first embodiment of the present invention, and FIG. 1 shows a state in which the elastic crawler track 1 of the present invention is attached to a support body 11 of a working vehicle, and 10a is a drive unit made of a sprocket. Wheel, 10b is driven wheel, 10c
is a guide wheel, and a crawler belt 1 is wrapped around all the wheels 10.

The crawler track 1 has lugs 4 integrally protruding from the outer peripheral surface 3 of an endless annular rubber body 2 at predetermined intervals.
A reinforcing body 5 is embedded in the circumferential direction, and this reinforcing body 5 has a wheel engaging hole 1 on the center line CL.
There is one layer on each side of 3 in between. A1
is a core bar embedded in the rubber body 2, forming a widthwise reinforcing member, and located between the wheel engagement holes 13 corresponding to the lugs 4. Further, on the inner circumferential surface 7 corresponding to the core metal A1, inner and outer protrusions 14 and 15 are protruded on the left and right sides of the center line CL, respectively. That is, the lug 4, the core metal A, and the four inner and outer protrusions 14L, 1
4R, 15L, and 15R are formed at the same position in the circumferential direction.

As shown in FIG. 4, the lug 4 has a straight portion 4a in the width direction and two orthogonal portions 4 perpendicular to the straight portion 4a.
b, and has a shape that can obtain sufficient traction force and at the same time prevent skidding and vibration.

As is clear from FIGS. 2, 3, and 5, the protrusions 14 and 15 are symmetrical with respect to the center line CL,
The left and right inner and outer protrusions 14 and 15 are tapered and have a substantially trapezoidal cross section, and are set to a minimum size that allows relative tilting with the wheel 10 while preventing the wheel from coming off. It has a highly rigid shape, and on the outside of the outer protrusion 15, a standing wall-shaped reinforcing part 16 is protruded on the inner circumferential surface 7, and this reinforcing part 16 is integrally molded with the rubber body 2 and the outer protrusion 15. has been done.

Between the inner protrusion 14 and the outer protrusion 15 is a wheel track 17 on which the guide wheel 10c rolls, and the outer surface 1 of the inner protrusion 14 facing this track 17
The angle 14θ of 4a is the inner surface 15 of the outer protrusion 15.
The slope is steeper than the angle 15θ of a.
As a result, the width of the root portion of the inner protrusion 14 is narrowed. Further, the height 14H of the inner protrusion 14 is formed higher than the height 15H of the outer protrusion 15.

The core metal A1 is formed by bending both ends of a band plate in a dogleg shape in the circumferential direction, and both ends of the core bar A1 are formed by bending both ends of a band plate into a dogleg shape in the circumferential direction.
It is embedded in the rubber of the outer protrusion 15 and forms a part of the outer protrusion 15. That is, the core metal A1 of the first embodiment forms left and right outer protrusions 15L and 15R. As shown in FIG. 7, this modification includes the central portion 19
A conceivable core metal A1' is that the upper surface of the central portion 19 is at the same height as the raceway 17.

8 to 12 show other embodiments of the present invention based on deformation of the metal core.

In the second embodiment shown in FIG. 8, the core metal A2 has a protrusion B1 for forming the left inner protrusion 14L and a protrusion B2 for forming the right outer protrusion 15R.
A central shoulder part 20 is extended from the center shoulder part 20, and this core metal A2 is arranged in the circumferential direction of the crawler track 1 at every other core metal buried position, and the reversely oriented core metal A2 is placed between them, and all the protrusions are Every other core protrusion B1 or B in the circumferential direction
2 is located.

In the third embodiment shown in FIG. 9, the core metal A3 has a protrusion B1 for forming the right inner protrusion 14R and a protrusion B2 for forming the left outer protrusion 15L.
The central shoulder portion 20 extending from the left medial projection 14L
It is formed up to the root of the left inner projection 14L, and is formed to further increase the rigidity of the left inner projection 14L. These core metals A3 are also arranged in opposite directions every other core metal in the circumferential direction.

The core metal A4 of the fourth embodiment shown in FIG.
and a central shoulder portion 20 between both protrusions B1, B1, and the core metal A5 of the fifth embodiment shown in FIG.
2, B2 and a central shoulder portion 20, the core metal A6 of the sixth embodiment shown in FIG. B2, B2 and protrusions B1, B1
and a central shoulder 20 between them.

In addition to using the same core metals A1, A2, A3, A4, and A5 for one crawler track 1, the core metals A1 and A4 may be used for the core metal A2 and the core metal A5 for each of the core metals A2 and A4.
3 may be used by alternately combining the core metal A4 and the core metal A5, respectively, or the core metal A6 may be arranged in the arrangement of these combinations.

The protrusion B of each core metal A is an inner and outer protrusion 14, 15.
Although it is buried in the rubber forming the inner and outer projections 14 and 15, a part or all of it may be exposed on the surfaces of the inner and outer projections 14 and 15. In addition, core metal A is core metal A1, A1'
As is clear from the above, it is sufficient that the inner circumferential surface 7 side is formed in a predetermined manner, and the core metals A2, A3, A4, A5, and A6 can be similarly formed from sheet metal.

Next, the operation of each part of the present invention will be explained based mainly on FIG. 13.

The protrusions 14 and 15, which are formed two on each side with the center line CL as a border, are located on both sides of the wheel track 17, so even if the wheel 10 is tilted to the left or right, at least one of the inner and outer protrusions on the left and right 14,15
The core metal A, which is placed in correspondence with all the protrusions 14 and 15, improves the durability of the protrusions 14 and 15, and the inner and outer protrusions 14 . The rigidity of the side parts is increased to enable more uniform ground contact over the entire width of the crawler track 1, thereby improving slope running performance and wet field performance.

In the inner and outer projections 14 and 15,
The outer surface 14a of the inner protrusion 14 is steeply sloped to narrow the distance D between the left and right wheel tracks 17, thereby increasing the wheel distance E.
By making it possible to shorten the height, it is possible to reduce the floating of the lower wheel on a slope, thereby more reliably preventing wheel derailment.

In addition, when the inner surface 15a of the outer protrusion 15 is steeply sloped by increasing the inclination angle 15θ, the distance F between the tip of the protrusion and the outer circumference of the wheel 10 becomes smaller, and when the distance F becomes less than zero, the distance F is reduced. It is circular, but the angle of inclination is 1
Since 5θ is made small and the slope is gentle, derailment can be prevented.

Further, since the inner and outer protrusions 14 and 15 have a height 14H of the inner protrusion 14 higher than a height 15H of the outer protrusion 15, the wheel 10 is caught on the inner protrusion 14 when the vehicle is tilted, and derailment is reliably prevented. . It should be noted that there are almost no slopes where the wheels come off the inner protrusion 14. Conversely, since the outer protrusion 15 is low, the crawler track 1
When it is assembled into the support body 11, it becomes easy to assemble it.

According to the present invention described in detail above, the crawler track 1 has a pair of left and right outer protrusions 15 for preventing derailment, which are formed on the inner circumferential surface 7 on the outer side of the inner protrusion 14 and are lower than the inner protrusion 14 across the wheel track 17. Because of this, it is possible to more reliably prevent derailment on both the left and right sides than when only the inner protrusion 15 is used.Moreover, the outer protrusion 15 does not interfere with the installation of the crawler track 1, and conversely, the height 14 of the inner protrusion 14
Since H is set higher than the height 15H of the outer protrusion 15, the wheel 10 is caught on the inner protrusion 14 when tilting, and derailment is reliably prevented.Furthermore, the left and right outer protrusions 15 are tapered and have a roughly pedestal cross section. Since it is formed into a shape, it can be set to a smaller size that allows relative tilting with the wheel 10 and prevents the wheel from coming off, and even if it is small, it can have high rigidity, and thus the intended function can be achieved without increasing the amount of material. It can be maximized while keeping it to a minimum.

[Brief description of the drawings]

Figures 1 to 6 show the first embodiment of the present invention, with Figure 1 being a side view in use, Figure 2 being a cross-sectional perspective view, and Figure 3 being a plan view from the inner circumference side. 4 is a plan view as seen from the outer circumferential surface side, FIG. 5 is a sectional view taken along the line -- in FIG. 3, FIG. 6 is a partially sectional side view, and FIG. A sectional view showing a modified example,
8 to 12 are cross-sectional views showing the second to sixth embodiments of the present invention, FIG. 13 is a cross-sectional explanatory view showing the function of each part of the crawler track, and FIG. 14 is a conventional crawler track. It is a cross-sectional explanatory view. DESCRIPTION OF SYMBOLS 1...Elastic crawler track, 2...Rubber body, 3...Outer circumferential surface, 4...Lug, 7...Inner circumferential surface, 10...Wheel, 13...Wheel engagement hole, 14...Inner protrusion, 1
4a...outer surface, 15...outer projection, 15a...
Inner surface, 17...Wheel track, H...Height, θ...
Inclination angle, A...Core, B...Protrusion, CL...Center line.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) Core metals A are buried at regular intervals in the circumferential direction, and one wheel engagement hole is provided between each core metal A on the center point CL in the width direction.
3, and lugs 4 are provided on the outer peripheral surface 3 at regular intervals in the circumferential direction.
In the elastic crawler track, in which inner protrusions 14 for preventing derailment are formed at positions corresponding to the core metal on the inner circumferential surface 7 and on the left and right sides of the center line CL, the inner circumferential surface 7 has a wheel track on the outside of the inner and outer protrusions 14. Left and right 1 lower than the inner protrusion 14 across 17
An elastic crawler track characterized in that a pair of outer protrusions 15 for preventing derailment are formed, and the left and right outer protrusions 15 are tapered and have a substantially trapezoidal cross section. (2) The outer surface 14a of the inner protrusion 14 is the outer protrusion 15
The elastic crawler track according to claim 1, which is characterized in that the elastic crawler track is steeply sloped from the inner surface 15a of the belt. (3) The elastic crawler track according to claim 1, wherein at least one of the left and right outer protrusions 15 is formed by a protruding portion of the core metal A.