JP3308406B2 - Elastic crawler derailment prevention structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for preventing an elastic crawler used in a traveling device such as a transport machine, an agricultural machine, a construction and civil engineering machine, a snow blower, and the like, from coming off.

[0002]

2. Description of the Related Art A crawler of this kind is disclosed in Japanese Patent Application Laid-Open No. 61-10 / 1986.
As disclosed in Japanese Patent Publication No. 5277 (shown in FIG. 6), a pair of left and right derailment prevention projections 42 project from the inner peripheral surface of the endless belt-shaped crawler body 41 made of an elastic material at intervals in the circumferential direction. The middle of the left and right wheel-release preventing projections 42 is a rolling surface 43 through which the drive wheel passes, and both outer sides of the left and right wheel-release preventing projections 42 are the rolling surfaces 44 of the mating wheel 3, outside the rolling surface 44 and A flexure prevention band 45 is provided corresponding to a circumferential middle of the wheel release prevention protrusion 42.

[0003]

In the above-mentioned prior art, the bending prevention band 45 also helps to prevent derailing. However, when the vehicle turns, runs on a slope, or rides on a stone, the vehicle body and the vehicle are prevented from bending. A relative left-right force acts between the crawler and the crawler, which may cause the crawler to be displaced or twisted. There is. Such an effect is large when the rolling wheel passes through the intermediate portion in the circumferential direction of the derailing prevention projection, and the rolling surface 4
It is difficult to prevent the wheel on the outer side of the belt 4 from riding on the wheel-off prevention protrusion 42, that is, to prevent the wheel from moving toward the center in the left-right direction of the crawler.

[0004] Further, since the bending prevention band 45 has a gentle slope on the rolling surface 44 side, it is difficult to prevent the rolling wheel from moving outward in the left-right direction of the crawler. These phenomena are remarkable in a rubber track without a cored bar. According to the present invention, the crawler is provided with a slippage prevention auxiliary projection facing the rolling surface between the slippage prevention projections in the circumferential direction.
It is an object of the present invention to provide a structure for preventing a wheel from coming off the protrusion for preventing the wheel from coming off even if the wheel is twisted.

[0005]

A specific means for solving the problem in the present invention is to form a rolling surface 13 through which a mating wheel 3 passes on the inner peripheral surface of an endless belt-shaped crawler body 5 made of an elastic material. The crawler body 5 of the elastic crawler protruding structure having protrusions 11 for regulating the position of the mating wheel 3 in the left-right direction along the rolling surface 13 is projected at intervals in the circumferential direction. On the inner peripheral surface of each of the projections 11 is located between each of the derailing prevention protrusions 11 in the circumferential direction and substantially along the rolling surface 13.
The feature is that a detachment prevention auxiliary projection 16 facing the inner side surface of the tag wheel 3 is provided.

A second specific means for solving the problem in the present invention is that, in addition to the first specific means, the crawler body 5 is located on the inner peripheral surface of the crawler body 5 between the derailing prevention projections 11. A second wheel-release prevention auxiliary protrusion 17 is provided opposite to the wheel-release prevention auxiliary protrusion 16 with the rolling surface 13 interposed therebetween. The third specific means for solving the problem in the present invention is the following.
Or, the height H4 of 17 is set to 2 of the height H2 of the derailment prevention protrusion 11.
0 to 80%.

A fourth specific means for solving the problem in the present invention is that, in addition to the first or second specific means, the surface on the rolling surface 13 side of the derailment prevention auxiliary projection 16 or 17 is substantially vertical. That is, it is formed on the surface. Fifth specific means for solving the problems in the present invention, in addition to the first specific means, provided the right and left separate wheels stride track roller 3 rolling on the rolling surfaces 13, each drive wheel independently to is that you have to be movable up and down.

[0008]

When the direction of the elastic crawler 1 changes direction, when traveling on a slope, or when climbing on a stone, the wheels 3 such as matagi wheels are relatively displaced in the left-right direction of the crawler body 5,
The wheels 3 abut against the derailing prevention projections 11 to prevent derailing. When the wheel 3 is located between the derailing prevention projections 11 in the circumferential direction, the derailing prevention function of the derailing prevention projection 11 is reduced, and the inner derailing prevention auxiliary projection 16 is replaced with the derailing prevention projection 11. Wheel 3 is prevented from slipping off
Prevent you from getting on one.

Further, an outer wheel-release prevention auxiliary projection 17 facing the wheel-release prevention auxiliary projection 16 also prevents the wheel 3 from shifting in place of the wheel-release prevention projection 11, and engages with the wheel 3 particularly when traveling on a slope. To prevent relative lateral movement. The surfaces on the rolling surface 13 side of the wheel-release preventing auxiliary projections 16 and 17 are substantially vertical surfaces and securely engage with the wheel 3 to prevent relative movement. The pair of left and right wheels 3 can move up and down independently of each other. When the crawler body 5 is vertically inclined on an inclined ground or the like, the wheels 3 do not separate from the rolling surface 13 even on the valley side of the crawler body 5. The guides of the wheel removal prevention protrusion 11 and the wheel removal prevention auxiliary protrusions 16 and 17 are received.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 4, reference numeral 1 denotes an elastic crawler used for a traveling device such as an agricultural machine, which is wound around wheels 3 such as a driving wheel, a driven wheel, and a rolling wheel. The wheel 3 represents a mating wheel, and a medium wheel may be used in some cases. The elastic crawler 1 includes an endless belt-like crawler body 5 made of an elastic material.
Inside, a metal core 6 is embedded at regular intervals in the circumferential direction, and a pair of left and right circumferential tensile members 7 are embedded on the outer peripheral side of the metal core 6. At the center of the crawler body 5 in the left-right (width) direction, an engagement hole 8 is formed between the cores 6 in the circumferential direction for engaging the drive wheels.

A lug 9 is integrally formed on the outer peripheral surface of the elastic crawler 1 at a predetermined interval in the circumferential direction so as to correspond to the cored bar 6 or to be displaced in the circumferential direction. The wheel prevention projections 11 are formed so as to project at equal intervals in the circumferential direction. The derailing prevention projection 11 has a tapered tip and is formed by the projection 6A of the cored bar 6, but may be formed integrally with the elastic crawler 1 using the same material as the elastic crawler 1 such as rubber. On the inner peripheral surface of the elastic crawler 1, the middle of the left and right wheel removal preventing projections 11 is a rolling surface 12 through which the driving wheel and the middle rolling wheel pass, and both outer sides of the left and right wheel removal preventing projections 11 are mating wheels 3. Is a rolling surface 13 through which the air flows.

Left and right wheel release prevention projections 11 for the mating wheel 3
The outer circumference of the inner side surface facing the outer peripheral surface of the elastic crawler 3 is formed in a flat surface, and the base of the derailment prevention projection 11 facing the outer peripheral surface of the mating wheel 3 is a surface perpendicular or nearly perpendicular to the inner peripheral surface of the elastic crawler 1. That is, it is formed on the substantially vertical surface 11A, and the substantially vertical surface 11A faces in parallel with the outer periphery of the flat side surface of the mating wheel 3. Each of the wheel-release preventing protrusions 11 has a truncated quadrangular pyramid shape whose front end side is tapered from the substantially vertical surface 11A. It is preferable that the height H1 of the substantially vertical surface 11A of each of the wheel-release preventing protrusions 11 is generally larger than one-fifth and smaller than one-half of the total height H2 of the wheel-release preventing protrusions 11.

The inner peripheral surface of the crawler body 5 is located at an intermediate position in the circumferential direction of the derailment preventing protrusion 11 and faces the rolling surface 13 of the left and right mating wheels 3 and is opposed to the mating wheel 3 inside thereof. An inner derailing prevention auxiliary projection (first derailing prevention auxiliary projection) 16 having a substantially vertical surface 16A formed thereon is provided. The inner peripheral surface of the crawler main body 5 corresponds to the intermediate position in the circumferential direction of the dewheeling prevention protrusion 11 and faces the rolling surface 13 of the left and right ratchet wheel 3 and faces the outside of the mating wheel 3 outside. Substantially vertical surface 17A
The outer derailing prevention auxiliary projections (second derailing prevention auxiliary projections) 17 formed with.

The auxiliary protrusions 16 and 17 for preventing derailing are formed on a substantially vertical surface (a right angle or a surface close to a right angle) 16A or 17A, or a whole thereof, with a rigidity of a metal, a hard resin or the like, and a low coefficient of friction. It is preferable to be formed of a material. The height H4 of the wheel-release preventing auxiliary protrusions 16 and 17 is substantially equal to the wheel-release preventing protrusion 1.
1 of the total height H2 is greater than one-fifth and less than half (20
８０80%), which is set to be equal to or lower than the height H1 of the substantially vertical surface 11A. The auxiliary protrusions 16 and 1 for preventing wheel removal
When the crawler body 7 is formed too large, the bending rigidity becomes too high when the crawler body 5 is wound around the driving wheel, and even if soil or sand enters between the derailing prevention projections 11, it becomes difficult to discharge it. Become. It is formed relatively small so as not to cause such a case.

The auxiliary protrusions 16 and 17 are sufficiently smaller than the auxiliary protrusions 11 and are formed in a square shape as shown in FIG. 3 or in a front view as shown in FIG. It is formed in a triangle or the like, and is also formed in a quadrangle or a triangle in plan view. However, they may be formed in other shapes. The outer-wheel-release prevention auxiliary protrusion 17 faces the inner-wheel-release prevention auxiliary protrusion 16 with the rolling surface 13 interposed therebetween, but may be shifted in the crawler circumferential direction. In addition, both the wheel release prevention auxiliary projections 16 and 17 may be slightly separated from the rolling surface 13 to the left and right.

As shown in FIG. 4, the auxiliary protrusions 16 prevent the elastic crawler 1 from laterally distorting or twisting when turning, when traveling on a slope, or when riding on a stone. Then, it engages with the inner side surface of the mating wheel 3 at the circumferentially intermediate position of the wheel removal preventing projection 11 to positively prevent the mating wheel 3 from relatively shifting in the left-right direction. 3 is prevented from getting on the derailment prevention projection 11,
The outer wheel slip prevention auxiliary projections 17 are engaged with the outer surface of the mating wheel 3 to positively prevent the mating wheel 3 from relatively shifting in the left-right direction.

A plurality of pairs of the mating wheels 3 are provided in a front-rear direction of a left-right separated type.
Is connected to the lower end of the The upper portion of the support 21 is supported by a crawler support frame 22 so as to be vertically movable, and is repelled by a damper means 23. Thereby, each mating wheel 3 moves up and down independently, and can follow the crawler body 5 even if it moves up and down. The left and right mating wheels 3 are rolled in a staggered arrangement while being circumferentially shifted on the rolling surface 13 of the crawler body 5, but may be at the same position, and the damper means 23 is exemplified by a spring. , An air damper or a hydraulic damper.

The present invention is not limited to the above embodiment, but can be variously modified. For example, the elastic crawler 1 may be a rubber crawler in which a core metal is not embedded in the crawler main body 5, and a row of derailing prevention protrusions 11 is arranged only at the center in the left-right direction of the crawler main body 5, and the left and right rolling surfaces 1 are provided.
3 can also be applied to those in which the wheels 3 roll, such as driving wheels and mating wheels.

[0019]

According to the present invention described in detail above, even if a lateral displacement or twisting occurs between the wheel and the crawler body between the circumferential wheel derailing prevention projections, the wheel derailment prevention auxiliary projections are provided. Can prevent this, and can surely prevent the wheel from climbing onto the derailment prevention projection. Also, wheels tilted swash location traveling etc. deviates from the first derailing prevention auxiliary projections between derailing prevention protrusion, the second
The auxiliary protrusion for preventing wheel separation engages with the wheel to prevent lateral displacement between the wheel and the crawler body.

Further, it soil enters between derailing prevention protrusion with suppressing the increase in the bending stiffness of the crawler body, the discharge of sand capable. Further , the wheel-release prevention auxiliary projection can be reliably engaged with the wheel, and the wheel can be more reliably prevented from wheel-release. Furthermore, even if vertical motion crawler body in inclined oblique areas such as wheel can follow it, it can be more reliably prevented derailing.

[Brief description of the drawings]

FIG. 1 is a sectional front view showing an embodiment of the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is an enlarged sectional view of the main part.

FIG. 4 is a plan view showing an operation state.

FIG. 5 is an enlarged cross-sectional view of a main part showing a modified example of a wheel release prevention auxiliary projection.

FIG. 6 is a sectional front view of a main part showing a conventional technique.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Elastic crawler 3 Wheel (Matagi rolling wheel) 5 Crawler main body 11 Derailing prevention projection 11A Substantially vertical surface 12 Rolling surface 13 Rolling surface 16 Inner derailing prevention auxiliary projection (first derailment prevention auxiliary projection) 17 Outer derailment Prevention auxiliary projection (second derailment prevention auxiliary projection)

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B62D 55/08 B62D 55/253

Claims (5)

(57) [Claims] A rolling surface (13) through which a mating wheel (3) passes is formed on an inner peripheral surface of an endless belt-shaped crawler body (5) made of an elastic material, and the rolling surface (13) is formed along the rolling surface (13). Matagi
In the structure for preventing the wheel from being removed from the elastic crawler, which has protrusions (11) for restricting the position of the rolling wheel (3) in the left-right direction spaced apart in the circumferential direction, the inner peripheral surface of the crawler body (5) Is located between each of the derailing prevention protrusions (11) in the circumferential direction and substantially along the rolling surface (13).
And an auxiliary claw preventing protrusion (16) facing the inner surface of the mating wheel (3) . 2. An inner peripheral surface of the crawler main body (5), which is located between each of the derailing prevention projections (11) and sandwiches a rolling surface (13) between the derailing prevention auxiliary projections (16). 2. The structure for preventing the elastic crawler from being released according to claim 1, further comprising a second auxiliary protrusion for preventing the wheel from being released. 3. The derailing prevention auxiliary projection (16) or (1).
The height (H4) of 7) is changed to the height (H ) of the derailment prevention protrusion (11).
The structure for preventing the elastic crawler from falling off according to claim 1 or 2, wherein 20 to 80% of (2) is set. 4. The derailing prevention auxiliary projection (16) or (1).
The structure for preventing the elastic crawler from falling off according to claim 1 or 2, wherein the surface on the rolling surface (13) side of (7) is formed to be substantially vertical. 5. A crossover rolling rolling said rolling surface (13)
Derailing prevention structure of an elastic crawler according to claim 1, wheels provided horizontally separated, characterized in that it is vertically movable independently of each car wheel wheel (3).