JPS5911467B2 - endless track - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an endless crawler belt for an endless traveling drive device such as a crawler.

As is well known, in a crawler type endless belt, an endless belt made of rubber or other elastic material is made to circulate by meshing or frictionally interlocking with sprocket foils, drum foils, etc. The problem is that the attachment between the free wheel and the endless band tends to come off easily, and the wheel tends to come off easily, and the embedded core metal that has a claw for attachment to the driving wheel may be deformed or broken. There are many points.

To explain this with reference to FIG. 8, A is the endless band main body, B is the tension-maintaining cord layer, C is the embedded core metal, and the concentric metal C is the cord layer B of the endless band main body A. In the upper region, a pair of engaging claws of the core metal C are embedded at predetermined intervals in the band longitudinal direction, and protrude toward the side opposite to the ground surface.

According to the conventional example shown in FIG. 6, the driving wheel is formed by forming an engaging hole on the drum peripheral surface that engages with a pair of engaging claw pieces, or by forming a hollow hole with a row of bars that engage with the claw pieces. The idler wheel is a rolling wheel with a circumference that fits between the claw pieces as shown by the symbol E, and the idler wheel shown by the symbol F has a four-circumferential groove G that engages across the claw pieces. It has a drum shape.

Therefore, according to this example, apart from the driving wheel, the idle wheel E1
Both idle wheels F tend to come off easily, and deformation of the engaging pawl piece and breakage of the core bar C are problems, and breakage and deformation of the pawl piece lead to poor engagement with the drive wheel, which is a real problem. There is a risk that it may become impossible to drive.

Therefore, if the durability of the core metal C1, especially the nail piece, is improved, the weight becomes excessive, and since there are a plurality of core metals C, the total weight of the metal core C1 becomes large.

As a result of intensive research to eliminate the problems of the previous example, the inventor of the present invention improved the shape of the endless belt main body, and worked with the core metal to reliably prevent wheel derailment. We have succeeded in providing an endless belt that promises to reduce the weight of the belt, suppress vibrations, and also suitably prevent damage to the core metal. Therefore, in the present invention, the endless belt is grounded from the central part of the endless belt to the longitudinal direction. A central recessed portion having a gutter-shaped cross section is formed toward the side, and core metals embedded in rows at regular intervals along the longitudinal direction of the endless strip are fitted into the inner surface of the central recessed portion. a cored metal bottom wall in the central recessed part of the endless band, having a bridge-shaped recessed portion facing the core metal, and an embedded portion extending in the width direction of the endless band from a side wall of the recessed portion of the cored metal; A grounding lug is formed protrudingly on the grounding surface side of the endless band within the projection area of the core metal, and a grounding lug is formed protruding from the grounding surface side of the endless band body, and the contact surface of the grounding surface of the endless band main body and the bottom wall of the cored metal are formed in a row. It is characterized by being set approximately on the same plane as the surface of the ground.

The present invention will be described in detail below with reference to the illustrated embodiments. FIG. 1 shows an example of the use of an endless belt according to the present invention, where 1 is an endless belt, 2 is a driving wheel, 3 is an idler wheel, and 4 is an example of the use of an endless belt according to the present invention. It is an intermediate free wheel.

The endless band 1 is made of rubber or other elastic material, has lugs 5 formed on its ground surface, and has a tension-maintaining cord layer 6 embedded therein in the longitudinal direction.

The endless band 1 is provided with concave portions 7 extending in the longitudinal direction and having a gutter-shaped cross section such as a U-shape. The core bar 8 is embedded in the same direction on each rlJ member.

The concentric bar 8 has a bridge-shaped recessed part 8' formed in its center that faces the inner surface of the central recessed part 7 of the endless band 1 in a fitted manner. The inner surfaces 9', 9' of both side walls 9, 9' and the bottom wall 10 are exposed to the surface of the recessed part 7.

That is, the inner surfaces 9', 9' are the inner surfaces 7/, 7/ of the central recessed portion 7.
The bottom wall 10 is exposed on the same surface as the inner surface 7/
, 71.

The lug 5 may be divided into two parts at the lower surface of the recessed part 7, or may extend over a gold mine, but in short, each lug 5 is at least partially located within the projection area of the core metal 8 as shown in the second figure. There is.

Further, in the present invention, the core metal 8 is embedded at regular intervals in the longitudinal direction of the band, and the recessed portion 8' is located in the central recessed portion 7 of the endless band 1, and the bottom wall 10 crosses each bottom wall. 10.10
A meshing hole 11 is formed between the meshing holes 11 in the shape of a window hole, thereby forming the drive wheel 2 in the shape of a sprocket foil, and each tooth 12 formed on the sprocket, that is, the circumferential surface, is formed in the meshing hole 11.
The endless band 1 is driven by meshing with the two.

Further, the position of the bottom wall 10 of the core bar 8 is located lower toward the ground side than the cord layer 6 of the endless band 1, and the ground surface portion 10' of the bottom wall 10 is substantially lower than the cord layer 6 of the endless band 1. It is located approximately on the same plane as the ground plane 1' of the main body.

On the other hand, the other idler wheel 3 corresponding to the driving wheel 2 is provided in the central recessed part 7 of the endless band 1, with clearance between the side walls 9, 9 and the bottom wall 10 of the core metal 8 in the recessed part 7 and the recessed part 7. A central body part 13 having a size that extends to the center body part 13, and a center body part 13, which projects on both sides of the central body parts 13, 13 with a smaller diameter than the body part 13, and whose circumferential surface is attached to both shoulders of the central recessed part 7 of the endless band 1 on the ground side. It is formed from left and right side body parts 14 and 14 that are connected and supported on each top surface 15' of a pair of protrusions 15 that protrude in opposite directions, and the intermediate idler wheel 4 has exactly the same structure, except that The shape is smaller in diameter than the idler wheel.

In both shoulders of the central recessed part 7, that is, in the wheel passing part, there is a pair of protrusions 15 formed in FIGS. The recess depth of the central recess 7 of the endless band 1 extending along the longitudinal direction is greater than that of the embodiment of the present invention shown in FIG. 7 in which the protrusion 15 is not formed. .

In the case of the embodiment in which the pair of protrusions 15 are formed as protrusions, it is necessary to reinforce the protrusions 15.
In the basic example shown in FIGS. 3 and 4, the embedded part 18 that extends further toward the inner part is a reinforcing part 18a that is bent into a trapezoidal shape, and is reinforced by this, and the wing embedded part 18 is placed in the upper area of the cord layer 6. It is embedded in the endless band 1.

In addition, FIG. 5 shows the case for heavy load, and the reinforcing part 18 of the core bar 8
A specific example is shown in which a is curved, and FIG. 6 shows a case for heavy loads, and the difference is that the reinforcing portion 18a is thick.

FIG. 7 shows an embodiment in which the protrusions 15 are not formed on both shoulders of the central recessed part 7.
a is not formed.

The endless belt crawler 1 according to the present invention exhibits the following advantages when used by being hung on a running drive device shown in FIG.

In other words, the endless belt 1 circulates through the bottom wall 10 of the recess 8' of the embedded mandrel 8, which is formed at the bottom of the central recess 7 of the endless belt 1.
The driving wheel 2 is driven by meshing the meshing teeth 12 of the driving wheel 2 with the meshing hole 11 partitioned by the meshing hole 11 partitioned by the meshing hole 10. This is done by friction caused by the contact between the shoulders of the wheel 7 and the wheel passing portions or by the contact and support between the top surfaces 15' of the pair of protrusions 15 formed on both shoulders. Engagement hole 1
1 is always secure, and since the tooth 12 enters into the central recess T and engages, there is no possibility that the engagement will become uncertain due to vibration shock or the like.

In addition, on the side of the idler wheels 3 and idlers 4 where wheel derailment is likely to occur, the central body portion 13, which enters the central recessed portion 7 with a clearance, is located at the center of the side body portions 14, 14 that perform frictional transmission. However, in the specific example in which the protrusion 15 is formed, only the protrusion height of the protrusion 15 is such that the depth of the central recessed portion 7 is a dog, so that derailment is completely prevented.

At this time, each protrusion 15 is reinforced by the reinforcing part 18a of the core metal 8, so even if the protrusion 15 is made of an elastic material integrated with the crawler track, its durability is improved, and its elasticity is improved. It also has excellent vibration absorption performance.

Further, the bottom wall 10 of the recessed part 8' of the embedded core metal 8 is connected to the cord layer 6.
According to the specific example in which the central body portion 13 is located lower toward the ground contact side than the cord layer 6, the central body portion 13 is naturally located deeper toward the ground contact side than the cord layer 6, and therefore, as shown in FIG. When the band 1 is wound, the cord layer 6, which is the center of curvature on the bending surface of the endless band 1, is closer to both wheels 2 than the outer peripheral surface of the central body 13.
, 3, the endless belt 1 will not come off the wheels unless the distance between the axes between the two wheels 2 and 3 becomes small or the cord layer 6 breaks.

In the conventional model shown in Fig. 8, both the idler wheel E and the idler wheel F are located inside the cord layer B on their outer peripheral surfaces, and therefore closer to the center of both wheels, which is more likely to cause wheels to come off. There is.

In addition, even in the stacking direction of the endless band 1, the central trunk 13 is inserted into the central recess 7, so that even if it swings, the inner surfaces of the recesses 1, 8' on both outer surfaces of the trunk In a specific example in which a pair of protrusions 15 are formed, the height of this blocking is increased by the height of the protrusions 15, so that the prevention of derailment is complete.

At this time, if both side walls 9/, 9/ of the core metal are left exposed, even if the circumferential surface of the center body part 13 rides on it, it will immediately slide off, which will ensure prevention of derailment, and also prevent the body part 13 from slipping off. Since the circumferential surface and the circumferential side surface have a clearance with the recessed portions 7 and 8', they are spaced apart from the meshing hole 11 under normal conditions, which is effective in preventing vibrations and the like.

Furthermore, since the central recessed portion 7 of the endless band 1 is reinforced and shaped by the recessed portion 8' of the core bar 8, the shape of this recessed portion 7 may be deformed, causing the central body portion 13 to rise or climb over. There is no possibility that this will happen.

In addition, this allows the left and right side body parts 14, 14 to more reliably contact and transmit power with the wheel passing surface or the top surface of the protrusion 15 on the side opposite to the ground contact side of the endless band 1.

Further, the core bar 8 does not require any protrusions such as claw pieces as in the prior art, so the structure is simple and lightweight, and the endless band 1 as a whole can be easily manufactured at a low weight and cost.

And since the running surface other than drive wheel 2 runs on a flat surface,
The riding comfort is extremely good, and in this case, the contact surface of the idler wheel 3 and the endless belt 1 is formed by a pair of protrusions 15, 15.
In the embodiment in which the height of the wheel is increased, the soil removal performance is improved and the riding comfort is also improved, which is superior in terms of reliable running, complete prevention of wheel derailment, and good riding comfort.

Furthermore, since the grounding lug 5 is located in the projection area of the embedded core metal 8, the grounding lug 5 can be strengthened, and the grounding surface 10' of the bottom wall 10 of the cored metal 8 and the grounding surface of the main body are generally on the same plane. This makes it possible to prevent the core bar 8 and the bottom wall 10 from becoming an obstacle on the contact surface, preventing wear and damage while ensuring good retention and soil removal performance. First of all, it has a wide range of uses.

As a result of the above-described structure, the present invention works in cooperation with the metal core to prevent derailment, reduces the weight of the endless belt, suppresses vibrations, and prevents damage to the metal core.

In particular, in the present invention, since the ground plane of the endless band body and the ground plane of the bottom wall of the core metal are set on approximately the same plane, the complementary recessed portion is made relatively deep to effectively prevent wheel derailment. However, since the bottom wall of the core metal is formed so that it does not protrude in the ground contact direction from the ground contact surface of the main body when the track runs, it is preferable to prevent the bottom wall of the core metal from being worn out or damaged due to sliding contact with the ground or collision. It is particularly suitable as a crawler track for use in places with relatively hard ground such as gravel roads or dry areas.

[Brief explanation of the drawing]

Fig. 1 is an overall side view of an embodiment of the present invention, Fig. 2 is a plan view of the endless belt, Fig. 3 is a sectional view of the same essential parts, Fig. 4 is a rotating wheel,
FIGS. 5 to 7 are cross-sectional views of a modified embodiment of the core metal, and FIG. 8 is an explanatory view of a conventional example. 1...Endless band, 2...Drive wheel, 3...
...Idle wheel, 4...Idle wheel, 5...
- Lug, 6... Cord layer, 7... Center recess, 8... Embedded core metal, 8'... Core metal recess, 9 ... Side wall, 10 ... Bottom wall, 11 ... Engagement hole, 18 ... Embedded part.

Claims (1)

[Claims] 1. The center part of the endless strip is a central recessed part with a gutter-shaped cross section extending longitudinally toward the grounding side of the endless strip, and the recesses are embedded in rows at regular intervals along the longitudinal direction of the endless strip. The core metal has a bridge-shaped recess that fits into the inner surface of the central recess, and has an embedded part extending from the side wall of the recess of the core metal in the width direction of the endless band. The bottom wall of the core metal in the central concave portion of the endless band is provided with a row of engagement holes, and a grounding lug is formed protruding within the projection area of the core metal on the ground surface side of the endless band. An endless crawler track characterized in that a surface portion of the grounding surface of the main body and a surface portion of the grounding surface of the core bottom wall are set on approximately the same plane.