JPS5941434B2 - endless track - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an endless 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 attachment between the idler wheel and the endless band is likely to come apart, and there is a tendency for the wheel to come off, and the embedded core metal having a claw for engagement with the first driving wheel may be deformed or broken. There are many problems.

To explain this with reference to Fig. 4, A is the endless band main body, B is the cord layer for maintaining tension, C is the embedded core metal, and the concentric metal C is the cord layer of the endless band main body A. In the area above B, the metal core C is embedded at predetermined intervals in the longitudinal direction of the band, and -
- A pair of engaging claw pieces protrudes toward the opposite side from the ground surface.

According to the conventional example shown in FIG. 4, one drive wheel has an engaging hole that engages with a pair of engaging pawl pieces formed on the drum circular surface, or a par that engages with the pawl pieces that is arranged in a row. They are driven in mesh with each other in the shape of a hollow IJ ram, and the idler wheel is a rolling wheel with a circumference that fits between the pawl pieces, as shown by symbol E, and the idler wheel, denoted by symbol F, is a rolling wheel with a circumference that fits over the pawl pieces. It has a drum shape with grooves G.

Therefore, according to this example, apart from the driving wheels, the idle wheels E,
Both of the idler wheels F tend to come off easily, and deformation of the retaining pawl piece and breakage of the core bar C are problems, and breakage and deformation of the pawl piece cause poor engagement with the drive wheel, resulting in substantial damage. There is a risk that it may become impossible to drive.

Therefore, if the durability of the nail piece is improved by using the core metal C, %, the weight will be excessive, and since there are a plurality of core metals C, the total weight is large.

As a result of intensive research to eliminate the problems of the previous example, the inventor of the present invention has improved the shape of the endless belt main body, and
Works with the core metal to reliably prevent wheel derailment, reduce the weight of the endless belt,
They succeeded in providing an endless belt that promises to suppress vibrations.

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 γ extending in the longitudinal direction and having a gutter-shaped cross section such as a U-shape. A core metal 8 is embedded in the direction of the middle part 1.

The concentric bar 8 has eight gutter-shaped recesses formed in its center, similar to the central recess 7 of the endless band 1, and is embedded in both side walls 9, 9 of this recess 8' through reinforcing parts 18a. The wing pieces 18 are extended.

That is, the core bar 8 is a press-molded or cast metal flat plate, and includes a recessed part 8' consisting of a bottom wall 10 and both side walls 9, and the recessed part 8.
The reinforcing portions 18a having a trapezoidal cross section formed on both shoulders of the blade are thicker, and the embedded wing piece 1 is
8 extends outward and is formed to become gradually thinner in the extending direction.

In the embodiment, it is preferable that the inner surfaces 9', 9' of the side walls 9, 9 of the recessed part 8' and the bottom wall 10 are exposed to the surface of the recessed part 7 in the central recessed part 7.

That is, the inner surfaces 9', 9' are the inner surfaces 7' of the central recessed portion 7,
The bottom wall 10 is exposed on the same plane as the inner surface 7' in the form of a bridge.

It is made to be exposed across γ′.

The lug 5 may be divided into two parts at the lower surface of the recessed part γ, or it may extend over the entire width. positioned.

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 1 and 2 in the shape of a window hole, thereby forming one 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 1.
1, this endless band 1 is driven.

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 γ of the endless band 1, with an idle clearance between the recessed part 7 and the side walls 9, 9 and the bottom wall 10 of the core metal 8 in the recessed part γ. The central trunk 13 has a diameter smaller than that of the trunk 13 on both sides of the central trunk 13, 13, and its circumferential surface corresponds to the shoulders on both sides of the central recessed part 7 of the endless band 1, i.e., the rollers. It is formed from left and right side body parts 14, 14 that are connected and supported to each top surface 15' of a pair of protrusions 15 that protrude in the opposite direction from the ground contact side at the wheel passage part, and the intermediate idler wheel 4 is also completely It has a similar structure, but its shape is smaller in diameter than the idler wheel.

A pair of protrusions 15 formed on both shoulders of the central recessed part 7
has a trapezoidal cross-sectional shape and extends along the longitudinal direction of the band in the embodiment, and the recess depth of the central recess 7 of the endless band 1 is smaller than that of a case where the protrusion 15 is not formed. has been done.

When the pair of protrusions 15 are formed as protrusions, this protrusion 15
Since it is necessary to reinforce the blade part 18, the wing part 18 extends from both side walls 9 of the core bar 8 toward the inner part via the reinforcing part 18a, but the wing part 18a extends in the extending direction as shown in FIG. The thickness gradually decreases over time, and the blade portion 18 is embedded in the endless band 1 in the upper region of the cord layer 6.

The trapezoidal top surface 15 of the protrusion 15 and the trapezoidal top surface of the reinforcing portion 18a have the same width, are parallel to each other, and are vertically aligned.

If the endless belt 1 according to the present invention is used by hanging it on the traveling drive device shown in FIG. 1, the following advantages will be obtained.

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 γ 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 . Each top surface 1 of a pair of protrusions 15 formed on both shoulders of 7
5', the engagement between the tooth 12 of the drive wheel 2 and the engagement hole 11 is always reliable, and the tooth 12 enters into the central recess γ and is engaged. Therefore, there is no risk that the alignment will become uncertain due to vibration shock, etc.

In addition, on the side of the idler wheels 3 and 4, where derailment is likely to occur, the central body part 13, which enters the central recessed part γ with a clearance, is located at the center of the side body parts 14, 14 that perform friction transmission. However, only the height of the protrusion 15 is such that the depth of the central recessed part γ 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 bar 8, so even if the protrusion 15 is made of an elastic material integrated with the cover, its durability is improved. It also has excellent vibration absorption ability.

Since the trapezoidal top surface 15' of the protrusion 15 and the trapezoidal top surface of the reinforcing portion 18a are parallel to each other and have the same width, the elastic deformation of the protrusion 15 becomes uniform in the width direction. There is little risk of cracks occurring at the stepped portion between the reinforcing portion 18a and the wing piece 18, and the vibration absorption ability is excellent.

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 one shown in Fig. 4, 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, in the weight direction of the endless band 1, the central trunk 13 is inserted into the central recess γ, so even if swinging occurs, the inner surface of the recesses 7, 8' on the outer surface of the trunk Since the height of this prevention is increased by the height of the pair of protrusions 15, the prevention of derailment is complete.

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

Also, the central recessed portion 7 of the endless band 1 is reinforced and shaped by a thicker recessed portion 8' consisting of a bottom wall 10 and both side walls 9 of the core bar 8, and a thicker reinforcement FA 18a similar to the both walls 9 and 10. Therefore, there is no possibility that the shape of the recessed portion 7 will be deformed and the central body portion 13 will rise or climb over it.

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

In addition, the core metal 8 has a reinforcing portion 18a at the base portion corresponding to the protrusion 15.
Since the thickness of the blade 18 is small in the extending direction, the overall weight can be reduced while the strongest structure is applied to the part where the most load is applied.This makes the structure simple and lightweight. Therefore, the endless band 1 in general can be made lightweight and easy to manufacture at low 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
Since the wheels are formed high, soil removal performance is improved, and riding comfort is also improved, resulting in reliable running, complete prevention of wheel derailment, and good riding comfort.

Therefore, it has a wide range of uses including agricultural machinery and work vehicles.

[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 same endless band, FIG. 3 is a sectional view of the same essential part, and FIG. 4 is an explanatory diagram of a conventional example. 1...Endless band, 2...Drive wheel, 3...
...Idle wheel,) 4...Idle wheel, 5...
... Lag, 6... Code layer, 7...
Center recessed part, 8......! Satonin core metal 8'...
... Core metal recess, 9... Side wall, 10...
...Bottom wall, 11...Matching hole, 15...
Projection, 18...Embedded wing piece part, 18a...
・Reinforcement part.

Claims (1)

[Claims] 1. A central recessed part in which the central part of the endless band is recessed in the longitudinal direction toward the grounding side of the endless band with a trough-shaped cross section, and a part consisting of a bottom wall and both side walls that are fitted into the trough-shaped recessed part. Core metals with thick recesses are embedded in rows at regular intervals along the longitudinal direction of the endless band, and engagement holes are arranged in rows between the bottom walls of the core metals in the central recess of the endless band. A protrusion with a trapezoidal cross section swollen in the direction opposite to the ground contact side is formed in the rolling wheel passing portion at both shoulders of the central recessed part of the band, and the core metal is extended from the side wall of the recess into a pair The embedded wing part is extended and embedded in the endless band main body, and reinforcement having a trapezoidal cross section protrudes from the wing part toward the protrusion at each base of the core metal side wall and the wing part. The thickness of the blade part is gradually thinner in the extending direction than the reinforcing part, and further, the trapezoidal top surface of the protrusion and the trapezoidal top surface of the reinforcing part are parallel to each other and correspond to each other vertically. An endless belt characterized by: