JPS5841227B2 - 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 attachment between the free wheel and the endless belt is easy to separate, and there is a strong tendency for the wheel to come off! There are many problems such as deformation or breakage of the embedded core metal having claws for engagement with the drive wheel.

To explain this with reference to FIG. 6, 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. A pair of retaining claws of the core metal C are embedded at predetermined intervals in the longitudinal direction of the band in the upper region, and protrude toward the side opposite to the ground surface 1.

According to the conventional example shown in FIG. 6, the driving wheel is formed by forming an engaging hole in the drum peripheral surface that engages with a pair of retaining pawl pieces, or by forming a hollow hole with a row of bars that engage with the pawl pieces. The idler wheel A 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 is a concave wheel that engages across the claw pieces DVC. It has a drum shape with a circumferential groove G.

Therefore, according to this example, apart from the driving wheels, the idle wheels E,
Both freewheeling wheels F tend to come off easily, and deformation of the engaging pawl piece and breakage of the core metal C are large, and breakage and deformation of the pawl piece lead to 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 core metal C1, especially the nail piece, is improved, the weight will be excessive, and since there are multiple core metals C, the total weight 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 succeeded in providing an endless belt that promises to reduce the weight of the belt and 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 belt 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.

In the center of the endless band 1, recesses 7 with a U-shaped cross section and a gutter-like shape are provided in the longitudinal direction. A core metal 8 is embedded in the width direction of the band 1.

The concentric bar 8 has a recessed part 8 having the same shape as the central recessed part 7 of the endless band 1 formed in its center, and preferably extends from the central recessed part 7 to both side walls of the recessed part 8'. The inner surfaces 9/, 9/ and the bottom wall 10 of the recessed portion 7 are exposed.

That is, the inner surface 9'. 9 are exposed on the same plane as the inner surfaces 7/, γ of the central recessed part 1, and the bottom wall 10 is exposed on the same plane as the inner surfaces 7', 7 in a bridge shape.
'Be exposed for a period of time.

The lug 5 may be divided into two parts at the lower surface of the recessed part 7 or may extend over the gold mine, but in this embodiment, each lug 5 has at least a portion within the projection area of the core metal 8 as shown in the second figure. 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 11 in the shape of a window hole, thereby shaping the drive wheel 2 into a sprocket foil shape, 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.

Furthermore, the position of the bottom wall 10 that is shaded by the core metal 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 drive wheel 2 is provided in the central recess T of the endless band 1, with an idle clearance between the side walls 9, 9 and the bottom wall 10 of the core metal 8 in the recess 7 and recess γ. A central body part 13 having a size of 1, and a central body part 13 having a diameter smaller than that of the body part 13 on both sides of the central body parts 13, 13, and whose curved surfaces are opposite to the grounding side at both shoulder parts of the central recessed part γ of the endless band 1. 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 the direction, and the intermediate idler wheel 4 has the same structure, but its shape is different. It has a smaller diameter than the idler wheel.

A pair of protrusions 15 actually formed on both shoulders of the central recess 70
has a trapezoidal cross-sectional shape and extends along the longitudinal direction of the band, and the recess depth of the central recessed portion 7 of the endless band 1 is as large as that of a case where the protrusion 15 is not formed. has been done.

When the pair of protrusions 15 are actually formed, the protrusions 15
In the basic example shown in Fig. 3-4, the embedded part 18 extending in the width direction from both side walls 9 of the core metal 8 is formed into a trapezoidal bent reinforcement part 18a. The blade embedded portion 18 is embedded in the endless band 1 in the upper region of the cord layer 6.

Among them, 5th C1) is for heavy loads, and shows a specific example that is different in that the reinforcing part 18a of the core bar 8 has a curved form, and 5th C2) is for heavy loads, and shows a specific example in which the reinforcing part 18a is curved. The difference is that 18a is made thicker.

If the endless belt crawler 1 according to the present invention is used by hanging it on a 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 7 of the endless belt 1.
The meshing teeth 12 of the driving wheel 2 mesh with the meshing holes 11 partitioned by Each top surface 1 of a pair of protrusions 15 formed on both shoulders of the recessed portion 70
5', the engagement between the teeth 12 of the drive wheel 2 and the meshing hole 11 is always reliable.
Since the tooth 12 enters into the central recess 7 and engages with it, the attachment becomes uncertain or not at all due to vibration shock or the like.

In addition, on the side of the idler wheels 3 and 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 and 14 that perform frictional transmission. The height of the protrusion 15 is the same as the depth of the central recess 7, which completely prevents the wheels from coming off.

Since each protrusion 15 is reinforced by the reinforcing part 18a of the core bar 8, even if the protrusion 15 is made of an elastic material integrated with the crawler track, its durability is improved. It also has excellent vibration absorption performance due to its elastic properties.

The bottom wall 10 of the recessed part 8' of the embedded core metal 8 is 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 buttoned 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. 6, both the idler wheel E and the idler wheel F are located inside the cord layer B on their outer circumferential surfaces, and therefore closer to the center of both wheels, making it easier for wheels to come off. Are better.

Moreover, even if the button is pressed in the width direction of the endless band 1, the central trunk 13 is inserted into the central recess T, so even if it swings, the recesses 7 and 8' on the outer circumferential surface of the trunk It is blocked by hitting the inner surface, and this blocking height is added by the height of the pair of protrusions 15, so that the prevention of derailment is perfect.

In this case, both side walls 9' of the core metal. 9 If it is exposed in a rainbow-like manner, even if the circumferential surface of the central trunk section 13 rides on the vehicle, it will immediately slide off, thereby ensuring prevention of derailment. Since it has a clearance, it is 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 81 of the core bar 8, the shape of this recessed portion 7 may be deformed, and the central trunk portion 13 may rise or climb over it. Or it doesn't happen at all.

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.

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 since the contact surfaces of the idler wheels 3 and the endless belt 10 are formed high as a pair of protrusions 15, the soil removal performance is also improved. Ride comfort can also be improved, ensuring reliable driving and
Excellent in completely preventing wheels from coming off and providing a comfortable ride.

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

[Brief explanation of drawings]

Fig. 1 is an overall side view of the 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 the idler wheel,
FIG. 5 is an explanatory view of the state of engagement with an idler wheel, FIGS. 5, 1 and 2 are cross-sectional views of a modified embodiment of the core metal, and FIG. 6 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.
...Central recess, 8...Embedded core metal, 8'...Core metal recess, 9...Side wall, 10...Bottom wall, 11...Matching hole, 15...Protrusion Part, 18a... Reinforcement part.

Claims (1)

[Claims] 1. The central part of the endless band is a central recessed part that is recessed in the longitudinal direction toward the grounding side of the endless band and has a gutter-shaped cross section, and a core metal having a recessed part that is fitted into the bridge-shaped recessed part is provided. The core metals are embedded in rows at predetermined intervals in the longitudinal direction of the endless band, and engaging holes are provided in rows between the bottom walls of the core metals in the central recessed part of the endless band. The shoulder part is provided with a protrusion that bulges in the direction opposite to the grounding side, and a reinforcing part is formed on the core metal corresponding to this protrusion, and the embedded part is inserted into the endless band body through this reinforcing part. An endless crawler track characterized by extending from a side wall.