JPS5941433B2 - endless track - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an endless track for an endless traveling drive device including a crawler.

As is well known, the endless belt of the crawler type is made of rubber or other bullet 1 raw material and circulates around the sprocket 1 by meshing or frictionally interlocking with foil, drum foil, etc., but it corresponds to 1 drive wheel. The attachment between the idler wheel or the intermediate idler wheel and the endless belt tends to come off easily, and the wheels tend to come off easily. There are many problems such as causing

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. 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 drive wheel is formed by forming an engaging hole in the drum circular 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 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 wheels, the idle wheels E,
Both the idler wheels F are easily dislocated, 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, resulting in substantial damage. There is a risk that it may become impossible to drive.

Therefore, if the durability of the core metal C, especially the nail piece, is improved, 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 improved the shape of the endless belt main body, and worked with the core metal to reliably prevent wheel derailment. They 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, in which 1 is an endless belt, 2 is 3 driving wheels, 3 is an idler wheel, 4 is the intermediate free wheel.

The endless belt 1 is made of rubber or other elastic material, has lugs 5 formed in the direction of contact with the ground, 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. A core metal 8 is embedded in the direction of the middle part 1.

The concentric bar 8 has a trough-shaped recess 8' formed in its center, similar to the central recess 7 of the endless band 1, and its side walls 9, 9.
The winglet portions 18, 18 are shaped to be more extended, and the winglet portions 18
A reinforcing portion 18a is provided at the base of the side wall 9 and can protrude upward from the wing portion 18 in the figure.

The core bar 8 is preferably configured such that the inner surfaces 9', 9' of both side walls 9.9 of the recessed part 8' and the bottom wall 10 are exposed on the surface of the recessed part 7 in the central recessed part 7.

That is, the inner surfaces 9' and 9' are the inner surfaces 7/9 of the central recessed portion 7.
, y/, and the bottom wall 10 is exposed in a bridge shape between the inner surfaces 7' and γ', and the ground plane of the endless band body 1 and the bottom wall 10 of the core bar 10 are exposed on the same plane. The upper surface (anti-ground surface) is located on substantially the same plane.

The lug 5 may be divided into two parts at the lower surface of the recessed part 7, or it may extend over the entire width, but preferably each lug 5 is positioned at least partially within the projection area of the core bar 8 as shown in the second figure. are doing.

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 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 anti-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 portion 1' of the band main body.

That is, the tension-maintaining cord layer 6 is located between the bottom wall 10 and the embedded portion 18, and is embedded over the entire circumference in the longitudinal direction of the band.

On the other hand, the other idler wheel 3 corresponding to the first driving wheel 2 is arranged in the central recessed part γ of the endless band 1, and the recessed part γ and the recessed part γ
A central body part 13 is large enough to have a clearance with the side walls 9, 9 and the bottom wall 10 of the inner core bar 8, and a central body part 13 has a diameter smaller than that of the body part 13 on both sides of the central body parts 13, 13, and has a circumferential surface. The left and right sides that are connected to and supported by the respective top surfaces 15' of a pair of protrusions 15 protruding in the direction opposite to the ground contact side on the both side shoulder parts of the central recessed part 7 of the endless band 1 and the wheel passing part. It is formed from body parts 14, 14, and the intermediate idler wheel 4 has exactly the same 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 γ
has a trapezoidal cross-sectional shape and extends along the band width direction in this embodiment, and the depth of the central recessed portion γ of the endless band 1 is greater than that of a case where the protrusion 15 is not formed. It is considered a dog.

When the pair of protrusions 15 are formed as protrusions, this protrusion 15
Because it is necessary to reinforce the core bar 8, a third,
In the basic example shown in FIG. 4, the reinforcing portion 18a is bent into a trapezoidal shape.
The embedded wing piece portion 18 is embedded in the endless band 1 in the upper region of the cord layer 6.

In addition, FIG. 5 1 shows the case for heavy load, and the reinforcing portion 1 of the core bar 8
A specific example is shown in which 8a is in a curved form, and the fifth
FIG. 2 shows a case for heavy loads, and the difference is that the reinforcing part 18a is made thicker. It is located almost on the same plane.

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.

That is, 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 holes 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, with respect to the height of the protrusion 15, the depth of the central recessed portion 7 is slightly different, and the anti-ground surface 10' of the bottom wall 10 of the core bar 10 and the main body ground surface 1' are approximately on the same plane. Since it is located above, the recessed part 8
Without reducing the retention force at the ``ζ'', the depth becomes a dog, completely preventing the wheel from derailing.

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 outwardly curved material that is integrated with the crawler track, its durability is improved. Bullet 1'
The vibration absorption performance is also excellent at fAe+-B.

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 belt 1 is wound, the cord layer 6, which is the center of the opposite shore on the bending surface of the endless belt 1, is closer to both wheels 2 than the outer peripheral surface of the central trunk 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.
Even if the cord falls down, the outer circumferential surface is located inside the cord layer B, and therefore closer to the center of both wheels, which is better than the case where wheel derailment is more likely to occur.

In addition, even in the stacking direction of the endless band 1, the central body part 13 is inserted into the central recessed part 7, so that even if rocking occurs, the inner surface of the recessed parts 7, 8' on the outer surface of the body part Since the height of this prevention is added to the height of the pair of protrusions 15, the prevention of derailment is perfect.

At this time, if both side walls 9' and 9' of the core bar 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.

Furthermore, since the central recessed portion 1 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 it. 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 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.

In addition, in this embodiment, all wheels other than the drive wheel 2 run on a flat surface, so the riding comfort is extremely good. Since the protrusions 15 and 15 are formed high, soil removal performance is improved and ride comfort is also improved, ensuring reliable running, complete prevention of wheel derailment, and improved riding comfort. Excellent.

Moreover, since the tension-maintaining cord layer 6 is located between the bottom wall 10 of the recessed part of the core metal 8 and the embedded part 18 and is embedded in the longitudinal direction of the endless band 1, the endless band 1 is The embedded part 18 reliably supports the load received from the side body part through the cord layer 6, and when the meshing teeth of the first drive wheel 2 engage and perform one drive, the core metal 8 supports the first drive wheel. Since the embedded part 18 can firmly support the tensile force pulled from the tangential direction to the outer circumferential direction through the cord layer 6, the embedded part 18 of the core bar 8 can be prevented from peeling off toward the ground side of the endless band 1. do not have.

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 endless belt, Fig. 3 is a sectional view of the same essential parts, Fig. 4 is a rotating wheel,
FIG. 5 is an explanatory diagram of a 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 diagram of a conventional example. 1... Endless band, 1'... Ground plane, 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, 10' ... Anti-ground surface, 11 ... Meshing hole, 15...protrusion,
18...Embedded wing piece part, 18a...Reinforcement part.

Claims (1)

[Claims] 1. A core metal having a central recess in which the central part of the endless band extends in the longitudinal direction toward the grounding side of the endless band and has a trough-shaped cross section, and is fitted into the trough-shaped recessed surface. are embedded in rows at regular intervals in the longitudinal direction of the endless tube, and engagement holes are arranged in rows between the bottom walls of the core metal in the central recessed part of the endless band, and both shoulders of the central recessed part of the endless band A protrusion protruding in the direction opposite to the ground contact side is formed in the wheel passing portion in the section, and the core metal further has a pair of embedded blade portions extending from the side wall thereof. , the embedded wing part is embedded in the endless band main body, and the base of each wing part and each side wall is provided with a reinforcing part that protrudes from the wing part toward the protrusion, and the ground plane of the endless band main body is The anti-contact surface of the bottom wall of the core metal is located on the same plane as the ridge, and furthermore, a tension-retaining cord layer is buried between the bottom wall of the core metal recessed part and the embedded part and covers the entire circumference in the longitudinal direction of the band. An endless track that is characterized by: