JP3349100B2 - Elastic crawler device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elastic crawler device, and more particularly to an elastic crawler device used for a traveling device such as a construction machine such as a backhoe or an agricultural machine to reduce or reduce vertical vibration of a body. About things.

[0002]

2. Description of the Related Art As a crawler belt (elastic crawler device) for a tracked vehicle such as a bulldozer or a power shovel, a patent No.
No. 5,529,953 discloses that, in a rubber crawler belt of a tracked vehicle in which core bars meshing with every one tooth of an activation wheel are sequentially arranged at equal intervals on an infinite belt rubber belt wound around a running portion, the center of the core bar is The top surfaces of the pair of protrusions provided on the portion are the rolling portions of the rolling wheel, the long top surface on one side of the protrusion is the rolling portion of the rolling wheel, and the long top surface on one side of the projection is Both sides shall be configured to protrude in the circumferential direction of the rubber crawler belt from both sides of the other short top face, and the top row of the core metal having a long top face and the short top face shall be alternately arranged in series in the circumferential direction. According to this conventional example, it is possible to reduce the number of times the load on the rolling wheels fluctuates, and as a result, vibration and noise during traveling can be reduced. Since pollution can be reduced, the adhesive strength between the rubber belt and the core metal increases, and the rubber bell A rubber crawler belt of life is improved since it suppresses peeling of the metal core. Furthermore, was that ride operator also becomes good. ".

[0003]

However, tracked vehicles (construction machines, agricultural machines, etc.) have many opportunities to travel on a sloped road surface. The device is relatively inclined, and the right and left sides of the crawler body are inclined in the vertical direction. Reduction or suppression of vertical vibration and prevention of wheel separation due to this inclination cannot be solved by the conventional example. The present invention not only reduces vibration pollution and noise pollution, but also improves ride comfort of a driver (operator) when a tracked vehicle travels on an inclined road surface, even if the body and the crawler device are relatively inclined. It is an object of the present invention to provide an elastic crawler device capable of reliably preventing derailing.

[0004]

According to the present invention, a core metal 3 is embedded in a crawler main body 2 formed in an endless band shape by an elastic material at intervals in a band longitudinal direction. A pair of left and right rail projections 5L and 5R are formed at the center portion in the band width direction and formed on the inner peripheral side of the crawler main body 2 and have a top surface as a rolling portion of the rolling wheel 4. One of the rolling portions of the projections 5L, 5R is a long / short rail projection 6L, 6R longer in the band longitudinal direction than the other, and the long / short rail projections 6L, 6R are arranged in a staggered left and right manner. In the crawler device, the following technical measures are taken to achieve the above-mentioned object.

That is, in the elastic crawler device according to the first aspect, the protruding heights of the long and short rail projections 6L and 6R are such that the height of the long rail projection 6L is high and the height of the short rail projection 6R is low. In addition, a step 8 is formed at the protruding height of the long and short rail projections 6L and 6R. By adopting such a configuration, for example, FIG.
When the crawler body 2 is inclined by the angle θ due to the rolling wheel load F when traveling on the inclined road surface D indicated by
w / 2 tan θ), the vertical vibration is reduced or suppressed by lowering the wheel relatively. By arranging the long and short rail projections 6L and 6R in a staggered manner, the number of times of load fluctuation of the wheel is increased. Is reduced.

In the above-mentioned claim 1, the pair of left and right long and short rail projections 6L, 6R also serve to prevent the rolling wheel 4 from coming off, and are formed integrally with the cored bar 3 to protrude. Desirable (claim 2). Further, a core metal 3 is embedded in the crawler main body 2 formed in an endless band shape by an elastic material at intervals in a band longitudinal direction. A pair of left and right rail projections 5L, 5R is formed on the inner peripheral side and has a top surface as a rolling portion of the rolling wheel 4, and one of the rolling portions of the pair of left and right rail projections 5L, 5R is provided. In an elastic crawler device in which the long and short rail projections 6L and 6R are longer than the other in the longitudinal direction of the band, and the long and short rail projections 6L and 6R are arranged in a staggered left and right direction, a pair of left and right long and short rails is provided. The projections 6L and 6R also serve to prevent the rolling wheel 4 from coming off, and are formed integrally from the metal core 3 to form a ridge or a long rail projection 6L.
Is formed integrally with the core bar 3 and the short rail protrusion 6R is a protrusion made of an elastic material.
Outer sides of both sides L, 6R, rail surfaces 9L, 9R of both side flange portions 4B of the rolling wheel 4 are formed on the inner peripheral side of the wing portions 3B, 3C of the cored bar 3, and the rail surfaces 9L, 9R. Are long and short in the longitudinal direction of the band, and the long rail surface 9L is
R or the outside of the long rail projection 6L, the short rail surface 9
R is located outside the long rail protrusion 6L or the short rail protrusion 6R, and the long and short rail surfaces 9L and 9R are high in the long rail surface 9L and low in the low rail surface 9R.
It is desirable that a step 10 is formed in L and 9R (claim 4).

According to the elastic crawler device of the fourth aspect, as shown in FIG. 2, the body 4A of the rolling wheel 4 uses the top surfaces of the pair of left and right long and short rail projections 6L, 6R as rolling portions. Rolling, while the flanges 4B, 4B on both sides of the rolling wheel 4 are long.
Rail surface 9 on each outer side of short rail projections 6L, 6R
L and 9R are rolled, and a step 10 is formed on the pair of left and right long and short rail surfaces 9L and 9R, thereby reducing the inclination vibration between the body traveling on the inclined road surface and the crawler body 2. Or to suppress. Furthermore, the configuration of claim 4 described above in claim 1 can be adopted (claim 3).

Further, in the elastic crawler device according to any one of claims 1 to 4, the long / short rail projections 6L, 6R
The long rail projection 6L has a groove 3G formed in the middle of the rail longitudinal direction, and the groove bottom 3G1 of the groove 3G is formed as a downwardly inclined discharge part 3G2 toward the metal core wing part 3C. It is characterized by the following (claim 5). By adopting such a configuration, in addition to the above-described functions and effects, the dirt, earth and sand, gravels, and the like that have entered between the pair of left and right long / short rail projections 6L and 6R are discharged as shown in FIG. The claw portion of the driving sprocket wheel or the like at the winding portion is securely engaged and disengaged with the locking portion 3A formed at the center in the left-right direction of the cored bar 3 so that the crawler body 2 is moved in the band longitudinal direction. It circulates smoothly and lightly.

That is, according to the elastic crawler device of the present invention, the portion (long / short rail protrusion or long / short rail surface) which becomes the passage surface of the rolling wheel is made long and short on the left and right, and the passage surface is formed in the crawler circumferential direction. By repeatedly arranging the long and short sides, contact noise between the rolling wheels and the passing surface is reduced, and resonance phenomena that cause strong vibrations when the natural frequency of this machine matches the rotational frequency of the crawler are reduced. It is to decrease. In other words, arranging regularly with a passage surface having the same length as the circumferential direction generates a single hitting sound with a constant cycle while hitting the rolling wheels, as in the present invention. By forming a long and short passage surface in the circumferential direction, not only a single sound but also a plurality of sounds will be generated in the impact sound with the wheels,
The sound could be lowered (white noise) by frequency modulation of the sound, and the contact noise could be reduced.

Also, on the vibration surface, there is a natural vibration during running of the machine equipped with the crawler, and the running vibration of the crawler, which is easily synchronized with the natural vibration, is reduced by only one kind of the length of the passage surface of the crawler. By using two or more types instead of lengths, the frequency of the crawler passing through the rolling wheels is modulated, which reduces the resonance phenomenon with the machine and reduces running vibrations, resulting in a driver's bodily sensation. Vibration can be reduced and traveling performance can be improved. Of course, the impact sound can be further reduced by making one of the left and right passage surfaces a projection made of an elastic material.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. 1 and FIG.
The elastic crawler device 1 according to the embodiment has a core metal 3 embedded in a crawler main body 2 formed in an endless band shape by an elastic material such as rubber at intervals in a band longitudinal direction. A pair of left and right rail projections 5 are formed at the center of the main body 2 in the band width direction on the inner peripheral side of the crawler main body 2 (opposite the ground contact surface side), and the top surface is a rolling portion of the rolling wheel 4.
L, 5R, and the rolling portions of the rail projections 5L, 5R are long and short rail projections 6, one of which is longer in the band longitudinal direction than the other.
L, 6R, and the long and short rail projections 6L, 6R.
Are arranged in a staggered pattern on the left and right.

The crawler main body 2 has an endless (endless) belt shape, and a driving sprocket wheel and a driven wheel are disposed at the winding portions at both ends, and an engaging hole 7 into and out of which a claw portion of the driving sprocket wheel is disengaged. Are formed between the metal cores 3. Core bar 3 according to the embodiment shown in FIGS. 1 and 2
Is a pair of left and right long
The bases of the short rail projections 6L and 6R are connected to each other by a rod 3A, and furthermore, the left and right wing parts 3B and 3B extend outward from the bases on both sides of the pair of left and right long and short rail projections 6L and 6R. 3C, the height of the pair of long and short rail projections 6L and 6R is made higher than the height of the short rail projection 6R (the height of the short rail projection 6R). Is lower than the height of the long rail projection 6L), and a step 8 is formed between the two, and the inner peripheral surfaces of the left and right wing portions 3B, 3C are on the outer sides of the left and right pair of long and short rail projections 6L, 6R. The long and short rail surfaces 9L and 9R are formed so as to be exposed, and the long and short rail surfaces 9L and 9R are short rail surfaces 9L.
The height of R is formed lower than the height of the long rail surface 9L, and a step 10 is formed between the two.

As shown in FIG. 2, a pair of left and right long / short rail projections 6L and 6R are formed so that the trunk 4A of the rolling wheel 4 rolls on the top surface thereof. Are rolled on the long and short rail surfaces 9L and 9R, so that the pair of left and right long and short rail projections 6L and 6R also serve to prevent the rolling wheel 4 from falling off. The pair of left and right long / short rail projections 6L, 6R and the pair of left and right long / short rail surfaces 9L, 9R which are long and short in the longitudinal direction of the band are arranged such that the long rail surface 9L is located outside the short rail projection 6R. As shown in FIG. 1, the long rail projections 6L and the short rail surfaces 9R are arranged as a set, and the short rail projections 6R and the long rail surfaces 9L are arranged as a set. Here, the long and short rail projections 6L and 6R and the long and short rail surfaces 9L and 9R are substantially continuous rolling surfaces of the rolling wheel 4 in the belt longitudinal direction, so that vertical vibration is reduced. It has been reduced.

Further, as shown in FIG. 1, narrow grooves 10L and 10R are formed on the inner peripheral surface of the crawler body 2 between the long and short rail surfaces 9L and 9R which are adjacent in the circumferential direction. The wide grooves 11L and 11R are formed on the inner peripheral surface of the crawler body 2 corresponding to the left and right outer sides of the narrow grooves 10L and 10R, respectively.
L, 10R and the left and right wide grooves 11L, 11R allow the crawler body 2 to have good flexibility at the winding portion (the position of the driving sprocket and the driven wheel) of the crawler body 2.

In FIG. 2, the left and right wing portions 3 of the cored bar 3 are shown.
The crawler body 2 corresponding to B, 3C has an extension body 12L,
While 12R is embedded along the belt longitudinal direction,
On the outer peripheral surface of the crawler main body 2, lugs 13 made of an elastic material (rubber) protruding from the main body 2 are arranged. FIG.
4 and FIG. 4 show a second embodiment of the elastic crawler device 1 according to the present invention. Since the configuration and operation described above with reference to FIG. 1 are basically common, common parts are shown as common parts. The differences will be mainly described.

In the second embodiment, the long and short rail surfaces 9L and 9R of the first embodiment are not formed, and a pair of left and right long and short rail protrusions 6L and 6R is formed integrally with the cored bar main body, and the rolling wheel 4 is formed with the top surfaces of the long and short rail projections 6L and 6R as rolling surfaces.
The left and right body portions 4A of the rolling wheel 4 are rolled, and the circumferential flange 4B formed on the body portion 4A of the rolling wheel 4 is raised by the left and right rail protrusions 6L and 6R.
The rail projections 6L, 6R also serve to prevent derailing by entering between, and a pair of left and right long / short rail projections 6L, 6R are provided.
In R, the long rail protrusion 6L has a high protrusion height and the short rail protrusion 6R has a low protrusion height, and a step 8 is formed therebetween.

Accordingly, when the crawler device 1 travels on the inclined road surface D and the load F of the rolling wheel 4 acts, the crawler device 1 is relatively lowered by T = w / 2 tan θ due to the step 8. This makes it possible to reduce or suppress vertical vibration while traveling on an inclined road surface (this operation is the same in the first embodiment). In FIG. 3, two narrow grooves 10L and 10R formed between the metal cores of the crawler main body 2 are formed, and the flexibility of the winding portion of the crawler main body 2 in cooperation with the wide grooves 11L and 11R is improved. It has been made smoother.

FIGS. 5 and 6 show an elastic crawler device 1 according to a third embodiment, in which the short rail projection 6R described in the first embodiment is replaced by a crawler in the third embodiment. Like the main body 2, the main rail 2 is made of an elastic material (the long rail projection 6L is a projection integral with the metal core 3), and the short rail projection 6R is physically joined by an engagement projection 3D formed on the metal core 3. It is vulcanized and bonded. The left and right long and short rail surfaces 9L and 9R are covered with the elastic material of the crawler body 2.

Also in the third embodiment, the long / short rail projections 6L and 6R have a protruding height, a step 8 is formed therebetween, and the long / short rail surface 9 is formed.
Steps 10 are also formed for L and 9R, and the rolling wheel 4 in the form shown in FIG. 2 is assumed to roll, and the steps 8 and 10 reduce vertical vibration due to inclination during traveling on an inclined road surface. Or to suppress it. In the third embodiment, a long rail projection 6L and a long rail surface 9L are arranged side by side to form a set, and a short rail projection 6R and a short rail surface 9R are arranged left and right, as shown in FIG. Are arranged in a zigzag pattern on the left and right sides.
Therefore, common parts are indicated by common reference numerals.

FIG. 12 shows, as representatively shown by the core bar 3 in the elastic crawler device according to the second embodiment, constricted concave portions 3F before and after the rising portions of the left and right long and short rail projections 6L and 6R. When the core 3 is manufactured by a casting mold, a horizontal split mold can be adopted as shown by an arrow D in FIG. 12 so that the weight of the core 3 can be reduced. In this regard, the present invention is also applicable to the cored bar 3 of the first embodiment.
The fact that the weight of the core metal 3 can be reduced means that the core metal has a large number of burials in the crawler body 2, so that the total weight is greatly reduced and the crawler device greatly contributes to the reduction of fuel consumption.

FIGS. 7 to 11 show an elastic crawler device 1 according to a fourth embodiment.
The short rail projections 6L and 6R are integrally formed, are embedded in the crawler body 2 in a staggered manner with a step 8 therebetween, and the long rail projections 6L are located in the middle in the rail longitudinal direction. A groove 3G is formed at the bottom of the groove 3G. The groove bottom 3G1 of the groove 3G has a discharge portion 3 inclined downward toward the metal core wing 3C.
G2, which is clogged between the engagement holes 7, facilitates the discharge of the soil, sand, gravel, and the like to the outside by the discharge portion 3G2, thereby accurately engaging and disengaging the claw portion of the drive sprocket at the winding portion. By making the material 3A high, the durability at the time of engaging and disengaging the claw portion is improved.

Further, as shown in FIG. 11, short rail projections 6R are located at positions corresponding to the left and right grooves 3G between the long rail projections 6L, and the front surfaces of the front and rear long rail projections 6L are illustrated. By making the inclined angle portion 3H as shown in FIG.
Vibration due to rolling of the rolling wheel 4 shown in FIG. 10 is reduced or suppressed. In the above-described fourth embodiment, other configurations and operations are common to the above-described second embodiment and the like, and thus common portions are denoted by common reference numerals. In the first to fourth embodiments described above, the material of the cored bar 3 is most preferably a metal material, but it can also be made of a hard resin, a hard resin containing reinforcing fibers, or the like.

The elastic projection 6R shown in FIG. 6 may be made of a harder rubber material than the crawler main body 2, and a plurality of rolling wheels in each embodiment may have a track shape. They are arranged in a frame. In the above-described first to fourth embodiments, the long rail projection 6L and the long rail surface 9L are formed by the metal core wings 3B, 3B.
It is formed longer than the width of C (extended in the crawler longitudinal direction), while the short rail protrusion 6R and the short rail surface 9R are the same width as or slightly shorter than the width of the core metal wings 3B, 3C. Furthermore, regarding the metal core 3 of the first to fourth embodiments,
As shown in FIG. 1, the left and right lateral deviation prevention protrusions 3J protrude between the core metals 3 adjacent in the circumferential direction,
It is desirable that the projection 3J can be engaged in the left-right direction.

[0024]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An elastic crawler device according to the present invention (short rail protrusion is lower than a long rail protrusion by 1 mm) and a conventional elastic crawler device (long and short rail protrusions have the same height)
Vibration characteristic tester (30-52.5 × 84K-303D)
Table 1 below shows the test results obtained by using NR to measure the vibration acceleration (Z) when the rolling wheel rolls on the crawler vibration surface.
Shown in

[0025]

[Table 1]

As is apparent from Table 1 above, the elastic crawler device according to the present invention in which the short rail projections of the long and short rail projections are lowered by 1 mm has the displacement amount and the Z value even when the running speed is either 250 or 500. It can be seen that the value of the vibration is clearly smaller than that of the conventional example, which is clearly effective, and that the rate of increase of the Z vibration with respect to the speed change is small.

[0027]

As described in detail above, according to the elastic crawler device of the present invention, the vertical vibration due to the relative amplitude with the machine can be reliably reduced or suppressed even while traveling on an inclined road surface. , Durability and riding comfort can be improved.

[Brief description of the drawings]

FIG. 1 is a plan view of a main part of an elastic crawler device according to a first embodiment.

FIG. 2 is a diagram showing an arrow AA in FIG. 1;

FIG. 3 is a plan view of a main part of an elastic crawler device according to a second embodiment.

FIG. 4 is a sectional view of FIG. 3;

FIG. 5 is a plan view of a main part of an elastic crawler device according to a third embodiment.

FIG. 6 is a view taken along the line BB of FIG. 5;

FIG. 7 is a plan view of a core employed in an elastic crawler device according to a fourth embodiment.

FIG. 8 is a front view of FIG. 7;

FIG. 9 is a plan view of a main part of an elastic crawler device according to a fourth embodiment.

FIG. 10 is a view taken along the line CC of FIG. 9;

FIG. 11 is a side view of a main part of FIG. 10;

FIG. 12 is a perspective view showing a metal core of the second embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Crawler apparatus 2 Crawler main body 3 Core metal 5 Rail projection 6 Long / short rail projection 8 Step

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B62D 55/08 B62D 55/088 B62D 55/253

Claims (3)

(57) [Claims] A core metal (3) is buried in a crawler body (2) formed in an endless band shape by an elastic material with a space in a band longitudinal direction, and a band width of the crawler body (2). A pair of left and right rail projections (5L) and (5R) which are formed on the inner peripheral side of the crawler body (2) and whose top surface is a rolling portion of the rolling wheel (4) is provided at a central portion in the direction. The rolling portions of the pair of left and right rail projections (5L) and (5R) have long and short rail projections (6L) and (6L), one of which is longer in the belt longitudinal direction than the other.
R), and the long and short rail projections (6L) (6
R), the left and right long and short rail projections (6L) and (6R) serve to prevent the rolling wheel (4) from coming off. ) And the long rail projection (6L) is integrally formed from the metal core (3), and the short rail projection (6R) is made of an elastic material. Outer sides of both sides of 6L) and (6R), rail surfaces (9L) and (9R) of both side flanges (4B) of the wheel (4) are inside of the wings (3B) and (3C) of the cored bar (3). The rail surfaces (9L) and (9R) are formed to be longer and shorter in the longitudinal direction of the band, and the long rail surface (9L) is formed on the short rail protrusion (6R) or the long rail protrusion (6L). The short rail surface (9R) is located outside the long rail protrusion (6L) or the short rail protrusion (6R). Located, long and short rail surface (9L)
(9R) has a long rail surface (9L) and a short rail surface (9R).
An elastic crawler device characterized in that a step (10) is formed on the long and short rail surfaces (9L) and (9R) with a reduced R). 2. The long and short rail projections (6L) and (6R).
The protruding height of the long rail projection (6L) is high and the short rail
The height of the lug (6R) is low,
A step (8) is formed at the height of the protrusion (6L) (6R).
Elastic crawler according to claim 1, wherein the are. 3. The long / short rail projection (6L) (6R) has a groove (3G) formed in the middle of the rail in the longitudinal direction of the long rail projection (6L), and a groove bottom of the groove (3G). (3G1) the claims, characterized in that it is formed a discharge portion of the downwardly inclined towards the core metal wings (3C) (3G2)
3. The elastic crawler device according to 1 or 2 .