JPH0649469B2 - Rubber crawler type traveling device for carrier - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] In the present invention, metal cores are provided in parallel in the longitudinal direction of a rubber crawler at substantially equal intervals, and the metal cores are provided with rolling wheels for supporting a vehicle body. Make sure that both ends are placed on the upper surface of the pair of left and right cored bar projections, and that the center part is inserted between the cored bar projections.
Formed in a shape where the central part has a larger diameter than the end parts,
The present invention relates to a rubber crawler type traveling device for a transport vehicle in which a pair of the above-mentioned rolling wheels are arranged side by side in the front and rear directions near a crawler drive sprocket and a crawler tension idler, respectively.

[Conventional technology]

In the crawler type traveling device having the above-mentioned configuration, since the rolling wheel rolls on the upper surface of the cored bar projection, it is different from the outer ring rolling type in which the rolling wheel rolls laterally outside the cored bar projection. In addition, there is an advantage that the rubber crawler does not damage the rubber surface where it rolls and the durability of the rubber crawler is excellent.

Conventionally, in the rubber crawler traveling device for a transport vehicle as described above, with respect to the arrangement of the rolling wheels, the center of gravity position of the vehicle body that largely moves back and forth between empty and loaded, and the correlation with the arrangement of the cored bar protrusions There was no special consideration.

[Problems to be solved by the invention]

However, on the sprocket side and idler side, the pitch (P ₁ ) of the pair of rolling wheels and the upper surface pitch (P ₂ ) of the cored bar projections are almost equal, and as the vehicle travels, the pair of rolling wheels simultaneously become larger. There was a drawback that it dropped into the gap between them and the running vibration of the car body became severe.

Even in the case of P ₁ ≠ P ₂ , in one or both of the empty load and the loaded load, the center of gravity of the vehicle should be located on the sprocket side or the idler side of the pair of rolling wheels closer to the center in the front-rear direction. However, there is a drawback that the one on the sprocket side or on the idler side of the pair of wheels falls into the gap between the cores, and the traveling vibration of the vehicle body becomes severe.

An object of the present invention is to improve the arrangement of the rolling wheels so as to suppress or eliminate the traveling vibration caused by the fall of the rolling wheel between the core metal projections.

[Means for solving problems]

A characteristic configuration of the present invention is that a pair of rolling wheels arranged close to and near a crawler drive sprocket and an idler for tensioning a crawler are arranged in the front-rear direction, respectively, in an empty state between the rolling wheels. Both the center of gravity of the vehicle (G ₁ ) and the center of gravity of the vehicle in the loaded state (G ₂ ) are arranged so that each pair of the rolling wheels has a pair of rolling wheel pitches (P ₁ ) on which the rubber crawler has a metal core protrusion. the relative arrangement such that differs from the integral multiple of the rolling wheel mounting upper surface of the pitch (P _2), further, the pair of track roller (10a), (10
b) Pitch (P ₁ ) and the core bar protrusion (9) top surface pitch (P ₂ )
And the length of the upper surface of the cored bar projection and the gap between the upper surfaces of the cored bar projections are expressed by the following equations (1) to (3) P ₁ > n ₁ × P ₂ + K (1) P ₁ <n ₂ × P ₂ …… (2) P ₂ −K> K …… (3) (where n ₁ is an integer, n ₂ is an integer of 2 or more, K is between adjacent core metal protrusions in the crawler length direction) The width of the gap) is satisfied, and the action and effect are as follows.

[Operation] In other words, by making the pitch (P ₁ ) of the pair of rolling wheels different from the pitch (P ₂ ) of the upper surface of the cored bar in each of the front and rear,
It is possible to prevent a pair of rolling wheels from largely falling into the gap between the cored bar projections at the same time during running, and to suppress the drop of the other when it hits the cored bar projections, which can be desirably eliminated.

By the way, in order to completely eliminate the fall of the pair of rolling wheels, the pitch of the pair of rolling wheels (P ₁ ) and the pitch of the upper surface of the cored bar protrusion
The correlation of (P ₂ ), and the length of the upper surface of the cored bar projection and the gap between the top surfaces of the cored bar projections are calculated by the following equations (1) to (3) P ₁ > n ₁ × P ₂ + K (1) P ₁ <n ₂ × P ₂ ...... (2) P ₂ −K> K …… (3) (However, n ₁ is an integer, n ₂ is an integer of 2 or more, K is the core adjacent to each other in the crawler length direction. The width of the gap between the gold protrusions) should be satisfied.

In addition, the vehicle body center of gravity (G
_{Since 1} ) and (G ₂ ) are positioned between the pair of rolling wheels that are closer to the center in the front-rear direction, the pair of rolling wheels that are closer to the center in the front-rear direction are mounted on the cored bar protrusions. Further, even if the other is floated between the cored bar protrusions, the phenomenon that the rolling wheel floated by gravity falls between the cored bar protrusions can be completely eliminated.

〔The invention's effect〕

As a result, a rubber crawler with excellent durability in which the rolling wheels roll on the top surface of the cored bar protrusions, and it is sufficient for the pair of front and rear rolling wheels to drop significantly between the cored bar protrusions as the vehicle travels. It has become possible to provide a rubber crawler type transport vehicle that can be suppressed or completely eliminated, and that has little running vibration and little driving fatigue.

〔Example〕

 Next, examples will be shown.

As shown in FIG. 3, the platform (2) attached to the rubber crawler type traveling device (1) is provided with the loading platform (3), the driving section (4) and the boarding operation section arranged side by side behind it. , A small carrier suitable for running on rough terrain is formed.

As shown in FIG. 1 and FIG. 2, a metal crawler (7) wound around a crawler drive sprocket (5) and a crawler tension idler (6) is embedded with metal cores (8) at substantially equal intervals. The cored bars (8) are provided with a pair of left and right cored bar projections (9) so as to project inside the rubber crawler (7).

The vehicle body supporting rolling wheels (10a), (10b), (10) c acting on the ground side of the rubber crawler (7) and the upper rolling wheel (11) acting on the upper side are provided. Three of the supporting wheels (10a),
Place (10b) and (10c) near the sprocket (5) and two (10
The a) and (10b) are arranged close to each other near the idler (6).

Body support wheels (10a), (10b), (10c) each formed in a shape in which the central portion has a larger diameter than both end portions, and a spindle (13) attached to the track frame (12) Mounted rotatably with bearings (14) on both ends of the wheels (10a), (10b), (10c) on the top surface of the cored bar protrusion (9), and the center part on the left and right cored bar protrusions. Insert it between (9) and the rubber crawler (7)
It is designed not to come off from (10a), (10b), and (10c).

A pair of front and rear wheels (10a), (10b) near the sprocket (5) and idler (6), respectively, which are closer to the center in the front-rear direction
(10b) Each of them is arranged such that the vehicle center of gravity (G ₁ ) in the empty state and the vehicle center of gravity (G ₂ ) in the maximum loaded state are located between the wheels (10b). Also, a pair of wheels (10a),
(10b) It is preferable that the two wheels (10a) and (10b) have a pitch (P ₁ ) different from an integer multiple of the pitch (P ₂ ) of the upper surface of the cored bar protrusion (9). Correlation of pitches (P ₁ ) and (P ₂ ), and
The length of the top surface of the cored bar protrusion and the gap between the top surface of the cored bar protrusion are
Arranged so as to satisfy (1) to (3), and core metal protrusions associated with traveling
It is possible to suppress or eliminate traveling vibration caused by the fall of the wheels (10a) and (10b) into the space (9).

P ₁ > n ₁ × P ₂ + K …… (1) P ₁ <n ₂ × P ₂ …… (2) P ₂ −K> K …… (3) where n ₁ is an integer and n ₂ is 2 or more And K is the width of the gap between adjacent core metal projections (9) in the crawler length direction.

[Another embodiment]

 Next, another embodiment will be described.

Rollers (10a), (10b) acting on the ground side of the rubber crawler (7)
It is enough that the number of wheels is 4 or more.
The shape and mounting structure of a) and (10b) can be appropriately modified.

Further, the core metal protrusion (9) can be appropriately deformed in shape, pitch (P ₂ ), and so on.

Further, the truck can be of the dump type, crane type, rear bed type, and various other types.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a side view of an essential part, FIG. 2 is a sectional view of an essential part, and FIG. 3 is an overall side view. (5) …… sprocket, (6) …… idler, (7) …… rubber crawler, (8) …… core bar, (9) …… core bar protrusion, (10a),
(10b) …… Roller wheel, (G ₁ ) ， (G ₂ ) …… Center of gravity, (P ₁ ) ， (P ₂ ) ……
pitch.

Claims (1)

[Claims] 1. Rolling wheels (10a), (10b) for supporting a vehicle body, wherein metal cores (8) are arranged in parallel in the longitudinal direction of a rubber crawler (7) at substantially equal intervals.
Is such that both end portions are placed on the upper surfaces of the pair of left and right cored bar protrusions (9) provided on the cored bar (8), and both cored bar protrusions
The central part is formed to have a larger diameter than both end parts so that the central part can be inserted between (9), and it is provided near the crawler drive sprocket (5) and the crawler tension idler (6), respectively. , A pair of said rolling wheels (10a), (10b) arranged side by side in the front-rear direction, in the pair of said rolling wheels (10a), (10b), the one near the center in the front-rear direction (10b) Vehicle center of gravity (G ₁ ) in the empty state and vehicle center of gravity in the loaded state between the wheels (10b)
(G ₂ ) so that both of them are positioned, and the pair of rolling wheels (1
0a) and (10b) are arranged so that the pitch (P ₁ ) of both wheels (10a) and (10b) is different from the integral multiple of the pitch (P ₂ ) of the upper surface of the cored bar protrusion (9). And further, the pair of rolling wheels (10a),
The pitch (P ₁ ) of (10b) and the pitch (P ₁ ) of the upper surface of the cored bar protrusion (9) (P
₂ ), and the relationship between the length of the upper surface of the cored bar projection and the gap between the top surfaces of the cored bar projections are expressed by the following equations (1) to (3) P ₁ > n ₁ × P ₂ + K (1) P ₁ < n ₂ × P ₂ …… (2) P ₂ −K> K …… (3) (where n ₁ is an integer, n ₂ is an integer of 2 or more, K is a core bar protrusion adjacent to each other in the crawler length direction) A rubber crawler type traveling device for a carrier that fills the gap between the two).