JP2006028904A - Twin header for work vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a twin header which eliminates an uncuttable section between a pair of cutting drums, can carry out cutting work by using the entire width of the cutting drums, prevents hindrance on cutting by a casing, to thereby carry out deeper cutting work. <P>SOLUTION: According to the structure of the twin header, a pair of the cutting drums 15, 15 are disposed at a distal end of a base body 11, and a plurality of cutters 17 are arranged between the cutting drums so as to cover the distal end of the casing. Then a power transfer mechanism 24 is formed of a chain-type one, and the cutters 17 are arranged on a chain 16 of the power transfer mechanism 24. Further each cutter 17 employs the same cutting pick 27 as that of the cutting drum 15, and the cutters 17 thus formed are attached to the outside of the chain 16. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a twin header for a working vehicle that is attached to the tip of an arm portion of a working vehicle such as a backhoe and is used for ground cutting and suspension in civil engineering work, agitation for ground improvement, and the like.

  When performing ground cutting or ground improvement in civil engineering work, a work vehicle in which a twin header as shown in, for example, Japanese Patent No. 2984703 is attached to the tip of an arm part is used. As shown in FIG. 7, the twin header includes a base 1 that extends from a bracket provided on the front end side of the arm portion of the working vehicle, and a drive motor 2 that is accommodated and disposed on the base end side of the base 1. The drum shaft 3 is disposed in the lateral direction at the front end portion, and a pair of cutting drums 4 and 4 are mounted on the projecting ends of both sides of the base 1 of the drum shaft 3.

Then, the rotation of the cutting drums 4 and 4 by the chain 8 suspended on the driving sprocket 6 and the driven sprocket 7 disposed on the rotating shaft 5 and the drum shaft 3 of the driving motor 2 causes the outer surface of the cutting drums 4 and 4 to be rotated. Cutting and stirring operations are performed with the plurality of cutting picks 9 provided.
Japanese Patent No. 2984703

  However, since the tip end portion of the substrate 1 is located between the conventional cutting drums 4 and 4, in the cutting operation, the uncuttable portion W1 is left as shown in FIG. For this reason, it is necessary to shift the twin headers by a half pitch in the horizontal direction and to perform a post-process for cutting the uncut portion each time, and the entire construction is inefficient and requires a large number of work steps. Furthermore, as the cutting drums 4 and 4 continue to cut, the tip of the base body 1 abuts against the ground and hinders further cutting, so the cutting depth is between the cutting pick 3 and the tip of the base body 1. It was limited to a small amount of the depth L1 corresponding to the distance.

  The present invention is intended to solve the above-mentioned problems, eliminates the non-cuttable portion between a pair of cutting drums, enables a cutting operation over the entire width of the cutting drum at once, and has no depth limitation. The present invention provides a twin header for a work vehicle that can perform a cutting operation.

  Therefore, the present invention projects a drive shaft driven by a drive motor at a base end of a base attached to a tip of an arm part installed in a work vehicle, and projects from both sides of the base at the front end of the base. A driven shaft having a pair of cutting drums attached to both ends is disposed, and a chain is suspended from the drive sprocket and the driven sprocket respectively disposed substantially at the center in the width direction of the drive shaft and the driven shaft. In the twin header for a work vehicle for rotating the cutting drum, at least the drive sprocket and the chain suspension of the driven sprocket are disposed so as to be exposed from the base, and the cutting drums of the two cutting drums are disposed along the outer side of the chain. A ring-shaped cutting cutter disposed between them is provided.

  A cutting operation is performed together with a cutting cutter provided by filling a gap between the bases existing between the pair of cutting drums. Thereby, an uncut portion is not left between the cutting drums, and a cutting operation having a length between the outer ends of the pair of cutting drums can be performed at a time. Further, since the post-process which has conventionally been required for the uncut portion is not required, the construction work can be efficiently performed in a short time. Furthermore, since the cutting cutter is provided so as to cover the tip of the base, there is no depth limitation during cutting, and an efficient operation can be performed at a time.

  Since the cutting cutter is provided by using a chain which is a power transmission mechanism component, further downsizing and cost reduction can be achieved.

  According to the twin header for a work vehicle of the present invention, the cutting cutter works on the uncut portion of the base that is left between the pair of cutting drums provided at both ends of the conventional drive shaft. The cutting of the length between the outer ends of each can be performed in a single work process. Moreover, since the post-process conventionally required for the uncut portion is not necessary, the work period can be greatly shortened and the economic efficiency can be improved. Furthermore, since the cutting cutter is provided so as to cover the tip portion of the base body, it is possible to efficiently perform a cutting operation without any depth restriction at a time, and the working efficiency is remarkably improved.

  In addition, since the chain-type power transmission mechanism covers the operation of the cutting drum and cutting cutter, the number of assembly steps and the number of parts can be reduced, and further downsizing and cost reduction can be achieved. In addition, since the chain and sprocket are visibly disposed outside the base body, maintenance of the power transmission mechanism parts as well as the cutting cutter can be easily performed from the outside. Further, by providing the cutting cutter using a chain which is a power transmission mechanism component, it is possible to further reduce the size and cost.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, a preferred embodiment of the invention will be described with reference to the drawings.

  1 to 3, a twin header 1 for a work vehicle has a vertically long base body 11 that is attached to a front end of an arm portion of the work vehicle via a bracket, and a drive motor is provided on an upper side of the base body 11. 12 is attached. A pair of cutting drums 15 and 15 are removably attached to both ends of a drum shaft 14 supported via bearings 13 and 13 on hubs 11a and 11a provided so as to protrude on both sides of the tip of the base 11.

  Further, an output shaft 20 of the drive motor 12 is supported in parallel with the drum shaft 14 using a bearing 21 on the base 11, and a pair of left and right drive sprockets 22 and 22 are fixed to the output shaft 20. A pair of left and right driven sprockets 23 and 23 are fixed to the drum shaft 14. Two chains 16, 16 are suspended between the sprockets 22, 22, 23, 23. The chains 16, 16, the drum shaft 14, the output shaft 20, the drive sprockets 22, 22, and the driven sprockets 23, 23 A double chain type power transmission mechanism 24 is configured.

  Further, the driven sprockets 23, 23 are disposed between the front end portion of the base body 11 and the cutting drums 15, 15, and the outer peripheral teeth thereof are located outside the front end portion of the base body 11. For this reason, the chains 16 and 16 that mesh with the outer peripheral teeth of the driven sprockets 23 and 23 are provided so as to cover the outside of the front end portion of the base 11, and the driven sprockets 23 and 23 are similar to the cutting drums 15 and 15. It is preferable to have a diameter as described above.

  As shown in FIG. 4, each chain 16 is configured in an endless manner by alternately connecting a plurality of link chains 16 a and shackles 16 b, and between the shackles 16 b and 16 b positioned in the same phase on both sides of the base 11. A chain bar 25 having a T-shaped cross section is erected, and two cutting cutters 17 are projected from the outer surface of the chain bar 25.

  As shown in FIG. 2, each of the cutting drums 15 closes the outer edge of the cylindrical body 15 a on the outer side of the outer end of the drum shaft 14, and the cylindrical body 15 a that accommodates the drum shaft 14 on the central axis. It is formed in a bottomed cylindrical shape with the outer plate 15b. A plurality of cutting picks 27 held by a pick holder 26 are projected on the outer peripheral surface of the cylindrical body 15a and the outer surface of the outer plate 15b, and the cutting cutter 17 provided on the chains 16 and 16 includes the picks. The thing of the same structure which combined the holder 26 and the cutting pick 27 is used.

  In particular, the cutting cutters 17 are arranged in two rows in the vertical direction, and are inclined outward in consideration of cutting efficiency and the like. Further, it is disposed at substantially the same pitch as the cutting picks 27 arranged in the cylindrical body 15a of the cutting drum 15 in the drum axial direction so as to fill a space formed between the cutting drums 15 and 15.

  1 and 2, the chain bar 25 serving as a mounting plate for the cutting cutter 17 is located on the same circumference D1 as the cylindrical body 15a of the cutting drum 15 at the tip of the base 11, and the chain The tips of the cutting cutter 17 on the bar 25 and the cutting pick 27 on the cylindrical body 15a are located on the same circumference D2. Therefore, the cutting cutter 17 and the cutting pick 27 are arranged in the same phase, and are set so as to rotate integrally by driving the drive motor 12 and perform the same cutting operation.

  In the twin header 10 of this embodiment configured as described above, when the drive motor 12 is turned on in FIGS. 1 to 3, the output shaft 20 and the drive sprocket 22 rotate integrally, and the chains 16, 16 The driven sprocket 23 and the cutting drums 15, 15 rotate integrally through the cutting cutter 17 of the chains 16, 16 and the cutting picks 27 of the cutting drums 15, 15 rotate in synchronism with each other. The cutting of the length W2 (see FIG. 6) extending between the outer ends can be performed in a single work process.

  Therefore, according to the twin header 10 of the present embodiment example, the conventional uncut portion is not left between the cutting drums 15 and 15, so that the post-process required for the uncut portion becomes unnecessary, and the work The construction period can be greatly shortened and the economic efficiency can be improved. Further, since the tip of the base 11 is covered with the cutting cutter 17 so that the tip does not hit the ground, the cutting operation is performed once at a depth L2 (see FIG. 6) within the range where the arm of the base machine can reach. Can be performed efficiently, and the work efficiency is greatly improved.

  Further, since the operation of the cutting drums 15 and 15 and the cutting cutter 17 is handled by the chain-type power transmission mechanism 24, the number of assembling steps and the number of parts can be reduced, and the twin header 10 can be made compact and low in cost. In addition, since the chain 16 and the driven sprocket 23 are visibly disposed outside the casing 11, not only the cutting cutter 17 but also the components of the power transmission mechanism 24 can be easily maintained. Furthermore, since the cutting cutter 17 is provided using the chain 16 that is a component part of the power transmission mechanism 24, further reduction in size and cost can be achieved.

  In the above embodiment, the ground cutting has been described as an example. However, the twin header of the present invention can be used for agitation and the like in ground improvement. Further, the cutting picks of the cutting cutter and the cutting drum may have different shapes from the above-described embodiment, and their arrangement is also arbitrary. Examples of power transmission mechanisms other than the chain type include a belt type and a gear type. In addition, as exemplified in the above-described embodiment, it is desirable that the power transmission mechanism be used both as a cutting drum and a cutting cutter in terms of production and cost, but each has a dedicated power source and a power transmission mechanism. It does not prevent you from holding it.

It is a front view of the twin header which shows one example of this invention. It is a front longitudinal cross-sectional view of the twin header which shows one example of this invention. It is a side view of FIG. It is the figure which looked at the connection state of the chain and chain bar which show one example of this invention from the inner side. It is a perspective view of the chain bar which shows one example of the present invention. It is a figure which shows the cutting state which shows one example of this invention. It is a front longitudinal cross-sectional view of the conventional twin header. It is a figure which shows the cutting state using the conventional twin header.

Explanation of symbols

10 Twin Header, 11 Base, 12 Drive Motor, 14 Drum Shaft, 15 Cutting Drum, 15a Cylindrical Body, 15b Outer Plate, 16 Chain, 16a Link Chain, 16b Shackle, 17 Cutting Cutter, 20 Output Shaft, 22 Drive Sprocket, 23 Drive sprocket, 24 Power transmission mechanism, 25 Chain bar, 26 Pick holder, 27 Cutting pick, D1, D2 circumference, W1 Uncuttable part, W2 Length between outer ends of cutting drums 15, 15 L1 Conventional twin header L2 Cutting depth using the twin header of this embodiment

Claims (2)

  A drive shaft driven by a drive motor at the base end of the base attached to the tip of the arm part installed in the work vehicle, and a pair of cuttings at both ends projecting from both side parts of the base at the tip of the base A driven shaft to which each drum is attached is arranged, and a chain is suspended between the driving sprocket and the driven sprocket respectively arranged at substantially the center in the width direction of the driving shaft and the driven shaft, and the pair of cutting drums are rotated. In the twin header for a work vehicle, at least the drive sprocket and the chain suspension portion of the driven sprocket are disposed so as to be exposed from the base, and the ring is disposed between the two cutting drums along the outer portion of the chain. A twin header for a work vehicle, characterized in that a cutting cutter is provided. 2. The twin header for a work vehicle according to claim 1, wherein the drive sprocket and the driven sprocket are of a double chain type in which a chain is suspended at both ends, and a cutting pick is protruded from a chain bar installed between the two chains.

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