JP2004190386A - Twin header - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable efficient work by reducing cutting impossible part or stirring impossible part in a twin header, and to allow one machine to easily respond various work such as mixing stirring work in addition to cutting work. <P>SOLUTION: In the twin header, a casing 3a is extended on the tip side of a mounting flange 2a to be mounted to a bracket disposed in an arm unit of a working vehicle, a pair of lateral shafts 8 and 8 capable of exchangeably mounting rotating drums 4 and 4 are projected from the right and left of the tip section of the casing 3a, and each of the rotating drums 4 and 4 is rotated by a motor 9 attached to the base end of the casing 3a via a chain 7 stored in the casing 3a. The lateral width of the inside of the casing 3a is formed substantially along the chain 7 width. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a twin header used for cutting, ground stirring, and the like, which is mounted on a bracket provided on an arm of a work vehicle.
[0002]
[Prior art]
In civil engineering work, when performing cutting or ground stirring, etc., a twin header attached to the arm of the work vehicle, which inserts into the ground etc. while rotating a pair of rotating drums equipped with a cutting pick and a stirring punch at high speed, It is heavily used.
Conventionally, such twin headers are gear driven, and have a reduction mechanism such as a combination of a plurality of gears for reducing the high-speed rotation of a power source such as a motor and increasing the torque inside the casing, so that the structure is complicated. In addition, the casing needs to have a width sufficient to accommodate the speed reduction mechanism, and requires a skilled worker to assemble the casing, resulting in high costs. Therefore, in the twin header, the interval between the left and right rotating drums needs to be set to be equal to or larger than the width of the casing, and an uncut portion or an unstirable portion occurs in the interval, which hinders efficient work. .
[0003]
However, it has been difficult to reduce the width of the casing in such a gear-driven twin header because of its strength.
On the other hand, the twin header can be used for various purposes, but is often used for mixing and stirring the ground. In this case, in order to stir the soil deeper, it is necessary to lengthen the neck (casing). Therefore, it is not possible to respond simply by replacing the cutting drum of the twin header for cutting with the stirring drum. It took time. That is, not only the casing of the casing is made longer, but also internal parts such as a speed reduction mechanism inside the casing need to be rearranged, so that it is impossible to cope with it at a work site, and work at a factory is required. In addition, since it is necessary to change the design of the inside of the casing, the cost for that has also been a problem.
[0004]
On the other hand, Japanese Patent Application Laid-Open No. Hei 7-11626 discloses a mixing / stirring machine in which a rotator drum provided with mixing / stirring punches provided on the left and right ends of a casing is driven by a chain using the power of a motor provided at the top of the casing. Is presented. In this mixing stirrer, the length of the casing could be easily extended only by a design change to change the length of the chain, and a deep stirring depth could be secured.
[0005]
Further, since this mixing and stirring machine is a chain drive type and does not require a reduction gear, its configuration is simplified and the casing width is narrow. Thereby, the unstirable portion of the ground in the stirring operation could be reduced to some extent.
However, this mixing and stirring machine does not narrow the left and right widths inside the casing so as to be along the width of the chain, and the mixing unstirring portion is not sufficiently reduced. Further, even if the casing is extended, it is necessary to replace the entire device including the motor. Furthermore, this is not intended for cutting, and the rotary drum cannot be replaced with a drilling drum as it is, so that cutting cannot be performed. Therefore, in order to carry out the cutting work, it is necessary to prepare another twin header for the cutting work, the efficiency of the work is not sufficient, the cost is high, and the storage space for storing the working equipment for each purpose is also required. I needed a lot.
[0006]
On the other hand, Japanese Patent Application Laid-Open No. 10-68124 discloses a stirrer in which the mechanism for driving the stirrer is simplified by using a hydraulic motor to extend the neck (casing) and increase the stirring depth. Since this stirrer directly drives the stirrer with a hydraulic motor, the structure is simple, the design is easy, the number of parts is small, and the cost is low. Further, in this stirrer, the interval between the stirrers disposed on the left and right of the tip was narrowed, so that the portion where stirring was impossible could be reduced. However, this stirrer is not intended to cope with a cutting operation like the above-mentioned mixing stirrer, and it was not possible to cope with various operations by one unit.
[0007]
[Problems to be solved by the invention]
The present invention is intended to solve the above-described problems, and minimizes the width of the casing of the twin header to further reduce the non-cuttable portion or the non-stirring portion to achieve efficient work. It is an object of the present invention to make it possible to easily perform various operations with one machine such as a mixing and stirring operation in addition to a cutting operation.
[0008]
[Means for Solving the Problems]
In view of the above, the present invention provides a pair of a pair of casings extending from a tip end of a mounting flange attached to a bracket provided on an arm portion of a work vehicle, and capable of replacing a rotary drum from right and left ends of the casing. In a twin header in which a horizontal axis is protruded and the respective rotary drums are rotated via a power transmission mechanism housed in the casing by a power source attached to a base end portion of the casing, the power transmission mechanism includes: Sprockets respectively provided on the output shaft and the horizontal shaft of the power source, and a chain mounted between the sprockets, and a lateral width inside the casing is formed substantially along the chain width. It is a twin header characterized by that.
[0009]
This simplifies the construction and lowers the assembly cost, and reduces the width of the left and right rotating drums to the minimum that the chain can cover to the left and right inside the casing, thereby reducing the parts that cannot be cut and agitated. Thus, the work can be performed efficiently. In addition, since the rotating drum can be replaced with a different type of drum, various operations can be easily performed.
[0010]
Further, since the twin header is a chain type and has a structure in which a casing portion having power transmission means and a mounting flange provided with a motor are easily detachable, if the casing can be replaced with a different casing, cutting work can be performed. Therefore, it is possible to easily switch between a short casing suitable for the work and a long casing suitable for the stirring work, so that various works can be more easily handled.
[0011]
Further, a plurality of planting bases are provided on the outer surface of each of the rotating drums, and a predetermined cutting pick and a predetermined stirring punch can be exchanged in the plurality of planting bases, so that it can be finer according to the application at a low cost. Be able to respond quickly.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, embodiments of the present invention will be described in detail below with reference to the drawings.
[0013]
1 and 2 are longitudinal sectional views of a chain type twin header 1A, which is a preferred embodiment using the present invention for cutting.
The twin header 1A has a mounting flange 2a mounted on a bracket provided on an arm of a work vehicle (not shown) at an upper portion thereof, a narrow, substantially rectangular parallelepiped casing 3a extending downward from a lower surface of the mounting flange 2a, Left and right rotating drums 4 and 4 removably attached to a pair of horizontal shafts 8 protruding left and right from a lower portion of the casing 3a. The casing 3a is detachably locked to the mounting flange 2a by bolts 15.
[0014]
A hydraulic motor 9 is disposed on a vertical flange 2b provided below the mounting flange 2a alongside the base end side surface of the casing 3a, and is covered by a motor cover 9b. A tip end of an output shaft of the motor 9 is inserted into the casing 3a and a sprocket 5 is provided, and a chain 7 (indicated by a dashed line) as a power transmission means is engaged in the casing 3. A pair of shaft support portions 3c, 3c are provided on the left and right end portions of the casing 3a, and the horizontal shafts 8, 8 penetrating therethrough and projecting horizontally in the left-right direction are provided on the left and right sides. The sprocket 6 is disposed in the casing 3a, and the chain 7 is engaged with the sprocket 6. These constitute a chain-driven power transmission means for transmitting the rotation of the hydraulic motor 9 to the horizontal shafts 8,8. The same applies to the case where a gasoline engine, a diesel engine, or an electric motor is used instead of the hydraulic motor 9. Needless to say, the pair of horizontal shafts 8, 8 may include a case where one shaft rod is made to penetrate the sprocket 6 and protrude left and right from the casing 3a.
[0015]
Left and right receiving seats 8b, 8b are screwed to both ends of the horizontal shafts 8, 8, respectively. Rotary drums 4, 4 are respectively inserted through a plurality of bolts 11 into a plurality of bolt holes 10 provided therein. It is installed so that it can be replaced.
Each of the rotary drums 4 and 4 has a plurality of cutting bases 13b provided on the outer surface thereof, and each of the cutting picks 13 is set therein. By rotating the cutting picks 13 at a high speed by a chain drive, the ground or the like is easily cut. be able to. Incidentally, if the plurality of planting bases are made to have different heights and the cutting angles of the cutting picks 13 are made different as in the present embodiment, various changes can be made to the cutting surface of the rotary drum. Can be given.
[0016]
The rotary drums 4 and 4 are used for cutting work and are detachably fixed to receiving seats 8b and 8b provided at the ends of the horizontal shafts 8 and 8, so that they can be easily removed as shown in FIG. It can be removed. Then, it can be easily replaced with a rotary drum 4 or the like in which a stirring punch 14 for mixing and stirring described later is implanted. Furthermore, by replacing the cutting pick 13 with the stirring punch 14 or replacing the cutting pick 13 with a different shape while keeping the rotary drum 4 as it is, it is possible to respond more finely to the work purpose without taking a storage place at low cost. ing.
[0017]
The twin header 1A is configured to transmit the driving force of the motor 9 to the horizontal shafts 8 and 8 by the simple configuration described above, and the motor 9 is decelerated only by providing a difference in the diameter of the sprockets 5 and 6. It is not necessary to provide a reduction gear because the torque can be increased as well as possible. Accordingly, the configuration inside the casing 3 is simplified, and the width can be reduced to a width that allows the chain 7 to be accommodated and moved inside.
[0018]
Further, since the configuration inside the casing 3a is simplified as described above, the overall weight is reduced, the workability is improved, the number of parts is reduced, the assembling is facilitated, and the need for skilled workers is eliminated, and the manufacturing cost is reduced. Is also realized. And, by narrowing the inner width of the casing 3a to approximately the width of the chain 7, the interval between the rotating drums 4 and 4 can also be narrowed, and the uncuttable portion of the ground being cut becomes smaller. Work efficiency is improved.
[0019]
Further, as shown in FIG. 2, the casing 3a is detachably attached to the mounting flange 2a with the bolts 15, so that when working in a deeper part of the ground, the casing 3a can be detached from the mounting flange 2a. If the casing 3a is replaced with another long type, it can easily cope with deep ground. At that time, the design of the casing 3a and the chain 7 need only be extended, so that the design can be easily changed.
[0020]
In such a case, for example, the sprocket 5 fixed to the motor 9 is replaced with a chain, or the sprocket 5 on which the chain is mounted is provided on the casing 3a side, and the output shaft of the motor 9 is detachably attached to the sprocket 5 and attached to the casing. What is necessary is just to make it a structure easily detachable with a flange. Thus, the casing replacement operation can be easily performed even at the work site.
[0021]
FIG. 3 shows a second preferred embodiment of the present invention in which the present invention is used for mixing and stirring, and shows a longitudinal sectional view of a twin header 1B. The twin header 1B replaces the cutting pick 13 implanted on the rotary drums 4 and 4 for cutting the twin header 1A with a stirring punch 14, and converts the casing 3a and the chain 7 into a longer casing 3b and a chain. 7b. Stirring punches 14 are radially implanted from the central axis direction on a plurality of implanting bases 13b provided on the respective cylindrical outer peripheral surfaces of the rotating drums 4 and 4, respectively.
[0022]
Further, although the stirring punch 14 near the casing 3b is planted perpendicularly to the outer peripheral surface, the space between the left and right rotating drums 4 and 4 is narrow, so that the unstirable portion of the ground due to this is small, and the mixing and stirring is efficient. Work can be performed. Although the stirring punch is not implanted on the flat surface at the end of the rotary drums 4 and 4, the stirring punch 14 implanted on the outer peripheral surface near the end has the installation angle of the hole of the planting base outside. As a result, it is possible to mix and stir the ground in a wide range.
[0023]
By using the twin header 1B provided with such an elongate type casing 3b, a deep portion of the ground can be easily mixed and stirred in the mixing and stirring operation, and the mixing and stirring can be efficiently performed over a wide range by the stirring punch 14 which is extended to the outside. Can be implemented. Further, the twin header 1B and the twin header 1A may be replaced with a rotary drum 4, 4 or a cutting pick 13 or a stirring punch 14 implanted on the rotary drum 4, 4 in addition to the casing. It is possible to easily switch between them simply by changing to a new one.
[0024]
Although the best mode for carrying out the present invention has been sufficiently described in the above description, the present invention is not limited to this.
[0025]
【The invention's effect】
As described above, the twin header according to the present invention minimizes the width of the casing of the twin header, thereby making it possible to perform an efficient cutting / stirring operation by further reducing the uncuttable portion or the unstirable portion. Was. In addition, the casing part can be replaced, so that it is possible to respond to work at various depths, and it is possible to replace the cutting pick or stirring punch implanted in the rotating head, so that it can respond finely It became possible to easily cope with various works at low cost by using one twin header.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing a first preferred embodiment of the present invention.
FIG. 2 is an exploded view of the chain type twin header of FIG.
FIG. 3 is a longitudinal sectional view showing a second preferred embodiment of the present invention.
[Explanation of symbols]
1A, 1B twin header, 2a mounting flange, 2b vertical flange, 3a, 3b casing, 3c shaft support, 4 rotating drum, 5,6 sprocket, 7,7b chain, 8 horizontal axis, 8b receiving seat, 9 motor, 9b Motor cover, 10, 12 bolt hole, 11, 15 bolt, 13 cutting pick, 13b planting base, 14 stirring punch

Claims (3)

A casing extends from the front end of a mounting flange attached to a bracket provided on an arm portion of the work vehicle, and a pair of horizontal shafts protruding from the left and right end portions of the casing are provided so as to be able to replace the rotating drum. A twin-header for rotating each of the rotary drums via a power transmission mechanism housed in the casing by a power source provided in parallel with a base end of the casing, wherein the power transmission mechanism is , And sprockets respectively provided on the output shaft and the horizontal shaft, and a chain mounted between the sprockets, and the casing has an inner left-right width substantially formed along the chain width. A twin header characterized by: The twin header according to claim 1, wherein the casing is replaceable with a different casing. 3. The twin header according to claim 1, wherein a plurality of planting bases are provided on the outer surface of each of the rotating drums, and a predetermined cutting pick and a predetermined stirring punch can be replaced in the plurality of planting bases. 4.

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