JP4023942B2 - Multi-axis auger excavator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a multi-axis auger excavator used for pile driving work for foundation work.
[0002]
[Prior art]
In a multi-axis auger excavator, the distance between the axes of each auger screw may be changed depending on the construction conditions. In this case, since it is too expensive to use a multi-axis auger excavator with a different inter-axis distance each time, for example, as shown in Japanese Utility Model Publication No. 52-131805, the left and right auger drive devices One of the pair of auger screw drive units can be moved laterally, or as shown in JP-A-8-4011, the auger drive device is provided with two auger mounting shafts and a drive motor. In some cases, the gear of the auger mounting shaft is meshed with the gear of the output shaft of the drive motor, each auger mounting shaft can be turned, and the interval between the auger mounting shafts can be changed.
[0003]
[Problems to be solved by the invention]
However, since both structures require a complicated and robust structure, assembly and disassembly operations require a great deal of time and effort.
[0004]
Accordingly, an object of the present invention is to provide a multi-axis auger excavator in which the inter-axis distance of the auger screw can be easily changed.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a multi-axis auger in which a plurality of auger mounting shafts and a drive motor are arranged in an auger drive device, and a gear of an auger mounting shaft is meshed with a gear of an output shaft of the drive motor. In the excavator, a first auger mounting shaft row in which gears are fixed to a plurality of auger mounting shafts and meshed with the auger driving device, and the first auger mounting shaft row is connected to a plurality of auger mounting shafts. The gears of the first auger mounting shaft train and the gears of the second auger mounting shaft train are arranged side by side with a second auger mounting shaft train in which gears having different diameters from the gears are fixed and meshed with each other. Is meshed with the gear of the output shaft.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment in which the present invention is applied to a three-axis auger excavator will be described with reference to the drawings. The auger drive device 3 provided on the leader 2 of the excavator 1 so as to be movable up and down has two drive motors 4 and 4 on the left and right, and a first auger mounting shaft on the leader 2 side between the drive motors 4 and 4. The row 5 and the second auger mounting shaft row 6 are juxtaposed on the front surface thereof.
[0007]
The drive motors 4 and 4 are synchronously rotated with the same configuration, and the output shaft 41 of each drive motor 4 has a first small gear 42 on the upper part and a little lower than the first gear 42 on the lower part. A large-diameter second gear 43 is fixed.
[0008]
In the first auger mounting shaft row 5, gears 54 a, 54 b, 54 c having the same diameter are fixed to the outer periphery of the three auger mounting shafts 51, 52, 53, and the auger mounting shafts 51, 52, 53 are arranged in parallel. The gears 54a and 54b and the gears 54b and 54c are engaged with each other, and the gears 54a and 54c at both ends are engaged with the first gears 42 of the output shafts 41, respectively.
[0009]
The second auger mounting shaft row 6 has gears 64a, 64b, 64c larger in diameter than the gear 54 and fixed to the outer periphery of the three auger mounting shafts 61, 62, 63, respectively. 62 and 63 are arranged in parallel, and the gear 64a and the gear 64b and the gear 64b and the gear 64c are meshed with each other, and the gears 64a and 64c at both ends mesh with the second gear 43 of the output shaft 41, respectively. ing.
[0010]
With this configuration, the distance between the auger mounting shafts 51, 52, and 53 of the first auger mounting shaft row 5 is the same as the distance between the auger mounting shafts 61, 62, and 63 of the second auger mounting shaft row 6. Since it is narrower, when construction is performed using the first auger mounting shaft train 5 having a short inter-axis distance, an auger screw 55 that matches the pitch of the first auger mounting shaft train 5 is used for each auger mounting shaft 51, 52, 53. When the construction is performed using the second auger mounting shaft train 6 having a large inter-axis distance, an auger screw 65 matched to the pitch of the second auger mounting shaft train 6 is used for each auger mounting shaft 61, 62, 63. Since it is only necessary to attach to, the distance between the axes can be easily changed.
[0011]
In the above-described embodiment, the description has been given with the three-axis auger excavator. However, the number of axes is not limited thereto, and may be two axes or four or more axes. In the case of three or more axes, the gears of the intermediate auger mounting shafts may not have the same diameter as the gears of the auger mounting shafts at both ends. Further, the first auger mounting shaft train 5 is engaged with the first gear 42 of the output shaft 41 of the drive motor 4, and the second auger mounting shaft train 6 is engaged with the second gear 43. Both auger mounting shaft rows may be meshed with one gear 42.
[0012]
【The invention's effect】
As described above, the multi-axis auger excavator of the present invention includes a first auger mounting shaft train in which gears are fixed to a plurality of auger mounting shafts and meshed with the auger driving device, and a plurality of auger mounting shafts. A gear having a diameter different from that of the gear of the first auger mounting shaft row is fixed to the auger mounting shaft, and a second auger mounting shaft row meshing with each gear is arranged in parallel. Since the gear of the second auger mounting shaft train is meshed with the gear of the output shaft of the drive motor, the distance between the auger mounting shafts of the first auger mounting shaft train and the auger mounting shaft distance of the second auger mounting shaft train However, since the auger screw matched to the pitch of the respective auger mounting shafts only needs to be mounted on each auger mounting shaft, the distance between the axes can be easily changed with a simple configuration.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view taken along the line II in FIG.
FIG. 2 is a longitudinal sectional view of an auger drive device showing an embodiment of the present invention.
FIG. 3 is a side view of the multi-axis auger excavator.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Excavator, 2 ... Leader, 3 ... Auger drive device, 4 ... Drive motor, 41 ... Output shaft of drive motor 4, 42 ... First gear of drive motor 4, 43 ... Second gear of drive motor 4, 5 ... First auger mounting axis train, 51, 52, 53... First auger mounting axis train 5 auger mounting shaft, 54a, 54b, 54c. 61, 62, 63 ... auger mounting shaft of the second auger mounting shaft row 6, 64a, 64b, 64c ... gears of the second auger mounting shaft row 5, 55, 65 ... auger screw

Claims (1)

In a multi-axis auger excavator in which a plurality of auger mounting shafts and a drive motor are disposed in an auger drive device, and a gear of an auger mounting shaft is meshed with a gear of an output shaft of the drive motor, the auger drive device includes a plurality of auger drive shafts. A first auger mounting shaft train in which gears are fixed to the auger mounting shaft and meshed with each other, and a gear having a diameter different from that of the first auger mounting shaft train is fixed to a plurality of auger mounting shafts. A second auger mounting shaft train meshed with each gear, and the gears of the first auger mounting shaft train and the second auger mounting shaft train meshed with the output shaft gear. Features a multi-axis auger excavator.

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