JPH0449396A - Concentric biaxial auger machine - Google Patents

Abstract

PURPOSE:To miniaturize a machine and reduce cost by fitting an external casing with a bit at the external main shaft of an auger machine and an auger screw with a bit at the internal main shaft respectively, and rotating the two to the opposite directions with each other by one driving motor. CONSTITUTION:An external casing 13 with a front edge bit is fitted at the external main shaft 5 of an auger machine. Next, an auger screw 11 with a front edge bit is fitted at the internal main shaft 6. And the external main shaft 5 and the internal main shaft 6 are rotated in this state to both normal and reversal directions by the driving motor 3 to strike piles while moving up and down the main body case 1 and the internal main shaft 6 by a lifting means 12 along the guide of the base body. And the torque of the drive motor 3 is transmitted to rotary shaft 3a, key 3b, driving shaft 2, gear 7, gears 9, 10, external main shaft 5, tube shaft 4, internal main shaft 6, external casing 13, and auger screw 11. These are simultaneously reversely rotated against each other and a specified operation can be performed.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a concentric two-shaft auger machine.

Conventional technology: A conventional earth ocher machine rotates a main shaft using both deceleration shafts using a hydraulic motor or an electric motor (hereinafter referred to as a drive motor), and excavates and excavates the ground using a drill attached to the tip of the main shaft. Improvements are being made. These excavation methods include single-shaft, twin-shaft, multi-shaft, and concentric twin-shaft.

<Problems to be Solved by the Invention> However, in all of the above conventional cases, one drive motor is used for one shaft. Therefore, drive motors are required depending on the number of axes, which increases the size and weight of the equipment.
The number of drive equipment that drives the drive motor has also increased and become more complex.

Therefore, an object of the present invention is to provide a drive motor-mortar type concentric two-shaft auger machine.

In the present invention, two shafts, an outer main shaft and a middle main shaft, which are arranged concentrically, are rotated by a drive motor, and the middle main shaft is movable up and down with respect to the outer main shaft.

<Means for Solving the Problems> As shown in Figures 1, 2, 3, and 4, the means for solving the problems according to the present invention includes a main body case 1 that is attached to the machine base A so that it can be raised and lowered, and a rotatable structure that is attached to the main body case 1. A drive shaft 2 bearing bearings 2a and 2b, a drive motor 3 for rotationally driving the drive shaft 2, and a bearing 4a parallel to the drive shaft 2 and rotatably mounted on the main body case 1.

4b, and a cylindrical outer main shaft 5 which is arranged concentrically below the tube shaft 4 and rotatably supported by the main body case 1.

There is a middle main shaft 6 which is fitted concentrically into the tube shaft 4 and the outer main shaft 5. The inner main shaft 6 is movable up and down and can be rotated separately, the outer main shaft gear 7 is provided to interlock the drive shaft 2 and the outer main shaft 5, and the drive shaft 2 and the tube shaft 4 are interlocked. The outer main shaft 5 and the tube shaft 4 are configured to be concentric and rotate in opposite directions.

<Function> In the above problem solving means, the outer casing 13 with a tip bit or a steel pipe pile is attached to the outer main shaft 5 by the ready-made pile burying method, the cast-in-place pile method, the steel pipe pile method, etc., and the inner main shaft 6 is equipped with a tip bit. Attach the orcas screw 11 and drive the drive motor 3 in this state.

At this time, the rotational force of the drive motor 3 is the rotating shaft 3a→
Drive shaft 2 - gear 7, gears 9 and 10 - outer main shaft 5, tube shaft 4 and middle main shaft 6 -> outer casing 13 and orcas screw 11 are transmitted, and these rotate in opposite directions at the same time. A predetermined work is performed.

<Example> Hereinafter, the present invention will be described in detail. The concentric two-shaft auger machine of the present invention includes a main body case 1 which is attached to a machine base A so as to be movable up and down, and bearings 2a and 2b rotatably attached to the main body case L. a drive shaft 2, a drive motor 3 that rotationally drives the drive shaft 2, a tube shaft 4 parallel to the drive shaft 2 and rotatably supported on the main body case 1, and a tube shaft 4 of the tube shaft 4. It is provided with a cylindrical outer main shaft 5 which is arranged concentrically on the lower side and is rotatably supported by the main body case 1.

A middle main shaft 6 is fitted concentrically into the front pipe shaft 4 and the outer main shaft 5, and is fitted with a key 6a (or spline) so that it can move up and down and rotate integrally with the pipe shaft 4. In relation to the outer main shaft 5, there is provided an inner main shaft 6 which can be raised and lowered and which can be rotated separately.

Further, a bolt 5a is engaged with the teeth 2A of the drive shaft 2 and attached to the outer main shaft 5 so that the drive shaft 2 and the outer main shaft 5 are interlocked.
an outer main shaft gear 7 fixed to the outer main shaft gear 7, a first tube shaft gear 9 which is engaged with the teeth 5A of the drive shaft 2 and is bearing 9a on the intermediate shaft 8 so as to interlock the drive 1112 and the tube shaft 4; A second tube shaft gear 10 is engaged with the second tube shaft gear 9 and integrally fixed to the tube shaft 4.

Furthermore, the outer main shaft 5 and the tube shaft 4 are concentric and configured to rotate in opposite directions.

6b is a lower end connector for the middle main shaft 6 for the orcas screw 11, and 6c is an upper end connector for the lifting means 12 for the middle main shaft 6.

Next, to explain the function, in the prefabricated pile burying method, the trench casting method, the steel pipe pile method, etc., the outer casing 13 with a tip bit or a steel pipe pile is attached to the outer main shaft 5, and the inner spindle 6 has a tip bit attached to the outer casing 13 or a steel pipe pile. The auger screw 11 is attached, and in this state, the drive motor 3 is driven to rotate the outer main shaft 5 and the inner main shaft 6 in the forward and reverse directions, and the main body case 1 and The pile construction method is carried out while raising and lowering the middle main shaft 6.

At this time, the rotational force of the drive motor 3 is the rotating shaft 3a→
Key 3b-drive shaft 2-gear 7, gear 91〇-outer main shaft 5
This is transmitted from the tube shaft 4 and the middle main shaft 6 to the outer coushing 13 and the orcas screw 11, which simultaneously rotate in opposite directions to perform a predetermined operation.

It should be noted that the present invention is not limited to the above embodiments, and it goes without saying that many modifications and changes can be made to the above embodiments within the scope of the present invention.

<Effects of the Invention> As is clear from the above description, according to the present invention, it is possible to drive two axes with one drive motor, and the earth auger machine can be downsized and the increase in weight can be reduced. Even when the present invention is applied to conventional excavating machines, it can be used with or without some modification, and has the excellent effect of greatly reducing expenses and equipment costs.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view (sectional view taken along the line B-B in Fig. 2) showing a first embodiment of the concentric two-shaft auger machine of the present invention, Fig. 2 is a plan view, and Fig. 3 is a side view. , FIG. 4 is a sectional view taken along the line CC in FIG. 2. A: Machine base, 1: Main body case, 2. Drive shaft, 3. Drive motor, 4. Tube shaft, 5: Outer main shaft, 6. Middle main shaft, 7: Outer main shaft gear, 8: Intermediate shaft, 9: First tube. Shaft gear, 10: second tube shaft gear.

Claims (1)

[Scope of Claims] A main body case that is attached to the machine base so that it can be raised and lowered, a drive shaft that is rotatably supported by the main body case, a drive motor that rotationally drives the drive shaft, and a main body parallel to the drive shaft. A tube shaft rotatably supported by a case; a cylindrical outer main shaft arranged concentrically below the tube shaft and rotatably supported by the main body case; an inner main shaft fitted inside the tube shaft, which is fitted so as to be able to move up and down and rotate together with the tube shaft, and which is able to move up and down and rotate separately relative to the outer main shaft; It consists of an outer main shaft gear provided to interlock the drive shaft and the outer main shaft, and a second pipe shaft gear provided to interlock the drive shaft and the tube shaft, and the outer main shaft and the tube shaft are concentric. A concentric two-shaft auger machine characterized by being configured to rotate in opposite directions.