JPH01158196A - Excavator - Google Patents

Abstract

PURPOSE: To easily drill a hole having a substantially square cross section through formation of a machining member by providing a drilling blade at each top of an equilateral triangle and its inside and by rotating and revolving this machining member in a prescribed relation. CONSTITUTION: A drilling blade 11 is provided at each top of a substantially equilateral triangle and its inside, and the downside of a drilling action surface is formed as a machining member 10. This machining member 10 is mounted to a machining-member rotating support device 14 rotatably about its center G, this machining-member rotating support device 14 is mounted to a machining- member revolving support device 13. The center G is rotated by the machining- member rotating support device 14 at a radius (1/3<1/2> -1/2) times one side length of the triangle of the machining member 10. The machining member 10 is made to revolve three times in the direction to opposite the rotating direction.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an excavator.

[Conventional technology]

Until now, there was no excavator that could drill holes with a nearly square cross section.

[Problem that the invention seeks to solve]

Therefore, when drilling a hole with a square cross section, it is necessary to drill a hole with a circular cross section and then drill each corner separately.
The drawback was that it required a lot of work.

An object of the present invention is to make it possible to excavate a hole having a substantially rectangular cross section.

[Means for solving problems]

The feature of the excavator of the present invention is that the workpiece is rotatably attached to the workpiece rotation support device between its centers, and a digging blade is provided at each apex of a substantially equilateral triangle concentric with the center and inside the apex of the workpiece. The excavation surface is attached to a revolution support device, and a driving means is provided to rotate the workpiece three times in a direction opposite to the rotation direction, and its operation and effect are as follows. It is.

[For production]

In other words, according to Reuleaux's law of triangles, an equilateral triangle fits inside a square, and each vertex of the equilateral triangle is placed along the periphery of the square as shown in Figures 4 (a) to (ne).
When moving in the order of a) to (ne), the center of the equilateral triangle (G
) is the drilling method in which the cutting blade of the workpiece is provided by revolving around the center (0) of the square \3 in the direction opposite to the rotation direction of the equilateral triangle, 3 times in the direction opposite to the direction. The action surface moves on a substantially square plane.

〔Effect of the invention〕

Therefore, a hole having a substantially rectangular cross section can be easily excavated with an excavator without much labor.

〔Example〕

Next, embodiments of the present invention will be described based on the drawings.

As shown in Figures 1 to 3, a drive shaft (3) linked to a hydraulic motor (M) is attached to a machine base (3) that is movable back and forth on a rail (1) via rollers (2). 4) is rotatably attached via the bearing member (5) along the front-back direction, and the shaft center (4) of the drive shaft (4) is attached to the tip of the drive shaft (4).
A crankshaft (6) that is eccentric with respect to (6) through a bearing (9) so that it can rotate freely relative to the planetary gear (8), and its rotation axis (G) is attached to the planetary gear (8).
The excavator is constructed by attaching a substantially equilateral triangular processing member (10) concentrically with the excavator.

The eccentricity of the crankshaft (6) with respect to the drive shaft (4) (
As shown in FIG.
, B, and C, the following formula % formula % The ratio of the number of teeth between the ring gear (7) and the planetary gear (8) is set to 4=3, and the planetary gear (8) is the same as the ring gear (7). During one revolution, it rotates 173 times in the opposite direction, and in the end, the workpiece (10) is configured so that it rotates once in the opposite direction for every three revolutions.

The workpiece (10) has each vertex (A
, B, C) and an excavating blade (11) inside thereof to form an excavating action surface (F), and each vertex (A, B).

Virtual edges (AB), (AC), (BC) passing through C)
) are each formed in a slightly circular arc shape (Fig. 3), and as the workpiece (lO) rotates and revolves, as shown in Fig. 4 (A).
A hole (12) that moves like ~(ne) and has a square cross section.
excavate.

[Another example]

A hydraulic motor (M) rotates the drive shaft (4).
), an electric motor may also be used.

The drive shaft (4), the crankshaft (6) and the bearing member (
5) is called a workpiece revolution support device (13), and includes a planetary gear (8), a bearing (9) and a crankshaft (6).
) is referred to as a workpiece rotation support device (14).

The digging blade (11) has a substantially equilateral triangular digging surface (F).
It may be provided at each vertex (A, B, C) or any other location.

Virtual edges (AB) passing through each of the vertices (A, B, C), (
AC).

(BC) may be formed in a straight line.

As a mechanism for rotating and revolving the processing member (10), in addition to providing a planetary gear (8), a ring gear (7), and a hydraulic motor (M), a first motor that rotates the processing member (10); A second motor for revolution operation may be provided, and these motors are collectively referred to as a driving means.

The excavator of the present invention can be used for excavating vertical holes in underground tunnels and foundations of construction works, or for woodworking or metal processing.

Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of the drawing]

The drawings show an embodiment of an excavator according to the present invention, FIG. 1 is a side view showing a partial cross section of the whole, and FIG.
-N line arrow view, FIG. 3 is a front view of the processed member, and FIGS. 4(A) to 4(N) are explanatory diagrams showing the movement of the processed member. (10)... Processed parts, (11)...
Drilling blade, (13)... Processed member revolution support device,
(14)... Processed member rotation support device, (G).
... Center, (F) ... Excavation action surface.
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Claims (1)

[Claims] The workpiece (10) is attached to the workpiece rotation support device (14) so as to be rotatable around its center (G), and
A drilling blade (
11), and the excavation working surface (F) is connected to the processing member (10).
), and one side (a) of the equilateral triangle is (1/√3−
The workpiece rotation support device (14) is attached to the workpiece revolution support device (13) so that the center (G) rotates with a radius of 1/2) times, and the workpiece (10) is rotated on its axis while rotating. An excavator equipped with a drive means that rotates three times in the direction opposite to the direction of rotation.