JPS5848717B2 - Recoilless twin shaft drive drilling rig - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a recoilless twin-shaft drive drilling device suitable for use as a well driller or a boring machine for drilling wells for water, oil, etc., or foundation holes for cast-in-place piles.

Conventionally, a recoilless single-shaft drive excavator has been proposed by the present applicant.

That is, FIG. 1 shows the principle of a recoilless single-shaft drive excavator. In FIG. 1, a drive shaft 12 is installed upright on a power source 10. It is designed to be rotated by

The rotational force of the drive shaft 12 is transmitted through the drive gear 14 and the idle gear 16.
, the rotational force can be transmitted to the driven shaft 20 via the driven gear 18.

The driving gear 14 and the driven gear 18 are made of gears of equal size, so that the driving shaft 12 and the driven shaft 20
The drive shaft 12 and the driven shaft 20 rotate in the same direction because they rotate at the same number of rotations and the idle gear 16 is interposed between them.

The driving gear 14, the idle gear 16, and the driven gear 18 are each housed in a gear case 22 to constitute rotational force transmission means, and the gear case 22 pivotally supports the driving shaft 12 and the driven shaft 20. 22 is the drive shaft 12
It is attached so that it can slide freely in the axial direction.

Therefore, when excavating by moving the gear case 22 downward in the diagram in the excavation equipment configured as described above, a load torque T is applied to the driven shaft 20.

is generated, and on the other hand, the power source 10 receives a power source reaction torque 'r1
However, as mentioned above, the drive shaft 12 and the driven shaft 2
0 is rotating in the same direction at the same rotation speed or at a slightly different rotation speed, resulting in a load torque T.

and the power source reaction torque T1 have the same value, and no rotational moment is generated in the gear case 22.

Therefore, the gear case 22 is connected to the drive gear 14 and the idle gear 1.
6. When lowered along the drive shaft 12 together with the driven gear 18 and the driven shaft 20, it is possible to drill a hole with little vertical error using the bit 24 attached to the tip of the driven shaft 20.

The conventional excavation equipment has the advantage that no rotational moment is generated in the gear case 22, but since the drive shaft 12 is composed of one single drive shaft and the gear case 22 slides while being guided by this drive shaft 12, the gear case 22 is When descending, the gear case 22 tilts, resulting in a large sliding resistance on the sliding surface between the gear case 22 and the drive shaft 12, which has the disadvantage that the gear case cannot move up and down smoothly.

The present invention was made in order to eliminate the drawbacks of the conventional recoilless single-shaft drive excavating equipment, and an object of the present invention is to propose an excavating equipment in which the gas case moves up and down smoothly.

In the present invention, a pair of power sources supported on the ground, a pair of drive shafts independently rotated by the respective rotary power sources, and a pair of drive shafts arranged parallel to each other on both sides of the drive shafts are provided. A driven shaft to which rotation is transmitted through a transmission means in the same rotational direction as the driving shaft and at a rotational speed that is equal to or slightly different from that of the driving shaft, and an excavator attached to the tip of the driven shaft. The transmission means is slidable with respect to the drive shaft, and the driven shaft is moved to excavate underground, so the transmission means are arranged on both sides of the driven shaft. As it descends guided by a pair of driven shafts,
The transmission means does not tilt, and as a result, large sliding resistance does not occur on the sliding surface between the drive shaft and the transmission means.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a recoilless twin-shaft drive excavator according to the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 2 is a front view of an embodiment according to the present invention, and FIG. 3 is a side view thereof.

As shown in FIGS. 2 and 3, an upper base 28 is placed on the lower base 26, and the upper base 2B can slide on the lower base 26 in the left-right direction in FIG. can.

A plurality of guides 30 are provided on the side surface of the upper base 28, and the upper base 28 is guided by the guides 30 and slides in the left-right direction in FIG.

Furthermore, a plurality of jack devices 32 are attached to the same side of the upper base 28 to which the guide 30 is attached.

The jack device 32 is used when performing a jack-up and sliding operation, which will be described later.

Note that the guide 30 and the jack device 32 are provided at predetermined intervals on both sides of the upper base 28, as shown in FIG.

Furthermore, a cylinder 34 is attached to the lower base 26 as shown by the two-dot chain line in FIG.
4 is fixed to the lower base 26, and the end of the rod 36 of the cylinder 36 is fixed to the lower base 28 via a bracket 38.

Therefore, by operating the cylinder 34, the upper base 2
8 can be slid on the lower base 26 to move its position as shown by the two-dot chain line in FIG.

As shown in FIGS. 2 and 3, a turret 40 is arranged on the upper base 28.

As shown in FIG. 3, a bracket 42 is provided near the lower end of the turret 40, and this bracket 42 is rotatably attached to a frame 46 fixed on the upper base 28 via a pin 44.

Therefore, the frame 46 is pivotally supported on the upper base 28 via the pin 44.

Furthermore, a bracket 48 is attached above and close to the bracket 42 of the turret 40, and the end of the rod 52 of the cylinder 50 is rotatably attached to this bracket 48 via a pin 54. installed on.

As shown in FIG. 3, the end of the cylinder 50 is rotatably attached to a bracket 56 fixed on the upper base 28 via a pin 58.

Therefore, when the cylinder 50 is operated and the rod 52 is retracted, the turret 40 gradually tilts around the pin 40 as shown by the two-dot chain line in FIG. 3, and falls to a substantially horizontal position as shown in FIG. It can be changed.

Furthermore, when the cylinder 50 is operated to extend the rod 52 from this horizontal position, the turret 40 gradually rises.
It is installed upright in the position shown by the solid line in Figure 3.

As shown in FIG. 2, a pair of prime movers 60 are installed at the bottom of the tower 40.
．． 60 will be installed.

As shown in FIG. 2, the prime mover 60 is attached to the lower part of the tower 40 via a reduction gear 62 and a transmission case 64.

On the other hand, Kelly rods 66, 6 whose cross section is formed into a polygonal shape
6 is a width direction member 6 forming the upper part of the tower 40 shown in FIG.
Its upper part is rotatably supported by γ.

Furthermore, the lower part of the Kelly rod 66 is connected to the prime mover 60 by a gear transmission mechanism (not shown) in the reduction gear 62 and the transmission case 64.
rotational force is transmitted.

In this case, the motive force 60 and the Kelly rod 66 are each constructed as a pair, but the prime mover 60 on the left side in FIG. It is designed to transmit rotational force.

In Figures 2 and 4, the left and right Kelly rods 66,
A gear case 68 is attached to the gear case 66 so as to be slidable in the vertical direction.

Inside the gas case 68, the left edge rod 66
A gear γ0 fixed to is arranged, and this gear γ0
meshes with the central gear γ4 via an idle gear γ2 pivotally supported by the gear case 68.

The center gear T4 is formed to have the same size as the gear TO fixed to the left Kelly rod 66, and the two mesh with each other via the idle gear T2, so the Kelly rod 66 has the same size as the gear TO fixed to the left Kelly rod 66. It rotates in the same direction and at the same rotation speed as the fixed driven shaft γ6.

On the other hand, a gear γ8 is also fixed to the right Kelly rod 66, and this gal 18 meshes with the center gear γ4 via an idle gear 80 pivotally supported by the gear case 6B.

The gear γ8 fixed to the Kelly rod 66 on the right side is the gear γ
0, the driven shaft γ6 fixed to the center gear γ4 and the right Kelly rod 66 rotate in the same direction and at the same rotation speed. become.

Although not shown, a drilling bit is attached to the lower end of the driven shaft γ6.

As shown in FIG. 2, feed cylinders 82 and 82 are fixed to the left and right sides of the tower 40.
2 is connected to a gear case 68 via a chain, and by operating the feed cylinder 82, the gear case 68 can be moved up and down together with the driven shaft γ6.

As shown in FIG. 3, a horizontal member 84 is attached to the upper part of the width member 6l in a direction perpendicular to the width member 6γ forming the upper part of the turret 40.

There are pulleys 86, 86, 86.8 at both ends of the horizontal member 84.
6 is pivotally supported, and this pulley 86, 86, 86.8
6 is stretched with a wire from a hoist 88 provided on the upper base 28.

The hoist 88 is used to suspend reinforcing bars inserted into the borehole or to suspend tools.

Furthermore, an operation panel 90 and a hydraulic unit 92 are mounted on the upper base 28.
, and a switchboard 94 are respectively arranged.

The operation of the embodiment according to the present invention configured as described above is as follows.

First, in FIG. 2, the rotational force from the left prime mover 60 is transmitted to the left Kelly rod 66 via the left reduction gear 62 and the gears in the transmission case 64, and the rotational force of the left Kelly rod 66 is transmitted to the gear 10, It is transmitted via the idle gear 12 to the gear γ4 of the driven shaft γ6.

In this case, the gear γ0 of the left Kelly rod 66 and the gear 14 of the driven shaft 16 are configured to have the same size, and since the gears γ0 and γ4 are engaged via the idle gear γ2, the Kelly rod 66 and the gear 14 on the left side are of equal size. The driven shaft γ6 rotates in the same direction at the same rotation speed, or rotates at a slightly different rotation speed.

On the other hand, the rotational force from the right prime mover 60 is transmitted to the right speed reducer 6.
2. It is transmitted to the right Kelly rod 66 via the gear in the transmission case 64.

Kelly Rod 66's Gya 8 on the right is Idol Gya 8
The gear γ4 of the driven shaft γ6 meshes with the gear γ4 of the driven shaft γ6 through the gear γ0.
It is made up of the same size as.

Therefore, like the left Kelly rod 66, the right Kelly rod 66 and the driven shaft γ6 either rotate in the same direction of force and at the same rotational speed, or rotate at slightly different rotational speeds.

As a result, the reaction torque that the gear case 68 receives from the driven shaft γ6 and the reaction torque that the left and right Kelly rods 66, 66 receive act in concert with each other, and no rotational moment is generated in the gear case 68.

Furthermore, the gear case 68 moves up and down by operating the feed cylinder 82, but in this case, the gear case 68 is connected to the two kelly rods 66. Since the gear case 68 is guided by the gear case 66, the gear case 68 does not tilt, and the gear case 68 can be smoothly moved up and down.

In addition, when retracting the tower 40 from a position directly above the excavation hole during work, a cylinder 34 attached to the lower base 26 is used.
The operation is performed by sliding the base 28 on the lower base 26.

Further, when the excavation equipment itself is to be moved horizontally, it is carried out by performing a jack-up and sliding operation 7.

That is, first, the jacks 32, 32 are activated to place them on the ground and support the excavation rig via the upper base 28.

When the cylinder 34 is operated in this state, only the lower base 26 moves.

Next, when the jack 32 is returned to its original position and removed from the ground, and the cylinder 34 is operated in this state, the upper base 2
8 moves on the lower base 26 together with the turret 40 and the like arranged on the upper base 28, and as a result, the excavation device itself can move in the horizontal direction.

In addition, when transporting the excavation equipment by truck, etc., the turret 40
can be tilted horizontally as shown by the two-dot chain line in FIG.

That is, when the cylinder 50 is operated and the rod 52 is retracted, the turret 40 is moved by the Kelly rod 66, the prime mover 60, the driven shaft γ6,
Together with the gear case 68, it can rotate counterclockwise in FIG. 3 about the pin 44 and fall down to the horizontal position shown in FIG.

In the embodiment according to the present invention, since the prime mover is mounted on the tower 40, the tower 40 itself can be folded down on the base in this way.

As explained above, according to the recoilless twin-shaft drive excavation device according to the present invention, a pair of rotary power sources supported on the ground, a pair of drive shafts independently rotated by the respective rotary power sources, The respective drive shafts are arranged parallel to each other on both sides, and the rotation of each of the drive shafts is transmitted through a transmission means so that the rotation direction is the same as that of the drive shaft, and the rotation speed is equal to or slightly different from that of the drive shaft. The transmission means is slidable relative to the drive shaft, and the driven shaft moves underground. Since the excavation is carried out, the transmission means is not subjected to any torsional moment, and since drive shafts are disposed on both sides, the transmission means can be smoothly moved up and down.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram showing the principle of a conventional recoilless single-axis drive excavator, Fig. 2 is a front view showing the structure of an embodiment of the recoilless twin-axis drive excavator according to the present invention, and Fig. 3 is the same. FIG. 2 is a side view of the embodiment of the present invention shown in FIG. 2, and FIG. 4 is a sectional view showing the internal structure inside the gas case. 40...turret, 60...motor, 66.
...Kerry rod, the drive shaft, 68...
・Gear case that is the transmission means, T6... Driven shaft.

Claims (1)

[Scope of Claims] 1. A pair of rotary power sources supported on the ground, a pair of drive shafts independently rotated by each of the rotary power sources, and a pair of drive shafts arranged parallel to the valley drive shaft. A driven shaft to which the rotation of the shaft is transmitted through a transmission means in the same rotational direction as the driving shaft and at a rotational speed equal to or slightly different from that of the driving shaft; and a driven shaft attached to the tip of the driven shaft. a recoilless twin-shaft drive excavator, characterized in that the transmission means is slidable relative to the drive shaft, and the driven shaft moves to excavate underground. 2. A turret provided with the driving shaft and the driven shaft is pivotally supported on the excavation equipment body so as to be able to stand up and fall down, and the turret is equipped with the rotational power source. A recoilless twin-shaft drive drilling rig according to scope 1.