JPS5848716B2 - Recoilless twin shaft drive drilling rig - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a reactionless twin-shaft drive drilling device suitable for use as a well driller for drilling wells for water, oil, etc.

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 gears of equal size, and as a result, 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.

Each of the drive gear 14, idle gear 16, and driven gear 18 is housed in a gear case 22 to constitute rotational force transmission means, and the gear case 22 pivotally supports the drive shaft 12 and the driven shaft 20. 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.

occurs, and on the other hand, a power source reaction torque T1 is generated in the power source 10, but as described above, the drive shaft 12 and the driven shaft 20
are rotating in the same direction at the same rotation speed or at a slightly different rotation speed, resulting in a load torque T.

is a different value from the power source reaction torque T1, 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.

However, although the above-mentioned drilling equipment has the advantage that no rotational moment is generated in the gear case 22, the drive shaft 1
2 is arranged as one, and the gear case 22 is connected to this drive shaft 12.
Because the gear case 22 slides while being guided by the
A large sliding resistance is generated on the sliding surface between the gear case and the drive shaft 12, and the gear case has a drawback that smooth vertical movement is not possible.

The present invention was made in order to eliminate the drawbacks of the conventional recoilless single-shaft drive excavator, and an object of the present invention is to provide an excavator in which a gear case can smoothly move up and down.

The present invention includes a rotary power source supported on the ground, a pair of drive shafts rotated by the rotary power source, and a pair of drive shafts arranged parallel to each of the drive shafts so that the rotation of the drive shafts is transmitted through a transmission means. It consists of a driven shaft whose rotational direction is the same as that of the driving shaft and to which the rotational speed is transmitted so as to be equal to or slightly different from that of the driving shaft, and an excavation part attached to the tip of the driven shaft, and the rotational speed is The power source and the pair of drive shafts are connected via a differential gear device, and the transmission means is slidable relative to the drive shaft, and the driven shaft is moved to excavate underground. Since the transmission means is guided down by a pair of drive shafts arranged on both sides of the driven shaft, the transmission means does not tilt, and as a result, the distance between the drive shaft and the transmission means is lowered. No large sliding resistance is generated on the sliding surface, and the vertical movement of the transmission means can be performed smoothly.

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 28 can slide on the lower base 26 in the left-right direction in FIG. I can do it.

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
Slide left and right on the diagram.

Note that the guides 30 are provided 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 34 is fixed to the upper base 28 via a bracket 38.

Therefore, by operating the cylinder 34, the upper base 2
8 can be slid on the lower base 28 to move its position as shown by the two-dot chain line in FIG.

As shown in FIG. 3, a power source 40, a transmission 42, a differential gear 44, a chain case 46, and drive cases 48A and 48B are provided on the upper base 28.

The drive cases 48A, 48B are provided as a pair on the left and right as shown in FIG.
8B has drive shafts 50A each having a polygonal cross section.
, 50B are erected.

A gear case 52 is provided on the drive shafts 50A, 50B so as to be slidable in the axial direction, and a pair of feed cylinders 5
It is moved up and down by 4A and 54B.

As shown in FIG. 2, a gear 56A is attached to the left drive shaft 50A, and this gear 56A meshes with a center gear 60 via an idle gear 58A.

The central gear 60 is attached to a driven shaft (not shown in FIG. 2), and a chuck 62 is attached to this driven shaft, and a polling iron is attached to this chuck 62.

Since the gear 56A attached to the drive shaft 50A and the gear 60 on the driven shaft side are configured to have the same size, the drive shaft 50A and the driven shaft rotate at the same number of rotations, and there is no space between them. Since the idle gear 58A is interposed, the drive shaft 50A and the driven shaft rotate in the same direction.

On the other hand, a gear 56B is attached to the right drive shaft 50B, and this gear 56B meshes with the center gear 60 via the idle gear 5BB.

Since the gear 56B attached to the drive shaft 50B and the gear 60 attached to the driven shaft have the same size as the gear 56A on the left side, the drive shaft 50B and the driven shaft rotate at the same time. Moreover, since the idle gear 58B is interposed between the two, the drive shaft 50B and the driven shaft rotate in the same direction.

Next, from the prime mover 40 to the transmission 42, differential gear device 44, chain case 46, drive gear case 4
A mechanism for transmitting rotational force to the drive shafts 50A, 50B via 8A, 48B will be explained with reference to FIGS. 4 and 5.

FIG. 4 is an explanatory view of a mechanism for transmitting rotational force from the prime mover 40 to the drive shafts 50A and 50B, and FIG. 5 is an explanatory view of FIG.

As shown in FIG. 4, a prime mover 40 and a transmission 4
2 through a chain 64, and the output shaft 66 of this transmission 42 is connected to a bevel gear 6.
8 is installed.

This bevel gear 68 meshes with a bevel gear 72 attached to a case 70 of the differential gear device 44.

This case 70 includes a differential gear 74 which is rotated by a rotating shaft having its axis in the vertical direction as shown in FIG.
, 76 are provided.

Differential gears 78, 80 are engaged with the differential gears 74, 76, which are rotated by rotating shafts having their axes in the left-right direction in FIG.

An inner shaft 82 is attached to the left differential gear 78,
A sprocket 84 is attached to the right end of the inner shaft 82.

On the other hand, an outer shaft 86 is attached to the right differential gear 80, and a sprocket 88 is attached to this outer shaft 86.

The differential gear device 44 includes a case 70 and upper and lower differential gears 74.
, 76, and left and right differential gears 78, 80. Therefore, the sum of the rotational speeds of the inner shaft 82 and the outer shaft 86 is always equal to the rotational speed of the bevel gear 72.

As shown in FIG. 4, a sprocket 84 attached to the right end of the inner shaft 82 is connected to the sprocket 92 via a chain 90, so that the rotational force of the inner shaft 82 is transmitted to the shaft 94. There is.

A bevel gear 96 is attached to the end of the shaft 94,
This bevel gear 96 meshes with a bevel gear 98 on the drive shaft side.

That is, the rotational force of the shaft 94 is applied to the bevel gear 96. 98 to rotate the drive shaft 50A.

On the other hand, a sprocket 88 attached to the end of the outer shaft 86
is connected to a sprocket 100 via a chain 98, so that the rotational force of the outer shaft 86 is transmitted to the sprocket 100.

The sprocket 100 is attached to a shaft 102, and a bevel gear 104 is attached to the other end of the shaft 102, and this bevel gear 104 is attached to the bevel gear 1 on the drive shaft side.
It meshes with 06.

Therefore, the rotational force of the shaft 102 is the bevel gear 1 04 , 1
06 to rotate the drive shaft 50B.

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

First, the drive shafts 50A, 50B shown in FIG. 2 and the driven shaft to which the chuck 62 is attached rotate in the same direction at the same number of rotations or at slightly different numbers of rotations.

Therefore, the reaction torque that the driven shaft receives during excavation and the reaction torque that the drive shafts 50A and 50B receive cancel each other out.
No rotational moment is generated in the gear case 52, allowing excavation work with good vertical accuracy.

Further, since the gear case 52 is guided along the two drive shafts 50A and 50B, the gear case 52 does not tilt, and the gear case 52 can be smoothly moved up and down.

Also, normally one prime mover 40 has two drive shafts 50A, 5.
In order to accurately transmit the rotational force to 0B, it is impossible unless the bevel gears 96 and 98 and the bevel gears 104 and 106 are brought into elastic contact because of manufacturing and assembly errors.

In the embodiment according to the present invention, as described above, the prime mover 4
Since the differential gear device 44 is used in the transmission path between the shaft 94 and the drive shaft 50A, 50B, even if there is a difference in the rotational speed between the shaft 94 and the shaft 102, the contact between the bevel gear 96 and the bevel gear 98 and the The contact between the bevel gear 104 and the bevel gear 106 is ensured so that rotational force can be accurately transmitted.

FIG. 6 shows the structure of another embodiment according to the present invention.

In the embodiment shown in FIG. 6, the same or similar members used in the embodiments described in FIGS. 4 and 5 are given the same reference numerals, and detailed explanation thereof will be omitted.

In FIG. 4, bevel gears 68 and 72 are used to transmit rotational force from the transmission 42 to the differential gear device 44.
However, the present invention is not limited to this, and in FIG. 6, transmission between the transmission 42 and the differential gear 44 is performed using spur gears 110 and 112. There is.

That is, the spur gear 1 is connected to the output shaft 66 of the transmission 42.
10 is attached, and this spur gear 110 meshes with a spur gear 112 attached to the case 70 of the differential gear 44.

Further, in the embodiments shown in FIGS. 4 and 5, chains 90 and 98 are used to transmit the rotational force between the differential gear device 44 and the drive shafts 50A and 50B, but the present invention is not limited to this. Instead, in FIG. 6, shafts 114 and 116 are extended from the differential gears 80 and 82, respectively, and these shafts 114,
Attach bevel gears 96 and 104 to 116 and drive shaft 5.
It meshes with bevel gears 98 and 106 on the 0A and 50B sides.

Even in this case, the rotational force of the differential gear device 44 is transferred to the drive shaft 5.
It can be transmitted to the 0A and 50B sides.

As explained above, according to the recoilless twin-shaft drive excavator according to the present invention, there is provided a rotary power source supported on the ground, a pair of drive shafts rotated by the rotary power source, and a pair of drive shafts parallel to each drive shaft. a driven shaft, which is arranged in an excavation part attached to the tip of the drive shaft, the rotary power source and the pair of drive shafts are connected via a differential gear device, and the transmission means is slidable with respect to the drive shaft. Since the driven shaft is moved to excavate underground, the transmission means does not receive any rotational moment, and the vertical movement of the transmission means is controlled by driving shafts arranged on both sides. This allows for smooth vertical movement.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 is an explanatory diagram showing the principle of a conventional recoilless single-shaft drive excavator, and FIG. 2 is a front view showing an embodiment of the recoilless twin-shaft drive excavator according to the present invention. FIG. 3 is a side view of the embodiment according to the present invention shown in FIG. 2, FIG. 4 is an explanatory diagram showing the rotational force transmission mechanism of the embodiment according to the present invention, and FIG. An explanatory diagram of the transmission path according to the present invention as seen from the V line,
FIG. 6 is an explanatory diagram of a transmission path in another embodiment according to the present invention. 40... Prime mover, 44... Differential gear device, 50A,
50B... Drive shaft, 52... Gear case as a transmission means, 62... Chuck attached to the driven shaft.

Claims (1)

[Claims] 1. A rotary power source supported on the ground, a pair of drive shafts rotated by the rotary power source, and a pair of drive shafts arranged parallel to each drive shaft so that the rotation of each drive shaft is transmitted to the drive shafts through a transmission means. The rotary power source comprises a driven shaft having the same rotational direction as the drive shaft and a rotation speed that is equal to or slightly different from that of the drive shaft, and an excavation part attached to the tip of the driven shaft. The rotational force is transmitted to the pair of drive shafts via a differential gear device, and the transmission means is slidable relative to the drive shafts, so that the driven shafts move to excavate underground. A recoilless twin-shaft drive drilling rig featuring: