JP3016179B2 - Swivel for drilling machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary percussion drilling machine, which drills a ground through a master coupling and an extension rod through a master coupling and an extension rod when drilling the ground. To the tip bit,
Further, the present invention relates to an improvement of a swivel for a drilling machine for sending fresh water or compressed air required for the drilling machine to the tip of the drilling machine and discharging the drilling slime from the tip of the drilling machine to the outside of the system. .

[0002]

2. Description of the Related Art A conventional swivel for a drilling machine supports a packing retainer and a swivel with bolts from the drilling machine drifter side and contacts an adapter in an integrated manner. That is, in the conventional type, the swivel is held from one side, and the swivel is sandwiched from both sides.

[0003]

However, in the conventional type, the packing retainer and the adapter become resistance to rotation and cause a failure.

Further, in the conventional type, a steel space ring or a rubber packing containing fibers is used at a portion where the swivel and the adapter come into contact with each other. Friction resistance was added to the rotation.

Furthermore, in the conventional type, the packing retainer has two functions of structurally supporting the swivel and at the same time smoothing the contact surface with the adapter, so that the original striking force and rotational force are transmitted to the swivel side. There is a drawback that the function not to be performed cannot be sufficiently exhibited mechanically and materially.

In order to overcome the above-mentioned drawbacks of the conventional swivel, the present invention is designed to rotate the front holding ring 4 and the rear holding ring 5 together with the cleaning adapter 2,
The cleaning swivel 3 rotates independently and does not rotate with the rotation of the cleaning adapter 2, so that it is durable, has less labor for replacement and repair, and greatly reduces the risk of accidents. It is an object of the present invention to provide a mechanical swivel.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a swivel for a drilling machine, in which a master coupling is mounted inside a front part of the swivel. Attach the extension rod, form a through hole, provide a front fitting groove on the front outside to fit the front holding ring, form an insertion hole for inserting the shank rod at the rear, and form a water supply hole A water supply part having a water supply port and a water supply groove, a water supply part having a water supply port and a water supply groove, and a drainage part having a water discharge port and a water discharge groove are formed outside a cleaning adapter provided with a hollow cylinder having a water supply hole formed therein. ,
A cleaning swivel having an O-ring mounted on the inner surface and having a number of grooves formed therein for injecting grease is attached thereto, and a front holding ring is provided at one end of the cleaning swivel via a damper having bearings disposed on both surfaces. Is fitted to the front fitting groove of the cleaning adapter, and a rear holding ring is fitted to the rear fitting groove of the cleaning adapter via a damper having bearings disposed on both sides at the other end. The front holding ring and the rear holding ring rotate together with the cleaning adapter, and the cleaning swivel does not rotate with the rotation of the cleaning adapter.

[0008]

Next, a swivel for a drilling machine according to the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a front view of a drill for a drilling machine according to the present invention, and FIG. 2 is a longitudinal sectional view of a swivel for a drilling machine according to the present invention.

A swivel 1 for a drilling machine according to the present invention is shown in FIG.
As shown in FIG. 2, it comprises a cleaning adapter 2, a cleaning swivel 3, a master coupling 6, and an extension rod 7.

As shown in FIG. 2, a master coupling 6 is mounted inside a front portion of the cleaning adapter 2, and an extension 6a is provided in the master coupling 6a with a gap 6a from the master coupling 6. The rod 7 is mounted. A front fitting groove 2b for fitting the front holding ring 4 is provided outside the cleaning adapter 2 in front of the outside.

[0011] Behind the cleaning adapter 2, an insertion hole 2a for inserting a shank rod and a water supply hole 2c are formed. A hollow cylinder 2g having a water passage hole 2h is provided in the water supply hole 2c. In FIG. 2, reference numeral 17 denotes a pin screw.

Outside the cleaning adapter 2, a cleaning swivel 3 having a water supply portion 14 provided with a water supply port 14a and a water supply groove 3c, and a drainage portion 15 provided with a water supply port 15a and a drainage groove 3d is provided. Attach.

In order to attach the cleaning swivel 3 to the outside of the cleaning adapter 2, the cleaning swivel 3 is attached to the front holding ring 4 and the rear holding ring 5 via bearings 8, 9, 10 and 11 and dampers 12 and 13.

At one end of the cleaning swivel 3, the bearing 8 is mounted first, then the damper 12 is mounted, and finally the bearing 9 is mounted. Then, the rear holding ring 5 is mounted to hold the bearing 9. That is,
The bearings 8 and 9 are mounted on both surfaces of the damper 12.

At the other end of the cleaning swivel 3, a bearing 10 is first mounted, and then a damper 13 is mounted.
And finally the bearing 11. And
The front holding ring 4 is mounted to hold the bearing 11. That is, the bearing 1 is provided on both sides of the damper 13.
0 and 11 are attached.

In this manner, the cleaning swivel 3
Is attached to the outside of the cleaning adapter 2. That is, the cleaning swivel 3 has the bearings 8, 9, 10, 1 outside the cleaning adapter 2 on both sides.
1 is attached by a front holding ring 4 and a rear holding ring 5 via dampers 12, 13 having a structure in which 1 is disposed. Reference numerals 16, 16, 16, 16, 16,... Indicate O-rings, and reference numeral 2a indicates an insertion hole for inserting a shank rod.

The drilling water sent to the water supply port 14a of the water supply section 14 enters the water supply hole 2c, and the water flowing into the water supply hole 2c passes through the water passage hole 2h formed in the hollow cylinder 2g, and is extracted. It flows out of the inside of the tension rod 7a, flows into the gap 6a formed between the master coupling 6 and the extension rod 7, and is discharged through the drain port 15a of the drain part 15.

That is, the drilling water supplied from the water supply unit 14 passes from the cleaning adapter 2 through the extension rod 7 to the tip of the drilling hole swivel 1 and, together with the drilling scrap (slime), becomes the master. It passes through the gap 6a formed between the coupling 6 and the extension rod 7, reaches the inside of the cleaning adapter 2e, and is discharged to the outside through the drainage portion 15.

In the swivel 1 for a drilling machine according to the present invention, the cleaning swivel 3 is sandwiched between the front holding ring 4 and the rear holding ring 5, and the front holding ring 4 and the rear holding ring 5 rotate together with the cleaning adapter 2. However, the cleaning swivel 3
Has a structure that is independent of the rotation of the cleaning adapter 2 and does not rotate with the rotation of the cleaning adapter 2.

FIG. 3 is a longitudinal sectional view of a cleaning swivel constituting a swivel for a drilling machine according to the present invention. The cleaning swivel 3 has a water supply part 14 formed therein and a water passage hole 3e for drainage. The cleaning swivel 3 has an O-ring mounted in the cleaning swivel 3 and is used to inject grease. A large number of grooves 3b are formed. Reference numeral 3c is a water supply groove, and reference numeral 3d is a drainage groove.

FIG. 4 is a left side view and a partial sectional view of a cleaning swivel constituting a swivel for a drilling machine according to the present invention. Reference numeral 3e indicates a water passage hole, and a drainage portion 15 is provided outside the water passage hole 3e.

Reference numeral 3a denotes the inside of the cleaning swivel 3, and a cleaning adapter 2 is attached to the inside of the cleaning swivel 3a. Reference numeral 15b denotes a drain port.
A drain 15b may be further provided at a position opposite to the drain 15.

FIG. 5 is a front view of a bearing constituting a swivel for a drilling machine according to the present invention, FIG. 6 is a longitudinal sectional view of a damper constituting a swivel for a drilling machine according to the present invention, and FIG. It is a longitudinal section of a bearing which constitutes a swivel for a drilling machine.

The bearings 8, 9, 10 and 11 have circular holes 8 respectively.
a, 9a, 10a, and 11a are formed,
Circular holes 12a, 13a are also formed in the dampers 12, 13, and the diameters of the circular holes 8a, 9a, 10a, 11a formed in the bearings 8, 9, 10, 11 and the dampers 12, 13 are formed. The diameters of the circular holes 12a and 13a are the same.

As shown in FIG. 6 and FIG.
The bearings 2 and 13 are formed thicker than the bearings 8, 9, 10 and 11. Then, as shown in FIG.
The bearings 8, 9, 10, 11 are mounted on both sides of 3.

As the material for the bearings 8, 9, 10 and 11, it is best to use a bearing made of polytetrafluoroethylene. As the material of the dampers 12 and 13, it is preferable to use rubber made of polytetrafluoroethylene.

FIG. 8 is a front view of a front press ring of a drill for a drilling machine according to the present invention, FIG. 9 is a plan view of a front press ring of a swivel for a drill machine of the present invention, and FIG. 10 is the present invention. It is a partial sectional view of a front press ring of a swivel for a drilling machine.

As shown in FIGS. 8 to 10, the front holding ring 4 is formed with a circular hole 4e, and formed on the left and right with left and right vertical surfaces 4f and 4g.
Left and right protruding portions 4h and 4i are protruded from f and 4g. As shown in FIG. 9, four bolt nuts 4a, 4b, 4c, and 4d are attached to the left and right protruding portions 4h and 4i, respectively.

FIG. 11 is a front view of a rear holding ring of a swivel for a drilling machine according to the present invention, FIG. 12 is a plan view of a rear holding ring of a swivel for a drilling machine of the present invention, and FIG. It is a longitudinal cross-sectional view of the back press ring of the swivel for drilling machines.

A circular hole 5b is formed in the rear holding ring 5, and left and right vertical surfaces 5d and 5e are formed on the left and right, and left and right protruding portions 5f and 5g are protruded from the vertical surfaces 5d and 5e. Bolts and nuts 5a and 5c are attached to the left and right protrusions 5f and 5g, respectively.

FIG. 14 is a longitudinal sectional view of a cleaning adapter constituting a swivel for a drilling machine according to the present invention.
A front fitting groove 2b for fitting the front holding ring 4 is provided on the outer periphery in front of the cleaning adapter 2, and an insertion hole 2a for inserting a shank rod behind the cleaning adapter 2 is formed. In
A rear fitting groove 2f for fitting the rear holding ring 5 is provided.

Reference numeral 2c denotes a water supply hole.
, Water supplied from a water supply port 14a of the water supply unit 14 flows in, and the inflowed water passes through a water passage hole 2c formed in the hollow cylinder 2g, and is attached to an extension 2e mounted in the cleaning adapter 2e. It flows out of the rod 7a.

[0033]

Since the present invention is an apparatus having the structure described above, the following special effects can be obtained. First, a stable holding force of the cleaning swivel is obtained, and the durability of the cleaning swivel and the cleaning adapter is increased.
The effect is obtained that the time and effort for repair can be reduced and the danger of an accident can be greatly reduced.

Second, in the swivel for a drilling machine according to the present invention, since the front and rear holding rings and the cleaning adapter are integrated, the effect of completely eliminating the cause of the failure can be obtained.

Third, in the conventional type, since the packing retainer has two functions of structurally supporting the cleaning swivel and simultaneously smoothing the contact surface with the cleaning adapter, the original striking force and rotational force are reduced. While the function that does not propagate to the swivel side cannot be fully exhibited mechanically or materially, in the swivel for drilling machine of the present invention, the bearings against the rotational force, the damper against the impact force, respectively. Since it is a correspondingly simple structure and does not require any structural strength by itself, an effect is obtained in that the transmission of rotational force and impact force to the cleaning swivel can be significantly reduced.

Fourth, since the swivel for the drilling machine uses a polytetrafluoroethylene bearing for the bearing and also uses a polytetrafluoroethylene rubber for the damper, the frictional resistance is increased. , Corresponding to the impact force.

Fifthly, the front and rear holding rings rotate together with the cleaning adapter attached to the cleaning adapter, and the cleaning swivel alone is relatively independent of the rotation of the cleaning adapter.

[Brief description of the drawings]

FIG. 1 is a front view of a swivel for a drilling machine according to the present invention.

FIG. 2 is a longitudinal sectional view of a swivel for a drilling machine according to the present invention.

FIG. 3 is a longitudinal sectional view of a cleaning swivel constituting a swivel for a drilling machine according to the present invention.

FIG. 4 is a left side view of a cleaning swivel constituting the swivel for a drilling machine according to the present invention.

FIG. 5 is a front view of a bearing constituting the swivel for a drilling machine according to the present invention.

FIG. 6 is a longitudinal sectional view of a damper constituting a swivel for a drilling machine according to the present invention.

FIG. 7 is a longitudinal sectional view of a bearing constituting the swivel for a drilling machine according to the present invention.

FIG. 8 is a front view of a front retaining ring constituting the swivel for a drilling machine according to the present invention.

FIG. 9 is a plan view of a front holding ring constituting the swivel for a drilling machine according to the present invention.

FIG. 10 is a partial cross-sectional view of a front holding ring constituting a swivel for a drilling machine according to the present invention.

FIG. 11 is a front view of a rear holding ring constituting the swivel for a drilling machine according to the present invention.

FIG. 12 is a plan view of a rear holding ring constituting the swivel for a drilling machine according to the present invention.

FIG. 13 is a longitudinal sectional view of a rear holding ring constituting the swivel for a drilling machine according to the present invention.

FIG. 14 is a longitudinal sectional view of a cleaning adapter constituting a swivel for a drilling machine according to the present invention.

[Explanation of symbols]

 Reference Signs List 1 swivel for drilling machine 2 cleaning adapter 2a insertion hole 2b front fitting groove 2c water supply hole 2d through hole 2e inside cleaning adapter 2f rear fitting groove 2g hollow cylinder 2h water passage hole 3 cleaning swivel 3a inside cleaning swivel 3b groove 3c Water supply groove 3d Drain groove 3e Water hole 4 Front holding ring 4a-4d Bolt nut 4e Circular hole 4f, 4g Vertical surface 4h, 4i Projection 5 Rear holding ring 5a, 5c Bolt nut 5b Circular hole 5d, 5e Vertical surface 5f, 5g Projection 6 Master coupling 6a Gap 7 Extension rod 7a Inside extension rod 8, 9 Bearing 8a, 9a Circular hole 10, 11 Bearing 10a, 11a Circular hole 12, 13 Damper 12a, 13a Circular hole 14 Water supply unit 14a Water supply Mouth 15, 15b Drainage part 1 a drain port 16 O-ring 17-pin screw

Claims (3)

(57) [Claims] 1. A swivel for a drilling machine, wherein a master coupling is mounted inside the front, an extension rod is mounted inside the master coupling, and a through hole is formed. A hollow cylinder in which a fitting groove is provided before fitting the holding ring, an insertion hole for inserting a shank rod is formed in the rear and a water supply hole is formed, and a water passage hole is formed in the water supply hole. A water supply part having a water supply port and a water supply groove, and a drainage part having a water discharge port and a water drainage groove are formed outside the provided cleaning adapter. A cleaning swivel having a groove is attached, and a front holding ring is attached to one end of the cleaning swivel via a damper having bearings disposed on both sides of the cleaning swivel. At the same time, the rear holding ring is fitted and fitted into the rear fitting groove of the cleaning adapter via a damper having bearings disposed on both sides at the other end. A swivel for a drilling machine, wherein the ring and the rear holding ring rotate with the cleaning adapter, and the cleaning swivel does not rotate with the rotation of the cleaning adapter. 2. The swivel for a drilling machine according to claim 1, wherein a material of the bearing is a bearing made of polytetrafluoroethylene. 3. The damper is made of a rubber made of polytetrafluoroethylene.
A swivel for a drilling machine as described.