WO2015194898A1

WO2015194898A1 - Rod clamping device

Info

Publication number: WO2015194898A1
Application number: PCT/KR2015/006218
Authority: WO
Inventors: 인석신
Original assignee: 인석신
Priority date: 2014-06-18
Filing date: 2015-06-18
Publication date: 2015-12-23

Abstract

The present invention relates to a rod clamping device, and the rod clamping device for clamping a rod to a driving shaft provided at a head part moving along a lead of a boring machine comprises: a housing coupled to the driving shaft; a locking member screw-coupled to the housing so as to move forward and backward according to the forward and reverse rotations of the housing coupled to the driving shaft; a supporting part supported by the housing; and a collet unit extended from the supporting part so as to be inserted into a hollow part of the rod, and including a plurality of collet parts for holding and releasing the rod according to the forward and backward movements of the locking member. The rod clamping device, according to the present invention, can hold the rod by expanding the outer diameter of the collet unit inserted into the rod, and thus can more easily replace the rod. In addition, since the rod is coupled to the driving shaft of the head part by the collet unit, the wear and breakage of the rod and the driving shaft caused by frequent replacement of the rod or excessive fastening of the rod can be prevented.

Description

Rod clamping device

The present invention relates to a rod clamping device, and more particularly, to a rod clamping device capable of clamping a rod on a drive shaft provided in a head of a perforator.

In general, the perforator is a device for drilling deep holes drilled from the ground to the ground for drilling work, soil inspection, groundwater development.

The conventional technology of the perforator is disclosed in Korean Patent Publication No. 0624233.

The prior art perforator has a main body equipped with a driving device such as an engine, a leader supported by the main body, a head portion sliding on the reader and generating a lifting or rotating force by the driving device of the main body, and connected to the head portion of the head. The rod is lifted or rotated by a part, and is provided at the tip of the rod, and is lifted or rotated together with the rod, and an excavation unit for drilling the ground.

The excavation unit is composed of a bit for hitting the ground to be excavated, and a hammer operated by hydraulic pressure to impart the force to the bit. In addition, the hydraulic pressure transmission to the excavation unit is possible by installing a separate hydraulic line on the rod.

Such a perforator is drilled to a predetermined depth by the bit of the excavation unit hitting the rotation or the ground. As the ground is excavated, the drilling units and rods are introduced into the ground. The length of the rod is extended by connecting the rod by the depth of the excavation unit and the rod drawn into the ground.

However, since the rod is screwed to the head part of the conventional perforator, the thread of the drive shaft is worn or the rod or the drive shaft is damaged due to the over fastening of the rod due to frequent exchange of the rod.

The present invention has been made to improve the above problems, and an object thereof is to provide a rod clamping device that can grip the rod by expanding the outer diameter of the collet unit inserted in the rod.

A rod clamping device according to the present invention for achieving the above object is a rod clamping device for clamping a rod on a drive shaft provided in the head portion moving along the lead of the perforator, the housing coupled to the drive shaft, and the housing The locking member is screwed forward and backward according to the forward and reverse rotation of the housing coupled to the drive shaft, the support portion supported by the housing, and extending from the support portion is inserted into the hollow of the rod, and the forward and backward of the locking member And a collet unit including a plurality of collets for gripping and releasing the rod.

The locking member is formed with a plurality of guide grooves extending in the forward and backward direction of the locking member on the outer circumferential surface so that the collet portion can be retracted, the guide groove is the collet portion of the locking member according to Preferably, the contact surface in contact with the inner surface of the collet portion is inclined at a predetermined angle with respect to the center line in the front and rear direction of the locking member so as to be adjacent to or spaced from the center.

The collet part has a plurality of anti-slip protrusions formed on the outer circumferential surface of the collet to prevent the sliding of the inner circumferential surface of the rod and may be moved in a direction orthogonal to the front-rear center line of the locking member as the lock member moves forward and backward. The inner surface is formed to be inclined at an angle corresponding to the inclination angle of the contact surface of the locking member.

The housing has a main body having one end coupled to the drive shaft to rotate together with the drive shaft, and a fastener formed to penetrate along the length direction of the lead so that the locking member can be screwed, and the other end of the main body. Coupled, the support having a subbody rotatably supported about a longitudinal centerline.

Preferably, the locking member has a supply passage formed therethrough so that the working fluid injected through the head of the head may be supplied to the rod.

The rod clamping device according to the present invention has an advantage that the rod can be replaced more easily because the rod can be gripped by expanding the outer diameter of the collet unit inserted into the rod. In addition, since the rod is coupled to the drive shaft by the collet unit, it is possible to prevent wear and breakage of the rod and the drive shaft due to frequent replacement of the rod or overfastening of the rod.

1 is a side view of a perforator equipped with a rod clamping device according to the present invention,

2 is an exploded perspective view of the rod clamping device according to the present invention;

3 and 4 are cross-sectional views showing an operating state of the rod clamping device of FIG.

5 is an exploded perspective view of a rod clamping device according to another embodiment of the present invention;

6 and 7 show the rod clamp of FIG.

Hereinafter, a rod clamping device according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 to 4 show a rod clamping device 100 according to the invention.

Referring to the drawings, the rod clamping device 100 is a device for clamping the rod 13 to the perforator 10. The perforator 10 includes a main body 11, a lead 14 supported by the main body 11, a moving frame 15 moving along a length direction of the lead 14, and the moving frame ( A head portion 12 installed in the head portion 15, a drive shaft 16 mounted on the head portion 12, and connected with a rod 13 for drilling, and the head portion for driving the drive shaft 16. And a driving unit (not shown) installed at (12).

The moving frame 15 is coupled to a rail (not shown) formed in the longitudinal direction of the lead 14 so as to be movable in the longitudinal direction. Although not shown in the figure, the movable frame 15 is lifted along the rail by the driving unit. The driving unit includes a plurality of sprockets respectively installed at upper and lower portions of the lead 14, a chain that is caught by the sprockets, one side of which is fixed to the moving frame 15, and a hydraulic motor that drives one of the sprockets. .

The head portion 12 is installed on the front of the moving frame 15, the drive shaft 16 is installed. Male threads are formed on the outer circumferential surface of the lower end of the drive shaft 16 so that the rod clamping device 100 can be coupled thereto. At this time, the drive shaft 16 is formed with a flow path penetrated in the vertical direction to supply the working fluid, that is, water to a water hammer (not shown) provided at the end of the rod (13).

Hereinafter, the rod clamping device 100 according to the present invention will be described in detail.

The rod clamping device 100 is moved back and forth according to the forward and reverse rotation of the housing 200 coupled to the drive shaft 16 and the housing 200 screwed to the housing 200 and coupled to the drive shaft 16. The locking member 300 being extended, the support part 410 supported by the housing 200, extending from the support part 410 and inserted into the hollow of the rod 13, and before and after the locking member 300. It is provided with a collet unit 400 including a plurality of collet portion 420 for gripping and releasing the rod 13 according to the jeans.

The housing 200 includes a main body 210 screwed to a lower end of the drive shaft 16 and a subbody 220 coupled to a lower portion of the main body 210.

The main body 210 has a predetermined outer diameter and is formed in a cylindrical shape extending in the vertical direction. The main body 210 is provided with an inner space 211 having an open upper portion, and an internal thread is formed on the upper inner wall surface so as to be screwed with the drive shaft 16.

In addition, the main body 210 has a fastener 212 is formed to penetrate in the vertical direction so that the locking member 300 is coupled to the center of the bottom surface of the inner space (211). At this time, the fastener 212 is preferably formed with a female thread on the inner surface to be screwed with the locking member 300. The lower end of the main body 210 is formed with a coupling portion 213 formed with a male thread on the outer circumferential surface to be screwed with the sub-body 220.

On the other hand, although not shown in the drawings, the coupling pin may be installed to penetrate the main body 210 and the drive shaft 16 so that the main body 210 can rotate with the drive shaft (16).

The subbody 220 has a predetermined outer diameter and is formed in a cylindrical shape extending in the vertical direction. The sub body 220 is provided with a sub space 221 to penetrate in the vertical direction. The subbody 220 has a female thread formed on the lower inner wall surface thereof so as to be screwed to the coupling portion 213 of the main body 210. In addition, the sub-body 220 has a locking protrusion 222 is formed at the lower end so that the collet unit 400 can be rotatably supported.

The locking protrusion 222 protrudes toward the center of the sub space 221 at the lower end of the sub body 220 and extends along the circumferential direction of the sub body 220. The support protrusion of the support part 410 to be described later is seated on the upper surface of the locking protrusion 222 so that the support part 410 is supported by the subbody 220 to be rotatable about a longitudinal center line.

The locking member 300 is a screw coupling portion 310 screwed to the housing 200 to be retractable along the longitudinal direction of the leader, and the screw coupling portion 310 to be coupled to the collet unit 400. It has a collet interference portion 320 extending downward.

The screw coupling portion 310 has an outer diameter corresponding to the inner diameter of the fastener 212 of the main body 210 and extends in the vertical direction. The screw coupling portion 310 is a male thread is formed on the outer circumferential surface to be screwed to the fastener 212 of the main body (210).

In addition, the screw coupling portion 310 is provided with a separation prevention member 311 having an area larger than the area of the fastener 212 at the upper end. The release preventing member 311 has a fastening hole is formed so that the screw coupling portion 310 is screwed to the center portion. On the other hand, although not shown in the drawings, the fixing pin is installed to penetrate the separation preventing member 311 and the screw coupling portion 310 to secure the separation preventing member 311 and the screw coupling portion 310 mutually. .

In addition, the screw coupling portion 310 is formed with a supply passage 312 penetrated in the vertical direction in the center to supply the working fluid to the water hammer installed at the end of the rod (13).

The collet interference portion 320 extends downwardly at the lower end of the screw coupling portion 310 so that the screw coupling portion 310 may protrude to the lower side of the sub-body 220 when the main coupling portion 210 is coupled to the main body 210. It is formed to have an outer diameter corresponding to the inner diameter of 13). The collet interference portion 320 is formed with a plurality of guide grooves 321 extending in the forward and backward directions of the locking member 300 on the outer circumferential surface so that the collet portion 420 can be retracted.

The guide groove 321 is formed to be drawn inward from the outer peripheral surface of the collet interference portion 320, it is formed to have a width corresponding to the width of the collet portion 420 to guide the collet portion 420. .

In addition, the guide groove 321 is the inner surface of the collet portion 420 so that the collet portion 420 adjacent or spaced apart from the center of the locking member 300 according to the forward and backward movement of the locking member 300. The contact surface 322 is inclined at a predetermined angle with respect to the front-rear center line of the locking member 300. That is, the guide groove 321 spaces the collet portion 420 to the outside of the collet interference portion 320 so that the collet unit 400 grips the rod 13 when the locking member 300 moves upward. To the upper side is formed to be inclined so as to be adjacent to the front and rear center line of the collet interference portion 320.

On the other hand, although not shown in the drawings, the guide groove 321 may be formed to move away from the center line of the front and rear direction of the collet interference portion 320 toward the upper side. The guide grooves 321 may be formed to be spaced apart from each other along the circumferential direction of the collet interference portion 320 to correspond to the collet portion 420.

At this time, the collet interference portion 320 is formed so that the outer space is reduced toward the lower portion to the lower side with respect to the guide groove 321 to be easily introduced into the inlet hole 411 of the support portion 410 which will be described later It is.

The support part 410 is formed in an annular shape in which the inlet hole 411 is formed so that the collet interference part 320 can be introduced into the center. A support protrusion is formed at an upper end of the support 410 so as to be supported by the locking protrusion 222 of the subbody 220. The support protrusion is formed in a direction away from the center of the inlet hole 411 so that the bottom surface may be seated on the top surface of the locking protrusion 222. The support part 410 is rotatably supported by the subbody 220 by a support protrusion.

The collet part 420 extends downwardly under the support part 410, and a plurality of collet parts 420 are formed to be spaced apart from each other along the circumferential direction of the support part 410. A plurality of anti-slip protrusions 421 are formed on the outer circumferential surface of the collet portion 420 to prevent slipping of the inner circumferential surface of the rod 13.

In addition, the collet part 420 moves toward the center side of the inlet hole 411 as the inner surface moves upward so that the locking member 300 moves along the contact surface 322 when the locking member 300 moves upward. It is formed to be inclined to protrude. At this time, the inner surface of the collet 420 is the contact surface of the locking member 300 to be moved in a direction orthogonal to the center line in the front and rear direction of the locking member 300 in accordance with the forward and backward movement of the locking member 300 It is preferable to be inclined at an angle corresponding to the inclination angle of 322.

In this case, the collet part 420 extends along the front and rear center lines of the collet interference part 320 so as to extend the contact area with respect to the inner surface of the rod 13.

On the other hand, although not shown in the drawings, the guide groove 321 is formed so as to move away from the front and rear center line of the collet interference portion 320 toward the upper side, the inner surface of the collet portion 420 toward the lower side ( It may be inclined to protrude toward the center side of the 411.

The operation of the rod clamping device 100 according to the present invention configured as described above will be described in detail as follows.

First, the housing 200 is coupled to the drive shaft 16 provided in the head part 12 of the puncher 10 to install the rod clamping device 100 in the puncher 10. Next, the head 12 is moved to forcibly fit the collet 420 and the locking member 300 in the hollow of the rod 13 whose end is gripped by the rod mounting apparatus.

When the coupling of the rod 13 to the collet 420 is completed, the drive shaft 16 of the head 12 is rotated in the forward direction. At this time, the housing 200 is rotated together with the drive shaft 16, and the rod 13 is fixed to one end of the rod mounting apparatus to prevent rotation. In addition, since the locking member 300 screwed to the housing 200 is forcibly fitted to the rod 13 and is not rotated, the locking member 300 is moved upward when the housing 200 is rotated forward.

When the locking member 300 is moved upward, the collet 420 moves away from the locking member 300 by the inclined contact surface 322 to press the inner surface of the rod 13 so that the collet unit 400 is moved. ) Will grasp the rod (13).

On the other hand, when the rod 13 is separated from the rod clamping device 100, the end of the rod 13 is gripped by a gripping means such as a rod mounting apparatus, and then the drive shaft 16 of the head portion 12 is reversed. Rotate At this time, the housing 200 is rotated in the reverse direction with the drive shaft 16, the locking member 300 forcibly fitted to the rod 13 is moved downward in accordance with the rotation of the housing 200.

When the locking member is moved to the lower side, the collet unit 420 is moved to the inside of the locking member 300 by the inclined contact surface 322, so that the collet unit 400 is released to the rod 13.

The rod clamping device 100 according to the present invention configured as described above can easily grip the rod 13 by expanding the outer diameter of the collet unit 400 inserted into the rod 13, thereby more easily loading the rod 13. There is an advantage that can be exchanged. In addition, since the rod 13 is coupled to the drive shaft 16 of the head portion 12 by the collet unit 400, the rod 13 and the drive shaft due to frequent replacement of the rod 13 or overfastening of the rod 13. (16) wear and breakage can be prevented.

5 to 7 illustrate a rod clamping device 500 according to another embodiment of the present invention.

Elements having the same function as in the above-described drawings are denoted by the same reference numerals.

Referring to the drawings, the rod clamping device 500 is the main body 510 is coupled to the first connecting member 511 to the drive shaft 16, the first connecting member 511 is detachably coupled, the lock The member 300 is composed of a second connection member 512 screwed.

The first connection member 511 has a coupling hole 518 is formed so that the drive shaft 16 of the head portion 12 can be screwed. The coupler 518 penetrates in the vertical direction, and a female thread is formed on an inner circumferential surface thereof.

In addition, the first connection member 511 is provided with a flange portion 519 on the lower outer peripheral surface. The flange portion 519 protrudes in a direction away from the coupler 518 and extends along the circumferential direction of the first connection member 511. The flange portion 519 has a plurality of first insertion holes 514 are formed to penetrate in the vertical direction so that the fixing bolt 517 can be inserted. The first insertion holes 514 are formed to be spaced apart from each other along the circumferential direction in the flange portion 519.

The second connection member 512 is formed to have an outer diameter corresponding to the outer diameter of the flange portion 519, and an inner space 515 having an open upper portion is provided. In addition, a fastener 513 is formed in the second connection member 512 to penetrate in the vertical direction so that the locking member 300 is coupled to the center of the bottom surface of the inner space 515. At this time, the fastener 513 is preferably formed with a female thread on the inner surface to be screwed with the locking member 300. A lower end portion of the second connection member 512 has a coupling portion formed with a male thread on an outer circumferential surface thereof so as to be screwed with the subbody 520.

In addition, the second connection member 512 has a second insertion hole 516 formed at an upper portion of the position opposite to the first insertion hole 514 so that the fixing bolt 517 through the flange portion 519 can be fastened. do. The second insertion hole 516 preferably has a female thread formed on an inner circumferential surface thereof so as to be screwed to the fixing bolt 517.

As described above, the main body 510 includes a first connection member 511 coupled to the drive shaft 16, and a second connection member 512 coupled to the locking member 300. Since the connecting

members

511 and 512 are detachably coupled to each other, when the fastener 513 threads of the first connecting member 511 are worn out, only the first connecting member 511 may be replaced from the second connecting member 512. This can reduce the cost of maintenance and management.

In addition, the subbody 520 is provided with an extension 521 extending downward. The extension part 521 communicates with the sub space 221 and has a communication hole 522 corresponding to the inner diameter of the rod 13 so that the rod 13 can be inserted therein.

On the other hand, the inner surface of the extension portion 521 is a watertight retaining ring to maintain the watertight between the outer peripheral surface of the rod 13 and the inner surface of the extension portion 521 when the rod 13 is inserted into the communication port 522 ( 523) is installed. The watertight holding ring 523 is formed of a material having a predetermined elasticity such as urethane, and is preferably formed in an annular shape along the inner surface of the extension part 521.

In addition, the collet unit 400 further includes a spacer 531 formed in some of the collet parts 420 to support the collet parts 420 such that the collet parts 420 are spaced apart from each other by a predetermined distance. The spacer 531 extends a predetermined distance from the collet 420 toward the adjacent collet 420. At this time, the spacer 531 is preferably formed to be curved to the curvature corresponding to the curvature of the outer peripheral surface of the collet interference portion (320).

When the rod 13 is separated from the collet unit 400, when the locking member 300 is moved to the lower side of the housing 200 by the rotation of the drive shaft 16, the collet part () is inclined by the inclined contact surface 322. The 420 are moved inward to the locking member 300 to be adjacent to each other. At this time, the collet portions 420 adjacent to each other are in contact with the ends of the spacers 531, and thus, the collet portions 420 are prevented from coming into close contact with the locking member 300 by maintaining a predetermined interval. ) Can be separated. In addition, the collet portions 420 are prevented from being separated from the guide groove 321 by the spacer 531.

Although the present invention has been described with reference to the embodiments illustrated in the drawings, these are merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent embodiments thereof are possible.

Therefore, the true scope of protection of the present invention should be defined only by the appended claims.

Claims

In the rod clamping device for clamping the rod on the drive shaft provided in the head portion moving along the lead of the punching machine,

A housing coupled to the drive shaft;

A locking member screwed to the housing and advanced back and forth according to the forward and reverse rotation of the housing coupled to the drive shaft;

And a collet unit including a support part supported by the housing and a plurality of collet parts extending from the support part and inserted into the hollow of the rod and gripping and releasing the rod according to the forward and backward movement of the locking member. Rod clamping device.
The method of claim 1,

The locking member is formed with a plurality of guide grooves extending in the forward and backward direction of the locking member on the outer circumferential surface so that the collet portion can be retracted,

The guide groove is formed such that the contact surface in contact with the inner surface of the collet portion is inclined at a predetermined angle with respect to the center line in the front and rear direction of the locking member so that the collet portion is adjacent or spaced apart from the center of the locking member according to the forward and backward movement of the locking member. Rod clamping device, characterized in that.
The method of claim 2,

The collet part has a plurality of anti-slip protrusions formed on the outer circumferential surface of the collet to prevent the sliding of the inner circumferential surface of the rod and may be moved in a direction orthogonal to the front-rear center line of the locking member as the lock member moves forward and backward. Rod clamping device, characterized in that the inner surface is formed to be inclined at an angle corresponding to the inclination angle of the contact surface of the locking member.
The method of claim 3,

The housing is

A main body having one end coupled to the drive shaft to rotate together with the drive shaft, and a fastener formed to penetrate along the length direction of the lead so that the locking member can be screwed;

And a subbody coupled to the other end of the main body, wherein the support portion is rotatably supported with respect to a longitudinal center line.
The method of claim 2,

The locking member is a rod clamping device, characterized in that the supply passage is formed to pass through the longitudinal direction of the lead so that the working fluid injected through the drive shaft of the head portion can be supplied to the rod.