CN212249842U

CN212249842U - Hole expanding drilling tool with sliding block

Info

Publication number: CN212249842U
Application number: CN202021824121.5U
Authority: CN
Inventors: 杨日平; 陈真; 杨湘龙
Original assignee: Changsha Heijingang Industrial Co Ltd
Current assignee: Changsha Heijingang Industrial Co Ltd
Priority date: 2020-08-27
Filing date: 2020-08-27
Publication date: 2020-12-29
Anticipated expiration: 2030-08-27

Abstract

The utility model relates to a reaming drilling tool with a sliding block, which comprises a central drill bit and sliding block components which are arranged at the end part of the central drill bit and are evenly distributed along the circumferential direction of the central drill bit; the sliding block assembly comprises a sliding block, and drilling teeth are arranged on the sliding block; the sliding block is matched with a second sliding groove arranged on the central drill bit, and the bottom of the second sliding groove and the vertical plane of the central drill bit form an acute angle; a limiting pin is arranged on the side part of the sliding block and is far away from the outer diameter direction of the sliding block; the top of the limiting pin is matched with a first sliding groove formed in the bottom of the sliding block; a bottom hole is formed in the central drill bit and matched with the limiting pin; be close to one side in the slider outside direction is equipped with bearing structure for support and lean on the slider, the reaming drilling tool of taking the slider that this application provided, the slider is difficult to drop and loses, changes the convenient slider of changing.

Description

Hole expanding drilling tool with sliding block

Technical Field

The utility model belongs to the technical field of the drilling tool technique and specifically relates to a take reaming drilling tool of slider.

Background

With the deepening of the drilling process technology in China, the construction difficulty in the drilling of rock and soil mountains is more and more high, the down-the-hole drilling machine is mainly used in the drilling blasting work under soft rock stratums and covering rock stratums, and because the upper rock stratum is soft or has a covering, the formed hole diameter cannot be drilled in the drilling blasting, and the deeper drilling work can be carried out only by fixing and forming the upper loose rock stratum.

In the drilling blasting work under soft rock stratum and covering rock stratum, because no proper drilling tool is available, most of the conventional drilling adopts secondary drilling or eccentric drilling tools, and the whole circumference of the eccentric drilling tool is not in the same center, so that the eccentric drilling tool is stressed unevenly and is easy to damage, and the drilling cost is high.

To this market a slider formula reaming drilling tool has appeared, and the slider can roll off under the reaction force of rock face again, advances in order to guarantee sleeve pipe and drilling system simultaneously with pore-forming diameter grow reaming to put into the sleeve pipe, when seting back the pipe after drilling in place, upwards mentions central drill bit, in the slider automatic sliding back central drill bit, sleeve pipe and drilling tool synchronous follow-up when can realizing drilling. Along with long-term back of using, the slider drops easily and loses, and the slider is difficult to change.

SUMMERY OF THE UTILITY MODEL

Solve the technical problem, an object of the utility model is to provide a take reaming drilling tool of slider, the slider is difficult to drop and loses, changes the convenient slider of changing.

The technical scheme of the utility model as follows:

a reaming drilling tool with a sliding block, which comprises a central drill bit,

the sliding block assemblies are arranged at the end part of the central drill bit and are uniformly distributed along the circumferential direction of the central drill bit;

the sliding block assembly comprises a sliding block, and drilling teeth are arranged on the sliding block;

the sliding block is matched with a second sliding groove arranged on the central drill bit, and the bottom of the second sliding groove and the vertical plane of the central drill bit form an acute angle;

a limiting pin is arranged on the side part of the sliding block and is far away from the sliding block;

the top of the limiting pin is matched with a first sliding groove formed in the bottom of the sliding block;

a bottom hole is formed in the central drill bit and matched with the limiting pin;

and a supporting structure is arranged on one side close to the outer side direction of the sliding block and used for abutting against the sliding block.

Preferably, the top of the limit pin is spherical, a first contact surface is arranged on the sliding block, the first contact surface is concave spherical, and the first contact surface is connected with the first sliding groove and is positioned in the direction away from the limit pin.

Preferably, the center drill is internally provided with a center hole and a first exhaust hole,

one end of the first exhaust hole is connected with the central hole, and the other end of the first exhaust hole is connected with the first sliding groove.

Preferably, both sides of the sliding block are provided with protruding portions, the protruding portions are matched with the third sliding grooves in the side walls of the second sliding grooves, and the cross sections of the protruding portions are arc-shaped.

Preferably, the support structure comprises a first support surface on the central drill bit;

and the second contact surface is abutted to the first supporting surface and is positioned on the sliding block.

Preferably, one end of the boss near the support structure is spherical,

the support structure comprises a concave spherical surface located on the first support surface, and the concave spherical surface is matched with the end part of the convex part.

Preferably, the end plane of the central drill bit is connected with the bottom surface of the second chute to form a connecting line;

the limiting pin is located on the connecting line.

Preferably, a threaded hole is formed in the limiting pin.

Preferably, an avoiding groove is formed in the side portion of the sliding block, and the position of the avoiding groove corresponds to that of the limiting pin.

The utility model provides a reaming drilling tool with a sliding block, which comprises a central drill bit and sliding block components which are arranged at the end part of the central drill bit and are uniformly distributed along the circumferential direction of the central drill bit; the sliding block component comprises a sliding block, and drilling teeth are arranged on the sliding block; the sliding block is matched with a sliding chute arranged on the central drill bit, and the bottom of the sliding chute and the vertical plane of the central drill bit form an acute angle; a limiting pin is arranged on the side part of the sliding block and far away from the outer diameter direction of the sliding block; the top of the limiting pin is matched with a first sliding groove arranged on the bottom of the sliding block; the central drill bit is provided with a bottom hole which is matched with the limiting pin; be close to slider outside one side of ascending side and be equipped with bearing structure for support and lean on the slider, when reaming drilling tool drilling work, central drill bit tip axial equipartition has slider assembly, and slider assembly's slider is equipped with the brill tooth along the inclined plane roll-off of spout bottom under the reaction force of stratum on the slider, and the external diameter grow of reaming drilling tool can carry out reaming work this moment. When the slider outwards expands, the bearing structure in the slider outside direction supports and leans on the slider, and the slider is difficult to drop from the center drill. The maximum outer diameter of the reaming drilling tool is the diameter of the central drill bit, and the limiting pin is fixed on the central drill bit, so that the limiting pin is not easy to jump in the sliding process of the sliding block, the sliding block can always slide along the first sliding groove, and the sliding block is balanced in stress and not easy to fall off when sliding; if the detritus sediment gets into the spout bottom, will make the frictional force increase between slider and the spout, the slider is difficult to slide, at the reaming drilling tool during operation, just can slide with regard to the slider bears great load, after long-term the use, the slider drops easily from the center drill and loses, at the reaming drilling tool is out of work, when the slider draws in, the slider covers at the spacer pin top, the detritus sediment is difficult to get into the contact position of spacer pin and first spout, the detritus sediment is difficult to with the slider like this, first groove contact, reduce the atress load of slider during operation, avoid long back of live time, the slider drops to lose from the center drill head because of the atress load is too big.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a perspective view of a reamer with a sliding block in the embodiment;

FIG. 2 is a cross-sectional view of the reamer tool with a sliding block in this embodiment;

fig. 3 is a schematic diagram illustrating a closed state of a sliding block of the reamer tool with the sliding block in the embodiment;

FIG. 4 is a schematic structural diagram of a slider in this embodiment;

FIG. 5 is a schematic view of a structure of the embodiment in which the slider is engaged with the limit pin;

FIG. 6 is a schematic structural view of a second chute of the present embodiment;

FIG. 7 is a schematic view of the sanding head sanding stop pin in the present embodiment;

FIG. 8 is a schematic view illustrating a state where a screw is engaged with a thread inside a stopper pin according to the present embodiment;

FIG. 9 is a schematic diagram of the slider of this embodiment removed from the center bit.

Reference numbers in the drawings illustrate: 1. a center drill; 2. a slider assembly; 21. a slider; 22. drilling teeth; 23. a second chute; 24. a spacing pin; 25. a first chute; 26. a support structure; 261. a first support surface; 262. a second contact surface; 263. a concave spherical surface; 264. a third contact surface; 265. a transition surface; 266. a second support surface; 27. a first contact surface; 3. a central bore; 4. a first exhaust port; 5. a boss portion; 6. a third chute; 7. a threaded hole; 8. an avoidance groove; 9. polishing head; 10. and (4) screws.

Detailed Description

In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present invention, it is to be understood that the terms "upper", "lower", and the like, indicate orientations or positional relationships, and are used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the components or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.

As shown in fig. 1 to 9, the present invention provides a reaming drilling tool with sliding blocks, which includes a central drill bit 1, and sliding block assemblies 2 disposed at an end of the central drill bit 1 and uniformly distributed along a circumferential direction of the central drill bit 1; the sliding block component 2 comprises a sliding block 21, and drilling teeth 22 are arranged on the sliding block 21; the slide block 21 is matched with a sliding chute arranged on the central drill bit 1, and the bottom of the sliding chute and the vertical plane of the central drill bit 1 form an acute angle; a limit pin 24 is arranged on the side part of the slide block 21 and far away from the outer diameter direction of the slide block 21; the top of the limit pin 24 is matched with a first sliding groove 25 arranged on the bottom of the sliding block 21; the central drill bit 1 is provided with a bottom hole which is matched with the limit pin 24; be close to slider 21 outside one side of ascending side and be equipped with bearing structure 26 for support and lean on slider 21, when reaming drilling tool drilling work, 1 tip axial equipartition of center drill bit has slider assembly 2, and slider 21 of slider assembly 2 is equipped with on the slider 21 and bores tooth 22 along the inclined plane roll-off of spout bottom under the reaction force of stratum, the external diameter grow of reaming drilling tool this moment, can carry out reaming work. When the slide block 21 expands outward, the support structure 26 on the outer side of the slide block 21 abuts against the slide block 21, and the slide block 21 is not easy to fall off from the center drill 1. The maximum outer diameter of the reaming drilling tool is the diameter of the central drill bit 1, and the limiting pin 24 is fixed on the central drill bit 1, so that the limiting pin 24 is not easy to move in the sliding process of the sliding block 21, the sliding block 21 can always slide along the first sliding groove 25, and the sliding block 21 is balanced in stress and not easy to fall off when sliding; if the detritus sediment gets into the spout bottom, will make the frictional force increase between slider 21 and the spout, slider 21 is difficult to slide, at the reaming drilling tool during operation, just can slide with regard to slider 21 bears great load, after long-term the use, slider 21 drops easily from the center drill and loses, at the reaming drilling tool is out of work, when slider 21 draws in, slider 21 covers at spacer pin 24 top, the detritus sediment is difficult to get into the contact position of spacer pin 24 and first spout 25, the detritus sediment is difficult to with slider 21 like this, the contact of first groove, reduce the atress load of slider 21 during operation, avoid long back of live time, slider 21 drops because of the atress load is too big from center drill 1 and loses.

In the prior art, the common structure is that a through hole is formed in a sliding block, a pin shaft is arranged in the through hole, an elastic check ring is arranged on the pin shaft, a steel ball is arranged at the bottom of the pin shaft and clamped in a steel ball accommodating groove in the central drill bit 1, when the rock stratum pushes the sliding block to slide outwards, the pin shaft is abutted against the steel ball, the steel ball rolls continuously, and the sliding block slides to complete reaming. In order to make the round pin axle support with the steel ball constantly and lean on, the steel ball constantly rolls, and the steel ball needs to be higher than the top of steel ball holding tank, just so the round pin axle can support with the steel ball constantly and lean on, and the steel ball can normally roll. However, with the structure, rock debris is easy to accumulate between the steel balls and the corners of the steel ball containing groove, so that the friction force between the steel balls and the steel ball containing groove is increased, the load borne by the sliding block is increased when the sliding block slides, and the sliding block is easy to damage, fall and lose. On the other hand, due to the fact that the drilling construction environment is poor, muddy water sand stones usually flow into the vicinity of the pin shaft along with the through holes, the elastic check ring is soaked in the muddy water sand stones for a long time to be abraded, the elastic check ring is prone to failure along with the increase of the service life, and the muddy water sand stones flow into the steel ball containing groove along with the gaps of the through holes; thirdly, because the steel ball holding tank sets up on central drill bit, the muddy water grit directly contacts with the steel ball holding tank, has increaseed the frictional force between steel ball and the steel ball holding tank equally for the slider receives the load when sliding and increases, and the slider is fragile drops and loses.

The utility model provides a reamer with a sliding block, firstly, the sliding block 21 is not provided with a hole for placing the limit pin 24, the surface of the sliding block 21 is undamaged, and muddy water and sand stone are prevented from flowing in; secondly, an elastic check ring is not adopted, so that muddy water and sand stone caused by failure of the elastic check ring are prevented from flowing into the contact position of the sliding block 21, and the sliding block 21 is prevented from being damaged and falling off due to overlarge friction and overlarge stress load; thirdly, the muddy water sand stone can not directly contact with the groove and can not be accumulated in the groove. Therefore, the utility model provides a take reamer tool of slider is different with the conventional structure that sets up, can effectively avoid slider 21 to drop and lose.

The utility model provides an in the embodiment, the spacer pin 24 top is spherical, is equipped with first contact surface 27 on the slider 21, and first contact surface 27 is concave spherical, and first contact surface 27 is connected with first spout 25, and is located the direction of keeping away from spacer pin 24. The first contact surface 27 is in surface contact with the spherical shape at the top of the limit pin 24, so that foreign matters are prevented from being accumulated between the limit pin 24 and the first sliding groove 25, on the other hand, the first sliding groove 25 is positioned at the bottom of the sliding block 21, and due to the gravity, the foreign matters cannot be accumulated at the bottom of the first sliding groove 25, and the arrangement can effectively prevent the sliding block 21 from being damaged due to the foreign matters and falling off from the central drill bit 1.

The utility model provides an in the embodiment, 1 inside centre bore 3 and the first exhaust hole 4 of being equipped with of center drill, 4 one ends of first exhaust hole are connected with centre bore 3, and the other end is connected with first spout 25. The high-pressure gas generating device conveys high-pressure gas to the first sliding groove 25 through the central hole 3 and the first exhaust hole 4, so that the high-pressure gas can continuously blow gas at the contact position of the limiting pin 24 and the first sliding groove 25, and foreign matters do not exist at the contact position of the limiting pin 24 and the first sliding groove 25. On the other hand, prior art sets up slider 21 on central drill bit 1, gaseous can only aim at the steel ball clearance of blowing, can not clear up whole steel ball holding tank by the way, the foreign matter can not clear up by the way, and this kind of structure in this application, because first spout 25 sets up in the slider 21 bottom, gaseous earlier with first spout 25 bottom contact, gaseous diffusion everywhere, form the cyclone, and then can drive the foreign matter in the first spout 25 and blow away, foreign matter is collected because of this is difficult for accumulating to first spout 25 reason because of gravity, under this condition, this application still utilizes the cyclone to clear up it once more, can effectively avoid slider 21 to appear damaging because of the foreign matter and drop from central drill bit 1.

The utility model provides an in the embodiment, the both sides of slider 21 all are equipped with bellying 5, and the cooperation of third spout 6 on bellying 5 and the 23 lateral walls of second spout, bellying 5 structure one-tenth arc. Because the sliding block 21 should ensure that the sliding block does not deviate as much as possible in the sliding process, if the sliding block 21 deviates during sliding, the sliding block will extrude with the side wall of the first sliding groove 25, and the sliding block 21 is easily damaged and falls off due to overlarge stress load. In this embodiment, in order to prevent the sliding block 21 from deviating during the sliding process, firstly, the limit pin 24 is disposed at the bottom of the sliding block 21 and contacts with the sliding block 21; secondly, two third chutes 6 on the side of the sliding block 21 are respectively contacted with two protrusions 5 on the sliding block 21, so that three contact lines are formed, the cross sections of the three contact lines are triangular, and the triangular structure is stable, so that the sliding block 21 cannot deviate in the sliding process, and the sliding block 21 is prevented from falling off due to overlarge stress. The section of the boss 5 is arc-shaped, and the section of the third sliding chute 6 is also arc-shaped, so that the friction force of the sliding block 21 in the sliding process is reduced.

The present invention provides an embodiment in which the support structure 26 comprises a first support surface 261 located on the center drill bit 1, a second contact surface 262 abutting against the first support surface 261, and the second contact surface 262 is located on the slider 21. During specific use, the impacter is connected 1 limit rotation of center drill bit and is reciprocated to strike and punch, and slider 21 atress back outwards expands along first spout 25 makes the diameter grow that punches realize the reaming. In the process, the first supporting surface 261 carries out limiting support on the second contact surface 262 on the sliding block 21, and the sliding block 21 is effectively prevented from continuously expanding outwards when the center drill bit 1 is pushed forwards. Preferably, taking the central drill bit 1 below the reamer, the included angle between the second contact surface 262 and the axis of the central drill bit 1 is an acute angle, so that the supporting effect is good.

The utility model provides an in the embodiment, bellying 5 is close to bearing structure 26's one end is spherical, bearing structure 26 is including being located concave sphere 263 on the first holding surface 261, concave sphere 263 with the tip cooperation of bellying 5. By matching the end of the protruding portion 5 with the concave spherical surface 263, when the hole expanding drill works, the protruding portion 5 of the sliding block 21 is always tightly attached to the concave spherical surface 263 on the first supporting surface 261, so as to prevent muddy water and sand from accumulating in the supporting structure 26. Preferably, the inclined plane at the bottom of the sliding block 21 is a third contact surface 264, a transition surface 265 is arranged between the third contact surface 264 and the second contact surface 262, the transition surface 265 is arc-shaped, and a second support surface 266 matched with the transition surface 265 is arranged on the first support surface 261, so that the end of the convex part 5 is in contact with the concave spherical surface 263, the transition surface 265 is also in surface contact with the second support surface 266, and when the reamer tool works, the two surfaces are in contact with each other at a position where the sliding block 21 is in close contact with the central drill bit 1, namely, muddy water and sand are prevented from entering the first sliding chute 25; secondly, uniform auxiliary supporting force is provided at the external part of the sliding block 21, so that the sliding block 21 is prevented from suddenly deviating at a certain position due to uneven stress when working; thirdly, the contact area between the sliding block 21 and the central drill bit 1 is large, the pressure intensity is small, the bearing capacity of the sliding block 21 is strong, the sliding block 21 can be prevented from falling off from the central drill bit 1, and the service life of the reaming drilling tool is prolonged.

The utility model provides an in the embodiment, 1 tip plane of center bit is connected with 23 bottom surfaces of second spout, forms the connecting wire, and spacer pin 24 is located the connecting wire. If the position of the limit pin 24 is close to the first supporting surface 261, when the slide block 21 is folded, the height difference between the end of the slide block 21 and the end of the central drill bit 1 is too large, and once impact occurs, the slide block 21 is easy to fall off from the central drill bit 1; if the limit pin 24 is arranged on the end part of the central drill bit 1, the limit pin 24 is exposed more, the strength of the limit pin 24 is smaller, the limit pin 24 is easy to break, and once the limit pin 24 breaks, the slide block 21 cannot be normally folded and unfolded. Therefore, the better position of the limit pin 24 is on the connecting line formed by connecting the end plane of the central drill bit 1 and the bottom surface of the second sliding groove 23, the limit can be performed on the sliding block 21, the limit pin 24 is not easy to break, and the using effect is better.

Another problem with the use of the stop pin 24 in the above embodiment is that once the drill bit on the slide 21 is damaged, which may cause the slide 21 to fail, the slide 21 is difficult to remove. The utility model provides an in the embodiment, the inside screw hole 7 that is equipped with of spacer pin 24. And (3) polishing the spherical body at the head part of the limiting pin 24 by using a pneumatic or electric polishing head 9 until the threaded hole 7 is exposed. For example, when the threaded hole 7 of the stopper pin 24 is M10, the M10 screw 10 is screwed into the threaded hole 7 of the stopper pin 24 to the bottom of the hole, the M10 screw 10 is further screwed by a wrench, the stopper pin 24 is forced to be disengaged from the hole, the stopper pin 24 and the M10 screw assembly are taken out together, and the slide block 21 can be taken out.

The utility model provides an in the embodiment, slider 21 lateral part is equipped with dodges groove 8, and the position of dodging groove 8 is corresponding with the spacing groove. The avoidance groove 8 is arranged to facilitate the operation of the pneumatic or electric sanding head 9.

The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same or similar parts in the embodiments are referred to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A reaming drilling tool with a sliding block is characterized by comprising a central drill bit,

2. The reamer drilling tool with the sliding block as claimed in claim 1, wherein the top of the limit pin is spherical, the sliding block is provided with a first contact surface, the first contact surface is concave spherical, and the first contact surface is connected with the first sliding groove and is located in a direction away from the limit pin.

3. The reamer tool with sliding blocks of claim 1, wherein the central drill bit is internally provided with a central hole and a first vent hole,

4. The reamer tool with the sliding block as claimed in claim 1, wherein the sliding block is provided with a protrusion on both sides, the protrusion is engaged with a third sliding groove on the side wall of the second sliding groove, and the cross section of the protrusion is arc-shaped.

5. The reamer tool with slips of claim 4, wherein the support structure comprises a first support surface on the central drill bit;

6. The reamer tool with the sliding block of claim 5, wherein an end of the boss proximate to the support structure is spherical,

7. The reamer tool with the sliding block as claimed in claim 1, wherein the plane of the end of the central drill bit is connected with the bottom surface of the second chute to form a connecting line;

the limiting pin is located on the connecting line.

8. The reamer tool with the sliding block as claimed in claim 1, wherein the stopper pin is internally provided with a threaded hole.

9. The reamer drilling tool with the sliding block as claimed in claim 1, wherein the side portion of the sliding block is provided with an avoiding groove, and the avoiding groove is located corresponding to the limiting pin.