CN114263436A - Hard rock stratum drill bit for crushing with safeguard function - Google Patents

Abstract

The invention discloses a drill bit with a protection function for crushing a hard rock stratum, which belongs to the technical field of drill bits and comprises a drill handle, wherein the drill handle is connected with a crushing structure for crushing the hard rock stratum, the crushing structure is connected with a dismounting structure for dismounting and replacing the crushing structure, and the drill handle is connected with a transmission structure for power transmission of the crushing structure; the dismounting structure comprises a first bolt, a plurality of abutting grooves are formed in a fixing block of the transmission structure, and the first bolt abuts against the fixing block through the abutting grooves; the drill bit body is fixed on the fixing block by abutting the abutting groove and the fixing block, so that different drill bit bodies can be conveniently replaced for different types of rock stratums, and the crushing requirement is met.

Description

Hard rock stratum drill bit for crushing with safeguard function

Technical Field

The invention relates to the technical field of drill bits, in particular to a hard rock stratum crushing drill bit with a protection function.

Background

The drill bit is a common drilling tool, is usually made of metal, has different materials and shapes for different purposes, needs a special drill bit for breaking rock when exploring and breaking rock, and needs a hard rock stratum breaking drill bit with a protection function in order to protect the drill bit when breaking rock.

The drill bit for drilling the rock-soil body in the fault breaking zone is disclosed as CN2016211994161, and comprises a drill bit body, wherein the drill bit body is a cylindrical pipe body, a plurality of cutting teeth are arranged at the lower end of the drill bit body, a top plate is fixedly connected to the upper end of the drill bit body through a bolt, the top plate is circular, a clamping head is fixedly connected to the center of the upper end of the top plate, the clamping head is vertically arranged, a through hole is formed in the upper end of the clamping head, the through hole penetrates through the clamping head and the top plate from top to bottom in sequence, and a push plate is arranged at the upper end inside the drill bit body. However, the drill shank and the drill bit body are fixed, when the hardness of the rock is larger than the bearing range of the drill bit, the protection measures of the drill bit are poor, the drill bit is easy to damage, the drill bit body cannot be disassembled, and the maintenance and the replacement are inconvenient.

Disclosure of Invention

In order to solve the problems, the hard rock stratum drill bit with the protection function is provided, different drill bodies can be conveniently replaced by rock strata of different types, and therefore the crushing requirement is met.

The technical scheme adopted by the invention for solving the technical problems is as follows:

a drill bit with a protection function for crushing a hard rock stratum comprises a drill handle, wherein the drill handle is connected with a crushing structure used for crushing the hard rock stratum, the crushing structure is connected with a dismounting structure used for dismounting and replacing the crushing structure, and the drill handle is connected with a transmission structure used for transmitting power to the crushing structure; the dismouting structure includes first bolt, be equipped with a plurality of conflict grooves on the fixed block of transmission structure, first bolt is contradicted through conflict groove and fixed block.

The invention further improves the structure and also comprises a control structure which is arranged on the drill handle and used for protecting the crushing structure; the control structure comprises a sliding block arranged inside the drill handle, two pairs of second sliding grooves are formed in the drill handle, the sliding block is connected with the drill handle in a sliding mode through the second sliding grooves, a second sliding ring is further connected inside the drill handle in a sliding mode through the second sliding grooves, a spring is fixedly connected between the second sliding ring and the sliding block, a second bearing is fixedly connected inside the second sliding ring, and an inner ring of the second bearing is connected with the transmission structure.

In a further development of the invention, the diameter of the spring is greater than the diameter of the second bearing outer ring, and the length of the second sliding groove is greater than the distance between the second sliding ring and the sliding block.

In a further development of the invention, the crushing structure comprises a bit body, which is arranged at the top end of the drill shank; the top fixedly connected with of drill bit body cuts the sword a plurality of, a plurality of diamond compact pieces of fixedly connected with on the sword of cutting, diamond compact piece is circular form, and is a plurality of diamond compact piece is the arc and arranges.

In addition, the transmission structure further comprises a push rod, and the push rod is fixedly arranged inside the fixed block; the inside one end of drillstock is equipped with two pairs of first spouts, the drillstock has first sliding ring through first spout sliding connection, the first bearing of the inside fixedly connected with of first sliding ring, the inner ring and the catch bar fixed connection of first bearing, the inside fixedly connected with internal gear of drillstock, drillstock fixedly connected with external gear, internal gear and external gear meshing, the inner ring fixed connection of the one end of catch bar and second bearing, the one end fixedly connected with of catch bar keeps off the ring, keep off the inner ring conflict of ring and second bearing, be equipped with the fixed slot on the bit body, the fixed block cup joints through fixed slot and bit body.

In a further improvement of the invention, the fixing block is in a quadrangular prism shape, and the fixing groove is in a quadrangular prism shape.

In a further development of the invention, the length of the first runner is greater than the length of the inner gear, and the thickness of the inner gear is greater than the thickness of the outer gear.

The invention further improves the structure that the first sliding ring and the second sliding ring are both in a ring shape, and two pairs of protrusions distributed in a cross shape are fixedly connected to the outer parts of the first sliding ring and the second sliding ring.

The drill handle is provided with a pair of placing grooves, the limiting blocks are connected with the drill handle in a sliding mode through the placing grooves, and one end of each limiting block is abutted against the outer ring of the second bearing.

The drill bit for crushing hard rock stratum is further improved and has a protection function, and is characterized by further comprising an adjusting structure, wherein the adjusting structure comprises an adjusting groove, the adjusting groove is formed in the bottom end of the drill handle, the drill handle is connected with an adjusting nut through the adjusting groove, the adjusting nut is in threaded connection with the drill handle, the top end of the adjusting nut is abutted against the bottom end of the sliding block, and a mark post is fixedly connected to the inner wall, located on the adjusting groove, of the drill handle.

According to the technical scheme, the invention has the beneficial effects that:

1. the invention relates to a hard rock stratum crushing drill bit with a protection function, which comprises a drill handle, wherein the drill handle is connected with a crushing structure for crushing the hard rock stratum, the crushing structure is connected with a dismounting structure for dismounting and replacing the crushing structure, the hard rock stratum can be crushed through the crushing structure, and the dismounting structure is convenient for replacing the crushing structure, namely: install the drill shank with the drill bit body on, on the fixed block was cup jointed through the fixed slot with the drill bit body, screw up the first bolt above the drill bit body, first bolt will be to the motion of fixed block direction, and contradict through conflict groove and fixed block, thereby with the firm fixed above the fixed block of drill bit body, thereby be convenient for change different drill bits to the stratum of different grade type, thereby satisfy broken demand, the drill bit body rotates, thereby it rotates to drive the diamond compact piece above the sword, diamond compact piece contradicts with the rock, can carry out broken drilling to the rock.

2. The invention relates to a hard rock stratum crushing drill bit with a protection function, a drill handle is connected with a transmission structure for power transmission of a crushing structure, a control structure for protecting the crushing structure is installed on the drill handle, the drill handle is connected with a limiting structure for limiting the control structure, the transmission structure is convenient for driving the crushing structure to work, the control structure is convenient for protecting the crushing structure, the crushing structure is prevented from being damaged, and the limiting structure is capable of limiting the working state of the control structure, namely: the drill handle is fixed on the drilling machine, so that rock can be crushed and drilled, the drilling machine drives the drill handle to rotate, the drill handle drives the outer gear to move through the inner gear, the push rod is driven to rotate, the fixing block is driven to rotate, power is provided for the drill bit body conveniently, rock strata with different depths have different structures and different hardness degrees, the same drill bit cannot meet requirements, when the hardness of the rock strata exceeds the hardness which can be borne by a diamond composite sheet on the cutting edge of the drill bit, the rock strata cannot be continuously crushed, so that the drill bit cannot be pushed, at the moment, the drilling machine still provides thrust for the drill bit, so that the drill bit body pushes the fixing block to move towards the inside of the drill handle, the push rod moves towards the inside of the drill handle, when the thrust reaches the pressure set by the spring, the first bearing slides along the first sliding chute under the action of the first sliding ring, so that the outer gear and the inner gear are driven to be separated, the second slip ring is driven to slide in the second sliding groove under the matching of the retaining ring and the second bearing, so that the spring is compressed, the outer gear is separated from the inner gear at the moment, the drill handle rotates and cannot drive the fixing block to rotate, the drill handle is driven to rotate along with the drilling machine, the fixing block and the drill bit body do not rotate, the cutting edge and the diamond composite sheet on the drill bit body are protected, the drilling machine can be stopped from being damaged under strong thrust, the drill bit can be pulled out after the drill handle does not rotate, the drill bit is not stressed at the moment, the spring pushes the second slip ring to reset, the push rod is pushed to reset, the inner gear and the outer gear are meshed again, the next work is facilitated, the drill bit body can be replaced at the moment, when the drill bit does not need to be protected, the second bolt can be rotated, and the second bolt can drive the limiting block to move along the placing groove, the stopper will stretch into the second spout to contradict with the bottom of second sliding ring, thereby prevent the motion of second sliding ring, thereby the restriction catch bar's motion, when the drill bit body contacts with harder rock, will unable the protection.

3. The invention relates to a hard rock stratum crushing drill bit with a protection function, wherein a drill handle is connected with an adjusting structure for adjusting the bearing pressure, and the protective pressure of a control structure can be adjusted through the adjusting structure, namely: after the drill bit body is installed, the pressure bearing size of the drill bit needs to be adjusted according to the rock hardness which can be borne by the diamond composite sheet and the cutting edge on the drill bit body, the adjusting nut is rotated and moves in the adjusting groove, so that the spring is compressed or released, the pressure bearing size can be accurately adjusted according to the mark post, and the drill bit can be protected.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description will be briefly introduced, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

Fig. 1 is a schematic view showing the overall structure of a hard rock breaking drill bit having a shield function according to the present invention.

Fig. 2 is a schematic view of the connection structure of the drill shank and the crushing structure of the present invention.

Fig. 3 is an enlarged view of the structure of the part a shown in fig. 2.

Fig. 4 is an enlarged schematic view of the structure of the part B shown in fig. 2.

FIG. 5 is a schematic view of the connection structure of the drill shank and the fixing block of the present invention.

Fig. 6 is a schematic view of a connection structure of the first slip ring of the present invention.

Fig. 7 is a schematic view of a connection structure of a second slip ring according to the present invention.

Fig. 8 is a schematic view of the connection structure of the slider of the present invention.

Fig. 9 is a schematic view of the connection structure of the target of the present invention.

In the figure: 1. a drill shank; 2. a crushing structure; 201. a diamond compact; 202. cutting edges; 203. a bit body; 3. a disassembly and assembly structure; 301. a first bolt; 302. a contact groove; 4. a limiting structure; 401. a second bolt; 402. a limiting block; 403. a placement groove; 5. an adjustment structure; 501. adjusting the nut; 502. an adjustment groove; 503. a marker post; 6. a transmission structure; 601. a fixed block; 602. fixing grooves; 603. a first slip ring; 604. a first chute; 605. a first bearing; 606. an internal gear; 607. an outer gear; 608. a push rod; 609. a baffle ring; 7. a control structure; 701. a slider; 702. a second chute; 703. a second slip ring; 704. a second bearing; 705. a spring.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1 to 9, the drill bit for crushing a hard rock stratum with a protection function according to the present invention includes a drill shank 1, the drill shank 1 is connected to a crushing structure 2 for crushing the hard rock stratum, the crushing structure 2 is connected to a dismounting structure 3 for dismounting and replacing the crushing structure 2, the drill shank 1 is connected to a transmission structure 6 for power transmission of the crushing structure 2, the drill shank 1 is provided with a control structure 7 for protecting the crushing structure 2, the drill shank 1 is connected to a limiting structure 4 for limiting the control structure 7, and the drill shank 1 is connected to an adjusting structure 5 for adjusting the magnitude of a bearing pressure;

wherein the crushing structure 2 comprises a diamond compact 201, a cutting edge 202 and a bit body 203; the dismounting structure 3 comprises a first bolt 301 and an abutting groove 302; the control structure 4 comprises a second bolt 401; a stop block 402 and a placement slot 403; the adjusting mechanism 5 comprises an adjusting nut 501, an adjusting groove 502 and a mark post 503; the transmission structure 6 comprises a fixed block 601, a fixed groove 602, a first slip ring 603, a first sliding groove 604, a first bearing 605, an internal gear 606, an external gear 607, a push rod 608 and a stop ring 609; the control structure 7 includes a slider 701, a second runner 702, a second slip ring 703, a second bearing 704, and a spring 705.

Specifically, the control structure 7 includes a sliding block 701, a sliding block 701 is disposed inside the drill shank 1, two pairs of second sliding grooves 702 are disposed inside the drill shank 1, the sliding block 701 is slidably connected with the drill shank 1 through the second sliding grooves 702, a second sliding ring 703 is further slidably connected inside the drill shank 1 through the second sliding grooves 702, a spring 705 is fixedly connected between the second sliding ring 703 and the sliding block 701, a second bearing 704 is fixedly connected inside the second sliding ring 703, an inner ring of the second bearing 704 is connected with the transmission structure 6, the diameter of the spring 705 is greater than the diameter of an outer ring of the second bearing 704, and the length of the second sliding groove 702 is greater than the distance between the second sliding ring 703 and the sliding block 701; different rock formations with different depths have different hardness degrees, the same drill bit cannot meet the requirements, when the hardness of the rock formations exceeds the hardness which can be borne by the diamond compact 201 on the cutting edge 202 of the drill bit, the rock formations cannot be broken continuously, so that the drill bit cannot be pushed, the drilling machine still provides thrust for the drill bit at the moment, the drill bit body 203 is forced to push the fixed block 601 to move towards the inside of the drill shank 1, the push rod 608 moves towards the inside of the drill shank 1, when the thrust reaches the pressure set by the spring 705, the first bearing 605 slides along the first sliding groove 604 under the action of the first sliding ring 603, so that the outer gear 607 is separated from the inner gear 606, the second sliding ring is driven to slide in the second sliding groove 702 under the matching of the retaining ring 609 and the second bearing 704, the spring 705 is compressed, and at the moment, the outer gear 607 is separated from the inner gear 606, the drill handle 1 rotates, the fixing block 601 cannot be driven to rotate, the drill handle 1 rotates along with a drilling machine, the fixing block 601 and the drill body 203 do not rotate, the cutting edge 202 and the diamond composite sheet 201 on the drill body 203 are protected, the damage caused by strong thrust is avoided, the drilling machine can be stopped to be pushed, the drill is rotated, after the drill handle 1 does not rotate, the drill can be pulled out, the drill is not under pressure, the spring 705 pushes the second sliding ring 703 to reset, the push rod 608 is pushed to reset, the inner gear 606 and the outer gear 607 are meshed again, the next work is facilitated, and the drill body 203 can be replaced at the moment.

Specifically, the crushing structure 2 comprises a bit body 203, the top end of the drill shank 1 is provided with the bit body 203, the top end of the bit body 203 is fixedly connected with a plurality of cutting edges 202, the cutting edges 202 are fixedly connected with a plurality of diamond composite sheets 201, the diamond composite sheets 201 are circular, and the diamond composite sheets 201 are arranged in an arc shape; the bit body 203 rotates to drive the diamond compact 201 on the cutting edge 202 to rotate, and the diamond compact 201 is abutted against the rock, so that the rock can be crushed and drilled.

Specifically, the transmission structure 6 includes a fixed block 601, the drill shank 1 is rotatably connected with the fixed block 601, a push rod 608 is fixedly connected inside the fixed block 601, two pairs of first sliding grooves 604 are arranged at one end inside the drill shank 1, the drill shank 1 is slidably connected with a first sliding ring 603 through the first sliding grooves 604, a first bearing 605 is fixedly connected inside the first sliding ring 603, an inner ring of the first bearing 605 is fixedly connected with the push rod 608, an inner gear 606 is fixedly connected inside the drill shank 1, an outer gear 607 is fixedly connected with the drill shank 1, the inner gear 606 is engaged with the outer gear 607, one end of the push rod 608 is fixedly connected with an inner ring of the second bearing 704, a stop ring 609 is fixedly connected to one end of the push rod 608, the stop ring 609 abuts against the inner ring of the second bearing 704, a fixing groove 602 is arranged on the bit body 203, the fixed block 601 is sleeved with the bit body 203 through the fixing groove 602, the fixing block 601 is in a quadrangular prism shape, the fixing groove 602 is in a quadrangular prism shape, the length of the first sliding groove 604 is greater than that of the internal gear 606, the thickness of the internal gear 606 is greater than that of the external gear 607, the first sliding ring 603 and the second sliding ring 703 are both in a ring shape, and two pairs of protrusions distributed in a cross shape are fixedly connected to the outer parts of the first sliding ring 603 and the second sliding ring 703; the drill handle 1 is fixed on a drilling machine, so that rock can be crushed and drilled, the drilling machine drives the drill handle 1 to rotate, the drill handle 1 drives the outer gear 607 to move through the inner gear 606, the push rod 608 is driven to rotate, the fixing block 601 is driven to rotate, and power is provided for the drill body 203.

Specifically, the dismounting structure 3 includes a first bolt 301, a plurality of first bolts 301 are connected to the bit body 203 in a threaded manner, a plurality of interference grooves 302 are formed in the fixing block 601, and the first bolts 301 are abutted against the fixing block 601 through the interference grooves 302; the bit body 203 is installed on the drill shank 1, the bit body 203 is sleeved on the fixing block 601 through the fixing groove 602, the first bolt 301 on the bit body 203 is screwed, the first bolt 301 moves towards the fixing block 601 and is abutted against the fixing block 601 through the abutting groove 302, and therefore the bit body 203 is firmly fixed on the fixing block 601, different types of rock strata can be replaced conveniently, and the crushing requirement can be met.

Specifically, the limiting structure 4 comprises a second bolt 401, the second bolt 401 is rotatably connected to two sides of the drill shank 1, the second bolt 401 is in threaded connection with a limiting block 402, a pair of placing grooves 403 is arranged on the drill shank 1, the limiting block 402 is in sliding connection with the drill shank 1 through the placing grooves 403, and one end of the limiting block 402 is abutted against the outer ring of the second bearing 704; when the drill bit does not need to be protected, the second bolt 401 can be rotated, so that the second bolt 401 drives the limit block 402 to move along the placement groove 403 in a threaded manner, the limit block 402 extends into the second sliding groove 702 and is abutted against the bottom of the second sliding ring 703, the movement of the second sliding ring 703 is prevented, the movement of the push rod 608 is limited, and when the drill bit body 203 is in contact with harder rocks, protection cannot be performed.

Specifically, the adjusting structure 5 comprises an adjusting groove 502, the bottom end of the drill shank 1 is provided with the adjusting groove 502, the drill shank 1 is connected with an adjusting nut 501 through the adjusting groove 502, the adjusting nut 501 is in threaded connection with the drill shank 1, the top end of the adjusting nut 501 is abutted against the bottom end of the sliding block 701, and the inner wall of the drill shank 1, which is located in the adjusting groove 502, is fixedly connected with a marker post 503; after the bit body 203 is installed, the pressure bearing capacity of the drill bit needs to be adjusted according to the rock hardness which can be borne by the diamond compact 201 and the cutting edge 202 on the bit body 203, the adjusting nut 501 rotates and moves in the adjusting groove 502, so that the spring 705 is compressed or released, the pressure bearing capacity can be accurately adjusted according to the mark post 503, and the drill bit is protected.

When the drill bit is used, firstly, the drill bit body 203 is installed on the drill shank 1, the drill bit body 203 is sleeved on the fixed block 601 through the fixing groove 602, the first bolt 301 on the drill bit body 203 is screwed, the first bolt 301 moves towards the direction of the fixed block 601 and is abutted against the fixed block 601 through the abutting groove 302, so that the drill bit body 203 is firmly fixed on the fixed block 601, different drill bit bodies 203 can be replaced for different types of rock layers, and the crushing requirement is met, after the installation of the drill bit body 203 is completed, the pressure bearing size of the drill bit is adjusted according to the rock hardness which can be borne by the diamond composite sheet 201 and the cutting edge 202 on the drill bit body 203, the adjusting nut 501 is rotated and moves in the adjusting groove 502, so that the spring 705 is compressed or released, the pressure bearing size can be accurately adjusted according to the standard rod 503, so that the drill bit can be protected, the drill handle 1 is fixed on a drilling machine, rock can be crushed and drilled, the drilling machine drives the drill handle 1 to rotate, the drill handle 1 drives the outer gear 607 to move through the inner gear 606, the push rod 608 is driven to rotate, the fixing block 601 is driven to rotate, power can be provided for the drill body 203, the drill body 203 rotates, the diamond composite sheet 201 on the cutting edge 202 is driven to rotate, the diamond composite sheet 201 is abutted against the rock, the rock can be crushed and drilled, rock formations with different depths are different, the hardness degrees of the rock formations are different, the same drill bit cannot meet requirements, when the hardness of the rock formations exceeds the hardness which can be borne by the diamond composite sheet 201 on the drill cutting edge 202, the rock formations cannot be continuously crushed, the drill bit cannot be pushed, the drilling machine still provides thrust for the drill bit at the moment, and the drill body 203 is forced to push the fixing block 601 to move towards the inside of the drill handle 1, the push rod 608 is moved towards the inside of the drill shank 1, when the thrust reaches the pressure set by the spring 705, the first bearing 605 slides along the first sliding groove 604 under the action of the first sliding ring 603, so as to drive the external gear 607 to be separated from the internal gear 606, the second sliding ring 703 slides in the second sliding groove 702 under the cooperation of the baffle ring 609 and the second bearing 704, so as to compress the spring 705, at this time, the external gear 607 is separated from the internal gear 606, the drill shank 1 rotates, so as not to drive the fixed block 601 to rotate, so as to enable the drill shank 1 to rotate along with the drill, while the fixed block 601 and the drill body 203 do not rotate, so as to protect the cutting edge 202 and the diamond compact 201 on the drill body 203, avoid being damaged under strong thrust, so as to stop the propulsion and rotation of the drill, when the drill shank 1 does not rotate, the drill bit can be pulled out, at this time, the drill bit is not under pressure, the spring 705 pushes the second slip ring 703 to reset, the push rod 608 is pushed to reset, the internal gear 606 and the external gear 607 are meshed again, the next work is facilitated, at this time, the bit body 203 can be replaced, when the drill bit does not need to be protected, the second bolt 401 can be rotated, the second bolt 401 drives the limiting block 402 to move along the placing groove 403 in a threaded mode, the limiting block 402 extends into the second sliding groove 702 and is abutted against the bottom of the second slip ring 703, the movement of the second slip ring 703 is prevented, the movement of the push rod 608 is limited, and when the bit body 203 is in contact with harder rocks, protection cannot be performed.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (10)

1. The drill bit with the protection function for crushing the hard rock stratum is characterized by comprising a drill handle (1), wherein the drill handle (1) is connected with a crushing structure (2) for crushing the hard rock stratum, the crushing structure (2) is connected with a dismounting structure (3) for dismounting and replacing the crushing structure (2), and the drill handle (1) is connected with a transmission structure (6) for power transmission of the crushing structure (2); dismouting structure (3) include first bolt (301), be equipped with a plurality of conflict grooves (302) on fixed block (601) of transmission structure (6), first bolt (301) are contradicted through conflict groove (302) and fixed block (601).

2. Hard rock breaking drill bit according to claim 1, characterized by a control structure (7), which control structure (7) is mounted on the drill shank (1) for protecting the breaking structure (2); the control structure (7) comprises a sliding block (701) arranged inside the drill handle (1), two pairs of second sliding grooves (702) are arranged inside the drill handle (1), the sliding block (701) is connected with the drill handle (1) in a sliding mode through the second sliding grooves (702), a second sliding ring (703) is further connected inside the drill handle (1) in a sliding mode through the second sliding grooves (702), a spring (705) is fixedly connected between the second sliding ring (703) and the sliding block (701), a second bearing (704) is fixedly connected inside the second sliding ring (703), and an inner ring of the second bearing (704) is connected with the transmission structure (6).

3. Hard rock breaking bit with shielding function according to claim 2, characterized in that the diameter of the spring (705) is larger than the diameter of the outer ring of the second bearing (704), and the length of the second runner (702) is larger than the distance between the second slip ring (703) and the slider (701).

4. Hard rock breaking drill bit with protective function according to claim 2, characterized in that the breaking structure (2) comprises a bit body (203), the bit body (203) being arranged at the top end of the shank (1); the top fixedly connected with of drill bit body (203) a plurality of cutting edges (202), a plurality of diamond compact pieces (201) of fixedly connected with on cutting edge (202), diamond compact piece (201) are circular form, and are a plurality of diamond compact piece (201) are the arc and arrange.

5. The hard rock breaking drill bit with protection function according to claim 4, characterized in that the transmission structure (6) further comprises a push rod (608), the push rod (608) is fixedly arranged inside the fixed block (601); two pairs of first sliding grooves (604) are formed in one end of the interior of the drill handle (1), the drill handle (1) is connected with a first sliding ring (603) in a sliding mode through the first sliding grooves (604), a first bearing (605) is fixedly connected inside the first slip ring (603), the inner ring of the first bearing (605) is fixedly connected with a push rod (608), an inner gear (606) is fixedly connected inside the drill handle (1), an outer gear (607) is fixedly connected with the drill handle (1), the inner gear (606) is meshed with the outer gear (607), one end of the push rod (608) is fixedly connected with the inner ring of the second bearing (704), one end of the push rod (608) is fixedly connected with a baffle ring (609), the baffle ring (609) is abutted with the inner ring of the second bearing (704), and a fixing groove (602) is formed in the bit body (203), and the fixing block (601) is sleeved with the bit body (203) through the fixing groove (602).

6. The hard rock stratum breaking drill bit with the protection function as claimed in claim 5, characterized in that the fixing block (601) is in a quadrangular prism shape, and the fixing groove (602) is in a quadrangular prism shape.

7. The hard rock breaking bit with a shield function according to claim 5, wherein the length of the first sliding groove (604) is greater than the length of the inner gear (606), and the thickness of the inner gear (606) is greater than the thickness of the outer gear (607).

8. Hard rock breaking drill bit with protection according to claim 5, characterized in that the first sliding ring (603) and the second sliding ring (703) are both ring-shaped, and two pairs of protrusions distributed in a cross shape are fixedly connected to the outside of the first sliding ring (603) and the second sliding ring (703).

9. The hard rock stratum breaking drill bit with the protection function according to claim 2, further comprising a limiting structure (4), wherein the limiting structure (4) comprises a second bolt (401), the second bolt (401) is arranged on two sides of the drill shank (1), a limiting block (402) is in threaded connection with the second bolt (401), a pair of placing grooves (403) is arranged on the drill shank (1), the limiting block (402) is in sliding connection with the drill shank (1) through the placing grooves (403), and one end of the limiting block (402) and an outer ring of the second bearing (704) are abutted against each other.

10. The hard rock stratum breaking drill bit with the protection function is characterized by further comprising an adjusting structure (5), the adjusting structure (5) comprises an adjusting groove (502), the adjusting groove (502) is arranged at the bottom end of the drill shank (1), the drill shank (1) is connected with an adjusting nut (501) through the adjusting groove (502), the adjusting nut (501) is in threaded connection with the drill shank (1), the top end of the adjusting nut (501) is abutted against the bottom end of the sliding block (701), and a marker post (503) is fixedly connected to the inner wall, located in the adjusting groove (502), of the drill shank (1).

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