A construction engineering drilling tool

Abstract

The present invention relates to the technical field of drilling devices, and in particular to a construction engineering drill, comprising a frame and a drilling mechanism, wherein the drilling mechanism is mounted on the frame, and the drilling mechanism comprises a first drill rod, a second drill rod and a drill bit. The first drill rod, the second drill rod and the drill bit are sequentially arranged in a first direction and are interconnected. A construction engineering drill of the present invention arranges a drilling mechanism on the frame, and when the drill bit hits a hard soil layer or a hard object such as a stone, the friction between the drill bit and the hard object will increase, and the first drill rod can reciprocate in the first direction relative to the second drill rod, and the first drill rod is used to apply an impact force to the second drill rod, thereby loosening the hard soil layer blocking the drill bit, breaking the hard objects such as the stone blocking the drill bit, reducing the resistance of the drill bit, making it easier for the drill bit to drill, and allowing the drilling operation to proceed normally.

Description

Technical Field

[0001] The invention relates to the technical field of drilling devices, and in particular to a drilling tool for construction engineering. Background Art

[0002] In the process of engineering construction, in order to ensure the stability and safety of the building, the foundation will be treated, and drilling is one of the commonly used foundation treatment methods. In addition, drilling can also be used to install various facilities, such as pipelines and cables.

[0003] A borer is a commonly used drilling device that uses a tool that is harder and sharper than the target object to leave a cylindrical hole or hole on the target object through rotary cutting or rotary extrusion. When the borer in the prior art encounters hard objects such as hard soil layers or stones when drilling holes in the ground, it will affect the normal drilling and increase the difficulty of drilling. Summary of the invention

[0004] The invention provides a construction engineering drilling tool to solve the problem that when the existing drilling tool encounters hard objects such as hard soil layers or stones when drilling holes in the ground, the normal drilling will be affected, increasing the difficulty of drilling.

[0005] A construction engineering drill of the present invention adopts the following technical scheme: a construction engineering drill comprises a frame and a drilling mechanism, the drilling mechanism is installed on the frame, the drilling mechanism comprises a first drill rod, a second drill rod and a drill bit; the first drill rod, the second drill rod and the drill bit are arranged in sequence in a first direction and are connected to each other, the first direction is a vertical direction, and the drill bit is located on a side of the first drill rod close to the ground in the first direction; the first drill rod, the second drill rod and the drill bit can all move along the first direction and can rotate around the first direction; the drilling mechanism has a first state and a second state, when in the first state, the first drill rod rotates around the first direction to drive the second drill rod and the drill bit to rotate synchronously, when in the second state, the first drill rod can rotate around the first direction relative to the second drill rod and the drill bit, and when the drilling mechanism is in the second state, the first drill rod can reciprocate in the first direction relative to the second drill rod and the drill bit.

[0006] Furthermore, one end of the first drill rod and the second drill rod close to each other in the first direction are both configured as wave surfaces, and the first drill rod can be docked with the second drill rod, and the wave surface of the first drill rod is fitted with the wave surface of the second drill rod.

[0007] Furthermore, the drill bit can move in a first direction relative to the second drill rod and rotate synchronously with the second drill rod around the first direction; the drill bit is connected to the second drill rod through a first elastic member, the first elastic member is arranged along the first direction, and the first elastic member is compressed only when encountering an object with a hardness greater than a preset value, a sensor is arranged on the drill bit, and a locking member is arranged on the first drill rod, the locking member has a locked state and an unlocked state, when in the locked state, the locking member limits the first drill rod from moving in the first direction relative to the second drill rod, and when in the unlocked state, the locking member allows the first drill rod to move in the first direction relative to the second drill rod; the sensor is electrically connected to the locking member, and when the drill bit moves a preset distance along the first direction to the side close to the second drill rod, the sensor can switch the locking member from the locked state to the unlocked state.

[0008] Furthermore, a second driving member is provided on the frame, and a screw is fixedly provided at the output end of the second driving member. The second driving member can drive the screw to rotate around a first direction. A sleeve is sleeved on the screw, and the sleeve is sleeved on the screw and spirally matched with the screw, and the sleeve can only move along the first direction on the screw; the sleeve and the locking member are connected by a movable frame.

[0009] Furthermore, a sliding groove is provided on the frame, the sliding groove is arranged along the first direction, and the movable frame is slidably installed on the sliding groove.

[0010] Furthermore, the locking member includes an inner cylinder, an outer cylinder and an electromagnetic assembly, the outer cylinder and the inner cylinder are connected through the electromagnetic assembly, the electromagnetic assembly is electrically connected to the sensor, the outer cylinder is fixed to the movable frame, the inner cylinder is sleeved in the outer cylinder, and can move relative to the outer cylinder in a first direction; the first drill rod is sleeved in the inner cylinder, the first drill rod can move synchronously with the inner cylinder in the first direction, and rotate around the first direction relative to the inner cylinder; and when the electromagnetic assembly is powered on, the electromagnetic assembly can lock the inner cylinder and the outer cylinder, and restrict the inner cylinder from moving relative to the outer cylinder in the first direction; when the electromagnetic assembly is powered off, the electromagnetic assembly can unlock the inner cylinder and the outer cylinder, and allow the inner cylinder to move relative to the outer cylinder in the first direction; in the initial state, the electromagnetic assembly is in a powered state.

[0011] Furthermore, the electromagnetic assembly includes two electromagnets, and the two electromagnets are respectively arranged on the outer cylinder and the inner cylinder.

[0012] Furthermore, a limiting shaft is provided at one end of the first drill rod close to the second drill rod in the first direction, and the limiting shaft is provided along the first direction and is fixedly connected to the first drill rod; a limiting ring is provided on the limiting shaft, and the limiting ring can move synchronously with the limiting shaft along the first direction and rotate around the first direction relative to the limiting shaft; the second drill rod includes a second shaft body and a second spiral sheet, and the second shaft body is provided along the first direction, and the two ends of the second spiral sheet along the first direction are respectively called the first end and the second end, the first end is located on the side of the second end close to the first drill rod in the first direction, the first end is slidably connected to the second shaft body, and the second end is fixedly connected to the second shaft body, and the limiting ring can drive the first end to slide in the first direction.

[0013] Furthermore, a sliding groove and a retaining groove are provided on the second shaft body, and both the sliding groove and the retaining groove are arranged along the first direction, and the sliding groove is located on the side of the retaining groove close to the central axis of the second shaft body in the second direction, and the second direction is the radial direction of the second shaft body; a sliding plate is provided on the limiting ring, and the sliding plate is slidably installed in the sliding groove, and the size of the sliding plate in the first direction is larger than the size of the retaining groove in the first direction, and a connecting block is provided on the sliding plate, and the connecting block is fixedly connected to the first end of the second spiral sheet after passing through the retaining groove.

[0014] Further, a rotation groove is provided on the limiting shaft, and the rotation groove is located on the side of the limiting shaft close to the second drill rod in the first direction. The rotation groove is a vortex structure, and the rotation groove has a head end and a tail end, and the head end extends outward to the tail end around the spiral line in the first direction, and the head end is located on the side of the tail end close to the vortex center of the rotation groove, and the head end and the tail end are arranged in sequence in the second direction and are connected to each other. A second chamber is provided on the second drill rod, and a second elastic member is arranged in the second chamber, and the second elastic member is arranged along the first direction. A sliding column is provided at one end of the second elastic member close to the rotation groove in the first direction, and the sliding column is slidably installed in the rotation groove; in the initial state, the sliding column is located at the head end of the rotation groove, and the end of the second elastic member close to the second drill rod in the first direction is fixed to the second drill rod; and when the limiting shaft rotates around the first direction, it can promote the second elastic member to rotate around the second direction, and make the size of the second elastic member in the first direction smaller and the size in the second direction larger, and when the limiting shaft rotates around the first direction by a preset angle, in the process of the first drill rod moving along the first direction to the side close to the second drill rod, the sliding column can slide to the tail end of the rotation groove.

[0015] The beneficial effects of the present invention are as follows: a construction engineering drilling device of the present invention arranges a drilling mechanism on a frame. When in use, the first drill rod, the second drill rod and the drill bit are driven to move in a first direction toward the side close to the ground, and the first drill rod is driven to rotate around the first direction. When the drill bit does not hit a hard soil layer or hard objects such as stones, the drilling mechanism is in a first state. At this time, the rotation of the first drill rod around the first direction will drive the second drill rod to rotate synchronously, and further drive the drill bit to rotate, thereby realizing the drilling of the soil by the drilling mechanism, and the drilling operation can be carried out normally. When the drill bit hits a hard soil layer or a hard object such as a stone, the friction between the drill bit and the hard object will increase, the rotation of the second drill rod and the drill bit will be blocked, and the drilling mechanism will switch to the second state. The first drill rod and the second drill rod will rotate relative to each other, and at this time the first drill rod can reciprocate in the first direction relative to the second drill rod. In the process of the first drill rod reciprocating in the soil along the first direction, the first drill rod will scrape the inner circumferential wall surface of the soil flat, reducing the friction between the first drill rod and the soil during the movement along the first direction, and when the first drill rod moves along the first direction toward the side close to the second drill rod, the first drill rod can apply an impact force to the second drill rod, thereby loosening the hard soil layer blocking the drill bit and breaking hard objects such as stones blocking the drill bit, reducing the resistance of the drill bit, making it easier for the drill bit to drill, and allowing the drilling operation to proceed normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 A schematic diagram of the structure of an embodiment of a construction engineering drilling tool of the present invention;

[0018] Figure 2 A front view of the structure of an embodiment of a construction engineering drilling tool of the present invention;

[0019] Figure 3 for Figure 2 Sectional view along AA;

[0020] Figure 4 for Figure 3 The enlarged view of point B in the middle;

[0021] Figure 5 for Figure 3 Enlarged view of point C in the middle;

[0022] Figure 6 A disassembled diagram of a drilling mechanism of an embodiment of a construction engineering drilling tool of the present invention;

[0023] Figure 7 A schematic diagram of a first drill rod of an embodiment of a construction engineering drilling tool of the present invention;

[0024] Figure 8 for Figure 7 The enlarged view of point D in the middle;

[0025] Fig. 9 A schematic diagram of a first drill rod of an embodiment of a construction engineering drilling tool of the present invention at another viewing angle;

[0026] Fig.10 for Fig. 9 Enlarged view of point E in the middle;

[0027] Fig.11 A schematic diagram of a second drill rod of an embodiment of a construction engineering drilling tool of the present invention;

[0028] Fig.12 for Fig.11 Cross-sectional view along the middle edge FF.

[0029] In the figure: 100, frame; 110, first driving member; 120, second driving member; 130, screw; 140, sleeve; 150, movable frame; 200, drilling mechanism; 210, first drill rod; 220, second drill rod; 221, first chamber; 222, first slide groove; 223, slide groove; 224, retaining groove; 225, second chamber; 230, drill bit; 231, first slider; 240, first elastic member; 250, locking member; 251, outer cylinder; 252, inner cylinder; 260, limiting shaft; 270, limiting ring; 271, sliding plate; 272, connecting block; 280, rotating groove; 281, head end; 282, tail end; 290, second elastic member; 291, sliding column. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] An embodiment of a construction engineering drilling tool of the present invention is as follows Figures 1 to 12 shown.

[0032] A construction engineering drilling device includes a frame 100 and a drilling mechanism 200, wherein the drilling mechanism 200 is mounted on the frame 100 and includes a first drill rod 210, a second drill rod 220 and a drill bit 230. The first drill rod 210, the second drill rod 220 and the drill bit 230 are sequentially arranged in a first direction and connected to each other, wherein the first direction is a vertical direction, and the drill bit 230 is located on a side of the first drill rod 210 close to the ground in the first direction. The first drill rod 210, the second drill rod 220 and the drill bit 230 can all move along the first direction and can rotate around the first direction. The drilling mechanism 200 has a first state and a second state. When in the first state, the first drill rod 210 rotates around the first direction to drive the second drill rod 220 and the drill bit 230 to rotate synchronously. When in the second state, the first drill rod 210 can rotate around the first direction relative to the second drill rod 220 and the drill bit 230, and when the drilling mechanism 200 is in the second state, the first drill rod 210 can reciprocate in the first direction relative to the second drill rod 220 and the drill bit 230.

[0033] Specifically, a first driving member 110 is disposed on the frame 100 , and the first drill rod 210 is fixedly installed at the output end of the first driving member 110 . The first driving member 110 can drive the first drill rod 210 to rotate around a first direction, and the first driving member 110 is a motor.

[0034] In this embodiment, a drilling mechanism 200 is arranged on the frame 100. When in use, the first drill rod 210, the second drill rod 220 and the drill bit 230 are driven to move in the first direction toward the ground, and the first drill rod 210 is driven to rotate around the first direction. When the drill bit 230 does not hit a hard soil layer or hard objects such as stones, the drilling mechanism 200 is in a first state. At this time, the rotation of the first drill rod 210 around the first direction will drive the second drill rod 220 to rotate synchronously, and further drive the drill bit 230 to rotate, so that the drilling mechanism 200 can drill the soil, and the drilling operation can be carried out normally. When the drill bit 230 hits a hard soil layer or a hard object such as a stone, the friction between the drill bit 230 and the hard object will increase, the rotation of the second drill rod 220 and the drill bit 230 will be blocked, and the drilling mechanism 200 will switch to the second state. The first drill rod 210 and the second drill rod 220 will rotate relative to each other, and at this time, the first drill rod 210 can reciprocate in the first direction relative to the second drill rod 220. During the reciprocating movement of the first drill rod 210 in the soil along the first direction, the first drill rod 210 will scrape the inner wall surface of the soil flat, reducing the friction between the first drill rod 210 and the soil during the movement along the first direction. When the first drill rod 210 moves along the first direction toward the side close to the second drill rod 220, the first drill rod 210 can apply an impact force to the second drill rod 220, thereby loosening the hard soil layer blocking the drill bit 230 and breaking the hard objects such as stones blocking the drill bit 230, reducing the resistance of the drill bit 230, making it easier for the drill bit 230 to drill, and allowing the drilling operation to proceed normally.

[0035] In this embodiment, the ends of the first drill rod 210 and the second drill rod 220 that are close to each other in the first direction are both set as wave surfaces, and the first drill rod 210 can be docked with the second drill rod 220, and the wave surface of the first drill rod 210 is in contact with the wave surface of the second drill rod 220.

[0036] In this embodiment, the ends of the first drill rod 210 and the second drill rod 220 that are close to each other in the first direction are both set to be corrugated. When the drilling mechanism 200 is in the first state, the corrugated end of the first drill rod 210 is connected to the corrugated end of the second drill rod 220. Therefore, the rotation of the first drill rod 210 around the first direction will drive the second drill rod 220 to rotate synchronously through the wave surface. When the first drill rod 210 rotates relative to the second drill rod 220, the first drill rod 210 will rise or fall along the wave surface of the second drill rod 220, thereby realizing the reciprocating movement of the first drill rod 210 relative to the second drill rod 220 in the first direction.

[0037] In this embodiment, the drill bit 230 can move along the first direction relative to the second drill rod 220, and rotate synchronously with the second drill rod 220 around the first direction. The drill bit 230 is connected to the second drill rod 220 through the first elastic member 240, and the first elastic member 240 is arranged along the first direction. The first elastic member 240 always has a tendency to urge the drill bit 230 to move along the first direction to the side away from the second drill rod 220. The first elastic member 240 is a spring, and the first elastic member 240 is compressed only when encountering an object with a hardness greater than a preset value.

[0038] A sensor is provided on the drill bit 230, and a locking member 250 is provided on the first drill rod 210. The locking member 250 has a locked state and an unlocked state. When in the locked state, the locking member 250 restricts the first drill rod 210 from moving in the first direction relative to the second drill rod 220, and when in the unlocked state, the locking member 250 allows the first drill rod 210 to move in the first direction relative to the second drill rod 220. The sensor is electrically connected to the locking member 250, and wiring channels are provided on the first drill rod 210 and the second drill rod 220 for connecting wires between the sensor and the locking member 250. When the drill bit 230 moves a preset distance along the first direction toward a side close to the second drill rod 220, the sensor can switch the locking member 250 from the locked state to the unlocked state.

[0039] Specifically, the sensor is arranged at one end of the drill bit 230 close to the second drill rod 220 along the first direction, a first chamber 221 is opened on the second drill rod 220, the drill bit 230 is installed in the first chamber 221, and a plurality of first slide grooves 222 are opened on the inner wall surface of the first chamber 221. The plurality of first slide grooves 222 are evenly distributed around the first direction in the first chamber 221, and the first slide grooves 222 are arranged along the first direction. A plurality of first sliders 231 are evenly distributed in the circumferential direction of the drill bit 230, and the plurality of first sliders 231 are arranged one-to-one with the plurality of first slide grooves 222. Each first slider 231 is slidably installed in the corresponding first slide groove 222, so that the drill bit 230 can move relative to the second drill rod 220 along the first direction and rotate synchronously with the second drill rod 220 around the first direction.

[0040] When in use, by setting the elastic coefficient of the first elastic member 240, the first elastic member 240 is compressed only when encountering an object with a hardness greater than a preset value, that is, the first elastic member 240 can be compressed when encountering a hard object such as a hard soil layer or a stone. After the first elastic member 240 is compressed by a preset distance, the sensor will switch the locking member 250 from a locked state to an unlocked state, so that the first drill rod 210 can move in the first direction relative to the second drill rod 220.

[0041] In this embodiment, a second driving member 120 is provided on the frame 100, a lead screw 130 is fixedly provided at the output end of the second driving member 120, and the second driving member 120 can drive the lead screw 130 to rotate around a first direction, and the second driving member 120 is a motor. A sleeve 140 is sleeved on the lead screw 130, and the sleeve 140 is sleeved and screwed with the lead screw 130, and the sleeve 140 can only move along the first direction on the lead screw 130. The sleeve 140 is connected to the locking member 250 through a moving frame 150.

[0042] Specifically, a sliding groove 223 is provided on the frame 100, and the sliding groove 223 is arranged along the first direction. The movable frame 150 is slidably installed on the sliding groove 223. The sliding groove 223 can limit the rotation of the movable frame 150 around the first direction, and then limit the rotation of the sleeve 140 fixed to the movable frame 150 around the first direction, so that the sleeve 140 can only move along the first direction on the screw 130.

[0043] In this embodiment, a second driving member 120 is provided. When in use, the second driving member 120 is started to cause the lead screw 130 to rotate around the first direction. Since the limiting sleeve 140 of the movable frame 150 cannot rotate around the first direction, the rotation of the lead screw 130 will cause the sleeve 140 spirally matched therewith to move along the first direction. The movement of the movable frame 150 will drive the locking member 250 to move, and then drive the first drill rod 210, the second drill rod 220 and the drill bit 230 to move along the first direction through the locking member 250.

[0044] In this embodiment, the locking member 250 includes an inner cylinder 252, an outer cylinder 251 and an electromagnetic assembly. The outer cylinder 251 is connected to the inner cylinder 252 through the electromagnetic assembly. The electromagnetic assembly is electrically connected to the sensor. The outer cylinder 251 is fixed to the mobile frame 150. The inner cylinder 252 is sleeved in the outer cylinder 251 and can move relative to the outer cylinder 251 in a first direction. The first drill rod 210 is sleeved in the inner cylinder 252. The first drill rod 210 can move synchronously with the inner cylinder 252 in the first direction and rotate around the first direction relative to the inner cylinder 252. When the electromagnetic assembly is powered on, the electromagnetic assembly can lock the inner cylinder 252 and the outer cylinder 251, and limit the inner cylinder 252 from moving relative to the outer cylinder 251 in the first direction. When the electromagnetic assembly is powered off, the electromagnetic assembly can unlock the inner cylinder 252 and the outer cylinder 251, allowing the inner cylinder 252 to move relative to the outer cylinder 251 in the first direction. In the initial state, the electromagnetic assembly is in a powered state.

[0045] Specifically, the electromagnetic assembly includes two electromagnets, which are respectively arranged on the outer cylinder 251 and the inner cylinder 252. A first protrusion is arranged in the circumferential direction of the first drill rod 210, and the first protrusion is an annular structure. A first annular groove is arranged on the inner wall of the inner cylinder 252. The first protrusion and the first annular groove are rotatably matched, so that the first drill rod 210 can move synchronously with the inner cylinder 252 in the first direction and rotate relative to the inner cylinder 252 around the first direction.

[0046] In this embodiment, the outer cylinder 251 and the inner cylinder 252 are connected by an electromagnet. In the initial state, the electromagnet is energized. When the electromagnet is energized, the inner cylinder 252 and the outer cylinder 251 are attracted to limit the relative movement of the inner cylinder 252 and the outer cylinder 251 in the first direction. When the first elastic member 240 encounters a hard soil layer or a hard object such as a stone and is compressed a preset distance, the sensor can feed back the induced signal to the electromagnet to cut off the power of the electromagnet. After the electromagnet is cut off, the magnetic force between the inner cylinder 252 and the outer cylinder 251 disappears, allowing the inner cylinder 252 and the outer cylinder 251 to move relative to each other in the first direction.

[0047] In this embodiment, a limiting shaft 260 is provided at one end of the first drill rod 210 close to the second drill rod 220 in the first direction, and the limiting shaft 260 is provided along the first direction and fixedly connected to the first drill rod 210. A limiting ring 270 is provided on the limiting shaft 260, and the limiting ring 270 can move synchronously with the limiting shaft 260 along the first direction and rotate around the first direction relative to the limiting shaft 260. The first drill rod 210 includes a first shaft body and a first spiral piece, the first shaft body is provided along the first direction, and the first spiral piece is fixedly installed on the first shaft body. The second drill rod 220 includes a second shaft body and a second spiral piece, the second shaft body is provided along the first direction, and the two ends of the second spiral piece along the first direction are respectively referred to as the first end and the second end, the first end is located on the side of the second end close to the first drill rod 210 in the first direction, the first end is slidably connected to the second shaft body, and the second end is fixedly connected to the second shaft body, and the limiting ring 270 can drive the first end to slide in the first direction.

[0048] Specifically, the second shaft body is provided with a sliding groove 223 and a retaining groove 224, both of which are arranged along the first direction, and the sliding groove 223 is located on the side of the retaining groove 224 close to the central axis of the second shaft body in the second direction, and the second direction is the radial direction of the second shaft body. The limiting ring 270 is provided with a sliding plate 271, which is slidably installed in the sliding groove 223, and the size of the sliding plate 271 in the first direction is larger than the size of the retaining groove 224 in the first direction. The sliding plate 271 is provided with a connecting block 272, which passes through the retaining groove 224 and is fixedly connected to the first end of the second spiral plate.

[0049] More specifically, a second protrusion is arranged in the circumferential direction of the limiting shaft 260, and the second protrusion is an annular structure. A second annular groove is opened on the inner circumferential wall surface of the limiting ring 270, and the second annular groove and the second protrusion are rotatably matched, so that the limiting ring 270 can move synchronously with the limiting shaft 260 along the first direction, and rotate around the first direction relative to the limiting shaft 260.

[0050] In this embodiment, a limiting shaft 260 is provided. When in use, when the first drill rod 210 moves along the first direction relative to the second drill rod 220, the movement of the first drill rod 210 will drive the limiting shaft 260 to move synchronously, and then drive the limiting ring 270 to move. The movement of the limiting ring 270 will drive the sliding plate 271 to move in the sliding groove 223, and drive the connecting block 272 to move in the retaining groove 224 through the sliding plate 271. The movement of the connecting block 272 will drive the first end of the second spiral piece fixed thereto to move, thereby changing the pitch of the second spiral piece in the first direction, so that the soil and stones between the second spiral pieces can be loosened, preventing the stones from being stuck on the second spiral piece and increasing the resistance of drilling.

[0051] In another possible embodiment, a rotation groove 280 is provided on the limit shaft 260, and the rotation groove 280 is located on the side of the limit shaft 260 close to the second drill rod 220 in the first direction. The rotation groove 280 is a vortex structure, and the rotation groove 280 has a head end 281 and a tail end 282. The head end 281 extends outward to the tail end 282 around the spiral line in the first direction, and the head end 281 is located on the side of the tail end 282 close to the vortex center of the rotation groove 280, and the head end 281 and the tail end 282 are arranged in sequence in the second direction and are connected to each other.

[0052] The second drill rod 220 is provided with a second chamber 225, in which a second elastic member 290 is arranged. The second elastic member 290 is arranged along the first direction. The second elastic member 290 is a spring. A sliding column 291 is arranged at one end of the second elastic member 290 close to the rotation groove 280 in the first direction. The sliding column 291 is slidably installed in the rotation groove 280. In the initial state, the sliding column 291 is located at the head end 281 of the rotation groove 280, and the end of the second elastic member 290 close to the second drill rod 220 in the first direction is fixedly connected to the second drill rod 220. When the limiting shaft 260 rotates around the first direction, the second elastic member 290 can be driven to rotate around the second direction, and the size of the second elastic member 290 in the first direction becomes smaller and the size in the second direction becomes larger. When the limiting shaft 260 rotates around the first direction by a preset angle, the sliding column 291 can slide to the tail end 282 of the rotation groove 280 during the process of the first drill rod 210 moving along the first direction to the side close to the second drill rod 220.

[0053] Specifically, a boss is defined between the head end 281 and the tail end 282 of the rotation groove 280 , and the sliding column 291 abuts against the boss in an initial state, thereby enabling the second elastic member 290 to rotate synchronously when the limiting shaft 260 rotates around the first direction.

[0054] In this embodiment, by setting the rotation groove 280 and the second elastic member 290, when the first drill rod 210 rotates relative to the second drill rod 220 around the first direction, the rotation of the first drill rod 210 will drive the limiting shaft 260 to rotate, and then the second elastic member is caused to rotate synchronously through the boss defined between the head end 281 and the tail end 282 of the rotation groove 280. By setting the rotation direction of the second elastic member 290, when the second elastic member 290 rotates with the limiting shaft 260, the size of the entire second elastic member 290 in the first direction becomes smaller and the size in the second direction gradually becomes larger. The increase in the size of the member 290 in the second direction will cause the sliding column 291 to slide in the rotating groove 280, that is, to slide from the head end 281 of the rotating groove 280 to the tail end 282 of the rotating groove 280 along the second direction. When the sliding column 291 slides to the tail end 282 of the rotating groove 280, under the action of the second elastic member 290, the reaction force of the second elastic member 290 will cause the sliding column 291 to rotate and reset at the tail end 282 of the rotating groove 280 until the sliding column 291 slides in the opposite direction in the rotating groove 280 and returns to the tail end 282 of the rotating groove 280 again.

[0055] Before use, it can be arranged that when the limit shaft 260 rotates around the first direction by a preset angle, for example, after rotating 180°, during the process of the first drill rod 210 moving along the first direction toward the side close to the second drill rod 220, the sliding column 291 can slide to the tail end 282 of the rotating groove 280. That is, when the first drill rod 210 approaches the second drill rod 220 to impact the second drill rod 220, the force generated by the reset of the second elastic member 290 will be applied to the second drill rod 220 together with the first drill rod 210, thereby increasing the force of the drill bit 230 on the hard soil layer or stone, and further reducing the difficulty of drilling.

[0056] In combination with the above embodiments, the specific working process is as follows:

[0057] When in use, the first driving member 110 and the second driving member 120 are started, and the first driving member 110 can drive the first drill rod 210 to rotate around the first direction. The start of the second driving member 120 will cause the lead screw 130 to rotate around the first direction. The rotation of the lead screw 130 will cause the sleeve 140 spirally matched therewith to move along the first direction. The movement of the movable frame 150 will drive the outer cylinder 251 to move. At this time, the electromagnet between the outer cylinder 251 and the inner cylinder 252 is in a energized state, and the inner cylinder 252 is attracted to the outer cylinder 251, and then the outer cylinder 251 drives the inner cylinder 252 to move. The movement of the inner cylinder 252 will drive the first drill rod 210, the second drill rod 220 and the drill bit 230 to move along the first direction.

[0058] When the drill bit 230 does not encounter hard objects such as hard soil layers or stones, the drilling mechanism 200 is in the first state. Since the corrugated end of the first drill rod 210 and the corrugated end of the second drill rod 220 are connected to each other, the first drill rod 210 rotates around the first direction at this time, which will drive the second drill rod 220 to rotate synchronously through the wave surface, and further drive the drill bit 230 to rotate, thereby realizing the drilling of the soil by the drilling mechanism 200, and the drilling operation can be carried out normally.

[0059] When the drill bit 230 encounters a hard soil layer or a hard object such as a stone whose hardness is greater than a preset value, the friction between the drill bit 230 and the hard object will increase, the rotation of the second drill rod 220 and the drill bit 230 will be hindered, and the first elastic member 240 between the drill bit 230 and the second drill rod 220 will be compressed. After the first elastic member 240 is compressed a preset distance, the sensor can feed back the induced signal to the electromagnet to cut off the power of the electromagnet. After the electromagnet is cut off, the magnetic force between the inner cylinder 252 and the outer cylinder 251 disappears, allowing the inner cylinder 252 and the outer cylinder 251 to move relative to each other in the first direction.

[0060] At this time, since the rotation of the second drill rod 220 and the drill bit 230 is blocked, the first drill rod 210 will rotate relative to the second drill rod 220. During the rotation, the first drill rod 210 will rise or fall along the wave surface of the second drill rod 220, thereby realizing the reciprocating movement of the first drill rod 210 relative to the second drill rod 220 in the first direction. During the reciprocating movement of the first drill rod 210 in the soil along the first direction, the first drill rod 210 will scrape the inner wall surface of the soil flat, reducing the friction between the first drill rod 210 and the soil during the movement along the first direction, and when the first drill rod 210 moves along the first direction toward the side close to the second drill rod 220, the first drill rod 210 can apply an impact force to the second drill rod 220, thereby loosening the hard soil layer blocking the drill bit 230, breaking the hard objects such as stones blocking the drill bit 230, reducing the resistance of the drill bit 230, making it easier for the drill bit 230 to drill, and allowing the drilling operation to proceed normally.

[0061] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A construction engineering drilling tool, characterized in that: The invention comprises a frame and a drilling mechanism, wherein the drilling mechanism is installed on the frame, and the drilling mechanism comprises a first drill rod, a second drill rod and a drill bit; the first drill rod, the second drill rod and the drill bit are sequentially arranged and connected to each other in the first direction, the first direction is a vertical direction, and the drill bit is located on the side of the first drill rod close to the ground in the first direction; the first drill rod, the second drill rod and the drill bit can all move along the first direction and can rotate around the first direction; the drilling mechanism has a first state and a second state, when in the first state, the first drill rod rotates around the first direction to drive the second drill rod and the drill bit to rotate synchronously, when in the second state, the first drill rod can rotate around the first direction relative to the second drill rod and the drill bit, and when the drilling mechanism is in the second state, the first drill rod can reciprocate in the first direction relative to the second drill rod and the drill bit; the ends of the first drill rod and the second drill rod close to each other in the first direction are both arranged as wave surfaces, the first drill rod can dock with the second drill rod, and the wave surface of the first drill rod is matched with the wave surface of the second drill rod; a limit axis is arranged at one end of the first drill rod close to the second drill rod in the first direction, and the limit axis is arranged along the first direction and connected to the first drill rod. The rod is fixed; a rotation groove is provided on the limiting shaft, and the rotation groove is located on the side of the limiting shaft close to the second drill rod in the first direction. The rotation groove is a vortex structure, and the rotation groove has a head end and a tail end. The head end extends outward to the tail end around the spiral line in the first direction, and the head end is located on the side of the tail end close to the vortex center of the rotation groove, and the head end and the tail end are arranged in sequence in the second direction and are connected to each other; a second chamber is provided on the second drill rod, and a second elastic member is arranged in the second chamber. The second elastic member is arranged along the first direction, and a sliding column is arranged at one end of the second elastic member close to the rotation groove in the first direction, and the sliding column is slidably installed in the rotation groove; in the initial state, the sliding column is located at the head end of the rotation groove, and the end of the second elastic member close to the second drill rod in the first direction is fixed to the second drill rod; and when the limiting shaft rotates around the first direction, it can cause the second elastic member to rotate around the second direction, and the size of the second elastic member in the first direction becomes smaller and the size in the second direction becomes larger, and when the limiting shaft rotates around the first direction by a preset angle, during the process of the first drill rod moving along the first direction to the side close to the second drill rod, the sliding column can slide to the tail end of the rotation groove.

2. A construction engineering drilling tool according to claim 1, characterized in that: The drill bit can move in a first direction relative to the second drill rod and rotate synchronously with the second drill rod around the first direction; the drill bit is connected to the second drill rod through a first elastic member, the first elastic member is arranged along the first direction, and the first elastic member is compressed only when encountering an object with a hardness greater than a preset value; a sensor is arranged on the drill bit, and a locking member is arranged on the first drill rod, the locking member has a locked state and an unlocked state, when in the locked state, the locking member limits the first drill rod from moving in the first direction relative to the second drill rod, and when in the unlocked state, the locking member allows the first drill rod to move in the first direction relative to the second drill rod; the sensor is electrically connected to the locking member, and when the drill bit moves a preset distance along the first direction to the side close to the second drill rod, the sensor can switch the locking member from the locked state to the unlocked state.

3. A construction engineering drilling tool according to claim 2, characterized in that: A second driving member is arranged on the frame, and a lead screw is fixedly arranged at the output end of the second driving member. The second driving member can drive the lead screw to rotate around a first direction. A sleeve is sleeved on the lead screw, and the sleeve is sleeved on the lead screw and spirally matched with the lead screw, and the sleeve can only move along the first direction on the lead screw; the sleeve and the locking member are connected by a movable frame.

4. A construction engineering drilling tool according to claim 3, characterized in that: The frame is provided with a sliding groove, which is arranged along a first direction, and the movable frame is slidably mounted on the sliding groove.

5. A construction engineering drilling tool according to claim 3, characterized in that: The locking member comprises an inner cylinder, an outer cylinder and an electromagnetic assembly. The outer cylinder is connected to the inner cylinder through the electromagnetic assembly. The electromagnetic assembly is electrically connected to the sensor. The outer cylinder is fixed to the movable frame. The inner cylinder is sleeved in the outer cylinder and can move relative to the outer cylinder in a first direction. The first drill rod is sleeved in the inner cylinder. The first drill rod can move synchronously with the inner cylinder in the first direction and rotate relative to the inner cylinder around the first direction. When the electromagnetic assembly is powered on, the electromagnetic assembly can lock the inner cylinder and the outer cylinder and restrict the inner cylinder from moving relative to the outer cylinder in the first direction. When the electromagnetic assembly is powered off, the electromagnetic assembly can unlock the inner cylinder and the outer cylinder and allow the inner cylinder to move relative to the outer cylinder in the first direction. In the initial state, the electromagnetic assembly is in a powered-on state.

6. A construction engineering drilling tool according to claim 5, characterized in that: The electromagnetic assembly comprises two electromagnets, which are respectively arranged on the outer cylinder and the inner cylinder.

7. A construction engineering drilling tool according to claim 1, characterized in that: A limiting ring is arranged on the limiting shaft, and the limiting ring can move synchronously with the limiting shaft along the first direction, and rotate around the first direction relative to the limiting shaft; the second drill rod includes a second shaft body and a second spiral sheet, and the second shaft body is arranged along the first direction. The two ends of the second spiral sheet along the first direction are respectively called the first end and the second end, and the first end is located on the side of the second end close to the first drill rod in the first direction. The first end is slidably connected to the second shaft body, and the second end is fixedly connected to the second shaft body. The limiting ring can drive the first end to slide in the first direction.

8. A construction engineering drilling tool according to claim 7, characterized in that: The second shaft body is provided with a sliding groove and a retaining groove, both of which are arranged along the first direction, the sliding groove is located on the side of the retaining groove close to the central axis of the second shaft body in the second direction, and the second direction is the radial direction of the second shaft body; a sliding plate is provided on the limiting ring, the sliding plate is slidably installed in the sliding groove, and the size of the sliding plate in the first direction is larger than the size of the retaining groove in the first direction, and a connecting block is provided on the sliding plate, which is fixedly connected to the first end of the second spiral sheet after passing through the retaining groove.

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