Hanger and impact pick embedded rock drill containing the same

Abstract

The present invention discloses a hanger and an impact pick rock drill including the same, relating to the technical field of engineering machinery. The hanger includes a mounting plate and a connecting rod opening and closing assembly, wherein at least two groups of connecting rod opening and closing assemblies are evenly arranged around the center of the mounting plate; the connecting rod opening and closing assembly includes an eccentric shaft I and an eccentric shaft II vertically mounted on the mounting plate, and a stop wing for abutting and fixing against the hole wall, which is rotatably connected to the eccentric shaft I and the eccentric shaft II via two swinging rods, wherein the four rotation centers of the two swinging rods form a parallelogram; the closed position of the stop wing is within the coverage range of the mounting plate, and the stop position is outside the coverage range of the mounting plate. The hanger of the present invention can form a self-locking function by utilizing the hole wall. The impact pick rock drill using the hanger can make the fixation of the impact mechanism to the hole wall more stable, thereby making the up and down impact movement of the impact mechanism and the barrel more stable, thereby improving the working stability and working efficiency of the impact pick rock drill.

Description

Technical Field

[0001] The present invention relates to the technical field of engineering machinery, in particular to a hanger and an impact pick rock-embedded drill bit comprising the hanger. Background Art

[0002] With the rapid global economic development in recent years, the scope of infrastructure construction has continued to expand, and the concepts of people-oriented and environmental protection have been continuously strengthened, resulting in a wide range of applications for pile foundations. Currently, the domestic rotary drilling rig market has over 40,000 units, representing a large construction population. Small and medium-sized rotary drilling rigs account for approximately 70%. In recent years, rotary drilling rig construction has primarily focused on hard rock drilling. Due to their light weight and low axial compressive force, small and medium-sized rotary drilling rigs (with output torque below 360 kN.m) cannot quickly penetrate and break the rock, resulting in low drilling efficiency. The construction method involves first drilling a small-diameter hole with a small-diameter core drill, then clearing the hole with a double-bottom bailer. This is then gradually expanded to a hole using a rock-embedded drill of the designed size, and finally clearing the hole with a double-bottom bailer. This staged construction method produces better drilling results, but is nearly twice as efficient as direct drilling, resulting in higher costs.

[0003] In order to solve the problem of rapid drilling of small and medium-sized rotary drilling rigs in hard rock formations, the following two technologies are currently used in domestic rotary drilling: impact rock breaking and shear rock breaking.

[0004] The theoretical basis of impact rock breaking is that rock will break when the pressure acting on it exceeds 30% to 50% of its uniaxial compressive strength. Using drilling tools (such as high-pressure hammers or hydraulic impactors) to repeatedly vibrate and impact the rock, the powerful impact forces the tool's teeth into the rock, creating cracks and ultimately breaking it. The advantages are good guidance and a low risk of misalignment. However, the disadvantages are: ① The drill rig requires constant forward and reverse rotation of the drill pipe to prevent entanglement in the air supply pipe, requiring a high air volume and high cost; ② The crushed rock is large, making the drill bit's center tube easily clogged; and ③ The crushed area is too large, making the tool very susceptible to wear.

[0005] The theoretical basis for shear rock breaking is that, according to the Coulomb-Navi criterion, the ultimate shear strength of rock is only about 10% to 20% of its ultimate compressive strength. Rotary drills (such as rotary drilling rigs) apply pressure to the drill bit while drilling, causing the drill bit tip to cut into the rock. The rotary torque then peels the rock away from the parent material, successfully achieving shear rock breaking. The advantages are smooth drilling and low rotational speed, which reduces the disturbance of the pile hole by the drill rig. The disadvantages are: ① Due to the limited capacity of small and medium-sized rotary drilling rigs, the drill bit and the rock formation slide relative to each other, resulting in the drill bit's inability to quickly break the rock; and ② the tool wears easily, resulting in extremely low efficiency.

[0006] Based on past engineering construction experience, the combined use of impact and shear rock breaking will greatly improve the construction speed and efficiency of small and medium-sized rotary drilling rigs. For example, the utility model patent application number "201020500809.8," entitled "A Percussion Drill and Rotary Drill," includes the percussion drill and at least one impactor driven by a power source, with the impactor's force-applying component located at the bottom of the drill barrel. Another example is the invention patent application number "202210759906.6," entitled "A Percussion Drill and Rotary Drill Incorporating the Same," which includes a connector, a barrel, a top plate cover, a stop mechanism, and an impact mechanism. The lower end of the barrel is provided with a cutting portion, the top plate cover is located at the upper end of the barrel, the stop mechanism abuts against the hole wall and cooperates with the top plate cover to ensure that the top plate cover does not rotate with the barrel. The impact mechanism is located within the top plate cover and cooperates with the barrel to enable the rotating barrel to generate periodic up and down vibration impact forces.

[0007] The disadvantages of the above schemes are that the first scheme requires an additional power source to be provided to the impactor, while the second scheme does not require an additional power source. However, the stopping effect of the stopping mechanism, which is a key component to ensure that the impact mechanism does not rotate with the cylinder, is not ideal, and the fixation of its stopping knife to the hole wall is not firm. Therefore, it is necessary to design a structure that can use the hole wall to form a self-locking structure to make the fixation of the impact mechanism to the hole wall more secure. Summary of the Invention

[0008] The purpose of the present invention is to provide a hanger and an impact pick embedded rock drill including the same, so as to solve the problems existing in the above-mentioned prior art. The self-locking function can be achieved by utilizing the hole wall, so that the fixing of the impact mechanism to the hole wall is more stable.

[0009] To achieve the above object, the present invention provides the following solutions:

[0010] A hanger comprises a mounting plate and a connecting rod opening and closing assembly, wherein at least two groups of the connecting rod opening and closing assemblies are evenly arranged around the center of the mounting plate; the connecting rod opening and closing assembly comprises an eccentric shaft I, an eccentric shaft II, a swing rod and a stop wing for abutting and fixing with a hole wall, the eccentric shaft I and the eccentric shaft II are vertically mounted on the mounting plate, the distances between the eccentric shaft I and the eccentric shaft II and the center of the mounting plate are L1 and L2 respectively, L1>L2>0, and the angle between the line connecting the eccentric shaft I and the eccentric shaft II and the center of the mounting plate is L1 and L2 respectively, L1>L2>0, and the angle between the line connecting the eccentric shaft I and the eccentric shaft II and the center of the mounting plate is L1 and L2 respectively. is α, 0°<α<90°; one end of the two swing rods is rotationally connected to the eccentric shaft I and the eccentric shaft II respectively, and the other end of the two swing rods is rotationally connected to the stop wing, and the four rotation centers at both ends of the two swing rods form a parallelogram; the motion trajectory of the stop wing includes a closed motion trajectory and an expanded motion trajectory, the closed position of the closed motion trajectory is located within the coverage range of the mounting plate or coincides with the edge of the mounting plate, and the stop position of the expanded motion trajectory is located outside the coverage range of the mounting plate.

[0011] Preferably, a limit block is further provided on the mounting plate, and the limit block is located on the unfolding motion track of the swing arm, and is used to limit the swing angle of the swing arm.

[0012] Preferably, the mounting plate includes a suspension top plate and a suspension bottom plate, the eccentric shaft I and the eccentric shaft II are fixedly arranged between the suspension top plate and the suspension bottom plate, one end of the two swing rods are rotationally connected to the eccentric shaft I and the eccentric shaft II through a rotating sleeve, and the other end of the two swing rods are rotationally connected to the stop wing through a rotating sleeve.

[0013] Preferably, an abutment block is provided on the abutment surface of the stop wing.

[0014] Preferably, the abutment block is arranged at one end of the abutment surface close to the eccentric shaft I.

[0015] Preferably, the mounting plate is a circular structure, and the stop wing is an arc-shaped plate, which abuts concentrically with the circular structure when in the closed position.

[0016] The cam is secured to the outer wall of the drill bit and is adapted to engage the drill bit of the drill string, wherein the cam is secured to the outer wall of the drill bit and is adapted to engage the drill bit of the drill string when the cam is engaged.

[0017] Preferably, the impact mechanism includes an impact top plate, an elastic member, an impact middle plate, a counterweight and an impact bottom plate, which are arranged in sequence from top to bottom, the upper end and the lower end of the elastic member are respectively abutted against the impact top plate and the impact middle plate, a guide column is provided on the impact middle plate, and a gap is provided between the top end of the guide column and the impact top plate, the elastic member is deformed along the axial direction of the guide column, and the upper vibrating tooth is fixedly provided on the lower surface of the impact bottom plate; the bottom end of the connecting rod is fixedly connected to the impact bottom plate, the connecting rod passes through the counterweight, the impact middle plate and the impact top plate, and is slidably connected to the counterweight, the impact middle plate and the impact top plate; a plurality of the elastic members and the connecting rods are evenly arranged around the center tube.

[0018] Preferably, a cylinder top plate and a cylinder middle plate are provided on the upper part of the cylinder, the cylinder top plate and the cylinder middle plate are fixedly connected to the central tube, and the upper and lower surfaces of the cylinder middle plate are vertically provided with cylinder ribs for increasing strength; the upper surface of the cylinder top plate is provided with the lower vibrating teeth, and the surfaces of the upper vibrating teeth and the lower vibrating teeth are both provided with hard alloy; the bottom of the cylinder is provided with cutting teeth, and the outer periphery of the cylinder is provided with wear-resistant strips.

[0019] Preferably, the central tube includes four torque transmission plates connected end to end, a plurality of reinforcing plates are fixedly provided inside the four torque transmission plates, and a plurality of clamps are fixedly provided outside the four torque transmission plates; the top of the torque transmission plate is fixedly connected to the drill rod, and the bottom of the torque transmission plate is fixedly connected to the cylinder.

[0020] Compared with the prior art, the present invention has achieved the following technical effects:

[0021] 1. The hanger of the present invention comprises a connecting rod opening and closing assembly evenly arranged around the center of the mounting plate. Driven by the drill rod, the hanger expands by centrifugal force, causing the retaining wings to abut the hole wall. Because the expanded diameter of the hanger is larger than the diameter of the hole wall, when the retaining wings abut the hole wall, the swing arm forms an angle less than 90° with the rotational direction of eccentric shaft I or eccentric shaft II. Driven by the drill rod, the barrel, and the impact mechanism, eccentric shafts I and II, which continue to rotate, exert pressure on the swing arm in the direction of the swing arm itself, i.e., in a direction inclined toward the hole wall. This pressure is then transmitted to the retaining wings, which in turn transmit the pressure to the hole wall, creating pressure from the retaining wings against the hole wall. Ultimately, the retaining wings secure the hanger by friction with the hole wall. The greater the hanger's rotational tendency, the greater the pressure from eccentric shafts I and II on the swing arm, the greater the pressure from the retaining wings on the hole wall, the greater the friction between the two, and the more secure the retaining, thereby achieving self-locking of the hanger.

[0022] 2. By setting the distance L1 between the eccentric shaft I and the center of the mounting plate to be greater than the distance L2 between the eccentric shaft II and the center of the mounting plate, during the deployment of the stop wing, the end of the stop wing close to the eccentric shaft I is closer to the hole wall than the end close to the eccentric shaft II, and will thus abut against the hole wall first. This is the force-bearing point where the stop wing abuts against the hole wall. The eccentric shaft II and the swing rod connected thereto provide an additional auxiliary pressure for the stop wing, and transmit it to the force-bearing point through the stop wing, so that the pressure of the stop wing on the hole wall is relatively more concentrated, thereby increasing the pressure and friction, and making the abutment and fixation of the hanger to the hole wall more secure.

[0023] 3. By designing the four rotation centers at both ends of the two swing rods to be parallelograms, the trajectory of the stop wing during the expansion and closing movement can always remain smooth, without any sudden change of direction singularity, which is more conducive to contact and separation with the hole wall, that is, it is conducive to the self-locking and unlocking of the hanger.

[0024] 4. The impact pick rock-embedded barrel drill of the present invention adopts the above-mentioned hanger, impact mechanism and vibrating teeth. Without providing an additional power source for the impact mechanism, the hanger makes the fixation of the impact mechanism to the hole wall more stable and reliable, thereby making the up and down impact movement of the impact mechanism and the barrel more stable, thereby improving the stability and working efficiency of the impact pick rock-embedded barrel drill. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. 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 any creative work.

[0026] Figure 1 It is a structural schematic diagram of the hanger in the deployed state;

[0027] Figure 2 for Figure 1 Schematic diagram of the internal structure;

[0028] Figure 3 for Figure 2 Schematic diagram of the structure of the middle connecting rod opening and closing assembly;

[0029] Figure 4 for Figure 1 Schematic diagram of the closed state;

[0030] Figure 5 for Figure 4 Schematic diagram of the internal structure;

[0031] Figure 6 This is a schematic diagram of the structure of an impact pick rock-embedded drill bit;

[0032] Figure 7 for Figure 6 Schematic diagram of the cross-section structure;

[0033] Figure 8 for Figure 6 Schematic diagram of the structure of the middle impact component;

[0034] Among them, 1. hanger; 2. mounting plate; 3. connecting rod opening and closing assembly; 4. eccentric shaft I; 5. eccentric shaft II; 6. swing rod; 7. stop wing; 8. limit block; 9. suspension top plate; 10. suspension bottom plate; 11. abutment block; 12. impact pick embedded rock drill; 13. center tube; 14. impact mechanism; 15. cylinder; 16. connecting rod; 17. limit nut; 18. vibrating tooth; 19. upper vibrating tooth; 20. lower vibrating tooth; 21. impact top plate; 22. elastic part; 23. impact middle plate; 24. counterweight block; 25. impact bottom plate; 26. guide column; 27. cylinder top plate; 28. cylinder middle plate; 29. cylinder rib plate; 30. pick; 31. wear-resistant strip; 32. torque transmission plate; 33. reinforcement plate; 34. hoop. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings and specific implementation methods of 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 making creative efforts are within the scope of protection of the present invention.

[0036] Example 1

[0037] Please refer to Figures 1 to 5 This embodiment provides a hanger 1, comprising a mounting plate 2 and a connecting rod opening and closing assembly 3. The connecting rod opening and closing assembly 3 is mounted on the mounting plate 2, and there are at least two groups of the connecting rod opening and closing assembly 3, which are evenly arranged around the center of the mounting plate 2. For example, if there are two groups, they are symmetrically arranged at 180 degrees; if there are three groups, they are evenly arranged at 120 degrees; if there are four groups, they are evenly arranged at 90 degrees, and so on. The connecting rod opening and closing assembly 3 includes an eccentric shaft I 4, an eccentric shaft II 5, a swing arm 6, and a stop wing 7. The eccentric shaft I 4 and the eccentric shaft II 5 are mounted perpendicularly on the mounting plate 2. The distance between the eccentric shaft I 4 and the center of the mounting plate 2 is L1, and the distance between the eccentric shaft II 5 and the center of the mounting plate 2 is L2, where L1>L2>0. The angle between the line connecting the eccentric shaft I 4 and the eccentric shaft II 5 and the center of the mounting plate 2 is α, where 0°<α<90°. One end of the two swinging rods 6 is rotationally connected to the eccentric shaft I 4 and the eccentric shaft II 5 respectively, and the other end of the two swinging rods 6 is rotationally connected to the stop wing 7. The four rotation centers at both ends of the two swinging rods 6 form a parallelogram. The stop wing 7 is used to abut against the hole wall under the drive of the swinging rod 6. The movement trajectory of the stop wing 7 includes a closing movement trajectory and an expanding movement trajectory. The closing position of the closing movement trajectory is located within the coverage range of the mounting plate 2 or coincides with the edge of the mounting plate 2. The stop position of the expanding movement trajectory is located outside the coverage range of the mounting plate 2. Figure 1 and Figure 2 As shown, when the stop wing 7 is outside the coverage of the mounting plate 2, the hanger 1 is in the unfolded state; Figure 4 and Figure 5 As shown, when the stop wing 7 is within the covering periphery of the mounting plate 2 or coincides with its edge (coincides with the edge as shown in the figure), the hanger 1 is in a closed state.

[0038] The working principle of this embodiment is that when the hanger 1 rotates under the influence of an external force, the mounting plate 2 rotates about its own center, driving the connecting rod opening and closing assemblies 3 evenly arranged on the mounting plate 2 to revolve around the center of the mounting plate 2. In other words, the eccentric shafts I 4 and II 5 mounted on the mounting plate 2 revolve around the center of the mounting plate 2. The swing arm 6 and the stop wing 7 rotatably connected to the swing arm 6 swing accordingly under the action of inertia and centrifugal force to complete the expansion or closing action.

[0039] Scene 1: From closed to open

[0040] When the initial state of the hanger 1 is as follows Figure 4 and Figure 5 In the closed state shown, the hanger 1 is driven by external force to press Figure 5When the swing lever 6 rotates counterclockwise in the direction of the view shown, the swing lever 6 swings around the eccentric axis I 4 and the eccentric axis II 5 in the direction away from the mounting plate 2 under the action of the inertia and centrifugal force of itself and the stop wing 7. That is, the swing lever 6 and the stop wing 7 rotate clockwise relative to the mounting plate 2, causing the stop wing 7 to unfold from the closed position along its unfolding motion trajectory until it reaches the stop position abutting against the hole wall, forming a Figure 1 and Figure 2 Shown in the expanded state.

[0041] It should be noted that when this embodiment is used in drilling, the diameter of the drilled hole should be smaller than the diameter of the hanger 1 when the connecting rod on the eccentric shaft I 4 swings to be collinear with the center of the eccentric shaft I 4 and the mounting plate 2. The preferred solution is that the diameter of the drilled hole is smaller than the diameter of the hanger 1 when the connecting rod on the eccentric shaft II 5 swings to be collinear with the center of the eccentric shaft II 5 and the mounting plate 2.

[0042] During the unfolding process, the stop wing 7 abuts against and is fixed to the hole wall, and the swing rod 6 is fixed accordingly. The hanger 1 still has a tendency to rotate counterclockwise under the drive of external force, that is, the eccentric shaft I 4 and the eccentric shaft II 5 still have a tendency to rotate counterclockwise. Since the unfolded diameter of the hanger 1 is larger than the diameter of the hole wall, the stop wing 7 will abut against the hole wall before it is unfolded to the point where the swing rod 6 and the eccentric shaft II 5 or the eccentric shaft I 4 are collinear. The rotation direction of the swing rod 6 and the eccentric shaft I 4 or the eccentric shaft II 5 will form an angle less than 90°. The eccentric shaft I 4 and the eccentric shaft II 5 with a movement tendency will still apply a pressure to the swing rod 6 in its own direction, that is, in the direction inclined toward the hole wall, and transmit it to the stop wing 7, which then transmits it to the hole wall, forming a pressure of the stop wing 7 on the hole wall, and finally the fixation is completed by the friction between the stop wing 7 and the hole wall. The greater the counterclockwise rotation tendency of the hanger 1, the greater the pressure exerted by the eccentric shafts I 4 and II 5 on the swing rod 6, the greater the pressure exerted by the stop wing 7 on the hole wall, the greater the friction between the two, and the more secure the abutment and fixation, thereby achieving self-locking during counterclockwise rotation.

[0043] During the expansion process of the stop wing 7, since the distance L1 between the eccentric shaft I 4 and the center of the mounting plate 2 is greater than the distance L2 between the eccentric shaft II5 and the center of the mounting plate 2, the end of the stop wing 7 close to the eccentric shaft I 4 is closer to the hole wall than the end close to the eccentric shaft II 5, and will then abut against the hole wall first. This is the force-bearing point where the stop wing 7 abuts against the hole wall. The eccentric shaft II 5 and the swing rod 6 connected thereto provide an additional auxiliary pressure for the stop wing 7, and transmit it to the force-bearing point through the stop wing 7, so that the pressure of the stop wing 7 on the hole wall is relatively more concentrated, thereby making the pressure greater, the friction greater, and the abutment and fixation more secure.

[0044] An abutment block 11 is provided at one end of the stop wing 7 close to the eccentric shaft 14 to further improve the stability of the abutment between the stop wing 7 and the hole wall.

[0045] Scene 2: From opening to closing

[0046] When the initial state of the hanger 1 is as follows Figure 1 and Figure 2 In the unfolded state shown, the hanger 1 is driven by an external force to press Figure 2 When the swing lever 6 rotates clockwise in the direction of the view shown, the swing lever 6 swings around the eccentric axis I 4 and the eccentric axis II 5 toward the mounting plate 2 under the action of the inertia and centrifugal force of itself and the stop wing 7, that is, the swing lever 6 and the stop wing 7 rotate counterclockwise relative to the mounting plate 2, so that the stop wing 7 closes from the extended position along its closing motion trajectory until it reaches its closed position, forming Figure 4 and Figure 5 The closed state is shown. When the hanger 1 rotates clockwise, the angle between the rotation direction of the eccentric shaft I 4 and the eccentric shaft II 5 and the swing arm 6 is greater than 90°, exerting a pulling force on the swing arm 6 in the opposite direction. The pressure of the swing arm 6 on the stop wing 7 and the pressure of the stop wing 7 on the hole wall disappear, and the friction between them also disappears. The stop wing 7 no longer experiences any resistance, and the self-locking function is released, allowing it to close smoothly under the action of inertia and centrifugal force.

[0047] The four rotation centers at both ends of the two swing rods 6 are arranged in a parallelogram, which can keep the trajectory of the stop wing 7 smooth during the expansion and closing movement, without producing sudden change of direction singular points, and is more conducive to contact and separation with the hole wall.

[0048] During the process of the hanger 1 contacting the hole wall, unexpected conditions may occur. For example, deformation or partial collapse of the portion of the hole wall contacting a stop wing 7 may cause the stop wing 7 to lose contact with that portion of the hole wall and, under the action of centrifugal force, exceed the maximum expansion state or even reverse and close, causing many problems in subsequent operations. To avoid such situations, a limit block 8 can be provided on the expansion trajectory of the swing arm 6 to limit the swing angle of the swing arm 6.

[0049] The mounting plate 2 includes a suspension top plate 9 and a suspension bottom plate 10, and the eccentric shaft I 4 and the eccentric shaft II 5 are fixedly installed between the suspension top plate 9 and the suspension bottom plate 10. A rotating sleeve is provided at both ends of the swing rod 6, which is rotatably connected to the eccentric shaft I 4, the eccentric shaft II 5 and the stop wing 7 through the rotating sleeve. A mounting ear is provided on the side of the stop wing 7 facing the swing rod 6, and a rotating shaft cooperating with the rotating sleeve is provided on the mounting ear. The rotating shaft and the rotating sleeve are arranged to rotate with each other.

[0050] As a preferred solution of this embodiment, the mounting plate 2 is a circular structure, and the stop wing 7 is an arc-shaped plate. When the hanger 1 is in a closed state, the arc-shaped plate is concentric with the circular structure of the mounting plate 2, and abuts against the circumferential end surface of the mounting plate 2 with a circular structure. Therefore, the mounting plate 2 can be used to locate the closed position of the stop wing 7, so that the stop wing 7 can complete the closing more stably and perfectly, and it can also ensure that the stop wing 7 will not be affected by excessive closing and affect its smooth deployment.

[0051] Example 2

[0052] Please refer to Figures 6 to 8 This embodiment provides an impact pick-socketed rock drill 12 including the aforementioned hanger 1. The hanger 1, impact mechanism 14, and barrel 15 are arranged sequentially along the center pipe 13 from top to bottom. The center pipe 13 is used to connect the drill pipe of the rotary drilling rig and the barrel 15 for drilling. The hanger 1 and impact mechanism 14 are movably sleeved around the outer periphery of the center pipe 13. A clearance hole for the center pipe 13 is provided in the middle of the mounting plate 2 of the hanger 1. The center of the clearance hole is the center of the mounting plate 2. The hanger 1 and impact mechanism 14 are connected by a connecting rod 16. The lower end of the connecting rod 16 is fixedly connected to the bottom end of the impact mechanism 14. The top end of the connecting rod 16 passes through the top end of the impact mechanism 14 and the mounting plate 2 of the hanger 1 and is slidably connected to the two. A limit nut 17 is provided at the top end of the connecting rod 16 to prevent the connecting rod 16 from detaching from the mounting plate 2, thereby causing the impact mechanism 14 to detach from the hanger 1. The impact mechanism 14 and the cylinder 15 are in contact with each other through the vibrating teeth 18 . The vibrating teeth 18 include an upper vibrating tooth 19 and a lower vibrating tooth 20 that cooperate with each other. The upper vibrating tooth 19 is fixedly connected to the impact mechanism 14 , and the lower vibrating tooth 20 is fixedly connected to the cylinder 15 .

[0053] The impact mechanism 14 comprises, from top to bottom, an impact top plate 21, an elastic member 22, an impact middle plate 23, a counterweight 24, and an impact bottom plate 25. The upper and lower ends of the elastic member 22 abut against the impact top plate 21 and the impact middle plate 23, respectively. A guide post 26 is provided on the impact middle plate 23, with a gap between the top end of the guide post 26 and the impact top plate 21. When the elastic member 22 deforms, its deformation direction, guided by the guide post 26, is aligned with the axial direction of the guide post 26. The counterweight 24 is disposed between the impact bottom plate 25 and the impact middle plate 23. The bottom end of the connecting rod 16, which connects the hanger 1 to the impact mechanism 14, is fixedly connected to the impact bottom plate 25. The connecting rod 16 passes through the counterweight 24, the impact middle plate 23, and the impact top plate 21 in sequence, and is slidably connected to the preceding rods. Multiple elastic members 22, guide posts 26, and connecting rods 16 may be provided, evenly spaced around the center tube 13.

[0054] The upper portion of the cylinder 15 is provided with a top plate 27 and a middle plate 28, both of which are fixedly connected to the central tube 13. Vertical ribs 29 are provided on the upper and lower surfaces of the middle plate 28 to increase strength and enhance the cylinder 15's resistance to shock and pressure. The aforementioned lower vibrating teeth 20 are fixedly mounted on the upper surface of the top plate 27, and the surfaces of the upper and lower vibrating teeth 19, 20 are both coated with wear-resistant cemented carbide. A circle of cutting teeth 30 for drilling are provided at the bottom of the cylinder 15, and several wear-resistant strips 31 are provided on the outer circumference of the cylinder 15.

[0055] As the key structure connecting the drill pipe to the barrel 15, the center pipe 13 must withstand not only the pressure of the rotary drill rig but also the torque of the power head. Therefore, the center pipe 13 is constructed from four welded end-to-end torque transmission plates 32. These plates can be made of wear-resistant steel, with several internally welded reinforcement plates 33 and externally reinforced with clamps 34. The top of the torque transmission plates 32 is fixedly connected to the drill pipe, while the bottom is fixedly connected to the top plate 27 and middle plate 28 of the barrel 15.

[0056] The working principle of this embodiment is that the drill rod of the rotary drilling rig drives the central tube 13 and the cylinder 15 to rotate, and the impact mechanism 14 abutting against the cylinder 15 through the vibrating teeth 18 rotates under the drive of the cylinder 15, and further drives the hanger 1 to rotate. The hanger 1 is expanded and abuts against the hole wall and fixed under the action of the centrifugal force of the rotation. The impact mechanism 14 connected to the hanger 1 through the connecting rod 16 also stops rotating under the restriction of the connecting rod 16, but the cylinder 15 still keeps rotating under the drive of the drill rod, so that the upper vibrating teeth 19 fixed with the impact mechanism 14 and the lower vibrating teeth 20 rotating with the cylinder 15 generate relative rotation. A deformable elastic part 22 is provided and deformation space is reserved for it, so the upper vibrating tooth 19 can move upward along the tooth shape under the extrusion of the lower vibrating tooth 20, thereby driving the impact base plate 25, the counterweight block 24 and the impact middle plate 23 to move upward, and then compressing the elastic part 22 upward, storing the elastic potential energy of the elastic part 22 while also storing the gravitational potential energy of the counterweight block 24. When the tooth top of the rotating lower vibrating tooth 20 passes over the tooth top of the fixed upper vibrating tooth 19, the stored elastic potential energy and gravitational potential energy are released, causing the tooth top of the upper vibrating tooth 19 to produce a strong impact on the tooth bottom of the lower vibrating tooth 20, thus completing a movement cycle of up and down impact. During the rotation of the cylinder 15, the impact mechanism 14 and the cylinder 15 repeatedly perform this periodic motion, thereby realizing periodic impact without the need for external force. This strong impact on the cylinder 15 causes the pick 30 below to impact the bottom of the hole, thereby breaking the hard rock. During the rotation of the cylinder 15, the pick 30 shears and breaks the hard rock at the bottom of the hole, thereby realizing the combined use of impact and shear rock breaking.

[0057] In actual operation, the hanger 1 can be selected and installed as described in Example 1, and the rotation direction of the drill pipe can be controlled. During normal downward drilling, the drill pipe is rotated clockwise. Due to the centrifugal force and the limiting effect of the mounting plate 2, the hanger 1 is in a stable closed state and does not operate. When it is necessary to stop downward drilling and impact the hard rock at the bottom of the hole, the drill pipe is controlled to rotate counterclockwise. The hanger 1 is expanded under the action of centrifugal force and abuts against the hole wall, completing the fixation of the hanger 1 and the impact mechanism 14. The cylinder 15 then begins to periodically impact the hard rock at the bottom of the hole.

[0058] The initial closing position of the connecting rod opening and closing mechanism in the hanger 1 and the position of the limit block 8 can also be adjusted according to actual working conditions, so that the drill rod is closed when rotating counterclockwise and opened when rotating clockwise.

[0059] Adaptive changes based on actual needs are all within the scope of protection of the present invention.

[0060] It should be noted that it will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and it is intended that all variations within the meaning and range of equivalents of the claims be encompassed within the present invention. Any reference signs in the claims should not be construed as limiting the claim to which they relate.

Claims

1. A hanger, characterized in that: It includes a mounting plate and a connecting rod opening and closing assembly, at least two groups of the connecting rod opening and closing assemblies are evenly arranged around the center of the mounting plate; the connecting rod opening and closing assembly includes an eccentric shaft I, an eccentric shaft II, a swing rod and a stop wing for abutting and fixing with the hole wall, the eccentric shaft I and the eccentric shaft II are vertically mounted on the mounting plate, the distances between the eccentric shaft I and the eccentric shaft II and the center of the mounting plate are L1 and L2 respectively, L1>L2>0, the angle between the eccentric shaft I and the eccentric shaft II and the center of the mounting plate is α, 0°<α<90°; one end of the two swing rods are rotationally connected to the eccentric shaft I and the eccentric shaft II respectively, and the other end of the two swing rods are rotationally connected to the stop wing, and the four rotation centers at both ends of the two swing rods form a parallelogram; the motion trajectory of the stop wing includes a closed motion trajectory and an expanded motion trajectory, the closed position of the closed motion trajectory is located within the coverage range of the mounting plate or coincides with the edge of the mounting plate, and the stop position of the expanded motion trajectory is located outside the coverage range of the mounting plate.

2. A hanger according to claim 1, characterized in that: A limit block is further provided on the mounting plate. The limit block is located on the unfolding motion track of the swing arm and is used to limit the swing angle of the swing arm.

3. A hanger according to claim 1, characterized in that: The mounting plate includes a suspension top plate and a suspension bottom plate, the eccentric shaft I and the eccentric shaft II are fixedly arranged between the suspension top plate and the suspension bottom plate, one end of the two swing rods are rotationally connected to the eccentric shaft I and the eccentric shaft II through a rotating sleeve, and the other end of the two swing rods are rotationally connected to the stop wing through a rotating sleeve.

4. A hanger according to any one of claims 1 to 3, characterized in that: An abutment block is provided on the abutment surface of the stop wing.

5. A hanger according to claim 4, characterized in that: The abutment block is arranged at one end of the abutment surface close to the eccentric shaft I.

6. A hanger according to claim 5, characterized in that: The mounting plate is a circular structure, and the stopping wing is an arc-shaped plate. When the arc-shaped plate is in a closed position, it abuts concentrically with the circular structure.

7. A percussion pick rock-socketed drill bit comprising the hanger according to any one of claims 1 to 6, characterized in that: The cam is secured to the outer wall of the cylinder and has a locking plate, the locking plate being secured to the cam face and locking to the center of the cylinder when the cam is engaged.

8. The impact pick rock-socketed drill according to claim 7, characterized in that: The impact mechanism includes an impact top plate, an elastic member, an impact middle plate, a counterweight and an impact bottom plate, which are arranged in sequence from top to bottom. The upper and lower ends of the elastic member are respectively abutted against the impact top plate and the impact middle plate. A guide column is provided on the impact middle plate, and a gap is provided between the top end of the guide column and the impact top plate. The elastic member is deformed along the axial direction of the guide column, and the upper vibrating tooth is fixedly provided on the lower surface of the impact bottom plate; the bottom end of the connecting rod is fixedly connected to the impact bottom plate, and the connecting rod passes through the counterweight, the impact middle plate and the impact top plate, and is slidably connected to the counterweight, the impact middle plate and the impact top plate; a plurality of the elastic members and the connecting rods are evenly arranged around the center tube.

9. The impact pick rock-socketed drill according to claim 7, characterized in that: The upper part of the cylinder is provided with a cylinder top plate and a cylinder middle plate, the cylinder top plate and the cylinder middle plate are fixedly connected to the central tube, and the upper surface and lower surface of the cylinder middle plate are vertically provided with cylinder ribs for increasing strength; the upper surface of the cylinder top plate is provided with the lower vibrating teeth, and the surfaces of the upper vibrating teeth and the lower vibrating teeth are both provided with hard alloy; the bottom of the cylinder is provided with cutting teeth, and the outer periphery of the cylinder is provided with wear-resistant strips.

10. The impact pick rock-socketed drill according to claim 7, characterized in that: The central tube includes four torque transmission plates connected end to end, a plurality of reinforcing plates are fixedly provided inside the four torque transmission plates, and a plurality of clamps are fixedly provided outside the four torque transmission plates; the top of the torque transmission plate is fixedly connected to the drill rod, and the bottom of the torque transmission plate is fixedly connected to the cylinder.

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