A fully hydraulic drill rig and its system with a power head automatic switch

Abstract

The present invention provides a fully hydraulic drill rig with an automatically switched power head and its system, which relates to the technical field of drill rig equipment. It includes a hydraulic drill rig, a core sampling module, and a core sample collection plate. The core sampling module is located on the side of the hydraulic drill rig, and the core sample collection plate is located at the lower end of the core sampling module. The hydraulic drill rig is used to drive the drill pipe to drill holes. The drilled drill pipe is placed on the core sampling module for core sampling, and the core samples taken out from the core sampling module are transported into the core sample collection plate for transportation. When the piston rod of the first hydraulic cylinder contracts, it drives the power head to start rotating around the power head mounting shaft, and the rotation direction is towards the hydraulic cylinder mounting plate. In this way, the opening movement of the power head is realized, avoiding the traditional form of manual labor to complete the opening and closing of the power head, thereby reducing labor costs and improving work efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of drilling rig equipment, and specifically relates to a fully hydraulic drilling rig with an automatically switched power head and its system. Background Art

[0002] Fully hydraulic drilling rigs are widely used drilling equipment in domestic mines and tunnels at present. Compared with traditional vertical shaft drilling rigs, fully hydraulic drilling rigs are convenient for modular relocation, do not require the erection of a drill tower, and are safer in construction. There are two ways to drive the drill pipe, namely the top drive power head and the through-hole power head. For the top drive power head, every time a round of drilling is completed and coring is required, the operator needs to manually open and close the power head to complete the work of fishing for the inner pipe. The power heads of fully hydraulic drilling rigs are generally very heavy, especially when drilling inclined holes. It is very difficult to open and close the power head manually. At the same time, two operators are required to operate and tap obliquely during coring, which is time-consuming and increases the labor intensity. Summary of the Invention

[0003] To solve the deficiencies mentioned in the above background art, the purpose of the present invention is to provide a fully hydraulic drilling rig with an automatically switched power head and its system, which solves the problem of difficult coring when drilling inclined holes in the prior art.

[0004] The purpose of the present invention can be achieved by the following technical solutions:

[0005] A fully hydraulic drilling rig with an automatically switched power head includes a hydraulic drilling rig, a coring module, and a core sample collection plate. The coring module is located on the side of the hydraulic drilling rig, and the core sample collection plate is located at the lower end of the coring module. The hydraulic drilling rig is used to drive the drill pipe for drilling. The drilled drill pipe is placed on the coring module for coring, and the core samples taken from the coring module are transported into the core sample collection plate for transportation.

[0006] A power head assembly mounting plate is provided on the hydraulic drilling rig. A hydraulic cylinder mounting plate is provided on the side of the power head assembly mounting plate away from the coring module. A first hydraulic cylinder is movably mounted on the hydraulic cylinder mounting plate. The base of the first hydraulic cylinder is movably mounted on the mounting shaft of the power head assembly mounting plate. A power head is movably mounted on the power head assembly mounting plate. The power head is movably mounted on the power head assembly mounting plate through a power head mounting shaft. The first hydraulic cylinder is movably connected to the power head through a pin at the apex of the oil cylinder.

[0007] Further, a drill pipe placement groove is provided on the coring module. The coring module is inclined, and the side close to the core sample collection plate is the low point.

[0008] Further, the core sample collection plate is movably mounted on the base. The core sample collection plate is driven by a lead screw motor, and a plurality of linearly arranged core sample collection grooves are provided on the core sample collection plate.

[0009] Further, a clamping module mounting groove is provided on the drill pipe placement groove, and a drill pipe clamping module for fixing the drill pipe is installed in the clamping module mounting groove. A first mounting shaft and a second mounting shaft are provided on the side of the core sampling module. A drill bit dismounting module is movably installed on the first mounting shaft, and a transition guide ring is movably installed on the second mounting shaft. A drill bit dismounting device for dismounting the drill bit is provided on the drill bit dismounting module.

[0010] Further, the drill bit dismounting device includes a first rotating ring, which is movably installed on the drill bit dismounting module. Clamping block mounting grooves are circumferentially distributed on the side of the first rotating ring. Drill bit dismounting clamping blocks are movably installed in the clamping block mounting grooves. Second bosses are provided on the drill bit dismounting clamping blocks. A second rotating ring is provided on the side of the drill bit dismounting clamping block away from the first rotating ring, and the second rotating ring is movably installed on the drill bit dismounting module. Contact inclined grooves are circumferentially distributed on the second rotating ring, and the second bosses are movably installed in the contact inclined grooves.

[0011] Further, vertical sliding grooves are provided on both sides of the clamping module mounting groove. The drill pipe clamping module includes two vertical sliding blocks, which are movably installed in the vertical sliding grooves. Horizontal sliding grooves are provided on the inner sides of the vertical sliding blocks. Clamping block mounting blocks are installed on the inner sides of the vertical sliding blocks. First bosses are provided on both sides of the clamping block mounting blocks, and the first bosses are movably installed in the horizontal sliding grooves. Two drill pipe clamping blocks for fixing the drill pipe are movably installed in the first bosses.

[0012] Further, a contact post is provided below the drill pipe clamping block. A rotating shaft main shaft mounting groove is provided on the core sampling module, and a rotating shaft main shaft is movably installed in the rotating shaft main shaft mounting groove. A vibration cam is installed on the rotating shaft main shaft. A first space cam groove is provided on the vibration cam, and the contact post is movably installed in the first space cam groove.

[0013] Further, a second cam is provided in the first space cam groove, and the end face of the contact post abuts against the second cam.

[0014] Further, a crown gear is provided on the vibration cam. The contact post is rotatably connected to the clamping block mounting block. A first gear is provided on the contact post, and the first gear is not fully meshed with the crown gear. A smooth section is provided on the first space cam groove closest to the crown gear, and the first gear is meshed with the crown gear when the contact post is in the smooth section.

[0015] Further, a cam mounting hole for installation is provided on the vibration cam. The cam mounting hole is movably installed on the rotating shaft main shaft. Spline grooves are circumferentially distributed around the cam mounting hole. Connecting splines are circumferentially distributed on the rotating shaft main shaft, and the connecting splines are movably installed in the spline grooves. The connecting spline is composed of two wear-resistant metal layers sandwiching a rubber layer and is connected by glue. A relief cavity is provided in the rubber layer.

[0016] Advantages of the present invention:

[0017] 1. In the present invention, the piston rod of the first hydraulic cylinder contracts to drive the power head to rotate around the power head mounting shaft, and the rotation direction is towards the hydraulic cylinder mounting plate. In this way, the power head realizes the opening movement of the power head, avoiding the use of traditional manual labor to complete the opening and closing of the power head, thereby reducing labor costs and improving work efficiency;

[0018] 2. In the present invention, linear vibration causes the core sample in the drill pipe to separate from the drill pipe and move forward due to inertia, achieving self-core taking and avoiding excessive labor intensity caused by manual knocking. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings;

[0020] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 is a schematic cross-sectional view of the core-taking module of the present invention;

[0022] Figure 3 is a schematic diagram of the structure of the vibration cam of the present invention;

[0023] Figure 4 is a schematic diagram of the structure of the core-taking module of the present invention;

[0024] Figure 5 is a schematic diagram of the installation of the vibration cam and the drill pipe clamping module of the present invention;

[0025] Figure 6 is a schematic diagram of the structure of the drill pipe clamping module of the present invention;

[0026] Figure 7 is a schematic diagram of the structure of the drill bit disassembly module of the present invention;

[0027] Figure 8 is a schematic diagram of the rotating shaft main shaft of the present invention;

[0028] Figure 9 is a schematic diagram of the spline of the rotating shaft main shaft of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0030] As Figures 1-9 shown, a fully hydraulic drilling rig system with a power head automatic switch includes a hydraulic drilling rig 1, a core sampling module 2, and a core sample collection plate 7. The core sampling module 2 is located on the side of the hydraulic drilling rig 1, and the core sample collection plate 7 is located at the lower end of the core sampling module 2. The hydraulic drilling rig 1 is used to drive the drill pipe to drill holes. The drilled drill pipe is placed on the core sampling module 2 for core sampling, and the core samples taken out from the core sampling module 2 are transported into the core sample collection plate 7 for transportation.

[0031] A power head assembly mounting plate 11 is provided on the hydraulic drilling rig 1. A hydraulic cylinder mounting plate 12 is provided on the side of the power head assembly mounting plate 11 away from the core sampling module 2. A first hydraulic cylinder 13 is movably mounted on the hydraulic cylinder mounting plate 12. The base of the first hydraulic cylinder 13 is movably mounted on the mounting shaft of the power head assembly mounting plate 11. A power head 15 is movably mounted on the power head assembly mounting plate 11. The power head 15 is movably mounted on the power head assembly mounting plate 11 through a power head mounting shaft 14. The first hydraulic cylinder 13 is movably connected to the power head 15 through a pin at the apex of the cylinder. With such a design, when the power head 15 needs to be opened, the first hydraulic cylinder 13 is started, and the piston rod of the first hydraulic cylinder 13 starts to contract, driving the power head 15 to rotate around the power head mounting shaft 14 in the direction close to the hydraulic cylinder mounting plate 12, so as to make the power head 15 realize the opening movement of the power head. When the power head 15 needs to be closed, the first hydraulic cylinder 13 is started, and the piston rod of the first hydraulic cylinder 13 starts to extend, driving the power head 15 to rotate around the power head mounting shaft 14 in the direction away from the hydraulic cylinder mounting plate 12, so as to make the power head 15 realize the closing movement of the power head. The above structure makes the power head complete the opening and closing movements through the reciprocating movement of the first hydraulic cylinder 13. The structure is simple, the work is stable and reliable, and the traditional manual labor form is avoided to complete the opening and closing of the power head, thereby reducing the labor cost and improving the work efficiency.

[0032] In some disclosures, a drill pipe placement groove 23 is provided on the core sampling module 2. The core sampling module 2 is inclined, and the side close to the core sample collection plate 7 is the low point. With such a design, the drill pipe can be placed in the drill pipe placement groove 23, and the drill bit can be removed manually and then the drill pipe can be struck to take the core. In this way, single-person operation can be achieved, and there is no need for one person to hold up the drill pipe and another person to control the inclination angle of the drill pipe to strike to complete the core sampling, reducing the labor intensity.

[0033] In some disclosures, the core sample collecting plate 7 is movably installed on the base. The core sample collecting plate 7 can be installed and driven by a lead screw motor or a cylinder slider. A plurality of core sample collecting grooves 71 in a linear array are provided on the core sample collecting plate 7. With such a design, when taking a core, the core sample collecting groove 71 is aligned with the drill pipe placing groove 23, and the core is taken by knocking on the drill pipe placing groove 23. The core falls into the core sample collecting groove 71. After the current core sample collecting groove 71 is full, the position of the core sample collecting plate 7 is adjusted so that another core sample collecting groove 71 is aligned with the drill pipe placing groove 23 to continue taking the core. Such a design is convenient for personnel to operate. Personnel only need to knock on the drill pipe, and there is no need to manually adjust the core sample collecting device or the position of the drill pipe, reducing the labor intensity.

[0034] In some disclosures, a clamping module mounting groove 25 is provided on the drill pipe placement groove 23, and a drill pipe clamping module 4 for fixing the drill pipe is installed in the clamping module mounting groove 25. A first mounting shaft 21 and a second mounting shaft 22 are provided on the side of the core sampling module 2. A drill bit dismounting module 5 is movably installed on the first mounting shaft 21, and a transition guide ring 6 is movably installed on the second mounting shaft 22. Both the drill bit dismounting module 5 and the transition guide ring 6 are installed through a rotating mounting plate. A drill bit dismounting device is movably installed on the drill bit dismounting module 5, and the drill bit dismounting device can slide along the drill bit dismounting module 5, so that axial displacement can be provided during the rotation and dismounting of the drill bit. It can be installed in the form of a guide rail. The drill bit dismounting device can be a three-jaw chuck. One end of the mounting plate is installed on the first mounting shaft 21 or the second mounting shaft 22, and the drill bit dismounting module 5 or the transition guide ring 6 is fixedly installed at the other end of the mounting plate. The mounting plate can be driven to move by the rotation of the first mounting shaft 21 and the second mounting shaft 22. The first mounting shaft 21 and the second mounting shaft 22 can be driven by a motor. Further, the mounting plate can be movably installed on the first mounting shaft 21 or the second mounting shaft 22 and then driven by a motor through a gear or a pulley provided on the mounting plate. With such a design, after the drill pipe is placed in the drill pipe placement groove 23, the drill bit dismounting device provided on the drill bit dismounting module 5 moves to a position concentric with the drill pipe, and the drill pipe is continuously pushed to make the drill bit engage with the drill bit dismounting device. After the drill bit dismounting device clamps the drill bit, it rotates to complete the dismounting. When the drill bit dismounting is completed, the first mounting shaft 21 rotates to make the drill bit dismounting device move to one side for displacement, and the second mounting shaft 22 rotates to make the transition guide ring 6 concentric with the drill pipe. In this way, the core sample can enter the core sample collection groove 71 through the transition guide ring 6 to prevent the loose core sample from falling due to the gap between the core sample collection groove 71 and the drill pipe placement groove 23. At the same time, when encountering continuous rock layer core samples, when the continuous length of the core sample is greater than that of the core sample collection groove 71, the transition guide ring 6 moves to be misaligned with the drill pipe placement groove 23 to form a shearing force to cut off the rock layer core sample. After cutting, the transition guide ring 6 returns to its original position to continue core sampling. In this way, the problem that the core sample collection groove 71 cannot hold the core sample due to the excessive length of the rock layer core sample can be avoided.

[0035] Further, the drill bit disassembly device includes a first rotating ring 51, which is movably installed on the drill bit disassembly module 5. The side of the first rotating ring 51 is provided with circumferentially distributed chuck mounting grooves 52. A drill bit disassembly chuck 53 is movably installed in the chuck mounting grooves 52. The drill bit disassembly chuck 53 is provided with a second boss 54. A second rotating ring 55 is provided on the side of the drill bit disassembly chuck 53 away from the first rotating ring 51. The second rotating ring 55 is movably installed on the drill bit disassembly module 5. The second rotating ring 55 is provided with circumferentially distributed abutting inclined grooves 56. The second boss 54 is movably installed in the abutting inclined grooves 56. In this way, when the drill bit enters the central hole of the first rotating ring 51, rotating the second rotating ring 55 can drive the drill bit disassembly chuck 53 to move inward by changing the position where the abutting inclined grooves 56 abut against the second boss 54 to complete the fixation of the drill bit. In this way, the disassembly of the drill bit is completed by rotating the first rotating ring 51. When the core sampling is completed, the drill bit disassembly device moves to a position concentric with the drill pipe, rotates and moves forward at the same time to complete the installation of the drill bit; thus realizing the automatic disassembly during drill bit core sampling, saving manual labor on the one hand and ensuring the standardization of drill bit disassembly and installation to prevent excessive torque from damaging the drill bit installation thread.

[0036] In some disclosures, vertical sliding grooves 26 are provided on both sides of the clamping module mounting groove 25. The drill pipe clamping module 4 includes two vertical sliding blocks 41, which are movably installed in the vertical sliding grooves 26. Horizontal sliding grooves 42 are formed on the inner sides of the vertical sliding blocks 41. A chuck mounting block 43 is installed on the inner sides of the vertical sliding blocks 41. First bosses 44 are provided on both sides of the chuck mounting block 43. The first bosses 44 are movably installed in the horizontal sliding grooves 42. Two drill pipe chucks 45 for fixing the drill pipe are movably installed in the first bosses 44. In this way, the drill pipe placed in the drill pipe placement groove 23 is fixed by the two drill pipe chucks 45, and the drill pipe can vibrate better when core sampling by knocking.

[0037] In some disclosures, a abutting post 46 is provided below the drill pipe chuck 45. A rotating shaft spindle mounting groove 24 is formed on the core sampling module 2. A rotating shaft spindle 27 is movably installed in the rotating shaft spindle mounting groove 24. A vibration cam 3 is installed on the rotating shaft spindle 27. A first space cam groove 33 is formed on the vibration cam 3. The abutting post 46 is movably installed in the first space cam groove 33. In this way, the rotation of the rotating shaft spindle 27 can drive the drill pipe clamping module 4 to vibrate along the axial direction. In this way, the core sample in the drill pipe can be separated from the drill pipe by linear vibration and move forward due to inertia. Compared with the vibration obtained by the vibration motor, the vibration obtained by the cam has higher stability, and at the same time, a higher instantaneous acceleration can be obtained, that is, it can stop and move in the reverse direction faster when it reaches the position, so that better core sampling can be achieved.

[0038] In some disclosures, a second cam 34 is provided in the first space cam groove 33, and the end face of the abutting column 46 abuts against the second cam 34. In this way, when the rotating shaft main shaft 27 rotates, when the drill pipe clamping module 4 vibrates in the axial direction, it vibrates in the radial direction at the same time, simulating the vibration generated by the rotational feeling during manual knocking. This can better separate the core sample from the inner wall of the drill pipe to facilitate core sampling;

[0039] In some disclosures, a crown gear 35 is provided on the vibration cam 3. The abutting column 46 is rotatably connected to the clamp mounting block 43. A first gear 47 is provided on the abutting column 46. The first gear 47 is not fully meshed with the crown gear 35. When the first space cam groove 33 is closest to the crown gear 35, there is a smooth section. The axial displacement of the abutting column 46 in the smooth section is zero. When the abutting column 46 is in the smooth section, the first gear 47 meshes with the crown gear 35. In this way, the crown gear 35 drives the abutting column 46 to rotate to prevent the abutting column 46 from abutting against the inner wall of the first space cam groove 33 at a long-term single position, causing wear and affecting the smoothness of movement.

[0040] In some disclosures, a cam mounting hole 31 for installation is provided on the vibration cam 3. The cam mounting hole 31 is movably mounted on the rotating shaft main shaft 27. Spline grooves 32 are circumferentially distributed around the cam mounting hole 31. Connecting splines 28 are circumferentially distributed on the rotating shaft main shaft 27. The connecting splines 28 are movably mounted in the spline grooves 32. The connecting splines 28 are composed of two layers of wear-resistant metal layers 281 sandwiching a rubber layer 282 and are connected by glue. A relief cavity 283 is provided in the rubber layer 282 for relieving when the rubber layer 282 deforms. In this way, when multiple vibration cams 3 are installed on the rotating shaft main shaft 27, when there are errors in the movement of the multiple vibration cams 3, the rubber layer 282 deforms to make the vibration cams 3 rotate relative to the rotating shaft main shaft 27 to absorb the errors and avoid the system pressure being unable to be released, causing the equipment to jam.

[0041] Working principle

[0042] Through the first hydraulic cylinder 13, the piston rod of the first hydraulic cylinder 13 starts to contract, driving the power head 15 to rotate around the power head mounting shaft 14. The rotation direction is towards the hydraulic cylinder mounting plate 12. In this way, the power head 15 realizes the opening movement of the power head. At the same time, the rotation of the rotating shaft main shaft 27 drives the drill pipe clamping module 4 to vibrate along the axis direction. In this way, the core sample in the drill pipe can be separated from the drill pipe through linear vibration, and due to inertia, the core sample moves forward to complete core sampling.

[0043] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification is only to illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements fall within the scope of the present invention claimed.

Claims

1. A fully hydraulic drill rig with a power head automatic switch, comprising a hydraulic drill rig (1), a core sampling module (2) and a core sample collection plate (7). It is characterized in that the core sampling module (2) is located on the side of the hydraulic drill rig (1), and the core sample collection plate (7) is located at the lower end of the core sampling module (2); the hydraulic drill rig (1) is used to drive the drill pipe to drill holes, and the drilled drill pipe is placed on the core sampling module (2) for core sampling, and the core samples taken out from the core sampling module (2) are transported into the core sample collection plate (7) for transportation; a power head assembly mounting plate (11) is provided on the hydraulic drill rig (1), a hydraulic cylinder mounting plate (12) is provided on the side of the power head assembly mounting plate (11) away from the core sampling module (2), a first hydraulic cylinder (13) is movably mounted on the hydraulic cylinder mounting plate (12), the base of the first hydraulic cylinder (13) is movably mounted on the mounting shaft of the power head assembly mounting plate (11), a power head (15) is movably mounted on the power head assembly mounting plate (11), the power head (15) is movably mounted on the power head assembly mounting plate (11) through a power head mounting shaft (14), and the first hydraulic cylinder (13) is movably connected to the power head (15) through a pin at the apex of the oil cylinder; a drill pipe placement groove (23) is provided on the core sampling module (2), a clamping module mounting groove (25) is provided on the drill pipe placement groove (23), a drill pipe clamping module (4) for fixing the drill pipe is mounted in the clamping module mounting groove (25), a first mounting shaft (21) and a second mounting shaft (22) are provided on the side of the core sampling module (2), a drill bit disassembly module (5) is movably mounted on the first mounting shaft (21), a transition guide ring (6) is movably mounted on the second mounting shaft (22), and a drill bit disassembly device for drill bit disassembly is provided on the drill bit disassembly module (5); the drill bit disassembly device comprises a first rotating ring (51), the first rotating ring (51) is movably mounted on the drill bit disassembly module (5), a circumferentially distributed chuck mounting groove (52) is provided on the side of the first rotating ring (51), a drill bit disassembly chuck (53) is movably mounted in the chuck mounting groove (52), a second boss (54) is provided on the drill bit disassembly chuck (53), a second rotating ring (55) is provided on the side of the drill bit disassembly chuck (53) away from the first rotating ring (51), the second rotating ring (55) is movably mounted on the drill bit disassembly module (5), a circumferentially distributed abutting inclined groove (56) is provided on the second rotating ring (55), and the second boss (54) is movably mounted in the abutting inclined groove (56); vertical sliding grooves (26) are provided on both sides of the clamping module mounting groove (25), the drill pipe clamping module (4) comprises two vertical sliding blocks (41), the vertical sliding blocks (41) are movably mounted in the vertical sliding grooves (26), a horizontal sliding groove (42) is provided inside the vertical sliding blocks (41), a chuck mounting block (43) is mounted inside the vertical sliding blocks (41), first bosses (44) are provided on both sides of the chuck mounting block (43), the first bosses (44) are movably mounted in the horizontal sliding grooves (42), and two drill pipe chucks (45) for fixing the drill pipe are movably mounted inside the first bosses (44); A resistance column (46) is provided below the drill rod clamp (45); a rotating shaft main shaft installation groove (24) is provided on the coring module (2); a rotating shaft main shaft (27) is movably installed in the rotating shaft main shaft installation groove (24); a vibration cam (3) is installed on the rotating shaft main shaft (27); a first space cam groove (33) is provided on the vibration cam (3); and the resistance column (46) is movably installed in the first space cam groove (33); A second cam (34) is provided in the first spatial cam groove (33), and the end surface of the abutting column (46) abuts against the second cam (34).

2. A fully hydraulic drilling rig with automatic power head switch according to claim 1, It is characterized in that The coring module (2) is arranged tilted, with the side close to the core sample collecting plate (7) being the low point.

3. A fully hydraulic drilling rig with automatic power head switch according to claim 2, It is characterized in that The core sample collection plate (7) is movably mounted on the base, the core sample collection plate (7) is driven by a screw motor, and a plurality of linear array core sample collection slots (71) are provided on the core sample collection plate (7).

4. A fully hydraulic drilling rig with automatic power head switch according to claim 3, It is characterized in that The vibration cam (3) is provided with a crown gear (35), the abutment column (46) is mounted on the clamping block mounting block (43) in a rotationally connected manner, the abutment column (46) is provided with a first gear (47), the first gear (47) is not completely meshed with the crown gear (35), and a smooth section is provided on the side of the first spatial cam groove (33) closest to the crown gear (35), and when the abutment column (46) is in the smooth section, the first gear (47) is meshed with the crown gear (35).

5. A fully hydraulic drilling rig with automatic power head switch according to claim 4, It is characterized in that The vibration cam (3) is provided with a cam mounting hole (31) for mounting, the cam mounting hole (31) is movably mounted on the rotating shaft main shaft (27), the cam mounting hole (31) is provided with circumferentially distributed spline grooves (32) around it, the rotating shaft main shaft (27) is provided with circumferentially distributed connecting splines (28), the connecting splines (28) are movably mounted in the spline grooves (32), the connecting splines (28) are composed of two wear-resistant metal layers (281) sandwiching a rubber layer (282), connected by glue, and a yield cavity (283) is provided in the rubber layer (282).

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