Power head assembly of core drill

Abstract

The utility model discloses a core drill power head assembly which comprises a driving piece, a gearbox and a power head body, the gearbox is provided with an input shaft, an intermediate shaft, an output shaft and a gear shifting assembly, the input shaft is in transmission connection with the driving piece, and the input shaft is in gear meshing transmission with the intermediate shaft; the intermediate shaft and the output shaft are correspondingly provided with two or more gear sets with different transmission ratios, the gear shifting assembly is used for controlling the gear sets to be switched between meshing gears with different transmission ratios, locking transmission and neutral gear transmission between the intermediate shaft and the output shaft of different gears are achieved, and the output shaft and the power head body are in matched transmission. A drill rod clamping assembly used for clamping a drill rod is arranged in the power head body, the drill rod clamping assembly comprises a slip, and the clamping force of the slip is provided by an elastic component; the power head assembly comprises a cooling circulation assembly. The gearbox controls the rotating speed and torque of the drill rod to adapt to different requirements, the slip takes an elastic part as a clamping force source to save energy, and the cooling circulation assembly cools the power head.

Description

Technical Field

[0001] The utility model belongs to the field of geological drilling equipment, in particular to a core drilling rig power head assembly. Background Art

[0002] In geological drilling operations, the drill rod normally uses a rotary drilling operation mode when operating on the ground, so a powerful power source is needed to drive the drill rod. The power head is the transmission device between the drill rod and the power source. The drilling depth of the drill rod can reach thousands of meters during the entire drilling process. This level of drilling may encounter various rock formations of different textures, and the power head is required to clamp hundreds of interconnected drill rods. The drilling duration is long and the fuel consumption is large. Drilling in different rock formations requires different drill rod drilling speed adjustments. Long-term drilling places high demands on the cooling and stability of the equipment. The existing power head has a single power output mode, poor cooling effect, and some unreasonable component designs lead to unstable operation. Therefore, the existing technology urgently needs a core drilling rig power head assembly with stronger adaptability and more stable operation. Utility Model Content

[0003] The utility model aims to provide a core drilling rig power head assembly to solve the problem that the drilling depth of the drilling rig can reach thousands of meters during the entire drilling process. This level of drilling will encounter rock formations of various textures, and the power head is required to clamp hundreds of interconnected drill rods. The drilling duration is long and the fuel consumption is large. Therefore, the power head system is required to have more functions and better structures to solve these technical problems, and to provide a core drilling rig power head assembly with stronger adaptability and more stable operation.

[0004] To achieve the above purpose, the specific technical solution of the utility model is as follows:

[0005] A core drilling rig power head assembly comprises: a driving member, a gearbox and a power head body, wherein the gearbox comprises an input shaft, an intermediate shaft, an output shaft and a shifting assembly, wherein the input shaft is in transmission connection with the driving member, the input shaft is in gear meshing transmission with the intermediate shaft, the intermediate shaft and the output shaft are correspondingly provided with two or more gear sets with different transmission ratios, the shifting assembly is used to control the gear sets to switch between meshing gears with different transmission ratios, so as to realize locking transmission and neutral transmission between the intermediate shaft and the output shaft at different gears, and the output shaft cooperates with the power head body for transmission; a drill rod clamping assembly for clamping a drill rod is arranged in the power head body, the drill rod clamping assembly comprises slips, and the clamping force of the slips is provided by an elastic component; the power head assembly comprises a cooling circulation assembly; the gearbox is a transmission device between the power head body and the driving member, and forms a power transmission path by adjusting the gear sets with different transmission ratios; the drilling speed and torque of the power head body are controlled to meet the working needs of different environments, thereby improving the working efficiency.

[0006] Furthermore, the input shaft is coaxial with the output shaft and is connected to rotate relative to the input shaft, the input shaft is fixedly provided with a stepped gear, and the stepped gear has a sleeve end that is rotatably sleeved with the output shaft, and a transmission end that is transmission-connected with the driving member;

[0007] The output shaft is sequentially sleeved with a medium-speed output gear and a low-speed output gear in a direction away from the stepped gear, and the tooth diameter of the low-speed output gear is larger than that of the medium-speed output gear;

[0008] A transmission intermediate gear, a medium-speed intermediate gear and a low-speed intermediate gear with successively decreasing tooth diameters are fixedly arranged on the intermediate shaft along the power transmission direction of the gearbox. The transmission intermediate gear is meshed with the sleeve end of the stepped gear, the medium-speed intermediate gear is meshed with the medium-speed output gear, and the low-speed intermediate gear is meshed with the low-speed output gear.

[0009] A synchronization component is sandwiched between the tower gear and the medium-speed output gear, and between the medium-speed output gear and the low-speed output gear, and the synchronization component is used to lock the tower gear or the medium-speed output gear or the low-speed output gear with the output shaft. Through such a design, the input shaft and the output shaft are coaxial, which saves the space required for the gearbox; the driving member drives the tower gear to rotate, and since the tower gear and the output shaft are rotatably sleeved and meshed with the transmission intermediate gear, the intermediate shaft rotates at this time; although the entire intermediate shaft rotates and the medium-speed intermediate gear meshes with the medium-speed output gear, and the low-speed intermediate gear meshes with the low-speed output gear, the medium-speed output gear and the low-speed output gear are rotatably sleeved with the output shaft, so the output shaft does not rotate at this time; when different synchronization components are controlled to lock the tower gear or the medium-speed output gear or the low-speed output gear with the output shaft, the driving member can transmit the rotation to the output shaft.

[0010] Further, the synchronization component includes a spline bone, a synchronization gear ring and a coupling sleeve, the spline bone is fixed to the keyway of the output shaft, the outer edge of the spline bone is evenly distributed with convex keys along the axial direction, the outer edge of the synchronization gear ring is axially provided with synchronization convex keys adapted to the convex keys, and the inner edge of the coupling sleeve is evenly distributed with coupling grooves along the axial direction, and the coupling grooves are used to cooperate with the convex keys and the synchronization convex keys at the same time or cooperate with the convex keys alone;

[0011] The coupling sleeve can slide along the axial direction of the spline bone, and the spline bone includes a high-speed spline bone and a medium-low speed spline bone. The high-speed spline bone is clamped between the tower gear and the medium-speed output gear, and the medium-low speed spline bone is clamped between the medium-speed output gear and the low-speed output gear.

[0012] The coupling sleeve comprises a high-speed gear coupling sleeve and a medium-low-speed gear coupling sleeve, wherein the high-speed gear coupling sleeve is sleeved with the high-speed gear spline bone, and the medium-low-speed gear coupling sleeve is sleeved with the medium-low-speed gear spline bone;

[0013] The synchronous gear ring includes a high-speed synchronous gear ring, a medium-speed synchronous gear ring and a low-speed synchronous gear ring. The high-speed synchronous gear ring is fixed to the side of the tower gear close to the high-speed spline bone, the medium-speed synchronous gear ring is fixed to the side of the medium-speed output gear close to the medium- and low-speed spline bones, and the low-speed synchronous gear ring is fixed to the side of the low-speed output gear close to the medium- and low-speed spline bones. The shift assembly includes a shift lever, a fixed cover plate, a shift shaft, a shift block, a shift fork shaft and a shift fork plate;

[0014] The shift shaft penetrates the fixed sealing plate along a first direction, the fixed sealing plate is fixed to the gearbox housing, one end of the shift shaft is connected to the shift lever, and the other end is fixedly provided with a shift block;

[0015] The shift fork shaft is arranged along the second direction, the shift fork piece is slidably sleeved with the shift fork shaft, the open end of the shift fork piece clamps the coupling sleeve, the mounting end of the shift fork piece forms a driving connection with the shift block in the second direction, the shift lever controls the movement of the shift block through the shift shaft, and the shift block is configured to push the shift fork piece to slide along the second direction on the shift fork shaft. Through such a design, the spline bone is locked with the output shaft, the coupling sleeve is locked with the spline bone, a part of the coupling sleeve is sleeved on the spline bone, and a part of the coupling sleeve is sleeved on the synchronous gear ring, at which time the tower gear or the medium-speed output gear or the low-speed output gear is locked with the output shaft, so as to realize the control of the torque and speed of the output shaft.

[0016] Furthermore, a push block is provided at the end of the shift lever, a flat through hole is provided at the connection position between the push block and the shift shaft, one end of the shift shaft inserted into the flat through hole is a flat rotating end, the push block and the flat rotating end are fixed with a pin along the second direction, the shift lever rotates with the central axis of the pin as the axis, driving the shift shaft to slide relative to the fixed cover plate;

[0017] The shift lever also includes an arc-shaped boss integrally formed with the push block, and a fulcrum block fixed to the gearbox housing, the fulcrum block is provided with a V-shaped positioning groove along the second direction, the opening direction of the V-shaped positioning groove faces the arc-shaped boss, a portion of the arc-shaped boss is pushed into the V-shaped positioning groove, and the V-shaped positioning groove forms a limit for the arc-shaped boss in the first direction and a sliding fit in the second direction. Through such a design, the shift lever controls the shift shaft, the shift shaft drives the shift block, the shift block drives the shift fork plate, and the shift fork plate drives the coupling sleeve. When the staff operates the shift lever, the coupling sleeve is controlled to lock the output gears of different gear positions with the output shaft.

[0018] Furthermore, a push block is provided at the end of the shift lever, a flat through hole is provided at the connection position between the push block and the shift shaft, one end of the shift shaft inserted into the flat through hole is a flat rotating end, the push block and the flat rotating end are fixed with a pin along the second direction, the shift lever rotates with the central axis of the pin as the axis, driving the shift shaft to slide relative to the fixed cover plate;

[0019] The shift lever also includes an arc-shaped boss integrally formed with the push block, and a fulcrum block fixed to the gearbox housing, the fulcrum block is provided with a V-shaped positioning groove along the second direction, the opening direction of the V-shaped positioning groove faces the arc-shaped boss, a part of the arc-shaped boss is pushed into the V-shaped positioning groove, and the V-shaped positioning groove forms a limit for the arc-shaped boss in the first direction and a sliding fit in the second direction. The flat through hole and the flat rotating end are designed so that when the staff pushes the shift lever in the first direction without affecting the sliding of the shift shaft in the second direction, the shift shaft will rotate along its own axis, and the flat through hole and the flat rotating end are fixed with a pin so that when the staff pushes the shift lever in the second direction, the arc-shaped boss of the shift lever is limited by the V-shaped positioning groove, and the connection of the shift lever shift shaft can be displaced in the first direction, thereby pushing or pulling out the shift shaft in the first direction, and the design of the V-shaped positioning groove makes the shift lever smoother when it is moved in the first direction with the V-shaped positioning groove as a fulcrum.

[0020] Further, the shift block is U-shaped, two legs extend from both ends of the U-shaped shift block, the opposite surfaces of the two legs form a high-speed shift boss and a medium-low speed shift boss, the shift fork shaft is penetrated by a limit pin, the limit pin is coaxial with the high-speed shift boss and the medium-low speed shift boss in a first direction, and the limit pin can slide along the first direction;

[0021] The shift fork piece comprises a high-speed shift fork piece and a medium-low-speed shift fork piece, and the high-speed shift fork piece and the medium-low-speed shift fork piece are arranged on both sides in the second direction with the limit pin shaft as the boundary;

[0022] In the first direction, with the fork shaft as the boundary, the high-speed fork plate and the medium-low-speed fork plate are provided with a high-speed fork block and a medium-low-speed fork block on different two sides, and the limit pin can simultaneously limit the movement of the high-speed fork block and the medium-low-speed fork block in the second direction;

[0023] A shifting gap is reserved between the high-speed gear shifting boss and the limit pin shaft, a high-speed gear shifting fork sliding groove is provided on the high-speed gear shifting fork block, and the limit pin shaft and the high-speed gear shifting boss slide in the high-speed gear shifting fork sliding groove along the same axis, so as to facilitate the high-speed gear shifting boss and the high-speed gear shifting fork sliding groove to cooperate separately, or the limit pin shaft and the high-speed gear shifting fork sliding groove to cooperate separately, or the high-speed gear shifting boss and the limit pin shaft and the high-speed gear shifting fork sliding groove to cooperate simultaneously;

[0024] A shifting gap is reserved between the medium and low speed shifting boss and the limit pin shaft, and a medium and low speed shifting fork slot is provided on the medium and low speed shifting fork block. The limit pin shaft and the medium and low speed shifting boss slide in the medium and low speed shifting fork slot along the same axis, so as to facilitate the medium and low speed shifting boss to cooperate with the medium and low speed shifting fork slot alone, or the limit pin shaft to cooperate with the medium and low speed shifting fork slot alone, or the medium and low speed shifting boss and the limit pin shaft to cooperate with the medium and low speed shifting fork slot at the same time. Through such a design, the high speed shifting fork piece is used to control the locking of the tower gear and the output shaft, and the medium and low speed shifting fork piece is used to control the locking of the medium speed output gear or the low speed output gear and the output shaft. When it is necessary to adjust different gears of the gearbox, it is necessary to first push the shifting block in the horizontal direction, and the shifting block pushes the limit pin shaft, so that the limit pin shaft can only limit the activity of one shifting fork piece, and then push the shifting block upward or downward, and the shifting boss pushes the shifting fork piece to move up or down.

[0025] Furthermore, a ball screw is fixedly provided at the sleeve connection position between the shift fork plate and the shift fork shaft, the movable end of the ball screw faces the shift fork shaft along the second direction, a grading groove is provided at the joint position between the shift fork shaft and the ball screw, the grading groove is composed of three continuous annular grooves, and the movable end is assembled with the grading groove. With such a design, when the driving force applied to the shift fork plate exceeds the preset force of the ball screw to retract, the ball screw retracts and jumps to the grading groove of the next level or the previous level, preventing the shift fork plate from being too loose and easily displaced by vibration, making the gear position unstable.

[0026] Furthermore, the power head body includes a main shaft and a main shaft gear, the main shaft gear is fixed to the main shaft keyway, the output shaft is provided with a terminal output gear, the terminal output gear is connected to the main shaft gear through a transition gear transmission, and the transition gear is fixed to the transition shaft through a keyway. The design of the transition shaft is because there is a certain distance between the output shaft and the power head body, in order to avoid the power terminal output gear or the main shaft gear having an excessively large tooth diameter and wasting power. The output shaft can also supply energy to the drive pump.

[0027] Furthermore, it also includes a base shell, which provides an installation position for the gearbox, power head body and transition shaft, the gearbox housing of the gearbox is fixedly installed on the base shell, the input shaft, the intermediate shaft and the output shaft are connected to the gearbox housing and / or the base shell bearings, the power head body includes a power head body housing fixedly installed on the base shell, and a main shaft rotatably installed on the base shell, the power head body housing includes a first load-bearing boss, a second load-bearing boss, a disc spring housing, a cylinder shell, a chuck cover and a top cover, the first load-bearing boss and the second load-bearing boss are fixedly connected to the base shell, the first load-bearing boss overlaps the disc spring housing, the cylinder shell, the chuck cover and the top cover in sequence in a direction away from the base shell, and a drill pipe sleeve is provided at the center position of the top cover. With such a design, the main shaft of the power head body needs to rotate, while the power head body shell does not need to rotate, so the main shaft needs to be connected to the base shell through bearings, and the bearings cannot withstand excessive radial force, so the power head body shell and the base shell are fixed to reduce the radial pressure on the bearings on part of the main shaft.

[0028] Furthermore, the power head body is provided with a drill rod clamping assembly, the drill rod clamping assembly includes a slip, a tapered clamping ring and a power piece, the inner wall of the tapered clamping ring has an oblique groove, the slip is penetrated and arranged on the side wall of the main shaft, and the side wall is provided with a slip groove for accommodating the slip to slide radially along the main shaft;

[0029] The slip groove is provided with a limited sliding surface for limiting the slip to slide along the axial direction of the main shaft, and the slip also has an inclined surface that slides with the inclined groove, and the power member provides force for the tapered snap ring to slide along the axial direction of the main shaft. Through such a design, when the tapered snap ring moves up and down, it will drive the slip to move as well. Since the slip is limited in the axial direction of the main shaft, the slip can only slide relative to the inclined groove, and when the tapered snap ring moves up and down, the thickness of the inclined groove and the slip at the matching position will change, thereby promoting the slip to move radially along the main shaft.

[0030] Furthermore, the power member includes a disc spring and a driving cylinder, the disc spring is sleeved on the outer wall of the main shaft, one end of the disc spring abuts against a waterproof retaining ring fixed on the outer wall of the main shaft, and the other end abuts against a tapered retaining ring, the disc spring pushes the tapered retaining ring in the reverse drilling direction, and the tapered retaining ring pushes the slip to slide inside and clamp the drill rod along the radial direction of the main shaft;

[0031] The driving oil cylinder comprises a piston sleeve and a cylinder shell, the piston sleeve is fixedly connected to the tapered clamping ring, the piston sleeve pushes the tapered clamping ring along the drilling direction, and the tapered clamping ring pulls the slips radially along the main shaft to expand and loosen the drill rod;

[0032] The piston sleeve is sleeved on the tapered clamping ring, the cylinder shell is sleeved on the piston sleeve, the fitting surfaces of the cylinder shell and the piston sleeve are provided with a stepped structure, and the stepped structure cooperates to form a hydraulic chamber;

[0033] The piston sleeve and the tapered retaining ring are rotatably connected via a first tapered bearing, wherein the first tapered bearing comprises a first tapered outer ring, a first tapered ball and a first tapered inner ring, wherein the first tapered outer ring is fixed to the piston sleeve, and the first tapered inner ring is fixed to the bearing tray;

[0034] The piston sleeve is connected to the oil cylinder housing through a load-reducing spring, the bearing tray is fixedly connected to the tapered retaining ring, and the first cone bearing is a split bearing;

[0035] A spring pressure seat is fixedly arranged on the top of the piston sleeve, and the spring pressure seat has a plurality of spring mounting bolts arranged along the drilling direction, and the ends of the spring mounting bolts are inserted into the top of the oil cylinder shell, and a plurality of buffer holes for accommodating the spring mounting bolts to slide up and down are opened on the top of the oil cylinder shell, and a load-reducing spring is compressed and installed between the spring mounting bolts and the buffer holes. With such a design, under normal circumstances, the slip clamps the drill rod through the elastic preload force of the disc spring. When the drill rod needs to be replaced, the oil cylinder is driven to inject oil into the hydraulic cavity to push the piston sleeve downward, and the piston sleeve drives the tapered retaining ring to move downward. As the tapered retaining ring moves downward, the slip gradually moves away from the central axis of the main shaft to release the drill rod.

[0036] Furthermore, the tapered clamping ring is provided with a plurality of inclined grooves, the bottom of the inclined groove has a widened slip slideway, a slip slideway plate is slidably arranged in the widened slip slideway, the slip slideway plate is fixed with the inclined surface of the slip, an alloy slip installation groove is arranged on the side of the slip away from the inclined surface, the alloy slip installation groove gradually narrows in the direction away from the slip, the alloy slip is installed and welded, the alloy slip is a trapezoidal block, the clamping surface of the alloy slip is provided with a sharp tooth structure, and the alloy slip installation groove is provided with anti-slip screws at both ends of the alloy slip. With such a design, when the slip clamps the drill pipe, the sharp tooth structure can push into the outer wall of the drill pipe, thereby increasing the clamping force of the slip on the drill pipe. The trapezoidal structure of the alloy slip can prevent it from detaching from the notch of the alloy slip mounting groove when it is inserted into the alloy slip mounting groove, and anti-detachment screws are provided at both ends of the alloy slip mounting groove. When the alloy slip is not firmly welded after long-term use, the alloy slip can be prevented from falling into the inside of the power head body and causing damage to the power head body.

[0037] Furthermore, a cylindrical roller bearing and a second cone bearing are sleeved at the upper end of the main shaft and the base shell, and a third cone bearing and a ball bearing are sleeved at the lower end of the main shaft and the base shell;

[0038] The cylindrical roller bearing and the second cone row bearing rotatably connect the base housing with the main shaft gear. The cylindrical roller bearing includes a cylindrical roller outer ring and a cylindrical roller inner ring. The second cone row bearing includes a second cone row outer ring, a second cone row ball and a second cone row inner ring. The cylindrical roller outer ring is fixedly connected to the base housing, and the cylindrical roller inner ring is fixedly connected to the shaft body. The second cone row outer ring abuts against the cylindrical roller inner ring, and the second cone row inner ring is fixed to the main shaft gear. A gasket is sandwiched between the cylindrical roller inner ring and the second cone row outer ring.

[0039] The third cone row bearing includes a third cone row outer ring, a third cone row ball and a third cone row inner ring, the ball bearing includes a ball outer ring and a ball inner ring, the main shaft is expanded outward near the bottom of the main shaft gear to form a load-bearing protrusion, the third cone row bearing and the ball bearing are sequentially sleeved between the load-bearing protrusion and the second load-bearing boss along the drilling direction, a spring sleeve is sandwiched between the third cone row bearing and the ball bearing, the second load-bearing boss is partially protruded near the ball outer ring to form a supporting block a, the spring sleeve is protruded near the bottom of the ball outer ring to form a supporting block b, a spring assembly groove is arranged on the side of the spring sleeve near the third cone row outer ring, and a plurality of thrust springs are compressed and arranged in the spring assembly groove. Through such a design, the tapered bearing is a split bearing and the third tapered bearing is the load-bearing bearing of the entire main shaft. If the third tapered bearing is worn due to long-term use, a gap will be generated between the third tapered outer ring and the third tapered inner ring, affecting its use. The thrust spring in the spring sleeve can push up the third tapered outer ring, so that the third tapered bearing can rotate smoothly.

[0040] Furthermore, it also includes a circulating spray lubrication assembly, which includes an oil collection tank, a drive pump, a cooling element, a lubrication inlet, and a lubrication outlet arranged in sequence along the circulation direction of the lubricating liquid, and the oil collection tank is connected to the lowest point of the base shell in the height direction. Through such a design, the lubricating oil is sprayed from the lubrication inlet to the gearbox, the power head body, and the bearings and gears rotating in the base shell, which can not only reduce the friction at the rotation of the bearings and gears, but also reduce the temperature of the bearings and gears through the lubricating oil.

[0041] Furthermore, the driving pump is connected to the transition shaft in a transmission manner, and the transition shaft is configured as a power source of the driving pump. An oil storage chamber is provided in the oil collection tank. Through such a design, the transition shaft provides kinetic energy for the driving pump, which can ensure that the circulating spray lubrication assembly works simultaneously with the gearbox and the power head body, and there is no need to supply energy to the driving pump separately, thereby reducing energy consumption. A filter is provided in the oil storage chamber, and an oil outlet is provided at the bottom of the oil collection tank. Through such a design, the filter performs a coarse filter on the lubricating oil flowing from the inside of the base shell to prevent impurities from entering the pipeline of the circulating spray lubrication assembly and causing blockage. The oil outlet is designed at the bottom of the oil collection tank, and the lubricating oil collected and stored in the oil collection tank can be extracted to the greatest extent. A filter is provided between the oil collection tank and the driving pump. The cooling element is a shunt cooling plate, and the shunt cooling plate has a main inlet pipe and a main outlet pipe. The main inlet pipe and the main outlet pipe are connected to a number of branch pipes. The shunt cooling plate is also provided with a cooling fan, and the air outlet position of the cooling fan is matched with the branch pipe. Through such a design, the branch pipe divides a large stream of lubricating oil into several small streams, and the fan is more efficient in cooling the lubricating oil. A flow divider is provided between the cooling element and the lubricating inlet, and the flow divider has an inlet connected to the cooling element pipeline and a flow diversion outlet connected to the lubricating inlet pipeline. The lubricating inlet is provided with a plurality of them on the base housing, the gearbox housing and the power head body housing. Through such a design, the rotating position of the gearbox and the power head body is lubricated and cooled.

[0042] The beneficial effects of the utility model are as follows: the gearbox serves as a transmission device between the power head body and the driving member, and forms a power transmission path by adjusting the gear sets with different transmission ratios; to control the drilling speed and torque of the power head body to meet the working needs in different environments, thereby improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a front view schematic diagram of the overall structure of the utility model;

[0044] Figure 2 It is a schematic diagram of the back side of the overall structure of the utility model;

[0045] Figure 3 It is a top view of the overall structure of the utility model;

[0046] Figure 4 This is a schematic diagram of the connection structure between the gearbox and the power head body of the utility model;

[0047] Figure 5 This is a schematic diagram of the gearbox structure of the utility model (part of the housing is removed);

[0048] Figure 6 This is a schematic diagram of the gearbox structure of the utility model (without the tower gear);

[0049] Figure 7 This is a schematic diagram of the gearbox structure of the utility model (without the housing);

[0050] Figure 8 This is a schematic diagram of the gearbox output shaft and auxiliary structures of the utility model;

[0051] Fig. 9 This is a schematic diagram of the output shaft and auxiliary structure of the gearbox of the utility model (without the coupling sleeve);

[0052] Fig.10 This is a schematic diagram of the structure of the shift assembly of the utility model;

[0053] Fig.11 for Fig.10 A schematic diagram of the enlarged structure of part A;

[0054] Fig.12 This is a schematic diagram of the back structure of the shift assembly of the utility model;

[0055] Fig.13 It is a side structural diagram of the shift assembly of the utility model;

[0056] Fig.14 This is a schematic diagram of the oblique side structure of the shift assembly of the utility model;

[0057] Fig.15 This is a schematic diagram of the power head body structure of the utility model;

[0058] Fig.16 This is a schematic diagram of the structure of the power head body of the utility model (without the disc spring housing and the chuck cover);

[0059] Fig.17 This is a schematic diagram of the structure of the power head body of the utility model (disc spring housing, chuck cover and cylinder housing);

[0060] Fig.18 This is a schematic diagram of the structure of the power head body of the utility model;

[0061] Fig.19 This is a schematic diagram of the structure of the power head body of the utility model (with the main shaft protruding);

[0062] Fig. 20 This is a schematic diagram of the planing structure of the power head body of the utility model;

[0063] Fig.21 for Fig. 20 A schematic diagram of the enlarged structure of part B;

[0064] Fig. 22 for Fig. 20 A schematic diagram of the enlarged structure of part C;

[0065] Fig.23 for Fig. 20 A schematic diagram of the enlarged structure of part D;

[0066] Fig.24 This is a schematic diagram of the slip structure of the utility model;

[0067] Fig.25 It is a schematic diagram of the assembly structure of the taper chuck and slips of the utility model;

[0068] Fig.26 This is a schematic diagram of the structure of the slip clamping surface of the utility model;

[0069] Fig. 27 This is a schematic diagram of the inclined surface structure of the slip of the utility model;

[0070] Fig.28 This is a schematic diagram of the alloy slip structure of the utility model;

[0071] Fig.29 This is a schematic diagram of the cooling gold structure of the utility model;

[0072] Fig.30 This is a schematic diagram of the internal structure of the oil collection tank of the utility model;

[0073] Fig.31 This is a reference diagram for the embodiment 1 of the present utility model;

[0074] Fig.32 This is a schematic diagram of the lubrication outlet structure of the utility model;

[0075] Fig.33 It is a schematic diagram of the structure of the convex key, synchronous convex key and combined groove of the utility model;

[0076] Fig.34 This is a schematic diagram of the structure of the pyramid gear and the input shaft of the utility model;

[0077] Fig.35 This is a schematic diagram of the main shaft and slip groove structure of the utility model;

[0078] Explanation of the marks in the figure: 1. gearbox; 2. power head body; 3. input shaft; 4. intermediate shaft; 5. output shaft; 7. tower gear; 8. sleeve end; 9. transmission end; 10. medium-speed output gear; 11. low-speed output gear; 12. transmission intermediate gear; 13. medium-speed intermediate gear; 14. low-speed intermediate gear; 15. high-speed spline bone; 16. medium- and low-speed spline bone; 17. synchronous gear ring; 18. high-speed gear coupling sleeve; 19. medium- and low-speed gear coupling sleeve; 20. high-speed gear synchronous gear ring; 21. medium-speed gear synchronous gear ring; 22. low-speed gear synchronous gear ring; 23. piston sleeve; 24. shift lever; 25. fixed cover plate; 26. shift shaft; 27. shift block; 28. shift fork shaft; 29. ​​shift fork plate; 30. gearbox housing ;31. Push block;32. Flat through hole;33. Flat rotating end;34. Pin;35. Arc boss;36. Fulcrum block;37. V-shaped positioning groove;38. Leg;39. High-speed gear shift boss;40. Medium-low speed gear shift boss;41. Limit pin;42. High-speed gear fork piece;43. Medium-low speed gear fork piece;44. High-speed gear fork block;45. Medium-low speed gear fork block;46. High-speed gear fork slide;47. Medium-low speed gear fork slide;48. Ball screw;49. Grading groove;50. Active end;51. Spindle;52. Spindle gear;53. Terminal output gear;54. Transition gear;55. Transition shaft;56. Base shell;57. Power head body shell;58. First load-bearing boss;59 , the second load-bearing boss; 60, disc spring housing; 61, cylinder housing; 62, chuck cover; 63, top cover; 64, drill pipe sleeve; 65, slip; 66, taper retaining ring; 67, power piece; 68, inclined groove; 69, inclined surface; 70, disc spring; 71, driving cylinder; 72, waterproof retaining ring; 73, step structure; 74, hydraulic chamber; 75, spring pressure seat; 76, spring mounting bolt; 77, load-reducing spring; 78, bearing tray; 79, first cone row bearing; 80, first cone row outer ring; 81, first cone row inner ring; 82, widening slip slide; 83, slip slide plate; 84, alloy slip installation groove; 85, alloy slip; 86, sharp tooth structure; 87, anti-slip screw; 88, cylindrical roller bearing; 89, second cone row Bearing; 90, third cone row bearing; 91, ball bearing; 92, cylindrical roller outer ring; 93, cylindrical roller inner ring; 94, second cone row outer ring; 95, second cone row inner ring; 96, gasket; 97, third cone row outer ring; 98, third cone row inner ring; 99, load-bearing convex block; 100, spring sleeve; 101, abutment block a; 102, abutment block b; 103, spring assembly groove; 104, thrust spring; 105, lubrication inlet; 106, oil collection tank; 107, drive pump; 108, cooling element; 109, oil chamber; 110, filter screen; 111, oil outlet; 112, filter; 113, split cooling plate; 114, cooling fan; 115, main inlet pipe; 116, main outlet pipe; 117, branch pipe;118, flow divider; 119, inlet; 120, flow divider outlet; 121, speed measuring gear ring; 122, ball outer ring; 123, ball inner ring; 124, convex key; 125, synchronous convex key; 126, combination groove; 127, slip groove; 128, limit sliding surface; 129, first cone row ball; 130, buffer hole; 131, lubrication outlet; 132, second cone row ball; 133, third cone row ball. ;

[0079] x-a first direction, which refers to the axial direction of the shift shaft 26;

[0080] y- the second direction refers to the axial direction of the fork shaft 28 . DETAILED DESCRIPTION

[0081] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0082] Comprehensive reference Figures 1 to 29 .

[0083] Example 1

[0084] A core drilling rig power head assembly, comprising: a driving member, a gearbox 1 and a power head body 2, the gearbox 1 having an input shaft 3, an intermediate shaft 4, an output shaft 5 and a shift assembly, the input shaft 3 is connected to the driving member in a transmission manner, the input shaft 3 and the intermediate shaft 4 are meshed with gears for transmission, the intermediate shaft 4 and the output shaft 5 are provided with two or more gear sets with different transmission ratios, the shift assembly is used to control the gear sets to switch between meshing gears with different transmission ratios, and realize locking transmission and neutral transmission between the intermediate shaft 4 and the output shaft 5 at different gears, and the output shaft 5 cooperates with the power head body 2 for transmission;

[0085] A drill rod clamping assembly for clamping a drill rod is provided in the power head body 2. The drill rod clamping assembly includes a slip 65. The clamping force of the slip 65 is provided by an elastic component.

[0086] The power head assembly includes a cooling circulation component;

[0087] The input shaft 3 is coaxial with the output shaft 5 and is connected to rotate relative to each other. The input shaft is fixedly provided with a stepped gear 7. The stepped gear 7 has a sleeve end 8 that is sleeved with the output shaft 5 for rotation, and a transmission end 9 that is transmission-connected with the driving member.

[0088] The output shaft 5 is rotated in a direction away from the stepped gear 7 and is sleeved with a medium-speed output gear 10 and a low-speed output gear 11. The tooth diameter of the low-speed output gear 11 is larger than that of the medium-speed output gear 10.

[0089] A transmission intermediate gear 12, a medium-speed intermediate gear 13 and a low-speed intermediate gear 14 with successively decreasing tooth diameters are fixedly arranged on the intermediate shaft 4 along the power transmission direction of the gearbox. The transmission intermediate gear 12 is meshed with the sleeve end 8 of the stepped gear 7, the medium-speed intermediate gear 13 is meshed with the medium-speed output gear 10, and the low-speed intermediate gear 14 is meshed with the low-speed output gear 11.

[0090] A synchronization component is sandwiched between the stepped gear 7 and the medium-speed output gear 10 , and between the medium-speed output gear 10 and the low-speed output gear 11 . The synchronization component is used to lock the stepped gear 7 or the medium-speed output gear 10 or the low-speed output gear 11 with the output shaft 5 .

[0091] The synchronization component includes a spline bone, a synchronization gear ring 17 and a coupling sleeve. The spline bone is fixed to the keyway of the output shaft 5. The outer edge of the spline bone is evenly distributed with convex keys 124 along the axial direction. The outer edge of the synchronization gear ring 17 is axially provided with synchronization convex keys 125 adapted to the convex keys. The inner edge of the coupling sleeve is evenly distributed with coupling grooves 126 along the axial direction. The coupling grooves 126 are used to cooperate with the convex keys 124 and the synchronization convex keys 125 at the same time or cooperate with the convex keys 124 alone.

[0092] The coupling sleeve can slide along the axial direction of the spline bone. The spline bone includes a high-speed spline bone 15 and a medium-low speed spline bone 16. The high-speed spline bone 15 is sandwiched between the stepped gear 7 and the medium-speed output gear 10, and the medium-low speed spline bone 16 is sandwiched between the medium-speed output gear 10 and the low-speed output gear 11.

[0093] The coupling sleeve includes a high-speed gear coupling sleeve 18 and a medium-low-speed gear coupling sleeve 19. The high-speed gear coupling sleeve 18 is sleeved with the high-speed gear spline bone 15, and the medium-low-speed gear coupling sleeve 19 is sleeved with the medium-low-speed gear spline bone 16.

[0094] The synchronous gear ring 17 includes a high-speed synchronous gear ring 20, a medium-speed synchronous gear ring 21 and a low-speed synchronous gear ring 22. The high-speed synchronous gear ring 20 is fixed to the side of the stepped gear 7 close to the high-speed spline bone 15, the medium-speed synchronous gear ring 21 is fixed to the side of the medium-speed output gear 10 close to the medium-low speed spline bone 16, and the low-speed synchronous gear ring 22 is fixed to the side of the low-speed output gear 11 close to the medium-low speed spline bone 16. The shift assembly includes a shift lever 24, a fixed cover plate 25, a shift shaft 26, a shift block 27, a shift fork shaft 28 and a shift fork plate 29;

[0095] The shift shaft 26 passes through the fixed sealing plate 25 along the first direction. The fixed sealing plate 25 is fixed to the gearbox housing 30. One end of the shift shaft 26 is connected to the shift lever 24, and the other end is fixedly provided with a shift block 27.

[0096] The fork shaft 28 is arranged along the second direction, the fork piece 29 is slidably sleeved on the fork shaft 28, the open end of the fork piece 29 is clamped by the combination sleeve, the mounting end of the fork piece 29 forms a driving connection with the shift block 27 in the second direction, the shift lever 24 controls the movement of the shift block 27 through the shift shaft 26, and the shift block 27 is configured to push the fork piece 29 to slide on the fork shaft 28 along the second direction.

[0097] A push block 31 is provided at the end of the shift lever 24. A flat through hole 32 is provided at the connection position between the push block 31 and the shift shaft 26. One end of the shift shaft 26 inserted into the flat through hole 32 is a flat rotating end 33. A pin 34 is provided along the second direction to fix the push block 31 and the flat rotating end 33. The shift lever 24 rotates around the central axis of the pin 34, driving the shift shaft 26 to slide relative to the fixed cover plate 25.

[0098] The shift lever 24 also includes an arc-shaped boss 35 integrally formed with the push block 31, and a fulcrum block 36 fixed to the gearbox housing 30. The fulcrum block 36 is provided with a V-shaped positioning groove 37 along the second direction. The opening direction of the V-shaped positioning groove 37 is toward the arc-shaped boss 35. Part of the arc-shaped boss 35 is pushed into the V-shaped positioning groove 37. The V-shaped positioning groove 37 forms a limit for the arc-shaped boss 35 in the first direction and a sliding fit in the second direction.

[0099] The shift block 27 is U-shaped, and two legs 38 extend from both ends of the U-shaped shift block 27. The opposite surfaces of the two legs 38 form a high-speed shift boss 39 and a medium-low speed shift boss 40. The shift fork shaft 28 is penetrated by a limit pin 41. The limit pin 41 is coaxial with the high-speed shift boss 39 and the medium-low speed shift boss 40 in the first direction, and the limit pin 41 can slide along the first direction.

[0100] The shift fork piece 29 includes a high-speed shift fork piece 42 and a medium-low-speed shift fork piece 43, and the high-speed shift fork piece 42 and the medium-low-speed shift fork piece 43 are arranged on both sides in the second direction with the limit pin shaft 41 as the boundary;

[0101] In the first direction, with the fork shaft 28 as the boundary, the high-speed fork piece 42 and the medium-low-speed fork piece 43 are provided with a high-speed fork block 44 and a medium-low-speed fork block 45 on different two sides, and the limit pin 41 can simultaneously limit the movement of the high-speed fork block 44 and the medium-low-speed fork block 45 in the second direction;

[0102] A shifting gap is reserved between the high-speed gear shifting boss 39 and the limiting pin 41, and a high-speed gear shifting fork slide 46 is provided on the high-speed gear shifting fork block 44. The limiting pin 41 and the high-speed gear shifting boss 39 slide in the high-speed gear shifting fork slide 46 along the same axis, so as to facilitate the high-speed gear shifting boss 39 and the high-speed gear shifting fork slide 46 to cooperate with each other alone (high-speed gear), or the limiting pin 41 and the high-speed gear shifting fork slide 46 to cooperate with each other alone (medium-speed gear or low-speed gear), or the high-speed gear shifting boss 39 and the limiting pin 41 and the high-speed gear shifting fork slide 46 to cooperate with each other at the same time (neutral gear);

[0103] A shifting gap is reserved between the medium and low speed gear shifting boss 40 and the limit pin 41, and a medium and low speed gear shift fork slide groove 47 is opened on the medium and low speed gear shift fork block 45. The limit pin 41 and the medium and low speed gear shifting boss 40 slide in the medium and low speed gear shift fork slide groove 47 along the same axis, so as to facilitate the medium and low speed gear shifting boss 40 and the medium and low speed gear shift fork slide groove 47 to cooperate separately (medium speed or low speed), or the limit pin 41 and the medium and low speed gear shift fork slide groove 47 to cooperate separately (high speed), or the medium and low speed gear shifting boss 40 and the limit pin 41 and the medium and low speed gear shift fork slide groove 47 to cooperate at the same time (neutral gear).

[0104] A ball screw 48 is fixed at the socket connection position of the fork piece 29 and the fork shaft 28. The movable end 50 of the ball screw 48 is directed toward the fork shaft 28 along the second direction. A grading groove 49 is provided at the joint between the fork shaft 28 and the ball screw 48. The grading groove 49 is composed of three continuous annular grooves, and the movable end 50 is assembled with the grading groove 49.

[0105] by Fig.31 The up, down, left, and right directions are reference directions in this embodiment. The gearbox 1 is adjusted to the high gear as follows: the shift lever 24 is shifted to the right, and the arc-shaped boss 35 on the top of the shift lever 24 pulls the shift shaft 26 to the right with the V-shaped positioning groove 37 as a fulcrum. The shift shaft 26 drives the shift fork shaft 27 to the right, and the high-speed shift boss 39 of the shift fork shaft 27 pushes the limit pin 41 to the right, so that the limit pin 41 is pushed out of the high-speed shift fork slide groove 46, and the limit pin 41 no longer hinders the high-speed shift fork piece 42 from sliding along the axial direction of the shift fork shaft. At this time, the shift lever 24 is pressed down to shift gears. The rod 24 drives the shift shaft 26 to rotate in its axial direction, the leg 38 of the shift fork shaft 27 tilts upward, and the high-speed shift boss 39 pushes the high-speed shift fork plate 42. The ball screw 48 in the high-speed shift fork plate 42 is subjected to a force exceeding a preset force, and the head of the ball screw 48 shrinks and jumps inward to the upper-level grading groove 49. At this time, the high-speed shift fork plate 42 pushes the high-speed gear coupling sleeve 18, so that the high-speed gear coupling sleeve 18 is arranged between the high-speed gear synchronous ring gear 20 and the high-speed gear spline bone 15. At this time, the tower gear 7 is locked with the output shaft 5, and the gearbox 1 is adjusted to the high-speed gear.

[0106] by Fig.31The reference directions of up, down, left and right in this embodiment are used. The transmission case 1 is adjusted to the medium speed gear in the following manner: the shift lever 24 is shifted to the left, and the arc-shaped boss 35 on the top of the shift lever 24 pushes the shift shaft 26 to the left with the V-shaped positioning groove 37 as a fulcrum. The shift shaft 26 drives the shift fork shaft 27 to the left, and the medium and low speed shift boss 40 of the shift fork shaft 27 pushes the limit pin 41 to the left, so that the limit pin 41 is pushed out of the medium and low speed shift fork slide groove 47, and the limit pin 41 no longer hinders the medium and low speed shift fork piece 43 from sliding along the axial direction of the shift fork shaft. At this time, the shift lever 24 is pressed down, and the shift lever 24 drives the shift fork shaft 27 to the left. The shift shaft 26 rotates in its axial direction, the legs 38 of the shift fork shaft 27 are lifted up, and the medium and low speed shift boss 40 pushes the medium and low speed shift fork plate 43 upward, and the ball screw 48 in the medium and low speed shift fork plate 43 is subjected to a force exceeding the preset force, and the head of the ball screw 48 shrinks and jumps inward to the upper level grading groove 49. At this time, the medium and low speed shift fork plate 29 pushes the medium and low speed gear combining sleeve 19, so that the medium and low speed gear combining sleeve 19 is sleeved between the medium speed gear synchronization ring gear 21 and the medium and low speed gear spline bone 16. At this time, the medium speed output gear 10 is locked with the output shaft 5, and the gearbox 1 is adjusted to the medium speed gear.

[0107] by Fig.31 The reference directions of up, down, left and right in this embodiment are used. The transmission 1 is adjusted to the low gear by: the shift lever 24 is shifted to the left, and the arc-shaped boss 35 on the top of the shift lever 24 pushes the shift shaft 26 to the left with the V-shaped positioning groove 37 as a fulcrum. The shift shaft 26 drives the shift fork shaft 27 to the left, and the low and medium speed shift boss 40 of the shift fork shaft 27 pushes the limit pin 41 to the left, so that the limit pin 41 is pushed out of the low and medium speed shift fork slide groove 47, and the limit pin 41 no longer hinders the low and medium speed shift fork piece 43 from sliding along the axial direction of the shift fork shaft. At this time, the shift lever 24 is lifted up, and the shift lever 24 is lifted up. The shift shaft 26 is driven to rotate in its axial direction, the leg 38 of the shift fork shaft 27 is pressed down, and the medium and low speed shift boss 40 pushes the medium and low speed shift fork plate 43, and the ball screw 48 in the medium and low speed shift fork plate 43 is subjected to a force exceeding the preset force, and the head of the ball screw 48 shrinks and jumps inward to the next level grading groove 49. At this time, the medium and low speed shift fork plate 43 pushes the medium and low speed gear coupling sleeve 19, so that the medium and low speed gear coupling sleeve 19 is arranged between the low speed gear synchronization ring gear 22 and the medium and low speed gear spline bone 16. At this time, the low speed output gear 11 is locked with the output shaft 5, and the gearbox 1 is adjusted to the low speed gear.

[0108] Example 2

[0109] The power head body 2 includes a main shaft 51 and a main shaft gear 52, the main shaft gear 52 is fixed to the main shaft 51 by a keyway, the output shaft 5 is provided with a terminal output gear 53, the terminal output gear 53 is connected to the main shaft gear 52 by a transition gear 54, and the transition gear 54 is fixed to the transition shaft 55 by a keyway.

[0110] It also includes a base shell 56, which provides an installation position for the gearbox 1, the power head body 2 and the transition shaft 55. The gearbox housing 30 of the gearbox 1 is fixedly installed on the base shell 56, and the input shaft 3, the intermediate shaft 4 and the output shaft 5 are bearing-connected with the gearbox housing 30 and / or the base shell 56. The power head body 2 includes a power head body housing 57 fixedly installed on the base shell 56, and a main shaft 51 rotatably installed on the base shell 56. The power head body housing 57 includes a first load-bearing boss 58, a second load-bearing boss 59, a disc spring housing 60, a cylinder shell 61, a chuck cover 62 and a top cover 63. The first load-bearing boss 58 and the second load-bearing boss 59 are fixedly connected to the base shell 56. The first load-bearing boss 58 overlaps the disc spring housing 60, the cylinder shell 61, the chuck cover 62 and the top cover 63 in sequence in a direction away from the base shell 56, and a drill pipe sleeve 64 is arranged at the center of the top cover 63. The power head body 2 is provided with a drill rod clamping assembly, which includes a slip 65, a tapered clamping ring 66 and a power member 67. The inner wall of the tapered clamping ring 66 has an inclined groove 68. The slip 65 is arranged through the side wall of the main shaft 51. The side wall is provided with a slip groove 127 for accommodating the slip 65 to slide radially along the main shaft 51.

[0111] The slip groove 127 is provided with a limiting sliding surface 128 for limiting the axial sliding of the slip 65 along the main shaft. The slip 65 also has an inclined surface 69 that slides with the inclined groove 68. The power piece 67 provides force for the axial sliding of the tapered retaining ring 66 along the main shaft 51.

[0112] The power member 67 includes a disc spring 70 and a driving cylinder 71. The disc spring 70 is sleeved on the outer wall of the main shaft 51. One end of the disc spring 70 abuts against a waterproof retaining ring 72 fixed to the outer wall of the main shaft 51, and the other end abuts against a tapered retaining ring 66. The disc spring 70 pushes the tapered retaining ring 66 in the reverse drilling direction, and the tapered retaining ring 66 pushes the slip 65 in the radial direction of the main shaft 51 to slide and clamp the drill pipe.

[0113] The driving cylinder 71 includes a piston sleeve 23 and a cylinder shell 61. The piston sleeve 23 is fixedly connected to the tapered retaining ring 66. The piston sleeve 23 pushes the tapered retaining ring 66 along the drilling direction. The tapered retaining ring 66 pulls the slips 65 radially along the main shaft 51 to expand and loosen the drill pipe.

[0114] The piston sleeve 23 is sleeved on the tapered clamping ring 66, and the cylinder shell 61 is sleeved on the piston sleeve 23. The fitting surfaces of the cylinder shell 61 and the piston sleeve 23 are provided with a step structure 73, and the step structure 73 cooperates to form a hydraulic chamber 74;

[0115] The piston sleeve 23 and the tapered retaining ring 66 are rotatably connected via a first tapered bearing 79. The first tapered bearing 79 includes a first tapered outer ring 80, a first tapered ball 129 and a first tapered inner ring 81. The first tapered outer ring 80 is fixed to the piston sleeve 23, and the first tapered inner ring 81 is fixed to the bearing tray 78.

[0116] The piston sleeve 23 is connected to the oil cylinder shell through the load-reducing spring 77, the bearing tray 78 is fixedly connected to the tapered retaining ring 66, and the first cone row bearing 79 is a split bearing;

[0117] A spring pressure seat 75 is fixedly arranged on the top of the piston sleeve 23. The spring pressure seat 75 has a plurality of spring mounting bolts 76 arranged along the drilling direction. The ends of the spring mounting bolts 76 are inserted into the top of the oil cylinder shell 61. The top of the oil cylinder shell 61 is provided with a plurality of buffer holes 130 for accommodating the spring mounting bolts 76 to slide up and down. A load-reducing spring 77 is compressed and installed between the spring mounting bolts 76 and the buffer holes 130.

[0118] The tapered retaining ring 66 is provided with multiple inclined grooves 68, and the bottom of the inclined groove 68 has a widened slip slide 82, and a slip slide plate 83 is slidably arranged in the widened slip slide 82. The slip slide plate 83 is fixed with the inclined surface 69 of the slip 65. An alloy slip installation groove 84 is provided on the side of the slip 65 away from the inclined surface 69. The alloy slip installation groove 84 gradually narrows in the direction away from the slip 65. The alloy slip 85 is installed and welded. The alloy slip 85 is a trapezoidal block. The clamping surface of the alloy slip 85 is provided with a sharp tooth structure 86, and the alloy slip installation groove 84 is provided with anti-slip screws 87 at both ends of the alloy slip 85.

[0119] In this embodiment, the traditional hydraulic direct clamping of the drill rod is changed from a spring loosening drill rod to a spring loosening drill rod by pressing down the spring by hydraulic equipment using the elastic force of the spring as the clamping force for clamping the drill rod, thereby saving energy consumption.

[0120] The implementation method of the above embodiment is as follows: the cava 65 clamps the drill rod through the elastic pre-tightening force of the disc spring 70. When the drill rod needs to be replaced, the oil cylinder 71 is driven to inject oil into the hydraulic chamber 74 to push the piston sleeve 23 downward, and the piston sleeve 23 drives the tapered retaining ring 66 to move downward. When the tapered retaining ring 66 moves downward, it will drive the cava 65 to move as well. Since the cava 65 is limited in the axial direction of the main shaft 51, the cava 65 can only slide relative to the inclined groove 68. When the tapered retaining ring 66 moves up and down, the thickness of the matching position of the inclined groove 68 and the cava 65 will change, thereby pushing the cava 65 away from the central axis of the main shaft 51 in the radial direction of the main shaft 51, and the cava 65 releases its clamping of the drill rod.

[0121] When the driving cylinder 71 does not press down the piston sleeve 23, the load-reducing spring 77 pushes up the spring pressure seat 75, and the spring pressure seat 75 drives the piston sleeve 23 upward. The piston sleeve 23 lifts the first tapered outer ring, reducing the pressure between the first tapered outer ring and the first tapered inner ring, protecting the first tapered bearing 79, and extending the service life of the first tapered bearing 79.

[0122] A speed measuring gear ring 121 is sandwiched between the disc spring 70 and the waterproof baffle ring 72 .

[0123] Example 3

[0124] The upper end of the main shaft 51 and the base housing 56 are fitted with a cylindrical roller bearing 88 and a second cone bearing 89, and the lower end of the main shaft 51 and the base housing 56 are fitted with a third cone bearing 90 and a ball bearing 91.

[0125] The cylindrical roller bearing 88 and the second cone row bearing 89 rotatably connect the base housing 56 with the main shaft gear 52. The cylindrical roller bearing 88 includes a cylindrical roller outer ring 92 and a cylindrical roller inner ring 93. The second cone row bearing 89 includes a second cone row outer ring 94, a second cone row ball 132 and a second cone row inner ring 95. The cylindrical roller outer ring 92 is fixedly connected to the base housing 56, and the cylindrical roller inner ring 93 is fixedly connected to the shaft body. The second cone row outer ring 94 abuts against the cylindrical roller inner ring 93, and the second cone row inner ring 95 is fixed to the main shaft gear 52. A backing ring 96 is sandwiched between the cylindrical roller inner ring 93 and the second cone row outer ring 94.

[0126] The third cone row bearing 90 includes a third cone row outer ring 97, a third cone row ball 133 and a third cone row inner ring 98, the ball bearing 91 includes a ball outer ring 122 and a ball inner ring 123, the main shaft 51 is expanded outward near the bottom of the main shaft gear 52 to form a load-bearing protrusion 99, the third cone row bearing 90 and the ball bearing 91 are sequentially sleeved between the load-bearing protrusion 99 and the second load-bearing boss 59 along the drilling direction, a spring sleeve 100 is sandwiched between the third cone row bearing 90 and the ball bearing 91, the second load-bearing boss 59 is partially protruded near the ball outer ring 122 to form a supporting block a101, the spring sleeve 100 is protruded near the bottom of the ball outer ring 122 to form a supporting block b102, and a spring assembly groove 103 is provided on the side of the spring sleeve 100 near the third cone row outer ring 97, and a plurality of thrust springs 104 are compressed and arranged in the spring assembly groove 103.

[0127] The implementation method of the above embodiment is as follows: Under normal circumstances, when the present invention is working vertically or tilted to the ground, the third cone bearing 90 serves as a load-bearing bearing. Even if the roller in the third cone bearing 90 is worn after long-term use, it will be compressed due to the deadweight of the drill pipe main shaft 51. However, when the present invention is working in a horizontal direction, the third cone bearing 90 is worn due to long-term use, and the third cone outer ring 97 and the third cone inner ring 98 will become loose due to the gap. The third cone bearing 90 cannot meet the strength requirements for use. The thrust spring 104 in the spring sleeve 100 can push the third cone outer ring 97 toward the third cone inner ring 98, so that the third cone bearing 90 can rotate smoothly.

[0128] In the prior art, there is no elastic adjustment member between the third cone row bearing and the fixed base, or the number and thickness of the gaskets are adjusted to ensure that the third cone row bearing is always in a normal compression working state. Due to untimely adjustment, vibration and abnormal noise will be generated, and the service life of the third cone row ball will be greatly reduced due to the vibration. Through the technical solution of this embodiment, the real-time dynamic adjustment of the third cone row bearing is realized, and the third cone row ball, the third cone row outer ring and the third cone row inner ring are always kept in a compression state, which improves the service life while also eliminating vibration and abnormal noise.

[0129] The load-bearing path of the main shaft 51 is from the second load-bearing boss 59 , the ball outer ring 123 , the spring sleeve 100 , the second tapered bearing 89 to the support platform.

[0130] Example 4

[0131] It also includes a circulating spray lubrication assembly, which includes an oil collection tank 106, a drive pump 107, a cooling member 108, a lubrication inlet 105 and a lubrication outlet 131 arranged in sequence along the circulation direction of the lubricating liquid. The oil collection tank 106 is connected to the lowest point of the base shell 56 in the height direction.

[0132] The driving pump 107 is in driving connection with the transition shaft 55, and the transition shaft 55 is configured as a power source of the driving pump 107. An oil receiving chamber 109 is provided in the oil collecting tank 106, and a filter screen 110 is provided in the oil receiving chamber 109. An oil outlet 111 is provided at the bottom of the oil collecting tank 106, and a filter 112 is provided between the oil collecting tank 106 and the driving pump 107. The cooling element 108 is a shunt cooling plate 113, and the shunt cooling plate 113 has a total inlet pipe 115 and a total outlet pipe 116. The total inlet pipe 115 and the total outlet pipe 116 are provided. 6, the diversion cooling plate 113 is also provided with a cooling fan 114, the air outlet position of the cooling fan 114 is matched with the branch pipe 117, a diverter 118 is provided between the cooling element 108 and the lubrication inlet 105, the diverter 118 has an inlet 119 connected with the cooling element 108 pipeline, and a plurality of diversion outlets 120 connected with the lubrication inlet 105 by pipeline, and the lubrication inlet 105 is provided with a plurality of on the base shell 56, the gearbox shell 30 and the power head body shell 57.

[0133] The implementation method of the above embodiment is as follows: the lubricating oil is sprayed from the lubrication inlet 105 to the rotating bearings and gears in the power head body 2 and the gearbox 1, which has the effect of lubricating and cooling the bearings and gears. The lubricating oil slowly flows down to the bottom of the base shell 56 with gravity, and then enters the oil collection tank 106 from the base shell 56. When the lubricating oil enters the oil collection tank 106, it is first coarsely filtered by the filter at the tank mouth. As the driving pump 107 works, the lubricating oil is drawn from the oil collection tank 106 to the filter 112 for fine filtration. Further, the lubricating oil enters the diversion cooling plate 113 from the filter 112. The lubricating oil is divided into several small streams of oil by the branch pipe 117 in the diversion cooling plate 113. The cooling fan cools the branch pipe 117 and the lubricating oil. The cooled lubricating oil is sprayed out from the lubrication inlet 105 again to complete a cycle.

[0134] In this embodiment, lubricating liquid is used as a cooling medium, and the internal temperature of the power head is controlled by circulating and spraying the lubricating liquid to reduce the temperature.

[0135] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A core drilling rig power head assembly, characterized in that: include: A drive member, a gearbox (1) and a power head body (2), wherein the gearbox (1) comprises an input shaft (3), an intermediate shaft (4), an output shaft (5) and a shift assembly, wherein the input shaft (3) is in transmission connection with the drive member, the input shaft (3) and the intermediate shaft (4) are gear-engaged for transmission, the intermediate shaft (4) and the output shaft (5) are provided with two or more sets of gears with different transmission ratios respectively, the shift assembly is used to control the gear sets to switch between meshing gears with different transmission ratios, so as to realize locking transmission and neutral transmission between the intermediate shaft (4) and the output shaft (5) at different gears, and the output shaft (5) cooperates with the power head body (2) for transmission; A drill rod clamping assembly for clamping a drill rod is arranged in the power head body (2), the drill rod clamping assembly comprising a slip (65), and the clamping force of the slip (65) is provided by an elastic component; The power head assembly includes a cooling circulation component.

2. The core drilling rig power head assembly according to claim 1, characterized in that: The input shaft (3) and the output shaft (5) are coaxially connected and relatively rotatably connected, the input shaft (3) is fixedly provided with a stepped gear (7), the stepped gear (7) having a sleeve end (8) rotatably sleeved with the output shaft (5), and a transmission end (9) transmission-connected with a driving member; The output shaft (5) is provided with a medium-speed output gear (10) and a low-speed output gear (11) which are rotatably sleeved in a direction away from the stepped gear (7), wherein the tooth diameter of the low-speed output gear (11) is greater than that of the medium-speed output gear (10); A transmission intermediate gear (12), a medium-speed intermediate gear (13) and a low-speed intermediate gear (14) having successively decreasing tooth diameters are fixedly arranged on the intermediate shaft (4) along the power transmission direction of the gearbox; the transmission intermediate gear (12) meshes with the sleeve end (8) of the tower gear (7); the medium-speed intermediate gear (13) meshes with the medium-speed output gear (10); and the low-speed intermediate gear (14) meshes with the low-speed output gear (11); A synchronizing assembly is disposed between the stepped gear (7) and the medium-speed output gear (10), and between the medium-speed output gear (10) and the low-speed output gear (11). The synchronizing assembly is used to lock the stepped gear (7) or the medium-speed output gear (10) or the low-speed output gear (11) with the output shaft (5).

3. The core drilling rig power head assembly according to claim 2, characterized in that: The synchronization component comprises a spline bone, a synchronization ring gear (17) and a coupling sleeve, the spline bone being fixed to the keyway of the output shaft (5), the outer edge of the spline bone being uniformly provided with convex keys (124) along the axial direction, the outer edge of the synchronization ring gear (17) being axially provided with synchronization convex keys (125) adapted to the convex keys, and the inner edge of the coupling sleeve being uniformly provided with coupling grooves (126) along the axial direction, the coupling grooves (126) being used to simultaneously cooperate with the convex keys (124) and the synchronization convex keys (125) or to cooperate with the convex keys (124) alone; The coupling sleeve can slide along the axial direction of the spline bone, and the spline bone comprises a high-speed spline bone (15) and a medium-low-speed spline bone (16). The high-speed spline bone (15) is sandwiched between the tower gear (7) and the medium-speed output gear (10), and the medium-low-speed spline bone (16) is sandwiched between the medium-speed output gear (10) and the low-speed output gear (11); The coupling sleeve comprises a high-speed gear coupling sleeve (18) and a medium-low-speed gear coupling sleeve (19); the high-speed gear coupling sleeve (18) is sleeved in cooperation with the high-speed gear spline bone (15); and the medium-low-speed gear coupling sleeve (19) is sleeved in cooperation with the medium-low-speed gear spline bone (16); The synchronous gear ring (17) comprises a high-speed gear synchronous gear ring (20), a medium-speed gear synchronous gear ring (21) and a low-speed gear synchronous gear ring (22); the high-speed gear synchronous gear ring (20) is fixed to a side of the tower gear (7) close to the high-speed gear spline bone (15); the medium-speed gear synchronous gear ring (21) is fixed to a side of the medium-speed output gear (10) close to the medium- and low-speed gear spline bone (16); and the low-speed gear synchronous gear ring (22) is fixed to a side of the low-speed output gear (11) close to the medium- and low-speed gear spline bone (16).

4. The core drilling rig power head assembly according to claim 3, characterized in that: The shift assembly comprises a shift lever (24), a fixed cover plate (25), a shift shaft (26), a shift block (27), a shift fork shaft (28) and a shift fork plate (29); The shift shaft (26) passes through the fixed sealing plate (25) along a first direction, the fixed sealing plate (25) is fixed to the gearbox housing (30), one end of the shift shaft (26) is connected to the shift lever (24), and the other end is fixedly provided with a shift block (27); The shift fork shaft (28) is arranged along the second direction, the shift fork sheet (29) is slidably sleeved with the shift fork shaft (28), the open end of the shift fork sheet (29) is clamped by the combination sleeve, the mounting end of the shift fork sheet (29) is drivingly connected with the shift block (27) in the second direction, the shift lever (24) controls the movement of the shift block (27) through the shift shaft (26), and the shift block (27) is configured to push the shift fork sheet (29) to slide on the shift fork shaft (28) along the second direction.

5. The core drilling rig power head assembly according to claim 4, characterized in that: The end of the shift lever (24) is provided with a pushing block (31), a flat through hole (32) is provided at a connection position between the pushing block (31) and the shift shaft (26), one end of the shift shaft (26) inserted into the flat through hole (32) is a flat rotating end (33), the pushing block (31) and the flat rotating end (33) are fixed along a second direction by a pin (34), the shift lever (24) rotates around the central axis of the pin (34), and drives the shift shaft (26) to slide relative to the fixed cover plate (25); The shift lever (24) further comprises an arc-shaped boss (35) integrally formed with the push block (31), and a fulcrum block (36) fixed to the gearbox housing (30); the fulcrum block (36) is provided with a V-shaped positioning groove (37) along the second direction; the opening direction of the V-shaped positioning groove (37) faces the arc-shaped boss (35); a portion of the arc-shaped boss (35) is pushed into the V-shaped positioning groove (37); the V-shaped positioning groove (37) forms a limit for the arc-shaped boss (35) in the first direction and forms a sliding fit in the second direction.

6. The core drilling rig power head assembly according to claim 5, characterized in that: The shift block (27) is U-shaped, two legs (38) extend from both ends of the U-shaped shift block (27), and opposite surfaces of the two legs (38) form a high-speed shift boss (39) and a medium-low speed shift boss (40), and a limit pin (41) is passed through the shift fork shaft (28), and the limit pin (41) is coaxial with the high-speed shift boss (39) and the medium-low speed shift boss (40) in a first direction, and the limit pin (41) is slidable along the first direction; The shift fork piece (29) comprises a high-speed shift fork piece (42) and a medium-low-speed shift fork piece (43); the high-speed shift fork piece (42) and the medium-low-speed shift fork piece (43) are arranged on both sides in the second direction with the limit pin shaft (41) as a boundary; In a first direction, with the fork shaft (28) as a boundary, the high-speed fork plate (42) and the medium-low-speed fork plate (43) are provided with a high-speed fork block (44) and a medium-low-speed fork block (45) on two different sides of the high-speed fork plate (42) and the medium-low-speed fork plate (43), and the limit pin shaft (41) can simultaneously limit the movement of the high-speed fork block (44) and the medium-low-speed fork block (45) in a second direction; A shifting gap is reserved between the high-speed gear shifting boss (39) and the limiting pin shaft (41); a high-speed gear shifting fork slide groove (46) is provided on the high-speed gear shifting fork block (44); the limiting pin shaft (41) and the high-speed gear shifting boss (39) slide along the same axis in the high-speed gear shifting fork slide groove (46), so as to facilitate the high-speed gear shifting boss (39) and the high-speed gear shifting fork slide groove (46) to cooperate with each other alone, or the limiting pin shaft (41) and the high-speed gear shifting fork slide groove (46) to cooperate with each other alone, or the high-speed gear shifting boss (39) and the limiting pin shaft (41) and the high-speed gear shifting fork slide groove (46) to cooperate with each other at the same time; A shifting gap is reserved between the medium and low speed gear shifting boss (40) and the limiting pin shaft (41); a medium and low speed gear shifting fork sliding groove (47) is provided on the medium and low speed gear shifting fork block (45); the limiting pin shaft (41) and the medium and low speed gear shifting boss (40) slide in the medium and low speed gear shifting fork sliding groove (47) along the same axis, so that the medium and low speed gear shifting boss (40) and the medium and low speed gear shifting fork sliding groove (47) can be matched separately, or the limiting pin shaft (41) and the medium and low speed gear shifting fork sliding groove (47) can be matched separately, or the medium and low speed gear shifting boss (40) and the limiting pin shaft (41) can be matched with the medium and low speed gear shifting fork sliding groove (47) at the same time.

7. The core drilling rig power head assembly according to claim 6, characterized in that: A ball screw (48) is fixedly provided at the sleeve connection position of the shift fork plate (29) and the shift fork shaft (28); a movable end (50) of the ball screw (48) faces the shift fork shaft (28) along a second direction; a grading groove (49) is provided at the joint position between the shift fork shaft (28) and the ball screw (48); the grading groove (49) is composed of three continuous annular grooves; the movable end (50) is assembled with the grading groove (49).

8. The core drilling rig power head assembly according to claim 1, characterized in that: The power head body (2) comprises a main shaft (51) and a main shaft gear (52), the main shaft gear (52) being fixed to the main shaft (51) by a keyway, the output shaft (5) being provided with a terminal output gear (53), the terminal output gear (53) being transmission-connected to the main shaft gear (52) by a transition gear (54), and the transition gear (54) being fixed to the transition shaft (55) by a keyway.

9. The core drilling rig power head assembly according to claim 1, characterized in that: The invention also comprises a base shell (56), wherein the base shell (56) provides a mounting position for the gearbox (1), the power head body (2) and the transition shaft (55); the gearbox housing (30) of the gearbox (1) is fixedly mounted on the base shell (56); the input shaft (3), the intermediate shaft (4) and the output shaft (5) are connected to the gearbox housing (30) and / or the base shell (56) by bearings; the power head body (2) comprises a power head body housing (57) fixedly mounted on the base shell (56) and a main shaft (51) rotatably mounted on the base shell (56); ), the power head body shell (57) includes a first load-bearing boss (58), a second load-bearing boss (59), a disc spring shell (60), a cylinder shell (61), a chuck cover (62) and a top cover (63), the first load-bearing boss (58) and the second load-bearing boss (59) are fixedly connected to the base shell (56), the first load-bearing boss (58) overlaps the disc spring shell (60), the cylinder shell (61), the chuck cover (62) and the top cover (63) in sequence in a direction away from the base shell (56), and a drill pipe sleeve (64) is provided at the center of the top cover (63).

10. The core drilling rig power head assembly according to claim 1, characterized in that: The power head body (2) is provided with a drill rod clamping assembly, the drill rod clamping assembly comprising a slip (65), a tapered clamping ring (66) and a power member (67), the inner wall of the tapered clamping ring (66) having an inclined groove (68), the slip (65) penetrating the side wall of the main shaft (51), the side wall being provided with a slip groove (127) for accommodating the slip (65) to slide radially along the main shaft (51); The slip groove (127) is provided with a limiting sliding surface (128) for limiting the slip (65) from sliding axially along the main shaft. The slip (65) also has an inclined surface (69) that is slidably matched with the inclined groove (68). The power member (67) provides force for the tapered retaining ring (66) to slide axially along the main shaft (51).

11. The core drilling rig power head assembly according to claim 10, characterized in that: The power member (67) comprises a disc spring (70) and a driving cylinder (71); the disc spring (70) is sleeved on the outer wall of the main shaft (51); one end of the disc spring (70) abuts against a waterproof retaining ring (72) fixed to the outer wall of the main shaft (51); the other end abuts against a tapered retaining ring (66); the disc spring (70) pushes the tapered retaining ring (66) in the reverse drilling direction; the tapered retaining ring (66) pushes the slip (65) radially along the main shaft (51) to slide inside and clamp the drill pipe; The driving oil cylinder (71) comprises a piston sleeve (23) and a cylinder shell (61); the piston sleeve (23) is fixedly connected to the tapered retaining ring (66); the piston sleeve (23) pushes the tapered retaining ring (66) along the drilling direction; the tapered retaining ring (66) pulls the slip (65) radially along the main shaft (51) to expand outward and loosen the drill rod; The piston sleeve (23) is sleeved on the tapered retaining ring (66), the cylinder shell (61) is sleeved on the piston sleeve (23), a step structure (73) is provided on the mating surfaces of the cylinder shell (61) and the piston sleeve (23), and the step structure (73) cooperates to form a hydraulic chamber (74); The piston sleeve (23) and the tapered retaining ring (66) are rotatably connected via a first tapered bearing (79), wherein the first tapered bearing (79) comprises a first tapered outer ring (80), a first tapered ball (129) and a first tapered inner ring (81), wherein the first tapered outer ring (80) is fixed to the piston sleeve (23), and the first tapered inner ring (81) is fixed to the bearing tray (78); The piston sleeve (23) is connected to the oil cylinder housing via a load-reducing spring (77), the bearing tray (78) is fixedly connected to the tapered retaining ring (66), and the first tapered bearing (79) is a split bearing; A spring pressure seat (75) is fixedly provided on the top of the piston sleeve (23), and the spring pressure seat (75) has a plurality of spring mounting bolts (76) arranged along the drilling direction, and the ends of the spring mounting bolts (76) are inserted into the top of the oil cylinder shell (61). The top of the oil cylinder shell (61) is provided with a plurality of buffer holes (130) for accommodating the spring mounting bolts (76) to slide up and down, and a load-reducing spring (77) is compressed and installed between the spring mounting bolts (76) and the buffer holes (130).

12. The core drilling rig power head assembly according to claim 11, characterized in that: The tapered retaining ring (66) is provided with a plurality of inclined grooves (68), the groove bottom of the inclined groove (68) has a widened slip slide (82), a slip slide plate (83) is slidably arranged in the widened slip slide (82), the slip slide plate (83) is fixedly matched with the inclined surface (69) of the slip (65), an alloy slip installation groove (84) is arranged on the side of the slip (65) away from the inclined surface (69), the alloy slip installation groove (84) gradually narrows in a direction away from the slip (65), the alloy slip (85) is installed and welded, the alloy slip (85) is a trapezoidal block, the clamping surface of the alloy slip (85) is provided with a sharp tooth structure (86), and the alloy slip installation groove (84) is provided with anti-slip screws (87) at both ends of the alloy slip (85).

13. The core drilling rig power head assembly according to claim 9, characterized in that: A cylindrical roller bearing (88) and a second tapered bearing (89) are sleeved at the upper end of the main shaft (51) and the base housing (56), and a third tapered bearing (90) and a ball bearing (91) are sleeved at the lower end of the main shaft (51) and the base housing (56); The cylindrical roller bearing (88) and the second cone row bearing (89) rotatably connect the base housing (56) and the main shaft gear (52); the cylindrical roller bearing (88) comprises a cylindrical roller outer ring (92) and a cylindrical roller inner ring (93); the second cone row bearing (89) comprises a second cone row outer ring (94), a second cone row ball (132) and a second cone row inner ring (95); the cylindrical roller outer ring (92) is fixedly connected to the base housing (56); the cylindrical roller inner ring (93) is fixedly connected to the shaft body; the second cone row outer ring (94) abuts against the cylindrical roller inner ring (93); the second cone row inner ring (95) is fixed to the main shaft gear (52); and a backing ring (96) is sandwiched between the cylindrical roller inner ring (93) and the second cone row outer ring (94); The third cone row bearing (90) comprises a third cone row outer ring (97), a third cone row ball (133) and a third cone row inner ring (98); the ball bearing (91) comprises a ball outer ring (122) and a ball inner ring (123); a position of the main shaft (51) close to the bottom of the main shaft gear (52) is expanded outward to form a load-bearing protrusion (99); the third cone row bearing (90) and the ball bearing (91) are sequentially sleeved between the load-bearing protrusion (99) and the second load-bearing boss (59) along the drilling direction; the third cone row bearing (90) and the ball bearing (91) are sequentially sleeved between the load-bearing protrusion (99) and the second load-bearing boss (59) along the drilling direction; A spring sleeve (100) is sandwiched between the bearing (90) and the ball bearing (91); a portion of the second load-bearing boss (59) close to the ball outer ring (122) is raised to form a support block a (101); a bottom portion of the spring sleeve (100) close to the ball outer ring (122) is raised to form a support block b (102); a spring assembly groove (103) is provided on one side of the spring sleeve (100) close to the third cone row outer ring (97); and a plurality of thrust springs (104) are compressed and arranged in the spring assembly groove (103).

14. The core drilling rig power head assembly according to claim 1, characterized in that: It also includes a circulating spray lubrication assembly, which includes an oil collection tank (106), a drive pump (107), a cooling element (108), a lubrication inlet (105) and a lubrication outlet (131) arranged in sequence along the circulation direction of the lubricating liquid, and the oil collection tank (106) is connected to the lowest point of the base shell (56) in the height direction.

15. The core drilling rig power head assembly according to claim 14, characterized in that: The driving pump (107) is drivingly connected to the transition shaft (55), the transition shaft (55) is configured as a power source of the driving pump (107), an oil receiving chamber (109) is provided in the oil collecting tank (106), a filter screen (110) is provided in the oil receiving chamber (109), an oil outlet (111) is provided at the bottom of the oil collecting tank (106), a filter (112) is provided between the oil collecting tank (106) and the driving pump (107), the cooling element (108) is a flow-dividing cooling plate (113), the flow-dividing cooling plate (113) has a main inlet pipe (115) and a main outlet pipe (116), the main inlet pipe (115) and the main outlet pipe (116) are connected to each other. A plurality of branch pipes (117) are connected between the pipes (116); the diversion cooling plate (113) is also provided with a cooling fan (114); the air outlet position of the cooling fan (114) matches the branch pipe (117); a diverter (118) is provided between the cooling element (108) and the lubrication inlet (105); the diverter (118) has an inlet (119) connected to the cooling element (108) via a pipeline, and a plurality of diversion outlets (120) connected to the lubrication inlet (105) via a pipeline; and a plurality of lubrication inlets (105) are provided on the base shell (56), the gearbox shell (30) and the power head body shell (57).

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