Power head gearbox of core drill
By designing the power head gearbox of the core drilling rig, the gear combination of the input shaft, intermediate shaft and output shaft can achieve power transmission path control, which solves the problem that traditional power heads cannot adjust the drilling speed and torque, and improves work efficiency and adaptability .
Patent Information
- Application Number
- CN202420876314.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-25
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2034-04-25
AI Technical Summary
The power head of the traditional core drilling rig cannot directly adjust the drilling speed and torque, and needs to replace the drive motor. The process is cumbersome and the effect is not significant, so it cannot adapt to the needs of different rock formations.
A core drilling rig power head gearbox including input shaft, intermediate shaft, output shaft and shifting components is designed. Power transmission is achieved by controlling gear sets with different transmission ratios, controlling drilling speed and torque, and adapting to the working needs of different environments.
It improves the working efficiency of the drilling rig, simplifies the regulation process of drilling speed and torque, and can more flexibly cope with different rock formation conditions.
Smart Images
Figure CN222296878U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of geological exploration equipment, in particular to a gearbox for a core drilling rig power head. Background Art
[0002] In geological drilling operations, the power head is the transmission device between the drill rod and the motor. The drilling depth of the drill rig can reach thousands of meters during the entire drilling process. At such a deep depth, you may encounter a variety of rock formations or minerals with different hardnesses. The torque required by the drill rod is different. Traditional power heads generally adjust the drilling speed and torque by replacing the motor, which is cumbersome and troublesome. It does not have the function of adjusting the output torque over a wide range. Even if the drive motor is replaced, the effect is not significant. In order to ensure that the drill rod can be stabilized at a reasonable speed under different torques, a core drilling rig power head gearbox is required. Utility Model Content
[0003] The utility model aims to provide a core drilling rig power head gearbox to solve the technical problem that the traditional power head generally does not have the function of directly adjusting the drilling speed and torque of the drill rod, and needs to debug or replace the driving motor to indirectly adjust the drilling speed of the drill rod. Such a control method is too cumbersome and troublesome and the effect is not significant.
[0004] To achieve the above purpose, the specific technical solution of the utility model is as follows:
[0005] A core drilling rig power head gearbox includes: an input shaft, an intermediate shaft, an output shaft and a shift assembly, wherein the input shaft is connected to the driving member, the input shaft and the intermediate shaft are meshed and driven, the intermediate shaft and the output shaft are provided with two or more gear sets with different transmission ratios, the shift assembly is used to control the gear set to switch between meshing gears with different transmission ratios, and realize the locking transmission and neutral transmission between the intermediate shaft and the output shaft of different gears, and the output shaft cooperates with the power head body for transmission. 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; it controls the drilling speed and torque of the power head body to meet the working needs of different environments, thereby improving the working efficiency.
[0006] Further, 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, 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.
[0014] 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;
[0015] 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;
[0016] 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.
[0017] 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;
[0018] 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.
[0019] 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;
[0020] 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.
[0021] 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;
[0022] 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;
[0023] 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;
[0024] 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;
[0025] 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.
[0026] 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.
[0027] Furthermore, the output shaft is provided with a terminal output gear, the terminal output gear is fixedly connected to the output shaft, and the terminal output gear is transmission-connected to the power head body.
[0028] 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
[0029] Figure 1 This is a schematic diagram of the assembly structure of the utility model and the power head body;
[0030] Figure 2 This is a schematic diagram of the overall structure of the utility model (part of the gearbox housing is removed);
[0031] Figure 3 This is a schematic diagram of the internal structure of the utility model;
[0032] Figure 4 This is a schematic diagram of the output shaft and intermediate shaft structure of the utility model;
[0033] Figure 5 This is a schematic diagram of the output shaft and auxiliary structures of the utility model;
[0034] Figure 6 This is a schematic diagram of the output shaft and auxiliary structure of the utility model (without the coupling sleeve);
[0035] Figure 7 This is a schematic diagram of the structure of the shift assembly of the utility model;
[0036] Figure 8 for Figure 7 The structure of part A is shown in enlarged form;
[0037] Fig. 9 This is a schematic diagram of the back structure of the shift assembly of the utility model;
[0038] Fig.10 It is a side structural diagram of the shift assembly of the utility model;
[0039] Fig.11 This is a schematic diagram of the oblique side structure of the shift assembly of the utility model;
[0040] Fig.12 It is a reference diagram for the up, down, left, and right directions of an embodiment of the utility model;
[0041] Fig.13 It is the input value and the schematic diagram of the pyramid gear structure of the utility model;
[0042] Fig.14 This is a schematic diagram of the structure of the convex key, synchronous convex key and combined groove of the utility model;
[0043] 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; 53. terminal output gear; 24. shift lever; 25. fixed cover plate; 26. shift shaft; 27. shift block; 28 , fork shaft; 29, fork piece; 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, support leg; 39, high-speed gear shift boss; 40, medium and low-speed gear shift boss; 41, limit pin shaft; 42, high-speed gear shift fork piece; 43, medium and low-speed gear shift fork piece; 44, high-speed gear shift fork block; 45, medium and low-speed gear shift fork block; 46, high-speed gear shift fork slide groove; 47, medium and low-speed gear shift fork slide groove; 48, ball screw; 49, grading groove; 50, movable end; 56, base shell; 124, convex key; 125, synchronous convex key; 126, engaging groove.
[0044] x - first direction;
[0045] y - Second direction. DETAILED DESCRIPTION
[0046] 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.
[0047] Comprehensive reference Figure 1-14 .
[0048] A core drilling rig power head gearbox, comprising: an input shaft 3, an intermediate shaft 4, an output shaft 5 and a shift assembly, wherein the input shaft 3 is connected to the driving member in a transmission manner, the input shaft 3 and the intermediate shaft 4 are engaged in gear transmission, the intermediate shaft 4 and the output shaft 5 are correspondingly provided with two or more groups of 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 of different gears, and the output shaft 5 cooperates with the power head body 2 for transmission.
[0049] 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.
[0050] 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.
[0051] 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.
[0052] 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 .
[0053] 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.
[0054] 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.
[0055] 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.
[0056] 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;
[0057] 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.
[0058] 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.
[0059] 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.
[0060] 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.
[0061] 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.
[0062] 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;
[0063] 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;
[0064] 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);
[0065] 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).
[0066] 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.
[0067] by Fig.12 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.
[0068] by Fig.12The 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.
[0069] by Fig.12 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.
[0070] 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 gearbox, characterized in that: include: 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 a driving 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 correspondingly, 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) is matched with the power head body (2) for transmission.
2. The core drilling rig power head gearbox 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 gearbox 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 gearbox 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 gearbox 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 gearbox 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 gearbox 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 gearbox according to claim 1, characterized in that: The output shaft (5) is provided with a terminal output gear (53), the terminal output gear (53) is fixedly connected to the output shaft (5), and the terminal output gear (53) is transmission-connected to the power head body (2).