CN115306296A - Power head for raise boring machine - Google Patents
Power head for raise boring machine Download PDFInfo
- Publication number
- CN115306296A CN115306296A CN202211136477.3A CN202211136477A CN115306296A CN 115306296 A CN115306296 A CN 115306296A CN 202211136477 A CN202211136477 A CN 202211136477A CN 115306296 A CN115306296 A CN 115306296A
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- Prior art keywords
- gear shifting
- shaft
- power head
- gear
- boring machine
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- 239000003638 chemical reducing agent Substances 0.000 claims description 31
- 230000005540 biological transmission Effects 0.000 claims description 29
- 238000007667 floating Methods 0.000 claims description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 239000004744 fabric Substances 0.000 claims description 5
- 238000010276 construction Methods 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 description 8
- 238000005553 drilling Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B3/00—Rotary drilling
- E21B3/02—Surface drives for rotary drilling
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/18—Connecting or disconnecting drill bit and drilling pipe
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/26—Generation or transmission of movements for final actuating mechanisms
- F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
- F16H61/30—Hydraulic or pneumatic motors or related fluid control means therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
- F16H63/30—Constructional features of the final output mechanisms
- F16H63/32—Gear shift yokes, e.g. shift forks
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- General Engineering & Computer Science (AREA)
- General Details Of Gearings (AREA)
Abstract
The invention discloses a power head for a raise boring machine, and belongs to the technical field of construction machinery of boring machines. The gear shifting mechanism is simple in structure and low in cost, and improves gear shifting efficiency and convenience; the gear shifting mechanism is arranged inside and outside the power head, so that the axial size of the power head is reduced, and the space structure of the power head is further optimized.
Description
Technical Field
The invention relates to a power head for a raise boring machine, and belongs to the technical field of construction machinery of boring machines.
Background
The raise drilling machine is mainly used for hydropower stations, underground mine drilling, ventilation shaft expansion, filling wells, pipe shafts and the like, and can also be used for underground excavation of large-section raises and drop shafts of mines. The well completion procedure of the raise boring machine comprises drilling and reaming: firstly, a guide hole with a smaller diameter is drilled downwards, after the guide hole is communicated, the hole-expanding cutter head is horizontally replaced at the lower part, and then the hole is expanded into a raise with a larger diameter from the bottom to the top.
As one of core components of the raise boring machine, the structural form, power output and reliability of a power head directly influence the boring capacity and service life of the raise boring machine. In the conventional power head of the raise boring machine, the gear shifting type power head is small in space size and high in drilling capability, is a power head for the raise boring machine with relatively high technical level, and is found to have the following problems according to market feedback:
1. the structure of the gear shifting mechanism is complex, the gear shifting efficiency is low, the axial size of the gear shifting mechanism is large, and the overall size of the power head is influenced;
2. the circulating water pipe is sealed by adopting a packing, the application effect is not ideal, and the problem of leakage at the sealing part of the water pipe exists;
3. oil leakage of an output end oil seal: when the power head works in an inclined state, the floating sleeve can bear radial force, so that a planet carrier connected with the floating sleeve can also bear radial force, and a bearing for supporting the planet carrier is a thrust self-aligning roller bearing and cannot bear large radial force, so that the power head can incline, an oil seal at the output end cannot be attached to a sealing surface, and an oil leakage phenomenon occurs;
4. the drilling rod weight is great, utilizes the manpower to carry out manual pole changing, trades the pole inefficiency, influences raise boring machine's work efficiency, has the potential safety hazard simultaneously.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a power head for a raise boring machine, which aims to solve the problems that the power head gear shifting mechanism for the raise boring machine in the prior art is complex in structure and low in gear shifting efficiency.
In order to achieve the purpose, the invention is realized by adopting the following scheme:
the invention provides a power head for a raise boring machine, which comprises a shell, a motor, a two-stage planetary reducer, a gear shifting mechanism and a floating sleeve, wherein the motor is arranged on the shell; the motor, the two-stage planetary reducer and the floating sleeve are arranged in the shell; the gear shifting mechanism comprises a gear shifting oil cylinder, a gear shifting execution shaft, a gear shifting fork and a gear shifting shaft; the gear shifting oil cylinder is fixed outside the shell, and the output end of the gear shifting oil cylinder is fixedly connected with a gear shifting execution shaft which is rotatably connected in the shell; the gear shifting fork is fixed on the gear shifting executing shaft, and a fork foot of the gear shifting fork is in clearance connection with an annular groove arranged on the gear shifting shaft; the upper end and the lower end of the gear shifting shaft are respectively connected with an output shaft of the motor and the two-stage planetary reducer; the upper end and the lower end of the floating sleeve are respectively connected with the two-stage planetary reducer and the drill rod.
Preferably, the gear shifting oil cylinder is connected with the gear shifting execution shaft through a gear shifting transmission arm, the gear shifting transmission arm is arranged outside the shell, one end of the gear shifting transmission arm is fixedly connected with an output piston rod of the gear shifting oil cylinder, and the other end of the gear shifting transmission arm is fixedly connected with the gear shifting execution shaft.
Preferably, a plurality of groups of bushings are further installed on the outer side of the gear shifting execution shaft in a matched mode, and the plurality of groups of bushings are installed in the shell.
Preferably, a limiting mechanism is arranged at the joint of the gear shifting transmission arm and an output piston rod of the gear shifting oil cylinder, and comprises a limiting plate and a limiting post, the limiting plate is fixed on the shell, and the limiting post is arranged at one end, far away from the gear shifting oil cylinder, of the limiting plate and used for limiting rotation of the gear shifting transmission arm.
Preferably, the two-stage planetary reducer comprises a first-stage planetary reducer and a second-stage planetary reducer; the primary planetary reducer comprises a primary sun gear, a primary planet carrier, three primary planet gears and a small gear ring which are mutually meshed and uniformly distributed along the circumference; the secondary planetary reducer comprises a secondary sun gear, a secondary planet carrier, four secondary planet gears and a large gear ring which are mutually meshed, wherein the four secondary planet gears and the large gear ring are uniformly distributed along the circumference; the primary planet carrier and the secondary sun gear are connected through a transmission shaft; after the gear shifting shaft is subjected to gear shifting operation, the lower end of the gear shifting shaft is respectively connected with a primary sun gear or a primary planet carrier; the upper end of the floating sleeve is connected with the secondary planet carrier.
Preferably, the upper end and the lower end of the transmission shaft and the gear shifting shaft are both provided with splines, and the gear shifting shaft is in clearance connection with an output shaft of the motor, a first-stage sun gear and a first-stage planet carrier through the splines; the upper end of the floating sleeve is provided with an external spline which is connected with the internal spline of the secondary planet carrier in a matching way, and the lower end of the floating sleeve is provided with an internal conical thread which is used for connecting a drill rod.
Preferably, the secondary planet carrier is installed in the shell in a matching manner with two self-aligning thrust roller bearings and one cylindrical roller bearing.
Preferably, the device also comprises a rod changing mechanism, wherein the rod changing mechanism comprises a rod changing oil cylinder, a bracket, a tray, a shifting block and a sliding block; the rod changing oil cylinder is fixed on the outer side of the lower end of the shell through a support, the bracket is rotatably connected to the support, one end of the bracket is connected with an output piston rod of the rod changing oil cylinder, and the other end of the bracket is fixedly connected with a tray which is annularly arranged on the outer side of the lower end of the shell; the middle part of the shifting block is rotatably connected to the outer side of the lower end of the shell, one end of the shifting block is in contact connection with the tray, and the other end of the shifting block is rotatably connected with the sliding block; the sliding block is connected in a sliding groove arranged at the lower end of the shell in a sliding mode and used for clamping the drill rod.
Preferably, still include circulating pipe, circulating pipe includes elbow and center tube, and the junction of elbow and center tube adopts bolt and nut subassembly to connect and presss from both sides cloth V group and seal.
Compared with the prior art, the invention has the following beneficial effects:
1. the gear shifting mechanism is simple in structure and low in cost, and improves gear shifting efficiency and convenience; the gear shifting mechanism is arranged inside and outside the power head, so that the axial size of the power head is reduced, and the space structure of the power head is further optimized.
2. The gear shifting mechanism is driven by the single oil cylinder with the limit, so that the structure is compact, and the gear shifting is reliable.
3. The invention is provided with a centralizing bearing structure to resist radial swinging force in an inclined state, thereby avoiding oil leakage at the output end and ensuring stable operation of the power head in the inclined state.
4. According to the invention, the hydraulic rod replacing mechanism is adopted to replace manual rod replacement, so that the labor intensity is reduced, the potential safety hazard of rod replacement is reduced, and the working efficiency is improved.
5. The circulating water pipe is provided with an adjustable sealing connection structure, so that the phenomenon that slag discharge water enters the power head due to leakage at the sealing part of the circulating water pipe is avoided, and the circulating water pipe can effectively lubricate and cool a drilling tool and discharge cutting rock debris.
Drawings
Fig. 1 is an internal cross-sectional view of a power head for a raise boring machine according to an embodiment of the present invention;
FIG. 2 is a partial cross-sectional view of a gear shifting mechanism of a power head for a raise boring machine according to an embodiment of the present invention;
FIG. 3 is an enlarged cross-sectional view of the water seal shown at I in FIG. 1;
fig. 4 is an external structural schematic diagram of a power head for a raise boring machine according to an embodiment of the present invention;
in the figure: 01. a motor; 11. a cloth clamping V group; 12. a bolt and nut assembly; 13. bending the pipe; 14. a central tube; 21. a gear shifting oil cylinder; 22. a piston rod; 23. a shift transmission arm; 24. a shift execution shaft; 25. a small bushing; 26. a large bushing; 27. a gear shifting fork; 28. a shift shaft; 29. a limiting plate; 30. a limiting column; 31. a primary planet carrier; 32. a primary sun gear; 33. a secondary planet carrier; 34. a floating sleeve; 35. a first thrust self-aligning roller bearing; 36. a second thrust self-aligning roller bearing; 37. a cylindrical roller bearing; 38. oil sealing; 41. a support; 42. a rod changing oil cylinder; 43. a bracket; 44. a tray; 45. shifting blocks; 46. a slider; 51. a primary planet wheel; 52. a small gear ring; 53. a drive shaft; 54. a secondary sun gear; 55. a secondary planet wheel; 56. a large gear ring.
Detailed Description
Specific implementations of the present invention are further described below in conjunction with the following figures. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
As shown in fig. 1, 2, 3 and 4, the embodiment provides a power head for a raise boring machine, which includes a housing, a motor 01, a two-stage planetary reducer, a gear shifting mechanism and a floating sleeve 34, wherein power output by the motor 01 is speed-regulated by the gear shifting mechanism and then transmitted to the two-stage planetary reducer, the two-stage planetary reducer transmits power to the floating sleeve 34, and the floating sleeve 34 transmits power to a drill rod connected with the floating sleeve to realize rotation of the drill rod.
Specifically, motor 01, two-stage planetary reducer and floating sleeve 34 are installed in the casing, and two-stage planetary reducer includes one-level planetary reducer and second grade planetary reducer: the primary planetary reducer comprises a primary sun gear 32, a primary planet carrier 31, three primary planet gears 51 and a small gear ring 52 which are mutually meshed and uniformly distributed along the circumference; the secondary planetary reducer comprises a secondary sun gear 54, a secondary planet carrier 33, four secondary planet gears 55 and a large gear ring 56 which are mutually meshed and evenly distributed along the circumference. The first-stage planet carrier 31 and the second-stage sun gear 54 are connected through a spline arranged on the transmission shaft 53 and used for power transmission between the two stages of planetary speed reducers.
The gear shifting mechanism comprises a gear shifting oil cylinder 21, a gear shifting execution shaft 24, a gear shifting fork 27 and a gear shifting shaft 28, the gear shifting oil cylinder 21 is fixed outside the shell, an output piston rod 22 of the gear shifting oil cylinder is fixedly connected with the gear shifting execution shaft 24 which is rotatably connected in the shell, the gear shifting fork 27 is fixed on the gear shifting execution shaft 24, and a fork foot of the gear shifting fork is in clearance connection with an annular groove arranged on the gear shifting shaft 28; the upper end and the lower end of the gear shifting shaft 28 are both provided with splines, the upper end of the gear shifting shaft is connected with the output shaft of the motor 01 through small clearance fit of the splines, and the lower end of the gear shifting shaft is respectively connected with the first-stage sun gear 32 or the first-stage planet carrier 31 through small clearance fit of the splines after gear shifting operation of the gear shifting mechanism, so that two working conditions of the power head are realized. The upper end of the floating sleeve 34 is provided with an external spline which is matched and connected with an internal spline at the lower end of the secondary planet carrier 33, and the lower end of the floating sleeve is provided with an internal conical thread which is used for connecting a drill rod.
The gear shifting oil cylinder 21 is connected with a gear shifting execution shaft 24 through a gear shifting transmission arm 23, the gear shifting transmission arm 23 is arranged outside the shell, one end of the gear shifting transmission arm is fixedly connected with an output piston rod 22 of the gear shifting oil cylinder 21, and the other end of the gear shifting transmission arm is fixedly connected with the gear shifting execution shaft 24. The outer side of the gear shifting execution shaft 24 is also provided with a small bushing 25 and a large bushing 26 in a matching way, the small bushing and the large bushing are both arranged in the shell, and the gear shifting execution shaft 24 is matched with the large bushing and the small bushing and can rotate in the bushing hole, so that the reliability of gear shifting operation is improved.
The gear shifting mechanism is simple in structure and low in cost, and gear shifting efficiency and convenience are improved; the gear shifting mechanism is arranged inside and outside the power head, so that the axial size of the power head is reduced, and the space structure of the power head is further optimized.
The joint of the gear shifting transmission arm 23 and the output piston rod 22 of the gear shifting oil cylinder 21 is provided with a limiting mechanism which comprises a limiting plate 29 and a limiting post 30, the limiting plate 29 is fixed on the shell, the limiting post 30 is arranged at one end, far away from the gear shifting oil cylinder 21, of the limiting plate for limiting the rotation of the gear shifting transmission arm 23, the gear shifting mechanism is driven by a single oil cylinder with limiting, the structure is compact, and gear shifting is reliable.
The secondary planet carrier 33, two self-aligning thrust roller bearings (a first self-aligning thrust roller bearing 35 and a second self-aligning thrust roller bearing 36) and a cylindrical roller bearing 37 are installed in the shell in a matched mode, the cylindrical roller bearing 37 can resist radial force, the secondary planet carrier 33 is guaranteed not to incline, accordingly, an oil seal 38 at the output end of the power head is guaranteed to be attached to a sealing surface, and oil leakage is avoided; the first self-aligning thrust roller bearing 35 and the second self-aligning thrust roller bearing 36 can resist axial force; therefore, the secondary planet carrier 33 is supported by the three bearings when the power head is in two working conditions, and stable operation of the power head is ensured.
In addition, the invention also comprises a rod changing mechanism and a circulating water pipe. The rod changing mechanism comprises a rod changing oil cylinder 42, a bracket 43, a tray 44, a shifting block 45 and a sliding block 46, the rod changing oil cylinder 42 is fixed on the outer side of the lower end of the shell through a support 41, the bracket 43 is rotatably connected to the support 41, one end of the bracket 43 is connected with an output piston rod of the rod changing oil cylinder 42, the other end of the bracket is fixedly connected with the tray 44 which is annularly arranged on the outer side of the lower end of the shell, the middle of the shifting block 45 is rotatably connected to the outer side of the lower end of the shell, one end of the shifting block is in contact connection with the tray 44, the other end of the shifting block is rotatably connected with the sliding block 46, and the sliding block 46 is slidably connected in a sliding groove formed in the lower end of the shell and used for clamping a drill rod. The hydraulic rod replacing mechanism is adopted to replace manual rod replacement, so that the labor intensity is reduced, the potential safety hazard of rod replacement is reduced, and the working efficiency is improved.
Circulating pipe includes elbow 13 and center tube 14, and the junction of elbow and center tube adopts the bolt and nut subassembly to connect and press from both sides cloth V group and seal, specifically, adopts nut and stud subassembly 12 adjustment structure, thereby compresses tightly through adjusting nut's the degree of screwing up and press from both sides cloth V group 11, can guarantee that water pipe seal does not reveal. The circulating pipe is designed with an adjustable sealing connection structure, so that the phenomenon that slag discharge water enters the power head due to leakage at the sealing part of the circulating pipe is avoided, and the circulating pipe can effectively lubricate and cool the drilling tool and discharge cutting debris.
The working principle is as follows:
the power head has two working conditions:
one) high speed low torque condition: the speed is reduced only by the two-stage planetary speed reducing mechanism, the speed reducing ratio is small, the speed reducing and torque increasing degree is small, and therefore the high-speed low-torque state is achieved. The method comprises the following specific steps: the motor 01 outputs power, the gear shifting shaft 28 is in an upper gear, a spline at the lower end is directly connected with the first-stage planet carrier 31, the first-stage planet carrier 31 drives the transmission shaft 53, the transmission shaft 53 drives the second-stage sun gear 54 to reduce speed through the second-stage planetary reducer, the second-stage planet carrier 55 outputs torque, and finally the torque is transmitted to the floating sleeve 34 to drive the drill rod to work.
Second) low speed high torque condition: the speed is reduced by the first-stage planetary reducer and the second-stage planetary reducer, the reduction ratio is large, the speed reduction and torque increase degree is large, and therefore the low-speed and high-torque state is achieved. The method specifically comprises the following steps: the motor 01 outputs power, the gear shifting shaft 28 is in a lower gear, the lower end of the gear shifting shaft is in splined connection with the first-stage sun gear 32, the gear shifting shaft is decelerated through the first-stage planetary speed reducing mechanism, torque is transmitted to the transmission shaft 53 through the first-stage planetary carrier 31, the transmission shaft 53 transmits the torque to the second-stage sun gear 54, the gear shifting shaft is decelerated through the second-stage planetary speed reducing mechanism, the torque is output through the second-stage planetary carrier 55, and finally the torque is transmitted to the floating sleeve 34 to drive the drill rod to work.
During gear shifting, the motor 01 stops working, the gear shifting shaft 28 stops rotating, the gear shifting oil cylinder 21 acts to drive the gear shifting execution shaft 24 to rotate, and the gear shifting fork 27 rotates along with the gear shifting execution shaft 24 to drive the gear shifting shaft 28 to move up and down. Specifically, the method comprises the following steps: when the upper gear is shifted to the lower gear, the spline at the lower end of the shift shaft 28 is separated from the first-stage planet carrier 31 and is connected with the first-stage sun gear 32; when the lower gear is shifted to the upper gear, the spline at the lower end of the shift shaft 28 is disengaged from the primary sun gear 32 and connected to the primary carrier 31.
When the motor 01 works, the gear shifting shaft 28 rotates, the gear shifting oil cylinder 21 is in a holding position, the gear shifting fork 27 is guaranteed to be fixed, the gear shifting shaft 28 is limited by the middle annular groove not to axially move, and the gear shifting shaft 28 is further guaranteed to be located on a gear.
When the rod is replaced, the rod replacing oil cylinder 42 acts to drive the bracket 43 to rotate, the bracket 43 drives the tray 44 to move up and down, the tray 44 touches the shifting block 45 to drive the shifting block 45 to rotate, the shifting block 45 rotates to push the sliding block 46 to slide, so that the drill rod is clamped quickly, and the rod is replaced quickly.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (9)
1. A power head for a raise boring machine is characterized by comprising a shell, a motor, a two-stage planetary reducer, a gear shifting mechanism and a floating sleeve; the motor, the two-stage planetary reducer and the floating sleeve are arranged in the shell; the gear shifting mechanism comprises a gear shifting oil cylinder, a gear shifting execution shaft, a gear shifting fork and a gear shifting shaft; the gear shifting oil cylinder is fixed outside the shell, and the output end of the gear shifting oil cylinder is fixedly connected with a gear shifting execution shaft which is rotatably connected in the shell; the gear shifting fork is fixed on the gear shifting execution shaft, and a fork foot of the gear shifting fork is in clearance connection with an annular groove arranged on the gear shifting shaft; the upper end and the lower end of the gear shifting shaft are respectively connected with an output shaft of the motor and the two-stage planetary reducer; the upper end and the lower end of the floating sleeve are respectively connected with the two-stage planetary reducer and the drill rod.
2. The power head for the raise boring machine according to claim 1, wherein the shift cylinder is connected to the shift execution shaft through a shift transmission arm, the shift transmission arm being disposed outside the housing, one end of the shift transmission arm being fixedly connected to an output piston rod of the shift cylinder, and the other end of the shift transmission arm being fixedly connected to the shift execution shaft.
3. The power head for the raise boring machine according to claim 2, wherein a plurality of sets of bushings are further fittingly mounted to an outer side of the shift actuating shaft, and the plurality of sets of bushings are mounted in the housing.
4. The power head for the raise boring machine according to claim 2, wherein a limiting mechanism is arranged at a joint of the gear shifting transmission arm and an output piston rod of the gear shifting cylinder, and comprises a limiting plate and a limiting post, the limiting plate is fixed on the housing, and the limiting post is arranged at one end of the limiting plate, which is far away from the gear shifting cylinder, and used for limiting rotation of the gear shifting transmission arm.
5. The power head for a raise boring machine according to claim 1, wherein the two-stage planetary reducer includes a one-stage planetary reducer and a two-stage planetary reducer; the primary planetary reducer comprises a primary sun gear, a primary planet carrier, three primary planet gears and a small gear ring which are mutually meshed and uniformly distributed along the circumference; the secondary planetary reducer comprises a secondary sun gear, a secondary planet carrier, four secondary planet gears and a large gear ring which are mutually meshed, wherein the four secondary planet gears and the large gear ring are uniformly distributed along the circumference; the primary planet carrier and the secondary sun gear are connected through a transmission shaft; after the gear shifting shaft is subjected to gear shifting operation, the lower end of the gear shifting shaft is respectively connected with a primary sun gear or a primary planet carrier; the upper end of the floating sleeve is connected with the secondary planet carrier.
6. The power head for the raise boring machine according to claim 5, wherein splines are provided at upper and lower ends of the transmission shaft and the shift shaft, and the shift shaft is in clearance connection with an output shaft of the motor, the first-stage sun gear and the first-stage planet carrier through the splines; the upper end of the floating sleeve is provided with an external spline which is in fit connection with an internal spline of the secondary planet carrier, and the lower end of the floating sleeve is provided with an internal conical thread which is used for connecting a drill rod.
7. The power head for a raise boring machine according to claim 5, wherein the secondary planet carrier is mounted in the housing in cooperation with two self-aligning thrust roller bearings and a cylindrical roller bearing.
8. The power head for the raise boring machine according to claim 1, further comprising a rod changing mechanism, wherein the rod changing mechanism comprises a rod changing cylinder, a bracket, a tray, a shifting block and a sliding block; the rod changing oil cylinder is fixed on the outer side of the lower end of the shell through a support, the bracket is rotatably connected to the support, one end of the bracket is connected with an output piston rod of the rod changing oil cylinder, and the other end of the bracket is fixedly connected with a tray which is annularly arranged on the outer side of the lower end of the shell; the middle part of the shifting block is rotatably connected to the outer side of the lower end of the shell, one end of the shifting block is in contact connection with the tray, and the other end of the shifting block is rotatably connected with the sliding block; the sliding block is connected in a sliding groove arranged at the lower end of the shell in a sliding mode and used for clamping the drill rod.
9. The power head for the raise boring machine according to claim 1, further comprising a circulating water pipe, wherein the circulating water pipe comprises an elbow and a central pipe, and the joint of the elbow and the central pipe is connected by a bolt and nut assembly and sealed by a cloth clamping V group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211136477.3A CN115306296A (en) | 2022-09-19 | 2022-09-19 | Power head for raise boring machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211136477.3A CN115306296A (en) | 2022-09-19 | 2022-09-19 | Power head for raise boring machine |
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| Publication Number | Publication Date |
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| CN115306296A true CN115306296A (en) | 2022-11-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211136477.3A Pending CN115306296A (en) | 2022-09-19 | 2022-09-19 | Power head for raise boring machine |
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| CN (1) | CN115306296A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116771882A (en) * | 2023-06-06 | 2023-09-19 | 郑机所(郑州)传动科技有限公司 | Vertical planetary gear transmission device for drilling machine |
-
2022
- 2022-09-19 CN CN202211136477.3A patent/CN115306296A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116771882A (en) * | 2023-06-06 | 2023-09-19 | 郑机所(郑州)传动科技有限公司 | Vertical planetary gear transmission device for drilling machine |
| CN116771882B (en) * | 2023-06-06 | 2024-07-02 | 郑机所(郑州)传动科技有限公司 | Vertical planetary gear transmission device for drilling machine |
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