CN107947455B - Medical hand-held electric drill - Google Patents
Medical hand-held electric drill Download PDFInfo
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- CN107947455B CN107947455B CN201711429898.4A CN201711429898A CN107947455B CN 107947455 B CN107947455 B CN 107947455B CN 201711429898 A CN201711429898 A CN 201711429898A CN 107947455 B CN107947455 B CN 107947455B
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- output shaft
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- assembly
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- 230000001105 regulatory effect Effects 0.000 claims abstract description 12
- 230000002093 peripheral effect Effects 0.000 claims description 21
- 229910000831 Steel Inorganic materials 0.000 claims description 19
- 239000010959 steel Substances 0.000 claims description 19
- 125000006850 spacer group Chemical group 0.000 claims description 8
- 239000011324 bead Substances 0.000 claims description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
- A61B17/1613—Component parts
- A61B17/162—Chucks or tool parts which are to be held in a chuck
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
- A61B17/1613—Component parts
- A61B17/1628—Motors; Power supplies
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
- A61B17/1613—Component parts
- A61B17/1633—Sleeves, i.e. non-rotating parts surrounding the bit shaft, e.g. the sleeve forming a single unit with the bit shaft
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
- H02K7/145—Hand-held machine tool
Abstract
The invention discloses a medical hand-held electric drill, which comprises a casing, a quick-mounting sleeve, a motor stator, a motor rotor, a speed reducing mechanism, an output shaft, a chuck mechanism, a quick-dismounting mechanism, a speed regulating assembly and a motor driving plate, wherein the casing is provided with a motor stator and a motor rotor; the quick assembly sleeve is arranged at the left part of the shell; the motor stator is arranged at the right part of the inner cavity of the shell; the motor rotor is arranged in the motor stator and sleeved on the motor rotating shaft; the motor rotor is of a hollow structure and is connected with the input end of the speed reducing mechanism; the speed reducing mechanism is sleeved on the output shaft, and the output end of the speed reducing assembly is connected with the output shaft; the left part of the output shaft extends into the inner cavity of the quick-mounting sleeve; the tail part of the chuck mechanism is connected with an output shaft, and the chuck mechanism is arranged on the quick-mounting sleeve through a quick-dismounting mechanism; the chuck mechanism is connected with the output shaft; the speed regulating component and the motor driving plate are both arranged in the handle of the shell. The invention has smaller output vibration amplitude, greatly reduces the operation risk caused by large-amplitude vibration of medical instruments, and has convenient and quick disassembly and assembly of the chuck mechanism.
Description
Technical Field
The invention relates to a medical hand-held electric drill.
Background
Medical hand-held electric drills are widely used in modern medical treatment. The medical hand-held electric drill mainly comprises a speed reducing motor and a chuck, the existing speed reducing motor is usually used for realizing speed reduction through multi-stage gear combination, and various problems exist, such as large volume, large vibration amplitude, large noise, unstable speed reducing gear set and the like. Therefore, it is necessary to design a medical hand-held electric drill with small volume and stable structure.
Disclosure of Invention
The invention aims to provide a medical hand-held electric drill with small volume and stable structure.
The technical scheme for realizing the aim of the invention is as follows: a medical hand-held electric drill comprises a casing, a quick-mounting sleeve, a motor stator, a motor rotor, a speed reducing mechanism, an output shaft, a chuck mechanism, a quick-dismounting mechanism, a speed regulating assembly and a motor driving plate; the quick assembly sleeve is arranged at the left part of the shell; the motor stator is arranged at the right part of the inner cavity of the shell; the motor rotor is arranged in the motor stator and sleeved on the motor rotating shaft; the motor rotor is of a hollow structure and is connected with the input end of the speed reducing mechanism; the speed reducing mechanism is sleeved on the output shaft, and the output end of the speed reducing assembly is connected with the output shaft; the left part of the output shaft extends into the inner cavity of the quick-mounting sleeve; the tail part of the chuck mechanism is connected with an output shaft, and the chuck mechanism is arranged on the quick-mounting sleeve through a quick-dismounting mechanism; the chuck mechanism is connected with an output shaft; the speed regulating assembly and the motor driving plate are both arranged in the handle of the shell.
The speed reducing mechanism comprises a first planetary gear speed reducing assembly, a sun gear and a second planetary gear speed reducing assembly; the input end of the first-stage planetary gear speed reduction assembly is connected with a motor rotor, and the output end of the first-stage planetary gear speed reduction assembly is connected with a sun gear; the sun gear is sleeved on the output shaft; and the input end of the second-stage planetary gear speed reduction assembly is connected with a sun gear, and the output end of the second-stage planetary gear speed reduction assembly is connected with an output shaft.
The first-stage planetary gear speed reduction assembly comprises a first-stage planetary gear carrier and a first-stage planetary gear; the first-stage planet carrier is sleeved on the sun gear, and the inner ring is meshed with the sun gear; a plurality of first rotating shafts perpendicular to the side wall of the first-stage planet carrier are uniformly arranged on the first-stage planet carrier along the circumferential direction; the first-stage planetary gears are provided with a plurality of first rotating shafts and are respectively sleeved on each first rotating shaft; internal teeth are uniformly distributed on the inner peripheral surface of the shell along the circumferential direction; the first-stage planetary gears are respectively meshed with the internal teeth and the motor rotor.
A gasket is arranged between the first-stage planet carrier and the first-stage planet wheel on a first rotating shaft of the first-stage planet carrier of the first-stage planet wheel speed reduction assembly; and a check ring for limiting the axial movement of the first-stage planet wheel is arranged on the first rotating shaft.
The second planetary gear speed reduction assembly comprises a second-stage planetary carrier and a second planetary gear; the second-stage planet carrier is meshed with teeth uniformly distributed on the peripheral surface of the output shaft along the circumferential direction; a plurality of second rotating shafts perpendicular to the side wall of the second-stage planet carrier are uniformly arranged on the second-stage planet carrier along the circumferential direction; the second-stage planetary gears are provided with a plurality of second planetary gears and are respectively sleeved on each second rotating shaft; the second planet gears are respectively meshed with the inner teeth of the shell and the sun gear.
A gasket is arranged between the second planet carrier and the second-stage planet wheel on a second rotating shaft of the second-stage planet carrier of the second planet wheel speed reduction assembly; and a check ring for limiting the axial movement of the second planet wheel is arranged on the second rotating shaft.
The device also comprises an output shaft rotating assembly and a rotor rotating assembly; the output shaft rotating assembly comprises a first bearing, a second bearing and a third bearing; the first bearing and the second bearing are both arranged in the inner peripheral surface of the quick-mounting sleeve, and the inner rings of the first bearing and the second bearing are both sleeved on the left part of the output shaft; a rear end cover with a hollow interior is arranged in the inner cavity of the right end of the shell; the third bearing is arranged on the inner peripheral surface of the rear end cover, and the inner ring of the third bearing is sleeved on the right part of the output shaft; the rotor rotating assembly comprises a fourth bearing and a fifth bearing; the shell is provided with a middle spacer block with a hollow inside on the inner peripheral surface between the motor stator and the speed reducing mechanism; the fourth bearing is arranged on the inner peripheral surface of the middle spacer block, and the inner ring is sleeved on the left end of the motor rotor; the fifth bearing is arranged on the inner peripheral surface of the rear end cover, and the inner ring is sleeved on the right part of the motor rotor.
The quick dismounting mechanism comprises a front nut, a spring, a ball pressing sleeve and a steel ball; the right part of the front nut is in threaded connection with the outer wall of the quick-mounting sleeve, and a gap is arranged between the left part and the quick-mounting sleeve; the ball pressing sleeve is in sliding connection with the outer wall of the quick-mounting sleeve at the left side of the front nut; the spring is sleeved on the outer wall between the quick-mounting sleeve and the front nut; through holes are uniformly distributed in the fast-assembling sleeve along the axial direction; the steel balls are arranged in the through holes, and the ball pressing sleeve pushes the steel balls to enable the steel balls to clamp the chuck mechanism.
The chuck mechanism comprises a chuck connecting sleeve, a chuck connecting rod and a chuck; the chuck connecting sleeve extends into the inner cavity of the quick-mounting sleeve, and a hemispherical groove matched with the steel ball is formed in the outer wall of the chuck connecting sleeve; a sixth bearing is arranged in the inner cavity of the chuck connecting sleeve; the chuck connecting rod is fixed with the inner ring of the sixth bearing, and two ends of the chuck connecting rod are respectively connected with the chuck and the output shaft.
The battery box is also included; the battery box is arranged on the bottom of the handle of the shell; the battery of the battery box supplies power for the motor driving plate; the speed regulating assembly and the motor stator are electrically connected with the motor driving plate.
By adopting the technical scheme, the invention has the following beneficial effects: (1) The speed reducing mechanism and the motor are integrally designed, so that the whole volume is greatly reduced, the speed reducing mechanism is convenient to install on a handheld medical instrument for use, the output vibration amplitude is small, the surgical risk caused by the large-amplitude vibration of the medical instrument is greatly reduced, and the chuck mechanism is convenient and quick to disassemble and assemble.
(2) The speed reducing mechanism has ingenious structure, can stably weaken the kinetic energy transmitted by the motor rotor and transmit the kinetic energy to the output shaft, and is extremely stable in structure and not easy to drop off the wheel.
(3) The output shaft rotating assembly and the rotor rotating assembly of the present invention greatly enhance the overall stability.
(4) The quick dismounting mechanism provided by the invention can be used for quickly and conveniently mounting the chuck mechanism.
Drawings
In order that the invention may be more readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings, in which
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic structural view of the chuck mechanism of the present invention.
Fig. 3 is a schematic structural view of the quick release mechanism of the present invention.
Fig. 4 is a schematic structural diagram of the reduction mechanism of the present invention cooperating with an output shaft.
The reference numerals in the drawings are:
the device comprises a shell 1, a handle 1-1, internal teeth 1-2, a rear end cover 1-3 and a middle spacer block 1-4;
the motor comprises a quick-mounting sleeve 2, a through hole 2-1, a motor stator 3 and a motor rotor 4;
the device comprises a speed reducing mechanism 5, a sun gear 5-1, a first-stage planet carrier 5-2, a first rotating shaft 5-2-1, a first-stage planet wheel 5-3, a second-stage planet carrier 5-4, a second rotating shaft 5-4-1 and a second-stage planet wheel 5-5;
an output shaft 6;
the clamping head mechanism 7, a clamping head connecting sleeve 7-1, a hemispherical groove 7-1-1, six bearings 7-1-2, a clamping head connecting rod 7-2 and a clamping head 7-3;
the quick dismounting mechanism 8, the front nut 8-1, the spring 8-2, the ball pressing sleeve 8-3 and the steel ball 7-4;
a speed regulating assembly 9 and a motor driving plate 10;
an output shaft rotating assembly 11, a first bearing 11-1, a second bearing 11-2 and a third bearing 11-3;
a rotor turning assembly 12, a fourth bearing 12-1, a fifth bearing 12-2.
Detailed Description
Example 1
Referring to fig. 1 to 4, the medical hand-held electric drill of the present embodiment comprises a casing 1, a quick-mounting sleeve 2, a motor stator 3, a motor rotor 4, a speed reducing mechanism 5, an output shaft 6, a chuck mechanism 7, a quick-dismounting mechanism 8, a speed regulating assembly 9 and a motor drive plate 10. The quick-mounting sleeve 2 is arranged at the left part of the casing 1. The motor stator 3 is arranged at the right part of the inner cavity of the shell 1. The motor rotor 4 is arranged in the motor stator 3 and sleeved on the motor rotating shaft 5. The motor rotor 4 is of a hollow structure and is connected with the input end of the speed reducing mechanism 5. The speed reducing mechanism 5 is sleeved on the output shaft 6, and the output end of the speed reducing assembly 5 is connected with the output shaft 6. The left part of the output shaft 6 extends into the inner cavity of the quick-mounting sleeve 2. The tail of the chuck mechanism 6 is connected with an output shaft, and the chuck mechanism 6 is arranged on the quick-mounting sleeve 2 through a quick-dismounting mechanism 7. The chuck mechanism 6 is connected with the output shaft 6. The speed regulating component 9 and the motor driving plate 10 are both arranged in the handle 1-1 of the casing 1. And also includes a battery compartment 13. The battery box 13 is mounted on the bottom of the handle 1-1 of the casing 1. The battery box 13 is detachably and fixedly connected with the machine shell 1. The battery 12-1 of the battery compartment 12 supplies power to the motor drive board 10. The speed regulating assembly 9 and the motor stator 3 are electrically connected with a motor driving plate 10.
The speed reducing mechanism 5 comprises a first-stage planetary gear speed reducing assembly, a sun gear 5-1 and a second-stage planetary gear speed reducing assembly. The input end of the first-stage planetary gear speed reduction assembly is connected with the motor rotor 4, and the output end of the first-stage planetary gear speed reduction assembly is connected with the sun gear 5-1. The sun gear 5-1 is sleeved on the output shaft 6. The input end of the second-stage planetary gear speed reduction assembly is connected with the sun gear 5-1, and the output end of the second-stage planetary gear speed reduction assembly is connected with the output shaft 6.
The first planetary reduction assembly includes a first stage planet carrier 5-2 and a first stage planet 5-3. The first-stage planet carrier 5-2 is sleeved on the sun gear 5-1, and the inner ring is connected with the sun gear 5-1. A plurality of first rotating shafts 5-2-1 which are perpendicular to the side wall of the first-stage planet carrier 5-2 are uniformly arranged on the first-stage planet carrier 5-2 along the circumferential direction. The first-stage planetary gears 5-3 are provided with a plurality of first-stage planetary gears and are respectively sleeved on each first rotating shaft 5-2-1. Internal teeth 1-2 are uniformly distributed on the inner peripheral surface of the shell 1 along the circumferential direction. The first stage planetary gears 5-3 mesh with the internal teeth 1-2 and the motor rotor 4, respectively.
A spacer is provided between the first stage planet carrier 5-2 and the first stage planet 5-3 on the first shaft 5-2-1 of the first stage planet carrier 5-2 of the first stage planet reduction assembly. The first rotating shaft 5-2-1 is provided with a check ring for limiting the axial movement of the first-stage planet wheel 5-3.
The second-stage planetary gear reduction assembly includes a second-stage planet carrier 5-4 and second-stage planetary gears 5-5. The second-stage planet carrier 5-4 is meshed with teeth uniformly distributed on the peripheral surface of the output shaft 6 along the circumferential direction. A plurality of second rotating shafts 5-4-1 perpendicular to the side wall of the second-stage planet carrier 5-4 are uniformly arranged on the second-stage planet carrier 5-4 along the circumferential direction. The second-stage planetary gears 5-5 are provided with a plurality of second planetary gears and are respectively sleeved on each second rotating shaft 5-4-1. The second-stage planetary gears 5-5 mesh with the internal teeth 1-2 of the housing 1 and the sun gear 5-1, respectively.
A gasket is arranged between the second-stage planetary gear carrier 5-4 and the second-stage planetary gear 5-5 on the second rotating shaft 5-4-1 of the second-stage planetary gear carrier 5-4 of the second-stage planetary gear speed reduction assembly. The second rotating shaft 5-4-1 is provided with a check ring for limiting the axial movement of the second-stage planet wheel 5-5.
Also included are an output shaft turning assembly 11 and a rotor turning assembly 12. The output shaft rotation assembly 11 includes a first bearing 11-1, a second bearing 11-2, and a third bearing 11-3. The first bearing 11-1 and the second bearing 11-2 are both provided in the inner peripheral surface of the quick-fit sleeve 2, and the inner rings of the first bearing 11-1 and the second bearing 11-2 are both sleeved on the left portion of the output shaft 6. The right end inner cavity of the shell 1 is provided with a rear end cover 1-3 with a hollow inside. The third bearing 10-3 is provided on the inner peripheral surface of the rear end cap 1-3, and the inner ring of the third bearing 11-3 is fitted over the right portion of the output shaft 6. The rotor-turning assembly 12 includes a fourth bearing 12-1 and a fifth bearing 12-2. The casing 1 is provided with a middle spacer 1-4 with a hollow inside on the inner peripheral surface between the motor stator 3 and the speed reducing mechanism 5. The fourth bearing 12-1 is provided on the inner peripheral surface of the middle spacer block 1-4, and the inner ring is sleeved on the left end of the motor rotor 4. The fifth bearing 12-2 is provided on the inner peripheral surface of the rear end cap 1-3, and the inner ring is sleeved on the right part of the motor rotor 4.
The quick dismounting mechanism 8 comprises a front nut 8-1, a spring 8-2, a ball pressing sleeve 8-3 and a steel ball 8-4. The right part of the front nut 8-1 is in threaded connection with the outer wall of the quick sleeve 2, and a gap is arranged between the left part and the quick sleeve 2. The bead pressing sleeve 8-3 is connected with the outer wall of the quick-mounting sleeve 2 at the left side of the front nut 8-1 in a sliding manner. The spring 7-2 is sleeved on the outer wall between the steel ball 8-4 and the front nut 8-1. Through holes 2-1 are uniformly distributed on the quick-mounting sleeve 2 along the axial direction. The steel balls 8-4 are arranged in the through holes 2-1, and the ball pressing sleeve 8-3 pushes the steel balls 8-4 to enable the steel balls 8-4 to clamp the chuck mechanism 7. The inner wall of the bead pressing sleeve 8-3 is provided with a groove. The circumferential surface of the through hole 2-1 is provided with a limit rib for preventing the steel ball 8-4 from falling into the inner cavity of the quick-mounting sleeve 2.
The chuck mechanism 7 comprises a chuck connecting sleeve 7-1, a chuck connecting rod 7-2 and a chuck 7-3. The chuck connecting sleeve 7-1 stretches into the inner cavity of the quick-mounting sleeve 2, and a hemispherical groove 7-1-1 matched with the steel ball 8-4 is arranged on the outer wall of the chuck connecting sleeve 7-1. The sixth bearing 7-1-2 is arranged in the inner cavity of the chuck connecting sleeve 7-1. The chuck connecting rod 7-2 is fixed with the inner ring of the sixth bearing 7-1-2, and two ends of the chuck connecting rod are respectively connected with the chuck 7-3 and the output shaft 6. The left end face of the output shaft 6 is provided with a mounting hole for connecting the chuck connecting rod 7-2.
When the ball pressing sleeve is used, the ball pressing sleeve 8-3 is pushed to align the groove with the through hole 2-1 of the quick-mounting sleeve 2, the chuck connecting sleeve 7-1 is stretched into the inner cavity of the quick-mounting sleeve 2 until the hemispherical groove 7-1-1 is aligned with the through hole 2-1, the ball pressing sleeve 8-3 is loosened, the spring 7-2 drives the ball pressing sleeve 8-3 to reset, and the ball pressing sleeve 8-3 pushes the steel balls 8-4 to stretch into the hemispherical groove 7-1-1. The battery 12-1 of the battery box 12 is electrified with the motor stator 3 through the motor driving plate 10, the motor rotor 4 rotates based on the principle that an electrified conductor is stressed in a magnetic field, the motor rotor 4 drives a plurality of first-stage planetary gears 5-3 to do circular motion along the axis of the first-stage planetary frame 5-2, the first-stage planetary gears 5-3 drive the first-stage planetary frame 5-2 to rotate, the first-stage planetary frame 5-2 drives the sun gear 5-1 to rotate, the sun gear 5-1 drives a plurality of second-stage planetary gears 5-5 to do circular motion along the axis of the second-stage planetary frame 5-4, the first-stage planetary gears 5-3 drive the second-stage planetary frame 5-4 to rotate, the second-stage planetary frame 5-4 drives the output shaft 6 to rotate, and the output shaft 6 drives the chuck connecting rod 7-2 and the chuck 7-3 to rotate.
While the foregoing is directed to embodiments of the present invention, other and further details of the invention may be had by the present invention, it should be understood that the foregoing description is merely illustrative of the present invention and that no limitations are intended to the scope of the invention, except insofar as modifications, equivalents, improvements or modifications are within the spirit and principles of the invention.
Claims (4)
1. A medical hand-held electric drill which is characterized in that: the device comprises a shell (1), a quick-mounting sleeve (2), a motor stator (3), a motor rotor (4), a speed reducing mechanism (5), an output shaft (6), a chuck mechanism (7), a quick-dismounting mechanism (8), a speed regulating assembly (9) and a motor driving plate (10); the quick-mounting sleeve (2) is arranged at the left part of the shell (1); the motor stator (3) is arranged at the right part of the inner cavity of the shell (1); the motor rotor (4) is arranged in the motor stator (3) and sleeved on the motor rotating shaft; the motor rotor (4) is of a hollow structure and is connected with the input end of the speed reducing mechanism (5); the speed reducing mechanism (5) is sleeved on the output shaft (6), and the output end of the speed reducing mechanism (5) is connected with the output shaft (6); the left part of the output shaft (6) extends into the inner cavity of the quick-mounting sleeve (2); the tail part of the chuck mechanism (7) is connected with an output shaft, and the chuck mechanism (7) is arranged on the quick-mounting sleeve (2) through a quick-dismounting mechanism (8); the chuck mechanism (7) is connected with the output shaft (6); the speed regulating assembly (9) and the motor driving plate (10) are both arranged in the handle (1-1) of the casing (1); the speed reducing mechanism (5) comprises a first-stage planetary gear speed reducing assembly, a sun gear (5-1) and a second-stage planetary gear speed reducing assembly; the input end of the first-stage planetary gear speed reduction assembly is connected with a motor rotor (4), and the output end of the first-stage planetary gear speed reduction assembly is connected with a sun gear (5-1); the sun gear (5-1) is sleeved on the output shaft (6); the input end of the second-stage planetary gear speed reduction assembly is connected with a sun gear (5-1), and the output end of the second-stage planetary gear speed reduction assembly is connected with an output shaft (6); the first-stage planetary gear speed reduction assembly comprises a first-stage planetary gear carrier (5-2) and a first-stage planetary gear (5-3); the first-stage planet carrier (5-2) is sleeved on the sun gear (5-1), and the inner ring is connected with the sun gear (5-1); a plurality of first rotating shafts (5-2-1) perpendicular to the end face of the first-stage planet carrier (5-2) are uniformly arranged on the first-stage planet carrier (5-2) along the circumferential direction; the first-stage planetary gears (5-3) are provided with a plurality of first-stage planetary gears and are respectively sleeved on each first rotating shaft (5-2-1); internal teeth (1-2) are uniformly distributed on the inner peripheral surface of the shell (1) along the circumferential direction; the first-stage planetary gear (5-3) is meshed with the internal teeth (1-2) and the motor rotor (4) respectively; the second-stage planetary gear speed reduction assembly comprises a second-stage planetary gear carrier (5-4) and second-stage planetary gears (5-5); the second-stage planet carrier (5-4) is meshed with teeth uniformly distributed on the peripheral surface of the output shaft (6) along the circumferential direction; a plurality of second rotating shafts (5-4-1) perpendicular to the end face of the second-stage planet carrier (5-4) are uniformly arranged on the second-stage planet carrier (5-4) along the circumferential direction; the second-stage planetary gears (5-5) are provided with a plurality of second-stage planetary gears and are respectively sleeved on each second rotating shaft (5-4-1); the second-stage planetary gear (5-5) is meshed with the internal teeth (1-2) of the shell (1) and the sun gear (5-1) respectively; the device also comprises an output shaft rotating assembly (11) and a rotor rotating assembly (12); the output shaft rotating assembly (11) comprises a first bearing (11-1), a second bearing (11-2) and a third bearing (11-3); the first bearing (11-1) and the second bearing (11-2) are both arranged in the inner peripheral surface of the quick-mounting sleeve (2), and the inner rings of the first bearing (11-1) and the second bearing (11-2) are both sleeved at the left part of the output shaft (6); a rear end cover (1-3) with a hollow interior is arranged in the inner cavity of the right end of the shell (1); the third bearing (11-3) is arranged on the inner peripheral surface of the rear end cover (1-3), and the inner ring of the third bearing (11-3) is sleeved on the right part of the output shaft (6); the rotor turning assembly (12) comprises a fourth bearing (12-1) and a fifth bearing (12-2); the shell (1) is provided with a middle spacer block with a hollow inside on the inner peripheral surface between the motor stator (3) and the speed reducing mechanism (5); the fourth bearing (12-1) is arranged on the inner peripheral surface of the middle spacer block, and the inner ring is sleeved on the left end of the motor rotor (4); the fifth bearing (12-2) is arranged on the inner peripheral surface of the rear end cover (1-3), and the inner ring is sleeved on the right part of the motor rotor (4); the quick dismounting mechanism (8) comprises a front nut (8-1), a spring (8-2), a ball pressing sleeve (8-3) and a steel ball (8-4); the right part of the front nut (8-1) is in threaded connection with the outer wall of the quick-mounting sleeve (2), and a gap is arranged between the left part and the quick-mounting sleeve (2); the bead pressing sleeve (8-3) is connected with the outer wall of the quick-mounting sleeve (2) at the left side of the front nut (8-1) in a sliding manner; the spring (8-2) is sleeved on the outer wall between the quick-mounting sleeve (2) and the front nut (8-1); through holes (2-1) are uniformly distributed in the fast-assembling sleeve (2) along the axial direction; the steel balls (8-4) are arranged in the through holes (2-1), and the ball pressing sleeve (8-3) pushes the steel balls (8-4) to enable the steel balls (8-4) to clamp the chuck mechanism (7); the chuck mechanism (7) comprises a chuck connecting sleeve (7-1), a chuck connecting rod (7-2) and a chuck (7-3); the chuck connecting sleeve (7-1) stretches into the inner cavity of the quick-mounting sleeve (2), and a hemispherical groove (7-1-1) matched with the steel ball (8-4) is formed in the outer wall of the chuck connecting sleeve (7-1); a sixth bearing (7-1-2) is arranged in the inner cavity of the chuck connecting sleeve (7-1); the chuck connecting rod (7-2) is fixed with the inner ring of the sixth bearing (7-1-2), and two ends of the chuck connecting rod are respectively connected with the chuck (7-3) and the output shaft (6).
2. A medical hand held power drill according to claim 1, wherein: a gasket is arranged between the first-stage planet carrier (5-2) and the first-stage planet wheel (5-3) on a first rotating shaft (5-2-1) of the first-stage planet carrier (5-2) of the first-stage planet wheel speed reduction assembly; the first rotating shaft (5-2-1) is provided with a check ring for limiting the axial movement of the first-stage planet wheel (5-3).
3. A medical hand held power drill according to claim 2, wherein: a gasket is arranged between the second-stage planet carrier (5-4) and the second-stage planet (5-5) on a second rotating shaft (5-4-1) of the second-stage planet carrier (5-4) of the second-stage planet reduction assembly; and a check ring for limiting the axial movement of the second-stage planetary gear (5-5) is arranged on the second rotating shaft (5-4-1).
4. A medical hand held power drill according to claim 1, wherein: also comprises a battery box (13); the battery box (13) is arranged on the bottom of the handle (1-1) of the casing (1); the battery (13-1) of the battery box (13) supplies power for the motor driving plate (10); the speed regulating assembly (9) and the motor stator (3) are electrically connected with the motor driving plate (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711429898.4A CN107947455B (en) | 2017-12-25 | 2017-12-25 | Medical hand-held electric drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711429898.4A CN107947455B (en) | 2017-12-25 | 2017-12-25 | Medical hand-held electric drill |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107947455A CN107947455A (en) | 2018-04-20 |
| CN107947455B true CN107947455B (en) | 2023-12-15 |
Family
ID=61940261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711429898.4A Active CN107947455B (en) | 2017-12-25 | 2017-12-25 | Medical hand-held electric drill |
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| CN110742673B (en) * | 2018-07-24 | 2021-03-16 | 上海库欣医疗科技有限公司 | Electric bone drill |
| CN112315538A (en) * | 2020-10-05 | 2021-02-05 | 德清创赢机械科技有限公司 | Small medical bone saw |
| CN112701849B (en) * | 2020-12-21 | 2022-09-27 | 宁波智启机电有限公司 | Multistage split type tubular motor reducer |
| CN115363687B (en) * | 2022-09-05 | 2024-01-09 | 诺鑫（南通）医疗技术有限公司 | Bone drill device with depth measurement function |
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| CN201619095U (en) * | 2010-01-21 | 2010-11-03 | 浙江海王电器有限公司 | Quick clamping device for electric hammer |
| CN202684866U (en) * | 2012-07-05 | 2013-01-23 | 铁鎯电动工具有限公司 | Quick-change chuck |
| CN104607695A (en) * | 2014-11-28 | 2015-05-13 | 浙江明磊工具实业有限公司 | Transmission device of electric drill |
| CN206028803U (en) * | 2016-10-10 | 2017-03-22 | 浙江博大实业有限公司 | Hand -held type double reduction electric drill |
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| JP5783895B2 (en) * | 2011-12-22 | 2015-09-24 | 株式会社マキタ | Power tools |
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|---|---|---|---|---|
| CN201619095U (en) * | 2010-01-21 | 2010-11-03 | 浙江海王电器有限公司 | Quick clamping device for electric hammer |
| CN202684866U (en) * | 2012-07-05 | 2013-01-23 | 铁鎯电动工具有限公司 | Quick-change chuck |
| CN104607695A (en) * | 2014-11-28 | 2015-05-13 | 浙江明磊工具实业有限公司 | Transmission device of electric drill |
| CN206028803U (en) * | 2016-10-10 | 2017-03-22 | 浙江博大实业有限公司 | Hand -held type double reduction electric drill |
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