Anti-vibration stable handle operation milling cutter

Abstract

The invention discloses an anti-vibration stable handle operation milling cutter, and belongs to the technical field of medical instruments, the anti-vibration stable handle operation milling cutter comprises two symmetrically arranged outer shells, the two outer shells are fixedly connected through two symmetrically arranged connecting rods, a mounting ring groove is formed between the two fixedly connected outer shells, and an annular support frame is arranged in the mounting ring groove; a handheld handle is fixedly connected to the bottom end of the annular supporting frame, a controller is fixedly connected to the outer wall of the operation side of the handheld handle, a mounting shell is rotationally connected to the interior of the side wall, away from the other side, of the outer shell on one side through a bearing, and a rotation driving mechanism is assembled between the mounting shell and the adjacent outer shell. The two first milling cutter heads and the second milling cutter head are arranged, the two first milling cutter heads are combined into a drill bit, the second milling cutter head is arranged in the two first milling cutter heads, meanwhile, the two first milling cutter heads can rotate and extend outwards, switching operation of the first milling cutter heads and the second milling cutter head can be achieved through simple operation, time and labor are saved, and convenience is improved.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, specifically relating to a shock-resistant and stabilized surgical milling cutter. Background Technology

[0002] Surgical milling cutters are high-precision cutting instruments that use a cutting head to precisely mill, grind, or shape human tissues (such as bones and soft tissues) to achieve surgical purposes such as removing diseased tissues, reshaping anatomical structures, and creating surgical pathways. They are widely used in multiple specialties such as neurosurgery, orthopedics, and oral and maxillofacial surgery.

[0003] Current surgical end mills are designed with replaceable cutter heads to improve adaptability, specifically through a detachable connection structure. However, this design has the following problems: The process requires disassembling the milling cutter head and then installing a replacement milling cutter head before operation can be carried out. This process is complicated, cumbersome, time-consuming, and labor-intensive, reducing convenience.

[0004] In view of this, a shock-resistant and stable handle surgical milling cutter was designed to solve the above problems. Summary of the Invention

[0005] To address the problems mentioned in the background section, this invention provides a tremor-resistant, stabilized-handle surgical end mill that allows for simple switching between a first and second end mill head, saving time and effort and improving convenience.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a shock-resistant and stable handle surgical milling cutter, comprising two symmetrically arranged outer shells, which are fixedly connected by two symmetrically arranged connecting rods, forming a mounting annular groove between the two shells in the fixed state. An annular support frame is provided inside the mounting annular groove, and a hand handle is fixedly connected to the bottom end of the annular support frame. A controller is fixedly connected to the outer wall of the operating side of the hand handle. A mounting housing is rotatably connected to the inner side wall of one shell away from the other shell via a bearing. A rotary drive mechanism is assembled between the mounting housing and the adjacent shell. A second milling cutter head is fixedly connected to the middle of the side wall of the mounting housing away from the adjacent shell. Two first milling cutter heads are symmetrically arranged along the central axis of the second milling cutter head on the side wall of the mounting housing away from the adjacent shell. A rotary drive mechanism is assembled between the two first milling cutter heads and the mounting housing. The two first milling cutter heads have receiving grooves on their side walls close to each other. The two receiving grooves merge and enclose the second milling cutter head. The rotary drive mechanism is electrically connected to the controller.

[0007] Furthermore, the rotary drive mechanism includes a mounting bracket fixed to the inner wall of the outer shell near the mounting housing side and an external gear ring fixedly sleeved on the outer wall of the mounting housing near the adjacent outer shell side. A motor is fixedly connected inside the mounting bracket, and a first gear is fixedly sleeved at the output end of the motor. The first gear meshes with the external gear ring, and the motor is electrically connected to the controller.

[0008] Furthermore, the rotation drive mechanism includes two symmetrically arranged rotating slots in the middle of the mounting housing, a drive cavity located inside the mounting housing on one side of the two rotating slots, and a rotating block fixed to the first milling cutter head near the side wall of the mounting housing. The two rotating blocks extend into the two rotating slots respectively. A follower shaft is fixedly connected inside the rotating block. One end of the follower shaft is connected to the inner wall of the mounting housing through a bearing, and the other end extends through the mounting housing into the drive cavity. The follower shaft is connected to the through section of the mounting housing through a bearing. A follower spool is fixedly connected to the end wall of the follower shaft extending into the drive cavity. A coil spring is sleeved on the section of the follower shaft extending into the drive cavity. Both ends of the coil spring are fixedly connected to the side walls of the drive cavity and the follower spool respectively. A drive shaft is arranged inside the drive cavity away from the two follower shafts. A drive rotation mechanism is assembled between the two drive shafts and the mounting housing. A drive spool is fixedly sleeved on the other end of the drive shaft. A connecting wire is wound between the adjacent follower spool and the drive spool.

[0009] Furthermore, the drive rotation mechanism includes two mounting seats symmetrically fixed to the top of the mounting housing, a through groove opened at the top of the mounting housing between the two mounting seats, and a second gear fixedly sleeved on the two drive shafts below the drive spool. A screw with a handle is provided between the two mounting seats. The two ends of the screw with a handle extend through the adjacent mounting seats to the other side and are connected to the through section of the mounting seat through bearings. A movable seat is connected to the screw with a handle between the two mounting seats through a transmission nut. The bottom end of the movable seat extends through the through groove into the drive cavity and is fixedly connected to a follower block. Two racks are symmetrically fixed to the side wall of the follower block, and the two racks are respectively meshed with the two second gears.

[0010] Furthermore, the screw with handle extends through the adjacent outer shell from the end away from the handle and is fixedly sleeved with a third gear inside. The screw with handle is connected to the through section of the outer shell through a bearing. The annular support frame is connected to the two outer shells through bearings. An internal gear ring is fixedly connected to the inner wall of the outer shell. The third gear meshes with the internal gear ring.

[0011] Furthermore, a shock-absorbing pad is fitted inside the mounting ring groove between the two outer shells and the annular support frame.

[0012] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention provides two first milling cutter heads and a second milling cutter head. The two first milling cutter heads are combined into a drill bit, and the second milling cutter head is built into the two first milling cutter heads. At the same time, the two first milling cutter heads can be rotated and extended outwards, enabling the switching operation between the first milling cutter head and the second milling cutter head through simple operation, saving time and effort and improving convenience.

[0013] 2. The handle of this invention has a rotatable structure and can switch the hand position according to the switching state of the first milling cutter head and the second milling cutter head, thereby improving convenience.

[0014] 3. The present invention provides shock-absorbing pads on both sides of the handle, which can reduce the transmission of vibration of the outer shell caused by the operation of the motor to the handle and improve anti-vibration stability. Attached Figure Description

[0015] Figure 1 This is a front view of the present invention; Figure 2 This is a top view of the present invention; Figure 3 For the present invention Figure 2 Cross section view; Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle; Figure 5 For the present invention Figure 4 Schematic diagram of a partial structure; Figure 6 For the present invention Figure 4 Schematic diagram of a partial structure; Figure 7 For the present invention Figure 2 Another perspective cross-sectional view; Figure 8 For the present invention Figure 7 Enlarged view at point B in the middle; Figure 9 For the present invention Figure 8 Schematic diagram of a partial structure; Figure 10 For the present invention Figure 2 Another perspective cross-sectional view; Figure 11 This is a cross-sectional view of another state of the present invention; In the diagram: 1. Annular support frame; 2. Mounting ring groove; 3. Controller; 4. Hand handle; 5. Outer shell; 6. Mounting housing; 7. First milling cutter head; 8. Connecting rod; 9. Receiving groove; 10. Second milling cutter head; 101. Motor; 102. External gear ring; 103. Mounting bracket; 104. First gear; 201. Follower spool; 202. Connecting wire; 203. Drive spool; 204. Drive shaft; 205. Drive cavity; 206. Follower shaft; 207. Coil spring; 208. Rotating groove; 209. Rotating block; 301. Mounting base; 302. Through slot; 303. Follower block; 304. Movable seat; 305. Screw with handle; 306. Rack; 307. Second gear; 401. Third gear; 402. Internal gear ring; 501. Shock-absorbing pad. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example 1

[0017] This invention provides the following technical solution: a shock-resistant and stable surgical milling cutter, comprising two symmetrically arranged outer shells 5, which are fixedly connected by two symmetrically arranged connecting rods 8. A mounting annular groove 2 is formed between the two fixedly connected outer shells 5. An annular support frame 1 is provided inside the mounting annular groove 2. A hand handle 4 is fixedly connected to the bottom end of the annular support frame 1. A controller 3 is fixedly connected to the outer wall of the operating side of the hand handle 4. A mounting housing 6 is rotatably connected to the inner side wall of one outer shell 5 away from the other outer shell 5 via a bearing. A rotary drive mechanism is assembled between the mounting housing 6 and the adjacent outer shell 5. A second milling cutter head 10 is fixedly connected to the middle of the side wall of the mounting housing 6 away from the adjacent outer shell 5. Two first milling cutter heads 7 are symmetrically arranged along the central axis of the second milling cutter head 10 on the side wall of the mounting housing 6 away from the adjacent outer shell 5. A rotary drive mechanism is assembled between the two first milling cutter heads 7 and the mounting housing 6. Receiving grooves 9 are respectively opened on the side walls of the two first milling cutter heads 7 close to each other. The two receiving grooves 9 merge and enclose the second milling cutter head 10. The rotary drive mechanism is electrically connected to the controller 3.

[0018] In this embodiment, please refer to the appendix. Figure 1 , 37. Select the surgical cutter state according to the surgical needs. If drilling is required, maintain the initial state, hold the handle 4, and start the rotary drive mechanism through the controller 3. The rotary drive mechanism drives the mounting housing 6 to rotate, and the mounting housing 6 drives the drill bit formed by the two merged first cutter heads 7 to rotate. The rotating drill bit cuts the bone to form a bone hole. If bone shaving is required, drive the two first cutter heads 7 to rotate outward through the rotary drive mechanism until they can no longer rotate and stop. At this time, the two first cutter heads 7 are in contact with the adjacent outer wall of the housing 5, and the second cutter head 10 is exposed. Hold the handle 4 and shave the bone through the second cutter head 10.

[0019] Specifically, the rotary drive mechanism includes a mounting bracket 103 fixedly connected to the inner wall of the outer shell 5 near the mounting housing 6 and an outer gear ring 102 fixedly sleeved on the outer wall of the mounting housing 6 near the adjacent outer shell 5. A motor 101 is fixedly connected inside the mounting bracket 103. A first gear 104 is fixedly sleeved at the output end of the motor 101. The first gear 104 meshes with the outer gear ring 102. The motor 101 is electrically connected to the controller 3.

[0020] In this embodiment, please refer to the appendix. Figure 3 , 4 5. The rotary drive mechanism controls the motor 101 to start through the controller 3. The motor 101 drives the output shaft to rotate, which in turn drives the first gear 104 to rotate. The first gear 104 drives the meshing external gear ring 102 to rotate, and the external gear ring 102 drives the mounting housing 6 to rotate, thereby realizing the rotation drive of the mounting housing 6.

[0021] Specifically, the rotation drive mechanism includes two symmetrically arranged rotating slots 208 in the middle of the mounting housing 6, a drive cavity 205 located inside the mounting housing 6 on one side of the two rotating slots 208, and a rotating block 209 fixedly connected to the first milling cutter head 7 near the side wall of the mounting housing 6. The two rotating blocks 209 extend into the two rotating slots 208 respectively. A follower shaft 206 is fixedly connected inside the rotating block 209. One end of the follower shaft 206 is connected to the inner wall of the mounting housing 6 through a bearing, and the other end extends through the mounting housing 6 into the drive cavity 205. The follower shaft 206 is connected to the mounting housing 6 through a bearing. The follower shaft 206 extends into the inner end wall of the drive cavity 205 and is fixedly connected to the follower spool 201. A coil spring 207 is sleeved on the section of the follower shaft 206 extending into the drive cavity 205. The two ends of the coil spring 207 are fixedly connected to the side walls of the drive cavity 205 and the follower spool 201, respectively. A drive shaft 204 is provided in the drive cavity 205 away from the two follower shafts 206. A drive rotation mechanism is assembled between the two drive shafts 204 and the mounting housing 6. A drive spool 203 is fixedly sleeved on the other end of the drive shaft 204. A connecting wire 202 is wound between the adjacent follower spool 201 and the drive spool 203.

[0022] In this embodiment, please refer to the appendix. Figure 7 and 8 The rotation drive mechanism drives two active shafts 204 to rotate in opposite directions through the drive rotation mechanism. The two active shafts 204 drive two active spools 203 to rotate in opposite directions. During the rotation of the two active spools 203 in opposite directions, two connecting lines 202 are wound up. The two connecting lines 202 drive two follower spools 201 to rotate in opposite directions. The two follower spools 201 drive two follower shafts 206 to rotate in opposite directions. During the rotation of the two follower shafts 206 in opposite directions, two rotating blocks 209 are driven to rotate in opposite directions. The two rotating blocks 209 drive two first milling cutter heads 7 to rotate in opposite directions. During the rotation of the two first milling cutter heads 7 in opposite directions, they extend outward until they can no longer rotate and stop. At this time, the two first milling cutter heads 7 are in contact with the adjacent outer wall of the outer shell 5, realizing the drive of the two first milling cutter heads 7 to rotate outward.

[0023] Specifically, the drive rotation mechanism includes two mounting seats 301 symmetrically fixed to the top of the mounting housing 6, a through groove 302 opened at the top of the mounting housing 6 between the two mounting seats 301, and a second gear 307 fixedly sleeved on the two drive shafts 204 below the drive spool 203. A screw with a handle 305 is provided between the two mounting seats 301. The two ends of the screw with a handle 305 extend through the adjacent mounting seats 301 to the other side and are connected to the through section of the mounting seat 301 through bearings. A movable seat 304 is connected to the screw with a handle 305 between the two mounting seats 301 through a transmission nut. The bottom end of the movable seat 304 extends through the through groove 302 into the drive cavity 205 and is fixedly connected to a follower block 303. Two racks 306 are symmetrically fixed to the side wall of the follower block 303. The two racks 306 are respectively meshed with the two second gears 307.

[0024] In this embodiment, please refer to the appendix. Figure 3 , 4 8. The drive rotation mechanism drives the screw 305 with a handle to rotate via the handle of the screw 305 with a handle. During the rotation of the screw 305 with a handle, the movable seat 304 moves on the screw 305 with a handle towards the second gear 307. The movable seat 304 drives the follower block 303 to move in the same direction. The follower block 303 drives the two racks 306 to move in the same direction. During the movement of the two racks 306, they drive the two meshing second gears 307 to rotate in opposite directions. The two second gears 307 drive the two drive shafts 204 to rotate in opposite directions, thereby realizing the drive of the two drive shafts 204 to rotate in opposite directions. Example 2

[0025] The difference between this embodiment and Embodiment 1 is that: Specifically, the screw 305 with a handle extends through the adjacent outer shell 5 from the end away from the handle and is fixedly sleeved with a third gear 401. The screw 305 with a handle is connected to the through section of the outer shell 5 through a bearing. The annular support frame 1 is connected to the two outer shells 5 through bearings. An internal gear ring 402 is fixedly connected to the inner wall of the outer shell 5. The third gear 401 is meshed with the internal gear ring 402.

[0026] In this embodiment, please refer to the appendix. Figure 3 and 4 During the rotation of the screw 305 with handle, the third gear 401 is driven to rotate. The third gear 401 drives the meshing internal gear ring 402 to rotate. The internal gear ring 402 drives the ring support frame 1 to rotate. The ring support frame 1 drives the hand handle 4 to rotate until it can no longer rotate and stops. At this time, the hand handle 4 is in the appropriate position for the operation of the second milling head 10. Example 3

[0027] The difference between this embodiment and embodiment two is that: Specifically, a shock-absorbing pad 501 is fitted inside the mounting groove 2 between the two outer shells 5 and the annular support frame 1.

[0028] In this embodiment, please refer to the appendix. Figure 2 The shock-absorbing pad 501 can reduce the vibration of the motor 101 transmitted to the handle 4, thereby improving the stability of holding the handle 4.

[0029] Working principle of the invention: Select the surgical milling cutter status according to the surgical needs; If drilling is required for the surgery, maintain the initial state, hold the handle 4, and start the motor 101 through the controller 3. The motor 101 drives the output shaft to rotate, which drives the first gear 104 to rotate. The first gear 104 drives the meshing external gear ring 102 to rotate. The external gear ring 102 drives the mounting housing 6 to rotate. The mounting housing 6 drives the drill bit formed by the two combined first milling cutter heads 7 to rotate. The rotating drill bit cuts the bone to form a bone hole. If bone shaving is required during surgery, the handle of the screw 305 with handle is used to rotate the screw 305. During the rotation of the screw 305 with handle, the movable seat 304 moves on the screw 305 towards the second gear 307. The movable seat 304 drives the follower block 303 to move in the same direction. The follower block 303 drives the two racks 306 to move in the same direction. During the movement of the two racks 306, the two meshing second gears 307 rotate in opposite directions. The two second gears 307 drive the two drive shafts 204 to rotate in opposite directions. The two drive shafts 204 drive the two drive spools 203 to rotate in opposite directions. During the rotation of the two drive spools 203 in opposite directions, the two connecting wires 202 are wound up. The two connecting wires 202 drive the two follower spools 201 to rotate in opposite directions. The cylinder 201 drives two follower shafts 206 to rotate in opposite directions. During the rotation of the two follower shafts 206, the two rotating blocks 209 rotate in opposite directions. The two rotating blocks 209 drive two first milling cutter heads 7 to rotate in opposite directions. During the rotation of the two first milling cutter heads 7, they extend outward. At the same time, the screw with handle 305 rotates, driving the third gear 401 to rotate. The third gear 401 drives the meshing internal gear ring 402 to rotate. The internal gear ring 402 drives the annular support frame 1 to rotate. The annular support frame 1 drives the hand handle 4 to rotate until it can no longer rotate and stops. At this time, the two first milling cutter heads 7 are in contact with the adjacent outer wall of the outer shell 5, the second milling cutter head 10 is exposed, and the hand handle 4 is located in the appropriate position for operating the second milling cutter head 10. Holding the hand handle 4, the bone is cut by the second milling cutter head 10. The shock-absorbing pad 501 can reduce the vibration of the motor 101 transmitted to the handle 4, thereby improving the stability of holding the handle 4.

[0030] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A surgical end mill with a vibration-stabilizing handle, characterized in that, The system includes two symmetrically arranged outer shells (5), which are fixedly connected by two symmetrically arranged connecting rods (8). A mounting annular groove (2) is formed between the two fixedly arranged outer shells (5). An annular support frame (1) is provided inside the mounting annular groove (2). A hand handle (4) is fixedly connected to the bottom end of the annular support frame (1). A controller (3) is fixedly connected to the outer wall of the operating side of the hand handle (4). A mounting housing (6) is rotatably connected to the inner side wall of one outer shell (5) away from the other outer shell (5) through a bearing. The mounting housing (6) is connected to the adjacent outer shell (5). A rotary drive mechanism is installed between the mounting housing (6) and the mounting housing (6). A second milling cutter head (10) is fixedly connected to the middle of the side wall away from the adjacent outer shell (5). Two first milling cutter heads (7) are symmetrically arranged on the side wall away from the adjacent outer shell (5) along the central axis of the second milling cutter head (10). A rotary drive mechanism is installed between the two first milling cutter heads (7) and the mounting housing (6). The two first milling cutter heads (7) are close to each other and have receiving grooves (9) on their side walls. The two receiving grooves (9) are combined to wrap around the second milling cutter head (10). The rotary drive mechanism is electrically connected to the controller (3).

2. The anti-vibration stabilizing handle surgical milling cutter according to claim 1, characterized in that: The rotary drive mechanism includes a mounting bracket (103) fixedly attached to the inner wall of the outer shell (5) near the mounting housing (6) and an external gear ring (102) fixedly sleeved on the outer wall of the mounting housing (6) near the adjacent outer shell (5). A motor (101) is fixedly attached inside the mounting bracket (103). A first gear (104) is fixedly sleeved at the output end of the motor (101). The first gear (104) meshes with the external gear ring (102). The motor (101) is electrically connected to the controller (3).

3. The anti-vibration stabilizing handle surgical milling cutter according to claim 2, characterized in that: The rotation drive mechanism includes two symmetrically arranged rotating slots (208) in the middle of the mounting housing (6), a drive cavity (205) located inside the mounting housing (6) on one side of the two rotating slots (208), and a rotating block (209) fixed to the first milling cutter head (7) near the side wall of the mounting housing (6). The two rotating blocks (209) extend into the two rotating slots (208), respectively. A follower shaft (206) is fixed inside the rotating block (209). One end of the follower shaft (206) is connected to the inner wall of the mounting housing (6) through a bearing, and the other end extends through the mounting housing (6) into the drive cavity (205). The follower shaft (206) is connected to the through section of the mounting housing (6) through a bearing. The follower shaft (206) extends into the inner end wall of the drive cavity (205) and is fixedly connected to the follower spool (201). The section of the follower shaft (206) extending into the drive cavity (205) is fitted with a coil spring (207). The two ends of the coil spring (207) are fixedly connected to the side walls of the drive cavity (205) and the follower spool (201), respectively. The drive cavity (205) is provided with a drive shaft (204) on the side away from the two follower shafts (206). The two drive shafts (204) are fitted with a drive rotation mechanism between the two drive shafts (204) and the mounting housing (6). The other end of the drive shaft (204) is fixedly fitted with a drive spool (203). A connecting wire (202) is wound between the follower spool (201) and the drive spool (203).

4. The anti-vibration stabilizing handle surgical milling cutter according to claim 3, characterized in that: The drive rotation mechanism includes two mounting seats (301) symmetrically fixed to the top of the mounting housing (6), a through groove (302) opened at the top of the mounting housing (6) between the two mounting seats (301), and a second gear (307) fixedly sleeved on the two drive shafts (204) below the drive spool (203). A screw with a handle (305) is provided between the two mounting seats (301), and the two ends of the screw with a handle (305) extend through the adjacent mounting seat (301) to the other. On one side, the screw with handle (305) is connected to the mounting base (301) through a bearing. A movable seat (304) is connected between the two mounting bases (301) via a transmission nut. The bottom end of the movable seat (304) extends through the through groove (302) to the inside of the drive cavity (205) and is fixedly connected to a follower block (303). Two racks (306) are symmetrically fixed to the side wall of the follower block (303). The two racks (306) are respectively meshed with two second gears (307).

5. A surgical end mill with a vibration-stabilized handle according to claim 4, characterized in that: The screw with handle (305) extends through the adjacent outer shell (5) away from the handle end and is fixedly sleeved with a third gear (401). The screw with handle (305) is connected to the through section of the outer shell (5) through a bearing. The annular support frame (1) is connected to the two outer shells (5) through a bearing. An internal gear ring (402) is fixedly connected to the inner wall of the outer shell (5). The third gear (401) meshes with the internal gear ring (402).

6. A surgical end mill with a vibration-stabilized handle according to claim 5, characterized in that: The mounting groove (2) is fitted with a shock-absorbing pad (501) between the two outer shells (5) and the annular support frame (1).

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