Orthopedic drilling guider

Abstract

The invention discloses an orthopedic drilling guider, and relates to the technical field of orthopedics, the orthopedic drilling guider comprises a support underframe mechanism, and the support underframe mechanism comprises a bottom ring; the adjusting mechanism comprises a first worm gear, the first worm gear is rotationally installed on the upper side of the bottom ring, protractors are arranged on the front portion and the rear portion of the upper side of the first worm gear, and rotating shafts are rotationally installed at the center circle points of the two protractors; and the guide mechanism comprises a bottom cylinder, the two symmetrical sides of the bottom cylinder are connected with the two rotating shafts correspondingly, and the bottom cylinder is in threaded connection with a guide cylinder. The rolling balls are movably embedded in the inner wall of the guide channel of the guide cylinder, friction between the guide cylinder and a drill bit is reduced, abrasion to the inner wall of the guide channel when the drill bit rotates and moves is reduced, and the guide cylinder and the bottom cylinder are convenient and fast to disassemble and assemble; and the guide cylinder driving the guide channel of the corresponding specification can be replaced, which is very convenient.

Description

Technical Field

[0001] The invention relates to the technical field of orthopedics, and in particular to an orthopedic drilling guide. Background Art

[0002] Orthopedics is one of the most common departments in major hospitals. It mainly studies the anatomy, physiology and pathology of the musculoskeletal system, and uses drugs, surgery and physical methods to maintain and develop the normal form and function of this system. Orthopedic surgery usually repairs the bone in the fractured area of ​​the patient. The surgical process generally requires drilling in the fractured bone area. In order to ensure the accuracy of drilling, a guide is required to assist. Its main function is to locate before drilling and guide the drill bit during drilling.

[0003] At present, in the existing guides for orthopedic drilling, the guide sleeve is an important component. The inner wall of the guide sleeve is in contact with the drill bit. When the drill bit rotates and moves at high speed, friction occurs between the drill bit and the inner wall of the guide sleeve, which easily causes wear on the inner wall of the guide sleeve and affects its service life. In addition, it is extremely inconvenient to disassemble and replace the guide sleeve. When using drill bits of different specifications to drill holes in the bone area, the entire drilling guide needs to be replaced, which is cumbersome and inconvenient. Summary of the invention

[0004] The object of the present invention is to provide an orthopedic drilling guide to solve the problems raised in the above background technology.

[0005] In order to achieve the above object, the present invention provides the following technical solution: an orthopedic drilling guide, comprising:

[0006] A supporting chassis mechanism, the supporting chassis mechanism comprising a bottom ring, a first worm being rotatably mounted on a front side of the bottom ring;

[0007] The adjusting mechanism comprises a first worm gear, the first worm gear is rotatably mounted on the upper side of the bottom ring, the first worm gear is drivingly connected to the first worm, a through hole is provided in the middle of the first worm gear, protractors are provided at the front and rear parts of the upper side of the first worm gear, a rotating shaft is rotatably mounted at the center points of the two protractors, one end of the rotating shaft close to the protractor passes through the protractor and is connected to a pointer, and a driving component for driving the two rotating shafts to rotate synchronously is provided on the first worm gear;

[0008] The guide mechanism comprises a bottom cylinder, the two symmetrical sides of the bottom cylinder are respectively connected to the two rotating shafts, the bottom cylinder is threadedly connected with a guide cylinder, a locking assembly is arranged on the guide cylinder, and the inner cavity wall of the guide cylinder is movably inlaid with balls at equal intervals.

[0009] Preferably, the bottom cylinder comprises a first cylinder body, a threaded channel is provided on the first cylinder body, four support plates are fixed at equal intervals on the top of the outer side of the first cylinder body, and a positioning column is fixed on the upper end of the support plate;

[0010] The guide cylinder includes a second cylinder body, the bottom of which is connected with a threaded portion, the threaded portion is threadedly embedded in a threaded channel, the second cylinder body is provided with a guide channel, the bottom end of the guide channel extends to the bottom end of the threaded portion, the ball is movably embedded in the inner wall of the guide channel, the threaded portion at the bottom of the guide cylinder is threadedly connected with the threaded channel on the bottom cylinder, the connection is simple, the ball on the inner cavity wall of the guide cylinder contacts the drill bit, the ball can rotate, and the wear on the inner cavity wall of the guide cylinder caused by the drill bit rotating and moving is reduced.

[0011] Preferably, the locking assembly includes a moving ring slidably sleeved on the second cylinder, and four handles are fixed on the side wall of the moving ring at equal intervals. Limit holes are provided on the four handles, and the limit holes match the positioning columns. A locking knob is threadedly embedded on the side of the handle away from the moving ring. After the threaded portion of the bottom of the guide cylinder is threadedly embedded in the threaded channel, the moving ring is moved downward so that the limit holes on the four handles are respectively sleeved on the four positioning columns on the bottom cylinder, and then the locking knob is tightened so that the tail end of the locking knob conflicts with the side wall of the positioning column, thereby making the connection between the guide cylinder and the bottom cylinder firm and stable, and the connection is simple and convenient, and it is also convenient to disassemble and separate.

[0012] Preferably, vertical slide grooves are provided on the four sides of the second cylinder, and sliders are provided on the inner wall of the movable ring at positions corresponding to the vertical slide grooves. The sliders are slidably nested in the corresponding vertical slide grooves, so that the movable ring can slide up and down stably, and the movable ring will not detach from the second cylinder, so that the movable ring can be stably installed on the second cylinder.

[0013] Preferably, the driving assembly includes two second worm wheels, two second worms and a transmission rod, the two second worm wheels are respectively fixedly sleeved on the two rotating shafts, the two second worms are respectively located on the upper sides of the two second worm wheels, the second worms are transmission-connected to the second worm wheels, the right ends of the two second worms are both fixedly connected to the first bevel gear, the transmission rod is located between the two first bevel gears, both ends of the transmission rod are fixedly connected to the second bevel gear, the second bevel gear is meshingly connected to the first bevel gear, and the middle part of the transmission rod is fixedly sleeved with a rotating head;

[0014] By rotating the rotating head, the transmission rod is driven to rotate. The rotation of the transmission rod drives the two second worm gears to rotate synchronously through the meshing between the second bevel gear and the first bevel gear. The two second worm gears rotate synchronously to transmit the second worm gear corresponding to the bottom, thereby driving the two rotating shafts to rotate synchronously, thereby driving the guide mechanism to rotate in the vertical plane, and adjusting the inclination angle of the guide mechanism in the vertical plane.

[0015] Preferably, the left and right parts of the second worm are rotatably sleeved with a third bracket, the third bracket is fixed on the protractor, the front and rear ends of the transmission rod are rotatably sleeved with a second bracket, the second bracket is fixed on the first worm wheel, the transmission rod is stably installed and rotated by the two second brackets, and the second worm is stably installed and rotated by the two third brackets.

[0016] Preferably, first brackets are fixed to the left and right parts of the front side of the bottom ring, the first worm is rotatably connected to the two first brackets, the left end of the first worm is connected to a swivel head, the arrangement of the two first brackets allows the first worm to be stably installed, the first worm can be conveniently rotated by the swivel head, the rotation of the first worm and the first worm wheel drive the first worm wheel to rotate, thereby causing the adjustment mechanism and the guide mechanism to rotate.

[0017] Preferably, side plates are fixed on the left and right sides of the bottom ring, a support plate is fixed on the lower edge of the side plate, a screw rod is threaded through the support plate, an extrusion block is rotatably connected to the inner wall of the screw rod, and a mounting seat is fixed to the bottom of the support plate, and the extrusion block is pushed to support the patient's arms or legs by rotating the screw rod, thereby improving the stability of the device when placed on the bed.

[0018] Preferably, an arc-shaped slide rail is provided on the upper side of the bottom ring, and a plurality of slide seats are provided at equal intervals at the bottom of the first worm gear. The slide seat is installed on the arc-shaped slide rail, so that the first worm gear can rotate on the bottom ring, and the installation and rotation are stable.

[0019] In the above technical solution, the technical effects and advantages provided by the present invention are:

[0020] 1. The guide mechanism is composed of a bottom cylinder and a guide cylinder. The guide cylinder guides the drill bit. The inner wall of the guide channel of the guide cylinder is movably inlaid with balls at equal intervals. The balls can rotate to reduce the friction between the drill bit and the inner wall of the guide channel caused by the rotation and movement of the drill bit, thereby increasing the service life of the guide cylinder. At the same time, the installation between the guide cylinder and the bottom cylinder is simple and quick, and the disassembly is convenient. When using drill bits of different specifications to drill holes in the backbone, the guide cylinder that drives the guide channel of the corresponding specifications can be replaced, which is very convenient;

[0021] 2. By providing a first worm gear and an adjusting mechanism, rotating the first worm gear can drive the adjusting mechanism to rotate horizontally as a whole, thereby adjusting the water level angle of the guide mechanism. Rotating the rotating head on the adjusting mechanism can drive the guide mechanism to rotate in the vertical plane, and adjust the inclination angle of the guide mechanism in the vertical plane. The adjustment is simple and convenient, and the drill bit is effectively guided, thereby improving the drilling accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the supporting frame structure of the present invention;

[0025] Figure 3 It is a schematic diagram of the structure of the regulating mechanism of the present invention;

[0026] Figure 4 It is a schematic diagram of the structure of the guide mechanism of the present invention;

[0027] Figure 5 It is a schematic diagram of the bottom tube structure of the present invention;

[0028] Figure 6 It is a schematic diagram of the guide tube structure of the present invention;

[0029] Figure 7 It is a schematic diagram of the connection between the moving ring and the handle of the present invention.

[0030] Description of reference numerals:

[0031] 10. Supporting chassis mechanism; 11. Bottom ring; 111. First bracket; 12. First worm; 121. Rotary head; 13. Side plate; 14. Support plate; 15. Screw; 16. Extrusion block; 17. Mounting seat;

[0032] 20. Adjustment mechanism; 21. First worm gear; 211. Through hole; 212. Second bracket; 22. Protractor; 221. Third bracket; 23. Rotation axis; 231. Pointer; 24. Second worm gear; 25. Second worm; 26. Transmission rod; 27. First bevel gear; 28. Second bevel gear; 29. ​​Rotation head;

[0033] 30. Guide mechanism; 31. Bottom cylinder; 311. First cylinder; 312. Threaded channel; 313. Support plate; 314. Positioning column; 32. Guide cylinder; 321. Second cylinder; 3211. Vertical slide groove; 322. Threaded portion; 323. Guide channel; 324. Ball bearing; 325. Moving ring; 3251. Slider; 326. Handle; 3261. Limiting hole; 327. Locking knob. DETAILED DESCRIPTION

[0034] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0035] The present invention provides Figures 1 to 3 An orthopedic drilling guide is shown, comprising:

[0036] A supporting frame mechanism 10, the supporting frame mechanism 10 comprises a bottom ring 11, a first worm 12 is rotatably mounted on the front side of the bottom ring 11;

[0037] The adjusting mechanism 20 includes a first worm gear 21, which is rotatably mounted on the upper side of the bottom ring 11. The first worm gear 21 is connected to the first worm 12 by transmission. A through hole 211 is provided in the middle of the first worm gear 21. Protractors 22 are provided at the front and rear parts of the upper side of the first worm gear 21. Rotating shafts 23 are rotatably mounted at the center points of the two protractors 22. One end of the rotating shaft 23 close to the protractor 22 passes through the protractor 22 and is connected to a pointer 231. A driving component for driving the two rotating shafts 23 to rotate synchronously is provided on the first worm gear 21.

[0038] The guide mechanism 30 includes a bottom cylinder 31 , and two symmetrical sides of the bottom cylinder 31 are respectively connected to the two rotating shafts 23 , and a guide cylinder 32 is threadedly connected to the bottom cylinder 31 .

[0039] The driving assembly includes two second worm gears 24, two second worm screws 25 and a transmission rod 26. The two second worm gears 24 are respectively fixedly sleeved on the two rotating shafts 23. The two second worm screws 25 are respectively located on the upper sides of the two second worm gears 24. The second worm screws 25 are transmission-connected with the second worm gears 24. The right ends of the two second worm screws 25 are both fixedly connected with the first bevel gears 27. The transmission rod 26 is located between the two first bevel gears 27. Both ends of the transmission rod 26 are fixedly connected with the second bevel gears 28. The second bevel gears 28 are meshingly connected with the first bevel gears 27. The middle part of the transmission rod 26 is fixedly sleeved with a rotating head 29.

[0040] By rotating the rotating head 29, the transmission rod 26 is driven to rotate. The rotation of the transmission rod 26 drives the two second worm gears 25 to rotate synchronously through the meshing between the second bevel gear 28 and the first bevel gear 27. The two second worm gears 25 rotate synchronously to transmit the second worm gear 24 corresponding to the bottom, thereby driving the two rotating shafts 23 to rotate synchronously, thereby driving the guide mechanism 30 to rotate in the vertical plane, and adjusting the inclination angle of the guide mechanism 30 in the vertical plane.

[0041] The left and right parts of the second worm 25 are both rotatably sleeved with the third bracket 221, and the third bracket 221 is fixed on the protractor 22. The front and rear ends of the transmission rod 26 are both rotatably sleeved with the second bracket 212, and the second bracket 212 is fixed on the first worm wheel 21. The two second brackets 212 ensure that the transmission rod 26 is stably installed and rotated, and the two third brackets 221 ensure that the second worm 25 is stably installed and rotated.

[0042] The first brackets 111 are fixed to the left and right parts of the front side of the bottom ring 11, the first worm 12 is rotatably connected to the two first brackets 111, the left end of the first worm 12 is connected to a swivel head 121, the arrangement of the two first brackets 111 allows the first worm 12 to be stably installed, and the first worm 12 can be easily rotated through the swivel head 121. The rotation of the first worm 12 and the transmission of the first worm wheel 21 drive the first worm wheel 21 to rotate, thereby rotating the adjustment mechanism 20 and the guide mechanism 30.

[0043] Side plates 13 are fixed on both sides of the bottom ring 11, and a support plate 14 is fixed to the lower edge of the side plate 13. A screw rod 15 is threadedly penetrated on the support plate 14, and an extrusion block 16 is rotatably connected to the inner wall of the screw rod 15. A mounting seat 17 is fixed to the bottom of the support plate 14. By rotating the screw rod 15, the extrusion block 16 is pushed to support the patient's arms or legs, thereby improving the stability of the device placed on the bed.

[0044] An arc-shaped slide rail is provided on the upper side of the bottom ring 11, and a plurality of slide seats are provided at equal intervals at the bottom of the first worm gear 21, which is slidably installed on the arc-shaped slide rail, so that the first worm gear 21 can rotate on the bottom ring 11, and the installation and rotation are stable.

[0045] In the present invention, the bottom ring 11 and the center of the first worm gear 21 of the orthopedic drilling guide are aligned with the position where the hole needs to be drilled, and the screws 15 on both sides of the supporting frame mechanism 10 are rotated at the same time, so that the screws 15 push the extrusion blocks 16 to support the patient's arms or legs, and the mounting seat 17 on the supporting frame mechanism 10 is connected to the bed or other supporting mechanism. When adjusting, the rotating head 29 on the adjusting mechanism 20 is rotated first to drive the transmission rod 26 to rotate, and the rotation of the transmission rod 26 drives the two second worm gears 25 to rotate synchronously through the meshing between the second bevel gear 28 and the first bevel gear 27. The two second worm gears 25 rotate synchronously with the second worm wheel 24 corresponding to the bottom thereof, thereby driving the two rotating shafts 23 to rotate synchronously, thereby driving the guide mechanism 30 to rotate in the vertical plane, adjusting the inclination angle of the guide mechanism 30 in the vertical plane, and then rotating the first worm gear 12 on the supporting frame mechanism 10, the first worm gear 12 and the first worm wheel 21 on the adjusting mechanism 20 drive the adjusting mechanism 20 to rotate horizontally as a whole, thereby adjusting the water level angle of the guide mechanism 30, the adjustment is simple and convenient, the drill bit is effectively guided, and the drilling accuracy is improved.

[0046] like Figure 1 and Figures 4 to 7 As shown, a locking assembly is provided on the guide cylinder 32, and balls 324 are movably embedded in the inner cavity wall of the guide cylinder 32 at equal intervals.

[0047] The bottom cylinder 31 includes a first cylinder body 311, a threaded passage 312 is formed on the first cylinder body 311, four support plates 313 are fixed at equal intervals on the top of the outer side of the first cylinder body 311, and a positioning column 314 is fixed on the upper end of the support plate 313;

[0048] The guide cylinder 32 includes a second cylinder body 321, and the bottom of the second cylinder body 321 is connected with a threaded portion 322, and the threaded portion 322 is threadedly embedded in the threaded channel 312. A guide channel 323 is opened on the second cylinder body 321, and the bottom end of the guide channel 323 extends to the bottom end of the threaded portion 322. The ball 324 is movably embedded in the inner wall of the guide channel 323. The threaded portion 322 at the bottom of the guide cylinder 32 is threadedly connected with the threaded channel 312 on the bottom cylinder 31, and the connection is simple. The ball 324 on the inner cavity wall of the guide cylinder 32 contacts the drill bit, and the ball 324 can rotate, thereby reducing the wear on the inner cavity wall of the guide cylinder 32 caused by the drill bit rotating and moving.

[0049] The locking assembly includes a moving ring 325 slidably sleeved on the second cylinder 321, and four handles 326 are fixed at equal intervals on the side wall of the moving ring 325. Limiting holes 3261 are provided on the four handles 326, and the limiting holes 3261 match the positioning column 314. A locking knob 327 is threadedly embedded on the side of the handle 326 away from the moving ring 325. After the threaded portion 322 at the bottom of the guide cylinder 32 is threadedly embedded in the threaded channel 312, the moving ring 325 is moved downward so that the limiting holes 3261 on the four handles 326 are respectively sleeved on the four positioning columns 314 on the bottom cylinder 31, and then the locking knob 327 is tightened so that the tail end of the locking knob 327 conflicts with the side wall of the positioning column 314, thereby making the connection between the guide cylinder 32 and the bottom cylinder 31 firm and stable, and the connection is simple and convenient, and it is also convenient to disassemble and separate.

[0050] The four sides of the second cylinder 321 are provided with vertical slide grooves 3211, and the inner wall of the moving ring 325 is provided with a slider 3251 at the position corresponding to the vertical slide groove 3211. The slider 3251 is slidably nested in the corresponding vertical slide groove 3211, so that the moving ring 325 can slide up and down stably, and the moving ring 325 will not be separated from the second cylinder 321, so that the moving ring 325 can be stably installed on the second cylinder 321.

[0051] The guide mechanism 30 is composed of a bottom cylinder 31 and a guide cylinder 32. After adjusting the inclination angle of the guide mechanism 30, the drill bit is inserted into the guide channel 323 in the guide cylinder 32. The guide channel 323 guides the drilling direction of the drill bit. The inner wall of the guide channel 323 is movably inlaid with balls 324 at equal intervals. The balls 324 can rotate to reduce friction with the drill bit, and at the same time reduce wear on the inner wall of the guide channel 323 caused by the drill bit rotating and moving, thereby increasing the service life of the guide cylinder 32. The installation between the guide cylinder 32 and the bottom cylinder 31 is simple and quick, and is also convenient for disassembly. When the guide cylinder 32 and the bottom cylinder 31 are assembled, the movable ring 325 on the guide cylinder 32 is first moved to the uppermost end, and then the threaded portion 322 at the lower part of the guide cylinder 32 is aligned with the threaded channel 312 on the bottom cylinder 31. The movable ring 325 is rotated to drive the guide cylinder 32 to rotate, so that the threaded portion 322 at the lower part of the guide cylinder 32 is threadedly embedded in the threaded channel 312 on the bottom cylinder 31, and finally the movable ring 325 is rotated to drive the guide cylinder 32 to rotate. The limiting holes 3261 on the four handles 326 on the movable ring 325 are aligned with the four positioning posts 314 on the bottom cylinder 31, and the movable ring 325 is moved downward so that the four handles 326 are respectively sleeved on the corresponding positioning posts 314 through the limiting holes 3261 thereon, and then the locking knob 327 on the handle 326 is tightened so that the tail end of the locking knob 327 is in conflict with the side wall of the positioning post 314, so that the connection between the guide cylinder 32 and the bottom cylinder 31 is firm and stable, effectively preventing the outer The guide cylinder 32 rotates under the action of force. When disassembling, loosen the locking knob 327, then move the movable ring 325 upward to make the handle 326 disengage from the positioning column 314, and then rotate the movable ring 325 in the opposite direction to make the threaded portion 322 of the guide cylinder 32 disengage from the threaded channel 312 on the bottom cylinder 31, that is, the guide cylinder 32 is separated from the bottom cylinder 31. When using drill bits of different specifications to drill holes in the backbone, the guide cylinder 32 that drives the guide channel 323 of the corresponding specifications can be replaced, which is very convenient.

[0052] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An orthopedic drilling guide, characterized in that: include: A supporting frame mechanism (10), the supporting frame mechanism (10) comprising a bottom ring (11), a first worm (12) being rotatably mounted on the front side of the bottom ring (11); The adjusting mechanism (20) comprises a first worm wheel (21), the first worm wheel (21) is rotatably mounted on the upper side of the bottom ring (11), the first worm wheel (21) is drivingly connected to the first worm (12), a through hole (211) is provided in the middle of the first worm wheel (21), protractors (22) are provided at the front and rear parts of the upper side of the first worm wheel (21), a rotating shaft (23) is rotatably mounted at the center point of the two protractors (22), one end of the rotating shaft (23) close to the protractor (22) passes through the protractor (22) and is connected to a pointer (231), and a driving component for driving the two rotating shafts (23) to rotate synchronously is provided on the first worm wheel (21); The guide mechanism (30) comprises a bottom cylinder (31), the two symmetrical sides of the bottom cylinder (31) are respectively connected to the two rotating shafts (23), a guide cylinder (32) is threadedly connected to the bottom cylinder (31), a locking assembly is provided on the guide cylinder (32), and balls (324) are movably embedded in the inner cavity wall of the guide cylinder (32) at equal intervals.

2. An orthopedic drilling guide according to claim 1, characterized in that: The bottom cylinder (31) comprises a first cylinder body (311), a threaded channel (312) is provided on the first cylinder body (311), four support plates (313) are fixed at equal intervals on the top of the outer side of the first cylinder body (311), and a positioning column (314) is fixed on the upper end of the support plate (313); The guide cylinder (32) comprises a second cylinder (321), the bottom of the second cylinder (321) is connected to a threaded portion (322), the threaded portion (322) is threadedly embedded in the threaded channel (312), the second cylinder (321) is provided with a guide channel (323), the bottom end of the guide channel (323) extends to the bottom end of the threaded portion (322), and the ball (324) is movably embedded in the inner wall of the guide channel (323).

3. An orthopedic drilling guide according to claim 2, characterized in that: The locking assembly comprises a moving ring (325) slidably sleeved on the second cylinder (321), four handles (326) are fixed at equal intervals on the side wall of the moving ring (325), and limiting holes (3261) are provided on the four handles (326), and the limiting holes (3261) match the positioning column (314), and a locking knob (327) is threadedly embedded on the side of the handle (326) away from the moving ring (325).

4. An orthopedic drilling guide according to claim 3, characterized in that: The four sides of the second cylinder (321) are provided with vertical slide grooves (3211), and the inner wall of the movable ring (325) is provided with a slider (3251) at a position corresponding to the vertical slide groove (3211), and the slider (3251) is slidably nested in the corresponding vertical slide groove (3211).

5. The orthopedic drilling guide according to claim 1, characterized in that: The driving assembly comprises two second worm wheels (24), two second worm gears (25) and a transmission rod (26); the two second worm wheels (24) are respectively fixedly sleeved on the two rotating shafts (23); the two second worm gears (25) are respectively located on the upper sides of the two second worm wheels (24); the second worm gears (25) are transmission-connected to the second worm wheels (24); the right ends of the two second worm gears (25) are both fixedly connected to the first bevel gear (27); the transmission rod (26) is located between the two first bevel gears (27); both ends of the transmission rod (26) are fixedly connected to the second bevel gear (28); the second bevel gear (28) is meshingly connected to the first bevel gear (27); and a rotating head (29) is fixedly sleeved on the middle of the transmission rod (26).

6. An orthopedic drilling guide according to claim 5, characterized in that: The left and right parts of the second worm (25) are both rotatably sleeved with a third bracket (221), and the third bracket (221) is fixed on the protractor (22). The front and rear ends of the transmission rod (26) are both rotatably sleeved with a second bracket (212), and the second bracket (212) is fixed on the first worm wheel (21).

7. The orthopedic drilling guide according to claim 1, characterized in that: First brackets (111) are fixed to both left and right parts of the front side of the bottom ring (11), the first worm (12) is rotatably connected to the two first brackets (111), and the left end of the first worm (12) is connected to a rotary head (121).

8. The orthopedic drilling guide according to claim 1, characterized in that: Side plates (13) are fixed on both left and right sides of the bottom ring (11); a support plate (14) is fixed on the lower edge of the side plate (13); a screw rod (15) is threadedly passed through the support plate (14); an extrusion block (16) is rotatably connected to the inner wall of the screw rod (15); and a mounting seat (17) is fixed on the bottom of the support plate (14).

9. The orthopedic drilling guide according to claim 1, characterized in that: An arc-shaped slide rail is arranged on the upper side of the bottom ring (11), and a plurality of slide seats are arranged at equal intervals on the bottom of the first worm gear (21), and the slide seats are slidably mounted on the arc-shaped slide rail.

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