Drilling equipment for limb surgery

Abstract

The invention discloses drilling equipment for limb surgery, which mainly comprises a rack, a front support pad, a rear support pad, a drill bit, a transmission sleeve, a rotating frame, an actuator, a motor frame, a moving frame, an electric push rod, a rotating table, a worm and a longitudinal rotating motor, the upper side of the rear end of the machine frame is provided with a rear supporting pad capable of being adjusted vertically and horizontally, the front supporting pad and the rear supporting pad are both provided with fixing belts capable of being opened, the front end of the moving frame is provided with an annular guide rail frame, the moving frame is installed on the upper side of the rear end of the machine frame and can move horizontally, and the rotating table is installed on the guide rail frame and can rotate in the circumferential direction. The actuator is mounted on the front side of the rotating table, the lower end of the actuator is fixedly connected with the motor frame, the rotating frame is rotatably mounted at the front end of the motor frame, the transmission sleeve is mounted at the front end of the rotating frame to form a rotating pair, the electric push rod is mounted between the transmission sleeve and the rotating frame, and the drill bit is rotatably mounted at the lower end of the transmission sleeve, so that the drill bit has extremely high flexibility.

Description

Technical Field

[0001] The present invention relates to the technical field of clinical surgical equipment, and in particular to a drilling device used in limb surgery. Background Art

[0002] In clinical surgery, the reduction and treatment of limb fractures is the most common situation; this is determined by the physiological structure and functional needs of the human body. The main function of the limb bones is to support the body and allow movement. For example, the femur and humerus constitute the main supporting structure of the limbs, allowing the human body to stand, walk and run. The limb bones are connected by joints, forming multiple motion axes, allowing the limbs to perform various flexible movements. In the event of an accident such as a fall or collision, the person will subconsciously use their limbs for protection, which is also the reason for the high incidence of limb fractures.

[0003] In the reduction surgery of the limb bones, it is inevitable to involve the fixation of the support, and it is inevitable to drill and nail the bones. There are many important nerves, blood vessels and other soft tissue structures distributed around the limb bones. Doctors need to be extra careful when drilling. Once damage occurs, it may cause complications such as bleeding, nerve damage, and blood vessel damage, which seriously affect the patient's postoperative recovery and quality of life. In addition, the anatomical structure of the limb bones is relatively complex, and the bone shape, size and density of different parts are different, which increases the difficulty of precise positioning when drilling. Doctors need to have rich anatomical knowledge and surgical experience to ensure that the location, number and depth of the drilling meet the surgical requirements, which also invisibly increases the surgical threshold and treatment cost.

[0004] The invention patent with publication number CN109223095A discloses an orthopedic surgical positioning and drilling device, including a base, a tailstock, etc. The tailstock is installed on the right side of the base, and a first bearing seat is installed on the upper part of the tailstock. An upper L-shaped cylindrical rod is provided in the first bearing seat. Although it can drill holes in bones within a certain range and angle, its application range is very narrow due to its own design defects. For example, the drill bit cannot move along the axial direction of the bone and can only be re-fixed when drilling. In addition, the drill bit can only point to the center of the semi-annular gear for drilling, but the actual bone is not a standard cylindrical shape. Moreover, the drill bit cannot be adjusted in pitch or around to the lower side, which means that it cannot drill holes at an angle inclined to the fracture axis, let alone drill holes from below the bone, and its flexibility is poor.

[0005] The invention patent with the publication number CN114533191A discloses an orthopedic surgery positioning and drilling device, including a base and a driving device. A drill bit is connected to the output end of the driving device. Two groups of threaded rods are symmetrically arranged horizontally above the base, and a driving component cooperating with the claw is horizontally arranged in the middle of the top end of the base. Although the drill bit can move axially on the bone and can also drill holes at an angle inclined to the bone axis, the fixed distance between its two ends cannot be adjusted, and when fixing, the short limb needs to pass through the moving ring, which makes the actual operation difficult. Moreover, the drill bit cannot drill holes from below, and its working space is still very limited, with poor flexibility.

[0006] Therefore, it is very necessary to develop a drilling device that can drill holes in multiple positions, at multiple angles, with high precision and is easy to operate for limb bones. Summary of the Invention

[0007] To solve the deficiencies of the prior art, the object of the present invention is to provide a drilling device for limb surgery, mainly including a frame, a front handwheel, a front locking wheel, a front support pad, a front fixing belt, a rear handwheel, a rear locking wheel, a rear support pad, a rear fixing belt, a drill bit, a transmission sleeve, a rotating frame, a drill bit motor, an actuator, a rotation position motor, a motor frame, a moving frame, a central bevel gear, a moving motor, an electric push rod, a rotating table, a worm, a longitudinal rotation motor, and is characterized in that: a front support is provided at the front end of the frame, and a rear support is provided at the rear end thereof. The two supports are connected into a whole through two round rods. At the front side of the upper end of the rear support, a rear support plate is provided. Inside the rear support plate, a long strip-shaped stepped guide groove that penetrates up and down is vertically provided. At the rear side of the upper end of the rear support, a triangular plate is provided. Three bevel gears are rotatably installed at the outer end of the triangular plate; the threaded rod at the upper end of the front handwheel and the threaded hole at the upper end of the front support form a screw pair. The front locking wheel is coaxially installed with the front handwheel and forms a screw pair. The front support pad is rotatably connected to the upper end of the threaded rod of the front handwheel. Front fixing belts are provided on both sides of the front support pad; the threaded block is installed in the stepped guide groove and can move back and forth. The threaded rod at the upper end of the rear handwheel is installed in cooperation with the threaded hole inside the threaded block and forms a screw pair. The rear locking wheel is coaxially installed with the rear handwheel and forms a screw pair. The rear support pad is rotatably connected to the upper end of the rear handwheel. Rear fixing belts are provided on both sides of the rear support pad; a circular guide rail frame is provided at the front end of the moving frame. A circular left sliding groove and a right sliding groove are provided on the guide rail frame. A circular worm gear is provided between the two sliding grooves. Three screw rods are circumferentially and equally angled at the rear side of the guide rail frame. The moving frame is installed on the triangular plate, and the above three screw rods are respectively installed in cooperation with the threaded holes inside the three bevel gears at the outer end of the triangular plate and form a screw pair; the moving motor is installed at the center of the triangular plate. The central bevel gear is coaxially and firmly connected to the output shaft of the moving motor; the central bevel gear is simultaneously meshed with the three bevel gears at the outer end of the triangular plate through three transmission rods and forms a gear transmission structure; the rotating table is installed on the guide rail frame. The worm is rotatably installed at the upper end inside the rotating table, and the worm is meshed with the worm gear to form a worm and worm gear transmission structure. The rotation position motor is installed on the upper side of the rotating table. The rotation position motor can drive the rotating table to rotate circumferentially on the moving frame through a synchronous belt transmission structure and a worm and worm gear transmission structure; the actuator is installed on the front side of the rotating table. The lower end of the actuator is firmly connected to the motor frame. The rotating frame is installed at the front end of the motor frame and forms a rotating pair. The rear end of the rotating frame is coaxially and firmly connected to the output shaft of the longitudinal rotation motor at the rear side of the motor frame. The transmission sleeve is installed at the front end of the rotating frame and forms a rotating pair. The electric push rod is installed between the transmission sleeve and the rotating frame. The drill bit is rotatably installed at the lower end of the transmission sleeve. The upper end of the drill bit is coaxially and firmly connected to the output shaft of the drill bit motor on the upper side of the transmission sleeve.

[0008] As a further aspect of the present invention: the upper end of the front support pad is an arc structure, a soft silicone pad is provided on the upper side of the arc structure, and front fixing straps are provided on both sides of the front support pad. The front fixing straps are two separable strip structures, and the two strip structures can be connected to each other through Velcro.

[0009] As a further aspect of the present invention: the upper end of the rear support pad is an arc structure, a soft silicone pad is provided on the upper side of the arc structure, and rear fixing straps are provided on both sides of the rear support pad. The rear fixing straps are two separable strip structures, and the two strip structures can be connected to each other through Velcro.

[0010] As a further aspect of the present invention: the three transmission rods have the same structure, and two small bevel gears are provided at both ends of each transmission rod.

[0011] As a further aspect of the present invention: two left support wheels are provided on the left side inside the rotating table, and two right support wheels are provided on the right side inside the rotating table. The two left support wheels are located in the left sliding groove, and at the same time the two right support wheels are located in the right sliding groove.

[0012] Advantages of the present invention: (1) The drill bit as the execution end has six degrees of freedom in space, can drill holes in the limb bones from any angle, has extremely high flexibility, can not only drill holes obliquely, but also drill holes deviating from the central axis, and can fully meet the actual needs of limb bone drilling. (2) The guide rail frame is a complete circular structure, can realize a 360° circumferential rotation, and avoids the defect that the traditional structure cannot drill holes from below the bone. (3) The rear support pad can move back and forth, so it can be adjusted according to the length of the patient's limb, and has wide adaptability. (4) Since the four limbs of the human body are not standard straight lines, the front support pad and the rear support pad can be adjusted independently in the up and down height, so that the patient's limb can be roughly kept at the center position of the moving frame, which is convenient for accurate drilling positioning. (5) Both the front support pad and the rear support pad can rotate freely, so they can swing adaptively according to the patient's limb, and finally, based on the principle of two-point alignment, the fixation of the patient's limb is realized. (6) The moving frame can move backward to the rearmost position, thus avoiding the occlusion of the rear support pad, so that the patient's limb can be directly placed on the front support pad and the rear support pad from above, avoiding threading through the front end of the annular guide rail frame again, which is very convenient to use. Description of the Drawings

[0013] Figure 1 It is a schematic diagram of the overall structure of the present invention in the front view direction.

[0014] Figure 2 It is a schematic diagram of the overall structure of the present invention in the rear view direction.

[0015] Figure 3 It is an enlarged schematic diagram of the front end position of the moving frame in the present invention.

[0016] Figure 4 This is a schematic diagram of the partial cross-sectional structure at the front end of the moving frame in the present invention.

[0017] Figure 5 This is a schematic diagram of an attitude of the present invention in the working state.

[0018] Figure 6 This is a schematic diagram of the structure of the frame in the present invention.

[0019] Figure 7 This is a schematic diagram of the structure of the rotating table in the present invention.

[0020] Figure 8 This is a schematic diagram of the partial cross-sectional structure at the front end of the moving frame in the present invention.

[0021] Reference numerals in the drawings: 1 frame, 101 front support, 102 rear support, 103 rear support plate, 104 triangular plate, 105 first drive frame, 106 third drive frame, 107 second drive frame, 2 front handwheel, 3 front locking wheel, 4 front support pad, 5 front fixing belt, 6 rear handwheel, 7 rear locking wheel, 8 rear support pad, 801 threaded block, 9 rear fixing belt, 10 drill bit, 11 drive sleeve, 12 rotating frame, 1201 electric cylinder connecting ear, 13 drill bit motor, 14 actuator, 15 rotation position motor, 1501 driving wheel, 16 motor frame, 17 moving frame, 1701 first screw rod, 1702 second screw rod, 1703 third screw rod, 1704 retaining ring, 1705 worm gear, 1706 left chute, 1707 right chute, 18 first bevel gear, 19 second bevel gear, 20 third bevel gear, 21 central bevel gear, 22 first drive rod, 23 second drive rod, 24 third drive rod, 25 moving motor, 26 electric push rod, 27 rotating table, 2701 left support wheel, 2702 right support wheel, 2703 worm gear frame, 28 worm, 2801 driven wheel, 29 drive belt, 30 longitudinal rotation motor. Detailed implementation manners

[0022] The present invention will be further described below in conjunction with specific embodiments. The schematic embodiments and descriptions herein are used to explain the present invention, but do not limit the present invention.

[0023] As Figure 1-8As shown in the figure, a drilling device for limb surgery mainly includes a frame 1, a front handwheel 2, a front locking wheel 3, a front support pad 4, a front fixing belt 5, a rear handwheel 6, a rear locking wheel 7, a rear support pad 8, a rear fixing belt 9, a drill bit 10, a transmission sleeve 11, a rotating frame 12, a drill bit motor 13, an actuator 14, a rotation position motor 15, a motor frame 16, a moving frame 17, a first bevel gear 18, a second bevel gear 19, a third bevel gear 20, a central bevel gear 21, a first transmission rod 22, a second transmission rod 23, a third transmission rod 24, a moving motor 25, an electric push rod 26, a rotating table 27, a worm 28, a transmission belt 29, and a longitudinal rotation motor 30. It is characterized in that: a front support 101 is provided at the front end of the frame 1. Two legs are provided at the lower end of the front support 101 to support on the ground. A threaded hole is vertically provided at the upper end of the front support 101. A rear support 102 is provided at the rear end of the frame 1. Two legs are provided at the lower end of the rear support 102 to support on the ground. The front support 101 and the rear support 102 are fixedly connected as a whole by two round rods. A rear support plate 103 is horizontally provided forward at the front side of the upper end of the rear support 102. A long strip-shaped stepped guide groove that penetrates up and down is vertically provided inside the rear support plate 103. A triangular plate 104 is provided at the rear side of the upper end of the rear support 102. Three smooth round holes that penetrate front and rear are provided at the outer end of the triangular plate 104. A motor installation hole is provided at the central position of the triangular plate 104. Three pairs of transmission frames are provided at the rear side of the triangular plate 104. Among them, the first transmission frame 105 is located between the upper threaded hole and the motor installation hole, the second transmission frame 107 is located between the left threaded hole and the motor installation hole, and the third transmission frame 106 is located between the right threaded hole and the motor installation hole.

[0024] As Figure 1As shown, the lower end of the front handwheel 2 is a handwheel structure. A threaded rod is vertically arranged at the upper end of the front handwheel 2. This threaded rod is fitted and installed with the threaded hole at the upper end of the front support 101 to form a thread pair. The front locking wheel 3 is coaxially installed with the threaded rod at the upper end of the front handwheel 2 to form a thread pair. The upper end of the front support pad 4 is an arc-shaped structure. A soft silicone pad is arranged on the upper side of the arc-shaped structure. Front fixing straps 5 are arranged on both sides of the front support pad 4. The front fixing straps 5 are two separable strip structures, and the two strip structures can be connected to each other through Velcro. The lower side of the front support pad 4 is rotatably connected to the upper end of the threaded rod of the front handwheel 2. Thus, by rotating the front handwheel 2, the height position of the front support pad 4 can be adjusted, and the front locking wheel 3 can lock the height position of the front support pad 4 through the double-nut principle; a vertically penetrating threaded hole is provided inside the threaded block 801. The threaded block 801 is installed in the stepped guide groove inside the rear support plate 103 and can move back and forth; the rear handwheel 6 has the same structure as the front handwheel 2. The lower end of the rear handwheel 6 is a handwheel structure. A threaded rod is vertically arranged at the upper end of the rear handwheel 6. This threaded rod is fitted and installed with the threaded hole inside the threaded block 801 to form a thread pair; the rear locking wheel 7 has the same structure as the front locking wheel 3. The rear locking wheel 7 is coaxially installed with the threaded rod at the upper end of the rear handwheel 6 to form a thread pair; the rear support pad 8 has the same structure as the front support pad 4. The upper end of the rear support pad 8 is an arc-shaped structure. A soft silicone pad is arranged on the upper side of the arc-shaped structure. Rear fixing straps 9 are arranged on both sides of the rear support pad 8. The rear fixing straps 9 are two separable strip structures, and the two strip structures can be connected to each other through Velcro. The lower side of the rear support pad 8 is rotatably connected to the upper end of the threaded rod of the rear handwheel 6. Thus, by rotating the rear handwheel 6, the height position of the rear support pad 8 can be adjusted, and the rear locking wheel 7 can lock the height position and the front-back position of the rear support pad 8 through the double-nut principle.

[0025] As Figure 2 , Figure 8As shown, a circular guide rail frame is provided at the front end of the moving frame 17. A circular left sliding groove 1706 is provided on the front side of the guide rail frame, and a circular right sliding groove 1707 is provided on the rear side of the guide rail frame. A circular worm gear 1705 is provided between the left sliding groove 1706 and the right sliding groove 1707. At the upper rear end of the guide rail frame, a first screw rod 1701 extends backward, at the left rear end of the guide rail frame, a second screw rod 1702 extends backward, and at the right rear end of the guide rail frame, a third screw rod 1703 extends backward. The three screw rods are circumferentially equally angularly distributed, and the rear ends of the three screw rods are fixedly connected to the retaining ring 1704. The first bevel gear 18 is installed in the smooth round hole at the upper end of the triangular plate 104 to form a rotating pair. A threaded hole penetrating through the front and rear is provided inside the first bevel gear 18. A bevel gear structure is provided at the rear end of the first bevel gear 18. The second bevel gear 19 has the same structure as the first bevel gear 18. The second bevel gear 19 is installed in the smooth round hole at the left end of the triangular plate 104 to form a rotating pair. The third bevel gear 20 is installed in the smooth round hole at the right end of the triangular plate 104 to form a rotating pair. The moving frame 17 is installed on the triangular plate 104, and the first screw rod 1701 is installed in cooperation with the threaded hole inside the first bevel gear 18 to form a screw pair. The second screw rod 1702 is installed in cooperation with the threaded hole inside the second bevel gear 19 to form a screw pair. The third screw rod 1703 is installed in cooperation with the threaded hole inside the third bevel gear 20 to form a screw pair. The moving motor 25 is fixedly installed in the motor installation hole at the center of the triangular plate 104. The central bevel gear 21 is coaxially and firmly connected to the output shaft of the moving motor 25. Two small bevel gears are provided at both ends of the first transmission rod 22. The first transmission rod 22 is installed in the first transmission frame 105 to form a rotating pair. The small bevel gear at the outer end of the first transmission rod 22 meshes with the first bevel gear 18, and the small bevel gear at the inner end of the first transmission rod 22 meshes with the central bevel gear 21. The second transmission rod 23 has the same structure as the first transmission rod 22. The second transmission rod 23 is installed in the second transmission frame 107 to form a rotating pair. The small bevel gear at the outer end of the second transmission rod 23 meshes with the second bevel gear 19, and the small bevel gear at the inner end of the second transmission rod 23 meshes with the central bevel gear 21. The third transmission rod 24 has the same structure as the first transmission rod 22. The third transmission rod 24 is installed in the third transmission frame 106 to form a rotating pair. The small bevel gear at the outer end of the third transmission rod 24 meshes with the third bevel gear 20, and the small bevel gear at the inner end of the third transmission rod 24 meshes with the central bevel gear 21. Thus, the moving motor 25 can drive the first bevel gear 18, the second bevel gear 19, and the third bevel gear 20 to rotate simultaneously through the gear transmission structure, and further realize the forward and backward movement and positioning of the moving frame 17.

[0026] As Figure 4 , Figure 7As shown, two left support wheels 2701 are provided on the left side inside the rotating table 27, two right support wheels 2702 are provided on the right side inside the rotating table 27, a worm frame 2703 is provided at the upper end inside the rotating table 27. The rotating table 27 is installed on the guide rail frame at the front end of the moving frame 17, and the two left support wheels 2701 are located in the left chute 1706, while the two right support wheels 2702 are located in the right chute 1707. Thus, the rotating table 27 can rotate circumferentially on the rotating table 27; the worm 28 is rotatably installed in the worm frame 2703, and the worm 28 meshes with the worm gear 1705 to form a worm and worm gear transmission structure. A driven wheel 2801 is coaxially provided at the outer end of the worm 28; the rotation position motor 15 is fixedly installed on the upper side of the rotating table 27, and the driving wheel 1501 is coaxially and firmly connected to the output shaft of the rotation position motor 15; the transmission belt 29 is installed between the driving wheel 1501 and the driven wheel 2801 to form a synchronous belt transmission structure. Thus, the rotation position motor 15 can drive the circumferential rotation of the rotating table 27 on the moving frame 17 through the synchronous belt transmission structure and the worm and worm gear transmission structure.

[0027] As Figure 3 shown, the actuator 14 is fixedly installed on the front side of the rotating table 27, and the lower end of the extending rod of the actuator 14 is firmly connected to the upper side of the motor frame 16; the longitudinal rotation motor 30 is fixedly installed at the rear end of the motor frame 16; the rotating frame 12 is installed at the front end of the motor frame 16 to form a rotating pair, and the rear end of the rotating frame 12 is coaxially and firmly connected to the output shaft of the longitudinal rotation motor 30. An electric cylinder connecting ear 1201 is provided on the lower side of the rotating frame 12; the transmission sleeve 11 is installed at the front end of the rotating frame 12 to form a rotating pair; the lower end of the electric push rod 26 is rotatably connected to the electric cylinder connecting ear 1201, and the upper end of the electric push rod 26 is rotatably connected to the upper end of the transmission sleeve 11. Thus, the electric push rod 26 can drive the swing of the transmission sleeve 11 through telescoping; the drill motor 13 is fixedly installed at the upper end of the transmission sleeve 11; the drill bit 10 is rotatably installed at the lower end of the transmission sleeve 11, and the upper end of the drill bit 10 is coaxially and firmly connected to the output shaft of the drill motor 13. Thus, the drill motor 13 can drive the rotation of the drill bit 10.

[0028] The working principle of the drilling equipment: As Figure 1 、 Figure 5As shown in the figure, taking the drilling of leg bones as an example, the moving motor 25 drives the moving frame 17 to move backward, opens the front fixing belt 5 and the rear fixing belt 9, places the patient's leg on the upper side of the front support pad 4, after adjusting the threaded block 801 to a suitable position, places the patient's foot on the upper side of the rear support pad 8, rotates the front handwheel 2 and adjusts the front support pad 4 to a suitable height, rotates the rear handwheel 6 and adjusts the rear support pad 8 to a suitable height, so that the patient's leg is located on the extension line of the axis of the moving frame 17, rotates the front locking wheel 3 and locks the rotation of the front handwheel 2, rotates the rear locking wheel 7 and locks the rotation of the rear handwheel 6 and the position of the threaded block 801, tightens the front fixing belt 5 and the rear fixing belt 9, thus fixing the patient's leg. After that, the actions of each motor and electric cylinder can be adjusted according to the requirements of the drilling position, so that the drill bit 10 reaches the specified position for drilling.

Claims

1. A drilling device for limb surgery, mainly comprising a frame (1), a front handwheel (2), a front locking wheel (3), a front support pad (4), a front fixing strap (5), a rear handwheel (6), a rear locking wheel (7), a rear support pad (8), a rear fixing strap (9), a drill bit (10), a transmission sleeve (11), a rotating frame (12), a drill bit motor (13), an actuator (14), a rotation position motor (15), a motor frame (16), a moving frame (17), a central bevel gear (21), a moving motor (25), an electric push rod (26), a rotating table (27), a worm (28), and a longitudinal rotation motor (30), characterized in that: A front bracket (101) is provided at the front end of the frame (1), and a rear bracket (102) is provided at the rear end thereof. The two brackets are connected into a whole by two round rods. A rear support plate (103) is provided at the front side of the upper end of the rear bracket (102). A long strip-shaped stepped guide groove penetrating up and down is vertically provided inside the rear support plate (103). A triangular plate (104) is provided at the rear side of the upper end of the rear bracket (102). Three bevel gears are rotatably installed at the outer end of the triangular plate (104); The threaded rod at the upper end of the front handwheel (2) and the threaded hole at the upper end of the front bracket (101) form a screw pair. The front locking wheel (3) is coaxially installed with the front handwheel (2) and forms a screw pair. The front support pad (4) is rotatably connected to the upper end of the threaded rod of the front handwheel (2). Front fixing belts (5) are provided on both sides of the front support pad (4); The threaded block (801) is installed in the stepped guide groove and can move back and forth. The threaded rod at the upper end of the rear handwheel (6) is installed in cooperation with the threaded hole inside the threaded block (801) and forms a screw pair. The rear locking wheel (7) is coaxially installed with the rear handwheel (6) and forms a screw pair. The rear support pad (8) is rotatably connected to the upper end of the rear handwheel (6). Rear fixing belts (9) are provided on both sides of the rear support pad (8); A circular guide rail frame is provided at the front end of the moving frame (17). A circular left sliding groove (1706) and a right sliding groove (1707) are provided on the guide rail frame. A circular worm gear (1705) is provided between the two sliding grooves. Three screws are circumferentially and equiangularly provided at the rear side of the guide rail frame. The moving frame (17) is installed on the triangular plate (104), and the above three screws are respectively installed in cooperation with the threaded holes inside the three bevel gears at the outer end of the triangular plate (104) and form a screw pair; The moving motor (25) is installed at the center of the triangular plate (104). The central bevel gear (21) is coaxially and firmly connected to the output shaft of the moving motor (Twenty-five); The central bevel gear (21) is simultaneously engaged with the three bevel gears at the outer end of the triangular plate (104) through three transmission rods and forms a gear transmission structure; The described rotating table (27) is installed on the guide rail frame. The worm (28) is rotatably installed at the upper end inside the rotating table (27), and the worm (28) meshes with the worm gear (1705) to form a worm and worm gear transmission structure. The indexing motor (15) is installed on the upper side of the rotating table (27). The indexing motor (15) can drive the circumferential rotation of the rotating table (27) on the moving frame (17) through a synchronous belt transmission structure and a worm and worm gear transmission structure. The actuator (14) is installed on the front side of the rotating table (27). The lower end of the actuator (14) is fixedly connected to the motor frame (16). The rotating frame (12) is installed at the front end of the motor frame (16) to form a rotating pair. The rear end of the rotating frame (12) is coaxially and fixedly connected to the output shaft of the longitudinal rotation motor (30) on the rear side of the motor frame (16). The transmission sleeve (11) is installed at the front end of the rotating frame (12) to form a rotating pair. The electric push rod (26) is installed between the transmission sleeve (11) and the rotating frame (12). The drill bit (10) is rotatably installed at the lower end of the transmission sleeve (11). The upper end of the drill bit (10) is coaxially and fixedly connected to the output shaft of the drill bit motor (13) on the upper side of the transmission sleeve (11).

2. The drilling device for limb surgery according to claim 1, wherein: The upper end of the described front support pad (4) is of an arc-shaped structure. A soft silicone pad is arranged on the upper side of the arc-shaped structure. The two sides of the front support pad (4) are provided with front fixing straps (5). The front fixing straps (5) are two separable strip-shaped structures, and the two strip-shaped structures can be connected to each other through Velcro.

3. A drilling device for limb surgery according to claim 1, characterized in that: The upper end of the described rear support pad (8) is of an arc-shaped structure. A soft silicone pad is arranged on the upper side of the arc-shaped structure. The two sides of the rear support pad (8) are provided with rear fixing straps (9). The rear fixing straps (9) are two separable strip-shaped structures, and the two strip-shaped structures can be connected to each other through Velcro.

4. A drilling device for limb surgery according to claim 1, characterized in that: The three described transmission rods have the same structure. Two small bevel gears are arranged at both ends of each transmission rod.

5. A drilling device for limb surgery according to claim 1, characterized in that: Two left support wheels (2701) are arranged on the left side inside the rotating table (27), and two right support wheels (2702) are arranged on the right side inside the rotating table (27). The two left support wheels (2701) are located in the left sliding groove (1706), and at the same time, the two right support wheels (2702) are located in the right sliding groove (1707).

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