A medical bone block shaping and sizing device

Abstract

The application belongs to the technical field of bone cutting equipment, and particularly relates to a medical bone block forming size freely adjustable cutting equipment. The medical bone block forming size freely adjustable cutting equipment comprises a touch screen, a machine case, a bone clamping device, a bone segmentation device, a bone slicing device and a bone block storage box. The touch screen is embedded in the machine case panel, and the touch screen is connected with a PLC programmable controller through wires. The bone clamping device is composed of a bone placing plate, a lead screw, a clamping block, a bolt block and a turnover motor. The bone segmentation device is composed of a cutting blade, a blade holder, an up-down adjusting motor of the blade holder, an up-down adjusting arm of the blade holder, an up-down adjusting cross link of the blade holder, an up-down adjusting disc of the blade holder, a distance adjusting motor of the blade holder, a distance adjusting arm of the blade holder, a distance adjusting cross link of the blade holder, a distance adjusting disc of the blade holder, a blade holder rotating motor and a rotating base. The bone slicing device is composed of an eccentric blade, a blade rotating motor, a displacement lead screw, a lead screw displacement motor, a blade rotating motor mounting seat, a guide rail and a sliding block.

Description

Technical Field

[0001] This invention belongs to the technical field of bone fragment cutting equipment, specifically relating to a cutting device for medical bone fragments with freely adjustable forming size. Background Technology

[0002] Bone grafting is a surgical procedure that involves transplanting bone tissue into areas of a patient's body where there are defects in the bone, or where reinforcement or fixation is needed.

[0003] After bone grafting, the process of the human skeleton and the implanted bone block fusing together can be seen under a microscope. During surgery, the bone graft is tightly placed between two or more bone segments that are desired to grow together. Over time, the bone cells within the graft gradually die, leaving only empty cavities in the bone matrix. Simultaneously, new bone tissue continuously grows in. Finally, the bone graft is completely absorbed and replaced by new, living bone tissue. Because bone grafting promotes bone growth and healing, it is increasingly used in surgical procedures. When fractures fail to heal, especially those caused by fracture defects or pseudoarthrosis, bone grafting can promote healing; it can fill cavities left after curettage of benign bone tumors or bone defects formed after resection of benign bone tumors; it can fill cavities left after the removal of bone tuberculosis lesions; and in orthopedics, bone grafting is used to improve fusion efficiency in spinal fusion and joint fusion surgeries.

[0004] In current surgeries, medical staff rely on forceps to pull and tug at the bone to form the required bone blocks. However, this method is time-consuming and labor-intensive, and it cannot guarantee the size of the bone blocks. Bone blocks of varying shapes and sizes will affect the bone grafting effect. On the other hand, medical staff also use bone fragmentation equipment to create bone blocks. However, current bone fragmentation equipment mainly relies on shaped cutting edges to cut the bone. If the shape or size of the bone blocks needs to be adjusted, the cutting blades of the equipment need to be changed. Furthermore, the cutting blades have limited specifications and cannot handle some special situations, nor can they cut bone blocks of arbitrary sizes. Summary of the Invention

[0005] The purpose of this invention is to address the problems existing in current bone cutting equipment technology by providing a cutting device for medical bone blocks with freely adjustable forming dimensions.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a cutting device for medical bone block forming with freely adjustable size includes a touch screen, a chassis, a bone clamping device, a bone segmentation device, a bone slicing device, and a bone block storage box.

[0007] The touch screen is embedded in the chassis panel and is connected to the PLC programmable controller via wires.

[0008] The bone clamping device consists of a bone placement plate, a lead screw, a clamping block, a pin block, and a tilting motor. The tilting motor is fixed to the right side of the baffle inside the machine housing. The pin block is located in front of the tilting motor, and the drive shaft of the tilting motor is fixedly connected to the inner hole of the pin block. The bone placement plate is located in front of the pin block and is connected to the pin block via a hole and a pin. The lead screw is embedded inside the bone placement plate, and the clamping block passes through the lead screw. The clamping block is equipped with a nut that engages with the lead screw, allowing it to move axially as the lead screw rotates, thus clamping the bone. The drive shaft of the tilting motor is fixedly connected to the inner hole of the pin block. The tilting motor is fixedly mounted on the side of the machine housing's protective plate, and the bone placement plate is located below the cutting blade of the bone segmentation device.

[0009] The bone segmentation device consists of a cutting blade, a tool holder, a tool holder up-and-down adjustment motor, a tool holder up-and-down adjustment arm, a tool holder up-and-down adjustment crossbar, a tool holder up-and-down adjustment disc, a tool holder spacing adjustment motor, a tool holder spacing adjustment arm, a tool holder spacing adjustment crossbar, a tool holder spacing adjustment disc, a tool holder rotation motor, and a rotating base.

[0010] The tool post rotary motor is fixed above a baffle inside the machine housing. Below the tool post rotary motor is a rotating base, and the drive shaft of the tool post rotary motor is fixedly connected to the inner hole of the rotating base. On the left and right sides below the rotating base, a tool post up / down adjustment motor and a tool post spacing adjustment motor are respectively mounted via motor mounting brackets. Both motors are fixed within the motor mounting brackets of the rotating base. The drive shaft of the tool post up / down adjustment motor is fixedly connected to the inner hole of the tool post up / down adjustment disc. The side of the tool post up / down adjustment disc has a tool post up / down adjustment arm, and below the tool post up / down adjustment arm is a tool post up / down adjustment crossbar. The drive shaft of the tool post spacing adjustment motor is connected to the inner hole of the tool post spacing adjustment disc. The side of the tool post spacing adjustment disc has a tool post spacing adjustment arm, and below the tool post spacing adjustment arm is a tool post spacing adjustment crossbar. The tool post and tool post connecting rod are installed between the tool post up / down adjustment crossbar and the tool post spacing adjustment crossbar. Cutting blades are installed inside the tool post.

[0011] The bone slicing device consists of an eccentric blade, a blade rotation motor, a displacement screw, a screw displacement motor, a blade rotation motor mounting base, a guide rail, and a slider.

[0012] The blade rotary motor mounting base has a blade rotary motor mounting groove, the blade rotary motor is installed in the blade rotary motor mounting groove, the output shaft of the blade rotary motor extends out of the front end of the blade rotary motor mounting base, and the eccentric blade fixes the end of the output shaft of the blade rotary motor.

[0013] The blade rotary motor mounting base is hollow, and a lead screw and nut are installed at the rear of the mounting base. The lead screw shifting motor is mounted and fixed on the left side of the baffle inside the machine housing. The drive shaft of the lead screw shifting motor is connected to one end of the shifting lead screw, and the other end of the shifting lead screw is installed in the blade rotary motor mounting base, which is fitted with a lead screw nut at the rear of the blade rotary motor mounting base. A slider is provided at the bottom of the blade rotary motor mounting base, and guide rails are installed on both sides of the slider. The guide rails are installed at the bottom of the machine housing.

[0014] A cutting device for medical bone block forming with freely adjustable dimensions is equipped with an electrical control box, which contains a PLC programmable controller and power supply circuitry. The PLC programmable controller is used to control the operating status of each motor and the touch screen.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: A medical bone graft cutting device with adjustable forming size is rationally designed, compact in structure, and easy to use. This invention allows users to input the required bone graft size into the system via a touchscreen. Without changing any components, the PLC programmable controller automatically controls the various motors, which drive the blades to cut the bone into the ideal size and shape. This invention is simple to operate, powerful in function, and highly efficient in cutting. It not only overcomes the problems of inconsistent bone graft sizes and low efficiency caused by traditional manual bone-cutting with forceps, but also overcomes the shortcomings of traditional cutting equipment, which produces bone grafts with relatively uniform shapes and sizes, and cannot change the shape and size of the cut bone grafts without changing the blades. This invention can cut bones of different sizes into sheet-like, strip-like, or granular bone grafts of different sizes by inputting different parameters on the touchscreen without changing the blades, meeting the needs of various bone graft surgeries. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the overall structure of the cutting equipment in an embodiment of the present invention.

[0017] Figure 2 This is a schematic diagram of the internal overall structure of the cutting equipment in an embodiment of the present invention.

[0018] Figure 3 This is a schematic diagram of the bone clamping device in an embodiment of the present invention.

[0019] Figure 4 This is a schematic diagram of the bone segmentation device in an embodiment of the present invention.

[0020] Figure 5 This is a cross-sectional view of the bone segmentation device AA in an embodiment of the present invention.

[0021] Figure 6 This is a schematic cross-sectional view of the bone segmentation device BB in an embodiment of the present invention.

[0022] Figure 7 This is a schematic diagram of the bone slicing device in an embodiment of the present invention.

[0023] The diagram is labeled as follows: 1. Chassis; 2. Touchscreen; 3. Bone clamping device; 4. Bone block storage box; 5. Electrical control box; 6. Bone segmentation device; 7. Bone slicing device; 8. Bone placement plate; 9. Lead screw; 10. Clamping block; 11. Pin block; 12. Tilting motor; 13. Insertion hole; 14. Tool holder rotation motor; 15. Rotating base; 16. Tool holder up / down adjustment motor; 17. Tool holder up / down adjustment plate; 18. Tool holder up / down adjustment arm; 19. Tool holder up / down adjustment crossbar; 20. Cutting blade; 21. Tool holder spacing adjustment. 21. Motor; 22. Tool post spacing adjustment disc; 23. Tool post spacing adjustment arm; 24. Tool post spacing adjustment cross link; 25. Tool post; 26. Upper pin; 27. Middle pin; 28. Lower pin; 29. ​​Lead screw shifting motor; 30. Shifting lead screw; 31. Blade rotation motor mounting base; 32. Blade rotation motor; 33. Eccentric blade; 34. Pin; 35. Guide rail; 36. Connecting rod; 37. Slider; 38. Tool post spacing adjustment motor mounting bracket; 39. Blade rotation motor mounting groove; 40. Tool post up and down adjustment motor mounting bracket. Implementation

[0024] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of this application.

[0025] See attached document Figure 1-7 A cutting device for medical bone blocks with adjustable forming size includes a touch screen 1, a chassis 2, a bone clamping device 3, a bone segmentation device 6, a bone slicing device 7, and a bone block storage box 4.

[0026] The touch screen 2 is embedded in the chassis panel and is connected to the PLC programmable controller via wires.

[0027] The bone clamping device 3 consists of a bone placement plate 8, a lead screw 9, a clamping block 10, a pin block 11, and a flipping motor 12. The bone placement plate 8 is connected to the pin block 11 through a socket 13 and a pin 34. The lead screw 9 is embedded inside the bone placement plate 8. The clamping block 10 passes through the lead screw 9 and is equipped with a nut that engages with the lead screw 9, allowing it to move axially as the lead screw rotates, thus clamping the bone. The drive shaft of the flipping motor is fixedly connected to the inner hole of the pin block 11. The flipping motor 12 is fixedly mounted on the side of the casing plate of the housing 1. The bone placement plate 8 is located below the cutting blade 20 of the bone segmentation device 6.

[0028] The bone segmentation device 6 consists of a cutting blade 20, a tool holder 25, a tool holder up-and-down adjustment motor 16, a tool holder up-and-down adjustment arm 18, a tool holder up-and-down adjustment cross link 19, a tool holder up-and-down adjustment disc 17, a tool holder spacing adjustment motor 21, a tool holder spacing adjustment arm 23, a tool holder spacing adjustment cross link 24, a tool holder spacing adjustment disc 22, a tool holder rotation motor 14, and a rotating base 15.

[0029] The tool post rotary motor 14 is fixed above the baffle inside the machine housing. Below the tool post rotary motor 14 is the rotating base 15, and the drive shaft of the tool post rotary motor is fixedly connected to the inner hole of the rotating base. On the left and right sides below the rotating base 15, the tool post up / down adjustment motor 16 and the tool post spacing adjustment motor 21 are respectively mounted on the motor mounting brackets 38. Both the tool post up / down adjustment motor 16 and the tool post spacing adjustment motor 21 are fixed inside the motor mounting brackets 38 at the bottom of the rotating base. The drive shaft of the tool post up / down adjustment motor 16 is connected to the inner hole of the tool post up / down adjustment plate 17. The side of the tool post up / down adjustment plate 17 is the tool post up / down adjustment arm 18, and below the tool post up / down adjustment arm 18 is the tool post up / down adjustment cross link 19. The drive shaft of the tool post spacing adjustment motor 21 is fixedly connected to the inner hole of the tool post spacing adjustment plate 22. The side of the tool post spacing adjustment plate 22 is the tool post spacing adjustment arm 23, and below the tool post spacing adjustment arm 23 is the tool post spacing adjustment cross link 24. A tool holder 25 and a tool holder connecting rod 36 are installed between the tool holder up and down adjustment cross link 19 and the tool holder spacing adjustment cross link 24. A cutting blade 20 is installed inside the tool holder 25.

[0030] The bone slicing device 7 consists of an eccentric blade 33, a blade rotation motor 32, a displacement lead screw 30, a lead screw displacement motor 29, a blade rotation motor mounting base 31, a guide rail 35, and a slider 37.

[0031] The blade rotary motor mounting base 31 is provided with a blade rotary motor mounting groove 39. The blade rotary motor 32 is installed in the blade rotary motor mounting groove 39. The output shaft of the blade rotary motor 32 extends out of the front end of the blade rotary motor mounting base 31. The eccentric blade 33 fixes the end of the output shaft of the blade rotary motor 32.

[0032] The blade rotary motor mounting base 31 is hollow, and a lead screw nut is installed at the rear of the blade rotary motor mounting base 31. The lead screw shifting motor 29 is mounted and fixed on the left side of the baffle inside the housing 2. The drive shaft of the lead screw shifting motor 29 is connected to one end of the shifting lead screw 30, and the other end of the shifting lead screw 30 is installed in the blade rotary motor mounting base 31 and cooperates with the lead screw nut installed at the rear of the blade rotary motor mounting base 31. A slider 37 is provided at the lower part of the blade rotary motor mounting base 31, and guide rails 35 are installed on both sides of the slider 37. The guide rails 35 are installed at the bottom of the housing 1.

[0033] Start the lead screw shifting motor 29. The lead screw shifting motor 29 drives the blade rotation motor mounting base 31 through the shifting lead screw 30 and lead screw nut. The slider 37 set at the lower part of the blade rotation motor mounting base 31 slides along the guide rails 35 on both sides, guiding the output shaft of the blade rotation motor 32, which is equipped with an eccentric blade 33, to move to one side of the bone clamping device 3. The flipping motor 12 of the bone clamping device 3 drives the pin block 11 to rotate 90°. The pin block 11 then drives the bone placement plate 8 to rotate, thereby flipping the incompletely cut bone clamped on the bone placement plate 8 by 90°, so that the incompletely cut bone faces the bone slicing device 7. Start the blade rotation motor 32. The eccentric blade 33 at the end of the output shaft of the blade rotation motor 32 rotates rapidly, completely cutting off the bone that has been cut by the bone segmentation device 6 from the bone clamping device 3. The cut bone pieces will fall into the bone piece storage box 4.

[0034] A cutting device for medical bone block forming with freely adjustable dimensions is equipped with an electrical control box 5. The electrical control box contains a PLC programmable controller and power supply circuits, etc. The PLC programmable controller is used to control the working status of each motor and control the touch screen. Example

[0035] as follows Figure 1 and Figure 2 In the illustrated embodiment, a cutting device for medical bone grafts with adjustable forming size comprises a touchscreen 2, a chassis 1, a bone clamping device 3, a bone segmentation device 6, a bone slicing device 7, and a bone graft storage box 4. The touchscreen 2 is embedded in the chassis panel (chassis cover plate) 1. The user can input the final bone graft size parameters into the system via the touchscreen 2 according to the requirements for bone graft size during bone grafting surgery. The PLC programmable controller controls the working status of each motor, which drives the blades to cut the bone into the ideal size and shape.

[0036] The bone clamping device 3 is used by the user to place the bone to be cut. A nut on the clamping block 10 engages with the lead screw 9, allowing axial movement as the lead screw 9 rotates, thus clamping the bone to be cut. After the bone to be cut is placed, the user presses the start button on the touchscreen 2. The system automatically adjusts the bone segmentation device 6. The bone segmentation device 6 cuts the bone into bone slices in one cut or into bone strips in two cuts according to preset parameters. However, the bone slices or strips are not completely separated; they are connected to each other through the bottom plane of the uncut bone that contacts the bone clamping device 3. Then, the flipping motor 12 of the bone clamping device 3 drives the pin block 11 to rotate 90°. The pin block 11 then drives the bone placement plate 8 to rotate, causing the incompletely cut bone held on the bone placement plate 8 to rotate 90°, facing the bone slicing device 7. According to the bone block size parameters set by the system, the bone slicing device 7 completely cuts the bones that have been previously cut by the bone segmentation device 6 from the bone clamping device 3 in one or more steps. The cut bone blocks will fall into the bone block storage box 4. The bone block storage box 4 can be freely disassembled for easy access to the bone blocks.

[0037] A cutting device for medical bone block forming with freely adjustable dimensions is equipped with an electrical control box 5. The electrical control box contains a PLC programmable controller and power supply circuits, etc. The PLC programmable controller is used to control the working status of each motor and control the touch screen.

[0038] as follows Figure 3 As shown, the bone clamping device 3 comprises a bone placement plate 8, a lead screw 9, a clamping block 10, a pin block 11, and a flipping motor 12. The lead screw 9 is embedded inside the bone placement plate 8, with one end being an external hexagon located on the side of the bone placement plate 8. The clamping block 10 passes through the lead screw 9 and is equipped with a nut that engages with the lead screw 9. Rotating the external hexagon at one end of the lead screw 9 with a tool can rotate the entire lead screw. Since the lead screw 9 is embedded inside the bone placement plate 8, it can only rotate around its central axis but cannot move axially. Therefore, the clamping block 10 can move axially along the lead screw 9 under its influence. The bone placement plate 8 has a low step at its edge. The bone to be cut is placed between the edge step of the bone placement plate 8 and the clamping block 10. Rotating the external hexagon at the rear end of the lead screw 9 will firmly clamp the bone to be cut between the edge step of the bone placement plate 8 and the clamping block 10.

[0039] Furthermore, the bone placement plate 8 has two insertion holes 13 inside, and two pins 34 on the side of the pin block 11. The bone placement plate 8 is connected to the pin block 11 through the insertion holes 13 and pins 34. The insertion holes 13 and pins 34 are clearance fit, which facilitates the quick disassembly and installation of the bone placement plate 8. The pin block 11 is fixedly connected to the flip motor 12 through an interference fit between the hole and shaft. The flip motor 12 is fixedly installed on the side of the housing plate of the chassis 1. The bone placement plate 8 is located below the cutting blade 20 of the bone segmentation device 6.

[0040] Furthermore, in order to reduce the workload of the flip motor 12, all other components in the bone clamping device 3, except for the flip motor 12, are made of high-strength, lightweight medical-grade polyetheretherketone material.

[0041] as follows Figure 4 , Figure 5 and Figure 6 As shown, the bone segmentation device 6 consists of a cutting blade 20, a blade holder 25, a blade holder up / down adjustment motor 16, a blade holder up / down adjustment disc 17, a blade holder up / down adjustment arm 18, a blade holder up / down adjustment cross link 19, a blade holder spacing adjustment motor 21, a blade holder spacing adjustment disc 22, a blade holder spacing adjustment arm 23, a blade holder spacing adjustment cross link 24, a blade holder rotation motor 14, and a rotating base 15. The connecting rods 36 of the blade holder 25 are movably connected by upper pins 26, middle pins 27, and lower pins 28 to achieve an X-shaped grid structure. The cutting blade 20 is connected to the blade holder 25 via upper pins 26 and lower pins 28.

[0042] The tool post up-and-down adjustment cross brace 19 is provided with a through groove (hollow structure), which is connected to all the center pins 27 in the tool post 25. The upper boss of the tool post up-and-down adjustment cross brace 19 is in movable (clear clearance) fit with the lower pin hole of the tool post up-and-down adjustment arm 18. The upper pin hole of the tool post up-and-down adjustment arm 18 is in clearance fit with the eccentric boss of the tool post up-and-down adjustment plate 17. The shaft of the tool post up-and-down adjustment motor 16 is fixedly connected to the center hole of the tool post up-and-down adjustment plate 17 (interference fit). The tool post up-and-down adjustment motor 16 is fixed in the tool post up-and-down adjustment motor mounting bracket 40 under the rotating base 15. When it is necessary to cut the bone, the rotation of the tool holder up and down adjustment motor 16 can drive the tool holder up and down adjustment plate 17 to rotate. During the rotation of the tool holder up and down adjustment plate 17, the eccentric boss on the tool holder up and down adjustment plate 17 can drive the tool holder up and down adjustment arm 18 to swing. During the swing of the tool holder up and down adjustment arm 18, it can also drive the tool holder up and down adjustment cross linkage 19 to move up and down, and then drive the entire tool holder 25 to move up and down, so as to realize the cutting blade 20 cutting the bone downward and resetting upward after the cutting is completed. In order to avoid the cutting blade 20 interfering with the low step at the edge of the bone placement plate 8 during the cutting process, the system will automatically limit the downward stroke of the cutting blade 20 to 1mm above the upper surface of the low step at the edge of the bone placement plate 8.

[0043] The tool post spacing adjustment cross link 24 is provided with a through groove (hollow structure), which is connected to all the upper pins 26 in the tool post 25. The upper boss of the tool post spacing adjustment cross link 24 is clearance-fitted with the lower pin hole of the tool post spacing adjustment arm 23, and the upper pin hole of the tool post spacing adjustment arm 23 is movable (clear clearance-fitted) with the eccentric boss of the tool post spacing adjustment disc 22. The rotating shaft of the tool post spacing adjustment motor 21 is fixedly connected to the center hole of the tool post spacing adjustment disc 22 (interference fit), and the tool post spacing adjustment motor 21 is fixed in the tool post spacing adjustment motor mounting bracket 38 under the rotating base 15. When it is necessary to adjust the size of the bone being cut, only the blade spacing needs to be adjusted. The rotation of the blade spacing adjustment motor 21 drives the blade spacing adjustment disc 22 to rotate. During the rotation of the blade spacing adjustment disc 22, the eccentric boss on the blade spacing adjustment disc 22 drives the blade spacing adjustment arm 23 to swing. During the swing of the blade spacing adjustment arm 23, it can also drive the blade spacing adjustment cross link 24 to move up and down. Then, the X-shaped grid blade holder 25 retracts inward, reducing the gap between the cutting blades 20; or the X-shaped grid blade holder 25 expands to both sides, increasing the gap between the cutting blades 20, thereby achieving control over the size of the bone cutting.

[0044] The tool holder rotary motor 14 is fixed to the upper part of the machine box (box guard plate) 1. After the bone is cut by the cutting blade 20 for the first time, the bone is in the shape of bone slices. If the bone is to be in the shape of bone strips, the bone needs to be cut a second time. At this time, the tool holder rotary motor 14 drives the rotating base 15 to rotate 90°. The rotating base 15 then drives the tool holder 25 and multiple cutting blades 20 below to rotate 90° as a whole. The tool holder up and down adjustment motor 16 drives multiple parts to work. Finally, the cutting blade 20 moves downward to cut the bone a second time, so that the bone is cut into the shape of bone strips. However, due to the limitation of the downward stroke of the cutting blade 20, the bone slices or bone strips are not completely separated from each other. They are connected to each other through the bottom plane of the uncut bone that is in contact with the bone clamping device 3.

[0045] as follows Figure 7As shown, the bone slicing device 7 consists of an eccentric blade 33, a blade rotation motor 32, a shifting screw 30, a screw shifting motor 29, guide rails 35, and a slider 31. The screw shifting motor 29 is fixed to the side of the housing (housing plate) 1. The shaft of the screw shifting motor 29 is interference-fitted with the shaft of the shifting screw 30. The shifting screw 30 is threadedly connected to the slider 31. The blade rotation motor 32 is fixed in the groove inside the slider 31 by screws. The bottom of the slider 31 does not contact the lower part of the housing (housing plate) 1. Guide rails 35 are located on both sides of the slider 31. The eccentric blade 33 and the rotating shaft of the blade rotation motor 32 are fixedly connected by a shaft (interference-fit connection). The connection hole of the eccentric blade 33 is offset at one end of the blade. When not in operation, the end of the eccentric blade 33 closer to the bone to be cut is the short side, and the end closer to the bone storage box 4 is the long side. When it is necessary to completely cut a bone block from the bone, the lead screw shifting motor 29 drives the shifting lead screw 30 to rotate. The shifting lead screw 30 rotates in the slider 31. Since the slider 31 is sandwiched in the middle by the two guide rails 35, the angular movement of the slider 31 is restricted. Therefore, the slider 31 can only move axially back and forth along the guide rails 35. According to the final size of the bone block to be cut, the slider 31 moves along the guide rail to move the eccentric blade 33 to the bottom of the bone to be cut. Since the end of the eccentric blade 33 closest to the bone to be cut is the short side, the eccentric blade 33 will not interfere with the bone during the movement. After the slider 31 drives the eccentric blade 33 to the position, the blade rotation motor 32 drives the eccentric blade 33 to rotate. The bone is completely cut off into the required bone block through the long side of the eccentric blade 33. The bone block will eventually fall into the bone block storage box 4. The bone block storage box 4 is not fixedly connected to any mechanism. The user can freely remove the bone block storage box 4 and take out the bone block for bone grafting surgery.

[0046] This invention provides a medical bone block cutting device with adjustable forming size. The user inputs the desired bone block size on a touchscreen, then fixes allogeneic or homologous bone onto a bone clamping plate. A control system with a PLC programmable controller adjusts the blade spacing based on the user-input bone size data. The blades cut downwards, cutting the bone above the clamped portion into sheet-like blocks. The blades then rotate 90° and continue cutting downwards, further cutting the bone above the clamped portion into strip-like blocks. A flip motor rotates the bone clamping plate 90°, and an eccentric blade, based on user input data, moves below the bone and rotates to cut the bone into multiple granular blocks. These blocks finally fall into a bone block storage box below. This invention allows for the cutting of bones of different sizes into sheet-like, strip-like, or granular blocks of different sizes by inputting different parameters on the touchscreen without changing the blades, meeting the needs of various bone graft surgeries.

Claims

1. A cutting device for medical bone block forming with freely adjustable dimensions, characterized in that, Includes a touch screen, chassis, bone clamping device, bone segmentation device, bone slicing device, and bone block storage box; The touch screen is embedded in the chassis panel and is connected to the PLC programmable controller via wires; The skeleton clamping device consists of a skeleton placement plate, a lead screw, a clamping block, a pin block, and a flipping motor; The bone segmentation device consists of a cutting blade, a tool holder, a tool holder up-and-down adjustment motor, a tool holder up-and-down adjustment arm, a tool holder up-and-down adjustment crossbar, a tool holder up-and-down adjustment disc, a tool holder spacing adjustment motor, a tool holder spacing adjustment arm, a tool holder spacing adjustment crossbar, a tool holder spacing adjustment disc, a tool holder rotation motor, and a rotating base. The bone slicing device consists of an eccentric blade, a blade rotation motor, a shifting lead screw, a lead screw shifting motor, a blade rotation motor mounting base, a guide rail, and a slider. Below the tool post rotary motor is a rotating base, and the drive shaft of the tool post rotary motor is fixedly connected to the inner hole of the rotating base. On the left and right sides below the rotating base are respectively mounted a tool post up / down adjustment motor and a tool post spacing adjustment motor. The drive shaft of the tool post up / down adjustment motor is fixedly connected to the inner hole of the tool post up / down adjustment disc. The side of the tool post up / down adjustment disc is a tool post up / down adjustment arm, and below the tool post up / down adjustment arm is a tool post up / down adjustment cross link. The drive shaft of the tool post spacing adjustment motor is connected to the inner hole of the tool post spacing adjustment disc. The side of the tool post spacing adjustment disc is a tool post spacing adjustment arm, and below the tool post spacing adjustment arm is a tool post spacing adjustment cross link. A tool post and a tool post connecting rod are installed between the tool post up / down adjustment cross link and the tool post spacing adjustment cross link. Cutting blades are installed inside the tool post. The connecting rods of the tool holder are movably connected by upper pins, middle pins and lower pins to realize an X-shaped grid structure. The cutting blade is connected to the tool holder through upper pins and lower pins. The tool holder's up-and-down adjustment crossbar is equipped with a through groove, which connects to all the center pins in the tool holder. The upper boss of the tool post up and down adjustment cross brace is in movable fit with the lower pin hole of the tool post up and down adjustment arm; the upper pin hole of the tool post up and down adjustment arm is in movable fit with the eccentric boss of the tool post up and down adjustment plate; and the rotating shaft of the tool post up and down adjustment motor is fixedly connected to the center hole of the tool post up and down adjustment plate. The tool holder spacing adjustment cross brace is provided with a through groove, which is connected to all the upper pins in the tool holder; The upper boss of the tool post spacing adjustment cross link is clearance-fitted with the lower pin hole of the tool post spacing adjustment arm, the upper pin hole of the tool post spacing adjustment arm is movablely fitted with the eccentric boss of the tool post spacing adjustment disc, and the rotating shaft of the tool post spacing adjustment motor is fixedly connected to the center hole of the tool post spacing adjustment disc.

2. The cutting device for medical bone block forming with freely adjustable dimensions according to claim 1, characterized in that, In the bone clamping device, the flipping motor is fixed to the right side of the baffle inside the machine housing, the pin block is located in front of the flipping motor, and the drive shaft of the flipping motor is connected to the inner hole of the pin block; there is a bone placement plate in front of the pin block, the bone placement plate is connected to the pin block through the insertion hole and the pin, the lead screw is embedded in the bone placement plate, the clamping block passes through the lead screw, the clamping block is provided with a nut to cooperate with the lead screw, and can move axially with the rotation of the lead screw to clamp the bone; the drive shaft of the flipping motor is fixedly connected to the inner hole of the pin block, the flipping motor is fixedly installed on the side of the housing protective plate of the machine housing, and the bone placement plate is located below the cutting blade of the bone segmentation device.

3. The cutting device for medical bone block forming with freely adjustable dimensions according to claim 1, characterized in that, In the bone segmentation device, the blade holder rotation motor is fixed above the baffle inside the machine housing, and the blade holder up-down adjustment motor and the blade holder spacing adjustment motor are both fixed inside the motor mounting bracket of the rotating base.

4. The cutting device for medical bone block forming with freely adjustable dimensions according to claim 1, characterized in that, The tool post up-and-down adjustment motor is fixed inside the tool post up-and-down adjustment motor mounting bracket at the bottom of the rotating base.

5. The cutting device for medical bone block forming with freely adjustable dimensions according to claim 1, characterized in that, In the bone slicing device, the blade rotary motor mounting base is provided with a blade rotary motor mounting groove, the blade rotary motor is installed in the blade rotary motor mounting groove, the blade rotary motor output shaft extends out of the front end of the blade rotary motor mounting base, and the eccentric blade fixes the end of the blade rotary motor output shaft. The blade rotary motor mounting base is hollow, and a lead screw nut is installed at the rear of the blade rotary motor mounting base; The lead screw shifting motor is installed and fixed on the left side of the baffle inside the machine housing. The drive shaft of the lead screw shifting motor is connected to one end of the shifting lead screw, and the other end of the shifting lead screw is installed in the blade rotary motor mounting base and cooperates with the lead screw nut installed at the rear of the blade rotary motor mounting base. A slider is provided at the lower part of the blade rotary motor mounting base, and guide rails are installed on both sides of the slider. The guide rails are installed at the bottom of the machine housing.

6. The cutting device for medical bone block forming with freely adjustable dimensions according to claim 1, characterized in that, The tool post spacing adjustment motor is fixed inside the tool post spacing adjustment motor mounting bracket at the bottom of the rotating base.

7. The cutting device for medical bone block forming with freely adjustable dimensions according to claim 1, characterized in that, A cutting device for medical bone block forming with freely adjustable size is equipped with an electrical control box, which contains a PLC programmable controller and a power supply circuit; the PLC programmable controller is used to control the working status of each motor and control the touch screen.

Images