Clamping device for grinding allogeneic bone

Abstract

The invention relates to the technical field of joint prosthesis processing, and discloses a clamping device for allogeneic bone grinding, which comprises a base sliding rail and two groups of circular ring seats, a rotating seat ring is rotatably mounted on an inner ring of the circular ring seat in a drivable manner, an iris clamping mechanism is arranged on the rotating seat ring, the iris clamping mechanism comprises a rotating ring and a plurality of groups of opening and closing plates, and the rotating ring is used for driving the opening and closing actions of the plurality of groups of opening and closing plates; the multiple sets of positioning chucks jointly position and clamp the allogeneic bone, and flexible chucks used for stably positioning the allogeneic bone are further arranged on the positioning chucks. According to the iris clamping mechanism, synchronous opening and closing of all the chucks are achieved through one-position driving, the operation process is simplified, and efficient synchronous control is achieved; the buffer spring enables each positioning chuck to be independently and elastically adjusted and to be tightly attached to a non-uniform bone shape, local stress concentration is avoided, and the self-adaptive clamping capacity is achieved; and the flexible chuck and the positioning chuck form a double contact surface, so that friction is increased to prevent the aggregate from slipping.

Description

Technical Field

[0001] This invention relates to the field of joint prosthesis processing technology, specifically to a clamping device for grinding allogeneic bone. Background Technology

[0002] Allogeneic bone is widely used in orthopedics, generally divided into structural bone grafting and filling bone grafting. Existing allogeneic bone grafts require rough grinding followed by fine grinding before use to ensure the bone's shape and size perfectly match the patient. In current technologies, the clamping device typically uses two relatively moving clamping plates to hold the allogeneic bone during the grinding process.

[0003] A prior art application (CN202323217230.7) provides a clamping device for grinding allogeneic bone, comprising a base plate, two supports, and two clamps. Each support is mounted on the base plate and the two supports are arranged opposite to each other. Each support has a rotatable central shaft. The clamps correspond one-to-one with the supports, and the two clamps are symmetrically arranged, with each clamp located at one end of the central shaft. This application allows the two clamps to rotate, enabling multi-directional grinding without repeatedly disassembling and reassembling the allogeneic bone to adjust the grinding surface, thereby improving grinding efficiency. However, the prior art, especially this solution, still has the following problems: Poor stability: Due to the irregular shape of allogeneic bone, existing clamping devices rely solely on two rigid clamping plates for point-to-point clamping, which cannot evenly conform to the bone surface. During grinding rotation, the bone is prone to wobbling due to insufficient contact surface, which may even cause bone material displacement and affect grinding accuracy. Low operating efficiency: Although the rotation of the central axis avoids repeated disassembly and assembly, the opening and closing of the clamps require independent operation and control, making it impossible to achieve synchronous action. Operators need to manually adjust the clamp position and clamping force multiple times, which prolongs preparation time and reduces overall grinding efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a technical solution that uses an iris clamping mechanism to clamp and grind allogeneic bone for rotation, while also using flexible clamping to achieve high stability, thereby solving the problems in the prior art mentioned in the background section.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A clamping device for grinding allogeneic bone includes: The base slide rail and two sets of circular seats are adjustablely slidably mounted on the base slide rail. The inner ring of the circular seat is rotatably mounted with a rotating seat ring. An iris clamping mechanism is provided on the rotating seat ring. The iris clamping mechanism includes a rotating ring and multiple sets of opening and closing plates. The rotating ring is used to drive the opening and closing action of the multiple sets of opening and closing plates. An installation bracket is installed at one end of the opening and closing plate near the axis of the circular seat. The installation bracket is equipped with a positioning clamp through a buffer spring and a plug rod. Multiple sets of positioning clamps work together to position and hold the allogeneic bone, and the positioning clamps are also equipped with flexible clamps for stabilizing the positioning of the allogeneic bone.

[0006] Preferably, the positioning clamps inside the two sets of rotating seats clamp the two ends of the allogeneic bone, and the rotating seats are driven to rotate on the annular seat to achieve the driving rotation of the allogeneic bone.

[0007] Preferably, the flexible clamps on the positioning clamp are arranged along the axis of the rotating seat ring, and flexible clamps are arranged symmetrically on both sides of the positioning clamp. When multiple sets of positioning clamps clamp the allogeneic bone, the contact surface between the flexible clamps and the allogeneic bone is provided with anti-slip texture, and multiple sets of flexible clamps also simultaneously adhere to the surface of the allogeneic bone to increase the clamping friction.

[0008] Preferably, connecting blocks are connected to both sides of the positioning clamp, and the flexible clamp is connected to the positioning clamp through the connecting blocks.

[0009] Preferably, the opening and closing plates are rotatably mounted on the rotating seat ring, and multiple sets of opening and closing plates are arranged in a ring array. A connecting rod is provided between the rotating ring and the opening and closing plates. One end of the connecting rod is rotatably connected to the opening and closing plates, and the other end of the connecting rod is rotatably connected to the inner ring of the rotating ring. The rotating ring drives the connecting rod to realize the simultaneous opening and closing operation of multiple sets of opening and closing plates by rotating.

[0010] Preferably, the rotating seat ring is provided with multiple sets of positioning rods, and the rotating ring is provided with multiple sets of positioning holes, with the positioning rods positioned and assembled inside the positioning holes.

[0011] Preferably, a drive motor is mounted on the annular seat, a drive wheel is mounted on the output shaft of the drive motor, and a drive ring is provided on the rotating seat. The drive wheel and the drive ring are in driving contact, and the drive motor drives the rotating seat to rotate through the drive wheel and the annular seat.

[0012] Preferably, a drive push rod is provided between the rotating seat ring and the rotating ring. One end of the telescopic rod of the drive push rod is rotatably mounted on the rotating seat ring, and the other end of the drive push rod is rotatably mounted on the rotating ring. The drive push rod is used as the drive source for opening and closing multiple sets of opening and closing plates. A battery is provided on the rotating seat ring for powering the drive push rod.

[0013] Preferably, the base slide rail is provided with two sets of sliders, each slider is provided with a mounting seat and a connector, the mounting seat and the connector are detachably locked together, and the annular seat is vertically mounted on the slider via the mounting seat.

[0014] Preferably, both ends of the base slide rail are equipped with movable push rods, and the telescopic rods of the movable push rods are connected to the slider to realize the position adjustment drive of the annular seat on the base slide rail.

[0015] Technical effects and advantages of the present invention: The clamping device for grinding allogeneic bone proposed in this invention has the following advantages compared with the prior art: This invention uses an iris clamping mechanism to achieve synchronous opening and closing of all clamps through a single drive, simplifying the operation process and achieving efficient synchronous control; the buffer spring allows each positioning clamp to be independently elastically adjusted, closely conforming to the non-uniform bone shape, avoiding local stress concentration and achieving adaptive clamping capability; the flexible clamp and the positioning clamp form a double contact surface, increasing friction and preventing the aggregate from slipping. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the clamping device of the present invention; Figure 2 This is a front view schematic diagram of the clamping device of the present invention; Figure 3 This is one of the structural schematic diagrams of the annular seat and iris clamping mechanism in an embodiment of the present invention; Figure 4 This is the second schematic diagram of the structure of the annular seat and the iris clamping mechanism in an embodiment of the present invention; Figure 5 This is a schematic diagram of the planar structure of the iris clamping mechanism in an embodiment of the present invention; Figure 6 This is one of the schematic diagrams of the positioning chuck and flexible chuck in an embodiment of the present invention; Figure 7 This is a schematic diagram of the clamping method of the iris clamping mechanism in an embodiment of the present invention; Figure 8 This is a second schematic diagram of the positioning chuck and flexible chuck structures in an embodiment of the present invention.

[0017] In the picture: 11. Base slide rail; 12. Slider; 13. Moving push rod; 14. Mounting base; 15. Connecting parts; 21. Circular seat; 22. Rotating seat ring; 23. Rotating ring; 24. Positioning hole; 25. Connecting rod; 26. Positioning rod; 27. Opening / closing plate; 28. Drive motor; 29. ​​Drive wheel; 210. Drive ring; 211. Drive push rod; 212. Mounting bracket; 213. Buffer spring; 214. Insert rod; 215. Positioning chuck; 216. Connecting block; 217. Flexible chuck; Detailed Implementation

[0018] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and implement the subject matter described herein, and changes may be made to the function and arrangement of the elements discussed without departing from the scope of this specification. Various processes or components may be omitted, substituted, or added as needed in the examples. Furthermore, features described in some examples may be combined in other examples.

[0019] Example: The invention provides, as follows Figures 1 to 8 As shown, a clamping device for grinding allogeneic bone includes: The base slide rail 11 and two sets of annular seats 21 are slidably mounted on the base slide rail 11. The inner ring of the circular seat 21 is rotatably mounted with a rotating seat ring 22. An iris clamping mechanism is provided on the rotating seat ring 22. The iris clamping mechanism includes a rotating ring 23 and multiple sets of opening and closing plates 27. The rotating ring 23 drives the opening and closing actions of the multiple sets of opening and closing plates 27. A mounting bracket 212 is mounted on one end of the opening and closing plate 27 near the axis of the circular seat 21. A positioning clamp 215 is mounted on the mounting bracket 212 via a buffer spring 213 and a insertion rod 214. The specific installation method of the buffer spring 213 and the insertion rod 214 is as follows: Figure 6 and Figure 8 As shown; Multiple positioning clamps 215 work together to position and hold the allogeneic bone. The positioning clamps 215 are also equipped with flexible clamps 217 for stabilizing the positioning of the allogeneic bone.

[0020] Working principle: Iris synchronous clamping, rotating ring 23 drives opening and closing plate 27, the iris clamping mechanism controls multiple sets of opening and closing plates 27 to open and close synchronously through the single action of rotating ring 23, realizing the coordinated movement of multiple positioning clamps 215; adaptive clamp design, each positioning clamp 215 is connected to the mounting bracket 212 through buffer spring 213 and insertion rod 214, so that the clamp can elastically move and adaptively conform to irregular bone surfaces; dual stabilizing structure, flexible clamp 217 auxiliary positioning: directly set on the positioning clamp 215, cooperating with buffer spring 213, synchronously conforming to the bone surface during clamping, enhancing friction. Highly efficient synchronous control: The iris clamping mechanism achieves synchronized opening and closing of all clamps through a single drive, simplifying the operation process. Adaptive clamping capability: The buffer spring 213 allows each positioning clamp 215 to be independently and elastically adjusted, closely conforming to non-uniform bone shapes and avoiding localized stress concentration. Anti-slip stability: The flexible clamp 217 and the positioning clamp 215 form a double contact surface, increasing friction and preventing aggregate slippage.

[0021] An iris clamping mechanism is used to clamp allogeneic bone with uneven shape. Each positioning chuck 215 has an elastic clamping function, which can effectively clamp the outer surface of the allogeneic bone. At the same time, a flexible chuck 217 is also provided to clamp the surface of the allogeneic bone. The iris clamping mechanism can realize the synchronous clamping of multiple positioning chucks 215 through a single drive. The positioning chucks 215 can adapt to the clamping position through a buffer spring 213. By coordinating the clamping methods, a more stable and effective clamping method is obtained. Because of the uneven shape of the allogeneic bone, a certain degree of sway is inevitable during grinding and rotation. The combination of positioning chucks 215 and flexible chucks 217 can achieve good stability, thereby improving the grinding effect of the operator.

[0022] like Figure 7 As shown, regarding the actual clamping method of the two sets of rotating seats 22 for allogeneic bone, the positioning chucks 215 inside the two sets of rotating seats 22 clamp the two ends of the allogeneic bone respectively, and the rotating seats 22 are driven to rotate on the ring seat 21 to achieve the driving rotation of the allogeneic bone.

[0023] like Figure 2 , Figure 3 and Figure 7 As shown, in order to enable the allogeneic bone to be driven to rotate after the two sets of rotating seats 22 are clamped, the flexible chucks 217 on the positioning chuck 215 are arranged along the axial direction of the rotating seat 22. The flexible chucks 217 are symmetrically arranged on both sides of the positioning chuck 215. When multiple sets of positioning chucks 215 clamp the allogeneic bone, the contact surface between the flexible chucks 217 and the allogeneic bone is provided with anti-slip texture. The multiple sets of flexible chucks 217 also adhere to the surface of the allogeneic bone at the same time to increase the clamping friction.

[0024] like Figures 6 to 8 As shown, specifically regarding the connection method of the flexible chuck 217, the two sides of the positioning chuck 215 are connected to the connecting blocks 216, and the flexible chuck 217 is connected to the positioning chuck 215 through the connecting blocks 216.

[0025] like Figures 3 to 5As shown, the opening and closing plates 27 are rotatably mounted on the rotating seat ring 22, and multiple sets of opening and closing plates 27 are arranged in a circular array. A connecting rod 25 is provided between the rotating ring 23 and the opening and closing plates 27. One end of the connecting rod 25 is rotatably connected to the opening and closing plates 27, and the other end of the connecting rod 25 is rotatably connected to the inner ring of the rotating ring 23. The rotating ring 23 drives the connecting rod 25 to realize the simultaneous opening and closing operation of multiple sets of opening and closing plates 27. Regarding the basic structure of the iris clamping mechanism, as follows... Figure 5 As shown, the rotating seat ring 22 is provided with multiple sets of positioning rods 26, and the rotating ring 23 is provided with multiple sets of positioning holes 24. The positioning rods 26 are positioned and assembled inside the positioning holes 24.

[0026] like Figure 4 As shown, in order to drive the rotating seat ring 22 to rotate on the annular seat 21, a drive motor 28 is installed on the annular seat 21, a drive wheel 29 is installed on the output shaft of the drive motor 28, and a drive ring 210 is provided on the rotating seat ring 22. The drive wheel 29 and the drive ring 210 are in drive contact, and the drive motor 28 drives the rotating seat ring 22 to rotate through the drive wheel 29 and the annular seat 21.

[0027] like Figure 5 As shown, in order to drive the iris clamping mechanism, i.e. the opening and closing of multiple sets of opening and closing plates 27, a drive push rod 211 is provided between the rotating seat ring 22 and the rotating ring 23. One end of the telescopic rod of the drive push rod 211 is rotatably mounted on the rotating seat ring 22, and the other end of the drive push rod 211 is rotatably mounted on the rotating ring 23. The drive push rod 211 is used as the driving source for the opening and closing of multiple sets of opening and closing plates 27. A battery is provided on the rotating seat ring 22 for powering the drive push rod 211.

[0028] like Figure 1 and Figure 2 As shown, regarding the basic installation method between the base slide rail 11 and the annular seat 21, the base slide rail 11 is provided with two sets of sliders 12. Each slider 12 is provided with a mounting base 14 and a connecting piece 15. The mounting base 14 and the connecting piece 15 are detachably locked together. The annular seat 21 is vertically mounted on the slider 12 via the mounting base 14. Movable push rods 13 are installed at both ends of the base slide rail 11. The telescopic rods of the movable push rods 13 are connected to the sliders 12, thereby realizing the position adjustment and driving of the annular seat 21 on the base slide rail 11.

[0029] In summary, the present invention also has the following combined effects: Synchronous clamping mechanism: The iris clamping mechanism includes a rotating ring 23, opening and closing plates 27, and connecting rods 25, etc., and achieves the synchronous opening and closing of multiple sets of opening and closing plates 27 through a single drive source. The drive push rod 211 pushes the rotating ring 23, and the rotating ring 23 drives the opening and closing plates 27 distributed in a ring array to move through the connecting rods 25, thereby causing all positioning clamps 215 to clamp or release synchronously; Adaptive clamping method: The positioning chuck 215 is installed by a buffer spring 213 and a plug 214, allowing each chuck to move independently and elastically, adapting to the non-uniformity of the shape of the allogeneic bone; The flexible chuck 217 is fixed to both sides of the positioning chuck 215 by the connecting block 216, fits the bone surface, and increases friction with anti-slip texture to ensure stable clamping; Rotation drive mechanism: Two sets of rotating seats 22 clamp the two ends of the bone respectively. The drive motor 28 meshes with the drive ring 210 through the drive wheel 29, driving the rotating seats 22 to rotate, thereby driving the clamped bone to rotate, which facilitates the grinding operation. Position adjustment function: The slider 12 on the base slide rail 11 adjusts its position by moving the push rod 13, thereby adjusting the spacing between the two sets of ring seats 21 to accommodate bones of different lengths; the ring seats 21 are fixed to the slider 12 by the mounting base 14 and the connector 15 to ensure vertical installation.

[0030] The iris clamping mechanism offers high clamping stability. A single drive unit controls multiple clamps, and the adaptive characteristics of the buffer spring 213 ensure that the positioning clamp 215 fits tightly against the surface of irregular bone, reducing wobbling during grinding. The anti-slip texture and symmetrical arrangement of the flexible clamp 217 further increase friction, preventing bone slippage and improving clamping reliability. Operation is simple and efficient. The iris clamping mechanism achieves synchronous movement of multiple clamps through a single drive push rod 211, simplifying the clamping and release process. The drive motor 28 of the rotating seat ring 22 drives the bone... The head is rotatable, facilitating multi-angle grinding and improving grinding efficiency; it is highly adaptable and protective, with a buffer spring 213 and flexible chuck 217 providing elastic cushioning to reduce damage to allogeneic bone; the base slide rail 11 and moving push rod 13 allow adjustment of the clamping position to accommodate bones of different sizes; the structure is reliable and durable: the rotating seat ring 22 and rotating ring 23 cooperate through the positioning rod 26 and positioning hole 24 to ensure the accuracy of the iris clamping mechanism's movement; the drive push rod 211 and drive motor 28 are independently powered for easy operation.

[0031] The embodiments of the present invention have been described above, but the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention, all of which are within the protection scope of the present invention.

Claims

1. An allograft bone reaming clamp device, comprising: Include: Base slide rail (11) and two groups of ring seat (21), two groups of ring seat (21) adjustable slidingly installed on base slide rail (11); The inner ring of the ring seat (21) is rotatably installed with a rotating seat ring (22), the rotating seat ring (22) is provided with an iris clamping mechanism, the iris clamping mechanism comprises a rotating ring (23) and a plurality of opening and closing plates (27), the rotating ring (23) is used for driving the opening and closing action of the plurality of opening and closing plates (27), the opening and closing plate (27) is provided with a mounting bracket (212) at one end close to the axis of the ring seat (21), the mounting bracket (212) is provided with a positioning chuck (215) through a buffer spring (213) and a plug rod (214). A plurality of positioning chucks (215) are used for positioning and clamping the allogeneic bone, and a flexible chuck (217) is further arranged on the positioning chuck (215) and used for stably positioning the allogeneic bone.

2. An allograft bone reaming clamp as in claim 1, wherein, The positioning chucks (215) inside the two rotating seat rings (22) clamp the two ends of the allogeneic bone respectively, and the rotating seat ring (22) drives rotation on the ring seat (21) to realize driving rotation of the allogeneic bone.

3. An allograft bone reaming clamp as in claim 2, wherein, The flexible chucks (217) on the positioning chucks (215) are arranged in the axial direction of the rotating seat ring (22), the flexible chucks (217) are symmetrically arranged on both sides of the positioning chuck (215), when a plurality of positioning chucks (215) clamp the allogeneic bone, anti-skid lines are arranged on the contact surface of the flexible chucks (217) and the allogeneic bone, and a plurality of flexible chucks (217) are also attached to the surface of the allogeneic bone to increase the clamping friction.

4. An allograft bone reaming clamp as in claim 3, wherein, The two sides of the positioning chuck (215) are connected with a connecting block (216), and the flexible chuck (217) is connected to the positioning chuck (215) through the connecting block (216).

5. The device of claim 1, wherein, The opening and closing plate (27) is rotatably installed on the rotating seat ring (22), and a plurality of opening and closing plates (27) are arranged in a ring array, a connecting rod (25) is arranged between the rotating ring (23) and the opening and closing plate (27), one end of the connecting rod (25) is rotatably connected to the opening and closing plate (27), the other end of the connecting rod (25) is rotatably connected to the inner ring of the rotating ring (23), and the rotating ring (23) drives the connecting rod (25) to realize simultaneous opening and closing driving operation of a plurality of opening and closing plates (27).

6. The device of claim 1, wherein, A plurality of positioning rods (26) are arranged on the rotating seat ring (22), a plurality of positioning holes (24) are formed in the rotating ring (23), and the positioning rod (26) is positioned and assembled in the inside of the positioning hole (24).

7. An allograft bone reaming clamp as in claim 6, wherein, The ring seat (21) is provided with a driving motor (28), a driving wheel (29) is arranged on the output shaft of the driving motor (28), a driving ring (210) is arranged on the rotating seat ring (22), the driving wheel (29) and the driving ring (210) are in driving contact, and the driving motor (28) drives the rotating seat ring (22) to rotate through the driving wheel (29) and the ring seat (21).

8. An allograft bone reaming clamp as in claim 7, wherein, The rotation seat ring (22) and the rotation ring (23) are provided with a drive push rod (211), one end of the telescopic rod of the drive push rod (211) is rotatably installed on the rotation seat ring (22), the other end of the drive push rod (211) is rotatably installed on the rotation ring (23), the drive push rod (211) is used for driving the opening and closing of the multiple groups of opening and closing plates (27), and the rotation seat ring (22) is provided with a storage battery for supplying power to the drive push rod (211).

9. The device of claim 1, wherein, The base slide rail (11) is provided with two groups of sliding blocks (12), the sliding blocks (12) are provided with mounting seats (14) and connecting pieces (15), the mounting seats (14) and the connecting pieces (15) are detachably and lockingly mounted, and the circular ring seat (21) is vertically mounted on the sliding blocks (12) through the mounting seats (14).

10. The device of claim 9, wherein the device is configured to be used with a drill press. The base slide rail (11) is provided with two groups of sliding blocks (12), the sliding blocks (12) are provided with mounting seats (14) and connecting pieces (15), the mounting seats (14) and the connecting pieces (15) are detachably and lockingly mounted, and the circular ring seat (21) is vertically mounted on the sliding blocks (12) through the mounting seats (14).

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