Medical planing grinding head

Abstract

The utility model relates to a medical planing grinding head and relates to the field of medical instruments, the medical planing grinding head comprises an inner knife and an outer knife, the inner knife comprises an inner knife head, an inner knife rod and an inner knife handle, the outer knife comprises an outer knife head, an outer knife rod and an outer knife handle, the inner knife rod is inserted into the outer knife rod, a groove is formed in one end of the outer knife handle, and the outer knife handle is inserted into the groove. One end of the inner cutter handle is inserted into the groove, the side face, provided with the groove, of the outer cutter handle is a contact face, the side face, close to the contact face, of the inner cutter handle is a contact face, and the inner cutter handle is connected with a driving motor driving the inner cutter handle to rotate relative to the outer cutter handle. And a ball bearing is arranged between the first contact surface and the second contact surface. The surgical knife has the advantages that the situation that the inner knife and the outer knife are locked is reduced, and normal operation can be guaranteed.

Description

Technical Field

[0001] The present application relates to the field of medical instruments, and in particular to a medical planing grinding head. Background Art

[0002] With the advancement of medical technology, minimally invasive technology is being used more and more widely. Minimally invasive technology is a technology that achieves the best surgical effect with minimal invasion and minimal physiological interference. It has the advantages of small surgical incisions and short recovery time. In minimally invasive surgery, using a planer to remove diseased tissue has unique advantages.

[0003] Reference Figure 1 The planing grinding head in the related art includes an outer knife handle 23 and an outer knife rod 22 fixed at one end of the outer knife handle 23, and also includes an inner knife handle 13 and an inner knife rod 12 fixed at one end of the inner knife handle 13, the inner knife rod 12 is plugged into the outer knife rod 22, and one end of the outer knife handle 23 is provided with a groove 231 for plugging one end of the inner knife handle 13, and during operation, the motor drives the inner knife handle 13 to rotate relative to the outer knife handle 23. A contact surface 5 is provided on the outer knife handle 23, and a contact second surface 6 is provided on the inner knife handle 13, and the contact surface 5 and the contact second surface 6 are in contact with each other.

[0004] During operation, the motor drives the inner knife handle 13 to rotate relative to the outer knife handle 23. At this time, the contact surface 5 and the contact surface 6 contact each other and friction will occur, thereby generating a large amount of heat. The inner knife handle 13 and the outer knife handle 23 may melt and lock, affecting the normal progress of the operation. Utility Model Content

[0005] In order to reduce the occurrence of the inner blade and the outer blade being stuck and ensure that the operation can be carried out normally, the present application provides a medical planing grinding head.

[0006] The medical planing grinding head provided in this application adopts the following technical solution:

[0007] A medical planing grinding head comprises an inner knife and an outer knife, wherein the inner knife comprises an inner knife head, an inner knife rod and an inner knife handle, and the outer knife comprises an outer knife head, an outer knife rod and an outer knife handle, wherein the inner knife rod is inserted into the inner part of the outer knife rod, one end of the outer knife handle is provided with a groove, and one end of the inner knife handle is inserted into the groove, a side surface of the outer knife handle provided with the groove is a contact surface, and a side surface of the inner knife handle close to the contact surface is a second contact surface, a driving motor for driving the inner knife handle to rotate relative to the outer knife handle is connected to the inner knife handle, and a ball bearing is installed between the contact surface and the second contact surface.

[0008] By adopting the above technical solution, when working, the driving motor is started to drive the inner knife handle to rotate relative to the outer knife handle, and at this time, the contact surface rotates relative to the second contact surface. Since a ball bearing is installed between the contact surface and the second contact surface, the sliding friction between the contact surface and the second contact surface becomes rolling friction. The heat generated by the friction between the contact surface and the second contact surface is greatly reduced, the occurrence of hot melting problems in the planing grinding head is reduced, and the occurrence of locking of the inner knife and the outer knife is reduced, ensuring that the operation can be carried out normally.

[0009] Preferably, the ball bearing is a thrust ball bearing, which includes a retaining ring 1 fixedly mounted on one contact surface, and a retaining ring 2 fixedly mounted on the second contact surface, and a retaining frame with a plurality of steel balls is installed between the retaining ring 1 and the retaining ring 2.

[0010] By adopting the above technical solution and setting the thrust ball bearing, the contact one surface and the contact two surfaces can slide relative to each other more easily.

[0011] Preferably, stabilizing grooves are provided on the one contact surface and the second contact surface, and a limiting groove is provided on the side wall of each stabilizing groove, which runs through one side of the opening of the stabilizing groove. The side walls of retaining ring one and retaining ring two are fixedly connected with limiting blocks, retaining ring one has an interference fit with the stabilizing groove on the one contact surface and the limiting block on retaining ring one is plugged into the corresponding limiting groove, and retaining ring two has an interference fit with the stabilizing groove on the second contact surface and the limiting block on retaining ring two is plugged into the corresponding limiting groove.

[0012] By adopting the above technical solution, both retaining ring 1 and retaining ring 2 are interference fit with the corresponding stabilizing groove, which makes the installation method of the thrust ball bearing relatively simple, and the insertion of the limiting block and the limiting groove further limits the rotation of retaining ring 1 and retaining ring 2.

[0013] Preferably, it also includes a host handle, the drive motor is embedded in and fixed in the host handle, one end of the host handle is provided with a mounting groove, the end of the outer knife handle provided with a groove is inserted into the mounting groove, and at least one fixing component is installed on the outer knife handle to lock the outer knife handle with the host handle.

[0014] By adopting the above technical solution, the main machine handle covers the outside of the drive motor, thereby protecting the drive motor, and the outer knife handle is detachably connected to the main machine handle through a fixing component, which is convenient for maintenance or replacement of the inner knife and the outer knife.

[0015] Preferably, the fixing assembly includes a tough block with one end fixed to the side of the outer knife handle, the other end of the tough block is disengaged from the outer knife handle and is provided with a clamping block, an elastic block is fixedly connected between the tough block and the outer knife handle, the side of the tough block facing away from the outer knife handle is provided with a protrusion, the outer side surface of the main handle is provided with a limiting opening connected to the mounting groove, the limiting opening passes through the main handle along the length direction of the outer knife rod in the direction away from the bottom wall of the mounting groove, the protrusion is plugged into the limiting opening, the inner side wall of the mounting groove is provided with a clamping groove, and the clamping block is clamped into the clamping groove.

[0016] By adopting the above technical solution, the protrusion is pressed toward the direction close to the outer knife handle, and the protrusion drives the tough block to move toward the direction close to the outer knife handle. The movement of the tough block presses the elastic block, and the elastic block is deformed. The movement of the tough block drives the clamping block to gradually move away from the clamping groove and disengage from the clamping groove, and then pulls the protrusion and the outer knife handle away from the installation groove until the outer knife handle is disengaged from the installation groove. In this process, the protrusion gradually disengages from the limit opening at one end away from the bottom wall of the installation groove, and the disassembly of the outer knife and the host handle is completed.

[0017] When the external knife needs to be installed on the main machine handle, the protrusion is pressed toward the external knife handle, and the external knife handle is gradually inserted toward the installation slot, and the protrusion is gradually inserted into the limit opening, and the clamping block is aligned with the clamping slot. At this time, the protrusion is released, and the toughness block moves away from the external knife handle under the elastic block and its own elastic force until the clamping block is plugged into the clamping slot, thus completing the installation of the external knife handle and the main machine handle, and the operation is simple and convenient.

[0018] Preferably, a side surface of the clamping block facing away from the bottom wall of the installation groove is arranged perpendicular to the length direction of the outer knife rod, and the shape of the clamping groove matches that of the clamping block.

[0019] By adopting the above technical solution, when the clamping block is clamped with the clamping slot, a side surface of the clamping block arranged perpendicular to the length direction of the outer knife rod better restricts the clamping block from leaving the clamping slot, thereby strengthening the connection between the outer knife and the host handle.

[0020] Preferably, a locking groove is provided on a side of the inner knife handle close to the driving motor, and at least one connecting hole connected to the locking groove is provided on the outer wall of the inner knife handle. The connecting hole extends toward an end close to the driving motor and passes through the inner knife handle. The output shaft of the driving motor is plugged into the locking groove, and an insert block plugged into the connecting hole is fixedly connected to the output shaft of the driving motor.

[0021] By adopting the above technical solution, the plug block on the output shaft of the driving motor is inserted into the connecting hole from one end of the connecting hole. In this way, when the driving motor rotates, the output shaft tube plug block of the driving motor drives the inner knife handle to rotate, and the connection between the output shaft of the driving motor and the inner knife is relatively simple.

[0022] Preferably, a spring in a compressed state is provided in the locking groove, one end of the spring abuts against the bottom wall of the locking groove, and the other end of the spring abuts against the output shaft of the driving motor.

[0023] By adopting the above technical solution, the compressed spring applies a force to the inner knife handle toward the outer knife handle, that is, applies a force to move the two contact surfaces toward the one contact surface, thereby facilitating a more stable connection between the inner knife and the outer knife.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] 1. Reduce the occurrence of hot melting problems in the planing and grinding heads, reduce the occurrence of internal and external knife locking, and ensure that the operation can proceed normally;

[0026] 2. The setting of the thrust ball bearing makes it easier for the contact surface and the contact surface to slide relative to each other;

[0027] 3. It facilitates a more stable connection between the inner knife and the outer knife. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram embodying the relevant technology.

[0029] Figure 2 It is a schematic diagram of the overall structure of the planing grinding head according to an embodiment of the present application.

[0030] Figure 3 It is a schematic diagram of the structure of the fixing component embodied in an embodiment of the present application.

[0031] Figure 4 It is a manifestation Figure 3 Enlarged view of point A in the middle.

[0032] Figure 5 It is a schematic diagram of the structure of the connection hole embodied in an embodiment of the present application.

[0033] Explanation of the reference numerals in the accompanying drawings: 1. Inner knife; 11. Inner knife head; 12. Inner knife rod; 13. Inner knife handle; 131. Locking groove; 132. Connecting hole; 2. Outer knife; 21. Outer knife head; 22. Outer knife rod; 23. Outer knife handle; 231. Groove; 3. Driving motor; 31. Insert block; 4. Main machine handle; 41. Mounting groove; 42. Limiting opening; 43. Snap-in groove; 5. Contact one side; 51. Stabilizing groove; 52. Limiting groove; 6. Contact two sides; 7. Thrust ball bearing; 71. Retaining ring one; 72. Retaining ring two; 73. Retaining frame; 74. Limiting block; 8. Fixing assembly; 81. Toughness block; 82. Snap-in block; 83. Elastic block; 84. Protrusion; 9. Spring. DETAILED DESCRIPTION

[0034] The following is combined with Figure 2-Figure 5 This application is described in further detail.

[0035] The present application embodiment discloses a medical planing grinding head, referring to Figure 2 and Figure 3 The planing grinding head includes an inner cutter 1, an outer cutter 2, a driving motor 3 and a main machine handle 4. The inner cutter 1 is composed of an inner cutter head 11, an inner cutter rod 12 and an inner cutter handle 13, and the outer cutter 2 is composed of an outer cutter head 21, an outer cutter rod 22 and an outer cutter handle 23. The inner cutter rod 12 is inserted into the outer cutter rod 22 to form a close matching relationship.

[0036] A groove 231 is provided at one end of the handle of the outer knife 2, and one end of the inner knife handle 13 is inserted into the groove 231, so that the inner knife 1 can stably rotate inside the outer knife 2. The side of the outer knife handle 23 with the groove 231 is defined as the contact surface 5, and the side of the inner knife handle 13 close to the contact surface 5 is defined as the second contact surface 6. The output shaft of the drive motor 3 is connected to the inner knife handle 13, and is used to drive the inner knife handle 13 to rotate relative to the outer knife handle 23.

[0037] Reference Figure 3 and Figure 4 A thrust ball bearing 7 is installed between the contact surface 5 and the second contact surface 6. The thrust ball bearing 7 includes a retaining ring 1 71, a retaining ring 2 72 and a retaining frame 73 with a plurality of steel balls. A stabilizing groove 51 is provided on both the contact surface 5 and the second contact surface 6. The retaining ring 1 71 is plugged into and interference fit with the stabilizing groove 51 on the contact surface 5. The retaining ring 2 72 is plugged into and interference fit with the stabilizing groove 51 on the second contact surface 6.

[0038] In order to strengthen the installation of the thrust ball bearing 7, a limiting groove 52 is opened on the side wall of each stabilizing groove 51, and the limiting groove 52 passes through one end of the opening of the stabilizing groove 51. The side wall of the retaining ring 1 71 and the side wall of the retaining ring 2 72 are fixedly connected with a limiting block 74, and each limiting block 74 is plugged into the corresponding limiting groove 52.

[0039] Reference Figure 3 and Figure 5 The drive motor 3 is embedded and fixed inside the main body handle 4, so it is effectively protected. One end of the main body handle 4 is provided with a mounting groove 41, and one end of the outer knife handle 23 provided with a groove 231 is inserted into the mounting groove 41. In order to ensure a stable connection between the outer knife handle 23 and the main body handle 4, at least one fixing component 8 is also installed on the outer knife handle 23, and the fixing component 8 is used to complete the locking between the outer knife 2 and the main body handle 4.

[0040] The fixing assembly 8 includes a tough block 81, one end of which is fixedly connected to the outer side wall of the outer knife handle 23, and the other end is provided with a clamping block 82, which is out of contact with the outer knife handle 23. An elastic block 83 is fixedly connected to the gap between the tough block 81 and the outer knife handle 23, and a protrusion 84 is provided on the side of the tough block 81 facing away from the outer knife handle 23.

[0041] The outer side of the host handle 4 is provided with a limit opening 42, which is communicated with the installation groove 41, and the limit block passes through the host handle 4 in the direction away from the bottom wall of the installation groove 41, and the protrusion 84 is plugged into the limit opening 42. The inner side wall of the installation groove 41 is provided with a clamping groove 43, the shape of which is adapted to the shape of the clamping block 82, and the side of the clamping block 82 away from the bottom wall of the installation groove 41 is vertically upwardly arranged, and the clamping block 82 is clamped with the clamping groove 43.

[0042] Press the protrusion 84 downward, and the protrusion 84 drives the tough block 81 to squeeze the elastic block 83 in the direction close to the outer knife handle 23. At this time, the tough block 81 drives the clamping block 82 to gradually disengage from the clamping groove 43. The protrusion 84 and the outer knife handle 23 are pulled away from the installation groove 41 to complete the disassembly of the outer knife 2.

[0043] A locking groove 131 is provided on one side of the inner knife handle 13 close to the driving motor 3, and four connecting holes 132 are provided on the outer wall of the inner knife handle 13, each connecting hole 132 is communicated with the locking groove 131, and each connecting hole 132 passes through the inner knife handle 13 from the opening of the locking groove 131. Two plug blocks 31 are fixedly connected to the output shaft of the driving motor 3, each plug block 31 is plugged into a corresponding one of the connecting holes 132, and the output shaft of the driving motor 3 is plugged into the locking groove 131.

[0044] A spring 9 is arranged in the locking groove 131, one end of the spring 9 abuts against the bottom wall of the locking groove 131, and the other end abuts against the output shaft of the driving motor 3. The elasticity is in a compressed state, thereby exerting a force on the inner knife 1 to move toward the outer knife 2, so as to facilitate the stable installation between the inner knife 1 and the outer knife 2.

[0045] The implementation principle of a medical planing grinding head in an embodiment of the present application is: start the drive motor 3, and the drive motor 3 drives the inner knife handle 13 to rotate relative to the outer knife handle 23. At this time, the contact one surface 5 and the contact second surface 6 become rolling friction under the cooperation of the thrust ball bearing 7, and the contact one surface 5 and the contact second surface 6 can rotate relatively smoothly, and the compressed spring 9 ensures the stability of the installation between the inner knife 1 and the outer knife 2.

[0046] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A medical planing grinding head, comprising an inner knife (1) and an outer knife (2), wherein the inner knife (1) comprises an inner knife head (11), an inner knife rod (12) and an inner knife handle (13), and the outer knife (2) comprises an outer knife head (21), an outer knife rod (22) and an outer knife handle (23), wherein the inner knife rod (12) is inserted into the inner part of the outer knife rod (22), one end of the handle of the outer knife (2) is provided with a groove (231), one end of the inner knife handle (13) is inserted into the inner part of the groove (231), a side surface of the outer knife handle (23) provided with the groove (231) is a contact surface (5), and a side surface of the inner knife handle (13) close to the contact surface (5) is a second contact surface (6), and a driving motor (3) is connected to the inner knife handle (13) for driving the inner knife handle (13) to rotate relative to the outer knife handle (23), characterized in that: A ball bearing is installed between the one contact surface (5) and the second contact surface (6).

2. A medical planing grinding head according to claim 1, characterized in that: The ball bearing is a thrust ball bearing (7), which comprises a retaining ring (71) fixedly mounted on the contact surface (5), and a retaining ring (72) fixedly mounted on the contact surface (6), wherein a retaining frame (73) provided with a plurality of steel balls is mounted between the retaining ring (71) and the retaining ring (72).

3. A medical planing grinding head according to claim 2, characterized in that: The one contact surface (5) and the second contact surface (6) are both provided with a stabilizing groove (51), and the side wall of each stabilizing groove (51) is provided with a limiting groove (52), the limiting groove (52) passes through one side of the opening of the stabilizing groove (51), and the side walls of the first retaining ring (71) and the second retaining ring (72) are both fixedly connected with limiting blocks (74), the first retaining ring (71) and the stabilizing groove (51) on the one contact surface (5) are interference fit, and the limiting blocks (74) on the first retaining ring (71) are plugged into the corresponding limiting groove (52), and the second retaining ring (72) and the stabilizing groove (51) on the second contact surface (6) are interference fit, and the limiting blocks (74) on the second retaining ring (72) are plugged into the corresponding limiting groove (52).

4. A medical planing grinding head according to claim 1, characterized in that: The device further comprises a main machine handle (4), the driving motor (3) being embedded in and fixed to the main machine handle (4), one end of the main machine handle (4) being provided with a mounting groove (41), one end of the external knife handle (23) being provided with a groove (231) being inserted into the mounting groove (41), and at least one fixing component (8) for locking the external knife handle (23) and the main machine handle (4) being installed on the external knife handle (23).

5. A medical planing grinding head according to claim 4, characterized in that: The fixing assembly (8) comprises a tough block (81) having one end fixed to a side surface of the outer knife handle (23); the other end of the tough block (81) is detached from the outer knife handle (23) and provided with a clamping block (82); an elastic block (83) is fixedly connected between the tough block (81) and the outer knife handle (23); a protrusion (84) is provided on the side of the tough block (81) facing away from the outer knife handle (23); a limiting opening (42) communicating with the mounting groove (41) is provided on the outer side surface of the host handle (4); the limiting opening (42) penetrates the host handle (4) along the length direction of the outer knife rod (22) in a direction away from the bottom wall of the mounting groove (41); the protrusion (84) is plugged into the limiting opening (42); an inner side wall of the mounting groove (41) is provided with a clamping groove (43); and the clamping block (82) is clamped into the clamping groove (43).

6. A medical planing grinding head according to claim 5, characterized in that: A side surface of the clamping block (82) facing away from the bottom wall of the installation groove (41) is arranged perpendicular to the length direction of the outer knife rod (22), and the shape of the clamping groove (43) matches that of the clamping block (82).

7. The medical planing grinding head according to claim 4, characterized in that: A locking groove (131) is formed on a side surface of the inner knife handle (13) close to the drive motor (3); at least one connecting hole (132) connected to the locking groove (131) is formed on an outer wall of the inner knife handle (13); the connecting hole (132) extends toward an end close to the drive motor (3) and passes through the inner knife handle (13); an output shaft of the drive motor (3) is plugged into the locking groove (131); and an insert block (31) plugged into the connecting hole (132) is fixedly connected to the output shaft of the drive motor (3).

8. The medical planing grinding head according to claim 7, characterized in that: A spring (9) in a compressed state is arranged in the locking groove (131), one end of the spring (9) abuts against the bottom wall of the locking groove (131), and the other end abuts against the output shaft of the drive motor (3).

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