Cutting knife rotation control mechanism

Abstract

The utility model belongs to the technical field of medical cutting tools, and particularly relates to a cutting knife rotation control mechanism which comprises a shell, a right end cover and a left end cover are fixedly installed at the two ends of the shell through cylindrical pins respectively, an air inlet pipe is fixedly connected into the left end cover, bearing positioning holes are formed in the right end cover and the left end cover, and the right end cover and the left end cover are fixedly connected with the air inlet pipe. And a cutting knife shaft rod penetrates through the interiors of the bearing positioning holes, a rotor assembly is arranged on the outer side of the middle of the cutting knife shaft rod, deep groove ball bearings are installed on the outer sides of the two ends of the cutting knife shaft rod correspondingly, and the two deep groove ball bearings are fixedly installed in the two bearing positioning holes correspondingly. By means of the eccentric structure, the rotor assembly and the cutter shaft rod can rotate more easily and conveniently, the rotating speed can be rapidly adjusted by controlling the airflow intensity change, and the device is small in number of parts, simple in structure and easy to operate and use.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical cutting tools, in particular to a cutting knife rotation control mechanism. Background Art

[0002] Breast excision is a technique for removing breast lumps. There is a special machine called a breast excision cutter, which is used to quickly remove breast tumors. The cutter requires a rotating control mechanism to drive the rotation.

[0003] After investigating and studying the common rotary cutting knife equipment on the market, it was found that the common rotary cutting knife rotation control mechanisms currently have many problems such as a large number of structural parts, complex structure, and high manufacturing precision. In addition, they are easy to wear and inconvenient to adjust the speed during long-term use. Therefore, it is urgent to improve the existing rotary cutting knife and provide a rotary cutting knife rotation control mechanism. Summary of the invention

[0004] The purpose of the utility model is to provide a cutting knife rotation control mechanism with reasonable design, simple structure, self-lubricating effect, easy rotor rotation and quick speed adjustment to solve the problems existing in the prior art.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A cutting knife rotation control mechanism comprises a shell, wherein a right end cover and a left end cover are respectively fixedly installed at both ends of the shell by cylindrical pins, an air intake pipe is fixedly connected to the interior of the left end cover, bearing positioning holes are opened inside the right end cover and the left end cover, a cutting knife shaft rod passes through the interior of the bearing positioning hole, a rotor assembly is provided on the outer side of the middle part of the cutting knife shaft rod, deep groove ball bearings are installed on the outer sides of both ends of the cutting knife shaft rod, and two deep groove ball bearings are respectively fixedly installed in the two bearing positioning holes.

[0007] As a preferred embodiment, a fish-shaped air outlet cavity is provided at the outer edge of the right end cover, and an exhaust hole is provided at the fish head and the fish tail of the fish-shaped air outlet cavity.

[0008] As a preferred embodiment, a fish-shaped air inlet cavity is provided at the outer edge of the left end cover, and an air inlet hole is provided at the fish head of the fish-shaped air inlet cavity.

[0009] As a preferred implementation, the two bearing locating holes are eccentrically opened inside the right end cover and the left end cover, and the two bearing locating holes are on the same horizontal straight line.

[0010] As a preferred implementation, the right end cover and the left end cover are respectively abutted and sealed against two ends of the shell.

[0011] As a preferred implementation, one end of the air intake pipe is bonded and fixed to the inner side of the air intake hole.

[0012] As a preferred embodiment, the rotor assembly includes a rotor body, blades and a support spring. The rotor body is sleeved on the outer side of the middle part of the cutting knife shaft, and the cutting knife shaft and the rotor body are interference fit. The interior of the rotor body is provided with a plurality of through grooves in a ring shape, and blades are slidably engaged on the inner side of each through groove. A support spring is fixedly connected between the blades and the rotor body.

[0013] As a preferred embodiment, one end of the blade located outside the rotor body slides in contact with the inner wall of the shell, the shell is made of aluminum alloy, and the blade is made of brass.

[0014] In the solution of the utility model:

[0015] Since the bearing positioning holes opened inside the right end cover and the left end cover are eccentrically opened, when the rotor assembly drives the cutting knife shaft to rotate, the blades will be compressed while following the rotation of the rotor body and slide and retract inside the rotor body through the supporting spring, which can play the role of counterweight. By utilizing the existence of the eccentric structure, the rotor assembly and the cutting knife shaft can be made lighter when rotating, and the rotation speed can be quickly adjusted by controlling the change of airflow intensity. The device has a small number of parts, a simple structure, and is easy to operate and use.

[0016] In this structure, the shell is made of aluminum alloy, and the blades are made of brass. Both aluminum alloy and brass are self-lubricating. Moreover, since the melting points of the two are inconsistent and different, adhesion between the materials caused by high-speed friction can be avoided, thereby ensuring the stable operation of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions, and the following description is made with respect to the drawings:

[0018] Figure 1 This is a three-dimensional front view structural diagram of the utility model;

[0019] Figure 2 This is a schematic diagram of the three-dimensional structure of the right end cover of the utility model;

[0020] Figure 3 This is a schematic diagram of the three-dimensional structure of the left end cover of the utility model;

[0021] Figure 4 This is a schematic diagram of the front cross-sectional structure of the utility model;

[0022] Figure 5 It is a schematic diagram of the overall side cross-sectional structure of the rotor assembly of the utility model.

[0023] In the figure:

[0024] 1. Outer shell; 2. Right end cover; 210. Air outlet cavity; 220. Air exhaust hole; 3. Left end cover; 310. Air inlet cavity; 320. Air inlet hole; 4. Cylindrical pin; 5. Bearing positioning hole; 6. Air inlet pipe; 7. Cutting knife shaft; 8. Rotor assembly; 81. Rotor body; 82. Blades; 83. Support spring; 9. Deep groove ball bearing. DETAILED DESCRIPTION

[0025] The embodiments described below are only some of the embodiments of the present invention and do not represent all the embodiments consistent with the present invention. Now, in conjunction with the accompanying drawings, the exemplary embodiments are described as follows:

[0026] like Figure 1-5 As shown, the utility model cutting knife rotation control mechanism comprises a shell 1, and the two ends of the shell 1 are respectively fixedly installed with a right end cover 2 and a left end cover 3 through a cylindrical pin 4, the interior of the left end cover 3 is fixedly connected with an air intake pipe 6, and the right end cover 2 and the left end cover 3 are both provided with bearing positioning holes 5, and the interior of the bearing positioning holes 5 is penetrated by a cutting knife shaft rod 7, and a rotor assembly 8 is provided on the outer side of the middle part of the cutting knife shaft rod 7, and deep groove ball bearings 9 are installed on the outer sides of both ends of the cutting knife shaft rod 7, and the two deep groove ball bearings 9 are respectively fixedly installed in the two bearing positioning holes 5.

[0027] On the basis of the above structure, a fish-shaped air outlet cavity 210 is provided at the outer edge of the right end cover 2 , and an exhaust hole 220 is provided at the fish head and the fish tail of the fish-shaped air outlet cavity 210 .

[0028] In this embodiment, two exhaust holes 220 opened inside the right end cover 2 are utilized to facilitate the normal circulation of air inside the housing 1 .

[0029] On the basis of the above structure, a fish-shaped air inlet cavity 310 is provided at the outer edge of the left end cover 3 , and an air inlet hole 320 is provided at the fish head of the fish-shaped air inlet cavity 310 .

[0030] In this embodiment, the air inlet hole 320 opened inside the left end cover 3 is used to facilitate the fixed installation of the air inlet pipe 6 and the air supply.

[0031] On the basis of the above structure, two bearing positioning holes 5 are eccentrically opened inside the right end cover 2 and the left end cover 3, and the two bearing positioning holes 5 are located on the same horizontal straight line.

[0032] In this embodiment, two bearing positioning holes 5 eccentrically opened inside the right end cover 2 and the left end cover 3 are used to facilitate the eccentric installation of the cutting knife shaft 7 and the rotor assembly 8 inside the housing 1, so that the rotor assembly 8 and the cutting knife shaft 7 can be more lightweight when rotating.

[0033] On the basis of the above structure, the right end cover 2 and the left end cover 3 are respectively in contact and sealed with the two ends of the housing 1 .

[0034] In this embodiment, the two ends of the housing 1 are sealed by the right end cover 2 and the left end cover 3, so that the sealing can be ensured, and the rotation of the cutting blade shaft 7 and the rotor assembly 8 can be stably controlled under the action of airflow.

[0035] On the basis of the above structure, one end of the air intake pipe 6 is bonded and fixed to the inner side of the air intake hole 320 .

[0036] In this embodiment, one end of the air inlet pipe 6 is inserted into the air inlet hole 320 and fixed with glue to make the two sealed, which facilitates stable air supply.

[0037] Based on the above structure, the rotor assembly 8 includes a rotor body 81, blades 82 and a support spring 83. The rotor body 81 is sleeved on the outer side of the middle part of the cutting knife shaft 7, and the cutting knife shaft 7 is interference fit with the rotor body 81. The interior of the rotor body 81 is provided with a plurality of through grooves in a ring shape, and a blade 82 is slidably engaged on the inner side of each through groove. A support spring 83 is fixedly connected between the blade 82 and the rotor body 81.

[0038] In this embodiment, the blades 82 are compressed while rotating with the rotor body 81 and slide and retract inside the rotor body 81 through the support springs 83, which can play the role of counterweight. The eccentric structure can make the rotor assembly 8 and the cutting knife shaft 7 lighter when rotating.

[0039] On the basis of the above structure, one end of the blade 82 located outside the rotor body 81 slides in contact with the inner wall of the shell 1 . The shell 1 is made of aluminum alloy, and the blade 82 is made of brass.

[0040] In this embodiment, both the aluminum alloy and the brass materials have the characteristic of self-lubrication, and because the melting points of the two are inconsistent, adhesion between the materials caused by high-speed friction can be avoided.

[0041] The working principle of the utility model is as follows:

[0042] When in use, firstly, the air inlet pipe 6 is used to supply air to the inside of the housing 1 through the air inlet hole 320, and the rotor assembly 7 is controlled to drive the cutting knife shaft 8 to rotate. Since the bearing positioning holes 5 opened inside the right end cover 2 and the left end cover 3 are eccentrically opened, Figure 5As shown in the figure, when the blade 82 rotates with the rotor body 81, it will be squeezed by the shell 1 and slide and retract inside the rotor body 81 through the support spring 83, which can play a counterweight effect. In addition, the existence of the eccentric structure can make the rotor assembly 8 and the cutting knife shaft 7 lighter when rotating, and the speed can be quickly adjusted by controlling the change of airflow intensity. At the same time, deep groove ball bearings 9 are installed in the two bearing positioning holes 5, which can improve the smoothness and stability of the rotation. The device has a small number of parts, a simple structure, and is easy to operate and use.

[0043] The shell 1 is made of aluminum alloy, and the blades 82 are made of brass. Both aluminum alloy and brass are self-lubricating. In addition, since their melting points are inconsistent and different, adhesion between the materials caused by high-speed friction generated by rotation can be avoided, thereby ensuring the stable operation of the structure.

[0044] The above are only preferred specific embodiments of the utility model and are not intended to limit the protection scope of the utility model; any equivalent changes, modifications, substitutions and variations made by technicians in this technical field based on the concept of the utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology should be within the protection scope determined by the claims.

Claims

1. A cutting blade rotation control mechanism, comprising a housing (1), characterized in that: A right end cover (2) and a left end cover (3) are respectively fixedly mounted on both ends of the housing (1) via cylindrical pins (4); an air intake pipe (6) is fixedly connected to the interior of the left end cover (3); a bearing positioning hole (5) is provided inside the right end cover (2) and the left end cover (3); a cutting knife shaft rod (7) passes through the interior of the bearing positioning hole (5); a rotor assembly (8) is provided on the outer side of the middle of the cutting knife shaft rod (7); deep groove ball bearings (9) are installed on the outer sides of both ends of the cutting knife shaft rod (7); and two deep groove ball bearings (9) are respectively fixedly mounted in the two bearing positioning holes (5).

2. A cutting blade rotation control mechanism according to claim 1, characterized in that: A fish-shaped air outlet cavity (210) is provided at the outer edge of the right end cover (2), and an exhaust hole (220) is provided at the head and tail of the fish-shaped air outlet cavity (210).

3. A cutting blade rotation control mechanism according to claim 1, characterized in that: A fish-shaped air intake cavity (310) is provided at the outer edge of the left end cover (3), and an air intake hole (320) is provided at the fish head of the fish-shaped air intake cavity (310).

4. A cutting blade rotation control mechanism according to claim 1, characterized in that: The two bearing positioning holes (5) are both eccentrically opened inside the right end cover (2) and the left end cover (3), and the two bearing positioning holes (5) are located on the same horizontal straight line.

5. The cutting blade rotation control mechanism according to claim 1, characterized in that: The right end cover (2) and the left end cover (3) are respectively in contact and sealed with the two ends of the outer shell (1).

6. A cutting blade rotation control mechanism according to claim 3, characterized in that: One end of the air intake pipe (6) is bonded and fixed to the inner side of the air intake hole (320).

7. The cutting blade rotation control mechanism according to claim 1, characterized in that: The rotor assembly (8) comprises a rotor body (81), blades (82) and a support spring (83); the rotor body (81) is sleeved on the outer side of the middle portion of the cutting knife shaft (7), and the cutting knife shaft (7) and the rotor body (81) are interference fit; a plurality of through grooves are provided in an annular shape inside the rotor body (81); a blade (82) is slidably engaged on the inner side of each through groove; and a support spring (83) is fixedly connected between the blade (82) and the rotor body (81).

8. A cutting blade rotation control mechanism according to claim 7, characterized in that: One end of the blade (82) located outside the rotor body (81) fits and slides against the inner wall of the outer shell (1); the outer shell (1) is made of aluminum alloy, and the blade (82) is made of brass.

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