CN216908056U - Connecting structure of inner knife assembly and outer knife assembly and medical knife - Google Patents
Connecting structure of inner knife assembly and outer knife assembly and medical knife Download PDFInfo
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- CN216908056U CN216908056U CN202120648506.9U CN202120648506U CN216908056U CN 216908056 U CN216908056 U CN 216908056U CN 202120648506 U CN202120648506 U CN 202120648506U CN 216908056 U CN216908056 U CN 216908056U
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Abstract
The utility model provides a connecting structure of an inner cutter assembly and an outer cutter assembly and a medical cutter, comprising the outer cutter assembly and the inner cutter assembly, wherein the inner cutter assembly comprises an inner cutter tube and a supporting component which is connected with the inner cutter tube and transmits torsion, the inner cutter tube is rotatably sleeved in the outer cutter assembly, a rolling body is arranged between the supporting component and the outer cutter assembly, and rolling friction is formed between the rolling body and the outer cutter assembly and/or between the rolling body and the supporting component; the medical cutter is provided with a connecting structure of an inner cutter component and an outer cutter component. Rolling friction is formed between the rolling body and the outer cutter assembly and/or between the rolling body and the supporting component, so that friction force is reduced, rotation of the inner cutter assembly is facilitated, heat generated by friction is reduced, the service lives of the outer cutter assembly, the rolling body and the inner cutter assembly are prolonged, the use reliability of the medical cutter is improved, and cost is saved.
Description
Technical Field
The utility model belongs to the field of medical instruments, and particularly relates to a connecting structure of an inner knife assembly and an outer knife assembly and a medical knife.
Background
With the development of medical technology, medical cutters such as abrasive drills, planing tools and the like are widely applied to surgical operations, the medical cutters mainly comprise handles and cutters, the cutters mainly comprise outer cutter assemblies and inner cutter assemblies, the inner cutter assemblies of the cutters are driven to rotate at high speed by the aid of power connected to the handles, and tissues are ground through working portions of the cutters. In prior art, the gasket that directly adopts plastic gasket or other materials between the interior sword subassembly of cutter and the outer sword subassembly carries out the transition and supports, contact mode between interior sword subassembly/outer sword subassembly and the gasket is the face-to-face contact, including sword subassembly and the relative rotation in-process of outer sword subassembly, can produce very big frictional force with the gasket, not only be unfavorable for the rotation of interior sword subassembly and outer sword subassembly, still can produce a large amount of heats simultaneously and damage interior sword subassembly, outer sword subassembly or gasket, thereby reduce life, and the cost is increased.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a connection structure for an inner blade assembly and an outer blade assembly, so as to reduce friction when the inner blade assembly and the outer blade assembly rotate relatively, thereby reducing heat of friction, improving the service life of a medical knife and reducing cost.
In order to achieve the above and other related objects, the present invention provides a connecting structure for an inner cutter assembly and an outer cutter assembly, including an outer cutter assembly and an inner cutter assembly, where the inner cutter assembly includes an inner cutter tube and a supporting member connected to the inner cutter tube and transmitting torque, the inner cutter tube is rotatably sleeved in the outer cutter assembly, a rolling element is disposed between the supporting member and the outer cutter assembly, and rolling friction is formed between the rolling element and the outer cutter assembly and/or between the rolling element and the supporting member.
Optionally, the outer blade assembly is located in front of the support member, and the rolling body is disposed between a front end surface of the support member and a rear end surface of the outer blade assembly.
Optionally, a retainer is arranged between the front end face of the supporting member and the rear end face of the outer cutter assembly, a mounting hole for mounting a rolling body is formed in the retainer, the rolling body is rotatably mounted in the mounting hole, and the rolling body is in contact with the front end face of the supporting member and the rear end face of the outer cutter assembly respectively.
Optionally, the front end surface of the supporting member is provided with a mounting groove, and the rolling element is mounted in the mounting groove and contacts with the rear end surface of the outer cutter assembly; or the rear end face of the outer cutter component is provided with a mounting groove, and the rolling body is mounted in the mounting groove and is in contact with the front end face of the supporting component.
Optionally, the rolling bodies are at least three metal balls and are distributed along the circumferential direction of the inner cutter tube.
Optionally, the support component comprises a support body for receiving the torque force and a connecting seat connected with the front part of the support body, and the connecting seat is sleeved outside the inner cutter tube and is circumferentially fixed with the inner cutter tube; the retainer is arranged on the connecting seat.
Optionally, the retainer is of an annular structure, the retainer is sleeved outside the connecting seat and can rotate circumferentially relative to the connecting seat, and a limiting structure used for limiting the axial position of the retainer is arranged on the connecting seat.
Optionally, the mounting hole is a through hole axially penetrating through the holder along the inner cutter tube, the rolling body is exposed out of two ends of the mounting hole, and the diameter of one end of the mounting hole close to the outer cutter assembly is smaller than that of the rolling body so as to limit the rolling body from being separated from the holder.
Optionally, the cage is made of a resilient non-metallic material.
The utility model also provides a medical cutter which comprises a connecting structure of the inner cutter component and the outer cutter component.
As described above, the connection structure of the inner knife assembly and the outer knife assembly and the medical knife according to the present invention have the following advantages: rolling friction is formed between the rolling body and the outer cutter assembly and/or between the rolling body and the supporting component, so that friction force is reduced, rotation of the inner cutter assembly is facilitated, heat generated by friction is reduced, the service lives of the outer cutter assembly, the rolling body and the inner cutter assembly are prolonged, the use reliability of the medical cutter is improved, and cost is saved.
Drawings
FIG. 1 is a schematic structural diagram of one embodiment of the present invention;
FIG. 2 is an exploded view of one embodiment of the present invention;
FIG. 3 is an enlarged sectional view taken at point I in FIG. 1;
FIG. 4 is an axial view of a cage according to an embodiment of the present invention;
FIG. 5 is a cross-sectional view of an inner blade assembly according to one embodiment of the present invention;
FIG. 6 is a cross-sectional view of an inner blade assembly according to another embodiment of the present invention;
fig. 7 is a cross-sectional view of an inner blade assembly in accordance with yet another embodiment of the present invention.
Part number description:
1-an outer cutter assembly; 1 a-the rear end face of the outer cutter assembly; 2-a cage; 2 a-mounting holes; 2 b-a limit boss; 3-rolling elements; 4-inner cutter assembly; 41-a support member; 41 a-front end face of the support member; 411-a connecting seat; 411 a-limit structure; 411 b-a mounting groove; 412-a support; 412 a-a second mounting groove; 42-inner knife pipe.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
In this example, the side of the medical knife facing the patient when in use is the front side, and the side of the medical knife facing away from the patient is the rear side.
As shown in fig. 1-3, the connecting structure for the inner cutter assembly and the outer cutter assembly in this embodiment includes an outer cutter assembly 1 and an inner cutter assembly 4, wherein the inner cutter assembly 4 includes an inner cutter tube 42 and a supporting member 41, and the supporting member 41 is connected to the inner cutter tube 42 and can rotate synchronously to transmit torque force from a power handle to the inner cutter tube 42, so as to drive the inner cutter tube 42 to rotate and grind; the outer cutter component 1 is sleeved outside the inner cutter tube 42, and the outer cutter component and the inner cutter tube can rotate relatively in the circumferential direction; the key point is that: a rolling body 3 is arranged between the supporting component 41 and the outer cutter assembly 1, rolling friction is formed between the rolling body 3 and the outer cutter assembly 1 or between the rolling body 3 and the supporting component 41, or the rolling body 3 and the outer cutter assembly 1 and the supporting component 41 respectively form rolling friction; through rolling friction formed between the rolling body 3 and the outer cutter assembly 1 and/or between the rolling body 3 and the supporting part 41, on one hand, sliding friction is changed into rolling friction, on the other hand, contact area is reduced, friction force is reduced, rotation of the inner cutter assembly 4 is facilitated, heat generated by friction is reduced, service lives of the outer cutter assembly 1, the rolling body 3 and the inner cutter assembly 4 are prolonged, and cost is saved. The rolling element 3 may be a sphere, a ring with a circular cross section, or other members capable of forming rolling friction with the outer blade assembly 1 or/and the supporting component 41, and may be selected according to specific requirements.
The inner cutter tube 42 and the supporting part 41 can be connected by welding, bonding, screwing or other forms of detachable fixed connection, and the supporting part 41 is connected with the inner cutter tube 42 and transmits torque, which means that the supporting part 41 and the outer cutter tube 42 are connected together and can synchronously rotate, so that the inner cutter tube 42 can rotate along with the supporting part 41 by driving the supporting part 41 to rotate.
In the present embodiment, the supporting member 41 is connected to the rear of the inner blade tube 42, the outer blade assembly 1 is located in front of the supporting member 41, that is, the front end surface 41a of the supporting member 41 is opposite to the rear end surface 1a of the outer blade assembly, and the rolling elements 3 are disposed between the front end surface 41a of the supporting member 41 and the rear end surface 1a of the outer blade assembly; by arranging the rolling body 3 between the front end surface 41a of the supporting component and the rear end surface 1a of the outer cutter assembly, compared with the traditional mode of adopting a gasket, the friction area and the friction force during relative rotation are reduced, and the heat generated by friction is reduced; the installation mode of the rolling body 3 can be installed by arranging a retainer, or installation grooves for installing the rolling body 3 are formed in the outer cutter assembly 1 and the supporting component 41, and can be selected according to specific requirements.
As shown in fig. 2-4, in the present embodiment, a retainer 2 is disposed between the front end surface 41a of the support member and the rear end surface 1a of the outer blade assembly, a mounting hole 2a for mounting a rolling body 3 is disposed in the retainer 2, the rolling body 3 is rotatably mounted in the mounting hole 2a, and the rolling body 3 contacts with the front end surface 41a of the support member and the rear end surface 1a of the outer blade assembly; the rolling body 3 is arranged by the retainer 2, so that the rolling device has the advantages of simple structure, reduction in processing difficulty, improvement in assembly efficiency and the like; by rotatably mounting the rolling body 3 in the mounting hole 2a, when the outer cutter unit 1 and the support member 41 rotate relatively, the rolling body 3 can roll in the mounting hole 2a, so that rolling friction is formed between the rolling body 3 and the front end surface 41a of the support member and between the rolling body 3 and the rear end surface 1a of the outer cutter unit, respectively.
The holder 2 can be fixedly arranged on the outer cutter assembly 1 or the supporting component 41, and the holder 2 can also be arranged on the outer cutter assembly 1 or the supporting component 41 in a way of rotating relative to the inner cutter tube 42 in the circumferential direction.
In this embodiment, the rolling bodies 3 are metal balls, such as steel balls (or called balls), iron balls, and the like, and the number of the metal balls is at least three, and the metal balls are distributed along the circumferential direction of the inner cutter tube 42; the steel ball is adopted in the embodiment, so that the steel ball has the advantages of simple structure, convenience in production and manufacturing and low cost; the number of the steel balls can be three, four or other numbers, and the number of the steel balls is four, so that the reliability of the rotation of the supporting part 41 can be improved under the condition that the number of the steel balls is not increased. The steel balls are uniformly distributed along the circumferential direction of the inner cutter tube 42 and also can be non-uniformly distributed along the circumferential direction of the inner cutter tube 42, and preferably, the steel balls are uniformly distributed along the inner cutter tube 42, so that the uniform stress of the steel balls can be ensured, and the use reliability of the outer cutter assembly 1 and the supporting component 41 is improved.
As shown in fig. 3, in the present embodiment, the supporting member 41 includes a supporting body 412 for receiving the torsion and a connecting seat 411 connected to a front portion of the supporting body, the connecting seat 411 is sleeved outside the inner cutter tube 42 and circumferentially fixed with the inner cutter tube 42, in this embodiment, the connecting seat 411 is welded to an outer wall of the inner cutter tube 42, and a front end of the supporting body 412 is circumferentially and fixedly connected to the connecting seat 411, for example, by a groove or a protrusion; wherein the rolling body 3 is arranged between the connecting seat 411 and the outer cutter component 1; in this example, the retainer 2 is mounted on the connecting base 41, and the retainer and the connecting base are circumferentially fixed or relatively rotatable.
In this embodiment, the retainer 2 and the connecting seat 411 are relatively rotatable, when the connecting seat 411 rotates relative to the outer cutter assembly 1, the rolling element 3 rotates in the mounting hole 2a, and simultaneously, the retainer 2 is driven to rotate, so that the friction force between the rolling element 3 and the retainer 2 can be reduced, and the retainer 2 and the connecting seat 411 are in small-gap fit, so that the retainer does not radially shake along the inner cutter tube 42 while rotating, and the stability under a working state is improved.
In another embodiment, the retainer 2 and the connecting seat 411 may be fixed circumferentially, so as to avoid wear between the retainer and the connecting seat, for example, by interference, snap or other forms of fixing.
As shown in fig. 4, the connecting base 411 includes a tubular main body and a retaining ring connected to the rear portion of the main body, the rolling element 3 is clamped between the retaining ring and the rear end surface 1a of the outer cutter assembly, the retainer 2 is an annular structure, the retainer 2 is sleeved outside the main body of the connecting base and can rotate circumferentially relative to the connecting base 411, and the main body of the connecting base is provided with a limiting structure 411a for limiting the axial position of the retainer; through will 2 outer sleeves of holder in the main part of connecting seat, holder 2 can also be for the main part circumferential direction of connecting seat simultaneously to reduced the frictional force between rolling element 3 and the holder, through setting up spacing structure 411a spacing to the holder axial position, avoided holder 2 along holder axial float, the assembly of the holder of not only being convenient for, thereby improve assembly efficiency, can also improve the reliability of holder work.
The limiting structure 411a is an annular bulge 411a arranged on the body of the connecting seat, and the outer diameter of the annular bulge is larger than the inner diameter of the retainer; certainly, the limiting structure can also be a clamping ring, a clamping ring groove for installing the clamping ring is formed in the connecting seat, and the clamping ring is installed in the clamping ring groove and simultaneously limits the retainer along the axial direction of the retainer.
As shown in fig. 4, in the present embodiment, the mounting hole 2a is a through hole penetrating through the holder in the axial direction of the inner cutter tube 42, the rolling element 3 is exposed at both ends of the mounting hole 2a, the diameter of one end (front end) of the mounting hole 2a close to the outer cutter assembly 1 is smaller than the diameter of the rolling element 3, and the rolling element 3 is limited from sliding out of the mounting hole 2a forward; after the retainer 2 is mounted on the connecting seat 411, the steel ball is limited between the retainer 2 and the baffle ring, so that the steel ball can be prevented from falling off, the steel ball and the retainer can be conveniently mounted on the supporting component 41 and then assembled with the outer cutter component 1, and the assembly efficiency is improved. Of course, the mounting hole can also be provided in the form of a tapered hole, which can be selected according to specific requirements.
In the present embodiment, the cage 2 is made of a resilient non-metallic material; the elastic non-metallic material is adopted, so that the retainer 2 can be directly sleeved on the annular protrusion 411a, and the assembly of the retainer is convenient.
As shown in fig. 6, in one embodiment, the front end surface 41a of the supporting member is provided with a mounting groove 411b, and the rolling element 3 is mounted in the mounting groove 411b and contacts with the rear end surface 1a of the outer cutter assembly; of course, an installation groove may be formed on the rear end surface 1a of the outer cutter assembly, and the rolling element 3 is installed in the installation groove and contacts with the front end surface 41a of the support member; the front end surface 41a of the supporting component or the rear end surface 1a of the outer cutter assembly is provided with a mounting groove for mounting the rolling body 3, and the rolling body 3 is mounted in the mounting groove, so that the structure is compact, and the weight of the outer cutter assembly 1 or the supporting component 41 is reduced.
As shown in fig. 7, in this embodiment, the connection seat 411 is not provided, and the supporting member 41 includes a supporting body 412, and the supporting body 412 is directly connected with the inner cutting tube 42 to transmit torque, for example, by adhesive connection or by screw connection (the rotation direction is opposite to the screw direction); in this case, the rolling elements 3 may be mounted in the second mounting grooves 412a formed in the front end surface of the support body or the rear end surface of the outer cutter unit 1.
The utility model also provides a medical cutter which is provided with the connecting structure of the inner cutter assembly and the outer cutter assembly. The medical knife may be a burr, a plane, or the like.
According to the utility model, rolling friction is formed between the rolling body 3 and the outer cutter component 1 and/or between the rolling body 3 and the supporting component 41, so that the friction force is reduced, the rotation of the inner cutter component 4 is facilitated, and meanwhile, the heat generated by friction is reduced, so that the service lives of the outer cutter component 1, the rolling body 3 and the inner cutter component 4 are prolonged, the use reliability of the medical cutter is improved, and the cost is saved.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the utility model. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. The utility model provides a connection structure of interior sword subassembly and outer sword subassembly, includes outer sword subassembly and interior sword subassembly, interior sword subassembly includes interior sword pipe and with interior sword union coupling and the supporting component of transmission torsion, interior sword pipe rotationally overlaps and establishes in the outer sword subassembly, its characterized in that: and rolling bodies are arranged between the supporting component and the outer cutter assembly, and rolling friction is formed between the rolling bodies and the outer cutter assembly and/or between the rolling bodies and the supporting component.
2. The connecting structure of the inner blade assembly and the outer blade assembly according to claim 1, wherein: the outer cutter assembly is positioned in front of the supporting component, and the rolling body is arranged between the front end surface of the supporting component and the rear end surface of the outer cutter assembly.
3. The connecting structure of the inner blade assembly and the outer blade assembly according to claim 2, wherein: the rolling tool is characterized in that a retainer is arranged between the front end face of the supporting component and the rear end face of the outer tool assembly, a mounting hole for mounting a rolling body is formed in the retainer, the rolling body is rotatably mounted in the mounting hole, and the rolling body is respectively contacted with the front end face of the supporting component and the rear end face of the outer tool assembly.
4. The connecting structure of the inner blade assembly and the outer blade assembly according to claim 2, wherein: the front end face of the supporting component is provided with an installation groove, and the rolling body is installed in the installation groove and is in contact with the rear end face of the outer cutter component; or the rear end face of the outer cutter component is provided with a mounting groove, and the rolling body is mounted in the mounting groove and is in contact with the front end face of the supporting component.
5. The structure for connecting an inner cutter unit and an outer cutter unit according to any one of claims 1 to 4, wherein: the rolling bodies are metal balls, and the number of the metal balls is at least three, and the metal balls are distributed along the circumferential direction of the inner cutter pipe.
6. The connecting structure of the inner cutter assembly and the outer cutter assembly according to claim 3, characterized in that: the supporting component comprises a supporting body used for connecting torsion and a connecting seat connected with the front part of the supporting body, and the connecting seat is sleeved outside the inner cutter tube and is circumferentially fixed with the inner cutter tube; the retainer is arranged on the connecting seat.
7. The connecting structure of the inner blade assembly and the outer blade assembly according to claim 6, wherein: the retainer is of an annular structure, the retainer is sleeved outside the connecting seat and can rotate circumferentially relative to the connecting seat, and a limiting structure used for limiting the axial position of the retainer is arranged on the connecting seat.
8. The connecting structure of the inner blade assembly and the outer blade assembly according to claim 6, wherein: the mounting hole is a through hole which axially penetrates through the retainer along the inner cutter shaft, the rolling body is exposed out of two ends of the mounting hole, and the diameter of one end, close to the outer cutter assembly, of the mounting hole is smaller than that of the rolling body so as to limit the rolling body to be separated from the retainer.
9. The connecting structure of the inner blade assembly and the outer blade assembly according to claim 3, wherein: the retainer is made of an elastic non-metallic material.
10. A medical knife tool is characterized in that: the medical knife includes the connecting structure of the inner knife assembly and the outer knife assembly according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120648506.9U CN216908056U (en) | 2021-03-30 | 2021-03-30 | Connecting structure of inner knife assembly and outer knife assembly and medical knife |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120648506.9U CN216908056U (en) | 2021-03-30 | 2021-03-30 | Connecting structure of inner knife assembly and outer knife assembly and medical knife |
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| CN216908056U true CN216908056U (en) | 2022-07-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120648506.9U Active CN216908056U (en) | 2021-03-30 | 2021-03-30 | Connecting structure of inner knife assembly and outer knife assembly and medical knife |
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| CN (1) | CN216908056U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115068050A (en) * | 2022-07-29 | 2022-09-20 | 重庆西山科技股份有限公司 | Medical grinding cutter and dynamic sealing structure thereof |
-
2021
- 2021-03-30 CN CN202120648506.9U patent/CN216908056U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115068050A (en) * | 2022-07-29 | 2022-09-20 | 重庆西山科技股份有限公司 | Medical grinding cutter and dynamic sealing structure thereof |
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