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 PDF

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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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knife assembly
outer knife
rolling
support member
end surface
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郭毅军
覃聪
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Chongqing Xishan Science and Technology Co Ltd
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Abstract

本实用新型提供一种内刀组件与外刀组件的连接结构及医用刀具,包括外刀组件和内刀组件,所述内刀组件包括内刀管以及与内刀管连接并传递扭力的支撑部件,所述内刀管可转动地套设于所述外刀组件内,所述支撑部件与外刀组件之间设置有滚动体,所述滚动体与外刀组件之间和/或滚动体与支撑部件之间形成滚动摩擦;所述医用刀具安装有内刀组件与外刀组件的连接结构。通过滚动体与外刀组件之间和/或滚动体与支撑部件之间形成滚动摩擦,从而减少了摩擦力,有利于内刀组件的转动,同时还减少了摩擦产生的热量,从而提高了外刀组件、滚动体、内刀组件的使用寿命,进而提高了医用刀具使用的可靠性,节约了成本。

Figure 202120648506

The utility model provides a connection structure of an inner knife assembly and an outer knife assembly and a medical knife, comprising an outer knife assembly and an inner knife assembly, wherein the inner knife assembly includes an inner knife tube and a supporting part which is connected with the inner knife tube and transmits torsion force , the inner knife tube is rotatably sleeved in the outer knife assembly, a rolling body is arranged between the support member and the outer knife assembly, and/or between the rolling body and the outer knife assembly and/or the rolling body and the outer knife assembly Rolling friction is formed between the supporting parts; the medical knife is provided with a connection structure of the inner knife assembly and the outer knife assembly. Through the formation of rolling friction between the rolling element and the outer knife assembly and/or between the rolling element and the supporting member, the friction force is reduced, which is beneficial to the rotation of the inner knife assembly, and at the same time, the heat generated by friction is also reduced, thereby improving the external The service life of the knife assembly, the rolling body, and the inner knife assembly is improved, thereby improving the reliability of the medical knife and saving the cost.

Figure 202120648506

Description

内刀组件与外刀组件的连接结构及医用刀具Connection structure of inner knife assembly and outer knife assembly and medical knife

技术领域technical field

本实用新型属于医疗器械领域,特别是涉及一种内刀组件与外刀组件的连接结构及医用刀具。The utility model belongs to the field of medical instruments, in particular to a connection structure of an inner knife assembly and an outer knife assembly and a medical knife.

背景技术Background technique

随着医疗技术的发展,磨钻、刨刀等医用刀具在外科手术中广泛应用,该类医用刀具主要由手柄和刀具组成,而刀具主要由外刀组件和内刀组件构成,通过手柄接入动力带动刀具的内刀组件高速旋转,通过刀具的工作部对组织进行磨削。在现有技术中,刀具的内刀组件与外刀组件之间直接采用塑料垫片或其它材料的垫片进行过渡支撑,内刀组件/外刀组件与垫片之间的接触方式为面面接触,在内刀组件与外刀组件相对转动过程中,会与垫片产生很大的摩擦力,不仅不利于内刀组件与外刀组件的转动,同时还会产生大量的热量损坏内刀组件、外刀组件或垫片,从而降低使用寿命,增加成本。With the development of medical technology, grinding drills, planing knives and other medical knives are widely used in surgical operations. Such medical knives are mainly composed of handles and knives, and knives are mainly composed of outer knife components and inner knife components, and the power is connected through the handle. The inner knife assembly that drives the knife rotates at high speed, and grinds the tissue through the working part of the knife. In the prior art, plastic gaskets or gaskets of other materials are directly used for transition support between the inner knife assembly and the outer knife assembly of the tool, and the contact mode between the inner knife assembly/outer knife assembly and the gasket is face-to-face Contact, during the relative rotation of the inner knife assembly and the outer knife assembly, a large friction force will be generated with the gasket, which is not only unfavorable for the rotation of the inner knife assembly and the outer knife assembly, but also generates a lot of heat and damages the inner knife assembly. , outer knife components or gaskets, thereby reducing service life and increasing costs.

实用新型内容Utility model content

鉴于以上所述现有技术的缺点,本实用新型的目的在于提供一种内刀组件与外刀组件的连接结构,以减少内刀组件与外刀组件相对转动时的摩擦,从而减少摩擦热量,提高医用刀具的使用寿命,降低成本。In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a connection structure between the inner knife assembly and the outer knife assembly, so as to reduce the friction when the inner knife assembly and the outer knife assembly rotate relative to each other, thereby reducing frictional heat, Improve the service life of medical tools and reduce costs.

为实现上述目的及其他相关目的,本实用新型提供一种内刀组件与外刀组件的连接结构,包括外刀组件和内刀组件,所述内刀组件包括内刀管以及与内刀管连接并传递扭力的支撑部件,所述内刀管可转动地套设在所述外刀组件内,所述支撑部件与外刀组件之间设置有滚动体,所述滚动体与外刀组件之间和/或滚动体与支撑部件之间形成滚动摩擦。In order to achieve the above purpose and other related purposes, the utility model provides a connection structure of an inner knife assembly and an outer knife assembly, including an outer knife assembly and an inner knife assembly, and the inner knife assembly includes an inner knife tube and is connected with the inner knife tube. A supporting member that transmits torsion force, the inner knife tube is rotatably sleeved in the outer knife assembly, a rolling body is arranged between the supporting member and the outer knife assembly, and the rolling body and the outer knife assembly are arranged between the rolling body and the outer knife assembly And/or rolling friction is formed between the rolling elements and the support member.

可选地,所述外刀组件位于支撑部件的前方,所述滚动体设置在所述支撑部件的前端面与外刀组件的后端面之间。Optionally, the outer knife assembly is located in front of the support member, and the rolling body is disposed between the front end face of the support member and the rear end face of the outer knife assembly.

可选地,所述支撑部件的前端面与外刀组件的后端面之间设置有保持架,所述保持架上设置有用于安装滚动体的安装孔,所述滚动体可转动地安装在安装孔中,且所述滚动体分别与支撑部件的前端面和外刀组件的后端面接触。Optionally, a retainer is provided between the front end surface of the support member and the rear end surface of the outer knife assembly, and the retainer is provided with mounting holes for installing rolling bodies, and the rolling bodies are rotatably installed on the mounting bracket. in the hole, and the rolling bodies are respectively in contact with the front end surface of the support member and the rear end surface of the outer knife assembly.

可选地,所述支撑部件的前端面开设有安装槽,所述滚动体安装在安装槽内,并与所述外刀组件的后端面接触;或者所述外刀组件的后端面开设有安装槽,所述滚动体安装在安装槽内,并与支撑部件的前端面接触。Optionally, the front end surface of the support member is provided with an installation groove, and the rolling body is installed in the installation groove and is in contact with the rear end surface of the outer knife assembly; or the rear end surface of the outer knife assembly is provided with a mounting groove. The rolling element is installed in the installation groove and is in contact with the front end surface of the support member.

可选地,所述滚动体为金属球,所述金属球至少为三个,并沿内刀管周向分布。Optionally, the rolling bodies are metal balls, and the metal balls are at least three and distributed along the circumference of the inner knife tube.

可选地,所述支撑部件包括用于接入扭力的支撑体以及与支撑体前部相连的连接座,所述连接座套在内刀管外,并与内刀管之间周向固定;所述保持架安装在连接座上。Optionally, the support member includes a support body for receiving torsion force and a connection seat connected with the front part of the support body, the connection seat is sleeved outside the inner knife tube, and is circumferentially fixed with the inner knife tube; The retainer is mounted on the connecting seat.

可选地,所述保持架为环形结构,所述保持架套在连接座外,并能相对于连接座周向转动,所述连接座上设置有用于限制保持架轴向位置的限位结构。Optionally, the retainer is an annular structure, the retainer is sleeved outside the connecting seat, and can rotate circumferentially relative to the connecting seat, and the connecting seat is provided with a limit structure for limiting the axial position of the retainer. .

可选地,所述安装孔为沿内刀管轴向贯穿保持架的通孔,且滚动体露出所述安装孔的两端,所述安装孔靠近外刀组件的一端的直径小于滚动体的直径,以限制所述滚动体脱离所述保持架。Optionally, the mounting hole is a through hole penetrating the cage in the axial direction of the inner knife tube, and the rolling elements are exposed at both ends of the mounting hole, and the diameter of one end of the mounting hole close to the outer knife assembly is smaller than the diameter of the rolling element. diameter to limit the rolling body from the cage.

可选地,所述保持架由弹性非金属材料制成。Optionally, the cage is made of elastic non-metallic material.

本实用新型还提供了一种医用刀具,所述医用刀具包括所述的内刀组件与外刀组件的连接结构。The utility model also provides a medical knife, which comprises the connection structure of the inner knife assembly and the outer knife assembly.

如上所述,本实用新型的一种内刀组件与外刀组件的连接结构及医用刀具,具有以下有益效果:通过滚动体与外刀组件之间和/或滚动体与支撑部件之间形成滚动摩擦,从而减少了摩擦力,有利于内刀组件的转动,同时还减少了摩擦产生的热量,从而提高了外刀组件、滚动体、内刀组件的使用寿命,进而提高了医用刀具使用的可靠性,节约了成本。As mentioned above, the connection structure of the inner knife assembly and the outer knife assembly and the medical knife of the present invention have the following beneficial effects: through the formation of rolling between the rolling body and the outer knife assembly and/or between the rolling body and the supporting member friction, thereby reducing the friction force, which is beneficial to the rotation of the inner knife assembly, and at the same time reduces the heat generated by friction, thereby improving the service life of the outer knife assembly, the rolling body, and the inner knife assembly, thereby improving the reliability of medical knives. sex, saving costs.

附图说明Description of drawings

图1为本实用新型一个实施例的结构示意图;Fig. 1 is the structural representation of one embodiment of the utility model;

图2为本实用新型一个实施例的爆炸图;2 is an exploded view of an embodiment of the present utility model;

图3为图1中Ⅰ处的放大剖切示意图;Fig. 3 is the enlarged cutaway schematic diagram of I in Fig. 1;

图4为本实用新型一个实施例保持架的轴测示意图;FIG. 4 is a schematic axonometric view of a cage according to an embodiment of the present invention;

图5为本实用新型一个实施例的内刀组件的剖视图;5 is a cross-sectional view of an inner knife assembly according to an embodiment of the present invention;

图6为本实用新型另一个实施例的内刀组件的剖视图;6 is a cross-sectional view of an inner knife assembly according to another embodiment of the present invention;

图7为本实用新型再一个实施例的内刀组件的剖视图。FIG. 7 is a cross-sectional view of an inner knife assembly according to still another embodiment of the present invention.

零件标号说明:Part number description:

1-外刀组件;1a-外刀组件的后端面;2-保持架;2a-安装孔;2b-限位凸台;3-滚动体;4-内刀组件;41-支撑部件;41a-支撑部件的前端面;411-连接座;411a-限位结构;411b-安装槽;412-支撑体;412a-第二安装槽;42-内刀管。1-outer knife assembly; 1a-rear end face of outer knife assembly; 2-retainer; 2a-installation hole; 2b-limiting boss; 3-rolling body; 4-inner knife assembly; 41-support part; 41a- 411-connecting seat; 411a-limiting structure; 411b-installation groove; 412-support body; 412a-second installation groove; 42-inner knife tube.

具体实施方式Detailed ways

以下由特定的具体实施例说明本实用新型的实施方式,熟悉此技术的人士可由本说明书所揭露的内容轻易地了解本实用新型的其他优点及功效。The embodiments of the present invention are described below by specific embodiments, and those who are familiar with the technology can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

本例中,以医用刀具使用时朝向患者的一方为前方,背离患者的一方为后方进行阐述,本例中以磨钻刀具作为示例。In this example, the side of the medical tool facing the patient during use is taken as the front, and the side away from the patient is defined as the rear. In this example, a grinding tool is used as an example.

如图1-3所示,本例示意的一种内刀组件与外刀组件的连接结构,包括外刀组件1和内刀组件4,其中,内刀组件4包括内刀管42和支撑部件41,支撑部件41与内刀管42连接,并能同步转动,以向内刀管42传递来自动力手柄的扭力,从而带动内刀管42转动磨削;外刀组件1套设在内刀管42外,两者在周向上可相对转动;关键在于:支撑部件41与外刀组件1之间设置有滚动体3,滚动体3与外刀组件1之间或滚动体3与支撑部件41之间形成滚动摩擦,或者滚动体3分别与外刀组件1和支撑部件41形成滚动摩擦;通过滚动体3与外刀组件1之间和/或滚动体3与支撑部件41之间形成滚动摩擦,一方面改变滑动摩擦为滚动摩擦,另一方面减少接触面积,从而减少了摩擦力,有利于内刀组件4的转动,同时降低摩擦产生的热量,从而提高了外刀组件1、滚动体3、内刀组件4的使用寿命,节约了成本。所述滚动体3可以为球体、截面为圆形的环状体或其它能使得与外刀组件1或/和支撑部件41之间形成滚动摩擦的构件,可根据具体需求选择。As shown in Figures 1-3, a connection structure between an inner knife assembly and an outer knife assembly shown in this example includes an outer knife assembly 1 and an inner knife assembly 4, wherein the inner knife assembly 4 includes an inner knife tube 42 and a support member 41. The support member 41 is connected with the inner knife tube 42 and can rotate synchronously to transmit the torque from the power handle to the inner knife tube 42, thereby driving the inner knife tube 42 to rotate and grind; the outer knife assembly 1 is sleeved on the inner knife tube In addition to 42, the two can rotate relative to each other in the circumferential direction; the key lies in: a rolling body 3 is arranged between the supporting member 41 and the outer knife assembly 1, between the rolling body 3 and the outer knife assembly 1 or between the rolling body 3 and the supporting member 41 Rolling friction is formed, or rolling friction is formed between the rolling element 3 and the outer knife assembly 1 and the supporting member 41; On the one hand, the sliding friction is changed to rolling friction, and on the other hand, the contact area is reduced, thereby reducing the friction force, which is beneficial to the rotation of the inner knife assembly 4, and at the same time reduces the heat generated by friction, thereby improving the outer knife assembly 1, rolling body 3, inner The service life of the knife assembly 4 saves the cost. The rolling body 3 can be a sphere, an annular body with a circular cross-section, or other components that can form rolling friction with the outer knife assembly 1 or/and the support member 41 , which can be selected according to specific needs.

内刀管42与支撑部件41之间可通过焊接、粘接、螺纹连接或其它形式的可拆卸式固定连接,所述支撑部件41与内刀管42连接并传递扭矩的含义为所述支撑部件41与外刀管42之间连接在一起可同步转动,以便可通过驱动支撑部件41转动,使得内刀管42跟随支撑部件41转动。The inner cutter tube 42 and the support member 41 may be connected by welding, bonding, screw connection or other forms of detachable fixed connection, and the support member 41 is connected with the inner cutter tube 42 and transmits torque. The meaning is the support member The connection between 41 and the outer knife tube 42 can rotate synchronously, so that the supporting member 41 can be driven to rotate, so that the inner knife tube 42 can follow the supporting member 41 to rotate.

在本实施例中,支撑部件41与内刀管42后部连接,外刀组件1位于支撑部件41的前方,即支撑部件41的前端面41a与外刀组件的后端面1a相对,滚动体3设置在支撑部件41的前端面41a与外刀组件的后端面1a之间;通过将滚动体3设置于支撑部件的前端面41a与外刀组件的后端面1a之间,相较于传统采用垫圈的方式,减小了摩擦面积和相对转动时的摩擦力,降低摩擦产生的热量;滚动体3的安装方式可通过设置保持架安装,或在外刀组件1、支撑部件41上开设安装滚动体3的安装槽,可根据具体需求选择。In this embodiment, the support member 41 is connected to the rear of the inner knife tube 42, the outer knife assembly 1 is located in front of the support member 41, that is, the front end surface 41a of the support member 41 is opposite to the rear end surface 1a of the outer knife assembly, and the rolling elements 3 It is arranged between the front end face 41a of the support member 41 and the rear end face 1a of the outer knife assembly; by arranging the rolling elements 3 between the front end face 41a of the support member and the rear end face 1a of the outer knife assembly, compared with the traditional use of washers In the way, the friction area and the friction force during relative rotation are reduced, and the heat generated by friction is reduced; the installation method of the rolling body 3 can be installed by setting the cage, or the outer knife assembly 1 and the supporting member 41 are installed on the rolling body 3. The installation slot can be selected according to specific needs.

如图2-4所示,在本实施例中,支撑部件的前端面41a与外刀组件的后端面1a之间设置有保持架2,该保持架2上设置有用于安装滚动体3的安装孔2a,滚动体3可自由转动地安装在安装孔2a中,且滚动体3分别与支撑部件的前端面41a和外刀组件的后端面1a接触;通过设置保持架2安装滚动体3,具有结构简单,减少加工难度,提高装配效率等优点;通过将所述滚动体3可转动的安装于安装孔2a中,在外刀组件1与支撑部件41相对转动时,所述滚动体3可在安装孔2a内滚动,使得滚动体3与支撑部件的前端面41a之间以及滚动体3与外刀组件的后端面1a之间分别形成滚动摩擦。As shown in Figures 2-4, in this embodiment, a cage 2 is provided between the front end surface 41a of the support member and the rear end surface 1a of the outer knife assembly, and the cage 2 is provided with a mounting for mounting the rolling elements 3 Hole 2a, the rolling body 3 is rotatably installed in the mounting hole 2a, and the rolling body 3 is in contact with the front end surface 41a of the support member and the rear end surface 1a of the outer knife assembly; by setting the cage 2 to install the rolling body 3, with The structure is simple, the processing difficulty is reduced, and the assembly efficiency is improved. Rolling in the hole 2a causes rolling friction between the rolling element 3 and the front end surface 41a of the support member and between the rolling element 3 and the rear end surface 1a of the outer knife assembly respectively.

所述保持架2可固定设置于外刀组件1或支撑部件41,所述保持架2还可相对于内刀管42周向转动的设置于外刀组件1或支撑部件41。The retainer 2 can be fixedly arranged on the outer knife assembly 1 or the support member 41 , and the retainer 2 can also be arranged on the outer knife assembly 1 or the support member 41 in a circumferential direction relative to the inner knife tube 42 .

在本实施例中,所述滚动体3为金属球,例如钢球(或称滚珠)、铁球等,所述金属球至少为三个,并沿内刀管42周向分布;本例中采用钢球,具有结构简单,便于生产制造,成本低廉的优点;所述钢球可为三个、四个或其它数量,这里将钢球选择为四个,在不增加钢球数量的情况下,还能提高支撑部件41转动时的可靠性。钢球沿内刀管42周向均匀分布,也可沿内刀管42周向不均匀分布,这里优选所述钢球沿内刀管42均匀分布,能保证钢球受力均匀,从而提高外刀组件1、支撑部件41使用的可靠性。In this embodiment, the rolling bodies 3 are metal balls, such as steel balls (or balls), iron balls, etc. There are at least three metal balls, which are distributed along the circumferential direction of the inner knife tube 42; in this example The use of steel balls has the advantages of simple structure, convenient production and low cost; the steel balls can be three, four or other numbers, here four steel balls are selected, without increasing the number of steel balls , the reliability of the support member 41 when it is rotated can also be improved. The steel balls are evenly distributed along the circumference of the inner knife tube 42, or they can be unevenly distributed along the circumference of the inner knife tube 42. Here, the steel balls are preferably evenly distributed along the inner knife tube 42, which can ensure that the steel balls are evenly stressed, thereby improving the external The reliability of the use of the knife assembly 1 and the support member 41 .

如图3所示,在本实施例中,支撑部件41包括用于接入扭力的支撑体412以及与支撑体前部相连的连接座411,所述连接座411套在内刀管42外,并与内刀管42之间周向固定,本例中连接座411与内刀管42外壁焊接,支撑体412的前端与连接座411周向固定地连接,例如通过凹槽、凸起配合;其中滚动体3设置在连接座411与外刀组件1之间;本例中,保持架2安装在连接座41上,且所述保持架与连接座之间周向固定或可相对转动。As shown in FIG. 3 , in this embodiment, the support member 41 includes a support body 412 for receiving torsion force and a connection seat 411 connected to the front of the support body, the connection seat 411 is sleeved outside the inner knife tube 42, It is circumferentially fixed with the inner knife tube 42. In this example, the connecting seat 411 is welded to the outer wall of the inner knife tube 42, and the front end of the support body 412 is circumferentially fixedly connected with the connecting seat 411, such as through grooves and protrusions. The rolling body 3 is arranged between the connecting seat 411 and the outer knife assembly 1; in this example, the cage 2 is installed on the connecting seat 41, and the cage and the connecting seat are circumferentially fixed or relatively rotatable.

本例中,所述保持架2与连接座411之间采用可相对转动的方式,在连接座411相对于外刀组件1转动时,滚动体3在安装孔2a内转动,同时会带动保持架2转动,能降低滚动体3与保持架2之间的摩擦力,所述保持架2与连接座411之间采用小间隙配合,使得保持架在转动的同时不会发生沿内刀管42径向晃动,提高了工作状态下的稳定性。In this example, the cage 2 and the connecting seat 411 are relatively rotatable. When the connecting seat 411 rotates relative to the outer knife assembly 1, the rolling body 3 rotates in the mounting hole 2a, and at the same time drives the cage 2 rotation, can reduce the friction between the rolling element 3 and the cage 2, the cage 2 and the connecting seat 411 adopt a small clearance fit, so that the cage will not occur along the diameter of the inner knife tube 42 when the cage rotates Shake to improve the stability of the working state.

在另一实施方式中,所述保持架2与连接座411之间可采用周向固定的方式,能避免保持架与连接座之间的磨损,例如采用过盈连接、卡接连接或其它形式的固定连接。In another embodiment, the retainer 2 and the connecting seat 411 can be fixed in the circumferential direction, which can avoid the wear between the retainer and the connecting seat, such as interference connection, snap connection or other forms. fixed connection.

如图4所示,连接座411包括管状的主体以及连接在主体后部的挡环,滚动体3夹在挡环和外刀组件后端面1a之间,保持架2为环形结构,保持架2套在连接座的主体外,并能相对于连接座411周向转动,连接座的主体上设置有用于限制保持架轴向位置的限位结构411a;通过将所述保持架2外套于连接座的主体,同时保持架2还能相对于连接座的主体周向转动,从而减少了滚动体3与保持架之间的摩擦力,通过设置对保持架轴向位置限位的限位结构411a,避免保持架2沿保持架轴向窜动,不仅便于保持架的装配,从而提高装配效率,还能提高保持架工作的可靠性。As shown in FIG. 4 , the connecting seat 411 includes a tubular main body and a retaining ring connected to the rear of the main body. The rolling element 3 is sandwiched between the retaining ring and the rear end surface 1a of the outer knife assembly. The cage 2 is an annular structure. It is sleeved outside the main body of the connecting seat and can rotate relative to the connecting seat 411 in the circumferential direction. The main body of the connecting seat is provided with a limiting structure 411a for limiting the axial position of the cage; At the same time, the cage 2 can also rotate relative to the main body of the connecting seat in the circumferential direction, thereby reducing the friction between the rolling elements 3 and the cage. By setting the limit structure 411a to limit the axial position of the cage, Preventing the cage 2 from moving along the axial direction of the cage not only facilitates the assembly of the cage, thereby improving the assembly efficiency, but also improves the reliability of the cage.

限位结构411a为设置于连接座的主体上的环形凸起411a,所述环形凸起的外径大于保持架的内径;当然,所述限位结构还可为卡圈,并在连接座上开设用于安装卡圈的卡圈槽,卡圈安装于卡圈槽内同时对保持架沿保持架轴向进行限位。The limiting structure 411a is an annular protrusion 411a disposed on the main body of the connecting seat, and the outer diameter of the annular protrusion is larger than the inner diameter of the cage; A clamp ring groove for installing the clamp ring is opened, and the clamp ring is installed in the clamp ring groove while limiting the position of the cage along the axial direction of the cage.

如图4所示,在本实施例中,所述安装孔2a为沿内刀管42轴向贯穿保持架的通孔,且滚动体3露出安装孔2a的两端,安装孔2a靠近外刀组件1的一端(前端)的直径小于滚动体3的直径,限制滚动体3向前滑出安装孔2a;在保持架2安装于连接座411后,将钢球限制在保持架2与挡环之间,能避免钢球脱落,便于将钢球和保持架安装到支撑部件41上后再与外刀组件1装配,从而提高装配效率。当然,还可将安装孔设置为锥形孔的形式可根据具体需求选择。As shown in FIG. 4 , in this embodiment, the mounting hole 2a is a through hole penetrating the cage along the axial direction of the inner knife tube 42, and the rolling elements 3 are exposed at both ends of the mounting hole 2a, and the mounting hole 2a is close to the outer knife The diameter of one end (front end) of the assembly 1 is smaller than the diameter of the rolling element 3, which restricts the rolling element 3 from sliding out of the mounting hole 2a; In between, the steel ball can be prevented from falling off, and it is convenient to install the steel ball and the cage on the support member 41 and then assemble with the outer knife assembly 1, thereby improving the assembly efficiency. Of course, the mounting holes can also be set in the form of tapered holes, which can be selected according to specific needs.

在本实施例中,所述保持架2由弹性非金属材料制成;采用弹性非金属材料,使得保持架2可直接套过环形凸起411a,便于保持架的装配。In this embodiment, the retainer 2 is made of elastic non-metallic material; the elastic non-metallic material is used, so that the retainer 2 can be directly sleeved over the annular protrusion 411a, which facilitates the assembly of the retainer.

如图6所示,在一个实施例中,所述支撑部件的前端面41a开设有安装槽411b,所述滚动体3安装在安装槽411b内,并与所述外刀组件的后端面1a接触;当然也可以在外刀组件的后端面1a开设有安装槽,所述滚动体3安装在安装槽内,并与支撑部件的前端面41a接触;通过在支撑部件的前端面41a或外刀组件的后端面1a开设用于安装滚动体3的安装槽,并将滚动体3安装于安装槽内,不仅增加了结构紧凑性,同时还降低了外刀组件1或支撑部件41的重量。As shown in FIG. 6 , in one embodiment, a mounting groove 411b is defined on the front end surface 41a of the support member, and the rolling element 3 is mounted in the mounting groove 411b and is in contact with the rear end surface 1a of the outer knife assembly Of course, an installation groove can also be opened on the rear end face 1a of the outer knife assembly, and the rolling body 3 is installed in the installation groove and is in contact with the front end face 41a of the support member; The rear end surface 1a has an installation groove for installing the rolling element 3, and the rolling element 3 is installed in the installation groove, which not only increases the compactness of the structure, but also reduces the weight of the outer knife assembly 1 or the support member 41.

如图7所示,本例中不设置连接座411,支撑部件41包括支撑体412,支撑体412直接与内刀管42连接传递扭矩,例如粘胶连接或者通过螺纹连接(转动方向与螺纹方向相反);此时可直接在支撑体前端面或者外刀组件1后端面开设第二安装槽412a安装滚动体3。As shown in FIG. 7 , the connecting seat 411 is not provided in this example, and the supporting member 41 includes a supporting body 412, which is directly connected to the inner cutter tube 42 to transmit torque, such as glue connection or screw connection (rotation direction and thread direction). On the contrary); at this time, a second installation groove 412a can be opened directly on the front end surface of the support body or the rear end surface of the outer knife assembly 1 to install the rolling body 3 .

本实用新型还提供了一种医用刀具,所述医用刀具安装有所述的内刀组件与外刀组件的连接结构。医用刀具可以是磨钻、刨刀等。The utility model also provides a medical knife, wherein the medical knife is provided with the connecting structure of the inner knife assembly and the outer knife assembly. Medical knives can be grinders, planers, and the like.

本实用新型,通过滚动体3与外刀组件1之间和/或滚动体3与支撑部件41之间形成滚动摩擦,从而减少了摩擦力,有利于内刀组件4的转动,同时还减少了摩擦产生的热量,从而提高了外刀组件1、滚动体3、内刀组件4的使用寿命,进而提高了医用刀具使用的可靠性,节约了成本。In the present invention, rolling friction is formed between the rolling element 3 and the outer knife assembly 1 and/or between the rolling element 3 and the supporting member 41, thereby reducing the frictional force, which is beneficial to the rotation of the inner knife assembly 4, and also reduces the The heat generated by friction increases the service life of the outer knife assembly 1, the rolling body 3 and the inner knife assembly 4, thereby improving the reliability of the medical knife and saving the cost.

上述实施例仅例示性说明本实用新型的原理及其功效,而非用于限制本实用新型。任何熟悉此技术的人士皆可在不违背本实用新型的精神及范畴下,对上述实施例进行修饰或改变。因此,举凡所属技术领域中具有通常知识者在未脱离本实用新型所揭示的精神与技术思想下所完成的一切等效修饰或改变,仍应由本实用新型的权利要求所涵盖。The above-mentioned embodiments merely illustrate the principles and effects of the present invention, but are not intended to limit the present invention. Anyone skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present invention should still be covered by the claims of the present invention.

Claims (10)

1.一种内刀组件与外刀组件的连接结构,包括外刀组件和内刀组件,所述内刀组件包括内刀管以及与内刀管连接并传递扭力的支撑部件,所述内刀管可转动地套设在所述外刀组件内,其特征在于:所述支撑部件与外刀组件之间设置有滚动体,所述滚动体与外刀组件之间和/或滚动体与支撑部件之间形成滚动摩擦。1. a connection structure of an inner knife assembly and an outer knife assembly, comprising an outer knife assembly and an inner knife assembly, and the inner knife assembly includes an inner knife tube and a support member that is connected with the inner knife tube and transmits torsion, the inner knife The tube is rotatably sleeved in the outer knife assembly, and is characterized in that: a rolling body is arranged between the support member and the outer knife assembly, and/or between the rolling body and the outer knife assembly and/or between the rolling body and the support Rolling friction occurs between the components. 2.根据权利要求1所述的内刀组件与外刀组件的连接结构,其特征在于:所述外刀组件位于支撑部件的前方,所述滚动体设置在所述支撑部件的前端面与外刀组件的后端面之间。2 . The connection structure of the inner knife assembly and the outer knife assembly according to claim 1 , wherein the outer knife assembly is located in front of the support member, and the rolling body is arranged on the front end surface and the outer face of the support member. 3 . between the rear faces of the knife assemblies. 3.根据权利要求2所述的内刀组件与外刀组件的连接结构,其特征在于:所述支撑部件的前端面与外刀组件的后端面之间设置有保持架,所述保持架上设置有用于安装滚动体的安装孔,所述滚动体可转动地安装在安装孔中,且所述滚动体分别与支撑部件的前端面和外刀组件的后端面接触。3 . The connection structure of the inner knife assembly and the outer knife assembly according to claim 2 , wherein a cage is provided between the front end surface of the support member and the rear end surface of the outer knife assembly, and the cage is mounted on the cage. 4 . Mounting holes for mounting rolling bodies are provided, the rolling bodies are rotatably mounted in the mounting holes, and the rolling bodies are respectively in contact with the front end surface of the support member and the rear end surface of the outer knife assembly. 4.根据权利要求2所述的内刀组件与外刀组件的连接结构,其特征在于:所述支撑部件的前端面开设有安装槽,所述滚动体安装在安装槽内,并与所述外刀组件的后端面接触;或者所述外刀组件的后端面开设有安装槽,所述滚动体安装在安装槽内,并与支撑部件的前端面接触。4 . The connection structure between the inner knife assembly and the outer knife assembly according to claim 2 , wherein an installation groove is formed on the front end surface of the support member, and the rolling body is installed in the installation groove and is connected with the The rear end surface of the outer knife assembly is in contact; or the rear end surface of the outer knife assembly is provided with an installation groove, and the rolling body is installed in the installation groove and is in contact with the front end surface of the support member. 5.根据权利要求1-4任意一项所述的内刀组件与外刀组件的连接结构,其特征在于:所述滚动体为金属球,所述金属球至少为三个,并沿内刀管周向分布。5. The connection structure of the inner knife assembly and the outer knife assembly according to any one of claims 1-4, characterized in that: the rolling bodies are metal balls, and the metal balls are at least three and extend along the inner knife Circumferential distribution of the tube. 6.根据权利要求3所述的内刀组件与外刀组件的连接结构,其特征在于:所述支撑部件包括用于接入扭力的支撑体以及与支撑体前部相连的连接座,所述连接座套在内刀管外,并与内刀管之间周向固定;所述保持架安装在连接座上。6 . The connection structure of the inner knife assembly and the outer knife assembly according to claim 3 , wherein the supporting member comprises a supporting body for receiving torsion force and a connecting seat connected with the front part of the supporting body, and the The connecting seat is sleeved outside the inner knife tube, and is circumferentially fixed with the inner knife tube; the retainer is installed on the connecting seat. 7.根据权利要求6所述的内刀组件与外刀组件的连接结构,其特征在于:所述保持架为环形结构,所述保持架套在连接座外,并能相对于连接座周向转动,所述连接座上设置有用于限制保持架轴向位置的限位结构。7 . The connecting structure of the inner knife assembly and the outer knife assembly according to claim 6 , wherein the retainer is an annular structure, the retainer is sleeved outside the connecting seat, and can be circumferentially relative to the connecting seat. 8 . Rotating, the connecting seat is provided with a limiting structure for limiting the axial position of the cage. 8.根据权利要求6所述的内刀组件与外刀组件的连接结构,其特征在于:所述安装孔为沿内刀管轴向贯穿保持架的通孔,且滚动体露出所述安装孔的两端,所述安装孔靠近外刀组件的一端的直径小于滚动体的直径,以限制所述滚动体脱离所述保持架。8 . The connection structure of the inner knife assembly and the outer knife assembly according to claim 6 , wherein the mounting hole is a through hole penetrating the cage along the axial direction of the inner knife tube, and the rolling body is exposed from the mounting hole. 9 . The diameter of one end of the mounting hole close to the outer knife assembly is smaller than the diameter of the rolling body, so as to restrict the rolling body from separating from the cage. 9.根据权利要求3所述的内刀组件与外刀组件的连接结构,其特征在于:所述保持架由弹性非金属材料制成。9 . The connecting structure of the inner knife assembly and the outer knife assembly according to claim 3 , wherein the holder is made of elastic non-metallic material. 10 . 10.一种医用刀具,其特征在于:所述医用刀具包括权利要求1-9任意一项所述的内刀组件与外刀组件的连接结构。10. A medical knife, characterized in that: the medical knife comprises the connection structure of the inner knife assembly and the outer knife assembly according to any one of claims 1-9.
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Cited By (1)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
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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