CN115046013A

CN115046013A - Cutter bar sealing structure

Info

Publication number: CN115046013A
Application number: CN202210703139.7A
Authority: CN
Inventors: 陈绪贵; 胡冰
Original assignee: Shenzhen Puhui Medical Technology Co ltd
Current assignee: Shenzhen Puhui Medical Technology Co ltd
Priority date: 2022-06-21
Filing date: 2022-06-21
Publication date: 2022-09-13

Abstract

The invention relates to a cutter bar sealing structure which comprises a cutter bar, wherein the cutter bar comprises a cylindrical tail part with the same axial lead, a first coupling area, a thickness alternating area and a second coupling area which are sequentially connected, the thickness alternating area is formed by alternating cylinders with different diameters, a first sealing ring is detachably sleeved on the first coupling area, a second sealing ring is detachably sleeved on the second coupling area, a sealing assembly is sleeved on the thickness alternating area, the sealing assembly comprises two connected third sealing rings and an O-shaped sealing ring which is detachably arranged between the two third sealing rings, a sealing ring bulge which surrounds the third sealing ring by one circle is arranged on one end surface of the third sealing ring along the axial direction of the third sealing ring in an extending mode, the inner diameter of the sealing ring bulge is larger than that of the third sealing ring, and the two third sealing rings are fixedly sleeved on the thickness alternating area in a mode that the sealing ring bulges are opposite and are connected. The invention solves the problem of air tightness between the cutter bar and the inner tube in the ultrasonic cutter, and can achieve the function of reusing the cutter bar.

Description

Cutter bar sealing structure

Technical Field

The invention relates to medical instruments, in particular to a cutter bar sealing structure.

Background

In clinical practice, ultrasonic surgical knife has a good effect, and has become an important tool for clinical surgery. However, some problems also exist in clinical use, the airtight structure of the knife bar assembly in the existing ultrasonic knife is formed by injecting soft rubber in a sectional mode on the knife bar to form a sealing structure, and due to the characteristic of the soft rubber, the structure cannot be reused after cleaning, disinfection and sterilization, so that the resource waste is caused, and the use cost is increased.

Disclosure of Invention

Aiming at the existing defects, the invention provides a cutter bar sealing structure.

The technical scheme adopted by the invention for solving the technical problems is as follows: a cutter bar sealing structure comprises a cutter bar, wherein the cutter bar comprises a tail part, a first coupling area, a thickness alternating area and a second coupling area which are sequentially connected and form a cylindrical shape and have the same axial lead, the thickness alternating area is composed of cylinders with different diameters in an alternating mode, a first sealing ring is detachably sleeved on the first coupling area, a second sealing ring is detachably sleeved on the second coupling area, a sealing assembly is sleeved on the thickness alternating area, the sealing component comprises two connected third sealing rings and an O-shaped sealing ring which is detachably arranged between the two third sealing rings, one end surface of the third sealing ring extends along the axial direction thereof with a sealing ring bulge which surrounds the third sealing ring for a circle, the raised inner diameter of the sealing ring is larger than that of the third sealing rings, and the two third sealing rings are fixedly sleeved on the thickness alternation area in a mode that the sealing rings are raised and opposite and are connected.

Preferably, the seal ring protrusion is a protrusion extending axially from an outer edge of the third seal ring.

Preferably, the sealing ring is raised into a wave-shaped structure and provided with a plurality of wave crests in radially symmetrical positions.

Preferably, an inner wall groove surrounding the second sealing ring for a circle is formed in the inner side wall of the second sealing ring, and a cutter bar protrusion capable of being in interference fit with the inner wall groove and radially surrounding the cutter bar for a circle is arranged on the second coupling area.

As preferred, first sealing washer all is provided with the sealing washer through-hole that link up first sealing washer lateral wall in two positions of radial symmetry, be provided with the cutter arbor through-hole that radially link up the cutter arbor lateral wall in the first coupling district, install the both ends and stretch out the cutter arbor through-hole and the diameter at both ends is greater than the only rotation axis of the I shape structure of one-tenth of cutter arbor through-hole diameter in the cutter arbor through-hole, first sealing washer cover is established on the cutter arbor and only rotation axis's both ends correspondence is worn out from two sealing washer through-holes.

Preferably, an outer wall groove spaced from the sealing ring through hole is further formed in the outer wall of the first sealing ring along the circumferential direction of the first sealing ring.

Preferably, the diameter of all the coarse structures in the thick-thin alternating region is equal, and the diameter of all the fine structures is also equal.

Preferably, the first coupling region and the second coupling region are both connected with the thick structure in the thick-thin alternating region.

Preferably, a tool bit is further connected to the front end of the second coupling region.

Preferably, fillet transition areas are arranged between the thick structures and the thin structures in the thick-thin alternating areas.

The invention has the beneficial effects that: the O-shaped sealing ring is arranged between the two third sealing rings, a sealing groove is formed in the mounting structure of the two third sealing rings on the cutter bar, the O-shaped sealing ring is mounted in the sealing groove, the position of the O-shaped sealing ring can be fixed, the O-shaped sealing ring cannot be taken out of the third sealing ring when the cutter pipe assembly slides, the O-shaped sealing ring is tightly matched with the inner wall of the cutter pipe assembly in a compression deformation mode when the cutter pipe assembly is inserted, the sealing effect is achieved, and meanwhile the O-shaped sealing ring can be replaced by pressing the sealing ring to protrude, so that the purpose of reusing the cutter bar is achieved.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of two third seal rings arranged oppositely according to the embodiment of the present invention;

FIG. 3 is a schematic structural view of an O-ring according to an embodiment of the present invention;

FIG. 4 is a schematic view of a second seal ring according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a first seal ring according to an embodiment of the present invention;

FIG. 6 is a schematic structural view of a rotation stop shaft according to an embodiment of the present invention;

part names and serial numbers in the figure: 1-a cutter bar 10-a tail 11-a first coupling area 12-a thickness alternating area 13-a second coupling area 14-a fillet transition area 2-a first sealing ring 20-a sealing ring through hole 21-an outer wall groove 3-a second sealing ring 30-an inner wall groove 4-a sealing component 40-a third sealing ring 41-an O-shaped sealing ring 400-a sealing ring bulge 5-a rotation stopping shaft 6-a cutter head.

Detailed Description

To more clearly illustrate the objects, technical solutions and advantages of the embodiments of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and embodiments, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without inventive step, are within the scope of the present invention. In addition, directional terms used in the present invention, such as "upper", "lower", "front", "rear", "left", "right", "inner", "outer", etc., refer to directions only as shown in the attached drawings, and are used for better and clearer explanation and understanding of the present invention, and do not indicate or imply orientation which the present invention must have, and thus, should not be construed as limiting the present invention.

Embodiments of the present invention are shown in fig. 1 to 6, and a cutter bar sealing structure comprises a cutter bar 1, wherein the cutter bar 1 comprises a tail 10, a first coupling region 11, a thick-thin alternating region 12 and a second coupling region 13 which are connected in sequence and form a cylindrical shape and have the same axis, each of the parts is integrally formed, the tail 10, the first coupling region 11, the thick-thin alternating region 12 and the second coupling region 13 are used for connecting a transducer in sequence from back to front, the thick-thin alternating region 12 and a sound wave generate resonance to transmit energy to a cutter head 6 connected to the front end of the second coupling region 13, so that the cutter head 6 generates strong vibration, the thick-thin structure is helpful to improve longitudinal vibration and reduce transverse vibration, so that the operation of the cutter head 6 is more stable, the cutting effect of an ultrasonic knife is enhanced, the first coupling region 11 plays a role of transition conduction, and the problem that the cutter bar 1 is broken due to excessive stress is avoided, the second coupling area 13 is used for connecting the cutter head 6, namely the front end of the second coupling area 13 is connected with the cutter head 6, so that the cutter bar 1 is prevented from colliding with the wall of a scalpel tube due to overlarge amplitude in work, the thickness alternating area 12 is formed by alternating cylinders with different diameters, the lengths of the thick structures and the thin structures are correspondingly set according to use requirements, the diameters of all the thick structures in the thickness alternating area 12 are equal, the diameters of all the thin structures are equal, so that the vibration of the cutter head 6 is ensured to be optimal, the cutting effect of the ultrasonic knife is improved, the energy loss is reduced, the diameter difference between the thick structures and the thin structures is preferably controlled within 0.3mm, overlarge stress caused by overlarge diameter difference between the thick structures and the thin structures cannot be generated, the cutter bar breakage problem is further caused, meanwhile, the fillet transition area 14 is arranged between the thick structures and the thin structures in the thickness alternating area 12, so that the cutter bar 1 is smoother in vibration, the stress at the connection position of the thick and thin structures is reduced, the problem that the cutter bar 1 is broken due to stress is avoided, the first coupling area 11 is detachably sleeved with the first sealing ring 2, namely the first sealing ring 2 is detachably sleeved at the first coupling area 11 of the cutter bar 1 and is positioned at the sleeved position to prevent the first sealing ring from moving and from falling off in use, the first sealing ring 2 is convenient to replace, the second coupling area 13 is detachably sleeved with the second sealing ring 3, the second sealing ring 3 is sleeved at the second coupling area 13 and then positioned similarly, the stable installation of the second sealing ring 3 is maintained, the first sealing ring 2 is prevented from falling off in use, the thick and thin alternating area 12 is sleeved with the sealing assembly 4, so that a plurality of sealing structures are distributed on the cutter bar 1 at intervals, and good sealing is realized while the cutter bar 1 is supported to be balanced in the inner space of the cutter tube assembly, the annular space between the cutter bar 1 and the cutter tube is sealed to achieve the sealing effect, the cutter tube assembly slides when in use, certain air flows in the annular space in the cutter tube assembly, when the cutter tube assembly is immersed in liquid, the sealing structure on the cutter bar 1 can prevent a part of liquid or pollution particles from flowing back into the tube cavity, the sealing assembly 4 comprises two connected third sealing rings 40 and an O-shaped sealing ring 41 arranged between the two third sealing rings 40, the two third sealing rings 40 have the same structure and are both of annular structures, the O-shaped sealing ring 41 is arranged between the two third sealing rings 40, and are connected with each other, so that the front end and the rear end of the O-shaped sealing ring 41 are both blocked by one third sealing ring 40, a sealing ring bulge 400 which surrounds the third sealing ring 40 by one circle is axially extended on one end face of the third sealing ring 40, namely the sealing ring bulge 400 is also of an annular structure, the seal ring bulge 400 is positioned on the end face of the third seal ring 40, at this time, the inner diameter of the seal ring bulge 400 is larger than the inner diameter of the third seal ring 40, that is, a step-shaped structure is formed between the inner ring of the seal ring bulge 400 and the inner ring of the third seal ring 40, two third seal rings 40 are fixedly sleeved on the thickness alternating region 12 in a manner that the seal ring bulges 400 are opposite to each other and are connected, that is, two third seal rings 40 are sleeved on the cutter bar 1 and are fixed, wherein the seal ring bulge 400 on one third seal ring 40 faces the seal ring bulge 400 on the other third seal ring 40, and the two seal ring bulges 400 are connected, so that after the two third seal rings 40 are sleeved on the cutter bar 1, an accommodating space is formed between the inner rings of the two seal ring bulges 400 and the outer wall of the cutter bar 1, the space is used for installing the O-shaped seal ring 41, and when the cutter bar 1 is inserted into the cutter bar assembly, the seal ring protrusion 400 of the third seal ring 40 prevents the O-ring 41 from being carried out of the third seal ring 40. Therefore, the problem of air tightness of an annular space formed by the cutter bar 1 and the inner pipe in the cutter pipe assembly is solved, and the function of reusing the cutter bar 1 can be achieved. The structure forms an extrusion type sealing structure, elastic deformation is generated by the O-shaped sealing ring 41, the contact pressure of the O-shaped sealing ring is larger than the internal pressure of the sealed cutter pipe assembly, and leakage is effectively prevented.

In a further improvement, as shown in fig. 1 to 3, the seal ring protrusion 400 is a protrusion extending axially from the outer edge of the third seal ring 40, which ensures that the third seal ring 40 does not have a step at the outer ring position, and a good seal can be formed after the tool holder 1 is installed in the tool tube, thereby maintaining a good sealing effect. The sealing ring bulge 400 is of a wave-shaped structure and has a plurality of wave crests at radially symmetrical positions, for example, 2 wave crests, that is, the sealing ring bulge 400 is in a high-low state in the circumferential direction, and has a wave crest structure on one side, so that another wave crest structure exists at a position radially symmetrical to the position, and the two wave crests are in central symmetry, so that when two third sealing rings 40 are connected, the wave crests can be connected at the positions of the wave crests, or the wave crest on one third sealing ring 40 corresponds to the position of the wave trough on the other third sealing ring 40, so that an O-shaped sealing ring 41 can be better installed between the two third sealing rings 40, and at the moment, the two third sealing rings 40 can be connected in a butting manner or in a fixed connection manner at an inner ring, for example, the two third sealing rings 40 are fixed with the cutter arbor 1 through in-mold injection molding, and the two third sealing rings 40 are in a butting state at the positions of an outer ring, when the O-shaped sealing ring 41 needs to be installed, the sealing ring bulge 400 is extruded to deform, then the O-shaped sealing ring 41 is clamped into a containing cavity formed between the two sealing ring bulges 400 and the cutter bar 1, when the cutter tube assembly is inserted, the compression deformation is closely matched with the inner wall of the cutter tube assembly to play a role in sealing, so that the O-shaped sealing ring 41 is installed, the position of the O-shaped sealing ring is fixed, meanwhile, when the cutter tube assembly slides, the O-shaped sealing ring 41 cannot be taken out of the containing cavity, when the O-shaped sealing ring 41 needs to be replaced, the outer rings of the two third sealing rings 40 are manually extruded to be broken, the O-shaped sealing ring 41 is taken out, and the cutter bar 1 can be repeatedly used.

Further improvement, as shown in fig. 1 and 4, be provided with the inner wall recess 30 around 3 a week of second sealing washer on the inside wall of second sealing washer 3, be provided with on the second coupling district 13 can with the inner wall recess 30 interference fit radially around the cutter arbor of 1 a week of cutter arbor protruding, interference fit is at the used repeatedly in-process, second sealing washer 3 just can not drop, the corresponding thickness that is in inner wall recess 30 both sides part of second sealing washer 3 simultaneously, just can be according to the actual demand of use, two parts thickness is the same or the thick state of one side thin, can be better cooperate with cutter arbor 1, improve the output of vibration energy, reinforcing cutting effect.

In a further improvement, as shown in fig. 1, 5 and 6, the first seal ring 2 is provided with seal ring through holes 20 penetrating through the side wall of the first seal ring 2 at two radially symmetrical positions, that is, the seal ring through holes 20 are provided on the first seal ring 2 and are symmetrically located at two ends in the same radial direction, the first coupling region 11 is provided with a cutter bar through hole penetrating through the side wall of the cutter bar 1 in the radial direction, the cutter bar through hole is provided in the first coupling region 11 of the cutter bar 1 and penetrates through the side wall of the cutter bar 1, a rotation stopping shaft 5 having an i-shaped structure is installed in the cutter bar through hole, two ends of the rotation stopping shaft 5 extend out of the cutter bar through hole, the first seal ring 2 is sleeved on the cutter bar 1, two ends of the rotation stopping shaft 5 correspondingly penetrate through the two seal ring through holes 20, that is, the rotation stopping shaft 5 is installed in the cutter bar through hole, and the portions of the two ends of the rotation stopping shaft 5 larger than the diameter of the cutter bar through hole serve as stoppers, make and end pivot 5 can not fall out from the cutter arbor through-hole, it can with cutter arbor 1 and end pivot 5 through mould plastics in the mould fixed when production, earlier with first sealing washer 2 cover on cutter arbor 1 during the use, then move to the position at end pivot 5 place, make the both ends of ending pivot 5 correspond pass two sealing washer through-holes 20, just fixed first sealing washer 2 is in first coupling district 11, insert behind the sword pipe subassembly, the both ends of end pivot 5 will be connected on the inner wall of duct subassembly and can be fixed, such structure, the impedance among the cutter arbor 1 performance parameter has been reduced, and the technology of moulding plastics in the mould can fasten end pivot 5 and cutter arbor 1 effectively, can not take place to become flexible and squint in the used repeatedly process. The circumference of following first sealing washer 2 on the outer wall of first sealing washer 2 still is provided with and sealing washer through-hole 20 looks spaced outer wall recess 21, that is to say all is provided with outer wall recess 21 in the position between two adjacent sealing washer through-holes 20, and when inserting the sword pipe subassembly, the terminal surface of the cell wall of outer wall recess 21 just forms a plurality of contact surfaces with the sword pipe inner wall, improves sealed performance, also makes the more firm that cutter arbor 1 is connected with the sword pipe subassembly moreover.

In a further improvement, as shown in fig. 1, the first coupling zone 11 and the second coupling zone 13 are connected with the thick structure in the thick-thin alternating zone 12, so that the stress between the coupling zones and the thick-thin alternating zone is not too large, a diameter difference is established, and the fracture of the cutter bar is effectively enriched.

It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.

Claims

1. A cutter arbor seal structure which characterized in that: comprises a cutter bar, the cutter bar comprises a tail part, a first coupling area, a thickness alternating area and a second coupling area which are sequentially connected and form a cylindrical shape and have the same axial lead, the thickness alternating area is composed of cylinders with different diameters in an alternating mode, a first sealing ring is detachably sleeved on the first coupling area, a second sealing ring is detachably sleeved on the second coupling area, a sealing assembly is sleeved on the thickness alternating area, the sealing component comprises two connected third sealing rings and an O-shaped sealing ring which is detachably arranged between the two third sealing rings, one end surface of the third sealing ring extends along the axial direction thereof with a sealing ring bulge which surrounds the third sealing ring for a circle, the raised inner diameter of the sealing ring is larger than that of the third sealing rings, and the two third sealing rings are fixedly sleeved on the thickness alternation area in a mode that the sealing rings are raised and opposite and are connected.

2. The tool bar sealing structure according to claim 1, wherein the sealing ring protrusion is a protrusion extending axially from an outer edge of the third sealing ring.

3. The tool bar sealing structure according to claim 1, wherein the sealing ring is raised in a wave-shaped structure and has a plurality of wave crests in radially symmetrical positions.

4. The cutter bar sealing structure as claimed in claim 1, wherein the inner side wall of the second sealing ring is provided with an inner wall groove which surrounds the second sealing ring for a circle, and the second coupling region is provided with a cutter bar protrusion which can be in interference fit with the inner wall groove and radially surrounds the cutter bar for a circle.

5. The cutter bar sealing structure according to claim 1, wherein the first sealing ring is provided with sealing ring through holes penetrating through the side wall of the first sealing ring at two radially symmetrical positions, the first coupling region is provided with a cutter bar through hole penetrating through the side wall of the cutter bar in the radial direction, a rotation stopping shaft which is in an I-shaped structure and has two ends extending out of the cutter bar through hole and two ends with diameters larger than the diameter of the cutter bar through hole is installed in the cutter bar through hole, the first sealing ring is sleeved on the cutter bar, and the two ends of the rotation stopping shaft correspondingly penetrate through the two sealing ring through holes.

6. The cutter bar sealing structure as claimed in claim 5, wherein an outer wall groove spaced from the sealing ring through hole is further provided on the outer wall of the first sealing ring along the circumferential direction of the first sealing ring.

7. The cutter bar sealing structure of claim 1, wherein the diameters of all the thick structures in the thick-thin alternating region are equal, and the diameters of all the thin structures are also equal.

8. The cutter bar sealing structure of claim 1, wherein the first coupling area and the second coupling area are both connected with the thick structure in the alternating thick and thin area.

9. The tool bar sealing structure of claim 1, wherein a tool bit is further connected to the front end of the second coupling region.

10. The cutter bar sealing structure of claim 1, wherein a fillet transition area is arranged between the thick structure and the thin structure in the thick-thin alternating area.