CN115444494B - A saw blade quick-installation structure for medical reciprocating saw - Google Patents
A saw blade quick-installation structure for medical reciprocating saw Download PDFInfo
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- CN115444494B CN115444494B CN202211005329.8A CN202211005329A CN115444494B CN 115444494 B CN115444494 B CN 115444494B CN 202211005329 A CN202211005329 A CN 202211005329A CN 115444494 B CN115444494 B CN 115444494B
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- 230000006835 compression Effects 0.000 claims description 3
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- 230000013011 mating Effects 0.000 claims 2
- 238000003754 machining Methods 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract 1
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- 235000014676 Phragmites communis Nutrition 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 4
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- 101100244014 Neurospora crassa (strain ATCC 24698 / 74-OR23-1A / CBS 708.71 / DSM 1257 / FGSC 987) ppi-5 gene Proteins 0.000 description 2
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- 230000007774 longterm Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
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- 210000000988 bone and bone Anatomy 0.000 description 1
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- 230000004048 modification Effects 0.000 description 1
- 230000000399 orthopedic effect Effects 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/14—Surgical saws
- A61B17/142—Surgical saws with reciprocating saw blades, e.g. with cutting edges at the distal end of the saw blades
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Abstract
本发明属于医用往复锯技术领域，具体涉及一种医用往复锯的锯片快装结构。针对现有医用往复锯的锯片拆装不方便或者锯片固定不够可靠的不足，本发明采用如下技术方案：一种医用往复锯的锯片快装结构，包括：往复锯片，包括切割部、径向定位部和轴向防脱部；内筒，包括、径向定位槽、轴向容纳槽、弧形槽和周向定位槽；外筒，可转动的套设于所述内筒外，包括中心孔、边缘槽和径向台阶孔；顶钉；弹力件。本发明的医用往复锯的锯片快装结构的有益效果是：只需转动外筒即可实现往复锯片的拆装，操作方便；通过顶钉和弹力件可以有效保证未受外力时外筒不会转动，确保往复锯片不会脱出。
The present invention belongs to the technical field of medical reciprocating saws, and specifically relates to a saw blade quick-installation structure of a medical reciprocating saw. In view of the shortcomings of the inconvenience of disassembling and assembling the saw blade of the existing medical reciprocating saw or the unreliable fixation of the saw blade, the present invention adopts the following technical scheme: a saw blade quick-installation structure of a medical reciprocating saw, comprising: a reciprocating saw blade, including a cutting portion, a radial positioning portion and an axial anti-slip portion; an inner cylinder, including a radial positioning groove, an axial receiving groove, an arc groove and a circumferential positioning groove; an outer cylinder, rotatably sleeved on the outside of the inner cylinder, including a center hole, an edge groove and a radial step hole; a top pin; and an elastic member. The beneficial effects of the saw blade quick-installation structure of the medical reciprocating saw of the present invention are: the reciprocating saw blade can be disassembled and assembled by simply rotating the outer cylinder, which is easy to operate; the top pin and the elastic member can effectively ensure that the outer cylinder will not rotate when not subjected to external force, thereby ensuring that the reciprocating saw blade will not fall out.
Description
Technical Field
The invention belongs to the technical field of medical reciprocating saws, and particularly relates to a saw blade quick-mounting structure of a medical reciprocating saw.
Background
Medical reciprocating saw is a more common surgical equipment of orthopedics, including host computer and saw head, saw head includes rotation connecting piece, reciprocating rod and saw bit, and the saw bit is connected in the reciprocating rod, rotates the connecting piece and rotates under motor drive, rotates the connecting piece and drives reciprocating rod through drive assembly such as bevel gear group and reciprocate to drive the saw bit and reciprocate in order to cut bone tissue.
During surgery, it is sometimes necessary to quickly replace the saw blade, and therefore, the saw blade of existing medical reciprocating saws is often detachably connected. In the prior art, a saw blade is usually matched with a lock pin by adopting a reed, and the reed is compressed/released in a pressing mode, so that the lock pin is driven to move, and the locking/unlocking state of the saw blade is switched. However, the mode keeps the locking of the saw blade through the elasticity of the reed, the dependence on the reed is extremely high, the assembly and maintenance are inconvenient, the reed is difficult to manufacture, the reed has the risk of falling into the reciprocating bar seam, and the pressing mechanism and the lock pin are not reset after being pressed, so that the locking/releasing of the saw blade has instability and the normal operation is influenced. In addition, in the replacement process of the saw blade of part of medical reciprocating saw, tools such as a chuck key are needed, so that the operation is inconvenient, and the operator is not facilitated to grasp the tightening degree.
Disclosure of Invention
Aiming at the defects that the existing medical reciprocating saw is inconvenient to assemble and disassemble or the saw blade is not fixed reliably enough, the invention provides a saw blade fast-assembling structure of the medical reciprocating saw, which realizes the fast installation of the saw blade. Further, the reliable fixation of the saw blade is ensured, and the use safety is ensured.
In order to achieve the purpose, the invention adopts the following technical scheme that the saw blade fast-assembling structure of the medical reciprocating saw comprises:
the reciprocating saw blade comprises a cutting part and a radial positioning part, and an axial anti-falling part is formed by extending radially outwards between the cutting part and the radial positioning part;
the inner barrel comprises a first barrel body, a radial positioning groove matched with the radial positioning part and an axial containing groove for containing the axial anti-falling part are formed in the first barrel body, an arc-shaped groove is further formed in the outer surface of the first barrel body, and a circumferential positioning groove is formed in at least one end of the arc-shaped groove in a radial inward manner;
The outer cylinder is rotatably sleeved outside the inner cylinder and is switched between a disassembly position and a working position through rotation, the outer cylinder comprises a second cylinder body, the second cylinder body is provided with a central hole for the radial positioning part of the reciprocating saw blade to pass through and an edge groove for the axial anti-falling part of the reciprocating saw blade to pass through, the radial dimension of the central hole is smaller than that of the axial anti-falling part of the reciprocating saw blade, and the second cylinder body is provided with a radial step hole;
The top nail is arranged in the radial step hole and comprises a small-diameter part at the inner end and a large-diameter part at the outer end, and the small-diameter part at the inner end of the top nail passes through the radial step hole and enters the arc-shaped groove of the inner barrel;
an elastic piece which generates a radial inward acting force on the top nail;
When the outer cylinder is in a disassembly and assembly position, the edge groove of the second cylinder body of the outer cylinder is at least partially overlapped with the axial projection of the axial accommodating groove of the first cylinder body of the inner cylinder, so that the reciprocating saw blade can enter and exit;
when the outer cylinder is in a working position, the edge groove of the second cylinder body of the outer cylinder is staggered with the axial containing groove of the first cylinder body of the inner cylinder, the outer cylinder limits the axial anti-falling part of the reciprocating saw blade to prevent the reciprocating saw blade from falling off, and meanwhile, the top nail is positioned in the circumferential positioning groove under the action of the elastic piece.
The invention discloses a saw blade quick-mounting structure of a medical reciprocating saw, which comprises a reciprocating saw blade, an inner barrel, an outer barrel, a top nail and an elastic piece, wherein when the outer barrel is in a mounting and dismounting position, an edge groove of the second barrel of the outer barrel is at least partially overlapped with an axial containing groove of the first barrel of the inner barrel, the reciprocating saw blade can enter and exit, when the outer barrel is in a working position, the edge groove of the second barrel of the outer barrel is staggered with the axial containing groove of the first barrel of the inner barrel, the outer barrel limits an axial anti-falling part of the reciprocating saw blade to prevent the reciprocating saw blade from falling off, meanwhile, the top nail is positioned in a circumferential locating groove under the action of the elastic piece, when the saw blade is required to be mounted, the saw blade can be axially inserted into the inner barrel only by rotating the outer barrel along a first direction, the edge groove of the outer barrel is aligned with the axial containing groove of the inner barrel, after the saw blade is inserted into the position, the top nail can reach the circumferential locating groove along the circumferential locating groove, namely the position, when the saw blade is required to be dismounted, the acting force of the elastic piece only needs to rotate the outer barrel along the second direction, so that the top nail can be circumferentially removed from the circumferential locating groove along the axial locating groove along the arc locating groove, and the other end can be aligned with the axial containing groove along the arc groove.
As an improvement, the first cylinder body of the inner cylinder also extends radially outwards to form an axial stress lug, and the second cylinder body of the outer cylinder is provided with an axial stress groove matched with the axial stress lug. When the axial stress lugs and the axial stress grooves are not arranged, and the axial force transmission of the force between the inner cylinder and the outer cylinder is realized by the top nails and the arc grooves of the inner cylinder, after a period of use, the arc grooves of the inner cylinder form axial permanent grooves under the long-term action of the top nails, and the grooves make the outer cylinder difficult to rotate. The axial stress lug is formed on the inner cylinder, and the axial stress groove is formed on the outer cylinder, so that the axial stress is borne by the axial stress lug and the axial stress groove instead of the top nail and the arc-shaped groove of the inner cylinder, and the arc-shaped groove of the inner cylinder is prevented from deforming. After practical verification, the arc-shaped groove of the inner cylinder is proved to have no obvious deformation after the axial stress lug and the axial stress groove are arranged.
As improvement, the fit clearance between the axial stress groove and the axial stress lug is smaller than the fit clearance between the top nail and the arc-shaped groove, so that the transmission of axial force between the inner cylinder and the outer cylinder is realized by the axial stress lug of the axial stress groove.
As improvement, the axial stress groove is a 360-degree arc groove, one end of the second cylinder body of the outer cylinder, which is far away from the reciprocating saw blade, is provided with an ear groove for the axial stress ear to pass through, and the axial stress ear is provided with a pair of axial stress ears.
As an improvement, the axial dimension of the axial accommodating groove of the first cylinder body of the inner cylinder is matched with the axial dimension of the axial anti-falling part of the reciprocating saw blade, and when the reciprocating saw blade is arranged in the inner cylinder, the axial accommodating groove limits the inner end position of the axial anti-falling part of the reciprocating saw blade, so that the proper mounting position of the reciprocating saw blade is ensured.
The outer cylinder rotates back and forth, the rotation angle of the outer cylinder is 90 degrees, the axial anti-falling part and the axial containing groove are in a pair, the top nail, the arc-shaped groove and the elastic piece are two, the two ends of the arc-shaped groove are radially inwards formed into a circumferential positioning groove, and the circumferential positioning groove is a spherical groove.
As an improvement, the outer cylinder comprises a small hole section close to the reciprocating saw blade and a large hole section far away from the reciprocating saw blade, and the aperture of the small hole section is smaller than the size of the end part of the inner cylinder close to one end of the reciprocating saw blade.
As an improvement, the inner cylinder is provided with an anti-rotation groove connected with a reciprocating rod of the medical reciprocating saw, the side wall of the anti-rotation groove is also provided with a rivet hole, a rivet is arranged in the rivet hole, the inner cylinder is fixedly connected with the reciprocating rod through the rivet, and the outer cylinder is provided with a hole for the rivet to pass through.
As an improvement, the saw blade fast-assembling structure of the medical reciprocating saw further comprises an outer sleeve arranged outside the outer cylinder, and the outer end of the elastic piece is abutted to the outer sleeve.
As an improvement, the inner side of the outer sleeve is provided with a mounting groove for positioning the elastic piece, the outer side of the outer sleeve is provided with a process hole for processing the mounting groove, and the elastic piece is a compression spring.
The saw blade quick-mounting structure of the medical reciprocating saw has the advantages that the reciprocating saw blade can be dismounted only by rotating the outer cylinder, the operation is convenient, the outer cylinder can be effectively prevented from rotating when no external force is applied through the ejector pin and the elastic piece, and the reciprocating saw blade is prevented from falling off.
Drawings
Fig. 1 is a schematic structural view of a saw head of a medical reciprocating saw according to a first embodiment of the present invention (when an outer cylinder is in an operating position).
Fig. 2 is a cross-sectional view of a saw head of a medical reciprocating saw according to a first embodiment of the present invention (the outer barrel is shown in an operative position with only a portion of the reciprocating saw blade).
Fig. 3 is an exploded view of the saw head of the medical reciprocating saw according to the first embodiment of the present invention.
Fig. 4 is a schematic view of the structure of a reciprocating saw blade of a medical reciprocating saw according to the first embodiment of the present invention.
Fig. 5 and 6 are schematic views of different angles of an inner barrel of a medical reciprocating saw according to a first embodiment of the present invention.
Fig. 7 and 8 are schematic views showing different angles of the outer cylinder of the medical reciprocating saw according to the first embodiment of the present invention.
Fig. 9 is a schematic structural view of a jacket of a medical reciprocating saw according to a first embodiment of the present invention.
In the figure, 1, a reciprocating saw blade, 11, a cutting part, 12, a radial positioning part, 13, and an axial anti-falling part;
2. An inner cylinder; 21, a first cylinder body, 22, a radial positioning groove, 23, an axial containing groove, 24, an arc-shaped groove, 25, a circumferential positioning groove, 26, an axial stress lug, 27 and an anti-rotation groove;
3. The outer cylinder, 31, a second cylinder, 32, a central hole, 33, an edge groove, 34, a radial step hole, 35, an ear groove 36 and an axial stress groove;
4. Pushing nails;
5. an elastic member;
6. 61, mounting grooves 62 and process holes;
7. and (5) a rivet.
Detailed Description
The technical solutions of the inventive embodiments of the present invention will be explained and illustrated below with reference to the drawings of the inventive embodiments of the present invention, but the following embodiments are only preferred embodiments of the inventive embodiments of the present invention, not all. Based on the examples in the implementation manner, other examples obtained by a person skilled in the art without making any inventive effort fall within the scope of protection created by the present invention.
Referring to fig. 1 to 9, a saw blade quick-mounting structure of a medical reciprocating saw of the present invention includes:
the reciprocating saw blade comprises a cutting part and a radial positioning part, and an axial anti-falling part is formed by extending radially outwards between the cutting part and the radial positioning part;
the inner barrel comprises a first barrel body, a radial positioning groove matched with the radial positioning part and an axial containing groove for containing the axial anti-falling part are formed in the first barrel body, an arc-shaped groove is further formed in the outer surface of the first barrel body, and a circumferential positioning groove is formed in at least one end of the arc-shaped groove in a radial inward manner;
The outer cylinder is rotatably sleeved outside the inner cylinder and is switched between a disassembly position and a working position through rotation, the outer cylinder comprises a second cylinder body, the second cylinder body is provided with a central hole for the radial positioning part of the reciprocating saw blade to pass through and an edge groove for the axial anti-falling part of the reciprocating saw blade to pass through, the radial dimension of the central hole is smaller than that of the axial anti-falling part of the reciprocating saw blade, and the second cylinder body is provided with a radial step hole;
The top nail is arranged in the radial step hole and comprises a small-diameter part at the inner end and a large-diameter part at the outer end, and the small-diameter part at the inner end of the top nail passes through the radial step hole and enters the arc-shaped groove of the inner barrel;
an elastic piece which generates a radial inward acting force on the top nail;
When the outer cylinder is in a disassembly and assembly position, the edge groove of the second cylinder body of the outer cylinder is at least partially overlapped with the axial projection of the axial accommodating groove of the first cylinder body of the inner cylinder, so that the reciprocating saw blade can move radially;
When the outer cylinder is in a working position, the edge groove of the second cylinder body of the outer cylinder is staggered with the axial containing groove of the first cylinder body of the inner cylinder, the outer cylinder limits the axial displacement of the axial anti-falling part of the reciprocating saw blade so as to prevent the reciprocating saw blade from falling off, and meanwhile, the top nail is positioned in the circumferential positioning groove under the action of the elastic piece.
The invention discloses a saw blade quick-mounting structure of a medical reciprocating saw, which comprises a reciprocating saw blade, an inner barrel, an outer barrel, a top nail and an elastic piece, wherein when the outer barrel is in a mounting and dismounting position, an edge groove of the second barrel of the outer barrel is at least partially overlapped with an axial containing groove of the first barrel of the inner barrel, the reciprocating saw blade can enter and exit, when the outer barrel is in a working position, the edge groove of the second barrel of the outer barrel is staggered with the axial containing groove of the first barrel of the inner barrel, the outer barrel limits an axial anti-falling part of the reciprocating saw blade to prevent the reciprocating saw blade from falling off, meanwhile, the top nail is positioned in a circumferential locating groove under the action of the elastic piece, when the saw blade is required to be mounted, the saw blade can be axially inserted into the inner barrel only by rotating the outer barrel along a first direction, the edge groove of the outer barrel is aligned with the axial containing groove of the inner barrel, after the saw blade is inserted into the position, the top nail can reach the circumferential locating groove along the circumferential locating groove, namely the position, when the saw blade is required to be dismounted, the acting force of the elastic piece only needs to rotate the outer barrel along the second direction, so that the top nail can be circumferentially removed from the circumferential locating groove along the axial locating groove along the arc locating groove, and the other end can be aligned with the axial containing groove along the arc groove.
Example 1
Referring to fig. 1 to 9, a saw blade quick-mounting structure of a medical reciprocating saw according to an embodiment of the present invention includes:
the reciprocating saw blade 1 comprises a cutting part 11 and a radial positioning part 12, wherein an axial anti-falling part 13 is formed by extending radially outwards between the cutting part 11 and the radial positioning part 12, the axial anti-falling part 13 protrudes outwards from the radial positioning part 12, and the width of the axial anti-falling part 13 is larger than that of the radial positioning part 12;
The inner cylinder 2 comprises a first cylinder 21, wherein a radial positioning groove 22 matched with the radial positioning part 12 and an axial containing groove 23 for containing the axial anti-falling part 13 are formed in the first cylinder 21, an arc groove 24 is formed on the outer surface of the first cylinder 21, and a circumferential positioning groove 25 is formed at least at one end of the arc groove 24 radially inwards;
the outer cylinder 3 is rotatably sleeved outside the inner cylinder 2 and is switched between a disassembly position and a working position through rotation, and comprises a second cylinder 31, wherein the second cylinder 31 is provided with a central hole 32 for the radial positioning part 12 of the reciprocating saw blade 1 to pass through and an edge groove 33 for the axial anti-drop part 13 of the reciprocating saw blade 1 to pass through, the radial dimension of the central hole 32 is smaller than that of the axial anti-drop part 13 of the reciprocating saw blade 1, and the second cylinder 31 is provided with a radial step hole 34;
A top pin4, which is arranged in the radial step hole 34 and comprises a small diameter part at the inner end and a large diameter part at the outer end, wherein the small diameter part at the inner end of the top pin4 passes through the radial step hole 34 and enters the circumferential positioning groove 25 of the inner cylinder 2;
An elastic member 5 for generating a radially inward force on the top pin 4;
when the outer cylinder 3 is in the dismounting position, the edge groove 33 of the second cylinder 31 of the outer cylinder 3 is at least partially overlapped with the axial projection of the axial accommodating groove 23 of the first cylinder 21 of the inner cylinder 2 so as to enable the reciprocating saw blade 1 to enter and exit;
When the outer cylinder 3 is in the working position, the edge groove 33 of the second cylinder 31 of the outer cylinder 3 is staggered from the axial accommodating groove 23 of the first cylinder 21 of the inner cylinder 2, the outer cylinder 3 limits the axial anti-falling part 13 of the reciprocating saw blade 1 to prevent the reciprocating saw blade 1 from falling out, and meanwhile, the top nails 4 are positioned in the circumferential positioning grooves 25 under the action of the elastic piece 5.
The radial depth of the circumferential positioning groove 25 is greater than that of the arc-shaped groove 24, the elastic piece 5 can generate elastic deformation, when the outer cylinder 3 is rotated, the elastic piece 5 is further compressed, the top nails 4 can be removed from the circumferential positioning groove 25, and accordingly the outer cylinder 3, the top nails 4 and the elastic piece 5 can integrally rotate.
In this embodiment, the first cylinder 21 of the inner cylinder 2 further extends radially outwards to form an axial force receiving lug 26, and the second cylinder 31 of the outer cylinder 3 is provided with an axial force receiving groove 36 matched with the axial force receiving lug 26. When the axial force transmission of the force between the inner cylinder 2 and the outer cylinder 3 is realized by the top nails 4 and the arc-shaped grooves 24 of the inner cylinder 2 without the axial force receiving lugs 26 and the axial force receiving grooves 36, after a period of use, the arc-shaped grooves 24 of the inner cylinder 2 form axial permanent grooves under the long-term action of the top nails 4, and the grooves make the outer cylinder 3 difficult to rotate. By forming the axial force receiving lugs 26 on the inner cylinder 2 and the axial force receiving grooves 36 on the outer cylinder 3, the axial force is received by the axial force receiving lugs 26 and the axial force receiving grooves 36 instead of the top nails 4 and the arc-shaped grooves 24 of the inner cylinder 2, thereby preventing the arc-shaped grooves 24 of the inner cylinder 2 from being deformed. After practical verification, it is proved that the arc-shaped groove 24 of the inner cylinder 2 is not obviously deformed after the axial stress lugs 26 and the axial stress grooves 36 are arranged.
In this embodiment, the fit clearance between the axial force-receiving slot 36 and the axial force-receiving lug 26 is smaller than the fit clearance between the top pin 4 and the arc-shaped slot 24, that is, no matter which end of the axial direction of the axial force-receiving lug 26 abuts against the side wall of the axial force-receiving slot 36, a clearance exists between the top pin 4 and the side wall of the arc-shaped slot 24 of the inner cylinder 2, so as to ensure that the axial force transmission between the inner cylinder 2 and the outer cylinder 3 is realized by the axial force-receiving lug 26 of the axial force-receiving slot 36, and the top pin 4 and the arc-shaped slot 24 bear no or almost no axial force.
In this embodiment, the axial stress groove 36 is a 360 ° circular arc groove.
In this embodiment, an ear slot 35 for the axial force ear 26 to pass through is formed at one end of the second cylinder 31 of the outer cylinder 3 away from the reciprocating saw blade 1.
In this embodiment, the pair of axial force-receiving lugs 26 is provided to uniformly transfer force between the inner cylinder 2 and the outer cylinder 3.
In this embodiment, the axial dimension of the axial accommodating groove 23 of the first cylinder 21 of the inner cylinder 2 is adapted to the axial dimension of the axial anti-drop portion 13 of the reciprocating saw blade 1, and when the reciprocating saw blade 1 is installed in the inner cylinder 2, the axial accommodating groove 23 limits the inner end position of the axial anti-drop portion 13 of the reciprocating saw blade 1, so as to ensure that the installation position of the reciprocating saw blade 1 is appropriate.
In this embodiment, the front end of the axial receiving groove 23 is chamfered so that the reciprocating saw blade 1 can be easily inserted.
In this embodiment, the outer cylinder 3 is switched between the removal position and the working position by reciprocal rotation.
In this embodiment, the rotation angle of the outer cylinder 3 is 90 °. The inner cylinder 2 is fixedly connected with the reciprocating rod through the rivet 7, and the rotation angle of the outer cylinder 3 is 90 degrees, so that the detachability of the rivet 7 is not affected.
In other embodiments, when the fixed connection between the inner cylinder 2 and the reciprocating rod adopts other structures, the outer cylinder 3 can also adopt a 360-degree rotating structure, that is, the arc-shaped groove 24 on the inner cylinder 2 is a 360-degree circular groove.
In this embodiment, the present invention is applicable to a variety of applications. The outer cylinder 3 has a small diameter section and a large diameter section, the large diameter section is farther away from the reciprocating saw blade 1 than the small diameter section, the top nail 4 is arranged on the large diameter section, the large diameter section is provided with a hole for the rivet 7 to pass through, and the large diameter section is provided with an ear groove 35 and an axial stress groove 36.
In this embodiment, the axial anti-falling portion 13 and the axial receiving groove 23 are formed as a pair, so that the reciprocating saw blade 1 and the inner cylinder 2 are uniformly stressed.
In this embodiment, the two top nails 4, the two arc-shaped grooves 24 and the two elastic members 5 are all arranged, so that the parts are uniformly stressed.
In this embodiment, the two ends of the arc-shaped slot 24 are radially inward formed with a circumferential positioning slot 25, so that the outer cylinder 3 cannot easily rotate when in the disassembly position, and the disassembly and assembly of the reciprocating saw blade 1 are facilitated.
In this embodiment, the circumferential positioning groove 25 is a spherical groove, so that the top nail 4 can smoothly enter and exit the circumferential positioning groove 25.
In this embodiment, the outer cylinder 3 includes a small hole section near the reciprocating saw blade 1 and a large hole section far from the reciprocating saw blade 1, and the hole diameter of the small hole section is smaller than the size of the end of the inner cylinder 2 near one end of the reciprocating saw blade 1.
In this embodiment, the inner cylinder 2 is provided with an anti-rotation groove 27 for connecting with a reciprocating rod of the medical reciprocating saw, a rivet 7 hole is further formed in the side wall of the anti-rotation groove 27, a rivet 7 is arranged in the rivet 7 hole, the inner cylinder 2 is fixedly connected with the reciprocating rod through the rivet 7, and a hole for the rivet 7 to pass through is formed in the outer cylinder 3.
In this embodiment, the anti-rotation groove 27 and the radial positioning groove 22 axially penetrate through the inner cylinder 2, which is convenient for processing and reduces the weight of the inner cylinder 2.
In this embodiment, the saw blade fast-assembling structure of the medical reciprocating saw further includes a casing 6 disposed outside the outer cylinder 3, and the outer end of the elastic member 5 abuts against the casing 6.
In this embodiment, an installation groove 61 for positioning the elastic member 5 is formed on the inner side of the outer sleeve 6, a process hole 62 for processing the installation groove 61 is formed on the outer side of the outer sleeve 6, and the elastic member 5 is a compression spring.
In this embodiment, the upper outer surface of the outer cylinder 3 forms two operation planes to facilitate rotation of the outer cylinder 3.
In this embodiment, the inner cylinder 2 is fixedly connected to the reciprocating lever, so that the inner cylinder 2 does not rotate when the outer cylinder 3 is rotated.
In this embodiment, a decorative cover is further provided outside the outer sleeve 6, and covers the outer sleeve 6.
The saw blade quick-mounting structure of the medical reciprocating saw has the advantages that the reciprocating saw blade 1 can be dismounted only by rotating the outer cylinder 3, the operation is convenient, the outer cylinder 3 can be effectively prevented from rotating when no external force is applied to the outer cylinder through the top pin 4 and the elastic piece 5, the reciprocating saw blade 1 is prevented from falling off, the outer cylinder 3 is switched between the dismounting position and the working position in a 90-degree reciprocating rotation mode, axial force is transmitted between the inner cylinder 2 and the outer cylinder 3 through the axial force-bearing part and the axial force-bearing groove 36, the top pin 4 and the arc-shaped groove 24 are prevented from bearing the axial force, the arc-shaped groove 24 is prevented from deforming, and smooth rotation of the top pin 4 is ensured.
While the invention has been described in terms of specific embodiments, it will be apparent to those skilled in the art that the invention is not limited to the specific embodiments described. Any modifications which do not depart from the functional and structural principles of the present invention are intended to be included within the scope of the appended claims.
Claims (7)
1. A saw blade fast-assembling structure of a medical reciprocating saw is characterized in that the saw blade fast-assembling structure of the medical reciprocating saw comprises:
the reciprocating saw blade (1) comprises a cutting part (11) and a radial positioning part (12), wherein an axial anti-falling part (13) is formed by extending radially outwards between the cutting part (11) and the radial positioning part (12);
The inner cylinder (2) comprises a first cylinder body (21), a radial positioning groove (22) matched with the radial positioning part (12) and an axial containing groove (23) for containing the axial anti-falling part (13) are formed in the first cylinder body (21), an arc groove (24) is formed in the outer surface of the first cylinder body (21), and a circumferential positioning groove (25) is formed in at least one end of the arc groove (24) in a radial inward mode;
The outer cylinder (3) is rotatably sleeved outside the inner cylinder (2) and is switched between a disassembly position and a working position through rotation, the outer cylinder comprises a second cylinder body (31), a central hole (32) for the radial positioning part (12) of the reciprocating saw blade (1) to pass through and an edge groove (33) for the axial anti-falling part (13) of the reciprocating saw blade (1) to pass through are formed in the second cylinder body (31), the radial size of the central hole (32) is smaller than that of the axial anti-falling part (13) of the reciprocating saw blade (1), and a radial step hole (34) is formed in the second cylinder body (31);
The top nail (4) is arranged in the radial step hole (34) and comprises a small-diameter part at the inner end and a large-diameter part at the outer end, and the small-diameter part at the inner end of the top nail (4) passes through the radial step hole (34) and enters the arc-shaped groove (24) of the inner cylinder (2);
an elastic piece (5) which generates a radial inward acting force on the top nail (4);
When the outer cylinder (3) is in a disassembly position, the edge groove (33) of the second cylinder body (31) of the outer cylinder (3) is at least partially overlapped with the axial projection of the axial accommodating groove (23) of the first cylinder body (21) of the inner cylinder (2) so as to enable the reciprocating saw blade (1) to enter and exit;
When the outer cylinder (3) is in the working position, the edge groove (33) of the second cylinder body (31) of the outer cylinder (3) is staggered with the axial accommodating groove (23) of the first cylinder body (21) of the inner cylinder (2), the outer cylinder (3) limits the axial anti-falling part (13) of the reciprocating saw blade (1) to prevent the reciprocating saw blade (1) from falling off, and meanwhile, the top nails (4) are positioned in the circumferential positioning grooves (25) under the action of the elastic piece (5);
The first cylinder body (21) of the inner cylinder (2) also radially extends outwards to form an axial stress lug (26), and the second cylinder body (31) of the outer cylinder (3) is provided with an axial stress groove (36) matched with the axial stress lug (26);
The inner cylinder (2) is provided with an anti-rotation groove (27) which is used for being connected with a reciprocating rod of the medical reciprocating saw, the side wall of the anti-rotation groove (27) is also provided with a rivet hole, a rivet (7) is arranged in the rivet hole, the inner cylinder (2) is fixedly connected with the reciprocating rod through the rivet (7), and the outer cylinder (3) is provided with a hole for the rivet (7) to pass through;
the saw blade fast-assembling structure of the medical reciprocating saw further comprises an outer sleeve (6) arranged outside the outer cylinder (3), and the outer end of the elastic piece (5) is abutted to the outer sleeve (6).
2. A quick assembly attachment for a medical reciprocating saw blade as defined in claim 1, wherein said axial force receiving slot (36) and said axial force receiving tab (26) have a smaller mating clearance than a mating clearance between said top pin (4) and said arcuate slot (24).
3. The quick saw blade mounting structure of the medical reciprocating saw of claim 1, wherein the axial stress groove (36) is a 360-degree arc groove, one end, far away from the reciprocating saw blade (1), of the second cylinder body (31) of the outer cylinder (3) is provided with an ear groove (35) for the axial stress ear (26) to pass through, and the axial stress ear (26) is provided with a pair.
4. The quick saw blade mounting structure of a medical reciprocating saw as claimed in claim 1, wherein the axial dimension of the axial receiving groove (23) of the first cylinder body (21) of the inner cylinder (2) is adapted to the axial dimension of the axial anti-drop portion (13) of the reciprocating saw blade (1).
5. The quick saw blade mounting structure of the medical reciprocating saw of claim 1 is characterized in that the outer barrel (3) rotates back and forth, the rotation angle of the outer barrel (3) is 90 degrees, the axial anti-falling part (13) and the axial containing groove (23) are in a pair, the top nail (4), the arc-shaped groove (24) and the elastic piece (5) are two, two ends of the arc-shaped groove (24) are radially inwards provided with circumferential positioning grooves (25), and the circumferential positioning grooves (25) are spherical grooves.
6. A blade quick-mounting structure of a medical reciprocating saw as defined in claim 1, wherein the outer cylinder (3) comprises a small hole section close to the reciprocating saw blade (1) and a large hole section far away from the reciprocating saw blade (1), and the aperture of the small hole section is smaller than the size of the end part of the inner cylinder (2) close to one end of the reciprocating saw blade (1).
7. The quick saw blade mounting structure of the medical reciprocating saw of claim 1, wherein a mounting groove (61) for positioning the elastic piece (5) is formed in the inner side of the outer sleeve (6), a process hole (62) for machining the mounting groove (61) is formed in the outer side of the outer sleeve (6), and the elastic piece (5) is a compression spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211005329.8A CN115444494B (en) | 2022-08-22 | 2022-08-22 | A saw blade quick-installation structure for medical reciprocating saw |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211005329.8A CN115444494B (en) | 2022-08-22 | 2022-08-22 | A saw blade quick-installation structure for medical reciprocating saw |
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| CN115444494A CN115444494A (en) | 2022-12-09 |
| CN115444494B true CN115444494B (en) | 2025-02-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211005329.8A Active CN115444494B (en) | 2022-08-22 | 2022-08-22 | A saw blade quick-installation structure for medical reciprocating saw |
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|---|---|---|---|---|
| CN1178493A (en) * | 1995-03-16 | 1998-04-08 | 罗伯特-博希股份公司 | Compass saw |
| CN110434400A (en) * | 2018-05-04 | 2019-11-12 | 南京德朔实业有限公司 | A kind of reciprocating saw saw blade mounting device and reciprocating saw |
| CN219000437U (en) * | 2022-08-22 | 2023-05-12 | 世源科技(嘉兴)医疗电子有限公司 | Saw head of medical reciprocating saw |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0871842A (en) * | 1994-09-09 | 1996-03-19 | Ryobi Ltd | Cantilever blade holding device for saw |
| CN2644065Y (en) * | 2003-09-05 | 2004-09-29 | 力武电机股份有限公司 | Clamping Mechanism of Saw Blade of Reciprocating Chainsaw |
| CN2885472Y (en) * | 2005-12-13 | 2007-04-04 | 南京德朔实业有限公司 | Saw bit holding device for reciprocating saw |
| CN100579700C (en) * | 2005-12-24 | 2010-01-13 | 朱文华 | Jig saw tool automatic locking device |
| CN100453227C (en) * | 2006-12-15 | 2009-01-21 | 常州赛迪电气制造有限公司 | Saw blade fixture |
| CN100453226C (en) * | 2006-12-15 | 2009-01-21 | 常州赛迪电气制造有限公司 | Saw clamping device |
| CN109332810B (en) * | 2018-10-27 | 2023-12-26 | 浙江亚特电器股份有限公司 | Quick-change chuck and reciprocating saw |
| CN216317818U (en) * | 2021-10-29 | 2022-04-19 | 重庆西山科技股份有限公司 | Saw blade mounting assembly for medical reciprocating saw and medical reciprocating saw |
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2022
- 2022-08-22 CN CN202211005329.8A patent/CN115444494B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1178493A (en) * | 1995-03-16 | 1998-04-08 | 罗伯特-博希股份公司 | Compass saw |
| CN110434400A (en) * | 2018-05-04 | 2019-11-12 | 南京德朔实业有限公司 | A kind of reciprocating saw saw blade mounting device and reciprocating saw |
| CN219000437U (en) * | 2022-08-22 | 2023-05-12 | 世源科技(嘉兴)医疗电子有限公司 | Saw head of medical reciprocating saw |
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| CN115444494A (en) | 2022-12-09 |
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