Water-cooled bone saw

Abstract

The present invention discloses a water-cooled bone saw, including a saw grinding device and a support rod assembly, wherein the saw grinding device includes a saw blade, one end of the saw blade is provided with a saw handle, and a plane section is provided on the saw handle; the support rod assembly includes a connecting sleeve sleeved on an outer tube, the saw handle is inserted in the connecting sleeve, a water hole is formed between the inner wall of the connecting sleeve and the saw handle, the insertion end of the saw handle is connected with a connecting shaft, the connecting shaft passes through the outer tube and is connected to the handle, and a water outlet channel is formed between the corresponding positions of the support rod assembly and the handle, and between the corresponding parts of the support rod assembly, and one end of the water outlet channel is also connected to the water outlet hole. The present invention drives the saw blade to reciprocate in the axial direction by a transmission device, and cools the saw blade by cooling water, thereby performing the operation of cutting bone tissue, and has a simple structure, convenient operation, simplified installation structure, reduced occupied space, high stability, and good safety.

Description

Technical Field

[0001] The invention relates to the technical field of medical instruments, and in particular to a water-cooled bone saw. Background Art

[0002] Bone saws are mainly used to remove bone tissue during surgical operations. Current products do not have internal water cooling, which causes the reciprocating mechanism and the blade to easily heat up during use. The increased temperature will not only affect the use of the bone saw, but can also easily damage important soft tissues near the bone tissue, including nerves, thereby reducing the safety of the operation. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a water-cooled bone saw which is convenient for grinding bone tissue and can be water-cooled.

[0004] The technical solution of the present invention is as follows:

[0005] A water-cooled bone saw comprises a sawing device and a support rod assembly, the sawing device comprises a saw blade, one end of the saw blade is provided with a saw handle, the support rod assembly comprises a connecting sleeve sleeved on an outer tube, the saw handle is inserted in the connecting sleeve, a water hole is formed between the inner wall of the connecting sleeve and the saw handle, the insertion end of the saw handle is connected to a connecting shaft, the connecting shaft passes through the outer tube and is connected to a handle provided with a water inlet hole, the support rod assembly also comprises a sleeve fixedly arranged in the outer tube, an open groove is axially arranged on one side of the sleeve, a first fixing sleeve and a second fixing sleeve are sequentially arranged in the sleeve along the water outlet direction, a third fixing sleeve is sleeved in the first fixing sleeve, and a connecting hole communicating with the water inlet hole is provided in the handle. The bottom of the connecting hole is provided with a fixing hole for the third fixing sleeve to be sleeved, one end of the sleeve extends into the connecting hole along the axial direction of the outer tube and abuts against the bottom of the connecting hole; the outer tube is inserted into the connecting hole, and the end face of the insertion end of the outer tube, the corresponding position of the outer side wall of the sleeve and the inner wall of the connecting hole together form a water containing cavity, the outer side walls of the three fixing sleeves corresponding to the opening position of the sleeve and the corresponding position of the inner wall of the outer tube together form a water outlet groove connected to the water containing cavity, the end face of the insertion end of the connecting sleeve, the end face of the corresponding end of the sleeve and the corresponding position of the inner side wall of the outer tube together form a cavity structure connected to the water outlet groove, one side of the cavity structure is also connected to the water through hole, and the water containing cavity, the water outlet groove and the cavity structure are connected to form a water outlet channel

[0006] By adopting the above structure, the saw blade is sleeved on the support rod assembly and connected to the reciprocating device. Therefore, the connection between the saw head and the reciprocating device will not be affected by the outside world. In addition, cooling water is injected from the set water inlet hole to cool the support rod assembly and the handle. After the cooling water passes through the support rod assembly through the water outlet channel, the cooling water is sprayed onto the working part of the saw blade, thereby reducing the temperature of the surgical site and effectively protecting important soft tissues such as the spinal cord and nerves. Under cooling conditions, the cutting and grinding efficiency of the saw blade is stable.

[0007] In order to simplify the structure and facilitate the installation of the connecting shaft, preferably, one end of the connecting shaft is connected and fixed to the saw handle, and the other end passes through the second fixed sleeve, the first fixed sleeve and the third fixed sleeve in sequence, and the protruding end of the connecting shaft is connected to the transmission device in the handle.

[0008] In order to simplify the transmission structure and facilitate disassembly and assembly, preferably, the transmission device includes an input eccentric shaft, a reciprocating frame and a connecting rod connected to the connecting shaft, a step through hole is provided in the handle, a first bearing is embedded in the step through hole, the input end of the input eccentric shaft passes through the first bearing, and the output end of the input eccentric shaft is provided with an eccentric shaft extending horizontally outward;

[0009] The reciprocating frame includes a connecting block, a groove cavity with a "U"-shaped cross-section is provided in the connecting block, a horizontally extending support rod is provided at the non-open end of the connecting block, and a socket is provided at the extending end of the support rod, a cavity structure is provided in the handle, a fixing pin is passed through one side of the handle, and the insertion end of the fixing pin extends into the socket; a vertically extending extension section is provided on one side of the outer wall of the socket, a connecting column is provided at the extending end of the extension section, a horizontal surface section is provided on one side of the outer wall of the connecting column, an open groove is provided at a position corresponding to the connecting column on the connecting rod, and a straight section is provided at a position of the groove wall of the open groove corresponding to the horizontal surface section, the connecting column is sleeved in the open groove, and the horizontal surface section and the straight section fit each other.

[0010] In order to facilitate installation and avoid movement interference, preferably, the "U"-shaped groove cavity on the connecting block includes an upper groove wall and a lower groove wall, and two inclined surface sections with higher outer sides and lower inner sides are symmetrically arranged at the two groove walls, and arc sections are arranged at the lower ends of the two inclined surface sections corresponding to the angles of the groove cavity, and transition arc sections connected to the "U"-shaped opening are arranged at the higher ends of the two inclined surface sections; a second bearing is vertically arranged in the "U"-shaped groove cavity of the connecting block, and the middle through hole of the second bearing is sleeved and fixed on the eccentric shaft.

[0011] In order to facilitate guiding the flow direction of cooling water and improve the cooling efficiency of the saw blade, it is preferred that a planar section is provided on the saw handle, the planar section is connected to the side wall of the saw blade, and a water hole is formed between the inner wall of the connecting sleeve and the planar section; the plane where the planar section is located is flush with the plane where the side wall of the corresponding end of the saw blade is located.

[0012] In order to prevent slipping and facilitate the input of cooling water, preferably, an anti-slip sleeve is provided on the handle, and a water inlet pipe connected to the water inlet hole is provided on the anti-slip sleeve.

[0013] Beneficial effects: The present invention uses a transmission device to drive the saw blade to reciprocate axially, and uses cooling water to cool the saw blade, thereby cutting bone tissue. It has a simple structure, convenient operation, simplified installation structure, reduced occupied space, high stability and good safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural explosion diagram of the present invention.

[0015] Figure 2 It is a schematic diagram of the installation structure of the present invention.

[0016] Figure 3 for Figure 2 Enlarged view of point A in .

[0017] Figure 4 for Figure 2 Enlarged view of point B in .

[0018] Figure 5 for Figure 2 Enlarged view of point C in the figure.

[0019] Figure 6 Schematic diagram of the structure of the saw blade.

[0020] Figure 7 It is a schematic diagram of the structure of the saw blade and the connecting sleeve.

[0021] Figure 8 It is a schematic diagram of the structure of the sleeve.

[0022] Fig. 9 Schematic diagram of the connecting rod structure.

[0023] Fig.10 A schematic diagram of the connection block structure.

[0024] Fig.11 This is the usage status diagram of the transmission device. DETAILED DESCRIPTION

[0025] The present invention will be further described below in conjunction with the accompanying drawings.

[0026] Depend on Figures 1 to 11As shown, the present invention includes a sawing and sharpening device and a support rod assembly, the sawing and sharpening device includes a saw blade 1, one end of the saw blade 1 is provided with a saw handle 11, a plane section 111 is provided on the saw handle 11, the plane section 111 is connected with the side wall of the saw blade 1, and the plane where the plane section 111 is located is flush with the plane where the side wall of the corresponding end of the saw blade 1 is located; the support rod assembly includes a connecting sleeve 21 sleeved on the outer tube 2, the saw handle 11 is inserted in the connecting sleeve 21, and a water hole 43 is formed between the corresponding position of the inner wall of the connecting sleeve 21 and the plane section 111, the insertion end of the saw handle 11 is connected to a connecting shaft 12, the connecting shaft 12 passes through the outer tube 2 and is connected to a handle 5 provided with a water inlet hole 50.

[0027] The support rod assembly also includes a sleeve 3 fixed in the outer tube 2, and an open groove is axially provided on one side of the sleeve 3. A first fixed sleeve 31 and a second fixed sleeve 32 are sequentially arranged in the sleeve 3 along the water outlet direction, and a third fixed sleeve 33 is sleeved in the first fixed sleeve 31. One end of the connecting shaft 12 is connected and fixed to the saw handle 11, and the other end is sequentially passed through the second fixed sleeve 32, the first fixed sleeve 31 and the third fixed sleeve 33. The protruding end of the connecting shaft 12 is connected to the transmission device in the handle 5.

[0028] A connecting hole 52 connected to the water inlet hole 50 is provided in the handle 5, and a fixing hole for sleeve-engaged with a third fixing sleeve 33 is provided at the bottom of the connecting hole 52. One end of the sleeve 3 extends into the connecting hole 52 along the axial direction of the outer tube 2 and abuts against the bottom of the connecting hole 52. The outer tube 2 is inserted into the connecting hole 52, and the end face of the insertion end of the outer tube 2, the corresponding position of the outer side wall of the sleeve 3 and the inner wall of the connecting hole 52 are combined to form a water containing cavity 41. The outer side walls of the three fixing sleeves corresponding to the opening positions of the sleeve 3 and the corresponding positions of the inner wall of the outer tube 2 are combined to form a water outlet groove 42 connected to the water containing cavity 41. The end face of the insertion end of the connecting sleeve 21, the end face of the corresponding end of the sleeve 3 and the corresponding position of the inner wall of the outer tube 2 are combined to form a cavity structure connected to the water outlet groove 42. One side of the cavity structure is also connected to the water through hole 43. The water containing cavity 41, the water outlet groove 42 and the cavity structure are connected to form a water outlet channel.

[0029] The transmission device includes an input eccentric shaft 53, a reciprocating frame and a connecting rod 56 connected to the connecting shaft 12. A stepped through hole is provided in the handle 5, and a first bearing 531 is embedded in the stepped through hole. The input end of the input eccentric shaft 53 passes through the first bearing 531, and the output end of the input eccentric shaft 53 is provided with an eccentric shaft 532 extending horizontally outward; the reciprocating frame includes a connecting block 533, and a groove cavity with a "U"-shaped cross-section is provided in the connecting block 533. A horizontally extending support rod 534 is provided at the non-open end of the connecting block 533, and a socket 541 is provided at the extended end of the support rod 534. 5 is provided with a cavity structure, a fixing pin 542 is penetrated on one side of the handle 5, and the insertion end of the fixing pin 542 extends into the insertion hole 541; a vertically extending extension section 543 is provided on one side of the outer wall of the insertion hole 541, a connecting column 544 is provided at the extending end of the extension section 543, a horizontal surface section is provided on one side of the outer wall of the connecting column 544, an opening groove 55 is provided at the position corresponding to the connecting column 544 on the connecting rod 56, a straight section is provided at the position of the groove wall of the opening groove 55 corresponding to the horizontal surface section, the connecting column 544 is sleeved in the opening groove 55, and the horizontal surface section and the straight section fit each other.

[0030] The "U"-shaped groove cavity on the connecting block 533 includes an upper groove wall and a lower groove wall. At the two groove walls, two inclined surface sections 61 with higher outer sides and lower inner sides are symmetrically arranged. Arc sections 62 are arranged at the lower ends of the two inclined surface sections 61 corresponding to the angle of the groove cavity. Transition arc sections 63 connected to the "U"-shaped opening are arranged at the higher ends of the two inclined surface sections 61. A second bearing 521 is vertically arranged in the "U"-shaped groove cavity of the connecting block 533. The middle through hole of the second bearing 521 is sleeved and fixed on the eccentric shaft 532.

[0031] An anti-slip cover 50 is sleeved on the handle 5 , and a water inlet pipe 501 communicating with the water inlet hole 51 is provided on the anti-slip cover 50 .

[0032] The method of use of the present invention is as follows:

[0033] like Figures 1 to 10 As shown, the connecting sleeve 21 is sleeved on the saw handle 11, and a sleeve 3 with an opening on one side is fixed in the outer tube 2, and a first fixing sleeve 31 and a second fixing sleeve 32 are sequentially arranged in the sleeve 3 along the water outlet direction, and a third fixing sleeve 33 is sleeved in the first fixing sleeve 31. One end of the connecting shaft 12 is connected and fixed to the saw handle 11, and the other end is sequentially passed through the second fixing sleeve 32, the first fixing sleeve 31 and the third fixing sleeve 33. The protruding end of the connecting shaft 12 is connected to the connecting rod 51, and the connecting rod 56 is connected to the connecting block 533. Therefore, the connection between the saw blade 1 and the connecting block 533 will not be affected by the outside world.

[0034] Among them, the outer tube 2 is inserted into the connecting hole 52, and the end face of the insertion end of the outer tube 2 and the inner wall of the connecting hole 52 are combined to form a water containing chamber 41, and the outer walls of the three fixed sleeves correspond to the opening positions of the sleeve 3 and the corresponding positions of the inner wall of the outer tube 2 to form a water outlet groove 42 connected to the water containing chamber 41. The end face of the insertion end of the connecting sleeve 21, the end face of the corresponding end of the sleeve 3 and the corresponding positions of the inner wall of the outer tube 2 are combined to form a cavity structure connected to the water outlet groove 42, and one side of the cavity structure is also connected to the water through hole 43, and the water containing chamber 41, the water outlet groove 42 and the cavity structure are connected to form a water outlet channel.

[0035] At the same time, a stepped through hole is provided in the handle 5, in which a first bearing 51 is embedded. The input end of the input eccentric shaft 31 passes through the first bearing 511, and the output end of the input eccentric shaft 51 is provided with an eccentric shaft 532 extending horizontally outward, on which a second bearing 521 is sleeved and fixed, and the second bearing 521 is vertically arranged in the "U"-shaped groove cavity of the connecting block 531.

[0036] When in use, the input eccentric shaft 53 is driven to rotate by a motor (not shown), and the eccentric shaft 532 at the output end of the input eccentric shaft 53 synchronously rotates eccentrically relative to the input eccentric shaft 53. During this process, the eccentric shaft 532 is displaced in the vertical direction. Since the second bearing 521 is arranged in the "U"-shaped groove cavity of the connecting block 533, the eccentric shaft 532 reciprocates in the vertical direction, and the reciprocating frame is driven by the second bearing 521 to reciprocate in the vertical direction.

[0037] During the reciprocating movement of the reciprocating frame in the vertical direction, the position of the socket 541 is penetrated and fixed on the handle 5 by the fixing pin 542, and the reciprocating frame and the extension section 543 are flipped back and forth in the clockwise and counterclockwise directions with the socket 541 as the center. At the same time, the connecting column 544 arranged on the extension section 543 is sleeved in the opening groove 55. Since the horizontal section and the straight section fit each other, relative rotation between the connecting column and the opening groove can be prevented, which is more conducive to transmission. Therefore, when the connecting column 544 is flipped back and forth by the extension section 543, the connecting rod 56 is driven to pull the connecting shaft 12 to do reciprocating movement, that is, the saw handle 11 is pulled to do reciprocating movement. Since the saw handle 11 is placed in the outer tube 2, the saw head 1 is driven to do reciprocating movement along the axial direction of the outer tube 2 (such as Fig.11 As shown in Figures a and b in the figure), such reciprocating movement, when the bone saw is held vertically or obliquely, the bone tissue position processed by the saw blade 1 is evenly stressed, the saw cut wound surface is neat and stable, the treatment effect of bone tissue grinding or repair can be improved, the wound recovers faster, and the saw cut depth and width can be well controlled.

[0038] At the same time, Figures 9 to 11As shown in the figure, the displacement of the eccentric shaft 532 in the vertical direction causes the angle between the eccentric shaft 532 and the connecting block 531 to change. In order to avoid movement interference, the second bearing 521 is sleeved on the eccentric shaft 532, and the second bearing 521 is vertically set in the "U"-shaped groove of the connecting block 531; however, during the turning process of the connecting block 531, the inclination angle between the upper and lower inner groove walls of the "U"-shaped groove and the horizontal direction will also change, while the wheel surface of the second bearing 521 is straight. During the movement in the vertical direction, the wheel surface is not tilted. In order to make the wheel surface of the second bearing 521 and the horizontal direction change, the wheel surface of the second bearing 521 is flat. The inner groove wall of the "U"-shaped groove with a changing inclination angle will not interfere with each other during the transmission process. Two inclined surface sections 61 with a high outer side and a low inner side are symmetrically arranged at the upper and lower inner groove walls. The inclination of the inclined surface section 61 is 5~20°, preferably 15°; in order to fully avoid interference, arc sections 62 are arranged at the angles of the groove cavities corresponding to the lower ends of the two inclined surface sections 61; in order to reduce the resistance of surface contact during movement, avoid transmission clearance, reduce vibration caused by movement, and improve transmission quality, transition arc sections 63 connected to the "U"-shaped opening are arranged at the higher ends of the two inclined surface sections 61.

[0039] In addition, if Figure 1 , Figures 3 to 5 as well as Figure 7 As shown, cooling water is input from the water inlet pipe 501, and the cooling water flows into the water containing chamber 41 through the water inlet hole 51, and flows into the cavity structure position in the outer tube 2 through the water outlet groove 42. Two plane sections 111 are symmetrically provided on the saw handle 11. The two plane sections 111 and the corresponding ends of the inner wall of the connecting sleeve 21 form two water holes 43. The cooling water is then sprayed onto the two side walls of the saw blade 1 through the two water holes 43. Meanwhile, at the opening groove position of the sleeve 3, the cooling water will cool and dissipate heat for the connecting shaft 12, the first fixed sleeve 31, the second fixed sleeve 32 and the third fixed sleeve 33, thereby effectively cooling the saw blade 1 at multiple points, while reducing the heat transfer between the outer tube 2 and the handle 5, thereby extending the service life.

[0040] It should be noted that if Figure 5 As shown, the outer tube 2 is inserted into the connecting hole 52, and the water containing cavity 41 formed between the insertion end of the outer tube 2 and the connecting hole 52 forms a closed space in the outflow direction. The cooling water can only flow out along the water outlet 42 without overflowing, so as to ensure the stability of the use of the cooling water.

Claims

1. A water-cooled bone saw, characterized in that: The invention comprises a saw grinding device and a support rod assembly, wherein the saw grinding device comprises a saw blade (1), one end of the saw blade (1) is provided with a saw handle (11), the support rod assembly comprises a connecting sleeve (21) sleeved on an outer tube (2), the saw handle (11) is inserted into the connecting sleeve (21), a water hole (43) is formed between the inner wall of the connecting sleeve (21) and the saw handle (11), the insertion end of the saw handle (11) is connected to a connecting shaft (12), and the connecting shaft (12) is inserted into the outer tube (2). The support rod assembly further comprises a sleeve (3) fixedly arranged in the outer tube (2), an open groove being axially arranged on one side of the sleeve (3), a first fixing sleeve (31) and a second fixing sleeve (32) being arranged in sequence in the sleeve (3) along the water outlet direction, a third fixing sleeve (33) being sleeved on the first fixing sleeve (31), and a connecting hole (33) being arranged in the handle (5) and communicating with the water inlet hole (51). 52), a fixing hole for a third fixing sleeve (33) is provided at the bottom of the connecting hole (52), one end of the sleeve (3) extends into the connecting hole (52) along the axial direction of the outer tube (2) and abuts against the bottom of the connecting hole (52); the outer tube (2) is inserted into the connecting hole (52), and the end surface of the insertion end of the outer tube (2), the corresponding position of the outer wall of the sleeve (3) and the inner wall of the connecting hole (52) are surrounded to form a water containing cavity (41), and the outer walls of the three fixing sleeves are connected to the outer wall of the connecting hole (52). The opening position of the corresponding sleeve (3) and the corresponding position of the inner wall of the outer tube (2) are surrounded to form a water outlet groove (42) connected to the water containing cavity (41); the end surface of the insertion end of the connecting sleeve (21), the end surface of the corresponding end of the sleeve (3) and the corresponding position of the inner wall of the outer tube (2) are surrounded to form a cavity structure connected to the water outlet groove (42); one side of the cavity structure is also connected to the water through hole (43); the water containing cavity (41), the water outlet groove (42) and the cavity structure are connected to form a water outlet channel.

2. The water-cooled bone saw according to claim 1, characterized in that: One end of the connecting shaft (12) is connected and fixed to the saw handle (11), and the other end passes through the second fixing sleeve (32), the first fixing sleeve (31) and the third fixing sleeve (33) in sequence. The end of the connecting shaft (12) passing through is connected to a transmission device in the handle (5).

3. The water-cooled bone saw according to claim 2, characterized in that: The transmission device comprises an input eccentric shaft (53), a reciprocating frame and a connecting rod (56) connected to the connecting shaft (12); a stepped through hole is provided in the handle (5), a first bearing (531) is embedded in the stepped through hole, an input end of the input eccentric shaft (53) passes through the first bearing (531), and an output end of the input eccentric shaft (53) is provided with an eccentric shaft (532) extending horizontally outward; The reciprocating frame comprises a connecting block (533), wherein a groove cavity with a "U"-shaped cross section is provided in the connecting block (533), a horizontally extending support rod (534) is provided at a non-open end of the connecting block (533), and a plug hole (541) is provided at the extended end of the support rod (534), and a cavity structure is provided in the handle (5), and a fixing pin (542) is penetrated on one side of the handle (5), and the insertion end of the fixing pin (542) extends into the plug hole (541); A vertically extending extension section (543) is provided on one side of the wall, a connecting column (544) is provided at the extending end of the extension section (543), a horizontal surface section is provided on one side of the outer wall of the connecting column (544), an open groove (55) is provided at a position corresponding to the connecting column (544) on the connecting rod (56), a straight section is provided at a position of the groove wall of the open groove (55) corresponding to the horizontal surface section, the connecting column (544) is sleeved in the open groove (55), and the horizontal surface section and the straight section fit each other.

4. The water-cooled bone saw according to claim 3, characterized in that: The "U"-shaped groove cavity on the connecting block (533) comprises an upper groove wall and a lower groove wall. Two inclined surface sections (61) with a higher outer side and a lower inner side are symmetrically arranged on the two groove walls. An arc section (62) is arranged at the lower ends of the two inclined surface sections (61) corresponding to the angle of the groove cavity. A transition arc section (63) communicating with the "U"-shaped opening is arranged at the upper ends of the two inclined surface sections (61). A second bearing (521) is vertically arranged in the "U"-shaped groove cavity of the connecting block (533). The middle through hole of the second bearing (521) is sleeved and fixed on the eccentric shaft (532).

5. The water-cooled bone saw according to claim 1, characterized in that: A plane section (111) is provided on the saw handle (11), the plane section (111) penetrates the side wall of the saw blade (1), and the inner wall of the connecting sleeve (21) and the plane section (111) together form a water hole (43); the plane where the plane section (111) is located is flush with the plane where the side wall of the corresponding end of the saw blade (1) is located.

6. The water-cooled bone saw according to claim 1, characterized in that: An anti-slip sleeve (50) is sleeved on the handle (5), and a water inlet pipe (501) connected to the water inlet hole (51) is provided on the anti-slip sleeve (50).

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