CN217118514U - Round depth-limiting electric bone saw for acetabulum - Google Patents
Round depth-limiting electric bone saw for acetabulum Download PDFInfo
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- CN217118514U CN217118514U CN202122716647.2U CN202122716647U CN217118514U CN 217118514 U CN217118514 U CN 217118514U CN 202122716647 U CN202122716647 U CN 202122716647U CN 217118514 U CN217118514 U CN 217118514U
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Abstract
The utility model discloses an acetabulum circular depth-limiting electric bone saw, which comprises a chain saw structure, a driving mechanism, a saw sleeve and a saw frame; the chain saw structure comprises a chain, a driving chain wheel and a driven chain wheel; the saw frame is in a strip shape, and a handle vertical to the length direction of the saw frame is arranged at the bottom of the saw frame; the driven chain wheel and the driving chain wheel are sequentially and rotatably arranged along the length direction of the saw frame, and the rotating shaft is vertical to the length direction of the saw frame; the chain is sleeved outside the driving chain wheel and the driven chain wheel and meshed with the driving chain wheel and the driven chain wheel; the part where the chain is meshed to the driven chain wheel is emptied; the driving mechanism is used for driving the driving chain wheel to rotate; the saw sleeve can be movably sleeved at the saw frame along the length direction of the saw frame; one end of the saw sleeve close to the driven chain wheel is a sleeve saw end, and the driven chain wheel can be sleeved in the sleeve saw end; the saw sleeve is used for limiting the cutting depth of the chain saw structure; a limiting structure for limiting the movement of the saw sleeve is arranged between the saw sleeve and the saw frame. The utility model has the advantages of can be accurate, sharp fall, high-efficient, excise osteophyte steadily.
Description
Technical Field
The utility model relates to the field of surgical instruments, especially, relate to an electronic bone saw of circular limit for depth of acetabular bone.
Background
Artificial Total hip replacement (THA) is one of the most effective treatment methods for treating hip joint diseases (hip fracture, DDH, femoral head necrosis, degenerative coxitis and the like) at present, and has far-reaching significance for relieving pain of patients, improving hip joint mobility, recovering joint function and improving life quality of patients. In China, the artificial total hip replacement starts in the 60 th of the 20 th century, and the technology is popularized nationwide at the end of the 90 th. In recent years, artificial total hip replacement techniques have become more mature. For the treatment of the artificial total hip joint replacement surgery for patients with primary or secondary hip osteoarthritis, the surgery technology is mature, the curative effect is obvious, and the treatment method is the best treatment mode at present.
The anatomy of the acetabulum is similar to a hemisphere, osteophytes grow on the edge and are irregularly shaped, and in clinical manual total hip arthroplasty, the treatment of the osteophytes on the edge of the acetabulum is basically performed by manually applying an osteotome and a hammer or using an electric square oscillating saw to chisel, cut and trim redundant osteophytes.
If the electric square oscillating saw is used, normal soft tissues around the acetabulum can be damaged due to the fact that the oscillating saw oscillates left and right, particularly, important nerves (sciatic nerves) exist behind the acetabulum, femoral nerves and femoral arteriovenous are in the front of the acetabulum, the damage risk is high, and once the damage is disastrous; the swing saw is easy to float up and down, and has the defects of insufficient bone cutting or excessive bone resection and poor accuracy.
If a osteotome and a hammer are used for chiseling bones manually, the operation is difficult due to the sclerotin hardening, the osteotome is forcefully forced to break the sclerotin, the iatrogenic fracture is caused, the osteopenia is too much due to the osteoporosis, and the accuracy is poor; because of being limited in the osteotome and being flat or curved simpler design, unable accurate chisel removes osteophyte, and chisels the edge irregular, needs the operation of longer time, extension operation time to increase the whole risk of operation and anesthesia.
In addition, whether manual or electric swing sawing is used to cut the bone, over-range operation may occur, damaging adjacent vital nerve and vascular tissues, resulting in serious complications.
SUMMERY OF THE UTILITY MODEL
Therefore, the circular depth-limiting electric bone saw for the acetabulum needs to be provided to solve the problems that peripheral normal tissues are easily damaged, insufficient, excessive or irregular excision is easy, the accuracy is poor and the efficiency is low in the acetabulum edge osteophyte treatment mode in the prior art.
In order to achieve the aim, the inventor provides an acetabulum circular depth-limiting electric bone saw, which comprises a chain saw structure, a driving mechanism, a saw sleeve and a saw frame; the chain saw structure comprises a chain, a driving chain wheel and a driven chain wheel;
the saw frame is in a long strip shape, a handle perpendicular to the length direction of the saw frame is arranged at the bottom of the saw frame, and the handle is provided with a control key for controlling the driving mechanism;
the driven chain wheel and the driving chain wheel are sequentially arranged along the length direction of the saw frame, the driving chain wheel and the driven chain saw can rotate, and a rotating shaft of the driving chain wheel and a rotating shaft of the driven chain saw are perpendicular to the length direction of the saw frame; the chain is connected end to end in an annular shape, is tightly sleeved outside the driving chain wheel and the driven chain wheel and is meshed with the driving chain wheel and the driven chain wheel; the part where the chain is meshed to the driven chain wheel is emptied;
the driving mechanism is in transmission connection with the driving chain wheel and is used for driving the driving chain wheel to rotate;
the saw sleeve is sleeved at the saw frame and can move along the length direction of the saw frame; one end of the saw sleeve close to the driven chain wheel is a sleeve saw end, and the driven chain wheel can be sleeved in the sleeve saw end; the saw sleeve can be moved according to requirements until the saw end of the saw sleeve covers the corresponding position of the driven chain wheel, so that the cutting depth of the chain saw structure is limited; be equipped with limit structure between saw cover and the sash, limit structure is used for after removing the saw cover according to the demand, the restriction saw cover removes.
As a preferred structure of the present invention, the rotation axis of the driving sprocket and the rotation axis of the driven chain saw are perpendicular to the length direction of the saw frame and parallel to the handle.
As a preferred structure of the utility model, the limiting structure comprises a rack, a screw and a shifting wheel; the saw sleeve is provided with a position-giving opening; the rack is arranged at the saw frame and is parallel to the length direction of the saw frame; the screw rod is axially and rotatably arranged in the saw sleeve, is parallel to the length direction of the saw frame and is meshed with the rack; the poking wheel is fixedly sleeved at the screw and penetrates through the position-giving opening.
As a preferred structure of the utility model, the head end of the saw frame is provided with two mounting plates which are in a long strip shape, the two mounting plates are arranged oppositely, and the length directions of the two mounting plates are consistent with the length direction of the saw frame; a gap is reserved between the two mounting plates, the driven chain wheel and the driving chain wheel are arranged between the gaps, and the part of the chain meshed to the driven chain wheel is positioned outside the gap; the saw sleeve is sleeved on the mounting plate.
As a preferred structure of the utility model, actuating mechanism includes the rotating electrical machines, the output shaft of rotating electrical machines is connected with drive sprocket's rotation axis transmission to it is rotatory to drive sprocket.
As a preferred structure of the utility model, the driving mechanism further comprises a worm wheel and a worm; the worm is coaxially connected with an output shaft of the rotating motor, the rotating motor is arranged at the tail end of the saw frame, and the worm is arranged along the length direction of the saw frame; the worm wheel is sleeved on the rotating shaft of the driving chain wheel and meshed with the spiral teeth of the worm.
As a preferred structure of the present invention, the driving mechanism further includes a first bevel gear and a second bevel gear; the first bevel gear is sleeved at the output shaft of the rotating motor, the rotating motor is arranged at the tail end of the saw frame, and the output shaft of the rotating motor is arranged along the length direction of the saw frame; the second bevel gear is sleeved at the rotating shaft of the driving chain wheel and meshed with the first bevel gear.
As a preferred structure of the utility model, actuating mechanism still includes the derailleur, the input shaft of derailleur is connected with the output shaft transmission of rotating electrical machines, the output shaft of derailleur is connected with drive sprocket's rotation axis transmission.
As a preferred structure of the present invention, the transmission is a planetary sprocket transmission.
Compared with the prior art, the acetabulum circular depth limiting electric bone saw adopts an electric chain saw structure as a direct execution component for cutting, is relatively sharp, can cut bones easily, drives a chain to move by means of the rotation of a driving chain wheel to realize cutting, has controllable rotating speed, stable use process, circular arc-shaped cutting surface and regular chiseling edges; through setting up mobilizable saw cover, realize the oversleeve depth limiting design of chain saw structure, and the size selection of different diameters, can be according to the thickness of waiting to cut off osteophyte, freely adjust the size that the chain stretches out the saw cover, avoid cutting the bone too deeply or the bone is cut to the super scope. Therefore, the method can achieve accurate excision of osteophytes around the acetabulum, reduce or avoid complications generated during osteotomy, shorten the excision time of the osteophytes by 3-10min, shorten the time of artificial hip joint replacement operation by about 10%, shorten the operation time, improve the efficiency, and reduce the overall risks of operation and anesthesia, thereby increasing the curative effect and promoting the rapid rehabilitation of patients.
Drawings
Fig. 1 is a structural view of an acetabular circular depth-limiting electric bone saw according to an embodiment of the present invention;
fig. 2 is a cross-sectional view of the acetabular circular depth-limiting electric bone saw according to an embodiment of the present invention;
fig. 3 is a sectional view of a chain saw structure according to an embodiment of the present invention;
fig. 4 is a structural view of a chain saw structure according to an embodiment of the present invention;
fig. 5 is a cross-sectional view of a position limiting structure according to an embodiment of the present invention;
fig. 6 is a structural view of a drive mechanism according to an embodiment of the present invention.
Description of reference numerals:
1. a chain;
2. a drive sprocket; 200. a rotating shaft;
3. a driven sprocket;
4. a saw frame;
5. a saw sleeve; 500. sleeving a saw end; 501. a let position port;
6. a handle; 600. a control key;
7. a rack;
8. a screw;
9. a thumb wheel;
10. mounting a plate;
11. a rotating electric machine; 1100. an output shaft of the rotating electrical machine;
12. a first bevel gear;
13. a second bevel gear;
14. a transmission; 1400. an input shaft of the transmission; 1401. an output shaft of the transmission.
Detailed Description
To explain technical contents, structural features, and objects and effects of the technical solutions in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.
The utility model provides an electronic bone saw of dark limit of circular limit of acetabular bone mainly is applied to the processing to osteophyte around the acetabular bone in the artifical total hip joint replacement operation, also can be used to autologous ilium get the processing that bone and relevant cut bone etc. especially can accomplish to reach accurate excision to osteophyte around the acetabular bone, reduces or avoids the complication that produces when cutting the bone, in addition, has shortened the time that osteophyte amputated.
Referring to fig. 1 and 2, in an embodiment, the acetabular circular depth-limiting electric bone saw includes a chain saw structure, a driving mechanism, a saw sleeve 5 and a saw frame 4; the chain saw structure is a direct execution part for cutting osteophytes around the acetabulum, the cutting surface actually participating in cutting is arc-shaped, and the chain saw structure with the corresponding size can be selected to be assembled at the round depth-limiting electric bone saw of the acetabulum according to actual requirements; the saw frame 4 is used for placing a chain saw structure and is a support of the chain saw structure, and the acetabulum is a hemispherical deep socket, so that the saw frame 4 is arranged in a strip shape to ensure that the part of the chain saw structure actually participating in cutting can extend into the acetabulum; the saw sleeve 5 is used for adjusting the depth of the cut bone of the chain saw structure, and particularly, the position of the saw sleeve 5 is adjusted according to the thickness of osteophytes, namely the number of the overlapped parts of the saw sleeve 5 and the chain saw structure is adjusted; the drive mechanism provides a source of power for the chain saw structure for driving the chain saw structure to operate to cut the osteophytes.
The bottom of the saw frame 4 is provided with a handle 6 perpendicular to the length direction of the saw frame 4, the handle 6 is used for being grasped by a user to operate the whole acetabulum circular depth-limiting electric bone saw, including moving the acetabulum circular depth-limiting electric bone saw, and further including starting or stopping the driving mechanism, therefore, in a further embodiment, the handle 6 is provided with a control key 600 for operating the driving mechanism.
Referring to fig. 3 and 4, the chain saw structure includes a chain 1, a driving sprocket 2 and a driven sprocket 3, wherein the driving sprocket 2 and the driven sprocket 3 cooperate with each other to drive the chain 1 to perform a cutting operation, wherein the driving sprocket 2 is mainly responsible for transferring kinetic energy while supporting the chain 1, and the driven sprocket 3 is mainly responsible for supporting the chain 1 to ensure that the chain 1 can wind along a predetermined track. The driven chain wheel 3 and the driving chain wheel 2 are sequentially arranged along the length direction of the saw frame 4, wherein the driving chain wheel 2 is closer to the handle 6 than the driven chain wheel 3, the driving chain wheel 2 and the driven chain saw can both rotate, and the rotating shaft 200 of the driving chain wheel 2 and the rotating shaft 200 of the driven chain saw are both vertical to the length direction of the saw frame 4; the chain 1 is connected end to end in an annular shape, is tightly sleeved outside the driving chain wheel 2 and the driven chain wheel 3 and is meshed with the driving chain wheel 2 and the driven chain wheel 3, and the arrangement enables the chain 1 to be driven by the driving chain wheel 2 and the driven chain wheel 3 together so as to wind the driving chain wheel 2 and the driven chain wheel 3 to perform winding motion, thereby realizing the cutting function. The part of the chain 1 that engages the driven sprocket 3 is emptied, the arrangement being such that the part of the chain 1 that is in this position actually participates in the cutting.
The rotating shaft 200 of the driving sprocket 2 is a shaft which is perpendicular to the driving sprocket 2 and penetrates through the center of the driving sprocket 2, the rotating shaft 200 of the driven sprocket 3 is a shaft which is perpendicular to the driven sprocket 3 and penetrates through the center of the driven sprocket 3, the arrangement enables the cutting direction of the chain saw structure to be consistent with the length direction of the saw frame 4, namely the acetabulum circular depth-limiting electric bone saw is controlled to advance along the length direction of the saw frame 4 to be cut, and the length from the position of the driven sprocket 3 farthest away from the driving sprocket 2 to the position of the saw frame 4 connected with the handle 6 is the length of the chain saw structure which can extend into the acetabulum.
In a further embodiment, the rotation axis 200 of the driving sprocket 2 and the rotation axis 200 of the driven chain saw are perpendicular to the length direction of the saw frame 4 and parallel to the handle 6. That is, when the longitudinal direction of the saw frame 4 is taken as the X direction of the three-dimensional coordinates, the handle 6 is disposed in the-Y direction, and the rotation axis 200 of the driving sprocket 2 and the rotation axis 200 of the driven chain saw are both oriented in the + Y direction. When cutting osteophyte, the cutting saw needs to extend into acetabulum and inwardly cut osteophyte, when a user holds the handle 6, the length direction of the saw frame 4 is the direction extending into the acetabulum, at the moment, in order to cut osteophyte, the cutting direction of the chain saw structure is consistent with the direction extending into the acetabulum of the saw frame 4, and the cutting saw is more handy and easy to operate, so that the rotating shaft 200 of the driving chain wheel 2 and the rotating shaft 200 of the driven chain saw are arranged in such a way to be more in line with human mechanics, and more in line with the habitual direction of cutting osteophyte.
The saw sleeve 5 is sleeved at the saw frame 4 and can move along the length direction of the saw frame 4, specifically, the saw sleeve 5 is tubular, if the saw frame 4 is a long and strip-shaped plate, the tube cavity of the saw sleeve 5 is a flat and long strip-shaped tube, and the cross-sectional dimension of the tube cavity is larger than the cross-sectional width of the saw frame 4, so that after the saw sleeve 5 is sleeved at the saw frame 4, the saw sleeve 5 can move along the length direction of the saw frame 4, one end of the saw sleeve 5, which is close to the driven sprocket 3, is a sleeve saw end 500, the driven sprocket 3 can be sleeved in the sleeve saw end 500, that is, the sleeve saw end 500 of the saw sleeve 5 is sleeved on the saw frame 4, and the driven sprocket 3 can be sleeved together, the maximum cutting depth of the circular saw can be achieved when the sleeve 5 end sleeved on the driven sprocket 3 is farthest from the position of the driven sprocket 3 to the position of the driven sprocket 3, and the position of the saw sleeve 500 can be adjusted to where the driven sprocket 3 covers, thereby adjusting the maximum depth of cutting of the chainsaw structure.
In order to install the chain saw structure more stably, please refer to fig. 1 and 3, the head end of the saw frame 4 is provided with two mounting plates 10, the mounting plates 10 are long, the length of the mounting plates 10 is not less than the length required for installing the chain saw structure, and the width of the mounting plates 10 is not less than the maximum diameter of the driving sprocket 2 and the driven sprocket 3. The two mounting plates 10 are arranged oppositely, and the length directions of the two mounting plates 10 are consistent with the length direction of the saw frame 4; leave the space between two mounting panels 10, passive sprocket 3, drive sprocket 2 locate between the space, and the part that 1 meshing of chain was located 3 departments to passive sprocket is outside the space, if two mounting panels 10 keep away from the one end of sash 4, set to the semicircle with 3 looks adaptations of passive sprocket, the one end that sash 4 was kept away from to two mounting panels 10 just coincides with passive sprocket 3. The saw sleeve 5 is sleeved on the mounting plate 10.
One end of the rotating shaft 200 of the driven sprocket 3 is rotatably connected with one mounting plate 10, and the other end of the rotating shaft 200 of the driven sprocket 3 is rotatably connected with the other mounting plate 10; one end of a rotating shaft 200 of the driving sprocket 2 is fixedly connected with the driven sprocket 3, and the other end of the rotating shaft 200 of the driving sprocket 2 sequentially penetrates through the mounting plate 10 and the chain saw and is in transmission connection with the driving mechanism.
The driving mechanism is in transmission connection with the driving sprocket 2, and specifically, the driving mechanism is in transmission connection with the rotating shaft 200 of the driving sprocket 2.
Adopt electronic chain saw structure as the direct executive component of cutting, sharper can fall to the ground to cut the bone by the profit, relies on 2 rotatory drive chains of drive sprocket 1 motions in order to realize the cutting, and the rotational speed is controllable, and the use is steady, and the cutting is personally submitted arc, chisels off the edge regular.
In actual use, the saw sleeve 5 can be moved according to requirements (the requirements are the thickness of the osteophyte to be cut off), the saw end 500 of the sleeve covers the corresponding position of the driven chain wheel 3, so as to limit the cutting depth of the chain saw structure, the depth limiting design of the sleeve of the chain saw structure is realized by arranging the movable saw sleeve 5, the size selection of different diameters is realized, the size of the driven chain wheel 3 extending out of the saw sleeve 5 can be freely adjusted according to the thickness of the osteophyte to be cut off, and the condition that the bone is cut deeply or beyond the range is avoided.
A limiting structure is arranged between the saw sleeve 5 and the saw frame 4 (when the mounting plate 10 is arranged, the limiting structure is arranged between the saw sleeve 5 and the mounting plate 10), the limiting structure is used for limiting the saw sleeve 5 to move after the saw sleeve 5 is moved according to requirements, namely, the movement of the saw sleeve 5 can be limited after the maximum cutting depth of the chain saw structure is adjusted, when the osteophyte is cut, the saw sleeve 5 is extruded after the chain saw structure is cut to the maximum cutting depth, but the saw sleeve 5 can be fixed, so that the chain saw structure is limited from continuously cutting the osteophyte downwards.
In conclusion, the round depth-limiting electric acetabular bone saw can accurately cut osteophytes around acetabulum, and reduce or avoid complications generated during bone cutting, in addition, the time for cutting osteophytes is shortened by 3-10min, the time for artificial hip joint replacement operation is shortened by about 10%, the operation time is shortened, the efficiency is improved, and the overall risks of operation and anesthesia are reduced, so that the curative effect is improved, and the rapid recovery of patients is promoted.
In order to limit the movement of the saw sheath 5, please refer to fig. 1, fig. 3, and fig. 5, in a certain embodiment, the limiting structure includes a rack 7, a screw 8, and a thumb wheel 9, wherein the screw 8 may have an external thread on the entire sidewall or only on a portion of the sidewall. The saw sleeve 5 is provided with a position-giving opening 501 for the thumb wheel 9 to extend out, so that a user can touch the thumb wheel 9 to rotate the thumb wheel 9; the rack 7 is arranged at the saw frame 4 (when the mounting plate 10 is arranged, the rack 7 is arranged at the mounting plate 10), and the length direction of the rack 7 is parallel to the length direction of the saw frame 4; the screw 8 is axially and rotatably arranged in the saw sleeve 5, specifically, the screw 8 is provided with a bearing in series, the bearing is connected to the saw sleeve 5, and the screw 8 is arranged in parallel with the length direction of the saw frame 4 and meshed with the rack 7; the dial wheel 9 is fixedly sleeved at the screw 8 and passes through the position-giving opening 501.
When the thumb wheel 9 is not rotated, the threads of the screw 8 and the rack 7 are mutually clamped, so that the movement of the saw sleeve 5 can be limited, when the position of the saw sleeve 5 needs to be adjusted, the thumb wheel 9 can be rotated, if the thumb wheel 9 is rotated in the forward direction, the screw 8 can move along the rack 7 in the direction close to the driven sprocket 3 while rotating, and the saw sleeve 5 can move in the direction close to the driven sprocket 3 along with the rotation of the thumb wheel 9; when the thumb wheel 9 is rotated reversely, the screw 8 moves along the rack 7 in the direction away from the driven sprocket 3, and the saw sleeve 5 moves in the direction away from the driven sprocket 3.
In order to drive the driving sprocket 2 to rotate, in one embodiment, the driving mechanism includes a rotating motor 11, an output shaft 1100 of which is drivingly connected to the rotating shaft 200 of the driving sprocket 2 to drive the driving sprocket 2 to rotate.
There are various ways for the transmission connection between the rotating shaft 200 and the output shaft 1100 of the rotating electrical machine, and in a certain embodiment, the driving mechanism may further include a worm wheel and a worm; the worm is coaxially connected with an output shaft 1100 of the rotating motor, specifically, the worm can be connected through a coupler, the rotating motor 11 is arranged at the tail end of the saw frame 4, the worm is arranged along the length direction of the saw frame 4, the saw frame 4 can be provided with a channel for the worm and the output shaft 1100 of the rotating motor to pass through, and the worm passes through the channel; the worm wheel is sleeved on the rotating shaft 200 of the driving chain wheel 2 and meshed with the spiral teeth of the worm, specifically, the saw frame 4 is provided with a yielding groove for placing the rotating shaft 200 and the worm wheel, the channel penetrates through the yielding groove, and the spiral teeth of the worm penetrate through the channel to the yielding groove.
Referring to fig. 2 and 6, in another embodiment, the driving mechanism may further include a first bevel gear 12 and a second bevel gear 13; the first bevel gear 12 is sleeved at an output shaft 1100 of the rotating motor, the rotating motor 11 is arranged at the tail end of the saw frame 4, and the output shaft 1100 of the rotating motor is arranged along the length direction of the saw frame 4; the second bevel gear 13 is sleeved on the rotating shaft 200 of the driving sprocket 2 and meshed with the first bevel gear 12. Similarly, the saw frame 4 may be provided with a passage through which the output shaft 1100 of the rotating motor passes, and the output shaft 1100 of the rotating motor passes through the passage; the sawhorse 4 is provided with a yielding groove for placing the first bevel gear 12 and the second bevel gear 13, the channel penetrates through the yielding groove, and the first bevel gear 12 is located in the yielding groove.
In addition, the rotating motor 11 is disposed at the tail end of the saw frame 4, and a housing is disposed to enclose the rotating motor 11.
In order to regulate the rotational speed of the drive sprocket 2, in a further embodiment the drive mechanism further comprises a transmission 14, in particular the transmission 14 may be a planetary transmission. The input shaft 1400 of the transmission is in driving connection with the output shaft 1100 of the rotating electrical machine, and the output shaft 1401 of the transmission is in driving connection with the rotating shaft 200 of the driving sprocket 2.
It should be noted that, although the above embodiments have been described herein, the scope of the present invention is not limited thereby. Therefore, based on the innovative concept of the present invention, the changes and modifications of the embodiments described herein, or the equivalent structure or equivalent process changes made by the contents of the specification and the drawings of the present invention, directly or indirectly apply the above technical solutions to other related technical fields, all included in the scope of the present invention.
Claims (9)
1. An acetabulum circular depth limiting electric bone saw is characterized by comprising a chain saw structure, a driving mechanism, a saw sleeve and a saw frame; the chain saw structure comprises a chain, a driving chain wheel and a driven chain wheel;
the saw frame is in a long strip shape, a handle perpendicular to the length direction of the saw frame is arranged at the bottom of the saw frame, and the handle is provided with a control key for controlling the driving mechanism;
the driven chain wheel and the driving chain wheel are sequentially arranged along the length direction of the saw frame, the driving chain wheel and the driven chain saw can rotate, and a rotating shaft of the driving chain wheel and a rotating shaft of the driven chain saw are perpendicular to the length direction of the saw frame; the chain is connected end to end in an annular shape, is tightly sleeved outside the driving chain wheel and the driven chain wheel and is meshed with the driving chain wheel and the driven chain wheel; the part where the chain is meshed to the driven chain wheel is emptied;
the driving mechanism is in transmission connection with the driving chain wheel and is used for driving the driving chain wheel to rotate;
the saw sleeve is sleeved at the saw frame and can move along the length direction of the saw frame; one end of the saw sleeve close to the driven chain wheel is a sleeve saw end, and the driven chain wheel can be sleeved in the sleeve saw end; the saw sleeve can be moved according to requirements until the saw end of the sleeve covers the corresponding position of the driven chain wheel, so that the cutting depth of the chain saw structure is limited; be equipped with limit structure between saw cover and the sash, limit structure is used for after removing the saw cover according to the demand, the restriction saw cover removes.
2. The acetabular circular depth-limiting electric bone saw of claim 1, wherein the rotation axis of the driving sprocket and the rotation axis of the driven chain saw are perpendicular to the length direction of the saw frame and parallel to the handle.
3. The acetabular circular depth-limiting electric bone saw according to claim 1, wherein the limiting structure comprises a rack, a screw and a thumb wheel; the saw sleeve is provided with a position-giving opening; the rack is arranged at the saw frame and is parallel to the length direction of the saw frame; the screw rod is axially and rotatably arranged in the saw sleeve, is parallel to the length direction of the saw frame and is meshed with the rack; the poking wheel is fixedly sleeved at the screw and penetrates through the position-giving opening.
4. The acetabulum circular depth limiting electric bone saw according to claim 1, wherein the head end of the saw frame is provided with two mounting plates, the mounting plates are in a long strip shape, the two mounting plates are arranged oppositely, and the length direction of the two mounting plates is consistent with the length direction of the saw frame; a gap is reserved between the two mounting plates, the driven chain wheel and the driving chain wheel are arranged between the gaps, and the part of the chain meshed to the driven chain wheel is positioned outside the gap; the saw sleeve is sleeved on the mounting plate.
5. The acetabular circular depth-limiting electric bone saw according to claim 1, wherein the drive mechanism comprises a rotary motor, an output shaft of the rotary motor is in transmission connection with a rotary shaft of the drive sprocket to drive the drive sprocket to rotate.
6. The acetabular circular depth-limiting electric bone saw of claim 5, wherein the drive mechanism further comprises a worm gear and a worm; the worm is coaxially connected with an output shaft of the rotating motor, the rotating motor is arranged at the tail end of the saw frame, and the worm is arranged along the length direction of the saw frame; the worm wheel is sleeved on the rotating shaft of the driving chain wheel and meshed with the spiral teeth of the worm.
7. The acetabular circular depth-limiting electric bone saw of claim 5, wherein the drive mechanism further comprises a first bevel gear and a second bevel gear; the first bevel gear is sleeved at the output shaft of the rotating motor, the rotating motor is arranged at the tail end of the saw frame, and the output shaft of the rotating motor is arranged along the length direction of the saw frame; the second bevel gear is sleeved at the rotating shaft of the driving chain wheel and meshed with the first bevel gear.
8. The acetabular circular depth-limiting electric bone saw according to claim 5, wherein the driving mechanism further comprises a transmission, an input shaft of the transmission is in transmission connection with an output shaft of the rotating motor, and an output shaft of the transmission is in transmission connection with a rotating shaft of the driving sprocket.
9. The acetabular circular depth-limiting electric bone saw of claim 8, wherein the transmission is a planetary sprocket transmission.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122716647.2U CN217118514U (en) | 2021-11-08 | 2021-11-08 | Round depth-limiting electric bone saw for acetabulum |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122716647.2U CN217118514U (en) | 2021-11-08 | 2021-11-08 | Round depth-limiting electric bone saw for acetabulum |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114246633A (en) * | 2021-11-08 | 2022-03-29 | 莆田学院 | Round depth-limiting electric bone saw for acetabulum |
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2021
- 2021-11-08 CN CN202122716647.2U patent/CN217118514U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114246633A (en) * | 2021-11-08 | 2022-03-29 | 莆田学院 | Round depth-limiting electric bone saw for acetabulum |
| CN114246633B (en) * | 2021-11-08 | 2024-03-01 | 莆田学院 | Circular depth-limiting electric bone saw for acetabulum |
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