CN110547845B - Grinding handle power transmission mechanism with adjustable swing angle and grinding tool - Google Patents
Grinding handle power transmission mechanism with adjustable swing angle and grinding tool Download PDFInfo
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- CN110547845B CN110547845B CN201910935380.0A CN201910935380A CN110547845B CN 110547845 B CN110547845 B CN 110547845B CN 201910935380 A CN201910935380 A CN 201910935380A CN 110547845 B CN110547845 B CN 110547845B
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 153
- 230000007246 mechanism Effects 0.000 title claims abstract description 30
- 230000033001 locomotion Effects 0.000 claims abstract description 19
- 210000004872 soft tissue Anatomy 0.000 abstract description 18
- 238000004804 winding Methods 0.000 abstract description 7
- 230000010355 oscillation Effects 0.000 description 8
- 210000000078 claw Anatomy 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 210000005036 nerve Anatomy 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000004204 blood vessel Anatomy 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000007789 sealing Methods 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, e.g. tourniquets
- A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/32—Surgical cutting instruments
- A61B17/3209—Incision instruments
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- Heart & Thoracic Surgery (AREA)
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- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
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- Transmission Devices (AREA)
Abstract
The invention provides a grinding handle power transmission mechanism with an adjustable swing angle and a grinding cutter, which comprise an input shaft and an output shaft which are arranged in a shell, wherein an intermediate transmission part for transmitting power is arranged between the input shaft and the output shaft, an eccentric transmission part is eccentrically arranged on the input shaft, the intermediate transmission part is provided with an input part matched with the eccentric transmission part of the input shaft and an output part matched with the output shaft, the eccentric transmission part and the input part convert unidirectional rotation motion of the input shaft into reciprocating swing of the intermediate transmission part, and the output part drives the output shaft to swing reciprocally; the shell is also provided with an adjusting structure for adjusting the relative distance between one of the middle transmission piece, the input shaft and the output shaft and the other two. The invention converts continuous unidirectional circular rotation motion into reciprocating swing within a certain angle range in the circumferential direction, thereby avoiding the cutter head from winding soft tissues; and can realize the regulation of swing angle, adapt to the demand of different swing amplitudes.
Description
Technical Field
The invention belongs to the technical field of medical appliances, and particularly relates to a grinding handle power transmission mechanism with an adjustable swing angle and a grinding cutter.
Background
In surgery, a medical grinding tool is generally used for grinding bone tissue or soft tissue in a human body, and the existing grinding tool generally adopts a power handle to drive a grinding head/tool bit to rotate at a high speed for grinding. Because the grinding heads/the cutter heads do 360-degree circular rotation, hidden danger of winding surrounding soft tissues exists in the operation process, and under the condition of high-speed rotation, the soft tissues are twisted once being wound; in particular, the damage degree to soft tissues such as blood vessels, nerves and the like is high, and the damage to patients once the nerves are wound on the cutting edge of the grinding head/the cutting head is very large.
Although grinding tools capable of reciprocating swing are currently available, the swing angle range is not adjustable, and thus the adaptability is poor.
Disclosure of Invention
In view of the above-described drawbacks of the prior art, an object of the present invention is to provide a grinding handle power transmission mechanism with an adjustable swing angle, which changes the circular motion into a reciprocating swing, prevents the cutter head from winding soft tissue, and can adjust the swing angle.
To achieve the above object and other related objects, the present invention provides the following technical solutions:
the grinding handle power transmission mechanism with the adjustable swing angle is used for transmitting the power of a power handle to a cutter head and comprises an input shaft and an output shaft, wherein the input shaft is arranged in a shell and used for connecting the power, the output shaft is connected with the cutter head, an intermediate transmission part used for transmitting the power is arranged between the input shaft and the output shaft, an eccentric transmission part is eccentrically arranged on the input shaft, the intermediate transmission part is provided with an input part matched with the eccentric transmission part of the input shaft and an output part matched with the output shaft, the eccentric transmission part and the input part convert the unidirectional rotation motion of the input shaft into the reciprocating swing of the intermediate transmission part, and the output part transmits the power of the reciprocating swing to the output shaft to drive the output shaft to reciprocate swing; the shell is also provided with an adjusting structure, and the adjusting structure is used for driving the middle transmission piece, the input shaft or the output shaft to deviate in the direction perpendicular to the axis of the input shaft, and adjusting the relative distance between one of the middle transmission piece, the input shaft and the output shaft and the other two.
By adopting the structure, the circumferential rotary motion mode of the traditional cutter head is changed, the continuous unidirectional circumferential rotary motion is converted into reciprocating swing within a certain angle range in the circumferential direction, and when the cutter head is connected with the power output shaft, the cutter head swings back and forth around the central line of the power output shaft in the circumferential direction of the power output shaft, so that the cutter head is prevented from winding soft tissues; and the soft tissue has certain elasticity, so that the cutter head can be avoided when the cutter head swings reciprocally, and the damage to the soft tissue is reduced. In addition, as the middle transmission part is arranged between the input shaft and the output shaft, and the offset distance between the input shaft and the middle transmission part and/or between the output shaft and the middle transmission part can be changed by adjusting the input shaft, the output shaft or the middle transmission part, the swing amplitude in the transmission process is changed, the adjustment of the swing angle is further realized, and the requirements of different swing amplitudes are met.
Alternatively, adjusting the relative distance between one of the intermediate transmission member, the input shaft, and the output shaft and the other two may be performed in one of the following ways: adjusting the offset distance of the center of oscillation of the intermediate transmission member relative to the axis of the input shaft and the axis of the output shaft, adjusting the offset distance of the axis of the input shaft relative to the center of oscillation of the intermediate transmission member, adjusting the offset distance of the eccentric transmission member relative to the center of oscillation of the intermediate transmission member, adjusting the offset distance of the center of oscillation of the intermediate transmission member relative to the axis of the output shaft, adjusting the offset distance of the axis of the output shaft relative to the center of oscillation of the intermediate transmission member, or adjusting the offset distance of the output portion relative to the axis of the output shaft.
Optionally, the input shaft is installed in the shell through a first bearing, the eccentric transmission part is a first transmission shaft eccentrically arranged at the output end of the input shaft, and a second bearing is sleeved on the first transmission shaft.
Optionally, the intermediate transmission member includes an intermediate shaft, the input portion is a pair of first lugs disposed at an input end of the intermediate shaft, and the second bearing is located between the two first lugs and tangential to the second lugs.
Optionally, the output part is a second transmission shaft arranged at the output end of the intermediate shaft, the second transmission shaft is eccentrically arranged relative to the intermediate shaft, and a third bearing is sleeved on the second transmission shaft.
Optionally, the input end of the output shaft is provided with two second lugs oppositely, and the third bearing is located between the two second lugs and tangential to the second lugs.
Optionally, the input shaft is coincident with the axis of the output shaft, or the input end of the input shaft is connected with the power access shaft through a speed reducing mechanism, the input shaft is mounted on the shell through an eccentric bearing seat, the output shaft is coincident with the axis of the power access shaft, and the axis of the input shaft is offset relative to the axis of the output shaft.
Optionally, the adjusting structure comprises a support seat for mounting an intermediate transmission member and an adjusting member for moving the support seat in a direction perpendicular to the axis of the input shaft, the intermediate transmission member being rotatably mounted on the support seat with its rotation centre line parallel to the axis of the input shaft, the support seat driving the intermediate transmission member to be offset relative to the input shaft and/or the output shaft when the adjusting member is operated.
Optionally, the supporting seat is an adjusting shaft vertically installed on the shell relative to the input shaft, one end of the adjusting shaft is provided with external threads, the adjusting component is a nut which is rotatably arranged on the shell along the axis of the adjusting component, the nut is sleeved on a threaded section of the adjusting shaft, and the shell limits the movement of the nut in the axial direction of the adjusting shaft.
Optionally, a limiting structure for limiting the support seat to rotate is arranged on the shell.
Optionally, a mounting groove is formed in the inner wall of the shell, the first end of the adjusting shaft is matched with the adjusting component, the second end of the adjusting shaft stretches into the mounting groove, an elastic element is arranged in the mounting groove, and the elastic element abuts against the second end of the adjusting shaft.
Optionally, a window for loading the supporting seat is formed in the shell, a cover plate with a through hole is mounted on the window, and the nut is mounted in the through hole of the cover plate and extends out of the cover plate.
The invention also provides a grinding cutter which comprises the swing angle-adjustable grinding handle power transmission mechanism.
As described above, the invention has the beneficial effects that: according to the invention, the circumferential rotary motion mode of the traditional cutter head is changed, continuous rotary motion is converted into circumferential reciprocating swing within a certain angle range, and when the cutter head is connected with the power output shaft, the cutter head swings back and forth along the circumferential direction around the central line of the power output shaft, so that the cutter head is prevented from winding soft tissues; and the soft tissue has certain elasticity, so that the cutter head can be avoided when the cutter head swings reciprocally, and the damage to the soft tissue is reduced.
In addition, because the middle transmission part is arranged between the input shaft and the output shaft, the position of the input shaft, the output shaft or the middle transmission part in the direction vertical to the axis of the handle can be adjusted through the adjusting structure, the relative offset between the input shaft and the middle transmission part or between the output shaft and the middle transmission part is changed, so that the swing amplitude in the transmission process is changed, the adjustment of the swing angle is realized, and the requirements of different swing amplitudes are met.
Drawings
FIG. 1 is a schematic view of the installation of a power transmission mechanism on a handle housing in an embodiment of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1;
FIG. 3 is a schematic diagram of a driving structure of a power transmission mechanism according to an embodiment of the present invention;
FIGS. 4 and 5 are exploded views of a power transmission mechanism in accordance with an embodiment of the present invention;
FIG. 6 is a schematic diagram of an intermediate transmission member according to an embodiment of the present invention;
FIG. 7 is a schematic view of the structure of an output shaft according to an embodiment of the present invention;
FIG. 8 is a schematic view of a supporting seat according to an embodiment of the present invention;
FIG. 9 is a schematic view of a cover plate according to an embodiment of the invention
Fig. 10 is a schematic view of another implementation of the power transmission mechanism in an embodiment of the invention.
Part number description:
100-a housing; 101-a mounting groove; 200-an input shaft; 201-a first drive shaft; 202-a second bearing; 203-bearing seats; 204-a first bearing; 300-intermediate shaft; 301-a first ear plate; 302-a second drive shaft; 303-a third bearing; 304-a fifth bearing; 400-output shaft; 401-a second ear plate; 402-fourth bearings; 500-driving claws; 600-supporting seat; 601-thread segments; 602-a nut; 603-an elastic element; 604-a via; 605-a rotation limiting block; 606-a knob; 700-power access shaft; 800-a speed reducing mechanism; 900-cover plate; 901-a limit groove; 902-limit steps.
Detailed Description
Further advantages and effects of the present invention will become apparent to those skilled in the art from the disclosure of the present invention, which is described by the following specific examples.
In this example, the front-rear direction is the direction toward the patient and the direction away from the patient when the grinding tool is operated.
Examples
As shown in fig. 1 to 5, a grinding handle power transmission mechanism with an adjustable swing angle is provided, wherein a grinding cutter comprises a power handle, a cutter head used for grinding and the like, the power transmission mechanism is used for transmitting the power of the power handle to the cutter head, and the power transmission mechanism is directly or indirectly connected with a driving motor of the power handle.
The power transmission mechanism comprises an input shaft 200 and an output shaft 400 which are arranged in the shell 100, wherein the input shaft 200 is used for connecting power (such as rotary power directly or indirectly transmitted by a motor), and the output shaft 400 is used for connecting with the cutter head to transmit reciprocating swing to the cutter head; the key point is that an intermediate transmission member for transmitting power is arranged between the input shaft 200 and the output shaft 400, an eccentric transmission member is eccentrically arranged on the input shaft 200, the eccentric transmission member is eccentrically arranged relative to the axis of the input shaft 200, the intermediate transmission member is provided with an input part matched with the eccentric transmission member of the input shaft 200, when the input shaft 200 is in operation, unidirectional continuous rotation motion is carried out on the input shaft 200, and the unidirectional rotation motion of the input shaft 200 is converted into reciprocating swing of the intermediate transmission member by a matched structure of the eccentric transmission member and the input part. The intermediate transmission member is also provided with an output part matched with the output shaft 400, and the output part follows the intermediate transmission member to swing reciprocally, and transmits the power of the reciprocal swing to the output shaft 400 to drive the output shaft 400 to swing reciprocally.
Wherein the axis of the input shaft 200 is parallel or coincident with the axis of the output shaft 400, and the swing center line of the intermediate transmission member is parallel with the axes of the input shaft 200 and the output shaft 400.
Wherein, the shell 100 is further provided with an adjusting structure for driving the intermediate transmission member, the input shaft 200 or the output shaft 400 to deviate in a direction perpendicular to the axis of the input shaft 200, that is, deviate in the radial direction of the input shaft 200 or the output shaft 400, so as to adjust the relative distance between one of the intermediate transmission member, the input shaft 200 and the output shaft 400 and the other two; the influence on the swing amplitude is mainly two transmission links: a transmission between the input shaft 200 and the intermediate connection, and a transmission between the intermediate connection and the output shaft 400; thus, the relative distance between the intermediate transmission member and the input shaft 200 (the relative distance in the direction perpendicular to the axial direction of the input shaft 200) and/or the relative distance between the intermediate transmission member and the output shaft 400 (the relative distance in the direction perpendicular to the axial direction of the input shaft 200) is mainly adjusted.
By adopting the structure, the circumferential rotary motion mode of the traditional cutter head is changed, the continuous unidirectional circumferential rotary motion is converted into reciprocating swing within a certain angle range in the circumferential direction, and when the cutter head is connected with the power output shaft 400, the cutter head swings back and forth around the central line of the power output shaft 400 in the circumferential direction of the power output shaft 400, so that the cutter head is prevented from winding soft tissues; and the soft tissue has certain elasticity, so that the cutter head can be avoided when the cutter head swings reciprocally, and the damage to the soft tissue is reduced. In addition, since the intermediate transmission member is arranged between the input shaft 200 and the output shaft 400, and the offset distance between the input shaft 200 and the intermediate transmission member and/or between the output shaft 400 and the intermediate transmission member can be changed by adjusting the input shaft 200, the output shaft 400 or the intermediate transmission member through the adjusting structure, the swing amplitude in the transmission process is changed, the adjustment of the swing angle is further realized, and the requirements of different swing amplitudes are met.
Wherein, the relative distance between the intermediate transmission member and the input shaft 200 can be adjusted by one or more of the following ways:
The input shaft 200 and the output shaft 400 are stationary, offsetting the intermediate transmission member parallel with respect to the input shaft 200; i.e. to vary the offset of the centre of oscillation of the intermediate transmission with respect to the axis of the input shaft 200 and the axis of the output shaft 400; or the intermediate drive member is stationary and the output shaft 400 is stationary, offsetting the input shaft 200 relative to the intermediate drive member; changing the offset of the axis of the input shaft 200 relative to the centre of oscillation of the intermediate transmission, of course simultaneously changing the relative distance between the input shaft 200 and the output shaft 400; or the intermediate transmission member and the input shaft 200 are stationary, and the offset of the eccentric transmission member with respect to the swing center of the intermediate transmission member, that is, the position of the eccentric transmission member in the radial direction of the input shaft 200 is adjusted. Thereby realizing a change in swing angle between the input shaft 200 and the intermediate transmission member, and indirectly changing the swing angle of the output shaft 400.
The adjustment of the relative distance between the intermediate transmission member and the output shaft 400 may be by one or more of the following: the input shaft 200 and the output shaft 400 are fixed, the intermediate transmission member is offset relative to the output shaft 400, and the offset of the swing center of the intermediate transmission member relative to the axis of the output shaft 400 is adjusted; or the intermediate transmission member is stationary and the input shaft 200 is stationary, so that the output shaft 400 is offset relative to the intermediate transmission member, i.e., the offset of the axis of the output shaft 400 relative to the center of oscillation of the intermediate transmission member is adjusted; or both the intermediate transmission member and the output shaft 400 are stationary, the offset of the center of the output portion with respect to the axis of the output shaft 400 is adjusted, i.e., the position of the output portion in the radial direction of the intermediate transmission member is changed.
In this example, the center line of swing of the intermediate transmission member is changed, and other modes are the same in principle:
As shown in fig. 2 to 7, specifically, the input shaft 200 is mounted in the housing 100 through a first bearing 204 and a bearing housing 203, and the axial position is limited by a collar or the like; the eccentric transmission member is a first transmission shaft 201 arranged on the end face of the output end of the input shaft 200, the first transmission shaft 201 is parallel to the input shaft 200, the axis of the first transmission shaft 201 is offset relative to the axis of the input shaft 200, and a second bearing 202 is sleeved on the first transmission shaft 201.
The intermediate transmission member comprises an intermediate shaft 300, the input end of the intermediate shaft 300 is provided with the input part, the output end of the intermediate shaft 300 is provided with the output part, wherein the input part is a pair of first ear plates 301 (or a radial through groove is formed in the end face of the input end of the intermediate shaft 300, two side walls of the through groove are in contact with the outer ring of the second bearing 202), the two first ear plates 301 are arranged opposite to each other, the second bearing 202 is positioned between the two first ear plates 301, and in contact with the first ear plates 301 when the first transmission shaft 201 rotates, and the intermediate shaft 300 is driven to swing reciprocally through the first ear plates 301. The second bearing 202 provides for a low friction and impact force when a relative movement is generated between the first transmission shaft 201 and the first ear plate 301.
The output part is a second transmission shaft 302 disposed at an output end face of the intermediate shaft 300, the second transmission shaft 302 is parallel to the intermediate shaft 300, the second transmission shaft 302 is eccentrically disposed relative to the intermediate shaft 300, and a third bearing 303 is sleeved on the second transmission shaft 302.
The output shaft 400 is mounted in the housing 100 through a fourth bearing 402, two second ear plates 401 are disposed opposite to the input end of the output shaft 400 (or radial through grooves are formed in the end face of the input end of the output shaft 400, two side walls of the through grooves are in contact with the outer ring of the third bearing 303), the third bearing 303 is located between the two second ear plates 401 and is in contact with at least one second ear plate 401, usually both the two ear plates, so that impact is reduced, and the output shaft 400 is driven to swing through the third bearing 303 and the second ear plates 401 when the second transmission shaft 302 swings.
In this example, in order to achieve the deceleration of the input end, a deceleration mechanism 800 and a power access shaft 700 are further disposed at the input end of the input shaft 200, wherein the power access shaft 700 is directly or indirectly connected to the output end of the motor, and the axis of the power access shaft 700 coincides with the axis of the output shaft 400; bearing housing 203 is an eccentric structure, and after input shaft 200 is mounted on bearing housing 203, the axis of input shaft 200 is offset relative to power access shaft 700, and reduction mechanism 800 is a gear set engaged in a radial direction, one of which is connected to power access shaft 700, and the other of which is fixed to input shaft 200, in this case an internally engaged gear set, as shown in fig. 1 and 2.
In another embodiment, the input shaft 200 coincides with the axis of the output shaft 400, without the reduction mechanism 800 and the power access shaft 700, as shown in fig. 10.
A driving claw 500 is connected to the output end of the output shaft 400 for facilitating the butt joint of the cutter head.
As shown in fig. 2, 8 and 9, the adjusting structure includes a supporting seat 600 for mounting an intermediate transmission member and an adjusting component for moving the supporting seat 600 along a direction perpendicular to an axis of the input shaft 200, the intermediate transmission member is rotatably mounted on the supporting seat 600 along its own axis, a rotation center line of the intermediate transmission member is parallel to the axis of the input shaft 200, in this example, a through hole 604 is formed in the supporting seat 600 along the axis direction of the input shaft 200, the intermediate transmission member is in a columnar structure (i.e. the above intermediate shaft 300), and the intermediate shaft 300 is mounted in the through hole 604 through a fifth bearing 304 and is limited in an axial direction; when the adjusting part is operated, the supporting seat 600 drives the intermediate transmission member to deviate relative to the input shaft 200 and the output shaft 400, so that the positional relationship between the first transmission shaft 201 and the first ear plate 301 and the positional relationship between the second transmission shaft 302 and the second ear plate 401 of the output shaft 400 are changed, and the purpose of changing the swinging angle is achieved.
The adjustment mode of the support base 600 and the adjustment component can be a threaded or a latch mode, for example, a lead screw nut, a rack and pinion, a worm and gear and the like, or a mode of locking the support base 600 through a bolt and a hole after being pulled out can be adopted. In this example, a spindle nut is illustrated.
Referring to fig. 2, the support 600 is an adjusting shaft vertically mounted on the housing 100 with respect to the input shaft 200, in which the upper end of the adjusting shaft has a threaded section 601, the adjusting shaft can move up and down (in the illustrated orientation) in the housing 100, the adjusting member is a nut 602 rotatably provided on the housing 100 along its own axis, the nut 602 is sleeved on the threaded section 601 of the adjusting shaft, the housing 100 restricts the up and down movement of the nut 602, and when the nut 602 is screwed, the nut 602 rotates only and does not move up and down, thereby enabling the adjusting shaft to move up and down, and realizing the adjustment of the position of the intermediate shaft 300. To facilitate threading, a knob 606 is fixedly mounted on the nut 602.
To prevent the adjustment shaft from rotating along its axis when the nut 602 rotates, a limiting structure for limiting the rotation of the adjustment shaft is provided on the housing 100. Specifically, a flat groove may be provided in the housing 100, a flat block that mates with the groove may be provided in the adjustment shaft, so as to prevent rotation thereof, in this example, a non-circular rotation limiting block 605 is provided in the adjustment shaft, and a limiting groove 901 is provided in the housing 100.
Specifically, a window (top of the casing 100 in fig. 2) for loading the supporting seat 600 is formed on the casing 100, a cover plate 900 is fixedly and hermetically installed on the window, a through hole is formed in the middle of the cover plate 900, a nut 602 is installed in the through hole of the cover plate 900, the top of the nut 602 extends out of the cover plate 900, a limit groove 901 in this example is formed on the inner side of the cover plate 900, and a rotation limiting block 605 extends into the limit groove 901; the outer end of the through hole of the cover plate 900 is provided with a limiting step 902, the nut 602 is installed into the through hole from the inner side of the cover plate 900, a boss on the outer wall of the nut 602 abuts against the limiting step 902, and the nut 602 is prevented from sliding out of the cover plate 900, so that axial limiting is achieved. Sealing rings are respectively arranged between the nut 602 and the cover plate 900 and between the cover plate 900 and the shell 100.
In one embodiment, to prevent the adjustment shaft from rocking at the end (lower end in fig. 2) remote from the nut 602 after adjustment; a mounting groove 101 is formed in the inner wall of the bottom of the shell 100, a first end (upper end in fig. 2) of the adjusting shaft is matched with the nut 602, a second end (lower end) of the adjusting shaft stretches into the mounting groove 101, an elastic element 603 is arranged in the mounting groove 101, and the elastic element 603 abuts against the second end of the adjusting shaft, so that the adjusting shaft is ensured to abut against any adjusting position, and swinging is prevented; in this example, a hole is formed in the second end face of the adjusting shaft, one end of the elastic element 603 extends into the hole, the other end of the elastic element abuts against the bottom of the mounting groove 101, and the elastic element 603 can be a spring.
In this example, the cover 900 further limits the stroke of the lifting adjustment of the adjusting shaft; in another embodiment, the mounting groove 101 and the second end of the adjustment shaft may be designed to limit the rotation of the adjustment shaft.
On the basis, the invention also provides a grinding cutter, which comprises the grinding handle power transmission mechanism with the adjustable swing angle in any embodiment, wherein the output end of the power transmission mechanism is connected with a cutter head, and the input end of the power transmission mechanism is connected with a motor.
According to the invention, the circumferential rotary motion mode of the traditional cutter head is changed, continuous rotary motion is converted into circumferential reciprocating swing within a certain angle range, and when the cutter head is connected with the power output shaft 400, the cutter head swings back and forth along the circumferential direction around the central line of the power output shaft 400, so that the cutter head is prevented from winding soft tissues; and the soft tissue has certain elasticity, so that the cutter head can be avoided when the cutter head swings reciprocally, and the damage to the soft tissue is reduced.
In addition, since the intermediate transmission member is arranged between the input shaft 200 and the output shaft 400, and the position of the input shaft 200, the output shaft 400 or the intermediate transmission member in the direction perpendicular to the axis of the handle can be adjusted through the adjusting structure, the relative offset between the input shaft 200 and the intermediate transmission member or between the output shaft 400 and the intermediate transmission member is changed, so that the swing amplitude in the transmission process is changed, the adjustment of the swing angle is further realized, the requirements of different swing amplitudes are met, and the operation is convenient.
Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (7)
1. The utility model provides a grinding handle power transmission mechanism of swing angle adjustable for with the power transmission of power handle to tool bit, its characterized in that: the device comprises an input shaft and an output shaft, wherein the input shaft is arranged in a shell and used for connecting power, the output shaft is used for being connected with a cutter head, an intermediate transmission part used for transmitting power is arranged between the input shaft and the output shaft, an eccentric transmission part is eccentrically arranged on the input shaft, the intermediate transmission part is provided with an input part matched with the eccentric transmission part of the input shaft and an output part matched with the output shaft, the eccentric transmission part and the input part convert unidirectional rotation motion of the input shaft into reciprocating swing of the intermediate transmission part, and the output part transmits the power of the reciprocating swing to the output shaft to drive the output shaft to reciprocate; the shell is also provided with an adjusting structure which is used for driving the middle transmission piece to deviate in the direction perpendicular to the axis of the input shaft and adjusting the distance between the middle transmission piece and the input shaft and the output shaft;
The input shaft is arranged in the shell through a first bearing, the eccentric transmission part is a first transmission shaft eccentrically arranged at the output end of the input shaft, and a second bearing is sleeved on the first transmission shaft; the intermediate transmission piece comprises an intermediate shaft, the input part is a pair of first lug plates arranged at the input end of the intermediate shaft, and the second bearing is positioned between the two first lug plates and tangential to the first lug plates; the output part is a second transmission shaft arranged at the output end of the intermediate shaft, the second transmission shaft is eccentrically arranged relative to the intermediate shaft, and a third bearing is sleeved on the second transmission shaft; the input end of the output shaft is oppositely provided with two second ear plates, and the third bearing is positioned between the two second ear plates and tangent to the second ear plates;
The input shaft is coincident with the axis of the output shaft, or the input end of the input shaft is connected with a power access shaft through a speed reducing mechanism, the input shaft is arranged on the shell through an eccentric bearing seat, the output shaft is coincident with the axis of the power access shaft, and the axis of the input shaft is offset relative to the axis of the output shaft.
2. The swing angle adjustable grinding handle power transmission mechanism according to claim 1, wherein: the adjusting structure comprises a supporting seat for installing an intermediate transmission part and an adjusting part for enabling the supporting seat to move along the axis direction perpendicular to the input shaft, the intermediate transmission part is rotatably installed on the supporting seat, the rotation center line of the intermediate transmission part is parallel to the axis of the input shaft, and when the adjusting part is operated, the supporting seat drives the intermediate transmission part to deviate relative to the input shaft and the output shaft.
3. The swing angle adjustable grinding handle power transmission mechanism according to claim 2, wherein: the supporting seat is an adjusting shaft which is vertically arranged on the shell relative to the input shaft, one end of the adjusting shaft is provided with external threads, the adjusting part is a nut which is rotatably arranged on the shell along the axis of the adjusting part, the nut is sleeved on the threaded section of the adjusting shaft, and the shell limits the movement of the nut in the axial direction of the adjusting shaft.
4. The swing angle adjustable grinding handle power transmission mechanism according to claim 2, wherein: the shell is provided with a limiting structure for limiting the support seat to rotate.
5. A swing angle adjustable grinding handle power transmission according to claim 3, wherein: the mounting groove is formed in the inner wall of the shell, the first end of the adjusting shaft is matched with the adjusting part, the second end of the adjusting shaft stretches into the mounting groove, an elastic element is arranged in the mounting groove, and the elastic element abuts against the second end of the adjusting shaft.
6. The swing angle adjustable grinding handle power transmission mechanism according to claim 5, wherein: the shell is provided with a window for loading the supporting seat, the window is provided with a cover plate with a through hole, and the nut is arranged in the through hole of the cover plate and extends out of the cover plate.
7. A grinding tool, characterized in that: a grinding handle power transmission mechanism comprising an adjustable swing angle according to any one of claims 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910935380.0A CN110547845B (en) | 2019-09-29 | 2019-09-29 | Grinding handle power transmission mechanism with adjustable swing angle and grinding tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910935380.0A CN110547845B (en) | 2019-09-29 | 2019-09-29 | Grinding handle power transmission mechanism with adjustable swing angle and grinding tool |
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| CN110547845A (en) | 2019-12-10 |
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