Medical hand-held type steel wire tightens up base
阅读说明：本技术 一种医用手持式钢丝线收紧底座 (Medical hand-held type steel wire tightens up base ) 是由 不公告发明人 于 2020-06-10 设计创作，主要内容包括：本发明公开一种医用手持式钢丝线收紧底座,包括左挡杆、基座、顶板、升降轴、中挡杆、右挡杆、中央锥齿轮、左齿轮组、右齿轮组、扳机,左挡杆通过左摆弹簧、左锥顶、左摆动件、左转套实现左齿轮组的上下移动和定位,右挡杆通过右摆弹簧、右锥顶、右摆动件、右转套实现右齿轮组的上下移动和定位,中挡杆通过第一弹簧、弧槽摆板、左连杆、右连杆、升降架实现升降轴的上下移动的定位,滑台和扳机的往复动作通过滑台弹簧、平行杆、扳机弹簧实现齿条与左齿轮组或右齿轮组的往复啮合和脱离,从而通过左齿轮组或右齿轮组与中央锥齿轮的啮合实现升降轴的正转或反转,实现双线头收紧机构或单线头收紧机构对钢丝线的收紧或放松。(The invention discloses a medical hand-held steel wire tightening base, which comprises a left stop lever, a base, a top plate, a lifting shaft, a middle stop lever, a right stop lever, a central bevel gear, a left gear set, a right gear set and a trigger, wherein the left stop lever realizes the up-and-down movement and positioning of the left gear set through a left swing spring, a left cone top, a left swinging piece and a left rotating sleeve, the right stop lever realizes the up-and-down movement and positioning of the right gear set through a right swing spring, a right cone top, a right swinging piece and a right rotating sleeve, the middle stop lever realizes the up-and-down movement positioning of the lifting shaft through a first spring, an arc groove swinging plate, a left connecting rod, a right connecting rod and a lifting frame, the reciprocating motion of a sliding table and the trigger realizes the reciprocating engagement and disengagement of a rack and the left gear set or the right gear set through the sliding table spring, a parallel rod and the trigger spring, so that the forward rotation, the steel wire is tightened or loosened by the double-wire-end tightening mechanism or the single-wire-end tightening mechanism.)
1. The utility model provides a base is tightened up to medical hand-held type steel wire line, including base (101), roof (102), lift axle (103), left pin (104), well pin (105), right pin (106), slip table spring (107), rack (108), crane (109), central bevel gear (110), left connecting rod (111), left gear train (112), left swinging member (113), left conical crown (114), first spring (115), arc groove swinging plate (116), right conical crown (117), right swinging member (118), right gear train (119), right connecting rod (120), slip table (121), parallel bar (122), trigger spring (123), trigger (124), right pendulum spring (125), right side commentaries on classics cover (126), left commentaries on classics cover (127), left pendulum spring (128), its characterized in that: the top plate (102) and the base (101) provide support for the movement of the above components, the central bevel gear (110) and the top plate (102) form a revolute pair, the lifting shaft (103) and the central bevel gear (110) form a revolute pair through spline connection, the left gear set (112) and the right gear set (119) can rotate and move up and down relative to the base (101), the left stop lever (104) realizes the up-and-down movement and positioning of the left gear set (112) through a left swing spring (128), a left cone top (114), a left swing piece (113) and a left rotation sleeve (127), the right stop lever (106) realizes the up-and-down movement and positioning of the right gear set (119) through a right swing spring (125), a right cone top (117), a right swing piece (118) and a right rotation sleeve (126), the middle stop lever (105) realizes the up-and-down movement positioning of the lifting shaft (103) through a first spring (115), an arc groove swing plate (116), a left connecting rod (111), a right connecting, reciprocating action of the sliding table (121) and the trigger (124) realizes reciprocating engagement and disengagement of the rack (108) and the left gear set (112) or the right gear set (119) through a sliding table spring (107), a parallel rod (122) and a trigger spring (123), so that forward rotation or reverse rotation of the lifting shaft (103) is realized through engagement of the left gear set (112) or the right gear set (119) and the central bevel gear (110), and tightening or loosening of the steel wire by the double-wire-end tightening mechanism (3) or the single-wire-end tightening mechanism (4) is realized.
2. The medical hand-held wire tensioning mount according to claim 1, wherein: the upper end of the base (101) is a square cavity, the lower end of the base is provided with a handle (101.1), the two sides of the interior of the square cavity are provided with a left support plate (101.3) and a right support plate (101.2), the front end of the bottom of the square cavity is provided with a square empty groove, the two sides of the empty groove are provided with guide rail structures, a left gear set (112) is arranged in a round hole at the end part of the left support plate (101.3) and can rotate and move up and down relative to the left support plate (101.3), a right gear set (119) is arranged in a round hole at the end part of the right support plate (101.2) and can rotate and move up and down relative to the right support plate (101.2), the top plate (102) is fixedly connected with the upper end of the base (101) through screws, the upper side of the top plate (102) is provided with four inserting columns (102.1), the top end of each inserting column (102.1) is provided with an inclined surface, the middle position is provided, central bevel gear (110) is installed in the round hole of bevel gear frame (102.2), constitute the revolute pair, central bevel gear (110) center upper end is equipped with the internal spline, lift axle (103) upper end and lower extreme are external spline structure, lift axle (103) can be close to the round hole internal spline cooperation installation of intermediate position and reciprocate at roof (102), the external spline of lift axle (103) lower extreme and the internal spline cooperation installation of central bevel gear (110) upper end, and can reciprocate in the internal spline and can not break away from, round hole and lift axle (103) coaxial arrangement that lift (109) center was equipped with, and can drive lift axle (103) and reciprocate.
3. The medical hand-held wire tensioning mount according to claim 1, wherein: the left gear set (112) is provided with an upper bevel gear structure and a lower bevel gear structure, a left rotating sleeve (127) is arranged at the top end of the left gear set (112) and forms a rotating pair which can drive the left gear set (112) to move up and down, the left end of a left swinging piece (113) is of a plane structure, the right end of the left swinging piece (113) is provided with a long groove opening, the middle position of the left swinging piece and a top plate (102) form a rotating pair, extension shafts arranged at two ends of the left rotating sleeve (127) can slide in the long groove opening at the right end of the left swinging piece (113), the middle position of a left stop lever (104) and the top plate (102) form a rotating pair, the rotating shaft center and the rotating shaft center of the left swinging piece (113) are at the same horizontal height, the left end of the left stop lever (104) is of a plate-shaped structure which is convenient to pull up and down, a left swinging spring (128) and a left cone top (114) are arranged in the round hole at the right end, the left swinging, and can slide on the plane structure; the right gear set (119) is provided with an upper bevel gear structure and a lower bevel gear structure, a right rotating sleeve (126) is arranged at the top end of the right gear set (119) and forms a rotating pair which can drive the right gear set (119) to move up and down, the left end of a right swinging piece (118) is of a plane structure, the right end of the right swinging piece (118) is provided with a long groove opening, the middle position of the right swinging piece (118) and a top plate (102) form a rotating pair, extension shafts arranged at two ends of the right rotating sleeve (126) can slide in the long groove opening at the right end of the right swinging piece (118), the middle position of a right stop lever (106) and the top plate (102) form a rotating pair, the rotating axis and the rotating axis of the right swinging piece (118) are at the same horizontal height, the left end of the right stop lever (106) is of a plate-shaped structure which is convenient to be pulled up and down, a right swinging spring (125) and a right conical top (117) are arranged in a round hole at the right end, the right swinging, and can slide on the plane structure;
in an initial state, the left stop lever (104) is in an upward pulling state, the left swing spring (128) pushes the right end of the left cone top (114) to tightly push against the lower edge of the left end plane structure of the left swinging piece (113), and due to the lever action, the long groove opening at the right end of the left swinging piece (113) lifts the left rotating sleeve (127) to a high position, so that the left gear set (112) moves upwards to the high position, and the upper bevel gear structure of the left gear set (112) is disengaged from the central bevel gear (110); the right stop lever (106) is in an upward pulling state, a right swing spring (125) pushes the right end of a right cone top (117) to tightly push against the lower edge of a left end plane structure of the right swing piece (118), and due to the lever action, a long groove opening at the right end of the right swing piece (118) lifts the right rotating sleeve (126) to a high position, so that the right gear set (119) moves upwards to the high position, and an upper bevel gear structure of the right gear set (119) is disengaged from the central bevel gear (110); namely, in the initial state, the left gear lever (104) and the right gear lever (106) are both in an upward pulling state, and the left gear set (112) and the right gear set (119) are both in a high position disengaged from the central bevel gear (110);
when the left stop lever (104) is pulled anticlockwise downwards, the left swing spring (128) pushes the right end of the left conical top (114) to slide from the lower edge to the upper edge of the left end planar structure of the left swing piece (113), in the process, the left swing spring (128) is compressed and then extends, the left swing piece (113) rotates clockwise, the left gear set (112) moves downwards to a low position, and the upper bevel gear structure of the left gear set (112) is meshed with the central bevel gear (110); when the left stop lever (104) is pulled upwards clockwise, the left gear set (112) moves upwards to a high position and is disengaged from the central bevel gear (110);
when the right stop lever (106) is pulled downwards anticlockwise, the right swing spring (125) pushes the right end of the right conical top (117) to slide from the lower edge to the upper edge of the left end plane structure of the right swing piece (118), in the process, the right swing spring (125) is compressed and then extends, the right swing piece (118) rotates clockwise, the right gear set (119) moves downwards to a low position, and the upper bevel gear structure of the right gear set (119) is meshed with the central bevel gear (110); when the right bar (106) is pulled clockwise upward, the right gear set (119) moves upward to a high position and is disengaged from the central bevel gear (110).
4. The medical hand-held wire tensioning mount according to claim 1, wherein: the left ends of a left connecting rod (111) and a right connecting rod (120) and a top plate (102) form a coaxial rotating pair, the right ends of the left connecting rod and the right connecting rod form a long-strip empty groove, extension shafts arranged at the two ends of a lifting frame (109) respectively slide in the long-strip empty grooves at the right ends of the left connecting rod (111) and the right connecting rod (120), the middle position of an arc groove swinging plate (116) and the top plate (102) form a rotating pair, the rotating axis of the arc groove swinging plate is coaxial with the rotating axis of the left connecting rod (111) and the right connecting rod (120), the left end of the arc groove swinging plate (116) is provided with a cross rod, the right end of the arc groove swinging plate (116) is provided with an arc empty groove, the extension shafts arranged at the outer side of the middle position of the left connecting rod (111) and the right connecting rod (120) slide in the arc empty groove at the right end of the arc groove swinging plate (116), the middle position of a middle blocking rod (105) and a base (101) form a rotating pair, the left end of the middle blocking rod, a first spring (115) is arranged between the cross rod at the left end of the arc groove swinging plate (116) and the top plate (102), the first spring (115) is always in a stretched state, and the axle center of the mounting position at the right end of the first spring and the rotating axle center of the middle stop lever (105) are at the same horizontal height;
in an initial state, the middle stop lever (105) is in a downward pulling state, the first spring (115) tensions the cross rod at the left end of the arc groove swinging plate (116) to enable the cross rod to have a clockwise rotation trend, the upper end of the arc empty groove at the right end of the arc groove swinging plate (116) downwards props against the extending shafts of the left connecting rod (111) and the right connecting rod (120), the latter two have a clockwise rotation trend, and the lifting frame (109) drives the lifting shaft (103) to be at a low position;
the middle stop lever (105) is pulled upwards clockwise, in the process, the first spring (115) extends firstly and then shortens, the arc groove swinging plate (116) rotates anticlockwise, the lower end of an arc empty groove at the right end of the arc groove swinging plate (116) upwards props against extension shafts of the left connecting rod (111) and the right connecting rod (120), the left connecting rod (111) and the right connecting rod (120) rotate anticlockwise, and the lifting frame (109) drives the lifting shaft (103) to move upwards to a high position, so that the lifting shaft (103) extends upwards; when the middle stop lever (105) is pulled downwards anticlockwise, the lifting frame (109) drives the lifting shaft (103) to move downwards to a low position, and the lifting shaft (103) retracts downwards.
5. The medical hand-held wire tensioning mount according to claim 1, wherein: the sliding table (121) is arranged in a square hollow groove at the front end of the bottom of a square cavity of the base (101) to form a sliding pair, a sliding table spring (107) is arranged between the top end of the sliding table (121) and the front side of the square cavity of the base (101), a middle finger wrench (121.1) is arranged at the lower end of the sliding table (121), a left conical rack (108.2) and a right conical rack (108.1) are arranged on two sides of the rear end of each rack, a parallel rod (122), a rack (108) and the sliding table (121) form a rotating pair, the upper end of a trigger (124), the rack (108) and the sliding table (121) form a rotating pair, a quadrilateral structure is formed by the rack (108), the sliding table (121), the parallel rod (122) and the trigger (124), a trigger spring (123) is arranged between the middle position of the parallel rod (122) and the lower end;
in the initial state, under the action of the contraction and pulling force of a sliding table spring (107), the sliding table is positioned at the front end of a square cavity of the base (101), under the action of the contraction and pulling force of a trigger spring (123), a trigger (124) is in a forward extending state, and a rack (108) is in a low position;
if the central bevel gear (110) needs to rotate clockwise, the left stop lever (104) is pulled upwards to enable the left gear set (112) to be in a high position and to be disengaged from the central bevel gear (110), the right stop lever (106) is pulled downwards to enable the right gear set (119) to be in a low position, and the upper bevel gear structure of the right gear set (119) is engaged with the central bevel gear (110); the palm holds the handle, so that the thumb, the ring finger and the little finger hold the handle, the middle finger hooks the middle finger wrench (121.1), and the index finger hooks the trigger (124); firstly, the forefinger pulls the trigger (124) backwards to enable the trigger (124) to rotate clockwise, due to the structural characteristics of the parallelogram, the rack (108) moves upwards to the height meshed with the lower bevel gear structure of the right gear set (119), then the forefinger and the middle finger pull the middle finger wrench (121.1) and the trigger (124) backwards together to enable the rack (108) to be kept at a high position and move backwards, the right bevel rack (108.1) is meshed with the lower bevel gear structure of the right gear set (119), and the right gear set (119) rotates anticlockwise, so that the clockwise rotation of the central bevel gear (110) is realized; when the sliding table (121) moves to the rearmost end of the square empty groove of the base (101), the forefinger firstly loosens the trigger (124) to enable the sliding table to rotate forwards, the rack (108) descends to a low position under the action of the tensile force of the trigger spring (123) and is disengaged from the lower bevel gear structure of the right gear set (119), then the middle finger wrench (121.1) is loosened forwards, and the sliding table (121) moves forwards to an initial position under the action of the tensile force of the sliding table spring (107); the steps are repeated to realize the clockwise continuous rotation of the central bevel gear (110);
if the central bevel gear (110) needs to rotate anticlockwise, the left stop lever (104) is pulled downwards to enable the left gear set (112) to be in a low position, an upper bevel gear structure of the left gear set (112) is meshed with the central bevel gear (110), and the right stop lever (106) is pulled upwards to enable the right gear set (119) to be in a high position and to be disengaged from the central bevel gear (110); the palm holds the handle, so that the thumb, the ring finger and the little finger hold the handle, the middle finger hooks the middle finger wrench (121.1), and the index finger hooks the trigger (124); firstly, the forefinger pulls the trigger (124) backwards to enable the trigger (124) to rotate clockwise, due to the structural characteristics of the parallelogram, the rack (108) moves upwards to the height meshed with the lower bevel gear structure of the left gear set (112), then the forefinger and the middle finger pull the middle finger wrench (121.1) and the trigger (124) backwards together to enable the rack (108) to be kept at a high position and move backwards, the left bevel rack (108.2) is meshed with the lower bevel gear structure of the left gear set (112), and the left gear set (112) rotates clockwise, so that the counterclockwise rotation of the central bevel gear (110) is realized; when the sliding table (121) moves to the rearmost end of the square empty groove of the base (101), the forefinger firstly loosens the trigger (124) to enable the sliding table to rotate forwards, the rack (108) descends to a low position under the action of the tensile force of the trigger spring (123) and is disengaged from the lower bevel gear structure of the right gear set (119), then the middle finger wrench (121.1) is loosened forwards, and the sliding table (121) moves forwards to an initial position under the action of the tensile force of the sliding table spring (107); the continuous counterclockwise rotation of the central bevel gear (110) can be realized by repeating the above steps.
Technical Field
The invention relates to the technical field of medical instruments, in particular to a medical handheld steel wire tightening base.
Background
The kneecap is positioned in front of the knee joint, is the largest seed bone in a human body and is embedded in the quadriceps femoris tendon, is a triangular flat bone and participates in the formation of the knee joint, and the kneecap has the main functions of protecting the knee joint, avoiding the friction of the quadriceps femoris tendon on the cartilage surface of the condyle of the femur, transmitting the strength of the quadriceps femoris muscle and participating in the formation of a knee stretching device; also has the functions of maintaining the stability of the knee joint in the semi-squatting position, preventing the excessive adduction, abduction and flexion of the knee joint, having the function of a bicycle chain and increasing the rotation capacity of the knee joint.
Patellar fracture is a common fracture type in clinic, has high incidence rate, accounts for about 10 percent of all fractures, and is often caused by direct violence, indirect violence and mixed violence; the direct violence is mostly directly hit on the patella due to external force, such as bruise, kicking injury and the like, the fracture is mostly comminuted, the anterior tendinous membrane of the patella, the two side aponeuroses of the patella and the joint capsule are mostly kept intact, and the fracture can also be transverse fracture; indirect violence is usually caused by the violent contraction of quadriceps femoris muscle, which causes traction injury, such as sudden slipping, half flexion of knee joint, sudden contraction of quadriceps femoris muscle, upward traction of patella, and fixation of patella ligament at the lower part of patella, thereby causing fracture of patella.
When the patella fracture is repaired in a surgical mode, firstly, the patella main body and the fracture part need to be reset, then the patella main body and the fracture part are connected through the steel nails, in order to keep the stability of the fracture part after the fracture part is reset, the steel nails need to be arranged in an array along the circumferential direction of the patella, then, steel wires penetrate through the steel nails and are fastened and cut off, in the process of tightening the steel wires, tightening equipment needs to be used for operation, and generally, the following three conditions are common in the leading-out modes after the steel wires fix the steel needles, one is leading out of one single wire head, one is leading out of two wire heads, and the other is leading out of two single wire heads; at present, operations of leading out single-thread steel wire wires and leading out double-thread steel wire wires are respectively operated by two different tightening devices, and the operations of leading out two single-thread steel wire wires need two single-thread tightening devices, so that the medical cost is wasted, the space occupancy rate of the operation devices is increased, and the convenience of operation of doctors is influenced.
The Chinese patent with publication number CN110037788A discloses a medical instrument applied to patellar fracture repair, which comprises a rotating mechanism, a single-thread-head tensioning mechanism, a double-thread-head tensioning mechanism, a tensioning control mechanism and a power source, wherein the single-thread-head tensioning mechanism and the double-thread-head tensioning mechanism are respectively positioned at two ends of the rotating mechanism; after analysis, the technical scheme related in the invention patent has the following defects:
1) one device cannot solve the problem of operation involving two single-line head leading-out operations, and in case of the operation, two medical staff can only be used for operating the two devices to participate in the operation, so that medical resources are wasted, the working space of a doctor is occupied, and the operation efficiency is reduced;
2) in the technical scheme related to the invention patent, a single-thread-head tensioning mechanism and a double-thread-head tensioning mechanism are respectively positioned at two ends of a rotating mechanism, namely the equipment is simultaneously provided with the single-thread-head tensioning mechanism and the double-thread-head tensioning mechanism, but only one tensioning mechanism is applied in the operation, and the other tensioning mechanism is idle, and the equipment is operated by hands, so that the idle tensioning mechanism not only occupies the operation space, but also increases the load of arms when the medical personnel operate and increases the burden of the medical personnel;
3) referring to the patent document specifications [0065], [0066], [0067] and the drawings 23, 24 and 25 in the attached drawings, as the sleeve I (311) with the driving helical teeth (312) and the sleeve II (313) with the driven helical teeth (314) are adopted for transmission, the technical effect which is expected to be realized is that one-way transmission cannot be realized; in the process of tightening the steel wire, a doctor needs to try tightening force for multiple times before tying the steel wire head to enable the reduction of the bone gap to achieve the best effect, so that in the process of tightening the steel wire, if excessive tightening needs to be loosened, the equipment related in the patent cannot achieve the technical effect of loosening the steel wire, only the first hand-screwed bolt (214) or the second hand-screwed bolt (227) can be opened to loosen the compressed steel wire head, and after the initial state of the equipment is recovered, the compressed steel wire head is tightened again, so that the operation efficiency is seriously influenced, and secondary injury is also caused to the damaged patella;
4) because the driving helical gear (312) and the driven helical gear (314) are actually ratchet transmission structures, the number of teeth is certain, the minimum step number which can be realized by rotating a circle in the circumferential direction is also certain, and stepless transmission cannot be realized, so that the embarrassment condition that one step is too loose and the other step is too tight easily occurs in the operation, even if the number of teeth of the helical gear is increased, the degree of too loose or too tight can only be reduced, and the over-loose or too tight degree cannot be completely eliminated, moreover, the number of teeth is increased, the tooth shape is reduced, the material has stress limit, and the number of teeth of the helical gear cannot be infinitely increased;
5) reference is made to the technical features described in the above patent document descriptions in paragraphs [0065], [0066] and [0067 ]: there is no transmission structure capable of self-locking between the first transition gear (315) and the driving shaft 238, so that the technical effect "when the first driving helical tooth 312 rotates reversely, the first driving helical tooth 312 extrudes the second driven helical tooth 314 and the second sleeve 313 floats away from the
Disclosure of Invention
In order to solve the defects of the prior art, the invention aims to provide the medical handheld steel wire tightening base which is novel in structure, convenient to operate and high in modularization degree, can be quickly spliced by selecting appropriate modules according to the actual conditions of the operation, saves the operation time, reduces the operation cost and improves the operation quality.
The technical scheme adopted by the invention is as follows: the utility model provides a base is tightened up to medical hand-held type steel wire line, the following is called handheld base, including base, roof, lift axle, left pin, well pin, right pin, slip table spring, rack, crane, central bevel gear, left connecting rod, left gear train, left swinging member, left conical top, first spring, arc groove swinging plate, right conical top, right swinging member, right gear train, right connecting rod, slip table, parallel bar, trigger spring, trigger, right swinging spring, right rotating sleeve, left swinging spring, its characterized in that: the top plate and the base support the movement of the components, the central bevel gear and the top plate form a revolute pair, the lifting shaft and the central bevel gear are connected through splines to form a revolute pair, the left gear set and the right gear set can rotate and move up and down relative to the base, the left stop lever realizes the up-and-down movement and positioning of the left gear set through the left pendulum spring, the left cone top, the left swing piece and the left rotary sleeve, the right stop lever realizes the up-and-down movement and positioning of the right gear set through the right pendulum spring, the right cone top, the right swing piece and the right rotary sleeve, the middle stop lever realizes the up-and-down movement positioning of the lifting shaft through the first spring, the arc groove pendulum plate, the left connecting rod, the right connecting rod and the lifting frame, the reciprocating motion of the sliding table and the trigger realizes the reciprocating engagement and disengagement of the rack and the left gear set or the right gear set through the sliding table spring, the parallel rod and the trigger, the steel wire is tightened or loosened by the double-wire-end tightening mechanism or the single-wire-end tightening mechanism.
Further, the upper end of the base is a square cavity, the lower end of the base is provided with a handle, the two sides inside the square cavity are provided with a left support plate and a right support plate, the front end of the bottom of the square cavity is provided with a square cavity, the two sides of the cavity are provided with guide rail structures, a left gear set is arranged in a round hole at the end part of the left support plate and can rotate and move up and down relative to the left support plate, a right gear set is arranged in a round hole at the end part of the right support plate and can rotate and move up and down relative to the right support plate, a top plate is fixedly connected with the upper end of the base through screws, the upper side of the top plate is provided with four inserting columns, the top end of each inserting column is provided with an inclined plane, the middle position of the top plate is provided with a hook, a round hole for a, the upper end and the lower end of the lifting shaft are both of an external spline structure, the lifting shaft can rotate and move up and down in a round hole of the top plate close to the middle position, an external spline at the lower end of the lifting shaft is matched with an internal spline at the upper end of the central bevel gear to be installed, the lifting shaft can move up and down in the internal spline and cannot be separated from the internal spline, and the round hole and the lifting shaft are coaxially installed and can drive the lifting shaft to move up and down.
Furthermore, an upper bevel gear structure and a lower bevel gear structure are arranged on the left gear set, a left rotating sleeve is arranged at the top end of the left gear set, the left rotating sleeve and the left gear set form a rotating pair and can drive the left gear set to move up and down, the left end of the left swinging piece is of a planar structure, a long groove opening is formed in the right end of the left swinging piece, a rotating pair is formed by the middle position of a left stop lever and the top plate, the rotating axis and the rotating axis of the left swinging piece are at the same horizontal height, the left end of the left stop lever is of a plate-shaped structure convenient to pull up and down, a left swinging spring and a left cone top are arranged in a round hole in the right end, the left swinging spring is always in a compressed state, and the cone tip at the right end of the left cone top tightly pushes up the planar structure at the left end of the left swinging piece and can slide on the planar; the right gear set is provided with an upper bevel gear structure and a lower bevel gear structure, the right rotating sleeve is installed at the top end of the right gear set, the right rotating sleeve and the right gear set form a rotating pair, the right gear set can be driven to move up and down, the left end of the right swinging piece is of a planar structure, the right end of the right swinging piece is provided with a long groove opening, the middle position of the right rotating sleeve and the top plate form a rotating pair, the rotating axis of the right swinging piece and the rotating axis of the right swinging piece are at the same horizontal height, the left end of the right blocking piece is of a plate-shaped structure convenient to pull up and down, a right swinging spring and a right cone top are installed in a round hole of the right end, the right swinging spring is always in a compressed state, and the cone tip at the right end of the right cone top tightly pushes up the planar structure at the left end of the right swinging piece and can.
In the initial state, the left stop lever is in an upward pulling state, the left swing spring pushes the right end of the left conical top to tightly prop against the lower edge of the left end planar structure of the left swing piece, and due to the lever action, the long groove opening at the right end of the left swing piece lifts the left rotating sleeve to a high position, so that the left gear set moves upwards to the high position, and the upper bevel gear structure of the left gear set is disengaged from the central bevel gear; the right stop lever is in an upward pulling state, the right swing spring pushes the right end of the right cone top to tightly prop against the lower edge of the left end planar structure of the right swing piece, and due to the lever action, the long groove opening at the right end of the right swing piece lifts the right rotating sleeve to a high position, so that the right gear set moves upwards to the high position, and the upper bevel gear structure of the right gear set is disengaged from the central bevel gear; namely, in the initial state, the left stop lever and the right stop lever are both in an upward pulling state, and the left gear set and the right gear set are both in a high position disengaged from the central bevel gear.
When the left stop lever is pulled anticlockwise downwards, the left swing spring pushes the right end of the left conical top to slide from the lower edge to the upper edge of the left end plane structure of the left swing piece, in the process, the left swing spring is compressed and then extends, the left swing piece rotates clockwise, so that the left gear set moves downwards to a low position, and the upper bevel gear structure of the left gear set is meshed with the central bevel gear; when the left stop lever is pulled upwards clockwise, the left gear set moves upwards to a high position and is disengaged from the central bevel gear.
When the right stop lever is pulled downwards anticlockwise, the right swing spring pushes the right end of the right conical top to slide from the lower edge to the upper edge of the left end plane structure of the right swing piece, in the process, the right swing spring is compressed and then extends, the right swing piece rotates clockwise, the right gear set moves downwards to a low position, and the upper bevel gear structure of the right gear set is meshed with the central bevel gear; when the right stop lever is pulled clockwise upwards, the right gear set moves upwards to a high position and is disengaged from the central bevel gear.
Further, the left ends of the left connecting rod and the right connecting rod and the top plate form a coaxial revolute pair, the right ends are provided with strip-shaped empty grooves, extension shafts arranged at the two ends of the lifting frame respectively slide in the strip-shaped empty grooves at the right ends of the left connecting rod and the right connecting rod, the middle position of the arc groove swinging plate and the top plate form a revolute pair, the rotation axis of the revolute pair is coaxial with the rotation axis of the left connecting rod and the right connecting rod, the left end of the arc groove swinging plate is provided with a cross rod, the right end of the arc groove swinging plate is provided with an arc-shaped empty groove, the extension shafts arranged at the middle positions of the left connecting rod and the right connecting rod towards the outside slide in the arc-shaped empty groove at the right end of the arc groove swinging plate, the middle position of the middle blocking rod and the base form a revolute pair, the left end of the middle blocking rod is of a plate-shaped structure which is convenient to pull up and down, the right end of the, and the axle center of the right end mounting position of the middle stop lever and the rotation axle center of the middle stop lever are at the same horizontal height.
During initial state, well pin is the state of wrenching downwards, and the horizontal pole of the taut arc groove swing board left end of first spring makes it have clockwise rotation's trend, and the upper end of the circular arc dead slot of arc groove swing board right-hand member pushes up the projecting shaft of left connecting rod and right connecting rod downwards, makes both back have clockwise rotation's trend, and the crane drives the lift axle at this moment and is in the low level.
The middle stop lever is pulled upwards clockwise, in the process, the first spring is firstly extended and then shortened, the arc groove swinging plate rotates anticlockwise, the lower end of the arc empty groove at the right end of the arc groove swinging plate upwards props against the extension shafts of the left connecting rod and the right connecting rod, the left connecting rod and the right connecting rod rotate anticlockwise, the lifting frame drives the lifting shaft to move upwards to a high position, and the lifting shaft is extended upwards; and when the middle stop lever is pulled downwards anticlockwise, the lifting frame drives the lifting shaft to move downwards to a low position, so that the lifting shaft retracts downwards.
Further, the slip table is installed in the square dead slot of base square cavity bottom front end, constitute and remove vice, be equipped with the slip table spring between slip table top and the base square cavity front side, the slip table lower extreme indicates the spanner in being equipped with, rack rear end both sides are equipped with left taper rack and right taper rack, the parallel bar all constitutes the revolute pair with rack and slip table, the trigger upper end all constitutes the revolute pair with rack and slip table, the rack, the slip table, the parallel bar, the trigger constitutes the parallelogram structure, be equipped with the trigger spring between parallel bar intermediate position and the slip table lower extreme, the trigger spring is in all the time by tensile state.
During initial state, under the shrink pulling force effect of slip table spring, the slip table is located the square cavity front end of base, under trigger spring's shrink pulling force effect, and the trigger is in the state of stretching out forward, and the rack is in the low level.
If the central bevel gear needs to rotate clockwise, the left stop lever is pulled upwards to enable the left gear set to be at a high position and to be disengaged from the central bevel gear, the right stop lever is pulled downwards to enable the right gear set to be at a low position, and an upper bevel gear structure of the right gear set is engaged with the central bevel gear; the palm holds the handle, so that the thumb, the ring finger and the little finger hold the handle, the middle finger hooks the middle finger wrench, and the index finger hooks the trigger; firstly, the forefinger pulls the trigger backwards to enable the trigger to rotate clockwise, due to the structural characteristics of the parallelogram, the rack moves upwards to the height meshed with the lower bevel gear structure of the right gear set, then the forefinger and the middle finger pull the middle finger wrench and the trigger backwards together to enable the rack to be kept at a high position and move backwards, the right bevel rack is meshed with the lower bevel gear structure of the right gear set, and the right gear set rotates anticlockwise, so that the clockwise rotation of the central bevel gear is realized; when the sliding table moves to the rearmost end of the square empty groove of the base, the forefinger loosens the trigger first to enable the sliding table to rotate forwards, the rack descends to a low position under the action of the spring tension of the trigger and is disengaged from the lower bevel gear structure of the right gear set, then the middle finger wrench is loosened forwards, and the sliding table moves forwards to an initial position under the action of the spring tension of the sliding table; the steps are repeated to realize the clockwise continuous rotation of the central bevel gear.
If the central bevel gear needs to rotate anticlockwise, the left stop lever is pulled downwards to enable the left gear set to be at a low position, the upper bevel gear structure of the left gear set is meshed with the central bevel gear, and the right stop lever is pulled upwards to enable the right gear set to be at a high position and separated from the meshing with the central bevel gear; the palm holds the handle, so that the thumb, the ring finger and the little finger hold the handle, the middle finger hooks the middle finger wrench, and the index finger hooks the trigger; firstly, the forefinger pulls the trigger backwards to enable the trigger to rotate clockwise, due to the structural characteristics of the parallelogram, the rack moves upwards to the height meshed with the lower bevel gear structure of the left gear set, then the forefinger and the middle finger pull the middle finger wrench and the trigger backwards together to enable the rack to be kept at the high position and move backwards, the left bevel rack is meshed with the lower bevel gear structure of the left gear set, and the left gear set rotates clockwise, so that the counterclockwise rotation of the central bevel gear is realized; when the sliding table moves to the rearmost end of the square empty groove of the base, the forefinger loosens the trigger first to enable the sliding table to rotate forwards, the rack descends to a low position under the action of the spring tension of the trigger and is disengaged from the lower bevel gear structure of the right gear set, then the middle finger wrench is loosened forwards, and the sliding table moves forwards to an initial position under the action of the spring tension of the sliding table; the steps are repeated to realize the anticlockwise continuous rotation of the central bevel gear.
The invention has the beneficial effects that:
the invention relates to a medical handheld steel wire tightening base which has two driving modes in the process of tightening a steel wire, wherein one mode is a single-hand operation mode of pulling a middle finger wrench and a trigger in a reciprocating manner; the other is a two-hand operation mode that one hand holds the handle and the other hand rotates the fifth hand wheel or the sixth hand wheel; the two driving modes can be switched randomly according to the actual conditions of the operation and the use habits of medical staff, and the convenience of using the equipment is improved.
Secondly, a modular connecting structure is adopted between the handheld base and the connecting mechanism, so that quick connection and disconnection can be realized, a large amount of operation time can be saved by modular quick assembly and disassembly, and the operation efficiency and the operation quality are improved;
in the equipment for tightening the steel wire in the traditional technology, the ratchet structure is mostly adopted to realize the one-way transmission of power, so that the conditions of less and more over-loosening and over-tightening are easy to occur in the process of tightening the steel wire, and the technical effect of slowly loosening the steel wire under the condition of over-tightening the steel wire is not easy to realize; the trigger, the sliding table, the rack, the central bevel gear, the left gear set and the right gear set in the application of the invention are combined with the transmission mechanism which is formed by the worm gear structure adopted by the double-thread tightening mechanism and the single-thread tightening mechanism in the power transmission process, so that the transmission mechanism not only has a self-locking function and prevents the reverse transmission of power, but also has a large transmission ratio, the tightening force can be steplessly adjusted, and the tightening and the loosening of steel wires can be realized by the positive and negative rotation of the worm.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic structural diagram of a handheld base.
Fig. 3 is a schematic cross-sectional view of the handheld base.
Fig. 4 is a schematic cross-sectional view of the handheld base.
Fig. 5 is a partial sectional view of the hand-held base after the middle stop lever is pulled downward and upward.
Fig. 6 is a schematic diagram illustrating a process of driving the central bevel gear to rotate clockwise.
Fig. 7 is an exploded view of the hand-held base.
Fig. 8 is a schematic structural view of the connection mechanism.
Fig. 9 is an exploded view of the attachment mechanism.
Fig. 10 is a schematic view of a partial cross-sectional structure of the connection mechanism being connected and disconnected with the top plate and the double-thread-head frame.
Fig. 11 is a schematic structural view of a double-thread-head tightening mechanism.
Fig. 12 is a schematic cross-sectional view of a double thread take-up mechanism.
Fig. 13 is a schematic longitudinal sectional view of the double wire head tightening mechanism.
Fig. 14 is an exploded view of the dual thread take-up mechanism.
Fig. 15 is a schematic structural diagram of a double-lead frame.
Fig. 16 is a partial sectional view schematically showing the structure of the first reel.
Fig. 17 is a schematic view of the double-end wire take-up mechanism taking up the double-end wire.
Fig. 18 is a partial cross-sectional schematic view of a single-lead take-up mechanism.
FIG. 19 is a schematic view of a single thread take-up mechanism taking up a single thread of wire.
Reference numerals: 1 hand-held base, 101 base, 101.1 handle, 101.2 right support plate, 101.3 left support plate, 102 top plate, 102.1 plug-in column, 102.2 bevel gear rack, 103 lifting shaft, 104 left stop lever, 105 middle stop lever, 106 right stop lever, 107 sliding table spring, 108 rack, 108.1 right bevel rack, 108.2 left bevel rack, 109 lifting frame, 110 central bevel gear, 111 left connecting rod, 112 left gear set, 113 left swinging piece, 114 left bevel top, 115 first spring, 116 arc groove swinging plate, 117 right bevel top, 118 right swinging piece, 119 right gear set, 120 right connecting rod, 121 sliding table, 121.1 middle finger, 122 parallel rod, 123 trigger spring, 124 trigger, 125 right swinging spring, 126 right rotating sleeve, 127 left rotating sleeve, 128 left swinging spring;
2, a connecting mechanism, a 201 main body frame, 201.1 jacks, a 202 bottom plate, a 203 clamping plate, 204 set screws, 205 buttons, 206 second springs, 207 third springs and 208 hooks;
3 double-thread-end tightening mechanism, 301 double-thread-end frame, 301.1 spile, 302 fifth hand wheel, 303 first wrench, 304 first reel, 305 first locking knob, 306 left guide wheel, 307 left connecting rod, 308 sliding groove component, 309 screw rod, 310 left connecting rod, 311 left long rod, 312 left guide wheel, 313 left three guide wheel, 314 right three guide wheel, 315 right two guide wheel, 316 right long rod, 317 right connecting rod, 318 right connecting rod, 319 right guide wheel, 320 second locking knob, 321 second reel, 322 second wrench, 323 first bevel gear set, 324 right end cap, 325 second worm gear, 326 first planetary bevel gear, 327 left end cap, 328 second bevel gear set, 329 second planetary bevel gear;
4 single-thread-end tightening mechanism, 401 single-thread-end rack, 402 sixth hand wheel, 403 third winding drum, 404 third wrench, 405 worm gear set;
5 single thread steel wire, 6 double thread steel wire, 6.1 left thread end and 6.2 right thread end.
Detailed Description
The present invention will be further described with reference to specific examples, which are illustrative of the invention and are not to be construed as limiting the invention.
As shown in fig. 1 and 2, a medical handheld steel wire tightening base comprises a
As shown in fig. 3, 4 and 7, the medical handheld wire tightening base is characterized in that: the
As shown in fig. 3, 4 and 5, the upper end of the
As shown in fig. 3, 4 and 6, the
in an initial state, the
when the
when the
As shown in fig. 5, the left ends of the left connecting rod 111 and the right connecting rod 120 and the top plate 102 form a coaxial revolute pair, the right ends are provided with long hollow grooves, the extending shafts arranged at the two ends of the lifting frame 109 respectively slide in the long hollow grooves at the right ends of the left connecting rod 111 and the right connecting rod 120, the middle position of the arc groove swinging plate 116 and the top plate 102 form a revolute pair, the rotation axis of the revolute pair is coaxial with the rotation axis of the left connecting rod 111 and the right connecting rod 120, the left end of the arc groove swinging plate 116 is provided with a cross rod, the right end of the arc groove swinging plate 116 is provided with an arc hollow groove, the extending shaft arranged at the outer side of the middle position of the left connecting rod 111 and the right connecting rod 120 slides in the arc hollow groove at the right end of the arc groove swinging plate 116, the middle position of the middle blocking rod 105 and the base 101 form a revolute pair, the left end of the middle blocking rod 105 is of a plate-shaped structure convenient for pulling up and down, the right end is, the first spring 115 is always in a stretched state, and the axis of the right end mounting position thereof and the rotation axis of the middle stop lever 105 are at the same horizontal height;
in an initial state, the
the
As shown in fig. 5 and 6, the sliding table 121 is installed in a square hollow groove at the front end of the bottom of the square cavity of the base 101 to form a sliding pair, a sliding
in an initial state, under the action of the contraction and pulling force of a sliding
if the central bevel gear 110 needs to rotate clockwise, the left stop lever 104 is pulled upwards to enable the left gear set 112 to be in a high position and to be disengaged from the central bevel gear 110, the right stop lever 106 is pulled downwards to enable the right gear set 119 to be in a low position, and the upper bevel gear structure of the right gear set 119 is engaged with the central bevel gear 110; the palm holds the handle, so that the thumb, the ring finger and the little finger hold the handle, the middle finger hooks the middle finger wrench 121.1, and the forefinger hooks the trigger 124; firstly, the forefinger pulls the trigger 124 backwards to enable the trigger 124 to rotate clockwise, due to the structural characteristics of the parallelogram, the rack 108 moves upwards to the height meshed with the lower bevel gear structure of the right gear set 119, then the forefinger and the middle finger pull the middle finger wrench 121.1 and the trigger 124 backwards together to enable the rack 108 to be kept at the high position and move backwards, the right bevel rack 108.1 is meshed with the lower bevel gear structure of the right gear set 119, and the right gear set 119 rotates anticlockwise, so that the clockwise rotation of the central bevel gear 110 is realized; when the sliding table 121 moves to the rearmost end of the square empty groove of the base 101, the forefinger firstly loosens the trigger 124 to enable the sliding table to rotate forwards, the rack 108 descends to the low position under the action of the tensile force of the trigger spring 123 and is disengaged from the bevel gear structure below the right gear set 119, then the middle finger wrench 121.1 is loosened forwards, and the sliding table 121 moves forwards to the initial position under the action of the tensile force of the sliding table spring 107; the clockwise continuous rotation of the central bevel gear 110 can be realized by repeating the above steps;
if the central bevel gear 110 needs to rotate anticlockwise, the left stop lever 104 is pulled downwards to enable the left gear set 112 to be at a low position, the upper bevel gear structure of the left gear set 112 is meshed with the central bevel gear 110, and the right stop lever 106 is pulled upwards to enable the right gear set 119 to be at a high position and to be disengaged from the central bevel gear 110; the palm holds the handle, so that the thumb, the ring finger and the little finger hold the handle, the middle finger hooks the middle finger wrench 121.1, and the forefinger hooks the trigger 124; firstly, the forefinger pulls the trigger 124 backwards to enable the trigger 124 to rotate clockwise, the rack 108 moves upwards to the height meshed with the lower bevel gear structure of the left gear set 112 due to the structural characteristic of the parallelogram, then the forefinger and the middle finger pull the middle finger wrench 121.1 and the trigger 124 backwards together to enable the rack 108 to be kept at the high position and move backwards, the left bevel rack 108.2 is meshed with the lower bevel gear structure of the left gear set 112, and the left gear set 112 rotates clockwise, so that the counterclockwise rotation of the central bevel gear 110 is realized; when the sliding table 121 moves to the rearmost end of the square empty groove of the base 101, the forefinger firstly loosens the trigger 124 to enable the sliding table to rotate forwards, the rack 108 descends to the low position under the action of the tensile force of the trigger spring 123 and is disengaged from the bevel gear structure below the right gear set 119, then the middle finger wrench 121.1 is loosened forwards, and the sliding table 121 moves forwards to the initial position under the action of the tensile force of the sliding table spring 107; the counter-clockwise continuous rotation of the central bevel gear 110 can be realized by repeating the above steps;
as shown in fig. 8 and 9, the connecting mechanism 2 includes a main body frame 201, a bottom plate 202, a clamping plate 203, a set screw 204, a button 205, a second spring 206, a third spring 207, and a hook 208, wherein a rectangular groove is provided on the upper side of the front end of the main body frame 201, two rectangular insertion holes 201.1 are provided on the front end of the rectangular groove, a through hole is provided near the middle position of the rectangular groove, a hook cavity and a button hole in the vertical direction are provided inside the rear end of the main body frame 201, the hook 208 is installed in the hook cavity and can slide back and forth in the hook cavity, an inclined plane structure is provided on the front end of the hook 208, a rectangular opening is provided on the middle position, an inclined plane is provided on the rear side of the button 205, the button 205 passes through the rectangular opening in the middle of the hook 208 and is installed in the button hole of the main body frame 201, two threaded holes communicated with the hook cavity, two third springs 207 set up respectively between two holding screw 204 and couple 208, main part frame 201 downside is equipped with the cardboard cavity, cardboard 203 is installed in the cardboard cavity, and can be in the cardboard cavity back-and-forth movement, be equipped with four horseshoe trompils on the cardboard, cardboard 203 rear end is equipped with a pressure board, the intermediate position is equipped with the rectangle trompil, be provided with a second spring 206 between cardboard 203 front end position and the main part frame 201, be equipped with four round holes that are used for inserting peg post 102.1 on the bottom plate 202, bottom plate 202 installs in main part frame 201 downside, and realize fastening connection between them through the screw, round hole coaxial center position is equipped with the through-hole in the middle of the rectangular recess with main part frame 201 in the middle of bottom.
As shown in fig. 10, in the initial state, under the action of the elastic force of the
As shown in fig. 10, under the action of the elastic force of the
The
As shown in fig. 11, 12, 13, 14, and 15, the double wire-head tightening mechanism 3 includes a double wire-head frame 301, a fifth hand wheel 302, a first wrench 303, a first reel 304, a first locking knob 305, a left guide wheel 306, a left connecting rod 307, a chute member 308, a screw 309, a left connecting rod 310, a left long rod 311, a left guide wheel 312, a left guide wheel 313, a right guide wheel 314, a right guide wheel 315, a right long rod 316, a right connecting rod 317, a right connecting rod 318, a right guide wheel 319, a second locking knob 320, a second reel 321, a second wrench 322, a first bevel gear set 323, a right end cover 324, a second worm wheel 325, a first planetary bevel gear 326, a left end cover 327, a second bevel gear set 328, a second planetary bevel gear 329, a left connecting rod 307, a left connecting rod 310, and a left long rod 311, wherein the double wire-head tightening mechanism 3 includes a double wire-head frame 301, a fifth hand wheel 302, a first wrench 303, a first reel 304, a first locking, The right two connecting rods 317 and the right long rod 316 are arranged at the right front end of the double-thread end rack 301 and form a trapezoid, the sliding groove member 308 and the screw 309 are arranged at the middle position of the front end of the double-thread end rack 301, for adjusting the opening position of the left long rod 311 and the right long rod 316, the first wrench 303, the first winding drum 304 and the first locking knob 305 are arranged at the left side of the double-thread-head rack 301, used for tightening the left wire end 6.1 or a first steel wire, a second locking knob 320, a second winding drum 321 and a second wrench 322 are arranged at the right side of the double-wire-end rack 301, the fifth hand wheel 302 is used for tightening the right thread head 6.2 or the second steel wire, and the fifth hand wheel drives the first winding drum 304 and the second winding drum 321 to rotate through a transmission structure consisting of a first bevel gear group 323, a right end cover 324, a second worm gear 325, a first planetary bevel gear 326, a left end cover 327, a second bevel gear group 328 and a second planetary bevel gear 329, so that tightening and loosening of the steel wire led out by the double thread head or the steel wire led out by the two single thread heads are realized.
The two sides of the front end of the double-line-head rack 301 are respectively provided with an extending arm, the rear end of the double-line-head rack 301 is of a double-layer structure formed by an upper plate and a lower plate, the middle position of the upper plate of the double-line-head rack 301 is provided with a threaded hole, the lower plate is of a rectangular structure with the same size as the rectangular groove on the upper side of the front end of the main body frame 201, the front end of the lower plate is provided with two plug plates 301.1, the rear ends of the upper plate and the lower plate are provided with coaxial and through round holes, the upper end of a fifth hand wheel 302 is of a hand wheel structure which can be operated by hands and is convenient to rotate, the middle part of the fifth hand wheel is of a worm structure, the lower end of the fifth hand wheel 302 is arranged in the round holes on the rear ends of the upper plate and the lower plate of the double-line-head rack 301, the second worm wheel 325 is arranged between the upper plate, the right end cover 324 is fastened and connected with the right end of the second worm gear 325 through a screw, the left end cover 327 is fastened and connected with the left end of the second worm gear 325 through a screw, the first bevel gear set 323 and the right end cover 324 form a rotating pair, both ends of the first bevel gear set 323 are provided with bevel gear structures, the bevel gear structure at the left end is simultaneously meshed with the first planetary bevel gear 326 and the second planetary bevel gear 329, the second bevel gear set 328 and the left end cover 327 form a rotating pair, both ends of the second bevel gear set 328 are provided with bevel gear structures, and the bevel gear structure at the right end is simultaneously meshed with the first planetary bevel gear 326 and the second planetary bevel gear 329.
As shown in fig. 16 and 17, a variable diameter groove is formed in a cylindrical side surface of the first reel 304, so that a left thread end 6.1 penetrating therethrough is excessively smooth, the width of the variable diameter groove can only accommodate a single steel wire to penetrate therethrough, a first wrench 303 is installed at a position close to the bottom end of the variable diameter groove, an eccentric wheel structure is arranged at the lower end of the first wrench 303, after the left thread end 6.1 penetrates into the variable diameter groove and passes through a gap between the eccentric wheel and the variable diameter groove, the first wrench 303 is pulled counterclockwise, so that the eccentric wheel structure can be pressed against the left thread end 6.1, a threaded hole is formed in the first reel 304, a first locking knob 305 and the threaded hole form a thread pair, the first reel 304 is installed at the left side of the double thread end rack 301, both form a rotation pair, a bevel gear structure is arranged at the lower end of the first reel 304, and the bevel gear structure is engaged with a bevel; a variable diameter groove is arranged in the cylindrical side surface of the second winding drum 321, a right thread end 6.2 which penetrates into the variable diameter groove is excessively smooth, the width of the variable diameter groove can only accommodate a single steel wire to penetrate into the variable diameter groove, a second wrench 322 is arranged at a position close to the bottom end of the variable diameter groove, an eccentric wheel structure is arranged at the lower end of the second wrench 322, after the right thread end 6.2 penetrates into the variable diameter groove and passes through a gap between the eccentric wheel and the variable diameter groove, the second wrench 322 is pulled clockwise, the eccentric wheel structure can be tightly pressed against the right thread end 6.2, a threaded hole is arranged in the second winding drum 321, the threaded hole of the second locking knob 320 forms a thread pair, the second winding drum 321 is arranged on the right side of the double-thread-end frame 301, the second winding drum 321 and the double-thread-end frame constitute a rotating pair, a bevel gear structure.
As shown in fig. 11 and 13, the front end of the
As shown in fig. 11, one end of the
As shown in fig. 11, one end of the
As shown in fig. 11 and 17, the length of the
As shown in fig. 11 and 17, in an initial state, the
As shown in fig. 18 and 19, the single-thread-head tightening mechanism 4 includes a single-thread-
As shown in fig. 18 and 19, a variable diameter groove is formed in a cylindrical side surface of the third winding
The embodiment of the invention comprises the following steps:
1) as shown in fig. 1, the
one-handed operation mode: as shown in fig. 5, taking the double-wire-head tensioning mechanism 3 as an example, after the handheld base 1 is spliced with the double-wire-head tensioning mechanism 3 through the connecting mechanism 2, the middle stop lever 105 is pulled upwards to extend the lifting shaft 103 upwards, and the external spline at the upper end of the lifting shaft 103 passes through the connecting mechanism 2 to be meshed with the internal spline at the lower end of the fifth hand wheel 302; the left stop lever 104 is pulled upwards to enable the left gear set 112 to be disengaged from the central bevel gear 110, the right stop lever 106 is pulled downwards to enable the upper bevel gear structure of the right gear set 119 to be engaged with the central bevel gear 110, the middle wrench and the trigger are pulled in a reciprocating manner to enable the right bevel rack 108.1 to continuously push the right gear set 119 to rotate anticlockwise, so that the central bevel gear 110 rotates clockwise, the central bevel gear 110 drives the fifth hand wheel 302 to rotate clockwise through the lifting shaft 103, and therefore the double-end steel wire 6 or the two single-end steel wires can be tightened; the middle stop lever 105 is pulled upwards, the left stop lever 104 is pulled downwards, the upper bevel gear structure of the left gear set 112 is meshed with the central bevel gear 110, the right stop lever 106 is pulled upwards, the right gear set 119 is disengaged from the central bevel gear 110, the middle wrench and the trigger are pulled in a reciprocating manner, the left bevel rack 108.2 continuously pushes the left gear set 112 to rotate clockwise, the central bevel gear 110 rotates anticlockwise, the central bevel gear 110 drives the fifth hand wheel 302 to rotate anticlockwise through the lifting shaft 103, and accordingly double-end steel wires 6 or two single-end steel wires are loosened;
two-hand operation mode: as shown in fig. 5, taking the double-thread tensioning mechanism 3 as an example, after the
2) As shown in fig. 10, when the
As shown in fig. 10, when the dual-stub tightening mechanism 3 needs to be connected to the connecting mechanism 2, first, the two insertion plates 301.1 at the front end of the lower plate of the dual-stub frame 301 are correspondingly inserted into the two rectangular insertion holes 201.1 at the front end of the rectangular groove on the upper side of the main frame 201, and then the rear end of the dual-stub frame 301 is pressed downward, so that the rear end of the lower plate of the dual-stub frame 301 is pressed into the lower part of the inclined plane structure at the front end of the hook 208, and then the rapid connection between the dual-stub tightening mechanism 3 and the connecting mechanism 2 is completed; when the double-thread-end tightening mechanism 3 needs to be disconnected with the connecting mechanism 2, the button 205 is pressed downwards at first to enable the inclined plane structure at the front end of the hook 208 to retract into the hook cavity, then the rear end of the double-thread-end rack 301 is lifted upwards and the inserting plate 301.1 is pulled out of the inserting hole 201.1, and then the double-thread-end tightening mechanism 3 and the connecting mechanism 2 can be quickly disconnected; the manner and method of connecting and disconnecting the single thread take-up mechanism 4 to the connecting mechanism 2 is the same as the manner and method of connecting and disconnecting the double thread take-up mechanism 3 to the connecting mechanism 2.
3) As shown in fig. 11, 16, and 17, the double-thread tightening mechanism 3 can tighten the wire drawn from the double-thread wire and the wire drawn from the two single-thread wires.
Firstly, when the double-end steel wire 6 needs to be tightened, the screw 309 is screwed out from the threaded hole in the middle of the upper plate of the double-end machine frame 301, the screw 309 drives the sliding groove piece 308 to move forwards, meanwhile, the front ends of the left long rod 311 and the right long rod 316 are opened, and the screw 309 stops rotating after the left three guide wheels 313 and the right three guide wheels 314 reach a proper distance; then, the double-end steel wire 6 sequentially passes through the steel nails and is wound into a single ring shape, the left end 6.1 sequentially bypasses a left third guide wheel 313, a left second guide wheel 312 and a left first guide wheel 306, then penetrates into a variable-diameter groove arranged on the first reel 304 and passes through a gap between the eccentric wheel structure of the first wrench 303 and the variable-diameter groove, and then the first wrench 303 is pulled anticlockwise, so that the eccentric wheel structure of the first wrench 303 tightly presses the left end 6.1; the right thread end 6.2 sequentially bypasses the right three guide wheel 314, the right two guide wheel 315 and the right one guide wheel 319, penetrates into a diameter-variable groove arranged on the second winding drum 321, passes through a gap between the eccentric wheel structure of the second wrench 322 and the diameter-variable groove, and then is pulled clockwise by the second wrench 322, so that the eccentric wheel structure of the second wrench 322 compresses the right thread end 6.2;
the first locking knob 305 and the second locking knob 320 are rotated counterclockwise to move upwards without contacting with the upper plate of the dual-thread-head rack 301, then the fifth hand wheel 302 is rotated clockwise, the worm structure in the middle of the fifth hand wheel 302 transmits the torsion force to the second worm wheel 325, the second worm wheel 325 is rotated clockwise, the first planetary bevel gear 326 and the second planetary bevel gear 329 revolve around the axis of the second worm wheel 325 along with the second worm wheel 325, the left end bevel gear structure of the first bevel gear set 323 and the right end bevel gear structure of the second bevel gear set 328 engaged with the first planetary bevel gear 326 and the second planetary bevel gear 329 rotate clockwise, the bevel gear structure at the right end of the first bevel gear set 323 transmits the torsion force to the second winding drum 321 through the bevel gear structure at the lower end of the second winding drum 321, the second winding drum 321 rotates clockwise, the right thread head 6.2 is tightened, and the left end bevel gear structure of the second bevel gear set 328 transmits the torsion force to the first winding drum 321 through the bevel gear structure at the lower end of the first winding A winding drum 304, which makes the first winding drum 304 rotate anticlockwise and tightens the left thread end 6.1; the left thread end 6.1 and the right thread end 6.2 can be simultaneously loosened by rotating the fifth hand wheel 302 anticlockwise, and the tightening force of the double-thread steel wire 6 is adjusted by appropriately changing the rotating direction of the fifth hand wheel 302, so that the doctor can find the best effect of resetting the bone gap.
Because the worm gear and worm transmission is adopted between the
Secondly, when the steel wire led out by two single-end wires needs to be tightened, the screw 309 is screwed out from the threaded hole in the middle of the upper plate of the double-end rack 301, the screw 309 drives the sliding groove piece 308 to move forwards, meanwhile, the front ends of the left long rod 311 and the right long rod 316 are opened, and the screw 309 stops rotating after the left three guide wheels 313 and the right three guide wheels 314 reach a proper distance; then, the first steel wire led out of the first steel wire passes through a variable-diameter groove arranged on the first winding drum 304 and passes through a gap between an eccentric wheel structure of the first wrench 303 and the variable-diameter groove by sequentially passing the first steel wire around a left third guide wheel 313, a left second guide wheel 312 and the left first guide wheel 306, and then the first wrench 303 is pulled anticlockwise to enable the eccentric wheel structure of the first wrench 303 to tightly press the first steel wire; the second wire drawn out of the third guide wheel sequentially bypasses the third right guide wheel 314, the second right guide wheel 315 and the first right guide wheel 319, penetrates into a diameter-variable groove arranged on the second winding drum 321, and is pulled clockwise by the second wrench 322 after passing through a gap between the eccentric wheel structure of the second wrench 322 and the diameter-variable groove, so that the eccentric wheel structure of the second wrench 322 compresses the second wire.
If the first steel wire is to be individually tightened, the first locking knob 305 is first rotated counterclockwise to move upward without contacting the upper plate of the twin-wire frame 301, the second locking knob 320 is then rotated clockwise to move downward and push against the upper plate of the twin-wire frame 301, and the rotation of the second reel 321 is locked, the rotation of the first bevel gear set 323 is also locked, and then the fifth hand wheel 302 is rotated clockwise to rotate the second worm gear 325 clockwise, since the first bevel gear set 323 cannot rotate and the bevel gear structure at the left end cannot rotate, the first and second planetary bevel gears 326 and 329 revolve around their axes along with the second worm gear 325, and also rotate around their axes, and the bevel gear structure at the right end of the gear set 328 engaged with the first and second planetary bevel gears 326 and 329 rotates clockwise, after the meshing transmission of the bevel gear structure at the left end of the second bevel gear set 328 and the bevel gear structure at the lower end of the first reel 304, the first reel 304 rotates anticlockwise, and the first steel wire is tightened; turning the fifth handwheel 302 counterclockwise allows for independent loosening of the first wire.
If the second steel wire needs to be separately tightened, the second locking knob 320 is firstly rotated counterclockwise to move upward without contacting with the upper plate of the double-end frame 301, then the first locking knob 305 is rotated clockwise to move downward and push against the upper plate of the double-end frame 301, and the rotation of the first winding drum 304 is locked, the rotation of the second bevel gear set 328 is also locked, then the fifth hand wheel 302 is rotated clockwise to rotate the second worm gear 325 clockwise, because the second bevel gear set 328 cannot rotate and the bevel gear structure at the right end cannot rotate, the first and second planetary bevel gears 326 and 329 revolve around the axes thereof along with the second worm gear 325, and simultaneously rotate around the axes thereof, and the bevel gear structure at the left end of the first bevel gear set 323 meshed with the first and second planetary bevel gears 326 and 329 rotates clockwise, after the meshing transmission of the bevel gear structure at the right end of the first bevel gear group 323 and the bevel gear structure at the lower end of the second winding drum 321 is carried out, the second winding drum 321 rotates clockwise, and the second steel wire is tightened; turning the fifth handwheel 302 counterclockwise effects a separate release of the second wire.
4) As shown in fig. 18 and 19, when the single-
5) When the steel wire needs to be tightened in the operation, firstly, the double-wire-head tightening mechanism 3 or the single-wire-head tightening mechanism 4 is selected according to the number and the type of the led-out steel wire, and is installed on the connecting
The references to "front", "back", "left", "right", etc., are to be construed as references to orientations or positional relationships based on the orientation or positional relationship shown in the drawings or as orientations and positional relationships conventionally found in use of the product of the present invention, and are intended to facilitate the description of the invention and to simplify the description, but do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be construed as limiting the invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
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