CN209847356U - Full-power screw system and thread sleeve screwdriver used for same - Google Patents
Full-power screw system and thread sleeve screwdriver used for same Download PDFInfo
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- CN209847356U CN209847356U CN201920337202.3U CN201920337202U CN209847356U CN 209847356 U CN209847356 U CN 209847356U CN 201920337202 U CN201920337202 U CN 201920337202U CN 209847356 U CN209847356 U CN 209847356U
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Abstract
The utility model relates to a full power screw system and be used for full power screw system's thread bush screwdriver belongs to medical auxiliary instrument technical field. The screw comprises a screw head in an inverted frustum shape, a screw fixing groove is formed in the top end face of the screw head, a screw rod is arranged at the bottom end of the screw head, trapezoidal threads are arranged on the side face of the screw head, and fastening external threads are arranged on the side face of the bottom end of the screw rod; the thread bush comprises a thread bush body, a thread bush fixing groove is formed in the top end of the thread bush body, thread bush external threads are arranged on the outer surface of the thread bush body, fastening internal threads are arranged on the side wall of the bottom of the inner cavity of the thread bush, and the fastening internal threads and the fastening external threads are matched. The utility model discloses can subduct the bad stress of metal coaptation board, reduce metal coaptation board fracture probability simultaneously, reduce the stress of metal coaptation board down and shelter from and promote fracture healing, can reduce fixed metal coaptation board fracture probability under the shearing force environment again, reduce the operation risk.
Description
Technical Field
The utility model relates to a full power screw system and be used for full power screw system's thread bush screwdriver belongs to medical auxiliary instrument technical field.
Background
When the continuity of the bone is interrupted due to cracks, crumbling or fracture of the bone caused by various reasons such as trauma, it is necessary to fix the bone with a metal bone plate to ensure that the bone grows in the correct alignment. After a skeleton is fixed by the metal bone fracture plate, partial patients can have bone healing obstacles under the locking metal bone fracture plate due to the stress shielding effect, and even the metal bone fracture plate is broken, particularly, the bone fracture plate is easy to break when the bone fracture is fixed in the environment with shearing stress. For such patients, secondary operations are required to replace endophytes to ensure normal growth and recovery of bones. However, the secondary operation not only causes pain and cost to the patient, but also increases the operation risk and the infection probability, and is not beneficial to the health.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a full power screw system can subdue the bad stress of metal coaptation board, reduces metal coaptation board fracture probability simultaneously, reduces the stress of metal coaptation board down and shelters from and promote union fracture, can reduce again and fix metal coaptation board fracture probability under the shearing force environment, reduces the operation risk.
The utility model aims at providing a screw sleeve screwdriver which is matched with a screw sleeve for use and is used for taking out or fixing the screw sleeve; the thread sleeve strength can be increased, the thread sleeve fixing groove is prevented from sliding or the thread sleeve is prevented from being broken, and the probability that the thread sleeve can not be taken out is reduced.
The utility model discloses a full power screw system, including screw and the thread bush of suit together, the screw includes the screwhead of inverted circular truncated cone shape, and screw fixed slot is seted up to screwhead top face, and the screwhead bottom is equipped with the screw pole, and the screwhead side is equipped with trapezoidal screw thread, and the side of screw pole bottom is equipped with the fastening external screw thread; the thread bush comprises a thread bush body, a thread bush fixing groove is formed in the top end of the thread bush body, thread bush external threads are arranged on the outer surface of the thread bush body, fastening internal threads are arranged on the side wall of the bottom of the inner cavity of the thread bush, and the fastening internal threads and the fastening external threads are matched.
According to different bones, a proper metal bone fracture plate is selected or customized, the metal bone fracture plate is placed on one side of the bone to be fixed, the bottom of a screw rod is connected with a threaded sleeve through a fastening external thread and a fastening internal thread to be integrated, the integrated threaded sleeve and a screw are screwed into the bone through the metal bone fracture plate, and a screw head is connected with the metal bone fracture plate through a trapezoidal thread. The metal bone fracture plate can provide stress support for bones, avoid bone dislocation, ensure correct positions and directions of growth and recovery of the bones and ensure that a human body can be recovered. A certain gap is reserved between the screw rod and the threaded sleeve, and the screw rod and the screw head can have a certain moving range in the threaded sleeve and can rock in the direction of 360 degrees; in addition, because the threaded sleeve and the screw rod are connected by threads instead of welding, the slight rotation between the threaded sleeve and the screw rod can offset the undesirable stress when the shear force is generated by torsion and the like. Therefore, the adverse stress of the metal bone fracture plate can be effectively reduced, the fracture probability of the metal bone fracture plate is reduced, the probability of secondary operation is reduced, and the operation risk is reduced.
The metal bone fracture plate has very high strength and limited strength, but the metal bone fracture plate can be broken sometimes due to repeated actions for countless times. Repeated research shows that the bones in different positions of the human body have different motion directions and different motion characteristics, and the metal bone fracture plate has high tensile strength and compressive strength, but the human body does rotational motion during motion, and the human bones are not standard geometric shapes but physiological curves of life under the elimination selection of 'survival of suitable persons' in nature. Therefore, firstly, the metal bone fracture plate is difficult to be completely matched with the bone; secondly, the bone does non-linear motion, namely the bone does torsional motion, when circular arc rotary motion, torsional force can be generated on the metal bone fracture plate, under the condition that the metal bone fracture plate and the bone are completely screwed and fixed, the torsional force is completely transmitted to the metal bone fracture plate through the bone motion, the metal bone fracture plate bears complete torsional force, and although the metal bone fracture plate has high compressive strength and tensile strength, the metal bone fracture plate has low shear strength, so that after the shear force generated by the torsional force on the metal bone fracture plate exceeds the shear strength of the metal bone fracture plate, the metal bone fracture plate is broken.
For example, the upper arm of the upper limb can rotate, and the upper end of the upper arm is spherically connected with the shoulder; the small arm can do the turnover movement, and the thigh structure is not a straight line structure and has a certain radian from the root of the thigh to the knee.
The full-power screw system of the utility model has the advantages that the screw and the thread sleeve are mutually matched, the bottom of the screw and the thread sleeve are connected through the fastening thread, and the movable gap is reserved at the upper part of the screw and the thread sleeve, so that the relative thread sleeve of the screw shakes in the direction of 360 degrees; in addition, because the threaded sleeve and the screw rod are connected by threads instead of welding, the slight rotation between the threaded sleeve and the screw rod can offset the undesirable stress when the shear force is generated by torsion and the like. Therefore, when the bone and the metal bone fracture plate are fixed, the shearing force of the bone to the metal bone fracture plate can be reduced, and the fracture probability of the metal bone fracture plate is reduced.
The length of the screw rod is greater than the length of the inner cavity of the threaded sleeve. The screw rod is screwed up in to the thread bush, and a little is continuously screwed up to the screw rod, and screw rod and thread bush interference fit ensure that the screw rod screws up the degree more reliably with the thread bush.
The length of the fastening internal thread is less than that of the fastening external thread. When the screw rod is screwed into the threaded sleeve and interference fit between the screw rod and the threaded sleeve is realized, the screw rod and the threaded sleeve are always kept in a screwed state, and the screw rod and the threaded sleeve are reliably connected.
The length of the fastening internal thread is 1/5-1/10 of the length of the inner cavity of the thread bush. The screw is connected with the threaded sleeve only at the bottom, and a gap is reserved between the screw rod and the other parts of the inner cavity of the threaded sleeve for the relative threaded sleeve of the screw rod to rock and reduce the stress of the metal bone fracture plate, so that the fracture of the metal bone fracture plate caused by stress shielding can be avoided, and the fracture of the metal bone fracture plate caused by torsional stress can be reduced.
And a fastening boss is arranged above the fastening external thread of the screw rod. The fastening boss is used for strengthening the fixed connection strength of the screw rod and the threaded sleeve.
The outer diameter of the fastening boss is matched with the inner diameter of the threaded sleeve.
The utility model discloses a thread bush screwdriver for full power screw system, the thread bush screwdriver use with the thread bush cooperation; the screwdriver comprises an operating rod, a reinforcing rod is arranged at the center of the bottom of the operating rod and surrounds the reinforcing rod, protruding operating teeth are arranged at the bottom of the operating rod and matched with the thread sleeve fixing grooves, and the diameter of the reinforcing rod is smaller than that of an inner cavity of the thread sleeve.
The length of the reinforcing rod is less than that of the inner cavity of the threaded sleeve.
When the metal bone fracture plate is disassembled, the screw and the threaded sleeve can be disassembled at one time, or the screw and the threaded sleeve can be disassembled firstly. When dismantling the thread bush, will the screwdriver insert in the thread bush cavity, in the stiffener gos deep into the thread bush cavity, in the thread bush fixed slot was gone into to the operation tooth card, handheld operation end, rotatory full power screw system's thread bush screwdriver, take off the thread bush.
Compared with the prior art, full power screw system's beneficial effect be:
the utility model realizes that the screw rocks in the threaded sleeve in the direction of 360 degrees by arranging the threaded sleeve and the screw which are matched with each other and connecting the bottom of the threaded sleeve and the bottom of the screw by screw threads; in addition, because the threaded sleeve and the screw rod are connected by threads instead of welding, the slight rotation between the threaded sleeve and the screw rod can offset the undesirable stress when the shear force is generated by torsion and the like. Therefore, the adverse stress of the metal bone fracture plate can be effectively reduced, the fracture probability of the metal bone fracture plate is reduced, the probability of secondary operation is reduced, the pain of a patient is relieved, and the operation risk is reduced. The utility model can also be applied to the non-medical environment with micro motion between some objects and the fixed platform.
Compared with the prior art, the beneficial effects of thread bush screwdriver be:
the utility model discloses a set up the thread bush screwdriver that the thread bush cooperation was used, the installation with dismantle the thread bush in-process, the stiffener has effectively strengthened the intensity of thread bush, improved the thread bush installation and has dismantled the success rate, avoid because dismantle unexpected being forced over the thread bush in the human body.
Drawings
Figure 1 is a schematic structural view of an embodiment of the present invention,
figure 2 is a cross-sectional structural schematic view of the threaded sleeve of figure 1,
figure 3 is a top view of figure 2,
figure 4 is a cross-sectional structural view of the screw of figure 1,
figure 5 is a top view of figure 4,
FIG. 6 is a schematic structural view of the bone and metal plate of the present invention,
figure 7 is a schematic view of the engagement of the threaded sleeve with the threaded sleeve driver,
fig. 8 is a bottom view of the screw cap screwdriver of fig. 7.
In the figure: 1. the bone fracture plate comprises a screw 2, a threaded sleeve 3, a bone 4, a metal bone fracture plate 5, a threaded sleeve screwdriver 6 and a full-power screw system;
1.1, a screw fixing groove 1.2, a trapezoidal thread 1.3, a screw head 1.4, a screw rod 1.5, a fastening external thread 1.6 and a fastening boss;
2.1, a thread bush fixing groove 2.2, a thread bush external thread 2.3, a thread bush body 2.4, a fastening internal thread 2.5 and a thread bush tip;
5.1, a reinforcing rod 5.2, an operating rod 5.3 and an operating tooth.
Detailed Description
The technical solution in the embodiments of the present invention will be further clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention:
example 1
As shown in fig. 1 to 5, the full power screw system of the present invention comprises a screw 1 and a thread sleeve 2 which are sleeved together, wherein the screw 1 comprises an inverted frustum-shaped screw head 1.3, a screw fixing groove 1.1 is formed on the top end surface of the screw head 1.3, a screw rod 1.4 is arranged at the bottom end of the screw head 1.3, a trapezoidal thread 1.2 is arranged on the side surface of the screw head 1.3, and a fastening external thread 1.5 is arranged on the side surface of the bottom end of the screw rod 1.4; the thread bush 2 includes thread bush body 2.3, and thread bush fixed slot 2.1 has been seted up on the 2.3 tops of thread bush body, and 2.3 surfaces of thread bush body are equipped with thread bush external screw thread 2.2, are equipped with fastening internal thread 2.4 on the 2 inner chamber bottom lateral walls of thread bush, and fastening internal thread 2.4 cooperatees with fastening external screw thread 1.5 and sets up. The length of the screw rod 1.4 is larger than the length of the inner cavity of the thread bushing 2. The length of the fastening internal thread 2.4 is less than that of the fastening external thread 1.5. The length of the fastening internal thread 2.4 is 1/5-1/10 of the length of the inner cavity of the thread bushing 2. A fastening boss 1.6 is arranged above the fastening external thread 1.5 of the screw rod 1.4. The outer diameter of the fastening boss 1.6 is adapted to the inner diameter of the threaded sleeve 2. The bottom of the threaded sleeve is provided with a threaded sleeve tip 2.5 for reducing the resistance to screwing into the bone.
The length and diameter of the screw shaft depend on the condition of the bone 3 to be fixed, the diameter of the screw shaft is usually 0.5mm-15mm, and the length of the screw shaft is usually 0.5mm-80 mm. The length of the thread bush is usually 0.8mm-11mm, and the length of the inner cavity of the thread bush is usually 0.45mm-79 mm; the thread bush diameter is usually 0.8mm to 18 mm; the internal cavity diameter of the thread bush is usually 0.8mm-16 mm.
Screw pole length is 15mm, and screw pole diameter is 1.5mm, and thread bush length is 17mm, and thread bush inner chamber length is 14.5mm, and the thread bush external diameter is 2mm, and thread bush inner chamber diameter is 1.7mm, and fastening boss external diameter is 1.7mm, and fastening internal thread length is 1.5mm, and fastening external screw thread length is 1.8 mm.
As shown in fig. 7-8, the screw cap screwdriver 5 of the present invention is used in conjunction with the screw cap 2 for the fully powered screw system; the screwdriver 5 comprises an operating rod 5.2, a reinforcing rod 5.1 is arranged at the center of the bottom of the operating rod 5.2 and surrounds the reinforcing rod 5.1, a protruding operating tooth 5.3 is arranged at the bottom of the operating rod 5.2, the operating tooth 5.3 is matched with a thread sleeve fixing groove 2.1, and the diameter of the reinforcing rod 5.1 is smaller than that of an inner cavity of the thread sleeve 2. The diameter of stiffener 5.1 can slightly be less than 2 inner chamber diameters of thread bush, and during the stiffener 5.1 stretched into the thread bush inner chamber, increased stiffener and thread bush bulk strength, was convenient for pull down the thread bush smoothly. The length of the reinforcing rod 5.1 is less than the length of the inner cavity of the thread bush 2.
The metal bone fracture plate has very high strength and limited strength, but is simple to move, and can be broken sometimes after repeated for countless times. Repeated research shows that the bones in different positions of the human body have different motion directions and different motion characteristics, and the metal bone fracture plate has high tensile strength and compressive strength, but the human body does rotational motion during motion, and the human bones are not standard geometric shapes but physiological curves of life under the elimination selection of 'survival of suitable persons' in nature. Therefore, firstly, the metal bone fracture plate is difficult to be completely matched with the bone; the metal bone plate is subjected to complete torsional force, and the metal bone plate has high compressive strength and tensile strength but low shear strength, so that the metal bone plate is broken after the shearing force generated by the torsional force on the metal bone plate exceeds the shear strength of the metal bone plate.
For example, the upper arm of the upper limb can rotate, and the upper end of the upper arm is spherically connected with the shoulder; the small arm can do the turning motion, and the thigh structure is not a straight line structure, and has a certain inclination angle from the thigh root to the knee.
Full power screw system, through screw and the thread bush of mutually supporting, screw and thread bush bottom are through fastening threaded connection, screw and thread bush upper portion leave the activity space, have realized the relative thread bush of screw and have freely removed on 360 degrees directions, when fixed skeleton and metal coaptation board, both can avoid stress to shelter from the fracture board that causes under the fracture board nonunion, the metal coaptation board fracture that causes under the reducible torsion stress again.
Working process or working principle:
as shown in fig. 6, according to different bones, a suitable metal bone plate 4 is selected or customized, the metal bone plate is placed on one side of the bone to be fixed, the bottom of a screw rod is connected with a threaded sleeve through a fastening external thread and a fastening internal thread to be integrated, the integrated threaded sleeve and a screw are screwed into the bone 3 through the metal bone plate, and a screw head is connected with the metal bone plate through a trapezoidal thread. The metal bone plate is fastened by a plurality of full-power screw systems 6, and the metal bone plate 4 can be a stainless steel bone plate.
The metal bone fracture plate can provide stress support for bones, avoid bone dislocation, ensure correct positions and directions of growth and recovery of the bones and ensure that a human body can be recovered. A certain gap is reserved between the screw rod and the threaded sleeve, and the screw rod and the screw head can have a certain moving range in the threaded sleeve and can rock in the direction of 360 degrees; in addition, because the threaded sleeve and the screw rod are connected by threads instead of welding, the slight rotation between the threaded sleeve and the screw rod can offset the undesirable stress when the shear force is generated by torsion and the like. Therefore, when the bone and the metal bone fracture plate are fixed, the shearing force of the bone to the metal bone fracture plate can be reduced, and the fracture probability of the metal bone fracture plate is reduced.
If the physical and chemical environment in the body leads the screw and the threaded sleeve to be integrated, the screw and the threaded sleeve can be taken out integrally.
The screw and the thread sleeve are connected through the threads, so that the screw and the thread sleeve can rotate, gaps are reserved on the upper portion between the screw and the thread sleeve, namely, the screw and the thread sleeve can relatively shake and can also relatively rotate, the screw and the metal bone fracture plate are fixedly connected, the metal bone fracture plate can shake or rotate along with the screw and the thread sleeve, the metal bone fracture plate and the screw are not movably fastened with each other, therefore, the rotation or the shake between the screw and the thread sleeve reduces the torsional force of the metal bone fracture plate, the shearing force of the metal bone fracture plate is reduced, the metal bone fracture plate does not need to bear the shearing force, the metal bone fracture plate only needs to bear the compressive stress, the bearing strength of the metal bone fracture plate is high, and therefore, the probability of fracture of the metal bone fracture plate is greatly reduced.
The utility model discloses in to the direction of structure and the description of relative position relation, it is right not to constitute like the description from top to bottom all around the utility model discloses a restriction only is the description convenient.
Claims (8)
1. A full-power screw system is characterized by comprising a screw (1) and a thread sleeve (2) which are sleeved together, wherein the screw (1) comprises an inverted frustum-shaped screw head (1.3), a screw fixing groove (1.1) is formed in the top end face of the screw head (1.3), a screw rod (1.4) is arranged at the bottom end of the screw head (1.3), trapezoidal threads (1.2) are arranged on the side face of the screw head (1.3), and fastening external threads (1.5) are arranged on the side face of the bottom end of the screw rod (1.4); the thread bush (2) comprises a thread bush body (2.3), a thread bush fixing groove (2.1) is formed in the top end of the thread bush body (2.3), thread bush external threads (2.2) are arranged on the outer surface of the thread bush body (2.3), fastening internal threads (2.4) are arranged on the side wall of the bottom of the inner cavity of the thread bush (2), and the fastening internal threads (2.4) and the fastening external threads (1.5) are matched and arranged.
2. The all-power screw system according to claim 1, wherein the screw shaft (1.4) length is greater than the screw sleeve (2) lumen length.
3. Full power screw system according to claim 1, characterized in that the length of the fastening internal thread (2.4) is smaller than the length of the fastening external thread (1.5).
4. Full power screw system according to claim 3, characterized in that the length of the fastening female thread (2.4) is 1/5-1/10 of the length of the lumen of the threaded sleeve (2).
5. The all-power screw system according to claim 1, characterized in that a fastening boss (1.6) is provided above the fastening external thread (1.5) of the screw shank (1.4).
6. Full power screw system according to claim 1, characterized in that the outer diameter of the fastening boss (1.6) is adapted to the inner diameter of the threaded sleeve (2).
7. A screw-sleeve screwdriver for an all-power screw system according to any one of claims 1 to 6, characterised in that said screw-sleeve screwdriver (5) is used in conjunction with a screw-sleeve (2);
screwdriver (5) including action bars (5.2), action bars (5.2) bottom central point puts and is equipped with stiffener (5.1), encircles stiffener (5.1), action bars (5.2) bottom is equipped with protruding operation tooth (5.3), operation tooth (5.3) and thread bush fixed slot (2.1) cooperate the setting, the diameter of stiffener (5.1) is less than thread bush (2) inner chamber diameter.
8. The screw-sleeve screwdriver according to claim 7, wherein the length of the reinforcing rod (5.1) is less than the length of the inner cavity of the screw-sleeve (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920337202.3U CN209847356U (en) | 2019-03-15 | 2019-03-15 | Full-power screw system and thread sleeve screwdriver used for same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920337202.3U CN209847356U (en) | 2019-03-15 | 2019-03-15 | Full-power screw system and thread sleeve screwdriver used for same |
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| Publication Number | Publication Date |
|---|---|
| CN209847356U true CN209847356U (en) | 2019-12-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920337202.3U Active CN209847356U (en) | 2019-03-15 | 2019-03-15 | Full-power screw system and thread sleeve screwdriver used for same |
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| CN (1) | CN209847356U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113967061A (en) * | 2020-07-24 | 2022-01-25 | 常州华森医疗器械有限公司 | Special screw for rib plate |
-
2019
- 2019-03-15 CN CN201920337202.3U patent/CN209847356U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113967061A (en) * | 2020-07-24 | 2022-01-25 | 常州华森医疗器械有限公司 | Special screw for rib plate |
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