CN210498653U

CN210498653U - Polishing device capable of absorbing polylactic acid bone screws

Info

Publication number: CN210498653U
Application number: CN201921302460.4U
Authority: CN
Inventors: 张军平; 程相乐; 杨吕昆; 吕跃群; 俞惠菊
Original assignee: Tianjin Boshuobei Biological Technology Co ltd
Current assignee: Tianjin Boshuobei Biological Technology Co ltd
Priority date: 2019-08-13
Filing date: 2019-08-13
Publication date: 2020-05-12
Anticipated expiration: 2029-08-13

Abstract

The utility model discloses a but there is clastic problem in the thread clearance of absorbable polylactic acid bone screw in the present stage has been solved to absorbable polylactic acid bone screw's grinding device. The polishing device comprises a rack, a polishing head and a driving motor, wherein the rack is also provided with a polishing clamp, the polishing clamp is provided with a polishing through hole, and the polishing clamp also comprises a first annular frame and a second annular frame; the first annular frame is provided with a plurality of mounting through holes and a supporting bearing for mounting the screw head of the absorbable polylactic acid bone screw; the second annular frame is provided with a support hole for inserting the end part of the screw rod part of the polylactic acid bone screw, and the grinding device of the absorbable polylactic acid bone screw can grind and polish the thread of the absorbable polylactic acid bone screw, so that the content of debris in the thread gap of the absorbable polylactic acid bone screw is reduced.

Description

Polishing device capable of absorbing polylactic acid bone screws

Technical Field

The utility model relates to a polylactic acid bone screw production and processing field especially relates to a grinding device of absorbable polylactic acid bone screw.

Background

The polylactic acid bone screw is used as a bone fixing medical appliance which is implanted into a human body and can be absorbed. After the polylactic acid bone screw is implanted into a human body, the polylactic acid bone screw can be discharged out of the body after long-time degradation, so that the polylactic acid bone screw has higher requirements on the sanitary conditions.

Referring to fig. 1, an absorbable polylactic acid bone screw 1 comprises a screw head portion 11 and a screw shaft portion 12, wherein the screw shaft portion 12 is provided with an external thread 121.

At present, during the process of producing the absorbable polylactic acid bone screw 1, the absorbable polylactic acid bone screw 1 may have chips in the gap of the external thread 121 of the screw portion 12. In order to meet the sanitary requirement of the absorbable polylactic acid bone screw 1, it is necessary to remove the debris in the gap of the external thread 121 of the absorbable polylactic acid bone screw 1 and polish the external thread 121 of the absorbable polylactic acid bone screw 1, and therefore, a polishing device for the absorbable polylactic acid bone screw needs to be developed at this stage.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a but grinding device of absorption polylactic acid bone screw can carry out burnishing and polishing to the screw thread of absorption polylactic acid bone screw, reduces the piece content in the thread clearance of absorption polylactic acid bone screw.

The above technical purpose of the present invention can be achieved by the following technical solutions:

a polishing device for absorbable polylactic acid bone screws is used for polishing external threads of the absorbable polylactic acid bone screws, each absorbable polylactic acid bone screw comprises a screw head part and a screw rod part, the polishing device comprises a rack, a polishing head and a driving motor, the polishing head is rotatably installed on the rack, the driving motor drives the polishing head to rotate, a polishing clamp is further arranged on the rack, a polishing through hole for the polishing head to insert is formed in the polishing clamp, and the polishing clamp further comprises a first annular frame and a second annular frame which are oppositely arranged; the first annular frame is circumferentially provided with a plurality of mounting through holes, and supporting bearings are arranged in the mounting through holes; the support bearing comprises an outer ring, an inner ring and a plurality of balls arranged between the inner ring and the outer ring; the outer wall of the outer ring is attached to the inner wall of the mounting through hole; the inner ring is provided with a mounting counter bore matched with the screw head of the polylactic acid bone screw; the second annular frame is provided with support holes which correspond to the mounting through holes one by one and are used for inserting the end parts of the screw rod parts of the polylactic acid bone screws.

Through adopting above-mentioned technical scheme, above-mentioned absorbable polylactic acid bone screw's grinding device's the principle of polishing is as follows: 1. installing the absorbable polylactic acid bone screw on a first annular frame and a second annular frame of the grinding clamp, so that the screw head of the absorbable polylactic acid bone screw is clamped in the installation counter bore, and the end part of the screw rod part of the absorbable polylactic acid bone screw is inserted into the supporting hole; 2. the driving motor is started, so that the polishing head polishes and polishes the threads of the absorbable polylactic acid bone screw, and the absorbable polylactic acid bone screw also rotates relatively on the polishing clamp due to the rotary driving of the polishing head, so that the threads of the absorbable polylactic acid bone screw are polished and polished. Wherein, the setting of support bearing can assist the rotation of absorbable polylactic acid bone screw on the anchor clamps of polishing. Above-mentioned grinding device of absorbable polylactic acid bone screw can realize polishing to the screw thread of absorbable polylactic acid bone screw to reduce the piece content in the screw thread clearance of absorbable polylactic acid bone screw, promote the cleanliness factor of absorbable polylactic acid bone screw.

The utility model discloses further set up to, first annular frame circumference evenly is equipped with eight installation through-holes.

Through adopting above-mentioned technical scheme, eight installation through-holes can make the anchor clamps of polishing can install eight absorbable polylactic acid bone screws simultaneously for the grinding device of absorbable polylactic acid bone screw can carry out burnishing and polishing to eight absorbable polylactic acid bone screws simultaneously, promotes burnishing and polishing's efficiency.

The utility model discloses further set up to, first ring frame is adjacent two still be equipped with between the collar connect in the connecting rod of second ring frame, connecting rod to adjacent two the distance of collar is the same.

Through adopting above-mentioned technical scheme, through the mode of arranging of connecting rod connection and connecting rod between first annular frame and the second annular frame, the structural strength of whole anchor clamps of polishing all can be promoted.

The utility model is further arranged in that the first annular frame is provided with a mounting ring at the mounting through hole; and the second annular frame is provided with a support ring at the support hole.

By adopting the technical scheme, the size of the first annular frame is reduced on the premise of ensuring the size of the mounting through hole by the mounting ring; the setting of support ring reduces the size of second annular frame under the prerequisite of the size of guaranteeing the support hole. The arrangement helps to improve the compactness of the grinding clamp.

The utility model is further arranged in that the frame is also provided with a sliding mechanism which drives the polishing clamp to slide along the axial direction of the polishing clamp; the polishing clamp is driven by the sliding mechanism to be provided with a polishing station and an assembling station; when the polishing station is arranged, the polishing head is positioned in the polishing through hole; and when the assembling station is arranged, the polishing head is separated from the polishing through hole.

Through adopting above-mentioned technical scheme for glide machanism can drive the anchor clamps of polishing and be located the assembly station, and the polishing head breaks away from the through-hole of polishing this moment, thereby conveniently can absorb polylactic acid bone screw and dismantle from the anchor clamps of polishing.

The utility model is further provided with that the sliding mechanism comprises a sliding platform for installing the polishing clamp, a lead screw nut arranged at the bottom of the sliding platform, a rotary lead screw matched with the lead screw nut and arranged along the axial direction of the polishing clamp, and a lead screw motor for driving the rotary lead screw to rotate; the bottom of the sliding platform is also provided with a linear sliding block, and the rack is provided with a linear guide rail matched with the linear sliding block.

Through adopting above-mentioned technical scheme, adopt the cooperation of above-mentioned screw nut and rotatory lead screw to drive the slip of anchor clamps of polishing, the precision of sliding is higher to the stability of anchor clamps at the in-process that slides has also been guaranteed to the polishing.

The utility model discloses further set up to, the frame is in lead screw nut's both sides all are equipped with one linear guide, every linear guide corresponds and is equipped with two the sharp slider.

Through adopting above-mentioned technical scheme, can promote the stability of platform of sliding at the in-process that slides.

The utility model discloses further set up to, the top surface of platform that slides is in the dust collecting tank has been seted up to the below of anchor clamps of polishing.

Through adopting above-mentioned technical scheme, the setting of dust collecting tank can be collected the piece that the head of polishing got off from the screw thread of absorbable polylactic acid bone screw of polishing.

To sum up, the utility model discloses following beneficial effect has:

1. a polishing device for absorbable polylactic acid bone screws comprises a polishing head, a driving motor and a polishing clamp, wherein the polishing head can polish the absorbable polylactic acid bone screws only by mounting the absorbable polylactic acid bone screws on the polishing clamp, so that the content of debris in threads of the absorbable polylactic acid bone screws is reduced, and the cleanliness of the absorbable polylactic acid bone screws can be improved;

2. a sliding mechanism capable of driving the polishing clamp to slide is arranged on the rack, so that the absorbable polylactic acid bone screw can be conveniently disassembled and assembled on the polishing clamp;

3. the top surface of the sliding platform is provided with a dust collecting groove, and the chips which are ground and polished from the threads of the absorbable polylactic acid bone screw by the grinding head can be collected.

Drawings

FIG. 1 is a schematic structural view of a resorbable polylactic acid bone screw;

fig. 2 is a schematic structural diagram of a polishing device capable of absorbing a polylactic acid bone screw according to the present invention;

FIG. 3 is a schematic view of the bottom structure of the sliding platform of the present invention;

fig. 4 is a schematic structural view of the polishing jig of the present invention;

FIG. 5 is an enlarged view taken at A in FIG. 4;

fig. 6 is a schematic structural diagram of the middle support bearing of the present invention.

In the figure: 1. the polylactic acid bone screw can be absorbed; 11. a head portion; 12. a screw section; 121. an external thread; 2. a frame; 21. a head box; 3. polishing head; 4. a drive motor; 5. polishing the clamp; 51. polishing the through hole; 52. a first annular frame; 521. a mounting ring; 5211. mounting a through hole; 53. a second annular frame; 531. a support ring; 532. a support hole; 54. a support bearing; 541. an outer ring; 542. an inner ring; 5421. mounting a counter bore; 543. a ball bearing; 55. a connecting rod; 56. a clamp bracket; 561. mounting a bottom plate; 562. a first upright post; 563. a second upright post; 6. a sliding mechanism; 61. a sliding platform; 611. mounting a bump; 612. a dust collecting groove; 62. a lead screw nut; 63. rotating the lead screw; 64. a lead screw motor; 65. a linear guide rail; 66. a linear slider.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, a grinding device for absorbable polylactic acid bone screws is used for grinding threads of absorbable polylactic acid bone screws 1. In this embodiment, the absorbable polylactic acid bone screw 1 includes a screw head 11 and a screw rod 12, wherein an outer side surface of the screw head 11 is spherical, and an outer side surface of the screw rod 12 is provided with an external thread 121.

Referring to fig. 2, the polishing device for the absorbable polylactic acid bone screw comprises a frame 2, a polishing head 3, a driving motor 4, a polishing clamp 5 and a sliding mechanism 6.

A head box 21 is arranged on one side of the top of the frame 2, the polishing head 3 is rotatably mounted on the head box 21, and a driving motor 4 is mounted on the head box 21 and used for driving the polishing head 3 to rotate. In this embodiment, the polishing head 3 is a nylon polishing head.

Referring to fig. 2 and 3, the slide mechanism 6 is mounted on the top surface of the frame 2 and is located at one side of the headstock 21. The sliding mechanism 6 includes a sliding platform 61, a lead screw nut 62 installed at the bottom of the sliding platform 61, a rotary lead screw 63 matched with the lead screw nut 62, and a lead screw motor 64 driving the rotary lead screw 63 to rotate. Wherein, the bottom of the sliding platform 61 is provided with a mounting lug 611 for mounting the screw nut 62, the rotating screw 63 is parallel to the direction of the rotation axis of the polishing head 3, and in the present embodiment, the axis of the rotating screw 63 and the rotation axis of the polishing head 3 are located in the same vertical plane.

The top surface of the frame 2 is provided with a linear guide rail 65 on both sides of the rotary screw 63, and the linear guide rails 65 are parallel to the axis of the rotary screw 63. Two linear sliding blocks 66 are correspondingly arranged on each linear guide rail 65, and the linear sliding blocks 66 are all arranged on the bottom surface of the sliding platform 61.

The top surface of the sliding platform 61 is provided with a dust collecting groove 612.

The grinding jig 5 is provided with a grinding through-hole 51 into which the grinding head 3 is inserted. The axis of the sanding through-hole 51 is located on the same line as the rotational axis of the sanding head 3.

The sanding jig 5 further includes a first annular shelf 52 and a second annular shelf 53 disposed in opposition.

Referring to fig. 4 and 5, the first annular frame 52 is uniformly provided with eight mounting rings 521 in the circumferential direction. Each of the mounting rings 521 has a mounting through hole 5211, and the axis of the mounting through hole 5211 is parallel to the rotational axis of the sanding head 3. The first annular frame 52 is mounted with the support bearing 54 in the mounting through hole 5211.

Referring to fig. 6, the support bearing 54 includes an outer ring 541, an inner ring 542, and a plurality of balls 543 interposed between the inner ring 542 and the outer ring 541. The outer wall of the outer ring 541 is attached to the inner wall of the mounting ring 521, and the inner ring 542 has a mounting counter bore 5421 which is matched with the shape of the head 11 of the polylactic acid bone screw.

The second annular frame 53 is provided with support rings 531 corresponding one-to-one to the mounting rings 521, and the support rings 531 have support holes 532 corresponding one-to-one to the mounting through holes 5211 and into which the ends of the screw portions 12 of the polylactic acid bone screws are inserted.

The first annular frame 52 is further provided with a connecting rod 55 connected to the second annular frame 53 between two adjacent mounting rings 521. Wherein, the connecting rod 55 is parallel to the axial direction of the grinding through hole 51, and the distances from the connecting rod 55 to the two adjacent mounting rings 521 are the same.

Referring to fig. 2 and 4, the polishing jig 5 further includes a jig support 56, and the jig support 56 includes a mounting base plate 561, a first upright 562 disposed on the top surface of the mounting base plate 561 and connected to the bottom of the first annular frame 52, and a second upright 563 disposed on the top surface of the mounting base plate 561 and connected to the bottom of the second annular frame 53. The mounting base 561 is fixed to the bottom surface of the dust collecting groove 612 of the sliding platform 61 by screws, and the clamp bracket 56 includes two first vertical posts 562 and two second vertical posts 563. When the grinding jig 5 is mounted on the slide table 61, the first annular frame 52 in the grinding jig 5 is located at the end remote from the grinding head 3.

Referring to fig. 1 and 2, the grinding jig 5 is driven by the above-described slide mechanism 6 so that the grinding jig 5 has a grinding station and an assembling station. When the polishing clamp 5 is positioned at the polishing station, the polishing head 3 is positioned in the polishing through hole 51, and the polishing head 3 can simultaneously polish the absorbable polylactic acid bone screw 1 arranged on the polishing clamp 5; when the grinding clamp 5 is positioned at the assembling station, the grinding head 3 is separated from the grinding through hole 51, so that the absorbable polylactic acid bone screw 1 on the grinding clamp 5 can be conveniently disassembled and assembled.

The grinding and polishing process of the grinding device for the absorbable polylactic acid bone screw 1 is as follows: 1. driving the sliding mechanism 6 to enable the grinding clamp 5 to be located at the assembling station, and sequentially installing the eight absorbable polylactic acid bone screws 1 on the grinding clamp 5; 2. the sliding mechanism 6 is driven to enable the grinding clamp 5 to slide to the grinding station, the grinding head 3 is driven to rotate, the grinding head 3 can drive the absorbable polylactic acid bone screw 1 to synchronously rotate at the moment, and therefore the grinding head 3 can grind and polish the threads of the absorbable polylactic acid bone screw 1; 3. after 10 minutes of grinding and polishing, the sliding mechanism 6 is driven to enable the grinding clamp 5 to slide to the assembling station, and the absorbable polylactic acid bone screw 1 on the grinding clamp 5 is disassembled.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Claims

1. A polishing device for absorbable polylactic acid bone screws is used for polishing external threads (121) of absorbable polylactic acid bone screws (1), wherein each absorbable polylactic acid bone screw (1) comprises a screw head part (11) and a screw rod part (12), the polishing device comprises a rack (2), a polishing head (3) rotatably mounted on the rack (2) and a driving motor (4) for driving the polishing head (3) to rotate, and is characterized in that the rack (2) is further provided with a polishing clamp (5), the polishing clamp (5) is provided with a polishing through hole (51) for the polishing head (3) to be inserted into, and the polishing clamp (5) further comprises a first annular frame (52) and a second annular frame (53) which are oppositely arranged; the first annular frame (52) is circumferentially provided with a plurality of mounting through holes (5211), and a support bearing (54) is arranged in each mounting through hole (5211); the support bearing (54) comprises an outer ring (541), an inner ring (542) and a plurality of balls (543) arranged between the inner ring (542) and the outer ring (541); the outer wall of the outer ring (541) is attached to the inner wall of the mounting through hole (5211); the inner ring (542) is provided with a mounting counter bore (5421) matched with the screw head part (11) of the polylactic acid bone screw; the second annular frame (53) has support holes (532) corresponding to the mounting through holes (5211) one by one and into which ends of the screw portions (12) of the polylactic acid bone screws are inserted.

2. The grinding device for the absorbable polylactic acid bone screw according to claim 1, wherein the first annular frame (52) is uniformly provided with eight mounting through holes (5211) in the circumferential direction.

3. The grinding device of the absorbable polylactic acid bone screw according to claim 1, wherein the first annular frame (52) is provided with a mounting ring (521) at the mounting through hole (5211); the second annular frame (53) is provided with a support ring (531) at the support hole (532).

4. The grinding device for the absorbable polylactic acid bone screw is characterized in that the first annular frame (52) is further provided with a connecting rod (55) connected to the second annular frame (53) between two adjacent mounting rings (521), and the distance from the connecting rod (55) to two adjacent mounting rings (521) is the same.

5. The grinding device for the absorbable polylactic acid bone screw according to claim 1, characterized in that the frame (2) is further provided with a sliding mechanism (6) for driving the grinding clamp (5) to slide along the axial direction thereof; the grinding clamp (5) is driven by the sliding mechanism (6) to be provided with a grinding station and an assembling station; when the polishing station is used, the polishing head (3) is positioned in the polishing through hole (51); and when the assembling station is used, the polishing head (3) is separated from the polishing through hole (51).

6. The grinding device for the absorbable polylactic acid bone screw according to claim 5, wherein the sliding mechanism (6) comprises a sliding platform (61) for installing the grinding fixture (5), a lead screw nut (62) installed at the bottom of the sliding platform (61), a rotary lead screw (63) matched with the lead screw nut (62) and arranged along the axial direction of the grinding fixture (5), and a lead screw motor (64) for driving the rotary lead screw (63) to rotate; the bottom of the sliding platform (61) is also provided with a linear sliding block (66), and the rack (2) is provided with a linear guide rail (65) matched with the linear sliding block (66).

7. The grinding device for the absorbable polylactic acid bone screw according to claim 6, wherein the machine frame (2) is provided with one linear guide rail (65) on each side of the lead screw nut (62), and each linear guide rail (65) is provided with two linear sliding blocks (66).

8. The grinding device for the absorbable polylactic acid bone screw according to claim 6, wherein the top surface of the sliding platform (61) is provided with a dust collecting groove (612) below the grinding clamp (5).