CN108296812B - Multi-angle machining clamp of bone fracture plate - Google Patents

Abstract

The invention discloses a multi-angle processing jig for a bone plate, which comprises a base, a chute in the middle of the base, T-shaped grooves on both sides of the chute, and screw seats at both ends of the base, the screw seats are provided with The screw rod, one end of the base is provided with a T-shaped seat, the other end of the base is provided with a sliding seat, both ends of the sliding seat are provided with locking bolts, a nut is provided on the locking bolt, and the upper ends of the sliding seat and the T-shaped seat are sleeved There is a fixed rod one, four positioning holes are evenly distributed in the middle of the fixed rod one along the circumference, the sliding seat and the T-shaped seat are provided with fixed pins, one end of the fixed rod is provided with a screw rod one, and the screw rod one is provided with a nut two for fixing The other end of the rod is provided with a column, the upper end of the column is provided with a rectangular hole, the upper end of the rectangular hole is provided with a rotating rod, the bottom of the rotating rod is provided with a pressure block, the lower end of the column is provided with a fixed rod two, and the front end of the fixed rod two is provided with a second screw for fixing The second rod is sleeved with a limit block, and the second screw rod is provided with a third nut. The manufacturing cost of the fixture is relatively low, and the fixture has the advantages of high positioning accuracy, wear resistance, and convenient use.

Description

A multi-angle processing jig for bone plate

technical field

The invention relates to the field of medical device processing, in particular to a multi-angle processing fixture for a bone plate.

Background technique

The processing device of the previous three-axis machining center can only process workpieces with a single angle. When machining is used, it cannot process workpieces with large-angle curved surfaces, which is subject to great limitations. For example, the main processes of processing straight bone plates include hole processing and end face processing. , in actual processing, multiple fixtures are usually required to complete the processing of the bone plate, and the manufacturing cost of the fixture is high and the processing efficiency is low.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a multi-angle processing jig for a bone plate, so as to solve the above-mentioned defects caused in the prior art.

In order to achieve the above purpose, the present invention provides the following technical solutions: a multi-angle processing jig for a bone plate, comprising a base, a chute in the middle of the base, and T-shaped grooves on both sides of the chute, the The two ends of the base are provided with a screw seat, the screw seat is provided with a screw rod, one end of the base is provided with a T-shaped seat, and the two ends of the T-shaped seat are respectively fixed on the base with fixing bolts. The other end is provided with a cross-shaped sliding seat and the lower end is located in the sliding groove, the sliding seat and the screw rod are threadedly connected, the two ends of the sliding seat are provided with locking bolts, and the head of the locking bolt is located in the In the T-shaped groove, the locking bolt is provided with a nut 1, the upper ends of the sliding seat and the T-shaped seat are sleeved with a fixing rod 1, and the middle part of the fixing rod 1 is evenly distributed along the circumference with four positioning holes, so Both the sliding seat and the T-shaped seat are provided with fixing pins and are vertically inserted into the positioning holes. One end of the fixing rod is provided with a screw rod, the screw rod one is provided with a nut two, and the other end of the fixing rod is There is a column, the column is parallel to the line connecting the two opposite positioning holes, the upper end of the column is provided with a rectangular hole, the upper end of the rectangular hole is provided with a rotating rod, the rotating rod extends into the rectangular hole and the bottom There is a pressing block, the lower end of the column is provided with a second fixing rod, the front end of the second fixing rod is provided with a second screw, the second fixing rod is sleeved with a limit block, and the second screw is provided with a third nut.

Preferably, rubber pads are provided on the lower end of the pressing block, the bottom of the rectangular hole, the top of the second fixing rod and the top of the limiting block.

Preferably, there is an interference fit between the first fixing rod and the circular hole of the sliding seat, and an interference fit between the fixing pin and the positioning hole.

Preferably, a rotating nut is welded to the front end of the lead screw.

Preferably, both ends of the base are provided with lugs.

The beneficial effects of adopting the above technical solutions are: in the multi-angle processing of the bone plate of the present invention, before the hole position processing of the bone plate is performed, two fixing pins are first pulled out and two nuts are loosened, and four positioning holes constitute one Cross connection, the column is parallel to one of the connecting lines, turn the column so that one end of the rectangular hole is at the upper end and the column is perpendicular to the horizontal line, insert the fixing pin into the positioning hole, turn the nut 2 to lock the fixing rod 1, the fixing pin reduces the processing of the column. Rotation error, nut 2 reduces the error of the front and rear movement of the column during processing, put one end of the bone plate into the rectangular hole of the column on the T-shaped seat, turn the rotating rod so that the pressure block presses down one end of the bone plate, loosen the nut one, turn The screw rod drives the sliding seat to move, so that the other end of the bone plate enters the rectangular hole of the upper column of the sliding seat, turn the nut one to make the locking bolt fix the sliding seat, and then turn the rotating rod to make the pressure block press down on the bone plate. On the other end, the clamping of the butt joint plate is completed above, and the joint plate is drilled by the drilling equipment. After the drilling operation is completed, the fixing pin is pulled out, the second nut is loosened, the turning rod is turned to make the pressure block upward, and the bone plate is taken out. , then turn both uprights 180 degrees so that the second end of the fixing rod is facing upward, take out the limit block and nut 3, loosen the nut 1, turn the screw rod to move the sliding seat, so that the two holes at both ends of the bone plate can be Insert the two fixing two, after inserting, turn the nut 1 to fix the sliding seat, then insert the fixing pin into the positioning hole, and turn the nut 2 to lock the column, then put the limit block on the fixing rod 2, put the nut Three screw into the second screw, so that the limit block presses the bone plate, and the fixing of the bone plate is completed through the hole of the bone plate, and then the machining center connects one side of the bone plate for milling operation. When the other side needs to be processed, the Unscrew the nut 3 and take out the limit block, take the bone plate out from the fixing rod 2, turn it over and put it back on the fixing rod 2, lock the limit block with the nut 3, and the machining center will fix it on the other side. While milling operation, the curved surface with a certain angle on the side of the bone plate is not easy to process. Before milling the side surface, loosen the second nut and take out the fixing pin, so that the two columns and the bone plate are rotated 90 degrees in one direction, and then Insert the fixing pin into the positioning hole and fasten it with the second nut. At this time, one side end of the bone plate is facing upwards. The side end face of the bone plate is milled by the machining center. Take out the fixing pin and loosen the second nut. Turn the bone plate 180 degrees so that the other side of the plate faces upwards, insert the fixing pin and lock it with the second nut, and the other end face of the plate is milled by the machining center. It has the advantages of high precision, wear resistance and convenient use. It can clamp the drilling and surface milling of the bone plate at the same time, integrate multiple clamps in the traditional process into one, and change the clamping of the bone plate by rotating the column. Angle so that the side of the plate faces upwards for tool milling.

Description of drawings

Fig. 1 is the front view of the present invention;

Figure 2 is a side view of the present invention;

Fig. 3 is the top view of the present invention;

Fig. 4 is the front view of the column part of the present invention;

Figure 5 is a side view of a column portion of the present invention.

Among them, 1- base, 101- T-shaped groove, 102- lug plate, 103- chute, 2- screw seat, 3- screw, 31- turning nut, 4- sliding seat, 41- nut one, 42- Locking bolt, 5-fixing pin, 6-post, 61-fixing rod 1, 611-screw 1, 612-positioning hole, 62-nut 2, 63-rectangular hole, 64-rotating rod, 65-pressure block, 66 -Second rod, 661-screw two, 67-limit block, 68-nut three, 7-T-shaped seat, 71-fixing bolt, 8-rubber pad.

Detailed ways

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Figures 1-5 show a specific embodiment of the present invention: a multi-angle processing jig for a bone plate, comprising a base 1, a chute 103 is provided in the middle of the base 1, and T-shaped grooves are provided on both sides of the chute 103 101, the two ends of the base 1 are provided with a screw seat 2, the screw seat 2 is provided with a screw 3, one end of the base 1 is provided with a T-shaped seat 7, and the two ends of the T-shaped seat 7 are respectively It is fixed on the base 1 with fixing bolts 71. The other end of the base 1 is provided with a cross-shaped sliding seat 4 and the lower end is located in the sliding groove 103. The sliding seat 4 and the screw rod 3 are threadedly connected. 4 is provided with locking bolts 42 at both ends, the head of the locking bolt 42 is located in the T-shaped groove 101, the locking bolt 42 is provided with a nut 41, the sliding seat 4 and the T-shaped seat 7 The upper end of the sliding seat 4 is sleeved with a fixing rod 1 61, and the middle part of the fixing rod 1 61 is evenly distributed with four positioning holes 612 along the circumference. In the hole 612, one end of the fixing rod 61 is provided with a screw rod 1 611, the screw rod 1 611 is provided with a second nut 62, and the other end of the fixing rod 1 61 is provided with a column 6, the column 6 is connected with two of them. The lines connecting the opposite positioning holes 612 are parallel, the upper end of the column 6 is provided with a rectangular hole 63, the upper end of the rectangular hole 63 is provided with a rotating rod 64, the rotating rod 64 extends into the rectangular hole 63 and the bottom is provided with a pressing block 65. The lower end of the column 6 is provided with a second fixing rod 66, the front end of the second fixing rod 66 is provided with a second screw 661, the second fixing rod 66 is sleeved with a limit block 67, and the second screw 661 is provided with a second screw 661. Nut three 68.

In this embodiment, the lower end of the pressing block 65, the bottom of the rectangular hole 63, the top of the second fixing rod 66 and the top of the limit block 67 are all provided with rubber pads 8, which can protect the metal bone when the bone plate is clamped. Avoid scratches on the surface of the board.

In this embodiment, there is an interference fit between the fixing rod 1 61 and the circular hole of the sliding seat 4, and an interference fit between the fixing pin 5 and the positioning hole 612, which can reduce the interference fit of the fixing rod 1 61. For the shaking error in the circular hole of the sliding seat 4 , the insertion of the fixing pin 5 into the positioning hole 612 can reduce the rotation error of the fixing rod 1 61 .

In this embodiment, the front end of the screw rod 3 is welded with a rotating nut 31 to facilitate the rotation of the screw rod 3 .

In this embodiment, both ends of the base 1 are provided with lugs 102, and the lugs 102 are provided with round holes for bolt fixing, so that the fixture can be easily installed on the machining center.

Based on the above, in the multi-angle machining of a bone plate of the present invention, before performing hole machining on the bone plate, two fixing pins 5 are pulled out and the second nut 62 is loosened, and the four positioning holes 612 form a cross connection. Line, the column 6 is parallel to one of the connecting lines, rotate the column 6 so that one end of the rectangular hole 63 is located at the upper end and the column 6 is perpendicular to the horizontal line, insert the fixing pin 5 into the positioning hole 612, and turn the nut 31 to lock the fixing rod 1 61, The fixed pin 5 reduces the rotation error of the column 6 during processing, and the second nut 62 reduces the forward and backward movement error of the column 6 during processing. Put one end of the bone plate into the rectangular hole 63 of the column 6 on the T-shaped seat 7, and turn the rotating rod 64 to make the pressure block 65. Press down one end of the bone plate, loosen the nut 41, turn the screw rod 3 to drive the slide 4 to move, so that the other end of the bone plate enters the rectangular hole 63 of the column 6 on the slide 4, and turn the nut 31 to lock the Tighten the bolt 42 to fix the sliding seat 4, and then turn the rotating rod 64 to make the pressing block 65 press down the other end of the bone plate, and the clamping of the bone plate is completed. After drilling, pull out the fixing pin 5, loosen the second nut 62, turn the rotating rod 64 to make the pressure block 65 upward, take out the bone plate, and then turn the two uprights 6 by 180 degrees, so that one end of the second fixing rod 66 faces , take out the limit block 67 and the nut 3 68, loosen the nut 1 41, turn the screw 3 to move the slide 4, so that the two holes at both ends of the bone plate can be inserted into the two fixing 2, after inserting, turn the nut 31 first Once the sliding seat 4 is fixed, insert the fixing pin 5 into the positioning hole 612, and turn the nut 31 to lock the column 6, then put the limit block 67 on the fixing rod 266, and screw the nut 368 into the screw On the second 661, the limit block 67 presses the bone plate, and the fixing of the bone plate is completed through the hole of the bone plate, and then one side of the bone plate is milled by the machining center. When the other side needs to be processed, the nut three 68 Unscrew and take out the limit block 67, take out the bone plate from the second fixing rod 66, turn it over and put it back on the second fixing rod 66, put the limit block 67 in and lock it with the third nut 68, and then use the processing The other side is milled by the center. The curved surface with a certain angle on the side of the bone plate is not easy to process. Before milling the side surface, first loosen the nut 62 and take out the fixing pin 5, so that the two uprights 6 and the bone plate face each other. Rotate 90 degrees in one direction, then insert the fixing pin 5 into the positioning hole 612, and lock it with the second nut 62 at the same time. At this time, one side end of the bone plate is facing upwards. Pin 5 and loosen the second nut 62, turn the column 6 together with the bone plate 180 degrees so that the other end of the bone plate faces upward, insert the fixing pin 5 and lock it with the second nut 62, and the other end face of the other side is fixed by the machining center. For milling operations, the production cost of this fixture is relatively low, and it has the advantages of high positioning accuracy, wear resistance, and convenient use. The fixture is integrated into a whole, and the clamping angle of the bone plate can be changed by rotating the column 6, so that the bone The side end of the plate is facing up for easy milling by the tool.

The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, some modifications and improvements can be made without departing from the inventive concept of the present invention, which belong to the present invention. the scope of protection of the invention.

Claims (5)

1. A multi-angle processing fixture for a bone plate, comprising a base, the middle of the base is provided with a chute, the two sides of the chute are provided with T-shaped grooves, the two ends of the base are provided with screw seats, The screw seat is provided with a screw rod, which is characterized in that: one end of the base is provided with a T-shaped seat, two ends of the T-shaped seat are respectively fixed on the base with fixing bolts, and the other end of the base is provided with a cross-shaped seat. The lower end of the sliding seat is located in the sliding groove, the sliding seat and the screw rod are threadedly connected, the two ends of the sliding seat are provided with locking bolts, the head of the locking bolt is located in the T-shaped groove, the The locking bolt is provided with a nut 1, the upper ends of the sliding seat and the T-shaped seat are sleeved with a fixing rod 1, and the middle part of the fixing rod 1 is evenly distributed along the circumference with four positioning holes, the sliding seat and the T-shaped seat. There are fixed pins on the top and are vertically inserted in the positioning holes. One end of the fixed rod is provided with a screw rod, and the screw rod is provided with a second nut. The other end of the fixed rod is provided with a column, and the column Parallel to the line connecting the two opposite positioning holes, the upper end of the column is provided with a rectangular hole, the upper end of the rectangular hole is provided with a rotating rod, the rotating rod extends into the rectangular hole and the bottom is provided with a pressure block, the The lower end of the column is provided with a second fixing rod, the front end of the second fixing rod is provided with a second screw rod, the second fixing rod is sleeved with a limit block, and the second screw rod is provided with a third nut. 2. The multi-angle processing jig for a bone plate according to claim 1, wherein the lower end of the pressing block, the bottom of the rectangular hole, the top of the second fixing rod and the top of the limit block are all provided with rubber pads . 3 . The multi-angle processing jig for a bone plate according to claim 1 , wherein the first fixing rod and the circular hole of the sliding seat are interference fit, and the fixing pin and the positioning hole are overfitting. 4 . Win cooperation. 4 . The multi-angle processing jig for a bone plate according to claim 1 , wherein a rotating nut is welded to the front end of the screw rod. 5 . 5 . The multi-angle processing jig for a bone plate according to claim 1 , wherein lugs are provided at both ends of the base. 6 .

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