A bending tooling and a bending device

Abstract

The present invention provides a bending tooling and a bending device, including a bending cavity, a proximal positioning block, a connecting rod and a connecting rod fixing block; the bending cavity and the connecting rod fixing block are both installed on the installation back plate, the two ends of the connecting rod are rotatably connected with the connecting rod fixing block and the proximal positioning block, the proximal positioning block is used for positioning one end of the workpiece, and the limiting block is detachably installed on the bending cavity, and the limiting block is used for positioning the other end of the workpiece. The bending tooling and the bending device provided by the present invention have stress concentration points only at the bending part under stress, and other parts can rotate freely with the connecting rod without being restricted by force, which can avoid scratching the workpiece; and can realize bending of any part of the workpiece at various angles and arcs.

Description

Technical Field

[0001] The invention belongs to the technical field of tooling, and in particular relates to a bending tooling and a bending device. Background Art

[0002] In the medical industry, anatomical intramedullary nails will present various arcs and angles in different positions to adapt to the physiological curvature of human bones. The existing intramedullary nail bending process is mainly used to make molds, which are stamped and formed using hydraulic machine tools. Given the various specifications of intramedullary nails, each specification needs to be adapted to the mold, which requires the preparation of a large number of molds, taking up a lot of space, and pushing up the cost of each product. In addition, the mold is repeatedly tested from the beginning of the processing, which delays the time for new products to be launched. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a bending tool and a bending device, in which the stress concentration point is limited to the bending point, and the other parts can rotate freely with the connecting rod without being restrained by force, thereby avoiding strain on the workpiece; and can realize bending of various angles and arcs on any part of the workpiece.

[0004] In order to achieve the above object, the present invention provides the following technical solutions:

[0005] A bending tool comprises a bending cavity, a proximal positioning block, a connecting rod and a connecting rod fixing block; the bending cavity and the connecting rod fixing block are both installed on a mounting back plate, the two ends of the connecting rod are rotatably connected with the connecting rod fixing block and the proximal positioning block, the proximal positioning block is used to position one end of a workpiece, and a limit block is detachably installed on the bending cavity, and the limit block is used to position the other end of the workpiece.

[0006] Preferably, the proximal positioning block is connected to the connecting rod via a first rotating shaft, the connecting rod fixing block is connected to the connecting rod via a second rotating shaft, and the position at which the first rotating shaft is locked on the connecting rod is adjustable.

[0007] Preferably, the connecting rod is provided with a first groove and a second groove perpendicular to each other, the first groove and the second groove are both arranged along the length direction of the connecting rod, the first rotating shaft can be slidably adjusted in the first groove, and the locking screw passes through the second groove to lock the position of the first rotating shaft.

[0008] Preferably, the proximal positioning block comprises a positioning block, a positioning hole and a positioning cavity, the positioning cavity is arranged on the end face of the positioning block away from the connecting rod fixing block, and the positioning hole is transversely arranged to communicate with the positioning cavity.

[0009] Preferably, the above technical solution is such that the positions at which the connecting rod fixing block and the bending cavity are locked on the mounting back plate are adjustable.

[0010] Preferably, in the above technical solution, the bending cavity includes a base block and a plurality of first sliders. A chute is provided on the mounting back plate corresponding to the first slider. A threaded hole is provided on the first slider, and the base block is provided on the front side of the first slider.

[0011] Preferably, in the above technical solution, a cavity is provided in the middle of the front side of the base block, and positioning grooves are respectively provided on both sides of the front surface of the base block where the cavity is located.

[0012] Preferably, in the above technical solution, the limiting block is connected to the right end face of the positioning groove by a screw.

[0013] Preferably, in the above technical solution, the connecting rod fixing block includes a second slider and a connecting ear. A threaded hole is provided on the second slider. The second slider is arranged in the chute. The connecting ear is arranged on the front side of the second slider, and the connecting ear is rotatably connected to one end of the connecting rod.

[0014] The present invention also provides an intramedullary nail bender, including the bending tooling as described above.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] For the bending tooling and bending device provided by the present invention, both ends of the connecting rod are rotatably connected with a connecting rod fixing block and a proximal positioning block, so that the stress concentration point during bending is only subjected to force at the bending part, and other parts can rotate freely with the connecting rod, without being restricted by force and will not cause scratches to the workpiece;

[0017] For the bending tooling and bending device provided by the present invention, the front end can be positioned through the proximal positioning block, and the tail end can also be positioned through the limiting block, and the positioning method is flexible;

[0018] For the bending tooling and bending device provided by the present invention, the proximal positioning block can adjust its position on the connecting rod through the first rotating shaft, and has good adaptability to workpieces of different specifications;

[0019] For the bending tooling and bending device provided by the present invention, the positions where the connecting rod fixing block and the bending cavity are locked on the mounting back plate are adjustable, which is convenient for adjusting the bending position of the intramedullary nail and realizing bending at any position of the workpiece;

[0020] For the bending tooling and bending device provided by the present invention, it is easy to debug, and the bending point and radian have good stability and are easy to process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of the bending tooling provided by an embodiment of the present invention;

[0022] Figure 2It is the top view of the bending tooling provided by an embodiment of the present invention;

[0023] Figure 3 It is the front view of the bending tooling provided by an embodiment of the present invention;

[0024] Figure 4 It is the structural schematic diagram of the connecting rod provided by an embodiment of the present invention;

[0025] Figure 5 It is the structural schematic diagram of the proximal positioning block provided by an embodiment of the present invention;

[0026] Figure 6 It is the structural schematic diagram of the bending cavity provided by an embodiment of the present invention;

[0027] Figure 7 It is the structural schematic diagram of the connecting rod fixing block provided by an embodiment of the present invention.

[0028] Wherein:

[0029] 1. Bending cavity; 11. Base block; 12. First slider; 111. Cavity; 112. Positioning groove;

[0030] 2. Proximal positioning block; 21. First rotating shaft; 22. Positioning block; 23. Positioning hole; 24. Positioning cavity;

[0031] 3. Connecting rod; 31. First groove; 32. Second groove; 33. Locking screw;

[0032] 4. Connecting rod fixing block; 41. Second rotating shaft; 42. Second slider; 43. Connecting ear;

[0033] 5. Installation back plate; 51. Chute;

[0034] 6. Limiting block; 7. Intramedullary nail; 8. Pneumatic ejector rod. Detailed implementation manners

[0035] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0036] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0037] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

[0038] This embodiment provides a bending tooling, as Figures 1-7 shown, which includes a bending cavity 1, a proximal positioning block 2, a connecting rod 3, and a connecting rod fixing block 4; wherein the bending cavity 1 provides a working space for the pneumatic ejector rod 8 of the bending device to bend the workpiece; both the bending cavity 1 and the connecting rod fixing block 4 are mounted on the mounting backboard 5, and both ends of the connecting rod 3 are rotatably connected to the connecting rod fixing block 4 and the proximal positioning block 2, so that the stress concentration point during bending is only limited to the force on the bending part, and other parts can rotate freely with the connecting rod 3 without being restricted by force and will not cause damage to the workpiece; the proximal positioning block 2 is used to position one end of the workpiece; the limiting block 6 is detachably mounted on the bending cavity 1, and the limiting block 6 is used to position the other end of the workpiece. For the intramedullary nail 7 workpiece, the proximal positioning block 2 is used to position the proximal end of the intramedullary nail 7, and the limiting block 6 is used to position the distal end of the intramedullary nail 7.

[0039] Furthermore, the proximal positioning block 2 and the connecting rod 3 are connected by a first rotating shaft 21, the connecting rod fixing block 4 and the connecting rod 3 are connected by a second rotating shaft 41, and the position where the first rotating shaft 21 is locked on the connecting rod 3 is adjustable, which has good adaptability to workpieces of different specifications.

[0040] Further, a first groove 31 and a second groove 32 perpendicular to each other are provided on the connecting rod 3. Both the first groove 31 and the second groove 32 are arranged along the length direction of the connecting rod 3. The first rotating shaft 21 can slide and adjust within the first groove 31, and a locking screw 33 passes through the second groove 32 to lock the position of the first rotating shaft 21. Optionally, the first groove 31 penetrates through the upper surface and the lower surface of the connecting rod 3, and the second groove 32 is arranged on the rear surface of the connecting rod 3 and is communicated with the first groove 31.

[0041] Further, the proximal positioning block 2 includes a positioning block 22, a positioning hole 23, and a positioning cavity 24. When the workpiece is an intramedullary nail 7, the proximal end of the existing intramedullary nail 7 is provided with a U-shaped opening. To facilitate the proximal positioning of the intramedullary nail 7 and ensure the positioning stability; the positioning cavity 24 is arranged on the end surface of the positioning block 22 away from the connecting rod fixing block 4, and the positioning hole 23 is horizontally arranged and communicated with the positioning cavity 24. After the proximal end of the intramedullary nail 7 passes through the positioning hole 23, the U-shaped opening corresponds to the positioning cavity 24, and a positioning key is inserted into the positioning cavity 24 and the U-shaped opening to prevent the intramedullary nail 7 from rotating. Optionally, a connecting ear 43 is provided on the rear side of the positioning block 22 and is connected to the first rotating shaft 21.

[0042] Further, the positions where the connecting rod fixing block 4 and the bending cavity 1 are locked on the mounting back plate 5 are adjustable. By adjusting their positions, the bending position of the workpiece can be adjusted.

[0043] Specifically, the bending cavity 1 includes a base block 11 and a plurality of first sliders 12. A chute 51 corresponding to the first slider 12 is provided on the mounting back plate 5. A threaded hole is provided on the first slider 12, and the base block 11 is provided on the front side of the first slider 12. The first slider 12 slides to a suitable position within the chute 51, and a screw is used to install the first slider 12 within the chute 51 of the mounting back plate 5.

[0044] Further, a concave cavity 111 is provided in the middle of the front side of the base block 11, and positioning grooves 112 are respectively provided on both sides of the front surface of the base block 11 where the concave cavity 111 is located. The concave cavity 111 corresponds to the pneumatic ejector rod 8 of the bending device, and part of the workpiece is placed within the positioning grooves 112.

[0045] Optionally, the limiting block 6 is connected to the right end face of the positioning groove 112 by a screw. When it is necessary to position the distal end of the intramedullary nail 7, the limiting block 6 is installed on the base block 11 by a screw. When it is not necessary to position the distal end of the intramedullary nail 7, the screw is removed and the limiting block 6 is disassembled.

[0046] Further, the connecting rod fixing block 4 includes a second slider 42 and a connecting ear 43. A threaded hole is provided on the second slider 42. The second slider 42 is arranged in the chute 51. The second slider 42 slides to a proper position in the chute 51, and the second slider 42 is installed in the chute 51 of the installation back plate 5 by a screw. The connecting ear 43 is arranged on the front side of the second slider 42, and the connecting ear 43 is rotatably connected to one end of the connecting rod 3. In this embodiment, the connecting ear 43 is connected to the second rotating shaft 41.

[0047] This embodiment also provides an intramedullary nail 7 bender, which includes the bending tooling as described above.

[0048] The working process of this embodiment: Insert the proximal end of the intramedullary nail 7 into the positioning hole 23 of the proximal positioning block 2. There is a positioning concave cavity 24 at the front end of the positioning hole 23. Insert the U-shaped opening of the intramedullary nail and the positioning concave cavity 24 into the positioning key to play a role in preventing rotation. If distal positioning is to be achieved, the proximal positioning block 2 together with the intramedullary nail 7 can be pushed to the limiting block 6 to the right, and the intramedullary nail 7 is pressed into the positioning groove 112 and the concave cavity 111 of the bending concave cavity 1, and the pneumatic ejector rod 8 is used for bending. If proximal positioning is to be achieved, the proximal positioning block 2 together with the intramedullary nail 7 can be pushed to the limit to the left, and the intramedullary nail 7 is pressed into the positioning groove 112 and the concave cavity 111 of the bending concave cavity 1, and the pneumatic ejector rod 8 is used for bending; the pneumatic ejector rod 8 can be processed into a convex ejector rod with any arc, and can bend various sizes of arcs.

[0049] For the bending tooling and bending device provided by the present invention, the two ends of the connecting rod are rotatably connected with a connecting rod fixing block and a proximal positioning block, so that the stress concentration point during bending is only subjected to force at the bending part, and other parts can rotate freely with the connecting rod without being restricted by force and will not cause scratches to the workpiece;

[0050] For the bending tooling and bending device provided by the present invention, the front end can be positioned through the proximal positioning block, and the tail end can also be positioned through the limiting block, and the positioning method is flexible;

[0051] For the bending tooling and bending device provided by the present invention, the proximal positioning block can adjust its position on the connecting rod through the first rotating shaft, and has good adaptability to workpieces of different specifications;

[0052] For the bending tooling and bending device provided by the present invention, the positions where the connecting rod fixing block and the bending concave cavity are locked on the installation back plate are adjustable, which is convenient for adjusting the bending position of the intramedullary nail and realizing bending at any position of the workpiece;

[0053] For the bending tooling and bending device provided by the present invention, it is easy to debug, and the bending point and arc have good stability and are easy to process.

[0054] The above has described in detail an embodiment of the present invention, but the above content is only a preferred embodiment of the present invention and cannot be considered as defining the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of the application of the present invention shall still fall within the scope covered by the patent of the present invention.

Claims

1. A bending tooling, characterized in that: It includes a bending cavity, a proximal positioning block, a connecting rod and a connecting rod fixing block; the bending cavity and the connecting rod fixing block are both installed on the mounting backboard, both ends of the connecting rod are rotatably connected to the connecting rod fixing block and the proximal positioning block, the proximal positioning block is used for positioning one end of the workpiece, and the limiting block is detachably installed on the bending cavity, and the limiting block is used for positioning the other end of the workpiece; The proximal positioning block and the connecting rod are connected by a first rotating shaft, the connecting rod fixing block and the connecting rod are connected by a second rotating shaft, and the position where the first rotating shaft is locked on the connecting rod is adjustable; The connecting rod is provided with a first groove and a second groove perpendicular to each other, both the first groove and the second groove are arranged along the length direction of the connecting rod, the first rotating shaft can slide and adjust in the first groove, and the locking screw passes through the second groove to lock the position of the first rotating shaft; The proximal positioning block includes a positioning block, a positioning hole and a positioning cavity, the positioning cavity is arranged on the end face of the positioning block on the side away from the connecting rod fixing block, and the positioning hole is horizontally arranged and communicated with the positioning cavity; The positions where the connecting rod fixing block and the bending cavity are locked on the mounting backboard are adjustable; The bending cavity includes a base block and a plurality of first sliders, the mounting backboard is provided with a chute corresponding to the first slider, the first slider is provided with a threaded hole, and the base block is arranged on the front side of the first slider; The connecting rod fixing block includes a second slider and a connecting ear, the second slider is provided with a threaded hole, the second slider is arranged in the chute, the connecting ear is arranged on the front side of the second slider, and the connecting ear is rotatably connected to one end of the connecting rod.

2. The bending tooling according to claim 1, characterized in that: A cavity is arranged in the middle of the front side of the base block, and positioning grooves are respectively arranged on both sides of the front surface of the base block where the cavity is located.

3. The bending tooling according to claim 2, wherein: The limiting block is connected to the right end face of the positioning groove by a screw.

4. A bending device, characterized in that: It includes the bending tooling according to any one of claims 1-3.

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