3D printing equipment for surgical guide plate production

Abstract

The invention provides 3D printing equipment for surgical guide plate production, and relates to the technical field of 3D printing, the 3D printing equipment comprises a driven wheel rotationally connected to a moving table and a driving sleeve coaxially and fixedly mounted on the driven wheel, and at least six groups of side springs are mounted on the side wall of the driving sleeve at equal intervals; a plurality of rubber strips and internal springs are installed on every two adjacent side springs respectively, lateral holes with the number the same as that of the side springs are formed in the side wall of the driving sleeve, a unique multi-attaching driving mechanism is adopted, elastic supporting structures are evenly distributed on the driving sleeve, large-angle wrapping of material wires is achieved, and the service life of the material wires is prolonged. Particularly, due to the combined design of the side springs and the rubber strips, the pressure distribution can be automatically adjusted according to the change of the diameter of the material wire, the problem that the material wire is deformed or damaged due to single-point stress in traditional equipment is solved, and the printing quality is remarkably improved.

Description

Technical Field

[0001] The present invention relates to the field of 3D printing technology, and more specifically, to a 3D printing device for producing surgical guides. Background Art

[0002] In the field of medical device manufacturing, 3D printing technology for surgical guides has become an important support for precision medicine. However, the 3D printing equipment for surgical guides currently on the market has obvious deficiencies in the design of the filament delivery system. Traditional filament delivery mechanisms can usually only adapt to printing materials of a single specification. This fixed-specification design severely limits the application scope of the equipment. Especially in the production process of different types of surgical guides, filaments of different diameters are often required to meet different mechanical properties and biocompatibility requirements, but existing equipment cannot achieve rapid switching and adaptation.

[0003] This technical limitation not only increases the equipment procurement costs of medical institutions, but also affects production efficiency and product quality. Medical institutions must equip multiple printing devices for filaments of different specifications, which not only causes a waste of resources, but also increases the complexity of equipment maintenance and operator training. At the same time, in the actual production process, since it is impossible to flexibly select the most suitable filament specifications according to specific needs, it may affect the accuracy and performance of the final product, which is a major problem for the production of surgical guides that require precision. Summary of the invention

[0004] 1. Technical issues to be resolved In view of the problems existing in the prior art, the present invention provides a 3D printing device for producing surgical guides to solve the technical problems mentioned in the background technology.

[0005] (II) Technical solution To achieve the above-mentioned object, the present invention provides the following technical solution: a 3D printing device for producing surgical guides, comprising a printer body and a moving table cooperatively connected to the printer body; A fitting mechanism, comprising a driven wheel rotatably connected to the moving platform and a driving sleeve coaxially fixedly installed on the driven wheel, at least 6 groups of side springs are evenly installed on the side wall of the driving sleeve, a plurality of rubber strips and internal springs are respectively installed on each adjacent two side springs, the side wall of the driving sleeve is provided with lateral holes having the same number as the side springs, a support rod is slidably connected in each of the lateral holes, a receiving block is installed on one end of the support rod close to the side spring, and the receiving block fits on the side spring; and The adjustment mechanism includes an outer sleeve coaxially fixedly mounted on the driving sleeve, an adjustment rod slidably connected inside the outer sleeve, the adjustment rod is connected to the inner rod, a plurality of clamping rods are slidably connected to the side wall of the outer sleeve, a plurality of positioning strips are installed on the side of each clamping rod close to the adjustment rod, a plurality of positioning grooves are opened on the side wall of the adjustment rod, and the positioning strips are clamped in the positioning grooves.

[0006] Preferably, the fitting mechanism also includes an internal rod coaxially arranged with the driving sleeve, a plurality of follower grooves are evenly spaced on the side wall of the internal rod, and a plurality of follower balls are slidably connected in each of the follower grooves. The coaxial design of the internal rod and the driving sleeve ensures the stability of the movement, the evenly spaced distribution of the follower grooves provides uniform force points, and the sliding connection of the follower balls realizes a smooth adjustment process.

[0007] Preferably, a spring is mounted on each of the support rods, and the other side of the spring is connected to a follower rod slidably connected to the lateral hole, and the follower rod is connected to the follower ball.

[0008] Preferably, the adjustment mechanism also includes a side frame installed on the clamping rod, an adjustment sleeve is slidably connected in the side frame, pre-tightening rods are respectively installed at the upper and lower ends of the side frame, two-way balls are respectively installed on the pre-tightening rods, a plurality of expansion grooves are respectively opened on the upper and lower sides of the adjustment sleeve, and the two-way balls are slidably connected in the expansion grooves. This design realizes position control through the cooperation of the side frame and the adjustment sleeve, and the combination of the pre-tightening rod and the two-way ball provides two-way adjustment capability.

[0009] Preferably, each of the preload rods is respectively mounted with a preload spring, and a top ball is mounted on the preload spring, a transverse rod is mounted inside the top ball, and the transverse rod is coaxially slidably connected inside the preload rod, and the preload spring provides a continuous preload force.

[0010] Preferably, multiple synchronization sleeves are installed at equal intervals on the side wall of the adjustment sleeve, and a synchronization rod is slidably connected to each synchronization sleeve. A positioning spring is sleeved on the synchronization rod, and multiple positioning springs are respectively connected to the synchronization sleeve. The cooperation between the synchronization sleeve and the synchronization rod realizes the coordinated movement of various components, and the setting of the positioning spring provides the necessary return force to ensure the stability of positioning.

[0011] Preferably, positioning plates are respectively installed on the multiple synchronization rods, and a fixed plate is installed on the external sleeve. The positioning plate and the fixed plate are coaxially arranged. The coaxial design of the positioning plate and the fixed plate ensures the accuracy of positioning, and the cooperation of the multiple synchronization rods provides stable supporting force.

[0012] Preferably, a plurality of positioning rods are installed on a side of the positioning plate away from the synchronization rod, a plurality of positioning holes are opened on the fixing plate at equal intervals, the positioning holes are inserted into the positioning holes, and the cooperation between the positioning rods and the positioning holes realizes angular positioning.

[0013] Preferably, a motor is fixedly mounted on the mobile platform, a driving shaft is rotatably mounted inside the motor, a driving wheel is fixedly mounted on the driving shaft, the driving wheel is meshed with the driven wheel, and a pressure block is rotatably mounted on the driving shaft, a fitting wheel is rotatably mounted on the pressure block, a top spring is mounted on the mobile platform, the top spring abuts against the side wall of the pressure block, this transmission chain design achieves stable power output through motor drive, the meshing of the driving wheel and the driven wheel ensures the reliability of transmission, and the combination of the pressure block and the fitting wheel provides adaptive pressure adjustment.

[0014] Preferably, a material wire is slidably mounted on the movable platform, and a nozzle is mounted on the movable platform, the material wire is respectively attached to the attaching wheel and the plurality of rubber strips, and the material wire is slidably connected to the nozzle.

[0015] (III) Beneficial effects Compared with the prior art, the present invention provides a 3D printing device for producing surgical guides, which has the following beneficial effects: The equipment adopts a unique multi-fit drive mechanism and an evenly distributed elastic support structure on the drive sleeve, which achieves a large-angle wrapping of the filament. In particular, the combined design of the side spring and rubber strip can automatically adjust the pressure distribution according to the change of the filament diameter, avoiding the deformation or damage of the filament caused by single-point force in traditional equipment, and significantly improving the printing quality.

[0016] The equipment adopts a multiple positioning and locking design. Through the cooperation between the external sleeve and the adjusting rod, combined with the locking mechanism of the clamping rod and the positioning strip, precise control of the adjustment position is achieved. In particular, the design of the pre-tightening structure ensures the stability and reliability of the adjustment process through the cooperation of the two-way ball and the expansion groove. The setting of the synchronization mechanism further ensures the coordinated movement of each adjustment component and avoids jamming during the adjustment process.

[0017] The equipment realizes the functions of fast switching and automatic adaptation. Through simple adjustment operations, it can adapt to wires of different diameters without replacing parts or performing complicated debugging. This design not only improves the versatility of the equipment, but also significantly reduces the cost of use and maintenance difficulty. The setting of multiple protection mechanisms ensures the safety and reliability of the adjustment process and effectively avoids the risks caused by misoperation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of a 3D printing device for producing surgical guides in the present invention; Figure 2 It is a schematic diagram of the structure of the motor and the moving platform in the present invention; Figure 3 It is a schematic diagram of the structure of the driving sleeve and the side spring in the present invention; Figure 4 It is a schematic cross-sectional structural diagram of the driving sleeve in the present invention; Figure 5 It is a schematic cross-sectional structure diagram of the adjusting rod in the present invention; Figure 6 It is a schematic diagram of the structure of the outer sleeve and the adjusting rod in the present invention; Figure 7 It is a schematic cross-sectional structural diagram of the fixing disk and the outer sleeve in the present invention; Figure 8 It is a schematic diagram of the structure of the adjustment sleeve and the clamping rod in the present invention; Fig. 9 It is a schematic diagram of the structure of the positioning plate and the synchronization rod in the present invention.

[0019] In the figure: 11, printer body; 12, moving platform; 21, driven wheel; 22, driving sleeve; 23, side spring; 24, rubber strip; 25, internal spring; 26, side hole; 27, support rod; 28, receiving block; 29, follower groove; 31, external sleeve; 32, adjustment rod; 33, internal rod; 34, clamping rod; 35, positioning strip; 36, positioning groove; 37, side frame; 38, adjustment sleeve; 39, preload rod; 41, motor; 42, driving shaft ; 43. driving wheel; 44. pressure block; 45. fitting wheel; 46. top spring; 47. wire; 48. nozzle; 210. follower ball; 211. spring; 212. follower rod; 310. two-way ball; 311. expansion groove; 312. preload spring; 313. top ball; 314. transverse rod; 315. synchronous sleeve; 316. synchronous rod; 317. positioning spring; 318. positioning plate; 319. fixed plate; 320. positioning rod; 321. positioning hole. DETAILED DESCRIPTION

[0020] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0021] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0022] In the present invention, unless otherwise specified, the directions used, such as "up" and "down", usually refer to the directions shown in the drawings, or to the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directions are not used to limit the present invention.

[0023] See also Figures 1 to 9 A 3D printing device for producing surgical guides includes a printer body 11 and a moving platform 12 connected to the printer body 11, a motor 41 is fixedly installed on the moving platform 12, a driving shaft 42 is rotatably installed in the motor 41, a driving wheel 43 is fixedly installed on the driving shaft 42, the driving wheel 43 is meshed with the driven wheel 21, and a pressing block 44 is rotatably installed on the driving shaft 42, a bonding wheel 45 is rotatably installed on the pressing block 44, a top spring 46 is installed on the moving platform 12, the top spring 46 abuts against the side wall of the pressing block 44, a material wire 47 is slidably installed on the moving platform 12, and a nozzle 48 is installed on the moving platform 12, the material wire 47 is respectively bonded to the bonding wheel 45 and a plurality of rubber strips 24, and the material wire 47 is slidably connected in the nozzle 48, and the bonding mechanism includes a driven wheel 21 rotatably connected to the moving platform 12 and a driving sleeve coaxially fixedly installed on the driven wheel 21 22. No less than 6 groups of side springs 23 are evenly spaced on the side wall of the driving sleeve 22, and a plurality of rubber strips 24 and an internal spring 25 are respectively installed on each adjacent two side springs 23. The side wall of the driving sleeve 22 is provided with lateral holes 26 with the same number as the side springs 23, and a support rod 27 is slidably connected in each lateral hole 26. A receiving block 28 is installed at one end of the support rod 27 close to the side spring 23, and the receiving block 28 is fitted on the side spring 23. The fitting mechanism also includes an internal rod 33 which is coaxially arranged with the driving sleeve 22. A plurality of follower grooves 29 are evenly spaced on the side wall of the internal rod 33, and a plurality of follower balls 210 are slidably connected in each follower groove 29. A spring 211 is respectively installed on each support rod 27, and the other side of the spring 211 is connected to a follower rod 212 slidably connected in the lateral hole 26, and the follower rod 212 is connected to the follower ball 210.

[0024] When printing the surgical guide, the motor 41 is first used to drive the driving wheel 43 to rotate. Since the driving wheel 43 is engaged with the driven wheel 21, the driving sleeve 22 is driven to rotate accordingly. Since a plurality of side springs 23 are installed on the side wall of the driving sleeve 22, and the rubber strips 24 on the side springs 23 are in contact with the material wire 47, the plurality of rubber strips 24 are pressed on the material wire 47. As the diameter of the material wire 47 increases, the side springs 23 at the corresponding positions are deformed, thereby ensuring the effective fitting of the rubber strips 24. Then the support rod 27 is in The receiving block 28 has different supporting forces at different positions, so the deformation degree of the side spring 23 can be changed, and the fitting wheel 45 fits on the other end of the filament 47, and the top spring 46 presses on the pressure block 44, and the pressure block 44 is rotatably connected to the drive shaft 42 and is in a limited state, so it will apply sufficient pre-tightening force to the filament 47, and will not generate a large pressure at a single position, thereby ensuring that the surface of the filament 47 will not produce large scratches due to the driving force, and then the printing process is carried out through the movable table 12.

[0025] When the position of the support rod 27 needs to be adjusted for different wires 47, first change the position of the adjusting rod 32 and then fix the adjusting rod 32. At this time, the internal rod 33 will move with the movement of the adjusting rod 32. Since a plurality of follower grooves 29 are provided on the side wall of the internal rod 33, a plurality of follower balls 210 will expand or contract with the groove position of the follower groove 29. Since the position of the adjusting rod 32 is fixed, the position of the internal rod 33 can also be fixed at the corresponding position, thereby ensuring that the expansion or contraction position of the support rod 27 is fixed. Then the position of the follower rod 212 is adjusted, so the receiving block 28 on the support rod 27 is also adjusted accordingly, thereby adjusting the support position of the side spring 23 and completing the adjustment process.

[0026] See also Figures 6 to 9The adjusting mechanism comprises an outer sleeve 31 coaxially fixedly mounted on the driving sleeve 22, an adjusting rod 32 being slidably connected in the outer sleeve 31, the adjusting rod 32 being connected to the inner rod 33, a plurality of clamping rods 34 being slidably connected to the side wall of the outer sleeve 31, a plurality of positioning strips 35 being mounted on the side of each clamping rod 34 close to the adjusting rod 32, a plurality of positioning grooves 36 being provided on the side wall of the adjusting rod 32, the positioning strips 35 being stuck in the positioning grooves 36, the adjusting mechanism further comprises a side frame 37 mounted on the clamping rod 34, an adjusting sleeve 38 being slidably connected in the side frame 37, pre-tightening rods 39 being respectively mounted at the upper and lower ends of the side frame 37, two-way balls 310 being respectively mounted on the pre-tightening rod 39, a plurality of expansion grooves 311 being respectively provided on the upper and lower sides of the adjusting sleeve 38, the two-way balls 310 being slidably connected in the expansion grooves 311, and a plurality of expansion grooves 311 being respectively provided on each pre-tightening rod 39 A preload spring 312 is installed, and a top ball 313 is installed on the preload spring 312. A transverse rod 314 is installed in the top ball 313. The transverse rod 314 is coaxially slidably connected in the preload rod 39. A plurality of synchronous sleeves 315 are evenly spaced on the side wall of the adjustment sleeve 38. A synchronous rod 316 is slidably connected in each synchronous sleeve 315. A positioning spring 317 is sleeved and installed on the synchronous rod 316. A plurality of positioning springs 317 are respectively connected to the synchronous sleeve 315. Positioning plates 318 are respectively installed on the plurality of synchronous rods 316. A fixed plate 319 is installed on the outer sleeve 31. The positioning plate 318 and the fixed plate 319 are coaxially arranged. A plurality of positioning rods 320 are installed on the side of the positioning plate 318 away from the synchronous rod 316. A plurality of positioning holes 321 are evenly spaced on the fixed plate 319, and the positioning holes 321 are inserted into the positioning holes 321.

[0027] When the position of the adjusting rod 32 needs to be changed, the positioning plate 318 is first pushed downward to release the connection between the positioning rod 320 and the positioning hole 321. Then, the adjusting sleeve 38 can be driven to rotate. Since the two-way ball 310 is slidably connected in the expansion grooves 311 on both sides, the side frame 37 can be driven to expand or contract outward. When it needs to be released for adjustment, the positioning strip 35 on the clamping rod 34 is first released from the connection with the positioning groove 36. At this time, the hard connection between the two is released, and under the action of the preload spring 312, the top ball 313 is still pressed against multiple positioning grooves 36, thereby applying the preload force. Then, the adjusting rod 32 can be driven to move, thereby completing the adjustment of the position of the support rod 27.

[0028] When the adjustment is completed, the adjustment sleeve 38 is rotated in the opposite direction, and then the clamping rod 34 shrinks inward along with the expansion groove 311 until the positioning bar 35 is clamped in the positioning groove 36, thereby completing the clamping and fixing process. Since the synchronization rod 316 is always slidably connected in the synchronization sleeve 315, it will slide accordingly, and then the positioning plate 318 is released, and the positioning rod 320 is inserted into the corresponding positioning hole 321 under the action of the positioning spring 317, thereby completing the adjustment process. At this time, it can be adjusted according to different diameters of the wire 47, and then the stability of drives with different diameters can be adapted.

[0029] In all the schemes mentioned above, the connection between two parts can be selected according to actual conditions by welding, bolt and nut matching connection, bolt or screw connection or other well-known connection methods, which will not be described one by one here. In the above, all fixed connections are preferably welded. Although the embodiments of the present invention have been shown and described, it can be understood by ordinary technicians in this field that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A 3D printing device for producing surgical guides, comprising a printer body (11) and a moving table (12) connected to the printer body (11); The laminating mechanism is characterized by: It comprises a driven wheel (21) rotatably connected to the moving platform (12) and a driving sleeve (22) coaxially fixedly mounted on the driven wheel (21), at least 6 groups of side springs (23) being evenly spaced and mounted on the side wall of the driving sleeve (22), a plurality of rubber strips (24) and internal springs (25) being mounted on each adjacent two side springs (23), the side wall of the driving sleeve (22) being provided with the same number of side holes (26) as the side springs (23), a support rod (27) being slidably connected in each of the side holes (26), a receiving block (28) being mounted on one end of the support rod (27) close to the side spring (23), the receiving block (28) being fitted on the side spring (23); as well as The adjustment mechanism comprises an outer sleeve (31) coaxially fixedly mounted on the driving sleeve (22), an adjustment rod (32) being slidably connected inside the outer sleeve (31), the adjustment rod (32) being connected to the inner rod (33), a plurality of clamping rods (34) being slidably connected to the side wall of the outer sleeve (31), a plurality of positioning strips (35) being mounted on a side of each clamping rod (34) close to the adjustment rod (32), a plurality of positioning grooves (36) being formed on the side wall of the adjustment rod (32), and the positioning strips (35) being clamped in the positioning grooves (36).

2. According to claim 1, a 3D printing device for producing surgical guides is characterized in that: The fitting mechanism further comprises an inner rod (33) coaxially arranged with the driving sleeve (22), a plurality of follower grooves (29) being formed at equal intervals on a side wall of the inner rod (33), and a plurality of follower balls (210) being slidably connected in each of the follower grooves (29).

3. The 3D printing device for producing surgical guides according to claim 2, characterized in that: A spring (211) is mounted on each of the support rods (27), and the other side of the spring (211) is connected to a follower rod (212) slidably connected to the lateral hole (26), and the follower rod (212) is connected to the follower ball (210).

4. The 3D printing device for producing surgical guides according to claim 1, characterized in that: The adjustment mechanism further comprises a side frame (37) mounted on the clamping rod (34), an adjustment sleeve (38) being slidably connected inside the side frame (37), preload rods (39) being respectively mounted on the upper and lower ends of the side frame (37), two-way balls (310) being respectively mounted on the preload rods (39), a plurality of expansion grooves (311) being respectively formed on the upper and lower sides of the adjustment sleeve (38), and the two-way balls (310) being slidably connected inside the expansion grooves (311).

5. A 3D printing device for producing surgical guides according to claim 4, characterized in that: each The preload rods (39) are respectively mounted with preload springs (312), and the preload springs (312) are mounted with top balls (313), and the top balls (313) are mounted with transverse rods (314), and the transverse rods (314) are coaxially slidably connected to the preload rods (39).

6. The 3D printing device for producing surgical guides according to claim 5, characterized in that: A plurality of synchronous sleeves (315) are installed at equal intervals on the side wall of the adjustment sleeve (38), a synchronous rod (316) is slidably connected in each of the synchronous sleeves (315), a positioning spring (317) is sleeved and installed on the synchronous rod (316), and the plurality of positioning springs (317) are respectively connected to the synchronous sleeves (315).

7. A 3D printing device for producing surgical guides according to claim 6, characterized in that: Positioning plates (318) are respectively mounted on the plurality of synchronization rods (316), and a fixing plate (319) is mounted on the outer sleeve (31), wherein the positioning plates (318) and the fixing plates (319) are coaxially arranged.

8. The 3D printing device for producing surgical guides according to claim 7, characterized in that: A plurality of positioning rods (320) are installed on a side of the positioning plate (318) away from the synchronization rod (316), and a plurality of positioning holes (321) are formed at equal intervals on the fixing plate (319), and the positioning holes (321) are inserted into the positioning holes (321).

9. The 3D printing device for producing surgical guides according to claim 1, characterized in that: A motor (41) is fixedly mounted on the movable platform (12), a driving shaft (42) is rotatably mounted inside the motor (41), a driving wheel (43) is fixedly mounted on the driving shaft (42), the driving wheel (43) is meshed with the driven wheel (21), a pressing block (44) is rotatably mounted on the driving shaft (42), a fitting wheel (45) is rotatably mounted on the pressing block (44), a top spring (46) is mounted on the movable platform (12), and the top spring (46) abuts against a side wall of the pressing block (44).

10. The 3D printing device for producing surgical guides according to claim 9, characterized in that: A material thread (47) is slidably mounted on the movable platform (12), and a nozzle (48) is mounted on the movable platform (12). The material thread (47) is respectively attached to the attaching wheel (45) and the plurality of rubber strips (24), and the material thread (47) is slidably connected to the nozzle (48).

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