3D printing wire feeding device

Abstract

A 3D printing wire feeding device comprises a box body, a partition plate is fixedly connected into the box body, a driving motor is installed on the outer wall of the rear side of the box body, an output shaft of the driving motor penetrates through the rear side wall of the box body and is fixedly connected with a transmission shaft, and the other end of the transmission shaft rotationally penetrates through the partition plate and is fixedly connected with a wire feeding shaft. Compared with the prior art, the wire feeding shaft has the advantages that the wire feeding shaft can flexibly adapt to wire trays with various hole diameters through the arranged tight supporting mechanism, and the limitation that in the prior art, due to the fact that the hole diameters are not matched, the wire feeding shaft cannot be used is overcome. The universality of the device is remarkably improved through the design; the distance between the fixed wire feeding wheel and the movable wire feeding wheel can be flexibly adjusted according to wires of different diameters through the arranged through groove, the arranged inner threaded sleeve, the arranged screw rod, the arranged hand wheel and the arranged lifting block, so that the device can adapt to the wires of various specifications, and after adjustment, under the action of the automatic tensioning mechanism, the wire feeding efficiency is improved. And the driving belt can drive the driving wheel, the driven wheel and the tensioning wheel to normally drive.

Description

TECHNICAL FIELD

[0001] The utility model relates to 3D printing technical field especially relates to a 3D printing wire material wire feeding device. BACKGROUND

[0002] 3D printing is also called additive manufacturing technology, which is a kind of technology for manufacturing solid parts according to three-dimensional CAD data through layer-by-layer material accumulation. The wire feeding device is a key component in the 3D printer, mainly responsible for feeding the wire from the bobbin into the hot end for melting and extrusion.

[0003] The Chinese patent with publication number CN213317689U discloses a metal 3D printing wire material wire feeding device, which comprises a first box body, a second box body fixedly installed at the bottom of the first box body, a rotating shaft arranged in the first box body, a wire material disc arranged on the rotating shaft, a fixed plate fixedly installed in the first box body through a sliding mechanism, a circular column fixedly installed on the fixed plate through an extension rod, a groove formed in the first box body, a threaded rod arranged in the groove, a hand wheel fixedly connected to one end of the threaded rod, a threaded sleeve threadedly connected to the threaded rod, a driving pressing shaft and a driven pressing shaft arranged in the first box body, a servo motor fixedly installed in the second box body, an output end of the servo motor fixedly connected to the driving pressing shaft through a shaft coupling, the rotating shaft, the driving pressing shaft and the driven pressing shaft all being drivingly connected through a transmission mechanism, and a wire outlet formed in the first box body.

[0004] In the existing 3D printing technology, the wire feeding mode of the wire material is usually realized by rotating the hole in the center of the wire material disc around the wire feeding shaft. Specifically, the central hole of the wire material disc is matched with the wire feeding shaft, and the wire material disc is rotated by the rotation of the wire feeding shaft, so as to realize the conveying of the wire material. However, this traditional method has obvious shortcomings: the diameters of the central holes of different wire material discs are often inconsistent, and if the diameter of the central hole of the wire material disc does not match the wire feeding shaft, the wire feeding device cannot be used normally, which greatly limits the applicability of the wire feeding device. In addition, as in the above-mentioned wire feeding device, the positions of the driving pressing shaft and the driven pressing shaft are fixed. Although this design is simple in structure, it also has significant shortcomings. Since the gap between the two shafts is fixed, this wire feeding device can only be applied to wire materials of a specific diameter. When different diameter wire materials need to be used, the device cannot be flexibly adjusted, resulting in poor wire feeding effect and even unable to work normally. UTILITY MODEL CONTENTS

[0005] The main purpose of the utility model is to provide a 3D printing wire material wire feeding device, which can effectively solve the problems in the background art.

[0006] In order to achieve the above object, the utility model takes the technical scheme for: a 3D printing wire material wire feeding device, including the box, the box is fixedly connected with the baffle in, the rear side outer wall of the box is installed with the drive motor, the output shaft of drive motor passes through the rear side wall of the box and is fixedly connected with the transmission shaft, the other end of transmission shaft rotates and passes through the baffle and is fixedly connected with the wire feeding shaft, the transmission shaft is fixedly provided with the driving wheel, the front side wall of baffle is rotatably provided with the fixed wire feeding wheel, the baffle is provided with the through slot, the through slot is slidably provided with the lifting block, the upper side wall of the box is embedded with the internal thread sleeve, the internal thread sleeve is screw threadedly connected with the screw rod, the lower end of screw rod extends into the through slot and is rotatably connected with the lifting block, the upper end of screw rod is fixedly connected with the hand wheel, the rear side inner wall of the box is provided with the first sliding slot, the first sliding slot is slidably provided with the first sliding block, the front side wall of first sliding block is rotatably provided with the rotating shaft, the front end of rotating shaft rotates and passes through the lifting block and is fixedly connected with the movable wire feeding wheel, the rotating shaft is fixedly provided with the driven wheel, the wire feeding shaft is provided with the bracing mechanism, and the rear side inner wall between the baffle and the box is provided with an automatic tensioning mechanism.

[0007] As a further description of the above technical scheme, the bracing mechanism includes a bracing plate, an inflatable air bag, a flow divider, a flow divider cavity, an air cavity, a piston, a push rod, a U-shaped adapter rod, a return spring and a connecting pipe, the outer side of the wire feeding shaft is provided with four bracing plates, the front side outer wall of the wire feeding shaft is provided with an inflatable air bag, the wire feeding shaft is fixedly connected with a flow divider, the flow divider has a flow divider cavity therein, the flow divider further has four air cavities therein which are in communication with the flow divider cavity, the air cavity is provided with a piston, the side wall of the piston away from the flow divider cavity is fixedly connected with a push rod, the other end of the push rod extends to the outer side of the flow divider and is fixedly connected with a U-shaped adapter rod, the two ends of the U-shaped adapter rod extend to the outer side of the wire feeding shaft and are fixedly connected with the bracing plates, the side wall of the piston away from the flow divider cavity and the air cavity are further provided with a return spring, and the inflatable air bag and the flow divider cavity are in communication through a connecting pipe.

[0008] As a further description of the above technical scheme, the automatic tensioning mechanism includes a second sliding slot, a second sliding block, a tensioning wheel and a tensioning spring, the rear side wall of the baffle and the rear side inner wall of the box are both provided with a second sliding slot, the second sliding slot is slidably provided with a second sliding block, and a tensioning wheel is rotatably arranged between the two second sliding blocks, and a tensioning spring is arranged between the second sliding block and the upper side wall of the second sliding slot.

[0009] As a further description of the above technical scheme, the inflatable air bag is provided with a pressure relief cap.

[0010] As a further description of the above technical scheme, the driving wheel, the driven wheel and the tensioning wheel are provided with a transmission belt therearound.

[0011] As a further description of the above technical solutions, the front side wall of the box is provided with a box door.

[0012] As a further description of the above technical solutions, the side wall of the box has a wire outlet.

[0013] Compared with the prior art, the utility model has the advantages of:

[0014] 1. By setting the tensioning mechanism, the wire feeding shaft can flexibly adapt to wire material discs of various hole diameters, overcoming the limitations of the prior art due to mismatched hole diameters. This design significantly improves the versatility of the device.

[0015] 2. By setting the through slot, internal thread sleeve, screw rod, hand wheel and lifting block, the distance between the fixed wire feeding wheel and the movable wire feeding wheel can be flexibly adjusted according to wire materials of different diameters, so that it can adapt to wire materials of various specifications, and after adjustment, under the action of the automatic tensioning mechanism, it ensures that the transmission belt can normally drive the driving wheel, driven wheel and tensioning wheel. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a whole structure schematic view of the 3D printing wire material wire feeding device of the utility model;

[0017] Figure 2 It is a through slot structure schematic view of the 3D printing wire material wire feeding device of the utility model;

[0018] Figure 3 It is a transmission shaft structure schematic view of the 3D printing wire material wire feeding device of the utility model;

[0019] Figure 4 It is a wire feeding shaft structure schematic view of the 3D printing wire material wire feeding device of the utility model;

[0020] Figure 5 It is a wire feeding shaft internal structure schematic view of the 3D printing wire material wire feeding device of the utility model;

[0021] Figure 6 It is a wire feeding shaft sectional view of the 3D printing wire material wire feeding device of the utility model;

[0022] Figure 7 It is an automatic tensioning mechanism structure schematic view of the 3D printing wire material wire feeding device of the utility model;

[0023] In the figure: 1, box; 2, partition; 3, drive motor; 31, transmission shaft; 32, wire feeding shaft; 33, driving wheel; 21, fixed wire feeding wheel; 22, through slot; 23, lifting block; 4, internal thread sleeve; 41, screw rod; 42, hand wheel; 5, first sliding groove; 51, first sliding block; 6, rotating shaft; 61, movable wire feeding wheel; 62, driven wheel; 7, tensioning mechanism; 8, automatic tensioning mechanism; 71, tensioning plate; 72, inflatable air bag; 73, flow dividing block; 74, air cavity; 75, piston; 76, push rod; 77, U-shaped adapter rod; 78, return spring; 79, connecting pipe; 81, second sliding groove; 82, second sliding block; 83, tensioning wheel; 84, tensioning spring; 721, pressure relief cap; 9, transmission belt; 11, box door. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features and purposes achieved by the utility model easy to understand, the utility model is further described below in combination with specific embodiments.

[0025] In the description of the utility model, it should be pointed out that the directions or position relationships indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end" and "another end" are based on the directions or position relationships shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements indicated must have a particular direction, be constructed and operated in a particular direction, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0026] In the description of the utility model, it should be pointed out that unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "connection" and the like should be understood broadly, for example, "connection" can be fixed connection, can also be detachable connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication between two elements. For ordinary skilled persons in the art, the specific meanings of the above terms in the utility model can be understood according to the specific circumstances.

[0027] Please refer to Figures 1-7The utility model provides a kind of 3D printing wire material wire feeding device, including box 1, baffle 2 is fixedly connected in box 1, driving motor 3 is installed on the rear side outer wall of box 1, the output of driving motor 3 can drive transmission shaft 31 and wire feeding shaft 32 rotation, transmission shaft 31 can drive driving wheel 33 rotation when rotating, under the driving of transmission belt 9, driving wheel 33 rotation can drive driven wheel 62 and tension pulley 83 rotation, transmission wheel 62 rotation drives pivot 6 rotation, further make pivot 6 drive movable wire feeding wheel 61 rotation and send wire, the output shaft of driving motor 3 passes through the rear side wall of box 1 and is fixedly connected with transmission shaft 31, another end of transmission shaft 31 rotation passes through baffle 2 and is fixedly connected with wire feeding shaft 32, driving wheel 33 is fixedly sleeved on transmission shaft 31, fixed wire feeding wheel 21 is rotationally arranged on the front side wall of baffle 2, through groove 22 is set on baffle 2, lifting block 23 is slidably arranged in through groove 22, internal thread sleeve 4 is embedded on the upper side wall of box 1, screw rod 41 is screw-threadedly connected in internal thread sleeve 4, the lower end of screw rod 41 extends into through groove 22 and is rotationally connected with lifting block 23, hand wheel 42 is fixedly connected to the upper end of screw rod 41, first sliding slot 5 is formed on the rear side inner wall of box 1, first sliding block 51 is slidably arranged in first sliding slot 5, pivot 6 is rotationally arranged on the front side wall of first sliding block 51, pivot 6 is rotationally connected with movable wire feeding wheel 61, by rotating hand wheel 42 drives screw rod 41 rotation, screw rod 41 rotates under the action of internal thread sleeve 4 and can drive lifting block 23 moves up and down, lifting block 23 moves can drive pivot 6, first sliding block 51 and movable wire feeding wheel 61 move, so that the interval between movable wire feeding wheel 61 and fixed wire feeding wheel 21 can be changed, according to the flexible adjustment of movable wire feeding wheel 61 of different diameter wire material, so as to adapt to multiple specifications of wire material, pivot 6 is fixedly sleeved with driven wheel 62, wire feeding shaft 32 is equipped with bracing mechanism 7, automatic tensioning mechanism 8 is arranged between baffle 2 and the rear side inner wall of box 1.

[0028] Specifically, as Figures 4 to 6As shown in the figure, a kind of 3D printing wire feeding device, bracing mechanism 7 includes bracing plate 71, inflatable air bag 72, shunt block 73, shunt cavity, air cavity 74, piston 75, push rod 76, U-shaped adapter rod 77, reset spring 78 and connecting pipe 79, the outside of feeding shaft 32 is provided with four bracing plates 71, inflatable air bag 72 is installed on the front side outer wall of feeding shaft 32, shunt block 73 is fixedly connected in feeding shaft 32, shunt block 73 has shunt cavity, four air cavities 74 are also annularly arranged in shunt block 73 and connected with shunt cavity, piston 75 is arranged in air cavity 74, push rod 76 is fixedly connected to the side wall of piston 75 away from shunt cavity, the other end of push rod 76 extends to the outside of shunt block 73 and is fixedly connected with U-shaped adapter rod 77, the two ends of U-shaped adapter rod 77 extend to the outside of feeding shaft 32 and are fixedly connected with bracing plate 71, reset spring 78 is also arranged between the side wall of piston 75 away from shunt cavity and air cavity 74, inflatable air bag 72 and shunt cavity are communicated through connecting pipe 79, the wire material disc is sleeved on the feeding shaft 32, the inflatable air bag 72 is pressed, the inflatable air bag 72 is inflated into shunt cavity through connecting pipe 79, air enters into four air cavities 74 through shunt cavity, piston 75 is pushed to move, piston 75 moves to drive push rod 76 to move, push rod 76 moves to make U-shaped adapter rod 77 push bracing plate 71 to move, so that bracing plate 71 tightens the center hole of wire material disc, so that the wire material disc can be rotated to feed wire when the feeding shaft 32 rotates, so that the feeding shaft 32 can flexibly adapt to wire material discs of various diameters.

[0029] Specifically, as shown in the figure, Figure 7 A kind of 3D printing wire feeding device, automatic tensioning mechanism 8 includes second sliding groove 81, second sliding block 82, tensioning wheel 83 and tensioning spring 84, second sliding groove 81 is formed in the rear side wall of partition 2 and the rear side inner wall of box 1, second sliding block 82 is slidably arranged in second sliding groove 81, tensioning wheel 83 is rotatably arranged between the two second sliding blocks 82, tensioning spring 84 is arranged between second sliding block 82 and the upper side wall of second sliding groove 81, during the adjustment of movable feed wheel 61, driven wheel 62 will move with rotating shaft 6, at this time, under the pushing of tensioning spring 84, second sliding block 82 drives tensioning wheel 83 to slide along second sliding groove 81, so that tensioning wheel 83 is always pressed against transmission belt 9, so that transmission belt 9 maintains tension, to ensure the normal transmission between driving wheel 33, driven wheel 62 and tensioning wheel 83.

[0030] Specifically, as shown in the figure, Figure 4 A kind of 3D printing wire feeding device, pressure relief cap 721 is arranged on inflatable air bag 72, pressure relief can be carried out after opening pressure relief cap 721, so that bracing plate 71 resets.

[0031] Specifically, as shown in the figure, Figure 7As shown in the figure, a kind of 3D printing wire feeding device, transmission belt 9 is wound between driving wheel 33, driven wheel 62 and tension pulley 83, and driving wheel 33, driven wheel 62 and tension pulley 83 are driven by transmission belt 9.

[0032] Specifically, as shown in the figure, Figure 1 As shown in the figure, a kind of 3D printing wire feeding device, the front side wall of box body 1 is provided with box door 11, and the replacement of wire disc can be carried out after opening box door 11.

[0033] Specifically, as shown in the figure, Figure 1 As shown in the figure, a kind of 3D printing wire feeding device, the side wall of box body 1 has wire outlet, and wire is sent out of box body 1 through wire outlet.

[0034] It should be noted that the utility model is a kind of 3D printing wire feeding device, when using, by rotating hand wheel 42, screw rod 41 is rotated, and screw rod 41 can drive lifting block 23 to move up and down under the action of internal thread sleeve 4, lifting block 23 moves to drive shaft 6, first sliding block 51 and movable wire feeding wheel 61 move, so that the distance between movable wire feeding wheel 61 and fixed wire feeding wheel 21 can be changed, and movable wire feeding wheel 61 is flexibly adjusted according to wire of different diameters, so that it can adapt to a variety of specifications of wire, during the process of adjusting movable wire feeding wheel 61, driven wheel 62 moves along with rotating shaft 6, at this time, under the push of tension spring 84, second sliding block 82 drives tension pulley 83 to slide along second sliding groove 81, so that tension pulley 83 is pressed tightly at any time transmission belt 9, so that transmission belt 9 maintains tension, ensure the normal transmission between driving wheel 33, driven wheel 62 and tension pulley 83, when installing wire disc, wire disc is sleeved on wire feeding shaft 32, then pressurized air bag 72, pressurized air bag 72 is inflated in shunt cavity by connecting pipe 79, air enters four air chambers 74 by shunt cavity, pushes piston 75 to move, piston 75 moves to drive push rod 76 to move, push rod 76 moves can make U-shaped adapter rod 77 push supporting plate 71 to move, so that supporting plate 71 supports the center hole of wire disc, so that wire disc is rotated and fed when wire feeding shaft 32 rotates, so that wire feeding shaft 32 can flexibly adapt to wire disc of various aperture, when disassembling wire disc, unscrew the pressure relief cap 721 on pressurized air bag 72 to release pressure, after pressure relief, piston 75 is reset under the push of reset spring 78, and then supporting plate 71 is reset, then the wire disc can be removed.

[0035] The basic principle and main features of the present application and the advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A 3D printing filament feeding device, comprising a housing (1), wherein a partition (2) is fixedly connected inside the housing (1), a drive motor (3) is installed on the rear outer wall of the housing (1), the output shaft of the drive motor (3) passes through the rear side wall of the housing (1) and is fixedly connected to a transmission shaft (31), the other end of the transmission shaft (31) rotates through the partition (2) and is fixedly connected to a filament feeding shaft (32), and a drive wheel (33) is fixedly sleeved on the transmission shaft (31), characterized in that: A fixed wire feeding wheel (21) is rotatably provided on the front side wall of the partition (2). A through groove (22) is provided on the partition (2). A lifting block (23) is slidably provided in the through groove (22). An internal thread sleeve (4) is embedded on the upper side wall of the box (1). A screw (41) is internally threaded to the internal thread sleeve (4). The lower end of the screw (41) extends into the through groove (22) and is rotatably connected to the lifting block (23). A handwheel (42) is fixedly connected to the upper end of the screw (41). The box ( 1) A first sliding groove (5) is provided on the rear inner wall. A first slider (51) is slidably provided in the first sliding groove (5). A rotating shaft (6) is rotatably provided on the front side wall of the first slider (51). The front end of the rotating shaft (6) rotates through the lifting block (23) and is fixedly connected to a movable wire feeding wheel (61). A driven wheel (62) is fixedly sleeved on the rotating shaft (6). A tensioning mechanism (7) is provided on the wire feeding shaft (32). An automatic tensioning mechanism (8) is provided between the partition (2) and the rear inner wall of the box (1).

2. The 3D printing filament feeding device according to claim 1, characterized in that: The tensioning mechanism (7) includes a tensioning plate (71), an inflatable airbag (72), a diverter block (73), a diverter cavity, an air chamber (74), a piston (75), a push rod (76), a U-shaped adapter rod (77), a return spring (78), and a connecting pipe (79). Four tensioning plates (71) are arranged around the outer side of the wire feeding shaft (32). An inflatable airbag (72) is installed on the front outer wall of the wire feeding shaft (32). A diverter block (73) is fixedly connected inside the wire feeding shaft (32). The diverter block (73) has a diverter cavity inside, and four pistons (74) are also arranged around the diverter block (73) to communicate with the diverter cavity. An air chamber (74) is provided with a piston (75). A push rod (76) is fixedly connected to the side wall of the piston (75) away from the diversion chamber. The other end of the push rod (76) extends to the outside of the diversion block (73) and is fixedly connected to a U-shaped adapter rod (77). Both ends of the U-shaped adapter rod (77) extend to the outside of the wire feeding shaft (32) and are fixedly connected to the tensioning plate (71). A return spring (78) is also provided between the side wall of the piston (75) away from the diversion chamber and the air chamber (74). The inflatable airbag (72) is connected to the diversion chamber through a connecting pipe (79).

3. The 3D printing filament feeding device according to claim 1, characterized in that: The automatic tensioning mechanism (8) includes a second slide groove (81), a second slider (82), a tensioning wheel (83), and a tensioning spring (84). The rear side wall of the partition (2) and the rear inner wall of the box (1) are both provided with a second slide groove (81). The second slider (82) is slidably arranged in the second slide groove (81). The tensioning wheel (83) is rotatably arranged between the two second sliders (82). The tensioning spring (84) is arranged between the second slider (82) and the upper side wall of the second slide groove (81).

4. The 3D printing filament feeding device according to claim 2, characterized in that: The inflatable airbag (72) is equipped with a pressure relief cap (721).

5. A 3D printing filament feeding device according to claim 3, characterized in that: A transmission belt (9) is wound between the driving wheel (33), the driven wheel (62) and the tensioning wheel (83).

6. The 3D printing filament feeding device according to claim 1, characterized in that: The front side wall of the box (1) is provided with a box door (11).

7. The 3D printing filament feeding device according to claim 1, characterized in that: The box (1) has a wire outlet on one side wall.

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