Bracket capable of automatically replacing printing head

Abstract

The invention is applicable to the technical field of FDM3D printer brackets, and provides a bracket capable of automatically replacing a printing head, which comprises a bracket body arranged on an FDM3D printer and a driving box arranged on the bracket body, the driving mechanism is arranged on the bracket body and is used for driving the driving box to move; the arc-shaped plate is arranged at the bottom of the driving box; the printing head body is arranged below the arc-shaped plate and is used for printing a product; the axial guide rail is arranged at the bottom of the bracket body and is used for driving a printing head body to move axially; the first electric telescopic rod is arranged below the arc-shaped plate and is used for adjusting the height of the printing head body; the adjusting mechanism is arranged on the driving box and is used for automatically replacing the printing head body; and the material conveying mechanism is arranged at the top of the bracket body and is used for conveying materials to the printing head body. According to the bracket capable of automatically replacing the printing head, the printing head can be flexibly replaced according to needs, interference of the standby printing head is avoided, and the printing quality is optimized.

Description

Technical Field

[0001] The invention belongs to the technical field of FDM 3D printer brackets, and in particular relates to a bracket capable of automatically replacing a print head. Background Art

[0002] 3D printing is a type of rapid prototyping technology, also known as additive manufacturing. It is a technology that uses digital model files as the basis and uses adhesive materials such as powdered metal or plastic to construct objects by printing layer by layer.

[0003] At present, the multiple print heads on the existing 3D printer bracket are mostly fixed horizontally on the support plate of the bracket, and then the print heads can be replaced according to the required colors when performing multi-color printing operations. However, since the multiple print heads are all arranged horizontally, when printing products with more complex structures, other standby print heads will affect the printing of the product. After searching, the patent document with authorization announcement number CN114834032A has the above-mentioned problem. Summary of the invention

[0004] The present invention provides a bracket capable of automatically replacing a print head, aiming to solve the problem in the above-mentioned background technology that multiple print heads on a bracket of a 3D printer easily affect the printing of complex products.

[0005] To solve the above problems, the present invention is implemented as follows: a bracket that can automatically replace a print head, comprising: a bracket body arranged on an FDM3D printer and a drive box arranged on the bracket body; a drive mechanism arranged on the bracket body for driving the drive box to move; an arc plate arranged at the bottom of the drive box; a print head body for printing products arranged below the arc plate; an axial guide rail arranged at the bottom of the bracket body for driving the axial movement of the print head body; a first electric telescopic rod arranged below the arc plate for adjusting the height of the print head body; an adjustment mechanism arranged on the drive box for automatically replacing the print head body; and a feeding mechanism arranged at the top of the bracket body for feeding material to the print head body.

[0006] Preferably, the driving mechanism consists of a connecting cavity, a guide rack, a connecting gear, a servo motor and a guide rod. The connecting cavity is opened in the driving box. The guide rack and the guide rod are both located below the bracket body and slide through the driving box. The connecting gear is rotatably installed in the connecting cavity. The connecting gear is meshed with the guide rack. The servo motor is fixedly installed on the top of the connecting cavity. The output shaft of the servo motor is fixedly connected to the output rod of the connecting gear.

[0007] Preferably, the adjustment mechanism includes: a U-shaped opening at the bottom of the drive box; a driving gear rotatably installed in the U-shaped opening; a guide block fixedly installed in the U-shaped opening, and the arc plate is slidably connected to the guide block; an arc-shaped rack fixedly installed on the top of the arc plate, and the arc-shaped rack is meshed with the driving gear; a small motor fixedly installed on one side of the drive box, and the output shaft of the small motor is fixedly connected to the output rod of the driving gear.

[0008] Preferably, a connecting plate is fixedly installed at the bottom of the arc plate, a connecting plate is slidably installed at the bottom of the connecting plate, the connecting plate is located on one side of the print head body, and the output rod of the first electric telescopic rod is fixedly connected to the connecting plate.

[0009] Preferably, the feeding mechanism includes: a group of support plates fixedly mounted on the top of the bracket body; a second electric telescopic rod fixedly mounted on one side of any one of the support plates; a group of rectangular seats rotatably mounted on the second electric telescopic rod and the other support plate respectively; a material rack mounted on a group of the rectangular seats; and a rotating mechanism provided on a group of the support plates for driving the material rack to rotate.

[0010] Preferably, the rotating mechanism includes: a connecting frame fixedly mounted on a group of the support plates; a rectangular rod rotatably mounted on the connecting frame; a conical wheel fixedly mounted on one side of the material rack; a conical driving wheel sleeved on the rectangular rod, the conical driving wheel being adapted to the conical wheel; a first motor fixedly mounted on one side of the connecting frame, the output shaft of the first motor being fixedly connected to the output end of the rectangular rod.

[0011] Preferably, a cylinder is fixedly mounted on the top of the inner wall of the connecting frame, a fixing plate is fixedly mounted on the output rod of the cylinder, a connecting tube is slidably sleeved on the rectangular rod, the connecting tube is rotatably connected to the fixing plate, and the conical driving wheel is fixedly sleeved on the connecting tube.

[0012] Preferably, the output block of the material rack and the opening of the connecting cylinder are both arranged in a rectangular shape, and the fixing sleeve on the conical driving wheel is provided with an anti-slip ring.

[0013] Preferably, a mounting block is fixedly installed on the top of the bracket body, and the mounting block is located on the front side of the material rack. A group of guide rollers are rotatably installed on the mounting block, and a group of guide rollers are in sliding contact with the plastic wires on the material rack. The output rod of any guide roller and the rectangular seat located on the support plate are fixedly sleeved with a first sprocket, and the two first sprockets are sleeved with a first chain, and the first chain is meshed with the two first sprockets.

[0014] Preferably, a one-way screw is rotatably installed on one side of the bracket body, a slide is provided on the threaded sleeve of the one-way screw, the slide is slidably connected to the vertical plate of the bracket body, one side of the slide is fixedly connected to the guide rack and the guide rod, a second sprocket is fixedly provided on the top end of the one-way screw, a second chain is sleeved on the second sprocket, the second chain and the second sprocket are meshed with each other, a second motor is fixedly installed on the top of the bracket body, and the output shaft of the second motor is meshed with the second sprocket.

[0015] Preferably, a fixing bracket is fixedly installed at the bottom of the connecting plate, a clamping block and a mounting plate are fixedly installed inside the fixing bracket, a threaded rod is rotatably installed on one side of the inner wall of the fixing bracket, one end of the threaded rod is rotatably connected to the mounting plate, a sliding block is threadedly sleeved on the threaded rod, a connecting block is installed on one side of the sliding block, and the connecting block and the clamping block are both slidably connected to the mounting groove of the print head body.

[0016] Preferably, a handle is fixedly installed on one end of the threaded rod, a ring-shaped pad is fixedly installed on one side of the fixing frame, the ring-shaped pad is located on one side of the handle, a connecting piece is installed on one end of the threaded rod, the connecting piece is located on one side of the ring-shaped pad, a screw rod is threadedly installed on the handle, the screw rod is threadedly connected to the connecting piece and is in rotational contact with the ring-shaped pad.

[0017] Compared with the related art, the bracket capable of automatically replacing the print head provided by the present invention has the following beneficial effects: Compared with the prior art, the bracket for automatically replacing the print head provided in the present solution can automatically replace the print head body, thereby facilitating multi-color printing operations, avoiding interference from the standby print head body, and optimizing printing quality. The design of the arc plate, drive mechanism, and axial guide rail makes the print head body more flexible and stable during movement and replacement, thereby improving printing accuracy and reliability.

[0018] In summary, the bracket capable of automatically replacing the print head of the present invention can flexibly replace the print head as needed, avoid interference from the standby print head, and optimize the printing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the main cross-sectional structure of a bracket capable of automatically replacing a print head provided by the present invention; Figure 2 It is a schematic diagram of the main structure of a bracket capable of automatically replacing a print head provided by the present invention; Figure 3 It is a side cross-sectional structural schematic diagram of the driving mechanism provided by the present invention; Figure 4 It is a schematic diagram of the side cross-sectional structure of the adjustment mechanism and the print head body provided by the present invention; Figure 5 It is a partial front view cross-sectional structural schematic diagram of the feeding mechanism provided by the present invention; Figure 6 It is an assembly diagram of the one-way screw and the slide provided by the present invention; Figure 7 It is an assembly diagram of the middle guide roller, the rectangular seat, the first sprocket and the first chain provided by the present invention; Figure 8 It is an assembly diagram of the threaded rod and the slider provided by the present invention; Fig. 9 A three-dimensional structural schematic diagram of a middle rectangular rod, a connecting cylinder and a conical driving wheel is provided for the present invention; Fig.10 for Figure 4 An enlarged structural diagram of part A shown in FIG. Fig.11 for Figure 5 An enlarged schematic diagram of the structure of part B shown in FIG. Fig.12 for Figure 8 Schematic diagram of the enlarged structure of part C shown in FIG.

[0020] Figure numerals: 1, bracket body; 2, drive box; 3, drive mechanism; 301, connecting cavity; 302, guide rack; 303, connecting gear; 304, servo motor; 305, guide rod; 4, arc plate; 5, print head body; 6, axial guide rail; 7, driving gear; 8, guide block; 9, arc rack; 10, small motor; 11, connecting plate; 12, connecting plate; 13, first electric telescopic rod; 14, support plate; 15, second electric telescopic rod; 16, rectangular seat; 17, material rack; 18, connecting rack; 19, rectangular rod; 20, conical wheel; 21, conical driving wheel; 22, first motor; 23, cylinder; 24, fixed plate; 25, connecting tube; 26, anti-skid ring; 27, mounting block; 28, guide roller; 29, first sprocket; 30, first chain; 31, one-way screw; 32, slide; 33, second sprocket; 34, second chain; 35, second motor; 36, fixed frame; 37, block; 38, mounting plate; 39, threaded rod; 40, slider; 41, connecting block; 42, handle; 43, annular pad; 44, connecting plate; 45, screw rod. DETAILED DESCRIPTION

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field of the present application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "including" and "having" in the specification and claims of the present application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of the present application or the above-mentioned figures are used to distinguish different objects, rather than to describe a specific order; the terms "inside", "outside", "left", and "right" indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0022] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0023] The embodiment of the present invention provides a bracket capable of automatically replacing a print head, such as Figure 1-12 As shown, the bracket capable of automatically replacing the print head comprises: a bracket body 1 arranged on the FDM3D printer and a drive box 2 arranged on the bracket body 1; a drive mechanism 3 arranged on the bracket body 1 for driving the drive box 2 to move; an arc plate 4 arranged at the bottom of the drive box 2; a print head body 5 for printing products arranged below the arc plate 4; an axial guide rail 6 arranged at the bottom of the bracket body 1 for driving the axial movement of the print head body 5; a first electric telescopic rod 13 arranged below the arc plate 4 for adjusting the height of the print head body 5; an adjustment mechanism arranged on the drive box 2 for automatically replacing the print head body 5; and a feeding mechanism arranged at the top of the bracket body 1 for feeding materials to the print head body 5.

[0024] In this embodiment, during the printing process of the FDM3D printer, according to the color and structure of the product to be printed, the driving mechanism 3 will drive the driving box 2 and the print head body 5 thereon to move to the appropriate position, and replace the appropriate print head body 5 through the adjustment mechanism. At the same time, since one group of print head bodies 5 are arranged on the arc plate 4, when the print head body 5 is replaced, the other print head body 5 is arranged above the print head body 5 in an inclined state, ensuring that the standby print head body 5 will not affect the operation of the running print head body 5. The feeding mechanism continues to transport materials to the print head body 5 to complete the printing operation. By automatically replacing the print head body 5, multi-color printing operations are facilitated, interference from the standby print head body 5 is avoided, and printing quality is optimized. The design of the arc plate 4, the driving mechanism 3 and the axial guide rail 6 makes the print head body 5 more flexible and stable during movement and replacement, thereby improving the accuracy and reliability of printing.

[0025] In a further preferred embodiment of the present invention, the driving mechanism 3 consists of a connecting cavity 301, a guide rack 302, a connecting gear 303, a servo motor 304 and a guide rod 305, the connecting cavity 301 is opened in the driving box 2, the guide rack 302 and the guide rod 305 are both located below the bracket body 1 and slide through the driving box 2, the connecting gear 303 is rotatably installed in the connecting cavity 301, the connecting gear 303 is meshed with the guide rack 302, the servo motor 304 is fixedly installed on the top of the connecting cavity 301, and the output shaft of the servo motor 304 is fixedly connected to the output rod of the connecting gear 303.

[0026] In this embodiment, during the printing process, the servo motor 304 accurately controls the rotation of its output shaft according to the printing requirements, thereby driving the connecting gear 303 to move along the guide rack 302. The rotation and movement of the connecting gear 303 drives the driving box 2 and the print head body 5 thereon to move precisely horizontally on the bracket body 1. At the same time, the guide rod 305 provides additional support and guiding effects for the driving box 2, ensuring the stability and accuracy of the print head body 5 during the movement. Through the precise control of the servo motor 304 and the precise engagement of the connecting gear 303 with the guide rack 302, the precise movement of the driving box 2 and the print head body 5 thereon on the bracket body 1 is achieved, thereby improving the printing accuracy. The guide rod 305 provides additional support and guiding effects for the driving box 2, ensuring the stability and accuracy of the print head body 5 during the movement, and avoiding printing quality problems caused by shaking or offset.

[0027] In a further preferred embodiment of the present invention, the adjustment mechanism includes: a U-shaped opening opened at the bottom of the drive box 2; a driving gear 7 rotatably installed in the U-shaped opening; a guide block 8 fixedly installed in the U-shaped opening, and the arc plate 4 is slidably connected to the guide block 8; an arc-shaped rack 9 fixedly installed on the top of the arc plate 4, and the arc-shaped rack 9 is meshed with the driving gear 7; a small motor 10 fixedly installed on one side of the drive box 2, and the output shaft of the small motor 10 is fixedly connected to the output rod of the driving gear 7.

[0028] In this embodiment, when the print head needs to be replaced, the small motor 10 will accurately control the rotation of its output shaft according to the position of the print head to be replaced, thereby driving the driving gear 7 to rotate, so that it drives the arc rack 9 to move along the guide block 8. The movement of the arc rack 9 drives the arc plate 4 and the print head body 5 thereon to accurately move and position on the drive box 2. At the same time, the guide block 8 provides additional support and guiding effects for the arc plate 4, ensuring the stability and accuracy of the print head body 5 during the replacement and positioning process. Through the precise control of the small motor 10 and the precise engagement of the driving gear 7 with the arc rack 9, the print head body 5 can be quickly and accurately replaced and positioned on the drive box 2, thereby improving the replacement efficiency. The guide block 8 provides additional support and guiding effects for the arc plate 4, ensuring the stability and accuracy of the print head body 5 during the replacement and positioning process, thereby avoiding printing quality problems caused by shaking or offset.

[0029] In a further preferred embodiment of the present invention, a connecting plate 11 is fixedly installed at the bottom of the arc plate 4, a connecting plate 12 is slidably installed at the bottom of the connecting plate 11, the connecting plate 12 is located on one side of the print head body 5, and the output rod of the first electric telescopic rod 13 is fixedly connected to the connecting plate 12.

[0030] In the present embodiment, when the print head body 5 in standby mode needs to be operated, the first electric telescopic rod 13 is first started, so that the output rod of the first electric telescopic rod 13 drives the connecting plate 12 to slide, so that the connecting plate 12 drives the print head body 5 to slide down, and at the same time, the top rod of the connecting plate 12 slides along the connecting plate 11, so that the nozzle of the print head body 5 in operation is lower than the nozzle of the print head body 5 in standby mode, thereby ensuring that the print head body 5 in standby mode does not affect the print head body 5 in operation. Through the precise control of the first electric telescopic rod 13 and the sliding of the connecting plate 12 on the connecting plate 11, the precise fine-tuning of the print head body 5 in the vertical direction is achieved, and the positioning accuracy is improved. The synergistic effect of the connecting plate 11, the connecting plate 12 and the first electric telescopic rod 13 provides additional support and fine-tuning capabilities for the print head body 5, enhances the stability of the print head body 5 in the working state, and through the precise fine-tuning of the position of the print head body 5, the precise contact between the print head body 5 and the printing material can be ensured, thereby optimizing the printing quality and reducing the printing defects caused by position deviation.

[0031] In a further preferred embodiment of the present invention, the feeding mechanism includes: a group of support plates 14 fixedly mounted on the top of the bracket body 1; a second electric telescopic rod 15 fixedly mounted on one side of any one of the support plates 14; a group of rectangular seats 16 rotatably mounted on the second electric telescopic rod 15 and the other support plate 14 respectively; a material rack 17 mounted on a group of the rectangular seats 16; and a rotating mechanism provided on a group of the support plates 14 for driving the material rack 17 to rotate.

[0032] In this embodiment, during the printing process, the rotating mechanism will accurately control the rotation of the material rack 17 according to the printing requirements, so that the material on the material rack 17 can be accurately transported to the bottom of the print head body 5, and the printing operation is performed according to a predetermined trajectory. At the same time, when the material on the material rack 17 needs to be replaced after use, the second electric telescopic rod 15 is started, so that the output rod of the second electric telescopic rod 15 drives the rectangular seat 16 to slide, so that the rectangular seat 16 slides away from the output block of the material rack 17, and then it can be removed from the support plate 14, and the replacement is relatively quick. The arrangement of the second electric telescopic rod 15 and the rectangular seat 16 facilitates the rapid replacement of the material rack 17, which is beneficial to improving the processing efficiency. The stable design of the support plate 14 and the rectangular seat 16, as well as the precise control of the second electric telescopic rod 15 and the rotating mechanism, ensure the stability and accuracy of the feeding mechanism, and avoid printing quality problems caused by shaking or deviation.

[0033] In a further preferred embodiment of the present invention, the rotating mechanism includes: a connecting frame 18 fixedly mounted on a group of the support plates 14; a rectangular rod 19 rotatably mounted on the connecting frame 18; a conical wheel 20 fixedly mounted on one side of the material frame 17; a conical driving wheel 21 sleeved on the rectangular rod 19, the conical driving wheel 21 is adapted to the conical wheel 20; a first motor 22 fixedly mounted on one side of the connecting frame 18, and the output shaft of the first motor 22 is fixedly connected to the output end of the rectangular rod 19.

[0034] In this embodiment, during the printing process, the first motor 22 will accurately control the rotation of its output shaft according to the printing requirements, thereby driving the rotation of the rectangular rod 19 and the conical driving wheel 21. The rotation of the conical driving wheel 21 will rotate along the inclined surface of the conical wheel 20, so that the conical driving wheel 21 drives the conical wheel 20 to rotate, and at the same time drives the rotation of the material rack 17. The precise control of this rotation ensures that the printing material can be transported along a predetermined trajectory, thereby meeting the needs of the printing job. Through the precise control of the first motor 22 and the precise engagement of the conical driving wheel 21 and the conical wheel 20, the precise adjustment of the rotation angle of the material rack 17 is achieved, and the printing accuracy is improved. The stable design of the connecting frame 18, the rectangular rod 19 and the conical driving wheel 21, and the precise control of the first motor 22 ensure the stability and accuracy of the rotating mechanism, and avoid printing quality problems caused by shaking or offset.

[0035] In a further preferred embodiment of the present invention, a cylinder 23 is fixedly installed on the top of the inner wall of the connecting frame 18, a fixing plate 24 is fixedly installed on the output rod of the cylinder 23, a connecting tube 25 is slidably sleeved on the rectangular rod 19, the connecting tube 25 is rotatably connected to the fixing plate 24, and the conical driving wheel 21 is fixedly sleeved on the connecting tube 25.

[0036] In this embodiment, since the print head body 5 is operated individually, when a certain print head body 5 is operated, its corresponding material rack 17 needs to transport material to the print head body 5. When transporting the material, the cylinder 23 is first started to make the output rod of the cylinder 23 drive the connecting tube 25 to slide, so that the connecting tube 25 drives the conical driving wheel 21 to slide and contact the conical wheel 20, thereby facilitating the rotating mechanism to drive the conical driving wheel 21 to rotate. At the same time, other cylinders 23 drive the connecting tube 25 to slide, so that the conical driving wheel 21 slides away from the conical wheel 20, thereby ensuring that the rotating mechanism only drives a single material rack 17 to rotate for loading operations. By setting multiple cylinders 23, it is convenient for the rotating mechanism to drive a single material rack 17 to rotate, thereby facilitating accurate loading operations on the print head body 5 during operation.

[0037] In a further preferred embodiment of the present invention, the output block of the material rack 17 and the opening of the connecting tube 25 are both rectangular, and an anti-slip ring 26 is fixedly sleeved on the conical driving wheel 21 .

[0038] In this embodiment, the anti-skid ring 26 can increase the friction between the conical wheel 20 and the conical driving wheel 21 to prevent slipping during rotation. The rectangular design of the output block of the material rack 17 and the opening of the connecting tube 25 increases the contact area and stability of the rotating structure, prevents shaking, slipping or deviation during rotation, and improves printing accuracy. The anti-skid ring 26 fixedly mounted on the conical driving wheel 21 increases the friction between the conical wheel 20 and prevents slipping, ensuring the accuracy and continuity of rotation. The stable rotating structure and good meshing performance can ensure that the printing material is transported according to the predetermined trajectory and speed, thereby optimizing printing efficiency.

[0039] In a further preferred embodiment of the present invention, a mounting block 27 is fixedly installed on the top of the bracket body 1, and the mounting block 27 is located on the front side of the material rack 17. A group of guide rollers 28 are rotatably installed on the mounting block 27, and a group of guide rollers 28 are in sliding contact with the plastic wire on the material rack 17. The output rod of any guide roller 28 and the rectangular seat 16 located on the support plate 14 are fixedly sleeved with a first sprocket 29, and the two first sprockets 29 are sleeved with a first chain 30, and the first chain 30 is meshed with the two first sprockets 29.

[0040] In this embodiment, when the plastic line on the material rack 17 is conveyed, it will slide in contact with the guide roller 28 and be guided and supported by the guide roller 28. At the same time, when the material rack 17 rotates to convey the plastic line, the first sprocket 29 on the rectangular seat 16 drives the first chain 30 to rotate, and drives any guide roller 28 to rotate through the meshing action between the sprocket and the chain, so that when the material rack 17 conveys the material, the guide roller 28 guides the material at the same time to ensure stable material conveying. The introduction of the guide roller 28 can smoothly guide and support the conveying of the plastic line, reduce the friction resistance between the plastic line and the conveying path, and improve the conveying stability. The transmission design of the first sprocket 29 and the first chain 30 can ensure the synchronous rotation of the material rack 17 and the guide roller 28, realize the linkage or synchronization function, and optimize the transmission efficiency. The design of the guide roller 28 and the chain transmission can adapt to the conveying requirements of plastic lines of different types and specifications, thereby improving the versatility and flexibility of the 3D printer.

[0041] In a further preferred embodiment of the present invention, a one-way screw 31 is rotatably installed on one side of the bracket body 1, a slide 32 is threadedly sleeved on the one-way screw 31, the slide 32 is slidably connected to the vertical plate of the bracket body 1, one side of the slide 32 is fixedly connected to the guide rack 302 and the guide rod 305, a second sprocket 33 is fixedly sleeved on the top end of the one-way screw 31, a second chain 34 is sleeved on the second sprocket 33, the second chain 34 and the second sprocket 33 are meshed with each other, a second motor 35 is fixedly installed on the top of the bracket body 1, and the output shaft of the second motor 35 is meshed with the second sprocket 33.

[0042] In this embodiment, when the height of the print head body 5 needs to be adjusted, the second motor 35 is first started, so that the output shaft of the second motor 35 drives the one-way screw 31 to rotate, so that the second sprocket 33 on the one-way screw 31 drives the second chain 34 to rotate, and the two one-way screws 31 are driven to rotate synchronously through meshing. At the same time, the one-way screw 31 drives the slide 32 to slide along the vertical plate of the bracket body 1 when rotating, and the slide 32 drives the guide rack 302 and the guide rod 305 to slide up and down, thereby adjusting the height of the drive box 2. It is convenient to adjust the height of the print head body 5 according to the printed product. Through the threaded connection design of the one-way screw 31 and the slide 32, the precise adjustment of the position of the guide rack 302 and the guide rod 305 is achieved, thereby improving the printing accuracy. The sliding connection design between the slide 32 and the vertical plate of the bracket body 1 ensures the stability of the slide 32 during movement and prevents shaking or deviation. The second motor 35 realizes the synchronous drive of the two one-way screws 31 through the transmission design of the second sprocket 33 and the second chain 34, thereby optimizing the transmission efficiency.

[0043] In order to further improve the use effect of the device, in addition to the above scheme, this scheme also has the following embodiments: In another embodiment of the present invention, a fixing frame 36 is fixedly installed at the bottom of the connecting plate 12, and a clamping block 37 and a mounting plate 38 are fixedly installed inside the fixing frame 36. A threaded rod 39 is rotatably installed on one side of the inner wall of the fixing frame 36, and one end of the threaded rod 39 is rotatably connected to the mounting plate 38. A slider 40 is threadedly sleeved on the threaded rod 39, and a connecting block 41 is installed on one side of the slider 40. The connecting block 41 and the clamping block 37 are both slidably connected to the mounting groove of the print head body 5.

[0044] In this embodiment, when the damaged print head body 5 needs to be replaced, the threaded rod 39 is first rotated. Since the threaded rod 39 and the slider 40 are threadedly sleeved, the rotation of the threaded rod 39 will push the slider 40 to move along its axial direction. The movement of the slider 40 will then drive the synchronous movement of the connecting block 41. The connecting block 41 is slidingly connected to the mounting groove of the print head body 5, so the movement of the connecting block 41 will slide away from the mounting groove of the print head body 5. After that, the damaged print head body 5 can be removed for replacement. The threaded connection design of the threaded rod 39 and the slider 40 allows quick loading and unloading of the print head body 5. The installation position of the print head body 5 can be adjusted by rotating the threaded rod 39, which simplifies the operation process and improves work efficiency.

[0045] In another embodiment of the present invention, a handle 42 is fixedly installed on one end of the threaded rod 39, a ring-shaped pad 43 is fixedly installed on one side of the fixing frame 36, and the ring-shaped pad 43 is located on one side of the handle 42; a connecting piece 44 is installed on one end of the threaded rod 39, and the connecting piece 44 is located on one side of the ring-shaped pad 43; a screw rod 45 is threadedly installed on the handle 42, and the screw rod 45 is threadedly connected to the connecting piece 44 and is in rotational contact with the ring-shaped pad 43.

[0046] In this embodiment, when installing the print head body 5, first, the installation groove on one side of the print head body 5 is slidably connected to the block 37, and then the user holds the handle 42 and rotates the threaded rod 39 to slide the connecting block 41 into the installation groove on the other side of the print head body 5, and installs the print head body 5. After installation, the screw rod 45 is rotated to make one end of the screw rod 45 contact the annular pad 43, thereby limiting the threaded rod 39 and ensuring that the slider 40 will not be displaced, which is beneficial to the fixing operation of the print head body 5.

[0047] In summary, compared with the related art, the present device has the feature of being able to flexibly replace the print head as needed, avoiding interference from the standby print head, and optimizing the printing quality.

[0048] In the several embodiments provided in this application, it should be understood that the disclosed device can be implemented in other ways.

[0049] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the scope of protection of the invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on these embodiments, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in this field can still combine, add, delete or make other adjustments to the features in the various embodiments of the present invention according to the circumstances without conflict, without making creative work, so as to obtain different other technical solutions that do not deviate from the concept of the present invention in essence, and these technical solutions also belong to the scope of protection of the present invention.

Claims

1. A bracket capable of automatically replacing a print head, characterized in that: include: A bracket body (1) arranged on an FDM 3D printer, and a drive box (2) arranged on the bracket body (1); A driving mechanism (3) provided on the bracket body (1) and used for driving the driving box (2) to move; An arc-shaped plate (4) provided at the bottom of the drive box (2); A print head body (5) disposed below the arc-shaped plate (4) and used for printing products; An axial guide rail (6) provided at the bottom of the bracket body (1) and used for driving the print head body (5) to move axially; A first electric telescopic rod (13) disposed below the arc-shaped plate (4) and used for adjusting the height of the print head body (5); An adjustment mechanism provided on the drive box (2) and used for automatically replacing the print head body (5); A material feeding mechanism is provided on the top of the bracket body (1) and is used for feeding material to the print head body (5).

2. The bracket for automatically replacing a print head as claimed in claim 1, characterized in that: The driving mechanism (3) comprises a connecting cavity (301), a guide rack (302), a connecting gear (303), a servo motor (304) and a guide rod (305); the connecting cavity (301) is opened in the driving box (2); the guide rack (302) and the guide rod (305) are both located below the bracket body (1) and slide through the driving box (2); the connecting gear (303) is rotatably mounted in the connecting cavity (301); the connecting gear (303) is meshed with the guide rack (302); the servo motor (304) is fixedly mounted on the top of the connecting cavity (301); and the output shaft of the servo motor (304) is fixedly connected to the output rod of the connecting gear (303).

3. The carriage for automatically replacing a print head as claimed in claim 1, characterized in that: The regulating mechanism comprises: A U-shaped opening is provided at the bottom of the drive box (2); Rotating a driving gear (7) installed in the U-shaped opening; A guide block (8) fixedly mounted in the U-shaped opening, the arc-shaped plate (4) being slidably connected to the guide block (8); An arc-shaped rack (9) fixedly mounted on the top of the arc-shaped plate (4), the arc-shaped rack (9) meshing with the driving gear (7); A small motor (10) is fixedly mounted on one side of the drive box (2), and an output shaft of the small motor (10) is fixedly connected to an output rod of the driving gear (7).

4. The carriage capable of automatically replacing a print head as claimed in claim 1, characterized in that: A connecting plate (11) is fixedly mounted on the bottom of the arc-shaped plate (4), a connecting plate (12) is slidably mounted on the bottom of the connecting plate (11), the connecting plate (12) is located on one side of the print head body (5), and the output rod of the first electric telescopic rod (13) is fixedly connected to the connecting plate (12).

5. The carriage capable of automatically replacing a print head as claimed in claim 1, characterized in that: The feeding mechanism comprises: A set of support plates (14) fixedly mounted on the top of the bracket body (1); A second electric telescopic rod (15) fixedly mounted on one side of any one of the support plates (14); A group of rectangular seats (16) rotatably mounted on the second electric telescopic rod (15) and the other support plate (14); A material rack (17) mounted on a set of the rectangular seats (16); A rotating mechanism is provided on a group of the support plates (14) and is used to drive the material rack (17) to rotate.

6. The carriage capable of automatically replacing a print head as claimed in claim 5, characterized in that: The rotating mechanism comprises: A connecting frame (18) fixedly mounted on a set of the support plates (14); Rotating a rectangular rod (19) mounted on the connecting frame (18); A conical wheel (20) fixedly mounted on one side of the material rack (17); A conical driving wheel (21) sleeved on the rectangular rod (19), the conical driving wheel (21) being compatible with the conical wheel (20); A first motor (22) is fixedly mounted on one side of the connecting frame (18), and an output shaft of the first motor (22) is fixedly connected to an output end of the rectangular rod (19).

7. The carriage capable of automatically replacing a print head as claimed in claim 6, characterized in that: A cylinder (23) is fixedly mounted on the top of the inner wall of the connecting frame (18); a fixing plate (24) is fixedly mounted on the output rod of the cylinder (23); a connecting tube (25) is slidably sleeved on the rectangular rod (19); the connecting tube (25) is rotatably connected to the fixing plate (24); and the conical driving wheel (21) is fixedly sleeved on the connecting tube (25).

8. The carriage capable of automatically replacing a print head as claimed in claim 7, characterized in that: The output block of the material rack (17) and the opening of the connecting cylinder (25) are both arranged in a rectangular shape, and an anti-slip ring (26) is fixedly sleeved on the conical driving wheel (21).

9. The carriage capable of automatically replacing a print head as claimed in claim 6, characterized in that: A mounting block (27) is fixedly mounted on the top of the bracket body (1), and the mounting block (27) is located at the front side of the material rack (17). A group of guide rollers (28) are rotatably mounted on the mounting block (27), and a group of guide rollers (28) are in sliding contact with the plastic wires on the material rack (17). A first sprocket (29) is fixedly sleeved on an output rod of any guide roller (28) and a rectangular seat (16) located on the support plate (14), and a first chain (30) is sleeved on the two first sprockets (29), and the first chain (30) is meshed with the two first sprockets (29).

10. The carriage capable of automatically replacing a print head as claimed in claim 2, characterized in that: A one-way screw rod (31) is rotatably mounted on one side of the bracket body (1); a slide (32) is threadedly sleeved on the one-way screw rod (31); the slide (32) is slidably connected to a vertical plate of the bracket body (1); one side of the slide (32) is fixedly connected to the guide rack (302) and the guide rod (305); a second sprocket (33) is fixedly sleeved on the top of the one-way screw rod (31); a second chain (34) is sleeved on the second sprocket (33); the second chain (34) and the second sprocket (33) are meshed; a second motor (35) is fixedly mounted on the top of the bracket body (1); an output shaft of the second motor (35) is meshed with the second sprocket (33).

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