Refueling cutting and resetting structure and 3D printing device
Patent Information
- Application Number
- CN202522612071.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-09
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-12-09
AI Technical Summary
When changing materials, existing 3D printing equipment is prone to material sticking to or deforming in the heating channel, resulting in material jamming and filaments that affect print quality.
The material changing, cutting, and resetting structure includes a mounting base, transmission components, drive components, rack, gear set, and top block. The material changing is achieved through gear meshing and the rotation of the top block, avoiding material jamming.
It enables quick replacement of printing materials, improves printing efficiency, avoids material jams, saves time, and does not occupy the space for printhead movement.
Smart Images
Figure CN224928537U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of 3D printing, and in particular to a material changing, cutting and resetting structure and a 3D printing device. Background Technology
[0002] In fused deposition modeling (FFF) 3D printing, the material is heated and melted, then ejected through nozzles to stack layer by layer to complete the 3D printing process. Using this structure allows for effective material replacement during the printing process. Currently, when material needs to be replaced, the print head heats up and the material is ejected in the reverse direction. During this process, residual material adheres to the heating channels. Breakage at these points can affect the next feed, or the material may deform due to heat during ejection, resulting in stringing. Stringing and breakage can pose risks to the printing process and certain structural elements. Utility Model Content
[0003] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art. The first objective is to provide a material changing, cutting and resetting structure that can quickly change materials and will not cause material jamming. The second objective is to provide a 3D printing device that can quickly change materials without jamming.
[0004] The technical solution adopted by this utility model is as follows: the material changing, cutting and resetting structure includes a mounting base, on which a transmission component and a driving component are provided. The transmission component has a rack, which meshes with a gear set. The gear set meshes with a working gear. A top block is provided on the working gear. When the transmission component is pushed in a first direction, the top block rotates towards the direction close to the cutter arm. When the transmission component is pushed in a second direction, the top block rotates away from the cutter arm and resets. A cutting blade assembly is connected to the cutter arm. The driving component can drive the cutter arm to approach / move away from the top block. The cutting blade assembly performs cutting when the cutter arm is pushed by the top block.
[0005] Furthermore, the working gear is provided with multiple positioning grooves along the circumference, the mounting base is provided with positioning balls, and an elastic element is provided between the positioning balls and the mounting base, so that the positioning balls can be inserted into / released from the positioning grooves.
[0006] Furthermore, the mounting base is provided with a reset elastic element, which is used to push the top block to reset.
[0007] Furthermore, the gear set includes a main gear and a plurality of driven gears. The main gear meshes with the rack, and the plurality of driven gears mesh sequentially and are connected in a transmission manner between the main gear and the working gear.
[0008] Furthermore, the transmission component includes a rack seat, the rack is located inside the rack seat, a first push block is provided at the bottom of the rack seat, and the driving component has a second push block. The driving component can push the first push block to move linearly horizontally in a first direction or a second direction through the second push block.
[0009] Furthermore, the drive unit is provided with a connector, the cutter arm is rotatably connected to the connector, the cutter assembly is connected to the lower end of the cutter arm, and the cutter assembly performs cutting when the upper end of the cutter arm is pushed by the top block.
[0010] In addition, this utility model also provides a 3D printing device, which includes the aforementioned material changing, cutting and resetting structure.
[0011] The beneficial effects of this utility model are: Compared with the shortcomings of the prior art, in this utility model, during material cutting, the top block rotates and pushes the cutter arm to achieve material cutting, thereby quickly changing the printing material without material jamming, and improving printing efficiency and saving time; when material cutting is not needed, the top block rotates in the opposite direction to store the material, so as to avoid the top block occupying the movement space of the print head. This makes the material changing, cutting and resetting structure have the advantages of quick material changing and no material jamming. Attached Figure Description
[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0013] Figure 1 This is a schematic diagram of the three-dimensional structure of this utility model. Figure 1 ; Figure 2 This is a schematic diagram of the three-dimensional structure of this utility model. Figure 2 ; Figure 3 This is a three-dimensional structural diagram of the transmission component, gear set, and working gear of this utility model; Figure 4 This is a three-dimensional structural diagram of the working gear and top block of this utility model; Figure 5 This is a schematic diagram of the planar structure of this utility model.
[0014] The attached figures are labeled as follows: 1. Mounting base; 2. Transmission component; 3. Rack; 4. Drive component; 5. Gear set; 6. Working gear; 7. Top block; 8. Cutter arm; 9. Cutter assembly; 10. Positioning groove; 11. Positioning ball; 12. Reset elastic element; 13. Main gear; 15. Driven gear; 16. Rack seat; 17. First push block; 19. Second push block; 20. Connecting component.
[0015] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. It should be noted that all directional indicators in this utility model embodiment, such as up, down, left, right, front, back, clockwise, counterclockwise, etc., are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indicator will also change accordingly. Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.
[0017] like Figures 1 to 4 As shown, in this embodiment, the material changing, cutting, and resetting structure includes a mounting base 1. The mounting base 1 is provided with a transmission component 2 and a driving component 4. The transmission component 2 has a rack 3, which meshes with a gear set 5. The gear set 5 meshes with a working gear 6. The working gear 6 is provided with a top block 7. When the transmission component 2 is pushed in a first direction, the top block 7 rotates towards the blade arm 8. When the transmission component 2 is pushed in a second direction, the top block 7 rotates away from the blade arm 8 and resets. A cutting blade assembly 9 is connected to the blade arm 8. The driving component 4 can drive the blade arm 8 to approach / move away from the top block 7. The cutting blade assembly 9 performs cutting when the blade arm 8 is pushed by the top block 7.
[0018] like Figure 1 and Figure 2 As shown, in the initial state, the length direction of the top block 7 is parallel to the length direction of the mounting base 1. At this time, the orientation of the top block 7 can prevent the top block 7 from occupying the movement space of the print head. When material needs to be changed, the transmission component 2 is pushed to move in the first direction. Since the transmission component 2 is connected to the gear set 5 through the rack 3 and the gear set 5 is connected to the working gear 6, the working gear 6 can rotate to drive the top block 7 to rotate towards the direction close to the cutter arm 8 to the preset position. At this time, the length direction of the top block 7 is perpendicular to the length direction of the mounting base 1, that is, the top block 7 rotates 90 degrees clockwise from the initial position. Furthermore, the drive component 4 drives the cutter arm 8 to abut against the top block 7, so that the cutter arm 8 can be pushed by the top block 7 during the continued movement. At this time, the cutter assembly 9 can move and cut the material. After the material is cut, the transmission component 2 is pushed in the opposite direction to the first direction, so that the working gear 6 can rotate in the opposite direction to drive the top block 7 to rotate 90 degrees counterclockwise away from the cutter arm 8 to reset, thereby avoiding the top block 7 occupying the movement space of the print head.
[0019] Compared with the shortcomings of the prior art, in this utility model, during material cutting, the top block 7 rotates and pushes the cutter arm 8 to achieve material cutting, thereby quickly changing the printing material without material jamming, and improving printing efficiency and saving time; when material cutting is not needed, the top block 7 rotates in the opposite direction to store the material, so as to avoid the top block 7 occupying the movement space of the print head, so that the material changing, cutting and resetting structure has the advantages of quick material changing and no material jamming.
[0020] like Figure 4 As shown, in some embodiments, the working gear 6 is provided with multiple positioning grooves 10 along the circumferential direction, and the mounting base 1 is provided with positioning balls 11. An elastic element is provided between the positioning balls 11 and the mounting base 1, and the positioning balls 11 can be inserted into / out of the positioning grooves 10. The elastic element can be a spring. Specifically, to avoid deviation of the top block 7 during rotation, this invention provides multiple positioning grooves 10 on the working gear 6 and positioning balls 11 and an elastic element on the mounting base 1, so that the top block 7 can be accurately positioned by the positioning balls 11 inserted into the corresponding positioning grooves 10 in both the initial position and the cutting position.
[0021] In some embodiments, the mounting base 1 is provided with a reset elastic element 12, which is used to push the top block 7 to reset. The reset elastic element 12 can be a torsion spring, one end of which is fixedly connected to the mounting base 1, and the other end is located on the rotation path of the top block 7. When the top block 7 rotates clockwise to the corresponding position, it abuts against the other end of the torsion spring, allowing the top block 7 to be pushed by the torsion spring to rotate in the reset direction. Specifically, as shown... Figure 5 As shown, in order to avoid the rack 3 being over-pushed and to avoid the working gear 6 being unable to be pushed back to its original position due to the large rotation amplitude of the cantilever, the working gear 6 is reset to a certain angle by the reset elastic element 12, which further facilitates the transmission element 2 to be pushed to smoothly achieve the reset of the top block 7.
[0022] like Figure 3 As shown, in some embodiments, the gear set 5 includes a main gear 13 and a plurality of driven gears 15. The main gear 13 meshes with the rack 3, and the plurality of driven gears 15 mesh sequentially and are connected in a transmission manner between the main gear 13 and the working gear 6.
[0023] like Figure 3 As shown, in some embodiments, the transmission member 2 includes a rack seat 16, the rack 3 is located inside the rack seat 16, a first push block 17 is provided at the bottom of the rack seat 16, and the driving member 4 has a second push block 19. The driving member 4 can push the first push block 17 to move linearly horizontally in a first direction or a second direction through the second push block 19. Specifically, the second push block 19 abuts against one side of the first push block 17 to push the transmission member 2 as a whole to move linearly horizontally in the first direction; the second push block 19 abuts against the other side of the first push block 17 to push the transmission member 2 as a whole to move linearly horizontally in the second direction.
[0024] like Figure 1 and Figure 2As shown, in some embodiments, the driving member 4 is provided with a connecting member 20, the blade arm 8 is rotatably connected to the connecting member 20, and the cutting assembly 9 is connected to the lower end of the blade arm 8. The cutting assembly 9 cuts when the upper end of the blade arm 8 is pushed by the top block 7. Specifically, when the upper end of the blade arm 8 is pushed by the top block 7, the blade arm 8 can rotate around its rotation point, allowing the cutting assembly 9 to move to cut the material. The cutting assembly 9 can cut the material by moving the cutting assembly 9. Specifically, the cutting assembly 9 may include a blade and a blade holder. The blade holder is detachably connected to the lower end of the blade arm 8. The blade holder is provided with a blade groove, and the blade is located in the blade groove. The blade material is high-speed steel or ceramic, and the cutting angle is 30°-45°. During cutting, the blade is moved by the blade holder, so that the blade can cut the material located in the blade groove. The material is cut; in addition, the driving component 4 may include a slider, which is mounted on the X-axis linear motion module, Y-axis linear motion module and Z-axis linear motion module via guide rails. The driving component 4 can move in the X, Y and Z directions to realize the overall movement of the second push block 19, the cutter assembly 9, the cutter arm 8 and the cutter assembly 9. The movement in the X, Y and Z directions is realized by the X-axis linear motion module, Y-axis linear motion module and Z-axis linear motion module of the prior art, and its specific structure will not be described in detail here.
[0025] The material replacement process of this utility model is as follows: During material change, the drive unit 4 drives the second push block 19, the connecting part 20, the cutter arm 8 and the cutter assembly 9 to move in the first direction, so that the second push block 19 can push the first push block 17 to move in the first direction. At this time, the rack 3 drives the main gear 13, multiple driven gears 15 and the working gear 6 to rotate in sequence. Furthermore, the working gear 6 drives the top block 7 to rotate towards the direction of the cutter arm 8 to a preset position, that is, the top block 7 rotates 90 degrees clockwise; wherein, when the top block 7 rotates 90 degrees clockwise, the positioning ball 11 is embedded in the corresponding positioning groove 10; Furthermore, the drive unit 4 drives the connecting member 20, the blade arm 8 and the cutting assembly 9 to move closer to the top block 7, so that the upper end of the blade arm 8 can abut against the front end of the top block 7. The drive unit 4 continues to drive the blade arm 8, so that the blade arm 8 can rotate around its rotation point, so that the cutting assembly 9 can move to cut the material (the material is in the middle of the blade groove of the cutting assembly 9). After the cutting is completed, the drive unit 4 drives the connector 20, the blade arm 8 and the cutter assembly 9 to move away from the top block 7, so as to leave the collision range of the top block 7. At this time, since the top block 7 is in the ejected state, temporarily using the print head movement space, it needs to be reset. Specifically, the drive unit 4 drives the second push block 19 to push the first push block 17 to move in the second direction, so that the working gear 7 and its cantilever can rotate to the initial state to complete the reset.
[0026] It is worth mentioning that, referring to Figure 5 As shown, in this state, the second pusher 19 of the drive unit 4 pushes the rack 3 to a special position, and the working gear 6 and the top block 7 rotate as follows. Figure 5 In the opposite direction shown, and to prevent the second push block 19 from being unable to push back when the cantilever of the working gear 6 is rotated too much, a reset elastic element 12, which is a torsion spring, is installed on the mounting base 1. This allows the working gear 6 to be reset to a certain angle by relying on the reset elastic element 12, so that the second push block 19 has enough space to smoothly push the working gear 6 and its cantilever to reset.
[0027] Furthermore, the present invention also provides a 3D printing apparatus, which includes the aforementioned material changing, cutting, and resetting structure. Preferably, the material changing, cutting, and resetting structure is installed near the print head, and the drive unit 4 can be mounted on the X-axis linear motion module, Y-axis linear motion module, and Z-axis linear motion module via guide rails. Specifically, the specific structure of the material changing, cutting, and resetting structure refers to the above embodiments. Since the 3D printing apparatus adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be elaborated further here.
[0028] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.
Claims
1. A material changing, cutting, and resetting structure, characterized in that: It includes a mounting base (1), on which a transmission component (2) and a driving component (4) are provided. The transmission component (2) has a rack (3), which meshes with a gear set (5). The gear set (5) meshes with a working gear (6). The working gear (6) is provided with a top block (7). When the transmission component (2) is pushed in a first direction, the top block (7) rotates toward the blade arm (8). When the transmission component (2) is pushed in a second direction, the top block (7) rotates away from the blade arm (8) and resets. A cutting blade assembly (9) is connected to the blade arm (8). The driving component (4) can drive the blade arm (8) to approach / away from the top block (7). The cutting blade assembly (9) cuts when the blade arm (8) is pushed by the top block (7).
2. The material changing, cutting, and resetting structure according to claim 1, characterized in that: The working gear (6) is provided with a plurality of positioning grooves (10) along the circumferential direction. The mounting base (1) is provided with a positioning ball (11). An elastic element is provided between the positioning ball (11) and the mounting base (1). The positioning ball (11) can be embedded in / detached from the positioning groove (10).
3. The material changing, cutting, and resetting structure according to claim 1 or 2, characterized in that: The mounting base (1) is provided with a reset elastic element (12), which is used to push the top block (7) to reset.
4. The material changing, cutting, and resetting structure according to claim 1, characterized in that: The gear set (5) includes a main gear (13) and a plurality of driven gears (15). The main gear (13) meshes with the rack (3), and the plurality of driven gears (15) mesh in sequence and are connected in transmission between the main gear (13) and the working gear (6).
5. The material changing, cutting, and resetting structure according to claim 1, characterized in that: The transmission component (2) includes a rack seat (16), the rack (3) is located inside the rack seat (16), a first push block (17) is provided at the bottom of the rack seat (16), and the driving component (4) has a second push block (19). The driving component (4) can push the first push block (17) to move horizontally in a first direction or a second direction by the second push block (19).
6. The material changing, cutting, and resetting structure according to claim 5, characterized in that: The drive member (4) is provided with a connector (20), the blade arm (8) is rotatably connected to the connector (20), the cutter assembly (9) is connected to the lower end of the blade arm (8), and the cutter assembly (9) cuts when the upper end of the blade arm (8) is pushed by the top block (7).
7. A 3D printing device, characterized in that: It includes the material changing, cutting, and resetting structure as described in any one of claims 1-6.