A three-dimensional molding apparatus

Abstract

The utility model provides a kind of three-dimensional forming device, including main casing, the inside installation of main casing has feeding mechanism;The end of main casing is connected with pen head, and heating head is installed in pen head, feeding mechanism includes transmission bracket and speed reducer motor, and feeding wheel is rotatably installed in the side of transmission bracket, and bearing is rotatably installed in the side close to feeding wheel;Speed reducer motor is transmission connection with feeding wheel;The outer periphery of feeding wheel is provided with feeding groove, and multiple groups of convex points are arranged in the inside of feeding groove.The utility model is by adopting the feeding wheel with convex point and bearing cooperation clamping and conveying consumable, and the convex point on feeding wheel can effectively pierce into the surface of consumable, provide more stable driving force, and bearing is used as driven piece to compress consumable, this design significantly reduces the risk of friction reduction due to dust accumulation on transmission surface, solves the defect of consumable skidding, unstable transportation, ensures the reliability and consistency of feeding.

Description

Technical Field

[0001] This utility model belongs to the field of three-dimensional molding technology, and more specifically, it relates to a three-dimensional molding device. Background Technology

[0002] 3D printing pens break through the two-dimensional limitations of traditional writing and drawing, which rely on paper, and can quickly transform design sketches of any shape directly from flat 2D graphics into solid 3D objects. Their working principle is similar to that of 3D printers, and they typically use PLA or ABS plastic as raw materials.

[0003] Currently, 3D printing pens typically employ gear-driven feeding mechanisms to transport plastic filaments (strips). For example, patent number US9731444B2 utilizes a multi-gear structure. This type of feeding mechanism is relatively complex. More importantly, the characteristics of some filaments cause them to generate dust during transport, which adheres to the gears, reducing friction between the gears and the filament and leading to slippage, thus affecting the stability of filament transport. Therefore, this paper researches and improves upon existing structures and their shortcomings to provide a 3D printing device with greater practical value. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a three-dimensional forming device, which is achieved by the following specific technical means:

[0005] A three-dimensional molding device includes a main housing, inside which a feeding mechanism is installed. A pen tip is connected to one end of the main housing, and a heating head is installed inside the pen tip. The feeding mechanism includes a transmission bracket and a reduction motor. A feeding wheel is rotatably mounted on one side of the transmission bracket, and a bearing is rotatably mounted on the side near the feeding wheel for clamping the raw material between the feeding wheel and the bearing. The reduction motor is drive-connected to the feeding wheel. A feeding groove is provided on the outer circumference of the feeding wheel, and multiple sets of protrusions are provided inside the feeding groove. The protrusions are cone-shaped, pyramidal, or other structurally designed to penetrate the surface of the consumable material, and are arranged in a staggered manner.

[0006] Furthermore, the geared motor is fixedly installed on one side of the transmission bracket, and the motor shaft of the geared motor passes through to the other side of the transmission bracket; a transmission shaft is fixedly installed at the center of the feeding wheel, and the other end of the transmission shaft is connected to the motor shaft.

[0007] Furthermore, a first synchronous pulley is fixedly connected to the end of the motor shaft, and a second synchronous pulley is fixedly connected to the end of the transmission shaft, with a synchronous belt connecting the second synchronous pulley and the first synchronous pulley.

[0008] Furthermore, a sprocket is fixedly connected to the end of the motor shaft, and a sprocket is fixedly connected to the end of the transmission shaft, with a chain connecting the sprocket and the sprocket.

[0009] Furthermore, a heating head fixing component is fixedly installed at one end of the main housing, and the heating head is installed at the bottom end of the heating head fixing component; the transmission bracket is installed inside the main housing by fasteners, and a connecting hole is provided at the bottom end of the transmission bracket, and a guide tube is connected between the connecting hole and the heating head fixing component.

[0010] Furthermore, the main housing is composed of an upper shell and a lower shell, and both the upper shell and the lower shell are provided with mounting grooves on the side near the transmission bracket mounting location. The two sets of mounting grooves are combined to form a mounting opening, and a lens cover is fitted into the mounting opening.

[0011] Furthermore, a lens, control buttons, and a push-pull button are installed on one side of the upper shell, and a control motherboard is installed on the inside of the upper shell by fasteners. A display screen, a power switch, and a control switch are respectively provided on one side of the control motherboard corresponding to the lens, control buttons, and push-pull button.

[0012] Furthermore, a tail cap is connected to the other end of the main housing. The tail cap has a feed hole on its outer side and a guide tube communicating with the feed hole on its inner side.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. This utility model uses a feeding wheel with protrusions and a bearing to clamp and convey consumables. The protrusions on the feeding wheel can effectively penetrate the surface of the consumables, providing a relatively stable driving force. The bearing is used as a driven component to press the consumables. This design significantly reduces the risk of friction reduction caused by dust accumulation on the transmission surface, solves the defects of consumable slippage and unstable conveying, and ensures the reliability and consistency of feeding.

[0015] 2. This utility model simplifies the core components of the feeding mechanism into four main parts: a geared motor, a transmission support, a feeding wheel, and a bearing. Power transmission is achieved through synchronous belt / chain drive. The overall structure is compact and has fewer parts, which effectively reduces the complexity of the mechanism and manufacturing costs. At the same time, the simplified structure also means fewer failure points, improving the overall operational reliability and service life of the equipment, and making maintenance easier. Attached Figure Description

[0016] Figure 1 This is a disassembly diagram of the internal structure of the main shell of this utility model. Figure 1 .

[0017] Figure 2 This is a disassembly diagram of the internal structure of the main shell of this utility model. Figure 2 .

[0018] Figure 3 This is a general schematic diagram of the present utility model. Figure 1 .

[0019] Figure 4 This is a general schematic diagram of the present utility model. Figure 2 .

[0020] Figure 5 This is a schematic diagram of the feeding mechanism in Embodiment 1 of this utility model. Figure 1 .

[0021] Figure 6 This is a schematic diagram of the feeding mechanism in Embodiment 1 of this utility model. Figure 2 .

[0022] Figure 7 This is a disassembly diagram of the feeding mechanism in Embodiment 1 of this utility model.

[0023] Figure 8 This is a schematic diagram of the feeding wheel structure of this utility model.

[0024] Figure 9 This is a schematic diagram of the feeding mechanism in Embodiment 2 of this utility model. Figure 1 .

[0025] Figure 10 This is a schematic diagram of the feeding mechanism in Embodiment 2 of this utility model. Figure 2 .

[0026] In the diagram, the correspondence between component names and drawing numbers is as follows:

[0027] 1. Main housing; 2. Pen tip; 3. Heating head fixing component; 4. Heating head; 5. Control main board; 6. Control switch; 7. Display screen; 8. Guide tube; 9. Feeding mechanism; 10. Tail cap;

[0028] 101. Top shell; 102. Bottom shell; 103. Lens cover; 104. Control buttons; 105. Slide-pull buttons; 106. Lens;

[0029] 901. Transmission bracket; 902. Gear motor; 903. Synchronous pulley one; 904. Synchronous belt; 905. Drive shaft; 906. Feeding wheel; 907. Bearing; 908. Synchronous pulley two;

[0030] 9061, feeding chute; 9062, protrusion;

[0031] 9031, sprocket one; 9041, chain; 9081, sprocket two. Detailed Implementation

[0032] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0033] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] Example 1:

[0036] As attached Figure 1 To be continued Figure 8 As shown, this utility model provides a three-dimensional molding device, including a main housing 1, with a feeding mechanism 9 installed inside the main housing 1; a pen tip 2 is connected to one end of the main housing 1, and a heating head 4 is installed inside the pen tip 2; the feeding mechanism 9 includes a transmission bracket 901 and a reduction motor 902; a feeding wheel 906 is rotatably mounted on one side of the transmission bracket 901, and a bearing 907 is rotatably mounted on the side near the feeding wheel 906, for clamping the raw material between the feeding wheel 906 and the bearing 907; the reduction motor 902 is connected to the feeding wheel 906 in a transmission connection; a feeding groove 9061 is provided on the outer circumferential surface of the feeding wheel 906, and multiple sets of protrusions 9062 are provided inside the feeding groove 9061. The protrusions 9062 are in the shape of cones, pyramids, etc., and can penetrate the surface of the consumables. They are arranged in a staggered manner to provide a more stable driving force and prevent slippage.

[0037] The geared motor 902 is fixedly installed on one side of the transmission bracket 901, and the motor shaft of the geared motor 902 passes through to the other side of the transmission bracket 901; the center of the feeding wheel 906 is fixedly installed with a transmission shaft 905, and the other end of the transmission shaft 905 is connected to the motor shaft. The design of the motor shaft passing through the transmission bracket 901, combined with the transmission shaft 905, constructs a stable and reliable power transmission foundation, ensuring that the power of the geared motor 902 is efficiently transmitted to the feeding wheel 906.

[0038] The motor shaft is fixedly connected to a first synchronous pulley 903, and the transmission shaft 905 is fixedly connected to a second synchronous pulley 908. A synchronous belt 904 connects the second synchronous pulley 908 and the first synchronous pulley 903, ensuring the accuracy and synchronization of power transmission. This makes the consumable conveying speed more stable and controllable. In addition, the synchronous belt 904 transmission has the characteristics of relatively low noise and smoother operation. At the same time, in practical applications, the first synchronous pulley 903 and the second synchronous pulley 908 can be set differently for flexibility and convenience. For example, when the diameter of the first synchronous pulley 903 is larger than the diameter of the second synchronous pulley 908, the transmission effect can be accelerated, which is conducive to quickly driving the consumables to move. When the diameter of the first synchronous pulley 903 is smaller than the diameter of the second synchronous pulley 908, the transmission effect can be reduced, and the output torque can be increased, which is conducive to stable delivery of consumables.

[0039] The main housing 1 has a heating head fixing component 3 fixedly installed at one end. The heating head 4 is installed at the bottom of the heating head fixing component 3. The heating head 4 is a ceramic head, consisting of a ceramic body (with a consumable channel inside) and a heating wire. The working temperature of the heating head 4 is 200-220℃. The pen tip 2 and the heating head fixing component 3 are made of high-temperature resistant PPS material with a temperature resistance of 260-280℃. Multiple sets of strip-shaped heat dissipation vents are symmetrically arranged on both sides of the pen tip 2. The transmission bracket 901 is installed inside the main housing 1 by fasteners. The bottom end of the transmission bracket 901 is provided with a connection hole, and a guide tube 8 is connected between the connection hole and the heating head fixing component 3. The design of the heating head fixing component 3 and the guide tube 8 provides a smooth and fixed guiding channel for the consumable from the clamping point of the feeding wheel 906 and the bearing 907 to the melting zone of the heating head 4, avoiding bending or deviation of the consumable during transportation, ensuring that the consumable can be accurately and stably fed into the heating head 4 for melting, and ensuring the smoothness of material output and molding accuracy.

[0040] The main housing 1 is composed of an upper housing 101 and a lower housing 102. Both the upper housing 101 and the lower housing 102 have mounting grooves on the side near the installation location of the transmission bracket 901. The two sets of mounting grooves are combined to form a mounting port. The mounting port is fitted with a lens cover 103. The splicing structure of the upper housing 101 and the lower housing 102 facilitates assembly and maintenance of internal components. The design of the lens cover 103 being fitted into the mounting port provides a window to observe the working status of the internal feeding mechanism 9, making it convenient for users to monitor the consumable delivery status and perform preliminary troubleshooting (such as whether there is a jam).

[0041] The upper shell 101 has a lens 106, a control button 104, and a push-pull button 105 installed on one side. The control motherboard 5 is installed on the inner side of the upper shell 101 by fasteners. The control motherboard 5 has a display screen 7, a power switch, and a control switch 6 respectively on one side corresponding to the lens 106, control button 104, and push-pull button 105. The lens 106 corresponds to the display screen 7, which provides users with intuitive feedback on the operation status. The control switch 6 is a linear potentiometer. The push-pull button 105 is slidably connected to the upper shell 101, and the inner side of the push-pull button 105 is fixedly connected to the slide handle of the control switch 6. The linear potentiometer has multiple ranges of linear adjustment function, which makes it easy to linearly adjust the feeding and discharging speed during use, effectively improving the ease of use of the equipment.

[0042] The other end of the main housing 1 is connected to a tail cover 10. The tail cover 10 has a feed hole on its outer side and a guide tube communicating with the feed hole on its inner side. The feed hole and the inner guide tube ensure that the consumables receive good initial guidance when they enter the device, and can smoothly travel along the predetermined path to the clamping area of ​​the feeding wheel 906 and the bearing 907, so as to avoid the consumables bending or getting stuck at the inlet and ensure the initial reliability of the feeding.

[0043] Example 2:

[0044] As attached Figure 9 and attached Figure 10 As shown, the difference from Example 1 is that:

[0045] A sprocket 9031 is fixedly connected to the end of the motor shaft, and a sprocket 9081 is fixedly connected to the end of the transmission shaft 905. A chain 9041 connects the sprocket 9081 and the sprocket 9031, replacing the synchronous belt 904 in Embodiment 1. The chain drive can also provide stable torque transmission capability and better durability, providing another reliable transmission solution for product design. In practical applications, the sprockets 9081 and 9031 can be set differently, which is flexible and convenient.

[0046] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A three-dimensional molding device, comprising a main housing (1), wherein a feeding mechanism (9) is installed inside the main housing (1); a pen tip (2) is connected to one end of the main housing (1), and a heating head (4) is installed inside the pen tip (2), characterized in that: The feeding mechanism (9) includes a transmission bracket (901) and a geared motor (902). A feeding wheel (906) is rotatably mounted on one side of the transmission bracket (901), and a bearing (907) is rotatably mounted on the side near the feeding wheel (906) for clamping the raw material between the feeding wheel (906) and the bearing (907). The geared motor (902) is connected to the feeding wheel (906) in a transmission. A feeding groove (9061) is provided on the outer circumferential surface of the feeding wheel (906), and multiple sets of protrusions (9062) are provided inside the feeding groove (9061).

2. The three-dimensional forming apparatus as described in claim 1, characterized in that: The center of the feeding wheel (906) is fixedly mounted with a drive shaft (905), and the other end of the drive shaft (905) is connected to the motor shaft for transmission.

3. The three-dimensional forming apparatus as described in claim 2, characterized in that: The end of the motor shaft is fixedly connected to a first synchronous pulley (903), the end of the transmission shaft (905) is fixedly connected to a second synchronous pulley (908), and a synchronous belt (904) is connected between the second synchronous pulley (908) and the first synchronous pulley (903).

4. The three-dimensional forming apparatus as described in claim 2, characterized in that: The motor shaft is fixedly connected to a sprocket one (9031), and the transmission shaft (905) is fixedly connected to a sprocket two (9081). A chain (9041) is connected between the sprocket two (9081) and the sprocket one (9031).

5. The three-dimensional forming apparatus as described in claim 1, characterized in that: A heating head fixing component (3) is fixedly installed at one end of the main housing (1), and the heating head (4) is installed at the bottom end of the heating head fixing component (3); the transmission bracket (901) is installed inside the main housing (1) by fasteners, and the bottom end of the transmission bracket (901) is provided with a connection hole, and a guide tube (8) is connected between the connection hole and the heating head fixing component (3).

6. The three-dimensional forming apparatus as described in claim 1, characterized in that: The main housing (1) is composed of an upper shell (101) and a lower shell (102) spliced ​​together. Both the upper shell (101) and the lower shell (102) are provided with mounting grooves on the side near the installation location of the transmission bracket (901). The two sets of mounting grooves are combined to form a mounting opening, and a lens cover (103) is fitted into the mounting opening.

7. The three-dimensional forming apparatus as described in claim 6, characterized in that: A lens (106), a control button (104), and a push-pull button (105) are installed on one side of the upper shell (101). A control motherboard (5) is installed on the inside of the upper shell (101) by fasteners. A display screen (7), a power switch, and a control switch (6) are respectively provided on one side of the control motherboard (5) corresponding to the lens (106), the control button (104), and the push-pull button (105).

8. The three-dimensional forming apparatus as described in claim 1, characterized in that: The other end of the main housing (1) is connected to a tail cap (10). The tail cap (10) has a feed hole on its outer side and a guide tube communicating with the feed hole on its inner side.

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