3D printed transmission mechanism

Abstract

The present invention relates to the technical field of 3D printing, and discloses a 3D printing transmission mechanism, including a base, a horizontal platform and three supporting shafts fixed on the base, and the three supporting shafts are distributed in a triangular shape, and sliders are provided on the supporting shafts, and motors fixed on the base are respectively provided below the sliders, and a rotating shaft is provided on the output shaft of the motor, and the rotating shaft is threadedly connected with the slider; a hinged rod is provided between the horizontal platform and the slider, one end of the hinged rod is hinged with the horizontal platform, and the other end of the hinged rod is hinged with the slider, a nozzle for conveying materials is fixed at the bottom of the horizontal platform, a cavity is provided in the horizontal platform, and a plurality of grooves are provided in the cavity, and a film for closing the groove is provided on the upper part of the groove, and water is placed on the film, and a pressure sensor is fixed at the bottom of the groove, and a microprocessor is fixed on the base, and the pressure sensor is electrically connected to the microprocessor, and the microprocessor is electrically connected to the motor. The present invention has a simple structure and can adjust the horizontal platform horizontally during printing.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D printing, and in particular to a 3D printing transmission mechanism. Background Art

[0002] 3D printing (3DP) is a type of rapid prototyping technology. It is a technology that uses digital model files as the basis, uses powdered metal or plastic and other bondable materials to construct objects by printing layer by layer. 3D printing is usually achieved using digital technology material printers. It is often used in mold manufacturing, industrial design and other fields to make models, and then gradually used for direct manufacturing of some products. There are already parts printed using this technology. This technology is used in jewelry, footwear, industrial design, architecture, engineering and construction (AEC), automobiles and other fields.

[0003] The stability of the nozzle in 3D printing has an important impact on printing. During the printing process, the nozzle will vibrate to a certain extent and cause deviation, which will cause errors in the parts of the printed product. The traditional adjustment method is to use an automatic leveling device to balance the nozzle before printing, and then use the transmission mechanism to stabilize the movement to avoid vibration, so as to stabilize the nozzle. However, in fact, the nozzle will always vibrate during the printing process, and the automatic leveling device needs a plane support to level it. However, the automatic leveling device cannot be supported during the 3D printing process, so leveling cannot be achieved. Summary of the invention

[0004] The present invention is intended to provide a 3D printing transmission mechanism to solve the problem that the existing 3D printing mechanism cannot automatically level itself during the printing process.

[0005] To achieve the above object, the technical solution of the present invention is: a 3D printing transmission mechanism, comprising a base, a horizontal platform and three support shafts fixed on the base, and the three support shafts are distributed in a triangular shape, and sliders are sleeved on the support shafts, and motors fixed on the base are respectively arranged below the sliders, and a rotating shaft is arranged on the output shaft of the motor, and the rotating shaft is threadedly connected to the slider;

[0006] A hinged rod is provided between the horizontal platform and the slider, one end of the hinged rod is hinged to the horizontal platform, and the other end of the hinged rod is hinged to the slider. A nozzle for conveying materials is fixed to the bottom of the horizontal platform, a cavity is provided in the horizontal platform, a plurality of grooves are provided in the cavity, a film for closing the grooves is provided on the upper part of the grooves, water is placed on the film, a pressure sensor is fixed to the bottom of the groove, a microprocessor is fixed on the base, the pressure sensors are electrically connected to the microprocessor, and the microprocessor is electrically connected to the motor.

[0007] The principle of the present invention is as follows: three support columns form a triangle, and the hinged rod is hinged on the horizontal platform and also forms a triangle to support the horizontal platform, thereby stabilizing the horizontal platform. The motor drives the shaft to rotate in the positive direction, and the shaft drives the slider to slide upward under the action of the thread. At this time, the nozzle transports the material and the nozzle sprays the material for 3D printing. The motor drives the shaft to rotate in the reverse direction, and the shaft drives the slider to slide downward and reset under the action of the thread.

[0008] The water placed on the film will squeeze the gas in the groove through the film to change the air pressure. The pressure sensor will detect the change in air pressure in the groove, and the pressure sensor will send a signal to the microprocessor. The microprocessor will make a judgment based on the signal, and the microprocessor will send a signal to the motor. The microprocessor will adjust the rotation speed of the motor, thereby adjusting the sliding speed of the slider. The slider drives the articulated rod to adjust the position of the horizontal platform to make the horizontal platform level.

[0009] The beneficial effects of the present invention are as follows: 1. When the nozzle sprays out materials, the horizontal platform will be offset due to vibration and cannot be level, which will lead to poor 3D printing effect. The air pressure in the groove is squeezed by water through the film, and the horizontality of the horizontal platform is determined according to the different air pressures in the groove. The pressure sensor will detect the pressure change in the groove, and the pressure sensor will send a signal to the microprocessor, which controls the motor to drive the slider to fine-tune the horizontal platform. Compared with the prior art, the horizontal platform can be fine-tuned during the 3D printing process, so that the horizontal platform is in a horizontal state, so that the material sprayed out by the nozzle can be stably printed and formed, and there is no need to use an automatic leveling device for leveling between printing, which improves work efficiency, and adjusts the horizontal platform in real time to ensure the quality of 3D printing.

[0010] Furthermore, a slideway is vertically arranged on the support shaft, the slider is slidably connected to the support shaft through the slideway, and a ball bearing that cooperates with the slider is arranged in the slideway. The slideway facilitates the sliding of the slider and guides the slider, while the ball bearing facilitates the sliding of the slider.

[0011] Furthermore, a push rod is fixed below the slider away from the hinged rod, a recovery chamber below the push rod is provided on the support shaft, a slide plate is slidably connected in the recovery chamber, the slide plate is fixedly connected to the push rod, an oil hole connected to the slide is provided in the recovery chamber, an oil inlet check valve is provided in the oil hole, the liquid inlet end of the oil inlet check valve faces the slide, and the liquid outlet end of the oil inlet check valve faces the recovery chamber. When the slider slides downward, the push rod will push the slide plate, and the slide plate will squeeze the space in the recovery chamber. When the slide plate slides upward, the slider will drive the push rod to slide upward, and the push rod will drive the slide plate to slide upward, so that the recovery chamber works like an air pump and sucks oil through the oil inlet check valve.

[0012] Furthermore, an oil tank connected to the slideway is fixed on the support shaft, and an oil outlet check valve connected to the oil tank is provided on the side wall of the recovery chamber, the oil inlet end of the oil outlet check valve faces the recovery chamber, and the oil outlet end of the oil outlet check valve faces the oil tank. The oil in the oil tank flows into the slideway to lubricate the ball bearings, and the excess oil is recovered by the recovery chamber. And the excess oil will enter the oil tank through the oil outlet check valve to circulate the oil.

[0013] Furthermore, a sponge layer is fixed on the horizontal platform. Alcohol can be sprinkled on the sponge layer, and the alcohol can dissipate heat from the horizontal platform and the nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a top view of the overall structure of the 3D printing transmission mechanism according to an embodiment of the present invention;

[0015] Figure 2 A side view of a support shaft according to an embodiment of the present invention;

[0016] Figure 3 It is a schematic structural diagram of a horizontal platform according to an embodiment of the present invention. DETAILED DESCRIPTION

[0017] The following is further described in detail through specific implementation methods:

[0018] The figure marks in the drawings of the specification include: base 1, horizontal platform 2, groove 21, film 22, pressure sensor 23, support shaft 3, oil tank 31, ball 32, slideway 33, slider 4, hinge rod 5, rotating shaft 6, motor 7, oil hole 8, recovery chamber 9, oil outlet one-way valve 10, oil pipe 11, slide plate 12, push rod 13, and nozzle 14.

[0019] Example:

[0020] Basically as attached Figure 1 As shown, a 3D printing transmission mechanism comprises a base 1, a support shaft 3 and a horizontal platform 2. Three support shafts 3 are provided, and the three support shafts 3 are distributed in a triangular shape, and each support shaft 3 is provided with a slider 4, and a hinge rod 5 is provided between the slider 4 and the horizontal platform 2, and there are two hinge rods 5, one end of the hinge rod 5 is hinged to the horizontal platform 2, and the other end of the hinge rod 5 is hinged to the corresponding slider 4.

[0021] like Figure 2As shown, an oil tank 31 is fixed on the top of the support shaft 3, a slideway 33 connected to the oil tank 31 is provided on the support shaft 3, and a ball 32 is provided between the slider 4 and the slideway 33. The ball 32 cooperates with the slider 4 to facilitate the slider 4 to slide on the slideway 33. A motor 7 fixed to the base 1 is provided below the slider 4. The motor 7 is fixed to the base 1 by bolts to stabilize the motor 7. The motor 7 is a stepper motor or a servo motor. The servo motor is selected in this embodiment. A rotating shaft 6 is fixed to the output shaft of the motor 7, and the rotating shaft 6 is threadedly connected to the slider 4. A push rod 13 is mortised at the lower right side of the slider 4, and a slide plate 12 is welded to the lower end of the push rod 13. A recovery chamber 9 connected to the slideway 33 is provided on the support shaft 3. Specifically, an oil hole 8 is provided on the left side of the recovery chamber 9, and the recovery chamber 9 is connected to the slideway 33 through the oil hole 8. An oil inlet check valve is fixed in the oil hole 8, and the oil inlet end of the oil inlet check valve is connected to the slideway 33, and the oil outlet end of the oil inlet check valve is connected to the recovery chamber 9 (not shown in the figure). An oil outlet check valve 10 is fixed on the right side of the recovery chamber 9, and the oil inlet end of the oil outlet check valve 10 faces the recovery chamber 9. The oil outlet end of the oil outlet check valve 10 is connected to an oil pipe 11, and the upper end of the oil pipe 11 is connected to the oil tank 31.

[0022] As attached Figure 3 As shown, a nozzle 14 is fixed at the bottom of the horizontal platform 2, a sponge layer is fixed at the bottom of the horizontal platform 2, and the sponge layer is located at the periphery of the nozzle 14 (not shown in the figure), a cavity is also provided in the horizontal platform 2, five grooves 21 are provided in the cavity, and a film 22 for closing the groove 21 is provided on the groove 21, water is placed on the film 22, and a pressure sensor 23 of model: MIK-P300 is fixed at the bottom of the groove 21, a microprocessor electrically connected to the pressure sensor 23 is fixed on the base 1, and the motor 7 is electrically connected to the microprocessor (not shown in the figure), and the model of the microprocessor is: STM32F429IGT6.

[0023] The specific implementation process is as follows:

[0024] When performing 3D printing, the oil tank 31 is opened and the motor 7 is started. The oil in the oil tank 31 enters the slideway 33, and the oil enters the slideway 33 to lubricate the ball bearings 32, so that the slider 4 can slide smoothly in the slideway 33 through the ball bearings 32, thereby preventing the slider 4 from vibrating due to excessive friction and generating a large resistance.

[0025] The output shaft of the motor 7 will drive the shaft 6 to rotate in the forward direction, and the shaft 6 will drive the slider 4 to slide upward. The upward sliding of the slider 4 will bring the horizontal platform 2 upward through the hinge rod 5, and the nozzle 14 will spray the material for printing. During printing, it is inevitable that the horizontal platform 2 will vibrate when it moves due to the force of the material sprayed by the nozzle 14. The vibration will cause the horizontal platform 2 to tilt. At this time, the water in the film 22 will flow in the tilted direction, which will change the pressure in the groove 21. For example, the horizontal platform 2 tilts to the left, and the water will be concentrated in the left groove 21. The pressure sensor 23 of the left groove 21 will detect the change in pressure in the groove 21, and the pressure sensor 23 will transmit the pressure signal to the microprocessor, as shown in the attached figure. Figure 1 As shown, the microprocessor will control the motor 7 on the left side near the support shaft 3 to increase the speed of the motor 7, thereby increasing the speed at which the slider 4 slides upward, and the slider 4 slides upward quickly with the hinge rod 5, and the hinge rod 5 shifts the left side of the horizontal platform 2 upward, and makes the left and right sides of the horizontal platform 2 in the same horizontal plane. When the horizontal platform 2 is horizontal, the pressure in the left groove 21 changes to the initial state, and the pressure sensor 23 transmits the pressure signal to the microprocessor, and the microprocessor controls the speed of the motor 7 on the left to resume, so that the speed of the motor 7 is the same, and the sliding speed of the slider 4 is the same. In this way, during the 3D printing process, the horizontal platform 2 is fine-tuned to keep the horizontal platform 2 level.

[0026] When the slider 4 slides upward, the slider 4 will drive the push rod 13 to slide upward, and the push rod 13 will drive the slide plate 12 to slide upward. The recovery chamber 9 will work like an air pump, and the recovery chamber 9 will suck the excess oil in the slideway 33 into the recovery chamber 9 through the oil inlet check valve. After the 3D printing is completed, the start motor 7 drives the shaft 6 to rotate in the opposite direction, the shaft 6 slides downward with the slider 4, the slider 4 slides downward with the push rod 13, and the push rod 13 pushes the slide plate 12 downward, and the slide plate 12 squeezes the oil in the recovery chamber 9 through the oil outlet check valve 10 and the oil pipe 11 into the oil tank 31. When the nozzle 14 needs to be cooled, alcohol is sprinkled on the sponge layer, and the sponge layer can absorb the alcohol, and the alcohol will evaporate at room temperature, and the alcohol volatilization will take away a lot of heat, so the nozzle 14 is cooled.

[0027] The above are only preferred embodiments of the present invention. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention, which should also be regarded as the protection scope of the present invention, and will not affect the effect of the implementation of the present invention and the practicality of the patent. The technology, shape, and structural parts omitted in the present invention are all well-known technologies.

Claims

1.3D printing transmission mechanism, characterized by: It includes a base, a horizontal platform and three supporting shafts fixed on the base, and the three supporting shafts are distributed in a triangular shape. Sliders are arranged on the supporting shafts, and motors fixed on the base are arranged below the sliders. A rotating shaft is arranged on the output shaft of the motor, and the rotating shaft is threadedly connected to the slider; a hinged rod is arranged between the horizontal platform and the slider, one end of the hinged rod is hinged to the horizontal platform, and the other end of the hinged rod is hinged to the slider, a cavity is arranged in the horizontal platform, and a plurality of grooves are arranged in the cavity, and a film for closing the groove is arranged on the upper part of the groove, and water is placed on the film, and a pressure sensor is fixed at the bottom of the groove, and a microprocessor is fixed on the base, and the pressure sensor is electrically connected to the microprocessor, and the microprocessor is electrically connected to the motor; A slideway is vertically arranged on the support shaft, the slider is slidably connected to the support shaft through the slideway, and a ball bearing that cooperates with the slider is arranged in the slideway; A push rod is fixed below the slider away from the hinge rod, a recovery chamber is provided on the support shaft and is located below the push rod, a slide plate is slidably connected in the recovery chamber, the slide plate is fixedly connected to the push rod, an oil hole connected to the slideway is provided on the side wall of the recovery chamber, an oil inlet check valve is provided in the oil hole, a liquid inlet end of the oil inlet check valve faces the slideway, and a liquid outlet end of the oil inlet check valve faces the recovery chamber; An oil tank connected to the slideway is also fixed on the support shaft, and the recovery chamber is provided with an oil outlet check valve connected to the oil tank, the oil inlet end of the oil outlet check valve faces the recovery chamber, and the oil outlet end of the oil outlet check valve faces the oil tank; A nozzle for conveying materials is fixed at the bottom of the horizontal platform, and a sponge layer is fixed at the bottom of the horizontal platform, and the sponge layer is located at the periphery of the nozzle.

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