A heat dissipation device with a positioning mechanism for a 3D printer nozzle

Abstract

The present invention discloses a heat dissipation device with a positioning mechanism for a 3D printer nozzle, belonging to the technical field of 3D printing, comprising a shell and a material tube, a nozzle body is installed at the bottom of the material tube, a fixed tube is sleeved on the surface of the material tube, a first rotating seat and a second bevel gear are fixed on the outer wall of the fixed tube, and a second rotating seat is fixed on the outer wall of the material tube. The device reduces the vibration of the heat dissipation fan by the first damping spring and the second damping spring, so that the vibration of the nozzle body caused by the heat dissipation fan is greatly reduced, and the overall vibration of the nozzle body caused by the operation of the heat dissipation fan is prevented, thereby improving the printing effect.

Description

Technical Field

[0001] The invention belongs to the technical field of 3D printing, and in particular relates to a heat dissipation device of a 3D printer nozzle with a positioning mechanism. 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, 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 to make models in the fields of mold manufacturing and industrial design, and then gradually used for the direct manufacturing of some products. There are already parts printed using this technology. This technology has been used in jewelry, footwear, industrial design, architecture, engineering and construction (AEC), automobiles, aerospace, dental and medical industries, education, geographic information systems, civil engineering, firearms and other fields.

[0003] As one of the core components of 3D printers, the nozzle of a 3D printer determines the quality of molding to a large extent. The smoothness of the filament flowing out of the nozzle and the temperature of the filament directly affect the accuracy of 3D printing. However, if the temperature of the nozzle is too high, it will cause other components to dissolve and burn. At present, most of the nozzles of 3D printers on the market are connected to the nozzle and the heating aluminum block. The aluminum block is equipped with a heating tube and a thermocouple for heating and temperature measurement. A feed pipe is installed on the upper part, and a heat dissipation aluminum sheet is installed on the upper part of the feed pipe. A heat dissipation fan is installed on the aluminum sheet. However, this structure is easy to cause the overall vibration of the nozzle under the vibration of the heat dissipation fan, affecting the printing effect. In addition, the heat dissipation fan is fixed and can only effectively dissipate heat locally on the nozzle, reducing the heat dissipation effect. Summary of the invention

[0004] The purpose of the present invention is to provide a heat dissipation device with a positioning mechanism for a 3D printer nozzle, so as to solve the problem in the prior art proposed in the above background technology that the vibration of the heat dissipation fan during operation reduces the printing effect of the nozzle body and can only perform local heat dissipation.

[0005] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a heat dissipation device with a positioning mechanism for a 3D printer nozzle, comprising a shell and a material tube, a nozzle body is installed at the bottom of the material tube, a fixed tube is sleeved on the surface of the material tube, a first rotating seat and a second bevel gear are fixed on the outer wall of the fixed tube, a second rotating seat is fixed on the outer wall of the material tube, the shell is provided with two groups, and the sides of the first rotating seat and the second rotating seat are provided with receiving grooves matching the shell, and the two groups of the shells are engaged with the insides of the two groups of receiving grooves;

[0006] A controller is fixed inside the shell, a group of motors are fixedly connected to the surface of the shell by screws, the output end of the motor passes through the surface of the shell, a first bevel gear is fixed to the output end of the motor, the first bevel gear and the second bevel gear are meshed with each other, a shock absorbing mechanism is arranged on the surface of the fixed tube, a connecting plate is installed at one end of the shock absorbing mechanism, a cooling fan and a temperature sensor are fixed on the surface of the connecting plate, and a limiting mechanism is arranged at the bottom of the shell.

[0007] Preferably, the limiting mechanism includes a connecting rod, a telescopic sleeve, a ball and a limiting ring, a connecting rod is welded to the top of the limiting ring, the connecting rod is fixed to the bottom of the shell, a limiting groove is provided inside the limiting ring, a clamping groove is provided on the surface of the limiting ring, the clamping groove is communicated with the limiting groove, a telescopic sleeve is fixed on the surface of the connecting plate, a ball is fixed at one end of the telescopic sleeve, one end of the telescopic sleeve is engaged with the inside of the clamping groove, the ball is engaged with the inside of the limiting groove, and the size of the ball matches the limiting groove.

[0008] Preferably, the controller is connected to the motor, the cooling fan and the temperature sensor, and the controller, the motor, the cooling fan and the temperature sensor are connected to a power supply.

[0009] Preferably, the shock absorbing mechanism includes a first shock absorbing spring, a second shock absorbing spring, a fixed rod and a sliding rod, the fixed rod is connected to the surface of the fixed tube, a receiving cavity is provided inside the fixed rod, a second shock absorbing spring is fixed inside the receiving cavity, a groove is provided on the surface of the sliding rod, and the second shock absorbing spring is fixed to the inner wall of the groove.

[0010] Preferably, a sliding groove is formed on the inner wall of the accommodating cavity, and a sliding block is integrally formed on the surface of the sliding rod, and the sliding block is engaged with the inside of the sliding groove.

[0011] Preferably, a first shock-absorbing spring is fixed to the surface of the shell, one end of the first shock-absorbing spring is fixed to the surface of the connecting plate, and the first shock-absorbing spring is arranged on the outer wall of the shock-absorbing mechanism.

[0012] Preferably, a locking plate is hinged on the surface of one group of the shells, and a locking seat is fixed on the surface of another group of the shells. A locking groove matching the locking seat is opened on the surface of the locking plate, and the locking seat passes through the interior of the locking groove. A limiting bolt is threadedly connected to the surface of the locking seat.

[0013] Preferably, a bearing is fixed at the connection between the output end of the motor and the housing, and the inner wall of the bearing is fixed to the surface of the output end of the motor.

[0014] Technical effects and advantages of the present invention: The heat dissipation device of a 3D printer nozzle with a positioning mechanism proposed by the present invention has the following advantages compared with the prior art:

[0015] 1. The device uses the first damping spring and the second damping spring to dampen the cooling fan, so that the vibration of the cooling fan on the nozzle body is greatly reduced, and the overall vibration of the nozzle body caused by the operation of the cooling fan is prevented, thereby improving the printing effect;

[0016] 2. This device monitors the temperature of the nozzle body in real time through a temperature sensor. When the internal temperature of a certain part of the nozzle body rises, the controller controls the motor to drive the first bevel gear to rotate. The first bevel gear drives the cooling fan to rotate to the part with higher temperature through the second bevel gear and the fixed tube for heat dissipation, which greatly improves the heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a cross-sectional structural schematic diagram of the present invention;

[0018] Figure 2 For the present invention Figure 1 Schematic diagram of the enlarged structure of area A in the middle;

[0019] Figure 3 It is a schematic diagram of the connection structure of the housing of the present invention;

[0020] Figure 4 It is a schematic diagram of the side structure of the connecting plate of the present invention;

[0021] Figure 5 It is a cross-sectional structural schematic diagram of the shock absorbing mechanism of the present invention;

[0022] Figure 6 A block diagram of the present invention.

[0023] In the figure: 1. nozzle body; 2. fixing tube; 3. connecting rod; 4. first rotating seat; 5. shell; 6. controller; 7. material tube; 8. second rotating seat; 9. first bevel gear; 10. motor; 11. second bevel gear; 12. cooling fan; 13. connecting plate; 14. shock absorbing mechanism; 15. first shock absorbing spring; 16. telescopic sleeve; 17. ball; 18. limit ring; 19. locking plate; 20. locking seat; 21. temperature sensor; 22. second shock absorbing spring; 23. fixing rod; 24. slide groove; 25. sliding rod; 26. slider. DETAILED DESCRIPTION

[0024] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0025] The present invention provides Figure 1-6 A heat dissipation device with a positioning mechanism for a 3D printer nozzle is shown, comprising a housing 5 and a material pipe 7;

[0026] The nozzle body 1 is installed at the bottom of the material pipe 7, the fixed pipe 2 is sleeved on the surface of the material pipe 7, the first rotating seat 4 and the second bevel gear 11 are fixed to the outer wall of the fixed pipe 2, the second rotating seat 8 is fixed to the outer wall of the material pipe 7, and the shell 5 is provided with two groups, and the sides of the first rotating seat 4 and the second rotating seat 8 are provided with receiving grooves matching the shell 5, and the two groups of shells 5 are engaged in the inside of the two groups of receiving grooves. The first rotating seat 4 and the second rotating seat 8 can limit the shell 5 through the receiving grooves, and can also facilitate the rotation of the fixed pipe 2;

[0027] A controller 6 is fixed inside the shell 5, and a motor 10 is fixedly connected to the surface of a group of shells 5 by screws. The output end of the motor 10 runs through the surface of the shell 5, and a bearing is fixed at the connection between the output end of the motor 10 and the shell 5. The inner wall of the bearing is fixed to the output end surface of the motor 10. The bearing can reduce the friction at the connection between the output end of the motor 10 and the shell 5, thereby reducing the working load of the motor 10. A first bevel gear 9 is fixed at the output end of the motor 10, and the first bevel gear 9 and the second bevel gear 11 are meshed with each other. A shock absorbing mechanism 14 is provided on the surface of the fixed pipe 2, and a connecting plate 13 is installed at one end of the shock absorbing mechanism 14. A cooling fan 12 and a temperature sensor 21 are fixed on the surface of the connecting plate 13. A limiting mechanism is provided at the bottom of the shell 5. The motor 10 drives the first bevel gear 9 to rotate, and the first bevel gear 9 drives the fixed pipe 2 to rotate through the second bevel gear 11, so that the fixed pipe 2 drives the cooling fan 12 to rotate through the shock absorbing mechanism 14 and the connecting plate 13;

[0028] The limiting mechanism includes a connecting rod 3, a telescopic sleeve 16, a ball 17 and a limiting ring 18. The connecting rod 3 is welded on the top of the limiting ring 18, and the connecting rod 3 is fixed to the bottom of the housing 5. A limiting groove is provided inside the limiting ring 18, and a clamping groove is provided on the surface of the limiting ring 18. The clamping groove is connected to the limiting groove. The surface of the connecting plate 13 is fixed with a telescopic sleeve 16, and a ball 17 is fixed at one end of the telescopic sleeve 16. One end of the telescopic sleeve 16 is engaged with the inside of the clamping groove, and the ball 17 is engaged with the inside of the limiting groove. The size of the ball 17 matches the limiting groove. When the fixed tube 2 drives the connecting plate 13 to rotate through the shock absorbing mechanism 14, the connecting plate 13 drives the ball 17 to slide inside the limiting groove through the telescopic sleeve 16, so as to limit the connecting plate 13 in the horizontal direction.

[0029] The controller 6 is connected to the motor 10, the cooling fan 12 and the temperature sensor 21. The controller 6, the motor 10, the cooling fan 12 and the temperature sensor 21 are connected to the power supply. After receiving the signal from the temperature sensor 21, the controller 6 controls the motor 10 to stop and turns on the cooling fan 12 to dissipate heat for the nozzle body 1. When the temperature sensor 21 detects that the temperature inside the nozzle body 1 returns to normal, the controller controls the motor 10 to pneumatically operate and turns off the cooling fan 12.

[0030] The shock absorbing mechanism 14 includes a first shock absorbing spring 15, a second shock absorbing spring 22, a fixed rod 23 and a sliding rod 25. The fixed rod 23 is connected to the surface of the fixed tube 2. An accommodating cavity is provided inside the fixed rod 23. The second shock absorbing spring 22 is fixed inside the accommodating cavity. A groove is provided on the surface of the sliding rod 25. The second shock absorbing spring 22 is fixed to the inner wall of the groove. The first shock absorbing spring 15 is fixed to the surface of the housing 5. One end of the first shock absorbing spring 15 is fixed to the surface of the connecting plate 13. The first shock absorbing spring 15 is arranged on the outer wall of the shock absorbing mechanism 14. The first shock absorbing spring 15 can perform preliminary shock absorption on the cooling fan 12. A part of the vibration is transmitted to the sliding rod through the connecting plate 13. The sliding rod 25 squeezes the second shock absorbing spring 22 for further shock absorption.

[0031] A slide groove 24 is formed on the inner wall of the accommodating cavity, and a slider 26 is integrally formed on the surface of the sliding rod 25. The slider 26 is engaged in the inside of the slide groove 24. The sliding rod 25 squeezes the second shock absorbing spring 22. The second shock absorbing spring 22 can drive the slider 26 to move linearly on the inner wall of the slide groove 24, thereby limiting the sliding rod 25.

[0032] A locking plate 19 is hinged on the surface of one group of shells 5, and a locking seat 20 is fixed to the surface of the other group of shells 5. A locking groove matching the locking seat 20 is opened on the surface of the locking plate 19, and the locking seat 20 runs through the inside of the locking groove. The surface of the locking seat 20 is threadedly connected with a limiting bolt, and the two groups of shells 5 are connected by the locking plate 19 and the locking seat 20. The threaded connection has high strength, and the limiting bolt can prevent the locking plate 19 from detaching from the surface of the locking seat 20.

[0033] Working principle: When in use, turn on the switch of the motor 10, the motor 10 drives the first bevel gear 9 to rotate, the first bevel gear 9 drives the fixed tube 2 to rotate through the second bevel gear 11, so that the fixed tube 2 drives the cooling fan 12 to rotate through the shock absorbing mechanism 14 and the connecting plate 13. When the temperature sensor 21 detects that the temperature of a certain part inside the nozzle body 1 rises, the temperature sensor 21 transmits a signal to the controller 6, and the controller 6 controls the motor 10 to stop and turns on the switch of the cooling fan 12 to dissipate heat for the nozzle body 1;

[0034] When the cooling fan 12 is working, the vibration is transmitted to the shock absorbing mechanism 14 and the first shock absorbing spring 15 through the connecting plate 13. First, the first shock absorbing spring 15 performs preliminary shock absorption, and then the vibration is further damped by squeezing the second shock absorbing spring 22 through the sliding rod 25.

[0035] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A heat dissipation device for a 3D printer nozzle having a positioning mechanism, comprising a housing (5) and a material pipe (7), characterized in that: A nozzle body (1) is installed at the bottom of the material pipe (7), a fixed tube (2) is sleeved on the surface of the material pipe (7), a first rotating seat (4) and a second bevel gear (11) are fixed to the outer wall of the fixed tube (2), a second rotating seat (8) is fixed to the outer wall of the material pipe (7), and two groups of the shell (5) are provided, and the sides of the first rotating seat (4) and the second rotating seat (8) are provided with receiving grooves matching the shell (5), and the two groups of the shell (5) are engaged with the inside of the two groups of receiving grooves; A controller (6) is fixed inside the housing (5); a motor (10) is fixedly connected to the surface of the housing (5) by screws; an output end of the motor (10) passes through the surface of the housing (5); a first bevel gear (9) is fixed to the output end of the motor (10); the first bevel gear (9) and the second bevel gear (11) are meshed with each other; a shock absorbing mechanism (14) is provided on the surface of the fixed tube (2); a connecting plate (13) is installed at one end of the shock absorbing mechanism (14); a cooling fan (12) and a temperature sensor (21) are fixed to the surface of the connecting plate (13); and a limiting mechanism is provided at the bottom of the housing (5); The limiting mechanism comprises a connecting rod (3), a telescopic sleeve (16), a ball (17) and a limiting ring (18); the connecting rod (3) is welded to the top of the limiting ring (18); the connecting rod (3) is fixed to the bottom of the shell (5); a limiting groove is provided inside the limiting ring (18); a clamping groove is provided on the surface of the limiting ring (18); the clamping groove is connected to the limiting groove; the telescopic sleeve (16) is fixed to the surface of the connecting plate (13); a ball (17) is fixed to one end of the telescopic sleeve (16); one end of the telescopic sleeve (16) is engaged with the inside of the clamping groove; the ball (17) is engaged with the inside of the limiting groove; the size of the ball (17) matches the limiting groove.

2. A heat dissipation device with a positioning mechanism for a 3D printer nozzle according to claim 1, characterized in that: The controller (6) is connected to the motor (10), the cooling fan (12) and the temperature sensor (21); and the controller (6), the motor (10), the cooling fan (12) and the temperature sensor (21) are connected to a power source.

3. The heat dissipation device of a 3D printer nozzle with a positioning mechanism according to claim 1, characterized in that: The shock absorbing mechanism (14) comprises a first shock absorbing spring (15), a second shock absorbing spring (22), a fixed rod (23) and a sliding rod (25); the fixed rod (23) is connected to the surface of the fixed tube (2); a receiving cavity is provided inside the fixed rod (23); a second shock absorbing spring (22) is fixed inside the receiving cavity; a groove is provided on the surface of the sliding rod (25); the second shock absorbing spring (22) is fixed to the inner wall of the groove.

4. A heat dissipation device with a positioning mechanism for a 3D printer nozzle according to claim 3, characterized in that: The inner wall of the accommodating cavity is provided with a sliding groove (24), and the surface of the sliding rod (25) is integrally formed with a sliding block (26), and the sliding block (26) is engaged with the inside of the sliding groove (24).

5. The heat dissipation device of a 3D printer nozzle with a positioning mechanism according to claim 3, characterized in that: A first shock absorbing spring (15) is fixed to the surface of the housing (5), one end of the first shock absorbing spring (15) is fixed to the surface of the connecting plate (13), and the first shock absorbing spring (15) is arranged on the outer wall of the shock absorbing mechanism (14).

6. A heat dissipation device with a positioning mechanism for a 3D printer nozzle according to claim 1, characterized in that: A locking plate (19) is hingedly connected to the surface of one group of the shells (5), and a locking seat (20) is fixed to the surface of the other group of the shells (5). A locking groove matching the locking seat (20) is formed on the surface of the locking plate (19), and the locking seat (20) penetrates the interior of the locking groove. A limit bolt is threadedly connected to the surface of the locking seat (20).

7. The heat dissipation device with a positioning mechanism for a 3D printer nozzle according to claim 1, characterized in that: A bearing is fixed at the connection between the output end of the motor (10) and the housing (5), and the inner wall of the bearing is fixed to the surface of the output end of the motor (10).

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