Double-screw-rod platform vertical lifting device

Abstract

The utility model relates to the field of mechanical transmission and automation equipment, in particular to a double-screw-rod platform vertical lifting device. The device comprises two lead screw modules of the same structure and a printing platform, each lead screw module is composed of a lead screw, a lead screw nut, a mounting base, a motor and a supporting base, the two ends of each lead screw are rotationally mounted on the corresponding supporting base, and each motor is in transmission connection with the corresponding lead screw through a synchronous belt and drives the corresponding lead screw to rotate; the lead screw nut is arranged on the lead screw in a sleeving mode, the lead screw nut and the lead screw form a spiral transmission pair, the installation base is fixed to the lead screw nut, and the printing platform is installed between the two lead screw modules through the flexible hinge piece. The flexible hinge pieces are evenly arranged at intervals, and it is ensured that the printing platform is evenly stressed and kept in the horizontal state in the vertical lifting process. In addition, a guide rail, a sliding block and a sensor are further arranged on the supporting base, and the stability and safety of the device are further improved. The technical effect of improving the vertical lifting precision and stability is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of mechanical transmission and automation equipment, in particular to a double-screw rod platform vertical lifting device. BACKGROUND

[0002] The present technology mainly relates to the field of 3D printing technology, especially to the field of platform vertical lifting device design of 3D printers. With the rapid development of 3D printing technology, 3D printers have become an important tool for manufacturing complex geometric parts. It has been widely used in many fields such as industrial production, medical health, cultural creativity, and has greatly promoted the digital transformation of manufacturing industry. However, with the continuous expansion of application scenarios and the increasing strictness of technical requirements, the existing platform vertical lifting device of 3D printers faces new challenges and needs further optimization and improvement.

[0003] In traditional 3D printers, it is common to use a single screw rod as the main driving mechanism for platform vertical lifting. This structure is simple and low in cost, so it has been widely used in early 3D printing equipment. In order to improve the stability and precision of vertical lifting, the industry usually takes the following measures: first, use higher strength and more wear-resistant materials to make the screw rod; second, improve the machining precision of the screw rod to reduce the motion error; third, increase auxiliary guide mechanisms such as guide rails and sliders to reduce the lateral deviation of the screw rod. In addition, some high-end devices are also equipped with high-precision servo motors and closed-loop control systems to better control the movement of the screw rod.

[0004] Although the above methods can improve the performance of the single-screw rod system to some extent, there are still obvious shortcomings. Especially for large-size or heavy-load printing platforms, the single-screw rod is prone to uneven stress due to cantilever arrangement, which causes the platform to tilt or shake during lifting, seriously affecting the printing quality and the reliability of the equipment. Therefore, how to overcome the inherent defects of the single-screw rod system has become a technical problem to be solved. CONTENT OF THE UTILITY MODEL

[0005] The purpose of the present application is to provide a double-screw rod platform vertical lifting device.

[0006] The above technical purpose of the present application is achieved by the following technical scheme: a double-screw rod platform vertical lifting device, comprising a first screw rod module and a second screw rod module, the first screw rod module and the second screw rod module are structurally identical, a printing platform is provided between the first screw rod module and the second screw rod module, a flexible hinge is provided on the first screw rod module and the second screw rod module, and the printing platform is installed on the first screw rod module and the second screw rod module through the flexible hinge.

[0007] By adopting the above technical scheme, the design of the double-screw rod module enables the load to be evenly shared, effectively improves the stability of the printing platform during vertical lifting compared with a single-screw rod structure, reduces tilting and shaking, and thus improves the printing precision; the flexible hinge piece is arranged to adapt to assembly and processing errors and complex working conditions, and plays a role of flexible buffering and self-adaptive adjustment, which not only ensures that the printing platform is uniformly stressed to maintain a horizontal state, but also protects the screw rod from damage caused by abnormal conditions such as choking, enhances the overall reliability and service life of the device, reduces maintenance costs and downtime, and provides a more reliable, stable and precise platform vertical lifting solution for 3D printing and other related applications.

[0008] Optionally, the first screw rod module comprises a screw rod, a screw rod nut, a mounting seat, a motor and a support seat, both ends of the screw rod are rotatably mounted on the support seat, the motor is in transmission connection with one end of the screw rod for driving the screw rod to rotate, the screw rod nut is sleeved on the screw rod and forms a screw transmission pair with the screw rod, the mounting seat is arranged on the screw rod nut, and the flexible hinge piece is connected with the mounting seat.

[0009] By adopting the above technical scheme, the motor drives the screw rod to rotate, and the screw transmission pair formed by the screw rod and the screw rod nut can convert the rotary motion of the motor into the linear motion of the screw rod nut, so as to drive the mounting seat and the printing platform connected therewith to realize precise vertical lifting, ensuring the controllability and accuracy of the lifting action; the screw rod is rotatably mounted at both ends on the support seat, providing reliable support for stable rotation of the screw rod, ensuring smooth transmission and reducing shaking and deviation; the mounting seat is arranged on the screw rod nut, which not only provides a stable connection point for the flexible hinge piece, so that the printing platform can work more stably with the screw rod module, but also this structure design is conducive to force transmission and dispersion, further improving the precision, stability and overall mechanical properties of the entire device during vertical lifting operation, improving the reliability and consistency of the printing platform operation, and meeting the needs of high-precision printing and other application scenarios.

[0010] Optionally, a guide rail is arranged on the support seat, and a sliding block is arranged on the guide rail and connected with the mounting seat.

[0011] By adopting the above technical scheme, the cooperation of the guide rail and the sliding block provides accurate guidance for the movement of the mounting seat, effectively limits the degree of freedom of the mounting seat during vertical lifting, so that it can only move stably along the direction of the guide rail, further enhances the linearity and stability of the lifting of the printing platform, greatly reduces the unstable factors such as lateral deviation that may be caused by the rotation of the screw nut, and simultaneously, the connection of the sliding block and the mounting seat makes the movement of the mounting seat more smooth, reduces the friction resistance, improves the transmission efficiency, reduces the energy loss, helps to prolong the service life of the device, and to a certain extent, also improves the adaptability of the printing platform to different loads and working environments, ensures that high-precision, stable and reliable vertical lifting actions can be realized under various working conditions, and effectively guarantees the quality and efficiency of the printing operation.

[0012] Optionally, the flexible hinge is provided with a plurality of flexible hinges, and the plurality of flexible hinges are uniformly and spacedly arranged.

[0013] By adopting the above technical scheme, the plurality of uniformly and spacedly arranged flexible hinges can jointly support and connect the printing platform and the screw rod module from multiple positions, so that the stress distribution of the printing platform during vertical lifting is more uniform, effectively avoids the problems of platform tilting and deformation caused by excessive local stress, and significantly improves the stability of the platform; when facing assembly errors, machining errors and complex working conditions, the plurality of flexible hinges can synergistically play the roles of flexible buffering and self-adaptive adjustment, better adapt to various working condition changes, further reduce the adverse effects of error accumulation on the operation of the device, thereby improving the precision of the movement of the printing platform, ensuring the smooth progress of the printing process, and also helping to protect the screw rod module and related components from abnormal stress damage, improving the reliability and durability of the entire device, prolonging the maintenance period of the device, reducing maintenance costs, and improving the comprehensive performance and working efficiency of the equipment.

[0014] Optionally, the printing platform is of a rectangular structure, and the four corner positions of the printing platform are respectively connected to the first screw rod module and the second screw rod module through the flexible hinge, so as to ensure that the printing platform is uniformly stressed during vertical lifting and maintains a horizontal state.

[0015] By adopting the above technical scheme, the printing platform with a rectangular structure is connected by flexible hinges at the four corners, fully utilizing the geometric characteristics of the rectangle, so that the printing platform can evenly distribute and effectively adjust the force in any direction during vertical lifting through the flexible hinges at the four corners. This layout ensures the force balance of the platform in all directions, effectively preventing tilting or distortion caused by uneven force, thereby stably maintaining the horizontal state. This is crucial for applications such as 3D printing, which requires high platform flatness, ensuring the accuracy and quality of the printed model, reducing the risk of printing failure or increased scrap rate due to uneven platform, improving production efficiency, reducing equipment wear and tear, extending equipment life, and improving the reliability and stability of the entire device in practical applications, providing a solid foundation for high-quality printing operations.

[0016] Optionally, the support seat is provided with a plurality of sensors.

[0017] By adopting the above technical scheme, the plurality of sensors provided on the support seat can monitor the running state of the device in real time. Precise positioning and motion control are achieved, further improving printing accuracy.

[0018] Optionally, the motor and the lead screw are connected by a synchronous belt drive.

[0019] By adopting the above technical scheme, the synchronous belt drive can achieve efficient power transmission between the motor and the lead screw, ensuring the timeliness and accuracy of the printing platform vertical lifting action, which helps to improve the overall work efficiency of the device. Secondly, the synchronous belt drive has a certain flexibility, which can to some extent buffer the impact generated when the motor starts and stops, reduce damage to the lead screw and other components, and prolong the service life of the device. Furthermore, the transmission ratio of the synchronous belt drive is relatively stable, which can accurately control the speed and rotation angle of the lead screw, thereby realizing precise control of the lifting height and speed of the printing platform, meeting the requirements of different printing tasks for accuracy and speed.

[0020] Optionally, the support seat is provided with a protective shell.

[0021] By adopting the above technical scheme, the wear, jamming or failure of the components are effectively prevented, ensuring that the internal parts of the device maintain normal operation, thereby improving the stability and reliability of the device operation, reducing downtime caused by unexpected situations, and improving production efficiency. The protective shell can to some extent protect the operator from accidental contact with moving parts during equipment operation, thereby preventing personal injury and enhancing the safety of equipment operation.

[0022] In summary, the present application includes at least one of the following beneficial technical effects:

[0023] 1. Motion stability and precision improvement: The double-screw rod structure design fundamentally solves the motion instability problem caused by single-screw rod cantilever, evenly shares the platform load, improves the stability and precision of the lifting process, and provides a reliable mechanical foundation for high-precision operation.

[0024] 2. Reliability enhancement: The flexible connection method of the platform hinge fully considers assembly and processing errors and complex working conditions, through flexible buffering and adaptive adjustment, effectively protects the screw rod from damage caused by abnormal conditions such as choking and motor failure, significantly improves the overall reliability and service life of the device, reduces maintenance costs and downtime.

[0025] 3. Safety enhancement: The power-off self-locking function of the motor with the reducer provides critical safety protection for the device in the event of power failure, avoiding equipment damage and safety accidents that may be caused by platform falling, ensuring the integrity of the equipment and the safety of personnel, making the device run more safely and reliably in various working conditions. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a structural schematic diagram of a double-screw rod platform vertical lifting device;

[0027] Figure 2 is a structural schematic diagram of a first screw rod module;

[0028] Figure 3 is a structural schematic diagram of a flexible hinge;

[0029] Figure 4 is a sectional view of the flexible hinge.

[0030] REFERENCE NUMERALS

[0031] 1. First screw rod module; 101. Screw rod; 102. Screw rod nut; 103. Mounting seat; 104. Motor; 105. Support seat; 106. Synchronous belt; 107. Guide rail; 108. Slide block; 2. Second screw rod module; 3. Printing platform; 4. Flexible hinge; 5. Sensor; 6. Protection shell. DETAILED DESCRIPTION

[0032] The present application will be further described in detail below in conjunction with the drawings.

[0033] Example 1

[0034] In this embodiment, refer to Figures 1-4The utility model provides a double -threaded rod platform vertical lifting device, including first threaded rod module 1 and second threaded rod module 2, first threaded rod module 1 and second threaded rod module 2 structure are same, and first threaded rod module 1 and second threaded rod module 2 are equipped with printing platform 3, and first threaded rod module 1 and second threaded rod module 2 are equipped with flexible hinge 4, and printing platform 3 is installed on first threaded rod module 1 and second threaded rod module 2 through flexible hinge 4.Effectively solved the problem of the motion instability caused by single-threaded rod 101 cantilever, improve the stability and precision of lifting process.

[0035] Specifically, refer to Figure 2 , first threaded rod module 1 includes threaded rod 101, threaded rod nut 102, mounting seat 103, motor 104 and support seat 105.Threaded rod 101 both ends are rotatably installed on support seat 105, and motor 104 is transmission connection with the one end of threaded rod 101, is used for driving threaded rod 101 rotation.Threaded rod nut 102 is set on threaded rod 101 and with threaded rod 101 forms screw transmission pair, and mounting seat 103 is equipped on threaded rod nut 102, and flexible hinge 4 is connected with mounting seat 103.Here, threaded rod 101 can adopt high-strength stainless steel material to improve its wear resistance and fatigue resistance, can also select aluminum alloy material to reduce weight and reduce manufacturing cost.Threaded rod nut 102 can select copper alloy material to reduce friction resistance and prolong service life.Mounting seat 103 can be fixed on threaded rod nut 102 by welding or screw, to ensure its stable and reliable.Flexible hinge 4 can adopt high-strength rubber material, has good elasticity and deformability, can effectively absorb vibration and impact, another alternative material is special elastic alloy, also has excellent buffering performance.

[0036] In addition, support seat 105 is equipped with guide rail 107, and guide rail 107 is equipped with sliding block 108, and sliding block 108 is connected with mounting seat 103.The role of guide rail 107 is to guide mounting seat 103 to move along the linear path, to further improve the stability of lifting process.Guide rail 107 can adopt linear rolling guide rail 107 to reduce friction loss, can also select ball guide rail 107, although the cost is higher, but the durability is strong.The matching mode of sliding block 108 and guide rail 107 can be embedded type, to ensure that sliding block 108 slides smoothly in guide rail 107, can also be clamping type, suitable for occasions needing larger bearing capacity.

[0037] Flexible hinge 4 is equipped with several, and several flexible hinges 4 are evenly spaced.Setting can ensure that printing platform 3 is stressed evenly in the vertical lifting process, maintains the horizontal state.For example, one flexible hinge 4 can be arranged at each of the four corner positions of printing platform 3, to make it correspondingly connected with first threaded rod module 1 and second threaded rod module 2.In addition, additional flexible hinge 4 can also be added in the middle position to further strengthen the stability of the platform.

[0038] The support base 105 is also provided with a plurality of sensors 5 for monitoring the running state and temperature change of the lead screw 101. The sensors 5 can be photoelectric sensors for detecting the position and speed of the lead screw 101, or thermistors for monitoring the temperature of the support base 105 to prevent overheating damage. The motor 104 is driven by the synchronous belt 106 between the lead screw 101, which not only ensures the transmission efficiency but also reduces the noise. The synchronous belt 106 can be a toothed belt with high transmission accuracy and long service life, or a flat belt with lower cost but requiring regular maintenance. The support base 105 is also provided with a protective shell 6 to prevent accidental contact by the operator and maintain the safety of the device.

[0039] The implementation principle of this embodiment is to fundamentally solve the problem of unstable movement caused by the overhang of the single lead screw 101 by designing a double lead screw 101 structure, evenly sharing the load, improving the stability and precision of the lifting process, and providing a reliable mechanical foundation for high-precision work. The flexible connection mode of the platform hinge fully considers the assembly and processing errors and complex working conditions, effectively protects the lead screw 101 from damage caused by abnormal conditions such as choking and motor 104 failure, significantly improves the overall reliability and service life of the device, reduces maintenance costs and downtime. The power-off self-locking function of the motor with the reducer provides critical safety protection for the device in the event of a power outage, avoiding equipment damage and safety accidents that may be caused by the platform falling, ensuring the integrity of the equipment and the safety of personnel, and making the device run more safely and reliably under various working conditions.

[0040] Embodiment 2

[0041] The difference between this embodiment and the above-mentioned embodiments is that the automatic leveling function is added based on the first lead screw module 1 and the second lead screw module 2. Specifically, a plurality of height sensors are provided on the printing platform 3, which are connected to the control system and monitor the height change of the platform in real time. When the height deviation of a certain area exceeds the preset value, the control system adjusts the speed of the corresponding lead screw 101 to restore the platform to a horizontal state. This automatic leveling mechanism is particularly suitable for large-size or heavy-load printing platforms 3, and can maintain the levelness of the platform during long-term continuous work, further improving the printing quality and the reliability of the equipment.

[0042] Specifically, the height sensor can adopt a laser range finder, which has high measurement accuracy and fast response speed; or an ultrasonic sensor, which has lower cost and wider application range. The control system can select a PLC controller or a microprocessor according to actual needs to achieve precise control of the rotation speed of the lead screw 101. In order to ensure the rapidity and stability of the leveling process, the lead screw 101 can be driven by a brushless DC motor, which has the characteristics of high efficiency and low noise, and is very suitable for precise control. At the same time, the surface of the lead screw 101 can be plated, such as chromium plating or nickel plating, to improve its wear resistance and corrosion resistance.

[0043] The implementation principle of this embodiment is to introduce a height sensor and a control system to realize the automatic leveling function of the platform, which not only greatly simplifies the operation process, but also maintains the levelness of the platform during long-term continuous work, thereby further improving the printing quality and the reliability of the equipment. Especially in large 3D printers, the automatic leveling function is particularly important, because manual adjustment often cannot achieve the required precision and consistency, while the automatic leveling mechanism can effectively solve this problem and significantly improve the overall performance of the equipment and user experience.

[0044] Embodiment 3

[0045] The difference between this embodiment and the above-mentioned embodiments is that a cooling system is added based on the first lead screw module 1 and the second lead screw module 2. Specifically, the support seat 105 is internally provided with a water cooling channel and externally provided with a heat sink. The cooling liquid is circulated and delivered to the water cooling channel by a water pump to carry away the heat generated by the lead screw 101 and the motor 104. This cooling system not only effectively reduces the temperature rise and prolongs the service life of the equipment, but also maintains stable performance in high-temperature environments.

[0046] Specifically, the cooling liquid can be pure water or glycol solution, the former has lower cost but is prone to scaling, and the latter has higher cost but is not prone to freezing and corroding the pipeline. The design of the water cooling channel can be spiral or straight, which can be flexibly selected according to actual needs. The heat sink can be made of aluminum material, which has good heat conductivity and lightweight advantage; or made of copper material, which has better heat dissipation effect although the cost is higher. The selection of the water pump is also important, and a small centrifugal pump is generally recommended, which is small in size and stable in flow. In order to avoid leakage of the cooling liquid, a sealing ring should be installed at the interface, and regular inspection and maintenance should be carried out.

[0047] The implementation principle of the embodiment is: by increasing the cooling system, the working temperature of the lead screw 101 and the motor 104 is effectively reduced, and the stability and reliability of the equipment are improved. Especially in high temperature environment or long time continuous working condition, the advantage of the cooling system is more obvious, which can significantly prolong the service life of the equipment, reduce the failure rate and improve the overall performance. This is particularly important for industrial 3D printers, because in harsh working environment, the stability and reliability of the equipment directly affect the production efficiency and product quality.

[0048] The embodiments of the specific implementation are the preferred embodiments of the present application, but do not limit the protection scope of the present application, so: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A twin-rod platform vertical lift device characterized by, The utility model provides a kind of double-screw module for 3D printer, including first screw module (1) and second screw module (2), the first screw module (1) and the second screw module (2) are identical in structure, and the first screw module (1) and the second screw module (2) are equipped with printing platform (3) between, and the first screw module (1) and the second screw module (2) are equipped with flexible hinge (4) on, and the printing platform (3) is installed on the first screw module (1) and the second screw module (2) by the flexible hinge (4).

2. A dual-rail platform vertical lift device according to claim 1, wherein, The first screw module (1) includes screw rod (101), screw nut (102), mounting seat (103), motor (104) and support seat (105), both ends of the screw rod (101) are rotatably installed on the support seat (105), the motor (104) is drivingly connected with one end of the screw rod (101), for driving the screw rod (101) to rotate, the screw nut (102) is sleeved on the screw rod (101) and forms screw transmission pair with the screw rod (101), the mounting seat (103) is arranged on the screw nut (102), and the flexible hinge (4) is connected with the mounting seat (103).

3. A dual-rail platform vertical lift device according to claim 2, wherein, The support seat (105) is provided with a guide rail (107), and the guide rail (107) is provided with a sliding block (108), and the sliding block (108) is connected with the mounting seat (103).

4. A dual-rail platform vertical lift device according to claim 1, wherein, The flexible hinge (4) is provided with a plurality of flexible hinges (4), and the plurality of flexible hinges (4) are uniformly and spacedly arranged.

5. A dual-rail platform vertical lift device according to claim 4, wherein, The printing platform (3) is of rectangular structure, and the printing platform (3) is connected with the first screw module (1) and the second screw module (2) through the flexible hinge (4) at four corner positions respectively, to ensure that the printing platform (3) is uniformly stressed during vertical lifting and maintains a horizontal state.

6. A dual-rail platform vertical lift device according to claim 2, wherein, The support seat (105) is provided with a plurality of sensors (5).

7. A dual-rail platform vertical lift device according to claim 2, wherein, The motor (104) and the screw rod (101) are driven by a synchronous belt (106).

8. A dual-rail platform vertical lift device according to claim 7, wherein, The support seat (105) is provided with a protective shell (6).

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