Lifting device for crucible of single crystal furnace

Abstract

The utility model relates to a lifting device for a crucible of a single crystal furnace, which is structurally characterized in that magnetic fluid connected with the crucible is fixed in the center of a movable sliding seat, a plurality of linear bearings are uniformly embedded in the movable sliding seat, a guide rod is arranged in each linear bearing in a penetrating manner, and the upper ends and the lower ends of all the guide rods are respectively connected with a same upper connecting plate and a same lower connecting plate; the movable sliding seat is further connected with a lead screw nut, the lead screw nut is installed on a driving lead screw, the upper end of the driving lead screw is fixed to the upper connecting plate through a lead screw support, and the lower end of the driving lead screw is connected with the output end of a lead screw rotation driving motor fixed to the lower connecting plate. The utility model has the advantages that the cost can be effectively reduced, the stability of the decoupling strand is ensured, the three guide rods and the linear bearing form a sliding pair, a stable supporting platform is formed, a 2T crucible can be borne, the load mass center is designed at the center of the three supporting rods, the platform is reasonably stressed, and the load movement of the crucible is safe and stable. The time for assembling and adjusting the progress can be effectively shortened, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to a crucible lifting device for a single crystal furnace, belonging to the technical field of single crystal furnaces. Background Art

[0002] In the prior art, the up and down movement of the crucible in a single crystal furnace, that is, the crucible lifting assembly, generally adopts a column sliding table structure. Specifically, two linear guide pairs are fixed on one side of the column, and sliders are fixed on the crucible sliding seat. The relative movement between the sliders and the guide rails is used to realize the up and down movement of the crucible. The problems existing in this structure are as follows: The center of gravity of the crucible is arranged on one side of the column, which will generate a large overturning moment. In order to avoid the structural deformation caused by the moment and affect the up and down movement accuracy, only the rigid design of the column can be strengthened. The above problems directly lead to the increase of material and manufacturing costs, and the assembly steps are very complex.

[0003] With the gradual decline in the market demand for the number of single crystal furnaces, it is necessary to control the cost of single crystal furnace products, reduce costs on the premise of ensuring reliable performance, and improve the degree of automation. The crucible lifting assembly is one of the most important component devices of a single crystal furnace and is the basic guarantee for the stable liquid level during crystal pulling. How to reduce costs on the premise of ensuring the lifting stability of the crucible is an important research and development direction in recent years. Summary of the Utility Model

[0004] The single crystal furnace crucible lifting device proposed by the utility model aims to overcome the above-mentioned deficiencies existing in the prior art, effectively reduce costs, and ensure stable production.

[0005] The technical solution of the utility model: A single crystal furnace crucible lifting device, the structure of which includes a guide rod, a driving lead screw, a magnetorheological fluid, a moving slide, and a lead screw rotating drive motor. Among them, the magnetorheological fluid connecting the crucible is fixed at the center of the moving slide. A number of linear bearings are evenly embedded in the moving slide, and a guide rod is inserted through each linear bearing. The upper and lower ends of all the guide rods are respectively connected to the same upper connection plate and the same lower connection plate. The moving slide is also connected to a lead screw nut, and the lead screw nut is installed on the driving lead screw. The upper end of the driving lead screw is fixed on the upper connection plate through a lead screw support, and the lower end of the driving lead screw is connected to the output end of the lead screw rotating drive motor fixed on the lower connection plate. The lead screw rotating drive motor drives the driving lead screw to rotate, the lead screw nut moves up and down, the lead screw nut is fixed on the moving slide, and the moving slide carries the crucible up and down. The guide rod plays a role of support and guidance. The linear bearings embedded in the moving slide and the guide rod can ensure smooth and stable up and down movement and have good overall rigidity.

[0006] Preferably, three linear bearings are symmetrically embedded in the moving slide with the magnetorheological fluid as the center. This structure can meet the requirements of structural stability.

[0007] Preferably, the lower connecting plate is fixed to the foundation through threaded holes, which can further ensure the structural stability.

[0008] Advantages of the present utility model: The structural design is simple and reasonable, which can effectively reduce costs and ensure the stability of decoupling. By using three guide rods and linear bearings to form a sliding pair, a stable support platform is constituted, which can carry a 2T crucible. The center of mass of the load is designed at the center of the three support rods, and the platform is stressed reasonably, so the movement of the crucible load is safe and stable. It can effectively reduce the time for assembly and adjustment progress and improve production efficiency. Brief Description of the Drawings

[0009] Figure 1 It is the front view structural schematic diagram of the crucible lifting device of the single crystal furnace of the present utility model.

[0010] Figure 2 It is the side view structural schematic diagram of the crucible lifting device of the single crystal furnace of the present utility model.

[0011] Figure 3 It is the top view structural schematic diagram of the crucible lifting device of the single crystal furnace of the present utility model.

[0012] In the figure, 1 is the upper connecting plate, 2 is the guide rod, 3 is the driving lead screw, 4 is the magnetorheological fluid, 5 is the moving slide, 6 is the lower connecting plate, 7 is the lead screw rotation driving motor, and 8 is the lead screw support. Detailed Description of the Preferred Embodiment

[0013] The present utility model will be further described in detail below in conjunction with the embodiments and specific implementation manners.

[0014] As Figures 1-3 shown, a crucible lifting device for a single crystal furnace, the structure of which includes a guide rod 2, a driving lead screw 3, a magnetorheological fluid 4, a moving slide 5 and a lead screw rotation driving motor 7. Among them, the magnetorheological fluid 4 connecting the crucible (not shown) is fixed at the center of the moving slide 5. Three linear bearings are symmetrically embedded in the moving slide 5 with the magnetorheological fluid 4 as the center. A guide rod 2 is inserted through each linear bearing. The upper and lower ends of the three guide rods 2 are respectively connected to the same upper connecting plate 1 and the same lower connecting plate 6. The lower connecting plate 6 is fixed to the foundation through threaded holes. The upper connecting plate 1, the three guide rods 2 and the lower connecting plate 6 are assembled into a stable support carrier. The moving slide 5 is also connected to a lead screw nut, and the lead screw nut is installed on the driving lead screw 3. The upper end of the driving lead screw 3 is fixed to the upper connecting plate 1 through the lead screw support 8, and the lower end of the driving lead screw 3 is connected to the output end of the lead screw rotation driving motor 7 fixed to the lower connecting plate 6.

[0015] According to the above structure, during operation, the screw rotates to drive the motor 7 to drive the driving screw 3 to rotate, and the screw nut moves up and down. The screw nut is fixed on the moving slide 5, and the moving slide 5 carries a 2T crucible to move up and down. The three guide rods 2 play a supporting role and also a guiding role. The linear bearing is embedded inside the moving slide 5, and the friction between it and the guide rod 2 is small. The up and down movement is stable and smooth, and it has good overall rigidity.

[0016] The above-mentioned components are all prior arts, and those skilled in the art can use any models and existing designs that can achieve their corresponding functions.

[0017] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the inventive concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A single crystal furnace crucible lifting device, characterized in that: The invention comprises a guide rod (2), a driving lead screw (3), a magnetic fluid (4), a movable slide seat (5) and a lead screw rotation driving motor (7), wherein the magnetic fluid (4) connected to the crucible is fixed at the center of the movable slide seat (5), a plurality of linear bearings are evenly embedded in the movable slide seat (5), each linear bearing is penetrated by a guide rod (2), the upper and lower ends of all the guide rods (2) are respectively connected to the same upper connecting plate (1) and the same lower connecting plate (6), the movable slide seat (5) is also connected to a lead screw nut, the lead screw nut is mounted on the driving lead screw (3), the upper end of the driving lead screw (3) is fixed to the upper connecting plate (1) through a lead screw support (8), and the lower end of the driving lead screw (3) is connected to the output end of the lead screw rotation driving motor (7) fixed to the lower connecting plate (6).

2. A single crystal furnace crucible lifting device as claimed in claim 1, characterized in that: The movable slide seat (5) has three linear bearings embedded in a centrally symmetrical manner with the magnetic fluid (4) as the center.

3. A single crystal furnace crucible lifting device as claimed in claim 1 or 2, characterized in that: The lower connecting plate (6) is fixed on the foundation via threaded holes.

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