Three-linkage mechanism for stably lifting lower furnace cover

Abstract

The utility model relates to a three-linkage mechanism for stably lifting a lower furnace cover, which is technically characterized in that a first right-angle converter, a second right-angle converter and a third right-angle converter are respectively fixed at the tops of three vertical brackets, and the horizontal input ends of the first right-angle converter, the second right-angle converter and the third right-angle converter are connected with a servo motor through a synchronous transmission mechanism; the vertical output end of the first right-angle converter is connected with the upper end of the first longitudinal lead screw, the vertical output end of the second right-angle converter is connected with the upper end of the second longitudinal lead screw, and the vertical output end of the third right-angle converter is connected with the upper end of the third longitudinal lead screw. The first longitudinal lead screw, the second longitudinal lead screw and the third longitudinal lead screw are respectively provided with a nut, the three nuts correspond to the three connecting pieces in a one-to-one mode and are fixedly connected with the three connecting pieces, longitudinal guide rails parallel to the first longitudinal lead screw, the second longitudinal lead screw and the third longitudinal lead screw are arranged on the vertical support, and sliding blocks matched with the longitudinal guide rails are arranged on the connecting pieces. The mechanism is convenient to assemble and drives the lower furnace cover to lift stably.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum furnaces, in particular to a three-link mechanism for smoothly lifting and lowering a lower furnace cover. Background Art

[0002] With the continuous maturity of vacuum metallurgy and vacuum heat treatment processes, the corresponding ultra-high vacuum furnaces are also developing towards economy, scale and large-scale. Because each furnace processes a lot of materials, the mass is large, and the position in the vacuum chamber is compact, loading and unloading becomes one of the difficulties. At present, there are two ways to load materials in vacuum furnaces: horizontal method and vertical method, which are mainly determined by the furnace chamber layout, material form and process requirements. Among them, lower loading is easier to operate than upper loading, and the loading process is relatively smooth. However, the lower loading method requires the installation of a crucible outside the cavity, and generally the material needs to be placed on the lower furnace cover, so the smooth lifting and lowering of the lower furnace cover is the guarantee for loading.

[0003] However, the existing opening and closing structure of the lower furnace cover has the following problems: difficulty in assembly, easy eccentricity, difficulty in centering, small bearing capacity, and unstable movement. Utility Model Content

[0004] The utility model aims to provide a three-linkage mechanism for smoothly lifting and lowering the lower furnace cover, which is reasonable in structure and reliable in use, and is easy to assemble and can drive the lower furnace cover to lift smoothly.

[0005] The technical solution of the utility model is:

[0006] A three-linkage mechanism for smoothly lifting and lowering a lower furnace cover comprises a stand on which a vacuum furnace is located, three connecting pieces fixed to the bottom surface of the lower furnace cover, and three vertical brackets evenly arranged on the stand around the center line of the lower furnace cover, wherein the three connecting pieces are evenly arranged around the center line of the lower furnace cover, and the technical key points are as follows: a first right-angle converter, a second right-angle converter, and a third right-angle converter are respectively fixed on the tops of the three vertical brackets, the horizontal input ends of the first right-angle converter, the second right-angle converter, and the third right-angle converter are connected to a servo motor by a synchronous transmission mechanism, and the first right-angle converter is connected to the servo motor by a synchronous transmission mechanism. The vertical output end of the converter is connected to the upper end of the first longitudinal screw, the vertical output end of the second right-angle converter is connected to the upper end of the second longitudinal screw, and the vertical output end of the third right-angle converter is connected to the upper end of the third longitudinal screw. The first longitudinal screw, the second longitudinal screw and the third longitudinal screw are respectively provided with nuts, and the three nuts correspond to the three connecting parts one by one and are connected and fixed. The vertical bracket is provided with a longitudinal guide rail parallel to the first longitudinal screw, the second longitudinal screw and the third longitudinal screw, and the connecting part is provided with a slider that cooperates with the longitudinal guide rail.

[0007] The above-mentioned three-linkage mechanism for smoothly lifting and lowering the lower furnace cover, the synchronous transmission mechanism includes a first transmission box connected to the output end of the servo motor, a first transmission shaft connected to the first horizontal output end of the first transmission box, a second transmission shaft connected to the second horizontal output end of the first transmission box, a third transmission shaft coaxial with the second transmission shaft, a second transmission box connected to the end of the third transmission shaft, and a fourth transmission shaft connected to the horizontal output end of the second transmission box, the first transmission shaft is connected to the horizontal input end of the first right-angle converter, the second transmission shaft is connected to the horizontal input end of the second right-angle converter, and the fourth transmission shaft is connected to the horizontal input end of the third right-angle converter.

[0008] The above-mentioned three-linkage mechanism for smoothly lifting and lowering the lower furnace cover, the vertical bracket is provided with bearing assemblies corresponding to the first longitudinal lead screw, the second longitudinal lead screw and the third longitudinal lead screw.

[0009] The beneficial effects of the utility model are:

[0010] 1. The servo motor drives the three first longitudinal lead screws, the second longitudinal lead screw and the third longitudinal lead screw to rotate synchronously through the synchronous transmission mechanism, the first right-angle converter, the second right-angle converter and the third right-angle converter, and then drives the three screw nuts and the three connecting parts to rise or fall synchronously, so as to achieve the purpose of driving the lower furnace cover to rise or fall, and solves the problem of insufficient bearing capacity of the existing opening and closing structure. At the same time, the slider of the connecting part cooperates with the corresponding longitudinal guide rail to avoid eccentricity caused by shaking of the lower furnace cover during lifting and lowering, and has good movement stability.

[0011] 2. The first longitudinal screw, the second longitudinal screw and the third longitudinal screw are evenly distributed around the center line of the lower furnace cover to ensure that the lower furnace cover is evenly stressed, further ensuring smooth movement, avoiding eccentricity, and greatly reducing the difficulty of centering during assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model;

[0013] Figure 2 yes Figure 1 Left view of

[0014] Figure 3 yes Figure 1 A top view of

[0015] Figure 4 It is a stereogram of the utility model.

[0016] In the figure: 1. servo motor, 2. first right angle converter, 3. second transmission shaft, 4. second right angle converter, 5. third transmission shaft, 6. third right angle converter, 7. vertical bracket, 8. longitudinal guide rail, 9. slider, 10. connecting piece, 11. lower furnace cover, 12. first longitudinal lead screw, 13. second longitudinal lead screw, 14. third longitudinal lead screw, 15. nut, 16. first transmission shaft, 17. first transmission box, 18. second transmission box, 19. fourth transmission shaft. DETAILED DESCRIPTION

[0017] The utility model is described in detail according to the accompanying drawings of the specification.

[0018] like Figure 1 to Figure 4 As shown, the three-link mechanism for smoothly lifting and lowering the lower furnace cover includes a stand on which the vacuum furnace is located, three connecting members 10 fixed to the bottom surface of the lower furnace cover 11, and three vertical brackets 7 evenly arranged on the stand around the center line of the lower furnace cover 11. The three connecting members 10 are evenly arranged around the center line of the lower furnace cover 11.

[0019] Among them, the tops of the three vertical brackets 7 are respectively fixed with the first right angle converter 2, the second right angle converter 4, and the third right angle converter 6, and the horizontal input ends of the first right angle converter 2, the second right angle converter 4, and the third right angle converter 6 are connected to the servo motor 1 by means of a synchronous transmission mechanism. In this embodiment, the synchronous transmission mechanism includes a first transmission box 17 connected to the output end of the servo motor 1, a first transmission shaft 16 connected to the first horizontal output end of the first transmission box 17, a second transmission shaft 3 connected to the second horizontal output end of the first transmission box 17, a third transmission shaft 5 coaxial with the second transmission shaft 3, a second transmission box 18 connected to the end of the third transmission shaft 5, and a fourth transmission shaft 19 connected to the horizontal output end of the second transmission box 18, the first transmission shaft 16 is connected to the horizontal input end of the first right angle converter 2, the second transmission shaft 3 is connected to the horizontal input end of the second right angle converter 4, and the fourth transmission shaft 19 is connected to the horizontal input end of the third right angle converter 6.

[0020] The vertical output end of the first right angle converter 2 is connected to the upper end of the first longitudinal lead screw 12, the vertical output end of the second right angle converter 4 is connected to the upper end of the second longitudinal lead screw 13, and the vertical output end of the third right angle converter 6 is connected to the upper end of the third longitudinal lead screw 14. The vertical bracket 7 is provided with bearing assemblies corresponding to the first longitudinal lead screw 12, the second longitudinal lead screw 13 and the third longitudinal lead screw 14. The first longitudinal lead screw 12, the second longitudinal lead screw 13 and the third longitudinal lead screw 14 are evenly arranged around the center line of the lower furnace cover 11. The first longitudinal lead screw 12, the second longitudinal lead screw 13 and the third longitudinal lead screw 14 are respectively provided with screw nuts 15, and the three screw nuts 15 correspond to the three connecting members 10 one by one and are connected and fixed. The vertical bracket 7 is provided with a longitudinal guide rail 8 parallel to the first longitudinal lead screw 12, the second longitudinal lead screw 13 and the third longitudinal lead screw 14, and the connecting member 10 is provided with a slider 9 that cooperates with the longitudinal guide rail 8.

[0021] Working principle:

[0022] Start the servo motor 1, and drive the first right-angle converter 2, the second right-angle converter 4 and the third right-angle converter 6 to rotate synchronously through the synchronous transmission mechanism, thereby driving the first longitudinal lead screw 12, the second longitudinal lead screw 13 and the third longitudinal lead screw 14 to rotate synchronously, then the nut 15 on the first longitudinal lead screw 12, the second longitudinal lead screw 13 and the third longitudinal lead screw 14, and the connecting piece 10 connected to the nut 15 drive the lower furnace cover 11 to rise or fall, so as to close or open the lower furnace cover 11.

[0023] The above is a detailed description of the embodiments of the utility model, but the above contents are only preferred embodiments of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of the invention of the utility model should still fall within the scope of this patent.

Claims

1. A three-linkage mechanism for smoothly lifting and lowering the lower furnace cover, comprising a stand on which the vacuum furnace is located, three connecting pieces fixed to the bottom surface of the lower furnace cover, and three vertical brackets evenly arranged on the stand around the center line of the lower furnace cover, wherein the three connecting pieces are evenly arranged around the center line of the lower furnace cover, and characterized in that: The tops of the three vertical brackets are respectively fixed with the first right-angle converter, the second right-angle converter, and the third right-angle converter. The horizontal input ends of the first right-angle converter, the second right-angle converter, and the third right-angle converter are connected to the servo motor by means of a synchronous transmission mechanism. The vertical output end of the first right-angle converter is connected to the upper end of the first longitudinal lead screw, the vertical output end of the second right-angle converter is connected to the upper end of the second longitudinal lead screw, and the vertical output end of the third right-angle converter is connected to the upper end of the third longitudinal lead screw. Nuts are respectively provided on the first longitudinal lead screw, the second longitudinal lead screw, and the third longitudinal lead screw. The three nuts correspond to the three connecting parts one by one and are connected and fixed. The vertical bracket is provided with a longitudinal guide rail parallel to the first longitudinal lead screw, the second longitudinal lead screw, and the third longitudinal lead screw, and the connecting part is provided with a slider that cooperates with the longitudinal guide rail.

2. The three-linkage mechanism for smoothly lifting and lowering the lower furnace cover according to claim 1 is characterized in that: The synchronous transmission mechanism includes a first transmission box connected to the output end of the servo motor, a first transmission shaft connected to the first horizontal output end of the first transmission box, a second transmission shaft connected to the second horizontal output end of the first transmission box, a third transmission shaft coaxial with the second transmission shaft, a second transmission box connected to the end of the third transmission shaft, and a fourth transmission shaft connected to the horizontal output end of the second transmission box, the first transmission shaft is connected to the horizontal input end of the first right-angle converter, the second transmission shaft is connected to the horizontal input end of the second right-angle converter, and the fourth transmission shaft is connected to the horizontal input end of the third right-angle converter.

3. The three-linkage mechanism for smoothly lifting and lowering the lower furnace cover according to claim 1 is characterized in that: The vertical support is provided with bearing assemblies corresponding to the first longitudinal lead screw, the second longitudinal lead screw and the third longitudinal lead screw.

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