Furnace cover rotation limiting mechanism

Abstract

The invention relates to the technical field of silicon carbide furnaces. A furnace cover rotation limiting mechanism comprises a limiting mounting seat fixedly arranged relative to a furnace body, the limiting mounting seat comprises a fixing seat and a limiting pin, the fixing seat is connected with the limiting pin through a spring, and the top of the limiting pin is of a hemispherical structure; the limiting bracket is fixedly arranged relative to the furnace cover and moves synchronously with the furnace cover; the limiting support comprises a movable seat and a roller, the movable seat is rotatably connected with the roller through a rotating shaft, the movable seat comprises a mounting plate and a limiting plate which are arranged left and right, the roller is rotatably mounted between the mounting plate and the limiting plate, the lowest position of the roller is higher than the lowest position of the limiting plate, and the lowest position of the roller is lower than the lowest position of the mounting plate. The device is simple in structure, and locking of the unscrewed furnace cover is facilitated.

Description

Technical Field

[0001] The invention relates to the field of silicon carbide furnaces, and in particular to a limiting mechanism. Background Art

[0002] The growth of silicon carbide crystals requires the use of a silicon carbide crystal growth furnace. The chamber of a silicon carbide crystal growth furnace usually includes a furnace barrel, a furnace cover, a heat field, etc. The furnace cover is generally designed to be lifted and rotated. When loading the furnace, it is usually necessary to raise the furnace cover, and then rotate the furnace cover manually or electrically to leave operating space for installing the heat field.

[0003] Silicon carbide crystal growth furnaces usually use manually rotating furnace covers. After the furnace cover is unscrewed, it needs to be limited and fixed. The traditional method is to insert a limit pin to fix it. However, sometimes due to limited operating space, this method is not convenient in actual use. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention provides a furnace cover rotation limiting mechanism, which has solved at least one of the above technical problems.

[0005] The technical solution of the present invention is: a furnace cover rotation limiting mechanism, characterized in that it comprises a limiting mounting seat fixedly arranged relative to the furnace body, the limiting mounting seat comprises a fixing seat and a limiting pin, the fixing seat is connected to the limiting pin through a spring, and the top of the limiting pin is a hemispherical structure;

[0006] It also includes a limiting bracket which is fixedly arranged relative to the furnace cover and moves synchronously;

[0007] The limit bracket includes a movable seat and a roller, the movable seat is rotatably connected to the roller via a rotating shaft, the movable seat includes a mounting plate and a limit plate arranged on the left and right, the roller is rotatably mounted between the mounting plate and the limit plate, the lowest point of the roller is higher than the lowest point of the limit plate, and the lowest point of the roller is lower than the lowest point of the mounting plate;

[0008] When the furnace cover rotates, the limit bracket moves synchronously, the roller touches the limit pin, elastically presses the limit pin downward, the limit bracket continues to move, the roller rotates around the rotating shaft, the roller passes over the limit pin, the limit pin is elastically pushed out and is located in the area between the roller and the limit plate;

[0009] When the furnace cover rotates in the opposite direction, the roller touches the limit pin, elastically pressing the limit pin downward, and the limit bracket continues to move. The roller rotates around the rotating shaft, and the roller passes over the limit pin, and the limit pin is elastically pushed out. The limit pin is located on the periphery of the area between the roller and the limit plate.

[0010] The device has a simple structure and is convenient for locking the furnace cover after it has been unscrewed.

[0011] Further preferably, when the furnace cover is rotated to open, the limit pin is located in the area between the roller and the limit plate;

[0012] When the furnace cover is closed, the furnace cover and the furnace body are arranged up and down, and the limiting pin is located at the periphery of the area between the roller and the limiting plate.

[0013] Further preferably, the front and rear sides of the mounting plate are connected to the limiting plate via a connecting plate;

[0014] The rotating shaft is mounted on the connecting plate.

[0015] Easy to assemble.

[0016] Further preferably, the mounting plate is provided with four waist-shaped holes arranged in a matrix;

[0017] The length direction of the waist-shaped hole is vertically arranged.

[0018] Further preferably, the limit pin comprises a guide shaft, and the outer wall of the guide shaft is provided with a limit protrusion;

[0019] The fixing seat comprises an upper plate body and a lower plate body arranged up and down, and the upper plate body and the lower plate body are both provided with a guide hole for slidingly connecting the guide shaft;

[0020] The spring is sandwiched between the lower plate and the limiting protrusion, and the spring is sleeved on the periphery of the guide shaft.

[0021] It is convenient for the elastic longitudinal expansion and contraction of the limit pin.

[0022] Further preferably, the fixing seat further comprises a cylinder with upper and lower openings, the upper part of the cylinder is connected to the upper plate body, and the lower part of the cylinder is connected to the lower plate body.

[0023] Further preferably, the inner side of the cylinder is longitudinally slidably connected to the outer side of the limiting protrusion.

[0024] Further preferably, when the furnace cover rotates and the limiting protrusion abuts against the lower side of the upper plate, the top of the limiting pin is higher than the lowest point of the roller and not higher than the height of the central axis of the roller;

[0025] The bottom of the limiting plate is located at a height higher than the upper side of the upper plate body and lower than the hemispherical structure.

[0026] Further preferably, the roller is a cylindrical roller, and the central axis direction of the roller is perpendicular to the thickness direction of the mounting plate and the limiting plate.

[0027] Further preferably, the central axis direction of the roller is perpendicular to the rotation center line direction of the furnace cover.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] The rotation limit mechanism is easy to operate. You only need to gently push the furnace cover to rotate it into place, and it will automatically lock to prevent excessive rotation or backward rotation. It solves the problem of limiting the rotation of the furnace cover.

[0030] The rotation limit mechanism is cleverly designed, simple and practical, and does not require complicated adjustment or precise centering. It solves the problem that in the traditional furnace cover rotation limit mechanism, the operator must accurately insert the limit pin into the pin hole, which places higher requirements on the operator, and the operator must be close to the limit pin to operate.

[0031] The rotation limit mechanism has lower requirements on the position of the operator, as long as the operator can rotate the furnace cover. It solves the problem that the limit structure in the traditional furnace cover rotation limit mechanism must be installed in a position that is accessible and easy to operate, while the installation position of the rotation structure is relatively more flexible. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A cross-sectional view of a specific embodiment 1 of the present invention;

[0033] Figure 2 A cross-sectional view of a specific embodiment 1 of the present invention;

[0034] Figure 3 It is a cross-sectional view of specific embodiment 1 of the present invention.

[0035] In the figure, 1 is a fixed seat, 2 is a movable seat, 3 is a roller, 4 is a limit pin, 5 is a spring, and 6 is a lower plate. DETAILED DESCRIPTION

[0036] See also Figures 1 to 3, Specific embodiment 1, a furnace cover rotation limit mechanism, including a limit mounting seat fixedly arranged relatively to the furnace body, the limit mounting seat including a fixed seat 1 and a limit pin 4, the fixed seat 1 is connected to the limit pin 4 through a spring 5, and the top of the limit pin 4 is a hemispherical structure; it also includes a limit bracket fixedly arranged relatively to the furnace cover and moving synchronously; the limit bracket includes a movable seat 2 and a roller 3, the movable seat 2 is rotatably connected to the roller 3 through a rotating shaft, the movable seat 2 includes a mounting plate and a limit plate arranged on the left and right, the roller 3 is rotatably installed between the mounting plate and the limit plate, and the lowest point of the roller 3 is higher than the lowest point of the limit plate. , the lowest point of the roller 3 is lower than the lowest point of the mounting plate; when the furnace cover rotates, the limit bracket moves synchronously, the roller 3 touches the limit pin 4, the limit pin 4 is elastically pressed down, the limit bracket continues to move, the roller 3 rotates around the shaft, the roller 3 passes over the limit pin 4, the limit pin 4 is elastically ejected, and is located in the area between the roller 3 and the limit plate; when the furnace cover rotates in the opposite direction, the roller 3 touches the limit pin 4, the limit pin 4 is elastically pressed down, the limit bracket continues to move, the roller 3 rotates around the shaft, the roller 3 passes over the limit pin 4, the limit pin 4 is elastically ejected, and the limit pin 4 is located on the periphery of the area between the roller 3 and the limit plate. The device has a simple structure and is convenient for locking the furnace cover after it is unscrewed.

[0037] The furnace body is connected to the furnace cover through a lifting mechanism, and the lifting mechanism includes a lifting column, on which the furnace cover is rotatably connected. A limit bracket is installed on the radial outer side of the furnace cover. A limit mounting seat is installed on the outer side of the furnace body. The limit mounting seat is located below the height position of the furnace cover when it is in a rotating action. When the furnace cover is in a rotating action, the furnace cover and the furnace body are arranged up and down, and there is a height difference gap between the furnace cover and the furnace body. After the furnace cover is lifted by the lifting mechanism, the furnace cover rotates and then opens. When closing the cover, the furnace cover rotates in the opposite direction, and after the furnace cover is lowered by the lifting mechanism, the furnace cover is closed.

[0038] When the furnace cover is rotated to open, the limit pin 4 is located in the area between the roller 3 and the limit plate; when the furnace cover is closed, the furnace cover and the furnace body are arranged up and down, and the limit pin 4 is located on the periphery of the area between the roller 3 and the limit plate.

[0039] The front and rear sides of the mounting plate are connected to the limit plate through a connecting plate; a rotating shaft is installed on the connecting plate to facilitate assembly.

[0040] The mounting plate is provided with four waist-shaped holes arranged in a matrix; the length direction of the waist-shaped holes is vertically arranged.

[0041] The limit pin 4 includes a guide shaft, and a limit protrusion is provided on the outer wall of the guide shaft; the fixing seat 1 includes an upper plate body and a lower plate body 6 arranged up and down, and the upper plate body and the lower plate body 6 are both provided with guide holes for sliding connection with the guide shaft;

[0042] A spring 5 is sandwiched between the lower plate 6 and the limiting protrusion, and the spring 5 is sleeved on the periphery of the guide shaft to facilitate the elastic longitudinal expansion and contraction of the limiting pin 4.

[0043] The fixing seat 1 also includes a cylinder with upper and lower openings, the upper part of the cylinder is connected to the upper plate, and the lower part of the cylinder is connected to the lower plate 6. The inner side of the cylinder is longitudinally slidably connected to the outer side of the limiting protrusion. The cylinder is fixedly connected to the upper plate to form a mounting cylinder. The lower plate 6 is detachably connected to the mounting cylinder.

[0044] When the furnace cover rotates and the limiting protrusion abuts against the lower side of the upper plate body, the top of the limiting pin 4 is higher than the lowest point of the roller 3 and not higher than the height of the central axis of the roller 3; the bottom of the limiting plate is at a height higher than the upper side of the upper plate body and lower than the hemispherical structure.

[0045] The roller 3 is a cylindrical roller, and the central axis direction of the roller 3 is perpendicular to the thickness direction of the mounting plate and the limiting plate. The central axis direction of the roller 3 is perpendicular to the rotation centerline direction of the furnace cover.

[0046] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A furnace cover rotation limiting mechanism, characterized in that: It includes a limit mounting seat fixedly arranged relative to the furnace body, the limit mounting seat includes a fixed seat and a limit pin, the fixed seat is connected to the limit pin through a spring, and the top of the limit pin is a hemispherical structure; It also includes a limiting bracket which is fixedly arranged relative to the furnace cover and moves synchronously; The limit bracket includes a movable seat and a roller, the movable seat is rotatably connected to the roller via a rotating shaft, the movable seat includes a mounting plate and a limit plate arranged on the left and right, the roller is rotatably mounted between the mounting plate and the limit plate, the lowest point of the roller is higher than the lowest point of the limit plate, and the lowest point of the roller is lower than the lowest point of the mounting plate; When the furnace cover rotates, the limit bracket moves synchronously, the roller touches the limit pin, elastically presses the limit pin downward, the limit bracket continues to move, the roller rotates around the rotating shaft, the roller passes over the limit pin, the limit pin is elastically pushed out and is located in the area between the roller and the limit plate; When the furnace cover rotates in the opposite direction, the roller touches the limit pin, elastically pressing the limit pin downward, and the limit bracket continues to move. The roller rotates around the rotating shaft, and the roller passes over the limit pin, and the limit pin is elastically pushed out. The limit pin is located on the periphery of the area between the roller and the limit plate.

2. The furnace cover rotation limiting mechanism according to claim 1, characterized in that: When the furnace cover is rotated to open, the limit pin is located in the area between the roller and the limit plate; When the furnace cover is closed, the furnace cover and the furnace body are arranged up and down, and the limiting pin is located at the periphery of the area between the roller and the limiting plate.

3. The furnace cover rotation limiting mechanism according to claim 1, characterized in that: The front and rear sides of the mounting plate are connected to the limiting plate through a connecting plate; The rotating shaft is mounted on the connecting plate.

4. The furnace cover rotation limiting mechanism according to claim 1, characterized in that: The mounting plate is provided with four waist-shaped holes arranged in a matrix; The length direction of the waist-shaped hole is vertically arranged.

5. The furnace cover rotation limiting mechanism according to claim 1, characterized in that: The limiting pin comprises a guide shaft, and a limiting protrusion is arranged on the outer wall of the guide shaft; The fixing seat comprises an upper plate body and a lower plate body arranged up and down, and the upper plate body and the lower plate body are both provided with a guide hole for slidingly connecting the guide shaft; The spring is sandwiched between the lower plate and the limiting protrusion, and the spring is sleeved on the periphery of the guide shaft.

6. The furnace cover rotation limiting mechanism according to claim 5, characterized in that: The fixing seat further comprises a cylinder with upper and lower openings, wherein the upper part of the cylinder is connected to the upper plate, and the lower part of the cylinder is connected to the lower plate.

7. The furnace cover rotation limiting mechanism according to claim 6, characterized in that: The inner side of the cylinder is longitudinally slidably connected to the outer side of the limiting protrusion.

8. The furnace cover rotation limiting mechanism according to claim 5, characterized in that: When the furnace cover rotates and the limiting protrusion abuts against the lower side of the upper plate, the top of the limiting pin is higher than the lowest point of the roller and not higher than the height of the central axis of the roller; The bottom of the limiting plate is located at a height higher than the upper side of the upper plate body and lower than the hemispherical structure.

9. The furnace cover rotation limiting mechanism according to claim 1, characterized in that: The roller is a cylindrical roller, and the central axis direction of the roller is perpendicular to the thickness direction of the mounting plate and the limiting plate.

10. The furnace cover rotation limiting mechanism according to claim 9, characterized in that: The central axis direction of the roller is perpendicular to the rotation center line direction of the furnace cover.

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