An automatic single crystal furnace seed crystal cutting device

Abstract

The present invention discloses an automatic seed crystal shearing device for a single crystal furnace, which includes a seed crystal shearing device (2) arranged at the lower part of a secondary chamber (1). The seed crystal shearing device (2) includes a rotating motor (21), a rotating shaft (22) and a rotating bracket (23) that are connected in sequence. A telescopic cylinder (24) is fixed on the rotating bracket (23). The telescopic cylinder (24) is then connected to a telescopic rack (25), a transmission gear (26) and an opening and closing gear (28) in sequence. The opening and closing gear (28) is coaxially connected to the transmission gear (26). A slide bar (29) is arranged below the opening and closing gear (28). A rack knife rest (210) is slidably connected to the slide bar (29). One end of each rack knife rest (210) meshes with the corresponding side of the opening and closing gear (28), and the other end is connected to a cutting knife (211). The advantages of the present invention are that it can complete the automatic shearing of the seed crystal, save working hours, effectively avoid the risk of silicon slag splashing into people's faces during seed crystal shearing, and improve safety.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic manufacturing, and in particular to an automatic seed crystal shearing device for a single crystal furnace. Background Art

[0002] Generally, the furnace body shell of a single crystal furnace consists of a main chamber and an auxiliary chamber. The structure of the auxiliary chamber is a circular cavity. A rotation and lifting mechanism is installed at the top of the auxiliary chamber to complete the pulling operation of a single crystal rod. When pulling a single crystal rod, according to the crystal pulling process, a thin crystal with a diameter of 5 ± 0.5 mm needs to be pulled out first, and then processes such as shoulder releasing, shoulder turning, and equal diameter are carried out to reach the size of the pulled crystal rod. When the pulled single crystal rod is taken out of the furnace, it needs to be lifted to the auxiliary chamber first for isolation storage, and then the auxiliary chamber is rotated open to take out the crystal rod. When taking out the single crystal rod, personnel need to manually cut the seed crystal with pliers.

[0003] However, since the position for cutting the seed crystal is relatively high from the ground, it is necessary to stand on a stool to operate the seed crystal cutting, which wastes working hours. At the same time, since the personnel are relatively close to the seed crystal position, there is a risk that the silicon slag generated during seed crystal cutting may splash into the face, posing a risk of safety accidents. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems of low efficiency and great potential safety hazards in the existing manual operation of seed crystal cutting, and provide an automatic seed crystal shearing device for a single crystal furnace, which can automatically cut the seed crystal, save working hours, effectively avoid the risk of silicon slag splashing into people's faces during seed crystal cutting, and improve safety.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] An automatic seed crystal shearing device for a single crystal furnace includes a seed crystal shearing device provided at the lower part of the auxiliary chamber. The seed crystal shearing device is connected to one side of the outer wall of the auxiliary chamber. It includes a rotation motor, the output end of the rotation motor is connected to a rotation shaft, a rotation bracket is connected to the rotation shaft, a telescopic cylinder is fixed on the rotation bracket, and their axes are perpendicular to each other;

[0007] The telescopic end of the telescopic cylinder is connected to a telescopic rack. Both sides of the telescopic rack are respectively meshed with a transmission gear. Each transmission gear is respectively connected to a middle shaft. The axis of the middle shaft is perpendicular to the axis of the telescopic rack, so as to drive the rack to move through the cylinder and drive the transmission gear to rotate;

[0008] Each middle shaft is also connected with an opening and closing gear. The opening and closing gear is coaxially connected with the transmission gear. A sliding rod is provided below the opening and closing gear. A pair of rack knife holders are connected to the sliding rod, and they form a sliding guiding fit. One end of each rack knife holder is meshed with the corresponding opening and closing gear, and the other end is fixed with a cutting knife, so as to drive the opening and closing gear to rotate together through the transmission gear, and thus drive the rack knife holder to approach or move away.

[0009] Further, the seed crystal shearing device is connected to the secondary chamber through a U-shaped seat. The opening of the U-shaped seat faces the outer wall of the secondary chamber, and a pair of parallel connecting ears are fixed on the outside of the U-shaped seat. The rotating shaft is horizontally hinged on the two connecting ears.

[0010] Further, the rotating motor is also fixed on the outside of the U-shaped seat, and its output end faces the rotating shaft.

[0011] Further, the rotating bracket includes a pair of parallel rotating rods and a mounting cover fixed between the rotating rods. One end of the rotating rod is fixedly connected to the rotating shaft, and the other end is connected to the upper part of the mounting cover. The axis of the rotating rod is perpendicular to the axis of the mounting cover.

[0012] Further, the telescopic cylinder is connected to the outside of the mounting cover, and its telescopic end passes through the mounting cover and is connected to the telescopic rack inward.

[0013] Further, the central shaft and the sliding rod are respectively vertically connected to the inner shell of the mounting cover, and the axis of the central shaft is perpendicular to the axis of the sliding rod.

[0014] Further, an opening is provided at the lower part of the mounting cover. The rack cutter holder is of an L-shaped structure. One end is provided with a rack, and the rack meshes with the opening and closing gear. The other end extends out of the opening of the mounting cover and is connected to the cutting knife outward.

[0015] Further, the rotation angle of the rotating motor is 0° - 90°, and when the rotation angle is 90°, the seed crystal is exactly between the cutting edges of the two cutting knives.

[0016] In the technical solution of the present invention, by adding an automatic seed crystal shearing device at the lower part of the secondary chamber of the original single crystal furnace, when taking out the single crystal rod, the operator can control the cutting knife to rotate to the position of the seed crystal and complete the automatic shearing of the seed crystal on the computer operation interface, saving working hours, improving work efficiency, avoiding the risk of silicon slag splashing into the face when manually shearing the seed crystal, and improving the operation safety. Description of the Drawings

[0017] Figure 1 is the assembly drawing of the automatic seed crystal shearing device of the single crystal furnace of the present invention;

[0018] Figure 2 is the initial state diagram of the automatic seed crystal shearing device of the single crystal furnace of the present invention at 0°;

[0019] Figure 3 is the shearing state diagram of the automatic seed crystal shearing device of the single crystal furnace of the present invention at 90°;

[0020] Figure 4 is the external structure diagram of the seed crystal shearing device of the present invention;

[0021] Figure 5 is the internal structure of the seed crystal shearing device of the present invention Figure 1 ;

[0022] Figure 6 is the internal structure of the seed crystal shearing device of the present invention Figure 2 ;

[0023] Figure 7 is the front view of the internal structure of the seed crystal shearing device of the present invention. Detailed implementation mode

[0024] Embodiment 1

[0025] To make the present invention more clear and understandable, the following further describes an automatic seed crystal shearing device for a single crystal furnace of the present invention with reference to the accompanying drawings. The specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0026] See Figures 1 - 3 , an automatic seed crystal shearing device for a single crystal furnace, including a seed crystal shearing device 2 provided at the lower part of the secondary chamber 1, characterized in that:

[0027] See Figure 2 and Figure 3 , the seed crystal shearing device 2 is connected to the secondary chamber 1 through a U-shaped seat 5. The opening of the U-shaped seat 5 faces the outer wall of the secondary chamber 1. A pair of parallel connecting ears 6 are fixed on the outside of the U-shaped seat 5. A horizontal rotating shaft 22 is hinged on the connecting ears 6. A rotating motor 21 is also fixed on the outside of the U-shaped seat 5. The output end of the rotating motor 21 is connected to the rotating shaft 22;

[0028] See Figures 4 - 6 , a rotating bracket 23 is connected to the rotating shaft 22. The rotating bracket 23 includes a pair of parallel rotating rods 231 and a mounting cover 232 fixed between the rotating rods 231. One end of the rotating rod 231 is fixedly connected to the rotating shaft 22, and the other end is connected to the upper part of the mounting cover 232. The axis of the rotating rod 231 is perpendicular to the axis of the mounting cover 232;

[0029] A telescopic cylinder 24 is fixed on the outside of the mounting cover 232, and its telescopic end vertically passes through the mounting cover 232 and is connected to a telescopic rack 25 inward;

[0030] Both sides of the telescopic rack 25 are meshed with a transmission gear 26 respectively. Each transmission gear 26 is respectively connected to a central shaft 27. The axis of the central shaft 27 is perpendicular to the axis of the telescopic rack 26, so as to drive the rack to move through the cylinder and drive the transmission gear to rotate;

[0031] See Figure 7, a switching gear 28 is also connected to each central shaft 27. The switching gear 28 is coaxially connected to the transmission gear 26. A slide bar 29 is provided below the switching gear 28. The central shaft 27 and the slide bar 29 are respectively vertically connected to the inner shell of the mounting cover 232, and the axis of the central shaft 27 is perpendicular to the axis of the slide bar 29;

[0032] See Figures 5 - 7 , a pair of rack tool holders 210 are connected to the slide bar 29, and they form a sliding guiding fit. An opening 232a is provided at the lower part of the mounting cover 232. The rack tool holder 210 is of an L-shaped structure. One end thereof is provided with a rack 210a, and the rack 210a meshes with the switching gear 28. The other end extends out of the opening 232a of the mounting cover 232 and is connected to a cutting tool 211 outside, so as to drive the switching gear to rotate together through the transmission gear, and thus drive the rack tool holder to approach or move away.

[0033] See Figure 2 and Figure 3 , between the ingot 4 and the auxiliary chamber 1 is the seed crystal 3. The rotation angle of the rotation motor 21 is 0° to 90°, and when the rotation angle is 90°, the seed crystal 3 is exactly between the cutting edges of the two cutting tools 211.

[0034] When operating the single crystal furnace automatic seed crystal shearing device of the present invention, first start the rotation motor 21, rotate the device 90° to the closed position, start the telescopic cylinder 24, push the telescopic rack 25, so that it drives the transmission gear 26 to rotate, and the transmission gear 26 drives the coaxially connected switching gear 28 to rotate, thereby driving the rack tool holders 210 on both sides to close along the slide bar 29, and the cutting tool 211 closes accordingly to cut off the seed crystal 3. After the cutting is completed, the device can be reset.

[0035] The device of the present invention does not require the staff to approach the seed crystal to cut it. Only by operating on the computer operation interface can the cutting tool be controlled to rotate to the position of the seed crystal and complete the automatic cutting of the seed crystal, saving working hours, improving work efficiency, avoiding the risk of silicon slag splashing into the face when manually cutting the seed crystal, and improving the safety of operation.

[0036] In addition to the above embodiments, the present invention can also have other embodiments. All technical solutions formed by equivalent replacement or equivalent transformation fall within the protection scope required by the present invention.

Claims

1. An automatic seed crystal shearing device for a single crystal furnace, comprising a seed crystal shearing device (2) provided at the lower part of a secondary chamber (1), characterized in that: The seed crystal shearing device (2) is connected to one side of the outer wall of the secondary chamber (1), and it includes a rotating motor (21). The output end of the rotating motor (21) is connected to a rotating shaft (22). A rotating bracket (23) is connected to the rotating shaft (22), and a telescopic cylinder (24) is fixed on the rotating bracket (23), and their axes are perpendicular to each other; The rotation angle of the rotating motor (21) is 0° - 90°, and when the rotation angle is 90°, the seed crystal (3) is exactly between the cutting edges of two cutting knives (211); The rotating bracket (23) includes a pair of parallel rotating rods (231) and a mounting cover (232) fixed between the rotating rods (231). One end of the rotating rod (231) is fixedly connected to the rotating shaft (22), and the other end is connected to the upper part of the mounting cover (232). The axis of the rotating rod (231) is perpendicular to the axis of the mounting cover (232); The telescopic end of the telescopic cylinder (24) is connected to a telescopic rack (25). The two sides of the telescopic rack (25) are respectively meshed with a transmission gear (26). Each transmission gear (26) is respectively connected to a middle shaft (27), and the axis of the middle shaft (27) is perpendicular to the axis of the telescopic rack (25); Each middle shaft (27) is also connected to an opening and closing gear (28). The opening and closing gear (28) is coaxially connected to the transmission gear (26). A sliding rod (29) is provided below the opening and closing gear (28). A pair of rack knife holders (210) are connected to the sliding rod (29), and they form a sliding guiding fit. One end of each rack knife holder (210) is meshed with the corresponding opening and closing gear (28), and the other end is fixed with a cutting knife (211); The seed crystal shearing device (2) is connected to the secondary chamber (1) through a U-shaped seat (5). The opening of the U-shaped seat (5) faces the outer wall of the secondary chamber (1), and a pair of parallel connecting ears (6) are fixed on the outside of the U-shaped seat (5). The rotating shaft (22) is horizontally hinged on the two connecting ears (6).

2. The automatic seed crystal shearing device for a single crystal furnace according to claim 1, characterized in that: The rotating motor (21) is also fixed on the outside of the U-shaped seat (5), and its output end faces the rotating shaft (22).

3. The automatic seed crystal shearing device for a single crystal furnace according to claim 1, characterized in that: The telescopic cylinder (24) is connected to the outside of the mounting cover (232), and its telescopic end passes through the mounting cover (232) and is connected to the telescopic rack (25) inward.

4. The automatic seed crystal shearing device for a single crystal furnace according to claim 1, characterized in that: The middle shaft (27) and the sliding rod (29) are respectively vertically connected to the inner shell of the mounting cover (232), and the axis of the middle shaft (27) is perpendicular to the axis of the sliding rod (29).

5. The automatic seed crystal shearing device for a single crystal furnace according to claim 1, characterized in that: The lower part of the installation cover (232) is provided with an opening (232a). The rack tool rest (210) has an L-shaped structure. One end of the rack tool rest is provided with a rack (210a). The rack (210a) meshes with the opening and closing gear (28). The other end extends out of the opening (232a) of the installation cover (232) and is connected to the cutting tool (211) outward.

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