High-temperature-resistant seed crystal lifting rod

Abstract

The utility model relates to the technical field of crystal bar production, in particular to a high-temperature-resistant seed crystal lifting rod which comprises a rotating core shaft, a fixing mechanism arranged at the upper end of the rotating core shaft and a connecting mechanism arranged at the lower end of the rotating core shaft, the fixing mechanism comprises a mandrel fixing seat, a bearing and a locking nut, the locking nut is in threaded connection with the rotating mandrel, the connecting mechanism comprises an extension rod and a buckling device arranged at the lower end of the extension rod, the upper end of the extension rod is connected with the rotating mandrel, and the lower end of the extension rod is connected with a seed crystal through the buckling device. According to the utility model, the extension rod with a proper length can be selected for extension drawing according to actual drawing requirements, so that the drawing requirements of seed crystals with different lengths are met; the seed crystal can be rapidly clamped and disassembled through the buckling device, the structure is compact, and installation is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of crystal rod production, in particular to a high-temperature resistant seed crystal pulling rod. Background Art

[0002] The growth process of the Czochralski method is to first place the raw materials of the crystal to be grown in a high-temperature resistant crucible and heat and melt them, and adjust the temperature field in the furnace so that the upper part of the melt is in a supercooled state; then place a seed crystal on the pulling rod and let the seed crystal contact the surface of the melt. After the surface of the seed crystal is slightly melted, pull and rotate the pulling rod to keep the melt in a supercooled state and crystallize on the seed crystal. During the continuous pulling and rotation process, cylindrical crystals grow.

[0003] The lifting rods in existing production equipment are usually of a unified standard and cannot be adjusted according to actual usage needs, especially the requirement of producing different specifications of crystal rods in the same batch; at the same time, the method of fixing the crystal rods is complicated, and disassembly is time-consuming and labor-intensive. Utility Model Content

[0004] The utility model provides a high-temperature resistant seed crystal lifting rod to solve the problems of the prior art.

[0005] The purpose of the utility model can be achieved through the following technical solutions: A high-temperature resistant seed crystal lifting rod, comprising: a rotating core shaft, a fixing mechanism arranged at the upper end of the rotating core shaft and a connecting mechanism arranged at the lower end of the rotating core shaft, the top end of the rotating core shaft is connected to a driving gear, the fixing mechanism comprises a core shaft fixing seat sleeved on the outside of the rotating core shaft, a bearing arranged between the core shaft fixing seat and the rotating core shaft, and a locking nut arranged at the upper end of the core shaft fixing seat, the locking nut is threadedly connected to the rotating core shaft, the connecting mechanism comprises an extension rod and a snap-fit ​​device arranged at the lower end of the extension rod, the upper end of the extension rod is connected to the rotating core shaft and its lower end is connected to the seed crystal through the snap-fit ​​device.

[0006] A further improvement is that the lower end of the extension rod is provided with an assembly groove, the upper end of the seed crystal is provided with a connecting portion, the snap-fit ​​device includes a pin sleeve and a locking sleeve that can be threadedly connected, the pin sleeve is slidably set at the lower end of the extension rod, and the locking sleeve is slidably set at the upper end of the seed crystal.

[0007] As a further improvement, a first pin hole is provided through the side end of the extension rod, the first pin hole and the assembly groove are provided through, a second pin hole is provided through the side end of the seed crystal, and the snap-fit ​​device also includes a pin shaft, which can be inserted into the first pin hole and the second pin hole.

[0008] As a further improvement, a two-half ferrule is provided at the lower end of the extension rod, and the snap-fit ​​device is slidably arranged on the seed crystal and is threadedly connected to the two-half ferrule.

[0009] As a further improvement, the bearings are provided in two groups, and a bushing is provided between the two groups of bearings.

[0010] As a further improvement, the bushings are provided in two groups.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. The rotating mandrel of the utility model is made of high-temperature resistant SUS304 material, and the extension rod is made of high-temperature resistant molybdenum material. In actual use, the extension rod of appropriate length can be selected according to the actual drawing requirements for extension drawing to meet the drawing requirements of seed crystals of different lengths. At the same time, each individual high-temperature resistant seed crystal pulling rod is layered and evenly distributed on the seeding device in a circular shape, and can independently and synchronously rotate to pull the seed crystal, thereby improving the applicability of the equipment and greatly extending the service life of the equipment;

[0013] 2. The utility model can realize the rapid clamping and disassembly of the seed crystal through the buckling device, and has a compact structure and is easy to install. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic structural diagram of Example 1 of the present utility model;

[0015] Figure 2 This is a schematic diagram of the layout structure of Example 2 of the present utility model;

[0016] Figure 3 A top view of Example 1 of the present utility model;

[0017] Figure 4 For this utility model Figure 1 Enlarged view of the part A in the middle;

[0018] Figure 5 For this utility model Figure 1 Enlarged view of the middle part B;

[0019] Figure 6 For this utility model Figure 2 Enlarged view of part C in the middle.

[0020] In the figure, 1. rotating core shaft; 11. driving gear; 2. fixing mechanism; 21. core shaft fixing seat; 22. bearing; 23. locking lock nut; 3. connecting mechanism; 31. extension rod; 311. assembly groove; 312. first pin hole; 32. snap-fit ​​device; 321. pin sleeve; 322. locking sleeve; 323. pin shaft; 4. seed crystal; 41. connecting part; 42. second pin hole; 51. two-half ferrule; 6. bushing. DETAILED DESCRIPTION

[0021] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0022] In the description of this utility model, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0023] Below with reference to the embodiment and the attached Figures 1 to 6 , the technical solution of the utility model is further elaborated.

[0024] Example 1

[0025] A high-temperature resistant seed crystal lifting rod comprises: a rotating core shaft 1, a fixing mechanism 2 arranged at the upper end of the rotating core shaft 1 and a connecting mechanism 3 arranged at the lower end of the rotating core shaft 1, the top end of the rotating core shaft 1 is connected to a driving gear 11 for transmission, the fixing mechanism 2 comprises a core shaft fixing seat 21 sleeved on the outside of the rotating core shaft 1, a bearing 22 arranged between the core shaft fixing seat 21 and the rotating core shaft 1 and a locking nut 23 arranged at the upper end of the core shaft fixing seat 21, the locking nut 23 is threadedly connected to the rotating core shaft 1, the connecting mechanism 3 comprises an extension rod 31 and a snap-fit ​​device 32 arranged at the lower end of the extension rod 31, the upper end of the extension rod 31 is connected to the rotating core shaft 1 and its lower end is connected to the seed crystal 4 through the snap-fit ​​device 32.

[0026] like Figures 1 to 6 As shown, the rotating core shaft 1 of the present invention is made of high-temperature resistant SUS304 material, and the extension rod 31 is made of high-temperature resistant molybdenum material. In actual use, the extension rod 31 of appropriate length can be selected according to the actual drawing requirements for extension drawing to meet the drawing requirements of seed crystals of different lengths. At the same time, each individual high-temperature resistant seed crystal pulling rod is layered into a circle and evenly distributed on the seeding device, and can independently and synchronously rotate to pull the seed crystal 4, thereby improving the applicability of the equipment and greatly extending the service life of the equipment.

[0027] In this embodiment, an assembly groove 311 is provided at the lower end of the extension rod 31, a connecting portion 41 is provided at the upper end of the seed crystal 4, and the snap-fit ​​device 32 includes a pin sleeve 321 and a locking sleeve 322 that can be threadably connected. The pin sleeve 321 is slidably provided at the lower end of the extension rod 31, and the locking sleeve 322 is slidably provided at the upper end of the seed crystal 4.

[0028] Specifically, such as Figure 5 As shown, in the actual assembly process, the pulled seed crystal 4 is first inserted into the assembly groove 311 of the extension rod 31, and the connection between the extension rod 31 and the seed crystal 4 is achieved by rotating the pin sleeve 321 and the locking sleeve 322, so that the seed crystal can be quickly clamped and disassembled. The structure is compact and easy to install. A limiting portion is provided at the upper end of the seed crystal 4 to prevent the locking sleeve 322 from sliding out of the seed crystal 4. At the same time, the material of the pin sleeve 321 and the locking sleeve 322 is preferably graphite to improve the high temperature resistance of the equipment.

[0029] In this embodiment, a first pin hole 312 is provided through the side end of the extension rod 31, the first pin hole 312 and the assembly groove 311 are provided through, a second pin hole 42 is provided through the side end of the seed crystal 4, and the snap-fit ​​device 32 also includes a pin shaft 323, and the pin shaft 323 can be inserted into the first pin hole 312 and the second pin hole 42.

[0030] Specifically, such as Figure 5 As shown, during the assembly process, the pin shaft 323 can be used to lock the docking rod 31 and the seed crystal 4, further improving the locking stability. The structure is compact and easy to install. At the same time, the material of the pin shaft 323 is preferably molybdenum, which improves the high temperature resistance of the equipment.

[0031] Example 2

[0032] The difference between Example 2 and Example 1 is that a two-half ferrule 51 is provided at the lower end of the extension rod 31 , and the snap-fit ​​device 32 is slidably provided on the seed crystal 4 and is threadedly connected to the two-half ferrule 51 .

[0033] Specifically, such as Figure 6 As shown, in the actual assembly process, the seed crystal 4 is first inserted into the extension rod 31, and then the snap-fit ​​device 32 is rotated. During the rotation of the snap-fit ​​device 32, the inner sides of the two halves of the ferrule 51 are squeezed inward, thereby achieving the fixation of the connecting rod 31, realizing the rapid clamping and disassembly of the seed crystal, and the structure is compact and easy to install.

[0034] Example 3

[0035] The difference between Example 3 and Example 1 is that two groups of bearings 22 are provided, and a bushing 6 is provided between the two groups of bearings 22 .

[0036] In this embodiment, two groups of bushings 6 are provided.

[0037] Specifically, the bushing 6 supports the bearing 22 to prevent the bearing 22 from shifting during actual use.

[0038] The above describes in detail the preferred embodiments of the present invention. It should be understood that those skilled in the art can make numerous modifications and variations based on the concepts of the present invention without inventive effort. Therefore, any technical solutions that can be derived by those skilled in the art based on the concepts of the present invention through logical analysis, reasoning, or limited experimentation based on the existing technology should be within the scope of protection defined by the claims.

Claims

1. A high temperature resistant seed crystal pulling rod, characterized in that: include: A rotating core shaft (1), a fixing mechanism (2) arranged at the upper end of the rotating core shaft (1), and a connecting mechanism (3) arranged at the lower end of the rotating core shaft (1), wherein the top end of the rotating core shaft (1) is connected to a driving gear (11), the fixing mechanism (2) comprises a core shaft fixing seat (21) sleeved on the outer side of the rotating core shaft (1), a bearing (22) arranged between the core shaft fixing seat (21) and the rotating core shaft (1), and a locking nut (23) arranged at the upper end of the core shaft fixing seat (21), the locking nut (23) and the rotating core shaft (1) are threadedly connected, and the connecting mechanism (3) comprises an extension rod (31) and a buckling device (32) arranged at the lower end of the extension rod (31), the upper end of the extension rod (31) is connected to the rotating core shaft (1), and the lower end thereof is connected to a seed crystal (4) through the buckling device (32).

2. The high temperature resistant seed crystal pulling rod according to claim 1, characterized in that: The lower end of the extension rod (31) is provided with an assembly groove (311), the upper end of the seed crystal (4) is provided with a connecting portion (41), and the buckling device (32) includes a pin sleeve (321) and a locking sleeve (322) that can be threadedly connected, the pin sleeve (321) is slidably provided at the lower end of the extension rod (31), and the locking sleeve (322) is slidably provided at the upper end of the seed crystal (4).

3. The high temperature resistant seed crystal pulling rod according to claim 2, characterized in that: A first pin hole (312) is provided through the side end of the extension rod (31), and the first pin hole (312) and the assembly groove (311) are provided through each other. A second pin hole (42) is provided through the side end of the seed crystal (4), and the locking device (32) further includes a pin shaft (323), and the pin shaft (323) can be inserted into the first pin hole (312) and the second pin hole (42).

4. The high temperature resistant seed crystal pulling rod according to claim 1, characterized in that: A two-half ferrule (51) is provided at the lower end of the extension rod (31), and the fastening device (32) is slidably arranged on the seed crystal (4) and is threadedly connected to the two-half ferrule (51).

5. The high temperature resistant seed crystal pulling rod according to claim 1, characterized in that: Two groups of bearings (22) are provided, and a bushing (6) is provided between the two groups of bearings (22).

6. The high temperature resistant seed crystal pulling rod according to claim 5, characterized in that: The bushings (6) are provided in two groups.

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