Linear crucible lifting device

Abstract

The invention relates to the technical field of crucible hot working, in particular to a linear crucible lifting device which comprises a main vertical frame, a lifting and clamping assembly and a clamping rod assembly, a lifting machine base is arranged on the surface of the main vertical frame, a fixing base used for supporting the lifting and clamping assembly is fixedly installed on one side of the lifting machine base, and a driving motor is fixedly installed on the surface of the fixing base; the lifting and clamping assembly comprises a driving box, a main fluted disc, a plurality of movable lug plates and a linkage rod, the main fluted disc, the movable lug plates and the linkage rod are located on the inner side of the driving box, a positioning ring is fixedly installed on the inner side of the driving box, and the driving box is connected with the positioning ring through a plurality of rotating pins. According to the crucible lifting device, the multiple clamping rod assemblies are controlled to move in the radial direction through the main fluted discs and the linkage rods on the surfaces of the lifting and clamping assemblies, and one of external expansion type inner supporting positioning or external clamping positioning can be selected according to crucibles of different specifications, so that the crucible is subjected to nondestructive tooling, falling is prevented, and the stability in the lifting process is improved.

Description

Technical Field

[0001] The invention relates to the technical field of crucible thermal processing, in particular to a linear crucible lifting device. Background Art

[0002] In the industrial production process, crucibles are a common high-temperature container and are widely used in high-temperature processes such as metal smelting and crystal growth. The handling and lifting of crucibles are key links in the operation, especially in high-temperature environments. Traditional manual or semi-automatic lifting devices often cannot ensure safety and operating efficiency. At present, there are many devices for lifting crucibles on the market, but they generally have the following problems and technical defects: The first is the lifting method with holes on the crucible surface: this lifting method requires holes to be reserved on the crucible surface, and the lifting rod is inserted into the crucible hole to complete the lifting. The main problem with this method is that the integrity of the crucible surface is destroyed. During high-temperature operation, the crucible holes are prone to accumulate residues, such as molten metal or molten materials, causing the holes to be blocked or difficult to clean, increasing the complexity of subsequent operations. At the same time, the presence of holes may weaken the local structural strength of the crucible and shorten the service life of the crucible.

[0003] The second is the hoop clamping and lifting method: This crucible lifting method uses a special hoop clamp to lift the crucible by using the arc-shaped clamping ears of the clamping mechanism in conjunction with the outer wall of the crucible. Although this method avoids direct damage to the crucible body, its application range is narrow and it can usually only match crucibles of a specific diameter. Especially in some heating furnaces, since the furnace mouth size is adapted to the outer diameter of the crucible, the arc-shaped clamping ears are difficult to play a role in the limited space, resulting in unstable clamping process, and even possible lifting failure or the clamping ears cannot enter the heating furnace, limiting its flexibility and extensiveness in practical applications.

[0004] In addition, these traditional lifting methods all have a common defect, that is, the lack of real-time monitoring of the stress state of the crucible during lifting. In a high-temperature, high-load operating environment, the weight of the crucible and the complexity of the operation may lead to insufficient clamping force or slipping during the lifting process, which will affect the safety and stability of the lifting operation and increase the safety risks of the operator.

[0005] In view of the above-mentioned deficiencies in the prior art, the present invention proposes a linear crucible lifting device, which aims to solve the limitations of the traditional crucible lifting device during use through structural optimization and the introduction of an intelligent control system. By adopting a flexible coupling and a feedback detection component, real-time monitoring and automatic adjustment of the crucible clamping state are achieved to ensure stability during the lifting process. At the same time, the device has the ability to adapt to crucibles of different specifications, and can flexibly adjust the clamping method according to the actual size of the crucible, effectively improving the applicability and operating efficiency of the equipment, and ensuring the safety and reliability of the lifting process. Summary of the invention

[0006] The present invention provides a linear crucible lifting device, which can realize automatic clamping and lifting of the crucible, and has the characteristics of high safety, strong stability and wide adaptability. The specific implementation is as follows: In a possible embodiment, it includes: a main frame, a lifting and clamping assembly and a clamping rod assembly, the surface of the main frame is provided with a lifting machine base, one side of the lifting machine base is fixedly installed with a fixed seat for supporting the lifting and clamping assembly, the surface of the fixed seat is fixedly installed with a driving motor, the lifting and clamping assembly includes a driving box and a main toothed disc and a plurality of movable ear plates and a linkage rod located on the inner side of the driving box, a positioning ring is fixedly installed on the inner side of the driving box, and the driving box and the positioning ring are connected by a plurality of rotating pins, one end of the movable ear plate is rotatably sleeved on the surface of the rotating pin, the clamping rod assemblies are arranged one by one on the surface of each movable ear plate, the main toothed disc is rotatably installed on the inner side of the driving box, the two ends of the linkage rod are respectively movably connected with the surfaces of the driving box and the movable ear plate, a worm is provided at the output end of the driving motor, and a reduction gear group for transmission connection between the worm and the surface of the main toothed disc is provided on the surface of the driving box.

[0007] The device drives the lifting and clamping assembly to rotate through a driving motor, and realizes clamping control of the clamping rod assembly through the coordinated movement of the main gear plate and the movable ear plate, ensuring that the device can stably clamp the crucible during the lifting process.

[0008] In a possible embodiment, the clamping rod assembly includes a rod kit, a moving finger rod and an eccentric chuck fixed to the bottom end of the moving finger rod, the rod kit is fixed to the surface of the moving ear plate and a screw motor is provided at the top, the top of the moving finger rod is slidably sleeved on the inner side of the rod kit, the output end of the screw motor is fixedly connected to a screw rod threadedly sleeved on the inner side of the moving finger rod, and the inner side of the rod kit is provided with a slide bar for guiding the moving finger rod to slide linearly.

[0009] Through the cooperation of the screw motor and the screw, precise telescopic control of the movable finger rod is achieved, ensuring that the eccentric chuck fits well with the surface of the crucible, further enhancing the clamping effect of the crucible.

[0010] In a possible implementation, the lifting machine base is slidably sleeved on the surface of the main frame, a vertically arranged rack is provided on one side of the main frame, and a motor and creeping teeth meshing with the rack surface are provided on the surface of the lifting machine base.

[0011] This design uses a motor to control the vertical movement of the lifting base along the main frame, ensuring that the lifting device can be flexibly adjusted at different heights to meet the needs of various operating scenarios.

[0012] In a possible embodiment, the movable ear plate is in the shape of a triangular plate, and a plurality of movable ear plates are evenly distributed in a circumferential direction between the drive box and the positioning ring, and the connection points between the movable ear plate surface and the linkage rod, the positioning ring and the clamping rod assembly are respectively located at the three vertices of the movable ear plate triangle.

[0013] Through the triangular support structure design, multiple movable ear plates are evenly stressed during the process of clamping the crucible, thereby improving the clamping stability.

[0014] In a possible embodiment, a plurality of evenly distributed guide pins are provided on the surface of the drive box, a limiting guide groove is provided on the surface of the main gear disc, and the limiting guide groove is correspondingly sleeved on the surface of the guide pin, and the centers of the main gear disc, the limiting guide groove and the positioning ring are located on the same vertical axis.

[0015] The radial limit control of the main gear disc is achieved through the sleeve connection design of the limit guide groove and the guide pin, ensuring the accurate clamping position during the lifting process and preventing deviation during the clamping process.

[0016] In a possible implementation, the linkage rod is an arc-shaped linkage structure, the main gear plate is an annular structure and has the same thickness as the movable ear plate, and the main gear plate, the movable ear plate and the linkage rod are located in the same plane.

[0017] Through the reasonable arrangement between the main gear plate, the movable ear plate and the linkage rod, the uniform distribution of the clamping force is achieved, ensuring the force balance during the crucible lifting process.

[0018] In a possible implementation manner, the cross-section of the eccentric chuck is in the shape of a teardrop, the eccentric chuck is a component made of a high-temperature resistant metal material, and the outer peripheral surface of the eccentric chuck is in the shape of a frosted surface.

[0019] The teardrop-shaped eccentric chuck design increases the contact area with the crucible, and the high-temperature resistant material improves its durability and anti-slip performance, further improving the stability of clamping.

[0020] In a possible implementation, the lead screw motor and the lead screw on the surface of the rod assembly are used to drive the telescopic movement of the movable finger rod.

[0021] Through the structural design of the rod set, the lead screw motor and the lead screw can efficiently drive the movable finger rod to perform telescopic movement, ensuring accurate clamping and release of the crucible during the lifting process.

[0022] In a possible embodiment, the output end of the screw motor is connected to the top end of the screw via a flexible coupling, and a feedback detection component is arranged inside the flexible coupling. The feedback detection component includes a strain gauge and a control module for detecting the stress deformation of the flexible coupling. The strain gauge is used to detect the stress state of the moving finger rod in real time. When the force on the moving finger rod fluctuates, that is, the contact surface between the eccentric chuck and the crucible slips, the control module is electrically connected to the drive motor to control the drive motor to increase the movement spacing of the clamping rod assembly and enhance the contact effect with the crucible, so as to achieve precise control and automatic adjustment of the crucible clamping position.

[0023] Through the design of flexible coupling and feedback detection system, real-time monitoring and adjustment of the crucible clamping state are realized, ensuring the stability of the crucible during the lifting process and avoiding the occurrence of insufficient clamping force or slipping.

[0024] The beneficial effects achieved by the present invention are: 1. In the present invention, multiple clamping rod assemblies are controlled to move radially by main gear discs and linkage rods on the surface of the lifting and clamping assemblies. According to crucibles of different specifications, one of the external expansion type internal support positioning or external clamping positioning can be selected to perform non-destructive tooling on the crucible to prevent it from falling off and improve the stability during the lifting process.

[0025] 2. In the present invention, a multi-clamp rod assembly structure is adopted, and the moving finger rod and the eccentric chuck are used to perform relative moving away and approaching movements during the deflection movement of the moving ear plate. The moving finger rod and the eccentric chuck are deflected synchronously, so that the eccentric chuck and the crucible surface are more fully fitted, and a worm gear transmission method that can only be driven in one direction is adopted between the driving motor and the main gear disc to achieve locking of the crucible clamping, thereby further improving the clamping stability.

[0026] 3. In the present invention, a flexible coupling and a feedback detection component are introduced to realize real-time monitoring and automatic adjustment of the contact state between the clamping rod component and the crucible. The deformation of the flexible coupling during the clamping process is detected by a strain gauge. When insufficient clamping force or slippage of the crucible surface is detected, the system can automatically adjust the operating state of the drive motor, increase the clamping force and adjust the clamping position, thereby ensuring the stability and safety of the crucible during the clamping process. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 A schematic diagram of the surface structure of a lifting and clamping assembly according to an embodiment of the present invention; Figure 3 A schematic diagram of the internal structure of a drive box according to an embodiment of the present invention; Figure 4 It is a schematic diagram of the exploded structure of a lifting and clamping assembly according to one embodiment of the present invention; Figure 5 A schematic diagram of the installation structure of a clamping rod assembly according to an embodiment of the present invention; Figure 6 A schematic diagram of the internal structure of a clamping rod assembly according to an embodiment of the present invention; Figure 7 The figure is a schematic diagram of the main gear structure of an embodiment of the present invention.

[0028] Reference numerals: 100, main frame; 110, lifting base; 120, fixing base; 130, driving motor; 200, lifting and clamping assembly; 210, driving box; 220, main gear plate; 230, movable ear plate; 240, linkage rod; 211, positioning ring; 212, guide pin; 221, limiting guide groove; 300, clamping rod assembly; 310, rod kit; 320, moving finger rod; 330, eccentric chuck; 311, slide bar; 312, lead screw motor; 313, lead screw. DETAILED DESCRIPTION

[0029] To make the purpose, technical solution and advantages of the present invention more clear, the present invention is further described in detail below in combination with specific implementations and with reference to the accompanying drawings. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0030] It is to be understood that these descriptions are exemplary only and are not intended to limit the scope of the invention.

[0031] The following is combined with Figure 1-Figure 7 A linear crucible lifting device provided by some embodiments of the present invention is described.

[0032] Embodiment 1: In one embodiment of the present invention, a linear crucible lifting device is provided. The device comprises: a main stand 100, a lifting and clamping assembly 200 and a clamping rod assembly 300. A lifting machine base 110 is provided on the surface of the main stand 100. A fixing seat 120 for supporting the lifting and clamping assembly 200 is fixedly installed on one side of the lifting machine base 110. A driving motor 130 is fixedly installed on the surface of the fixing seat 120. The lifting and clamping assembly 200 comprises a driving box 210 and a main gear plate 220 and a plurality of movable ear plates 230 and a linkage rod 240 located inside the driving box 210. A positioning ring 211 is fixedly installed on the inside of the driving box 210. The driving box 210 and the positioning ring 211 are connected by a plurality of rotating pins, one end of the movable ear plate 230 is rotatably sleeved on the surface of the rotating pin, the clamping rod assembly 300 is arranged one by one on the surface of each movable ear plate 230, the main toothed disc 220 is rotatably installed on the inner side of the driving box 210, and the two ends of the linkage rod 240 are movably connected to the surfaces of the driving box 210 and the movable ear plate 230 respectively, a worm is provided at the output end of the driving motor 130, and a reduction gear set is provided on the surface of the driving box 210 for transmission connection between the worm and the surface of the main toothed disc 220.

[0033] In this embodiment, the worm is driven by the driving motor 130 to connect with the main gear plate 220, driving the lifting and clamping assembly 200 to rotate. At the same time, the linkage rod 240 and the movable ear plate 230 move synchronously during the rotation process, driving the clamping rod assembly 300 to move radially to clamp and release the crucible.

[0034] Furthermore, the clamping rod assembly 300 includes a rod kit 310, a movable finger rod 320 and an eccentric chuck 330 fixed to the bottom end of the movable finger rod 320, the rod kit 310 is fixed to the surface of the movable ear plate 230 and a screw motor 312 is provided at the top, the top of the movable finger rod 320 is slidably sleeved on the inner side of the rod kit 310, the output end of the screw motor 312 is fixedly connected to a screw rod 313 threadedly sleeved on the inner side of the movable finger rod 320, and the inner side of the rod kit 310 is provided with a slide bar 311 for guiding the movable finger rod 320 to slide linearly.

[0035] The screw motor 312 in this embodiment drives the moving finger rod 320 to extend and retract by linkage with the screw rod 313, and can fine-tune the height of the eccentric chuck 330, so that the eccentric chuck 330 can be close to the crucible surface during the clamping process to achieve a stable clamping effect. When the crucible is large in size, the built-in eccentric chuck 330 can be used to make the eccentric chuck 330 contact the inner wall of the crucible under radial expansion movement to achieve internal expansion clamping; when conditions are appropriate, the eccentric chuck 330 can also clamp the outer wall of the crucible by reducing the spacing movement.

[0036] The lifting machine base 110 is slidably sleeved on the surface of the main frame 100. A vertically arranged rack is provided on one side of the main frame 100. A motor and a creeping tooth meshing with the rack surface are provided on the surface of the lifting machine base 110. The lifting machine base 110 is driven by the motor to achieve vertical movement along the main frame 100, so that the device can adapt to the crucible operation requirements of different heights.

[0037] Furthermore, the movable ear plate 230 is a triangular plate structure, and a plurality of movable ear plates 230 are evenly distributed between the drive box 210 and the positioning ring 211, and the connection points between the surface of the movable ear plate 230 and the linkage rod 240, the positioning ring 211 and the clamping rod assembly 300 are located at the three vertices of the triangle. Such a triangular structure improves the control effect of the movement spacing of the clamping rod assembly 300 during radial movement, makes the force uniform during the clamping process, and reduces vibration and deviation during clamping.

[0038] The surface of the driving box 210 is provided with a plurality of evenly distributed guide pins 212, and the surface of the main gear plate 220 is provided with a limiting guide groove 221, and the limiting guide groove 221 is correspondingly sleeved with the guide pins 212 to ensure that the main gear plate 220 can be accurately positioned and its excessive movement is limited during operation.

[0039] During the clamping process, the linkage rod 240 is an arc-shaped connecting rod structure, the main gear plate 220 is an annular structure, and the thickness is the same as that of the movable ear plate 230. All these components are located in the same plane, ensuring stability and balanced force during clamping.

[0040] The eccentric chuck 330 has a teardrop-shaped cross section and is made of a high-temperature resistant metal material. Its outer peripheral surface is a frosted surface design, which can increase the contact area with the crucible and further improve the stability of the clamping and the anti-slip performance.

[0041] In this embodiment, a screw motor 312 and a screw 313 are provided on the surface of the rod set 310 to drive the movable finger rod 320 to perform telescopic movement. Through this design, the movement of the movable finger rod 320 can be effectively controlled to meet the requirements of holding crucibles of different specifications.

[0042] The output end of the screw motor 312 is connected to the screw 313 through a flexible coupling, and a feedback detection component is provided inside the flexible coupling. The component detects the stress state of the eccentric chuck 330 and the crucible surface during the clamping process through a strain gauge to prevent insufficient clamping force or crucible slippage. The system automatically adjusts the operation of the drive motor 130 through the feedback signal, increases the clamping force, and ensures stable lifting of the crucible.

[0043] Embodiment 2: In another embodiment of the present invention, the linear crucible lifting device is similar to that of the first embodiment, but the intelligent control of the lifting process is further enhanced during the clamping process.

[0044] A higher precision strain gauge is provided in the flexible coupling of the screw motor 312, which is used to monitor in real time each force change between the clamping rod assembly 300 and the crucible surface during the clamping process. When the crucible surface slips or the force is insufficient due to changes in the operating environment, the system controls the operation of the drive motor 130 through a feedback signal, connects to a shutdown program to control the equipment to shut down, and connects to an alarm prompt program.

[0045] In this embodiment, the driving motor 130 is connected to the creeping gear motor through the control module, and the electric system controls the main stand 100 to automatically adjust the height along the vertical rack. The height adjustment can be adjusted synchronously during the system lifting process, so that the crucible can be smoothly lifted to the specified height.

[0046] Through this automatic height adjustment function, the operator only needs to input the specifications and target height of the crucible, and the system can complete the automatic clamping and lifting operations, which greatly improves production efficiency and reduces the risk of errors caused by human intervention.

[0047] In Example 2, the high temperature resistant design of the eccentric chuck 330 performs better in a more extreme high temperature environment. The efficient contact between the frosted surface and the crucible ensures the stability of the crucible surface, and the clamping effect will not be affected even if the crucible temperature is too high during operation. At the same time, the system can automatically adjust the clamping force according to the temperature feedback signal of the crucible, further improving the safety and reliability of the operation.

[0048] In summary, the present invention greatly improves the efficiency and safety of the crucible lifting process through structural optimization of the clamping device and application of the intelligent control system, and is suitable for operating scenarios of crucibles of various specifications.

[0049] The working principle and use process of the present invention: 1. Working principle: The present invention realizes automatic clamping and lifting of the crucible by adopting multiple sets of electric control systems, worm gear transmission mechanisms and feedback detection systems, ensuring safety and stability during the lifting process. Its main working principles include the following aspects: Dynamic control and worm drive: The drive motor 130 provided in the device is connected to the worm drive structure to control the rotation and lifting operation of the lifting and clamping assembly 200. The drive motor 130 is engaged with the drive box 210 through the worm, driving the main gear plate 220 to rotate, so that the linkage rod 240 and the movable ear plate 230 perform synchronous radial movement, thereby controlling the clamping and release of the crucible by the clamping rod assembly 300. The worm drive mechanism has a one-way locking function, which can prevent the crucible from accidentally falling off during the clamping process and improve the clamping stability.

[0050] Flexible coupling and feedback detection: This device introduces a screw motor 312 and a feedback detection component. The system monitors the contact force between the clamping rod assembly 300 and the crucible surface in real time through a strain gauge. When insufficient clamping force or slippage of the crucible surface is detected, the feedback system automatically adjusts the operating state of the drive motor 130 to ensure that the crucible remains stable and safe during the lifting process by increasing the clamping force or adjusting the clamping position.

[0051] Adaptation to crucibles of various specifications: In the present invention, the radially adjustable design of multiple movable ear plates 230 and the clamping rod assembly 300 can automatically adjust the clamping range according to crucibles of different sizes and adapt to crucibles of different specifications. By accurately controlling the clamping position and clamping force, damage to the crucible surface is avoided, and non-destructive clamping of the crucible is achieved.

[0052] 2. Usage process: Step 1: Power on your device First, the operator turns on the control system of the lifting device, starts the electric control module, and ensures that the power supply and motor are operating normally.

[0053] Step 2: Positioning and clamping the crucible According to the position of the crucible, the height of the lifting and clamping assembly 200 is adjusted, and the movable finger rod 320 is controlled to move in a telescopic manner through the screw motor 312, so that the movable finger rod 320 is aligned with the height of the crucible. Through the electric control system, the drive motor 130 is started, driving the worm and the main gear plate 220 to start the lifting and clamping assembly 200. The movable ear plate 230 and the clamping rod assembly 300 move radially accordingly and gradually approach the surface of the crucible.

[0054] Step 3: Crucible Lifting When the crucible is firmly clamped, the system starts to lift the crucible by driving the worm mechanism through the drive motor 130. The creeping gear motor in the device cooperates with the rack on the main stand 100 to realize the vertical movement of the crucible. Through the electric control module, the operator can accurately control the lifting height and adjust the lifting speed of the crucible according to the operation requirements.

[0055] During the lifting process, the screw motor 312 and the feedback detection component will monitor in real time the stress state of the clamping rod assembly 300 when it contacts the crucible. Once the crucible shows a tendency to slip and fall off, the monitoring data of the feedback detection component will fluctuate abnormally, indicating that the clamping force is insufficient. The system will automatically increase the clamping force, adjust the movement of the clamping rod assembly 300 to prevent slipping and loosening, and automatically adjust the clamping force to ensure the safety and stability of the crucible during the entire lifting process.

[0056] 3. Intelligent control function: The present invention can also be combined with an automatic control system to fully automatically control the lifting process through a preset operating procedure, thereby reducing the risk of human error. The device can automatically select the appropriate clamping force and lifting speed according to parameters such as the size and weight of the crucible, further improving the working efficiency and applicability of the device.

[0057] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0058] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A linear crucible lifting device, characterized in that: include: A main frame (100), a lifting and clamping assembly (200) and a clamping rod assembly (300), wherein the surface of the main frame (100) is provided with a lifting machine base (110), a fixing seat (120) for supporting the lifting and clamping assembly (200) is fixedly installed on one side of the lifting machine base (110), a driving motor (130) is fixedly installed on the surface of the fixing seat (120), and the lifting and clamping assembly (200) includes a driving box (210) and a main gear plate (220) and a plurality of movable ear plates (230) and a linkage rod (240) located inside the driving box (210), and a positioning ring (211) is fixedly installed on the inside of the driving box (210). ), and the drive box (210) and the positioning ring (211) are connected via a plurality of rotating pins, one end of the movable ear plate (230) is rotatably sleeved on the surface of the rotating pin, the clamping rod assembly (300) is arranged on the surface of each movable ear plate (230) in a one-to-one correspondence, the main toothed disc (220) is rotatably mounted on the inner side of the drive box (210), the two ends of the linkage rod (240) are movably connected to the surfaces of the drive box (210) and the movable ear plate (230), respectively, the output end of the drive motor (130) is provided with a worm, and the surface of the drive box (210) is provided with a reduction gear set for transmission connection between the worm and the surface of the main toothed disc (220).

2. A linear crucible lifting device according to claim 1, characterized in that: The lifting machine base (110) is slidably sleeved on the surface of the main frame (100), a vertically arranged rack is provided on one side of the main frame (100), and a motor and creeping teeth meshing with the surface of the rack are provided on the surface of the lifting machine base (110).

3. A linear crucible lifting device according to claim 1, characterized in that: The movable ear plate (230) is in the shape of a triangular plate, and a plurality of movable ear plates (230) are evenly distributed in a circumferential direction between the drive box (210) and the positioning ring (211), and connection points between the surface of the movable ear plate (230) and the linkage rod (240), the positioning ring (211) and the clamping rod assembly (300) are respectively located in the triangle of the movable ear plate (230).

4. A linear crucible lifting device according to claim 1, characterized in that: The surface of the drive box (210) is provided with a plurality of evenly distributed guide pins (212); the surface of the main toothed disc (220) is provided with a limit guide groove (221), and the limit guide groove (221) is correspondingly sleeved on the surface of the guide pin (212); the centers of the main toothed disc (220), the limit guide groove (221) and the positioning ring (211) are located on the same vertical axis.

5. The linear crucible lifting device according to claim 1, characterized in that: The linkage rod (240) is an arc-shaped linkage structure, the main gear plate (220) is an annular structure and has the same thickness as the movable ear plate (230), and the main gear plate (220), the movable ear plate (230) and the linkage rod (240) are located in the same plane.

6. The linear crucible lifting device according to claim 1, characterized in that: The clamping rod assembly (300) comprises a rod set (310), a movable finger rod (320) and an eccentric clamp (330) fixed to the bottom end of the movable finger rod (320); the rod set (310) is fixed to the surface of the movable ear plate (230) and a screw motor (312) is provided at the top end; the top end of the movable finger rod (320) is slidably sleeved on the inner side of the rod set (310); the output end of the screw motor (312) is fixedly connected to a screw rod (313) threadedly sleeved on the inner side of the movable finger rod (320); and a slide bar (311) for guiding the movable finger rod (320) to slide linearly is provided on the inner side of the rod set (310).

7. The linear crucible lifting device according to claim 1, characterized in that: The cross section of the eccentric chuck (330) is in the shape of a water droplet; the eccentric chuck (330) is a component made of a high-temperature resistant metal material; and the outer peripheral surface of the eccentric chuck (330) is in the shape of a frosted surface.

8. The linear crucible lifting device according to claim 1, characterized in that: The lead screw motor (312) and the lead screw (313) on the surface of the rod assembly (310) are used to drive the movable finger rod (320) to perform telescopic movement.

9. The linear crucible lifting device according to claim 1, characterized in that: The output end of the screw motor (312) is connected to the top of the screw (313) via a flexible coupling, and a feedback detection component is arranged inside the flexible coupling. The feedback detection component includes a strain gauge and a control module for detecting the stress deformation of the flexible coupling. The strain gauge is used to detect the stress state of the moving finger rod (320) in real time. When the force on the moving finger rod (320) fluctuates, that is, the contact surface between the eccentric chuck (330) and the crucible slips, the control module is electrically connected to the drive motor (130) to control the drive motor (130) to increase the movement spacing of the clamping rod assembly (300) and enhance the contact effect with the crucible, so as to achieve precise control and automatic adjustment of the crucible clamping position.

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