An automatic lifting device for the base of a crystal extraction vehicle

Abstract

This utility model belongs to the technical field of photovoltaic automation devices, and discloses an automatic lifting device for the bottom tray of a crystal-retrieving cart. The automatic lifting device for the bottom tray of a crystal-retrieving cart includes a fixed plate, a clamping mechanism for holding the workpiece on the fixed plate, a guide assembly for guiding the upright, a transmission mechanism A for driving the upright, and a transmission mechanism B for driving the bottom tray up and down. The bottom tray is located at the bottom of the upright. This allows for independent movement of the crystal rod bottom tray. It also features a compact structure, convenient operation, and stable operation.

Description

Technical Field

[0001] This utility model belongs to the technical field of photovoltaic automation devices, and relates to an automatic lifting device for the bottom support of a crystal picking vehicle. Background Technology

[0002] In the field of automation within the photovoltaic industry, the traditional method of removing pulled silicon rods from the crystal pulling furnace involves manually dragging the rod removal equipment to the furnace to assist in the rod removal process. Since the silicon rods produced in the crystal pulling furnace can weigh around one ton and the high temperatures create a harsh working environment for humans, there is a strong market demand for the development of automated rod removal vehicles. The technical challenge of automated rod removal lies in the variable length of the rods produced in the furnace. During the removal process, the rod base must first support the bottom of the rod; therefore, the rod base needs to be able to stop at any position to accommodate rods of different lengths. Because the rod base is located on a moving rod, a specialized structure needs to be developed to allow the rod base to move independently. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the aforementioned background technology and provide an automatic lifting device for the bottom tray of a crystal picking cart, enabling the independent movement of the crystal rod bottom tray. Furthermore, it features a compact structure, convenient operation, and stable performance.

[0004] The technical solution adopted by this utility model to solve its technical problem is: an automatic lifting device for the bottom support of a crystal taking cart, including a fixed plate, a clamping mechanism for clamping the workpiece is provided on the fixed plate, a pole guiding assembly for guiding the pole, a transmission mechanism A for driving the pole, and a transmission mechanism B for driving the bottom support to move up and down, with the bottom support located at the bottom of the pole.

[0005] The back of the fixing plate is provided with a flange for connecting to existing equipment such as an AGV trolley for automatic lifting of the base of the mobile crystal picking vehicle.

[0006] The clamping mechanism includes a clamping motor, the output end of which is connected to a trapezoidal lead screw via a gearbox. The two nuts of the trapezoidal lead screw are each connected to a clamping gripper frame via a sliding plate. Each clamping gripper frame has a clamping gripper at its front end.

[0007] The clamping jaws have a V-shaped structure, and the V-shaped tips of the clamping jaws are fixed to the clamping jaw frame by bolts. The two clamping jaws are set facing each other.

[0008] Two sets of clamping mechanisms are set up, one on the upper part and one on the lower part of the fixed plate.

[0009] The clamping motor is mounted on the top or bottom surface of the fixed plate.

[0010] The output end of the clamping motor is connected to the upper gear in the gearbox. The upper gear meshes with the lower gear in the gearbox. The lower gear is keyed to one end of the trapezoidal lead screw to achieve drive. The other end of the trapezoidal lead screw is mounted on the fixed plate through a bearing.

[0011] The gearbox is located on the side of the fixed plate.

[0012] The slide plate is slidably connected to the fixed plate via a slider and a linear guide rail. The linear guide rail is mounted on the fixed plate, and the slider is mounted on the slide plate. The slider and the linear guide rail are slidably connected. A bellows cover is provided on the fixed plate to prevent dust.

[0013] The pole guide assembly includes a pole guide plate. The upper and lower ends of the pole guide plate are connected to the upper and lower parts of the fixing plate respectively through a connecting plate. Two pole guide plates are provided, and several guide wheels A are provided on the inner side of each plate for guiding. A guide groove is provided on the pole, and the guide groove is connected to the guide wheel A. The guide wheel A is slidably connected to the guide groove.

[0014] The upright guide plate is set on the inner side of the clamping claw frame adjacent to it.

[0015] The upright is also equipped with a rack guide groove, and a rack is installed in the rack guide groove.

[0016] The transmission mechanism A includes a drive motor A, the output end of which is connected to a drive wheel. The drive wheel meshes with a transition gear located on its outer side, and the other side of the transition gear meshes with a rack on the upright, thereby enabling the drive rack to drive the upright to move relative to each other.

[0017] The transmission mechanism B includes a drive motor B, the output end of which is connected to a drive wheel. The drive wheel is connected in sequence to a tension wheel B, an upper driven wheel, a tension wheel A, a connecting seat of the base, a tension wheel A, a bottom driven wheel, and a tension wheel B via a chain. The chain is sleeved on the outer circumference of the upright and does not contact the rack.

[0018] The drive wheel, transition gear, tension wheel B, and drive wheel are all mounted on the fixed plate, which is fixed to the fixed plate.

[0019] Drive motor A and drive motor B are respectively fixed to the fixed plate by motor fixing brackets.

[0020] The base includes a photoelectric sensor; the base is connected to the upright via a chain and guide wheel B, enabling it to move up and down on the upright; the photoelectric sensor is mounted on the side wall of the upright via a bracket, and is positioned above the reflector of the base; the base includes a positioning plate, with a connecting seat on the back for connection to the chain, and the bottom end of the positioning plate connected to the base plate; the positioning plate also has a guide groove for guiding the vertical displacement of the pressure plate adjustment seat; a movable pressure plate is positioned above the base plate, and the bottom surface of the movable pressure plate is connected to the base plate of the pressure plate adjustment seat; a connector is positioned on the upper back of the adjustment plate of the pressure plate adjustment seat, and the connector passes through the guide groove and is fixedly connected to the limiting groove; a fork for adjusting the movement of the light shield is positioned in the limiting groove, and a reflector is positioned below the light shield; the bottom of the base plate is elastically connected to the base plate via a return spring and a guide post.

[0021] The top of the guide post is connected to the base plate, and the bottom of the guide post extends out of the base plate. The reset spring is sleeved on the outside of the guide post and is located between the base plate and the base plate.

[0022] A guide assembly for guiding is also provided between the base plate and the bottom plate. The guide assembly includes a guide shaft and a bushing. The top of the guide shaft is connected to the base plate, the bottom of the guide shaft extends out of the bottom plate, and a bushing is provided at the connection between the guide shaft and the bottom plate.

[0023] The pressure plate adjusting seat includes a base plate and an adjusting plate. The base plate has a contoured base supporting a movable pressure plate, and the base plate is fixedly connected to the movable pressure plate, preferably by bolts. The adjusting plate is vertically positioned in front of the positioning plate, and two adjusting plates are provided. The upper back of each adjusting plate is fixedly connected to a limiting groove. The connector between the adjusting plate and the limiting groove passes through a guide groove on the positioning plate. Bolts or other connectors that can achieve a stable connection are preferred.

[0024] The upper and lower parts of the connecting seat are connected to the chain via pins. Guide plates are provided on both sides of the connecting seat, and a guide wheel B is provided on the inner side of each guide plate. The guide wheel B is used to movably connect with the upright. Preferably, the upright is provided with a guide groove for the guide wheel B to slide, and the guide wheel B is movably connected within the guide groove.

[0025] The limiting groove is preferably a U-shaped groove structure. A fork is set inside the limiting groove. The outer periphery of the cylindrical end of the fork is tangent to the inner wall of the limiting groove. The fork includes a rectangular block and a cylindrical end. The rectangular block is set at the front end of the cylindrical end. A light-shielding plate is set at the front end of the rectangular block. The light-shielding plate is inclined. The bottom of the light-shielding plate is connected to the rectangular block. The connection between the rectangular block and the cylindrical end is connected to the guide plate through a pin. The setting enables the fork to drive the light-shielding plate to swing when the limiting groove moves up and down with the pressure plate adjusting seat.

[0026] The base also includes baffles to prevent crystal rods from scraping and splashing when they fall onto the base. Two baffles are provided, located on the outer periphery of the base plate, with the front end preferably having a V-shaped structure. The baffles are fixed by connecting to the base plate, positioning plate, and guide plate. A support plate is provided between the guide plate and the positioning plate for support and fixation.

[0027] The base plate, base plate, and movable pressure plate of the base support are all provided with through holes for placing workpiece crystal rods.

[0028] The reflector is preferably fixed to the guide plate or baffle by a bracket, and the fixing can be set as needed.

[0029] The preferred photoelectric sensor model is Omron E3JK-RR11-2M-R (free power supply type, retroreflective type).

[0030] The device is also equipped with a PLC control system. The photoelectric sensor, drive motor A, drive motor B, and clamping motor are connected to the PLC control system to achieve signal feedback, informing the existing crystal-picking cart whether the crystal rod is in place and to realize transmission.

[0031] The advantages of this utility model compared with the prior art are:

[0032] This invention provides an automatic lifting device for the crystal rod tray, enabling independent movement of the crystal rod tray. It features a compact structure, convenient operation, and stable performance. The automatic lifting of the crystal rod tray can stop at any position, accommodating crystal rods of all lengths. The drive motor for the crystal rod tray does not move with the tray, thus avoiding the problem of difficult motor cable routing. Compared to manual crystal rod removal methods, this significantly reduces labor intensity. Attached Figure Description

[0033] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0034] Figure 1 This is a perspective view of an automatic lifting device for the bottom support of a crystal-retrieving vehicle, with a workpiece attached.

[0035] Figure 2 This is a perspective view of an automatic lifting device for the bottom support of a crystal extraction vehicle according to this utility model.

[0036] Figure 3 This is a front view of an automatic lifting device for the bottom support of a crystal-retrieving vehicle according to this utility model.

[0037] Figure 4 yes Figure 3 CC section view.

[0038] Figure 5 yes Figure 4 Enlarged schematic diagram of part I.

[0039] Figure 6yes Figure 4 Enlarged schematic diagram of Part II.

[0040] Figure 7 This is a perspective view of the clamping mechanism of this utility model.

[0041] Figure 8 This is a perspective view of the clamping mechanism of this utility model removing the bellows cover.

[0042] Figure 9 This is a perspective view of the base of this utility model.

[0043] Figure 10 This is the front view of the base of this utility model.

[0044] Figure 11 This is a side view of the base of this utility model.

[0045] Figure 12 This is a top view of the base of this utility model.

[0046] In the diagram: 1. Workpiece, 2. Fixing plate, 3. Upright pole, 4. Base support, 5. Clamping mechanism, 6. Bellows cover, 201. Flange, 301. Chain, 302. Tensioner A, 303. Bottom driven wheel, 304. Drive motor A, 305. Drive motor B, 306. Upper driven wheel, 307. Drive wheel, 308. Tensioner B, 309. Transition gear, 310. Drive wheel, 311. Rack guide groove, 312. Guide wheel A, 401. Return spring, 402. Base support 403. Adjustable pressure plate; 404. Base plate; 405. Sunshade plate; 406. Reflector plate; 407. Shift fork; 408. Limiting groove; 409. Positioning plate; 410. Connecting seat; 411. Guide wheel B; 412. Baffle; 413. Guide plate; 414. Guide groove; 415. Guide post; 416. Guide shaft; 417. Bushing; 501. Clamping motor; 502. Gearbox; 503. Clamping gripper frame; 504. Clamping gripper; 505. Trapezoidal lead screw. Detailed Implementation

[0047] The present invention will be further described below with reference to the accompanying drawings, but the present invention is not limited to the following embodiments.

[0048] Example 1

[0049] An automatic lifting device for the base of a crystal extraction vehicle, such as Figure 1-12 As shown, an automatic lifting device for the bottom support of a crystal-retrieving vehicle includes a fixed plate 2, a clamping mechanism 5 for clamping the workpiece 1 on the fixed plate 2, a pole guiding assembly for guiding the pole 3, a transmission mechanism A for driving the pole 3, and a transmission mechanism B for driving the bottom support 4 to move up and down. The bottom support 4 is located at the bottom of the pole 3.

[0050] The back of the fixing plate 2 is provided with a flange 201 for connecting to existing equipment such as an AGV trolley for automatic lifting of the base of the mobile crystal picking vehicle.

[0051] The clamping mechanism 5 includes a clamping motor 501. The output end of the clamping motor 501 is connected to a trapezoidal lead screw 505 via a gearbox 502. The two nuts of the trapezoidal lead screw 505 are respectively connected to a clamping gripper frame 503 via a sliding plate. A clamping gripper 504 is provided at the front end of each clamping gripper frame 503.

[0052] The clamping jaw 504 has a V-shaped structure. The V-shaped tip of the clamping jaw 504 is fixed to the clamping jaw frame 503 by bolts. The two clamping jaws 503 are arranged facing each other.

[0053] Two sets of clamping mechanisms 5 are provided, one on the upper part and one on the lower part of the fixed plate 2.

[0054] The clamping motor 501 is mounted on the top surface of the fixing plate 2 or the bottom surface of the fixing plate 2.

[0055] The output end of the clamping motor 501 is connected to the upper gear in the gearbox 502. The upper gear meshes with the lower gear in the gearbox 502. The lower gear is keyed to one end of the trapezoidal lead screw 505 to achieve drive. The other end of the trapezoidal lead screw 505 is mounted on the fixed plate 2 through a bearing.

[0056] The gearbox 502 is disposed on the side of the fixed plate 2.

[0057] The slide plate is slidably connected to the fixed plate 2 via a slider and a linear guide rail. The linear guide rail is mounted on the fixed plate 2, and the slider is mounted on the slide plate. The slider and the linear guide rail are slidably connected. An accordion cover 6 is provided on the fixed plate 2 to prevent dust.

[0058] The pole guide assembly includes a pole guide plate. The upper and lower ends of the pole guide plate are connected to the upper and lower parts of the fixing plate 2 respectively through a connecting plate. Two pole guide plates are provided, and several guide wheels A312 are provided on the inner side of each plate for guiding. A guide groove is provided on the pole 3. The guide groove is connected to the guide wheel A312, and the guide wheel A312 is slidably connected to the guide groove.

[0059] The upright guide plate is set on the inner side of the clamping claw frame 503 adjacent to it.

[0060] The upright 3 is also provided with a rack guide groove 311, and a rack is installed in the rack guide groove 311.

[0061] The transmission mechanism A includes a drive motor A304. The output end of the drive motor A304 is connected to a drive wheel 310. The drive wheel 310 is meshed with a transition gear 309 located on its outer side. The other side of the transition gear 309 is meshed with a rack on the upright 3, so as to realize that the drive rack drives the upright 3 to move relative to each other.

[0062] The transmission mechanism B includes a drive motor B305. The output end of the drive motor B305 is connected to the drive wheel 307. The drive wheel 307 is connected in sequence to the tension wheel B308, the upper driven wheel 306, the tension wheel A302, the connecting seat 410 of the base 4, the tension wheel A302, the bottom driven wheel 303, and the tension wheel B308 via a chain 301. The chain 301 is sleeved on the outer periphery of the upright 3 and does not contact the rack.

[0063] The drive wheel 310, transition gear 309, tension wheel B308, and drive wheel 307 are all mounted on the fixed plate, which is fixed to the fixed plate 2.

[0064] Drive motor A and drive motor B are respectively fixed to the fixed plate by motor fixing brackets.

[0065] The base 4 includes a photoelectric sensor; the base 4 is connected to the upright 3 via a chain 301 and a guide wheel B411, enabling the base 4 to move up and down on the upright 3; the photoelectric sensor is mounted on the side wall of the upright 3 via a bracket, and is positioned above the reflector 406 of the base 4; the base 4 includes a positioning plate 409, with a connecting seat 410 on the back of the positioning plate 409 for connecting to the chain 301, and the bottom end of the positioning plate 409 is connected to the base plate 404; the positioning plate 409 also has... A guide groove 414 is provided for the vertical displacement of the pressure plate adjustment seat 403. A bottom support movable pressure plate 402 is provided above the base plate 404. The bottom surface of the bottom support movable pressure plate 402 is connected to the base plate of the pressure plate adjustment seat 403. A connector is provided on the back of the upper part of the adjustment plate of the pressure plate adjustment seat 403. The connector passes through the guide groove 414 and is fixedly connected to the limiting groove 408. A fork 407 for adjusting the movement of the light shield 405 is provided in the limiting groove 408. A reflector 406 is provided below the light shield 405.

[0066] The bottom of the base plate is elastically connected to the base plate 404 via a reset spring 401 and a guide post 415.

[0067] The top of the guide post 415 is connected to the base plate, and the bottom of the guide post 415 extends out of the base plate 404. The reset spring 401 is sleeved on the outside of the guide post 415 and is located between the base plate and the base plate 404.

[0068] A guide assembly for guiding is also provided between the base plate and the base plate 404. The guide assembly includes a guide shaft 416 and a bushing 4117. The top of the guide shaft 416 is connected to the base plate, and the bottom of the guide shaft 416 extends out of the base plate 404. The bushing 417 is provided at the connection between the guide shaft 416 and the base plate 404.

[0069] The pressure plate adjusting seat 403 includes a base plate and an adjusting plate. The base plate is configured to support the movable pressure plate 402 in a contoured manner. The base plate and the movable pressure plate 402 are fixedly connected, preferably by bolts. The adjusting plate is vertically positioned in front of the positioning plate 409. Two adjusting plates are configured, and the upper back of each adjusting plate is fixedly connected to the limiting groove 408. The connector connecting the adjusting plate to the limiting groove 408 passes through the guide groove 414 on the positioning plate 409. Bolts or other connectors that can achieve a stable connection are preferred.

[0070] The upper and lower parts of the connecting seat 410 are connected to the chain 301 via pins. Guide plates 413 are provided on both sides of the connecting seat 410, and guide wheels B411 are provided on the inner side of each guide plate 413. The guide wheels B411 are used to movably connect with the upright 3. Preferably, the upright 3 is provided with a guide groove for the sliding of the guide wheels B411, and the guide wheels B411 are movably connected within the guide groove.

[0071] The limiting groove 408 is preferably a U-shaped groove structure. A fork 407 is provided inside the limiting groove 408. The outer periphery of the cylindrical end of the fork 407 is tangent to the inner wall of the limiting groove 408. The fork 407 includes a rectangular block and a cylindrical end. The rectangular block is located at the front end of the cylindrical end. A light shield 405 is provided at the front end of the rectangular block. The light shield 405 is inclined and its bottom is connected to the rectangular block. The connection between the rectangular block and the cylindrical end is connected to the guide plate 413 through a pin. The fork 407 is configured to drive the light shield 405 to swing when the limiting groove 408 moves up and down with the pressure plate adjusting seat 403.

[0072] The base 4 also includes baffles 412 for preventing crystal rods from falling onto the base 4 and causing scratches or splashes. Two baffles 412 are provided, located on the outer periphery of the base plate 404, with the front end preferably having a V-shaped structure. The baffles 412 are fixed by connecting to the base plate 404, the positioning plate 409, and the guide plate 413. A support plate is provided between the guide plate 413 and the positioning plate 409 for support and fixation.

[0073] The base plate 404, the base plate, and the movable pressure plate 402 of the base support are all provided with through holes for placing the workpiece crystal rod.

[0074] The reflector 406 is preferably fixed to the guide plate 413 or the baffle 412 by a bracket, and can be fixed as needed.

[0075] The preferred photoelectric sensor model is Omron E3JK-RR11-2M-R (free power supply type, retroreflective type).

[0076] The device is also equipped with a PLC control system. The photoelectric sensor, drive motor A304, drive motor B305, and clamping motor 501 are connected to the PLC control system to achieve signal feedback, informing the existing crystal-retrieving cart whether the crystal rod is in place and to realize transmission.

[0077] In actual operation, the drive motor A304, which drives the upright 3 to rise and fall, drives the drive wheel 310 and the transition gear 309 to mesh with the rack on the upright 3 (which has a rack). The rotation of the drive motor A304, which drives the upright 3 to rise and fall, enables the upright 3 (with a rack) to move up and down.

[0078] The drive motor B305, which drives the base 4 to rise and fall, drives the crystal-picking base 4 to rise and fall relative to the upright rod 3 (with a rack) through the drive wheel 307, chain 301 and driven wheel.

[0079] When the drive motor A304, which drives the upright pole 3 to rise and fall, rotates in the forward direction, and the drive motor B305, which drives the base support 4 to rise and fall, stops, the upright pole 3 (with rack) rises, and at the same time the base support 4 is raised relative to the upright pole 3 (with rack).

[0080] When the drive motor A304, which drives the upright pole 3 to rise and fall, rotates in the forward direction, and the drive motor B305, which drives the base support 4 to rise and fall, rotates in the reverse direction, the upright pole 3 (with rack) rises, while the base support 4 remains stationary relative to the upright pole 3 (with rack).

[0081] When the drive motor A304, which drives the upright 3 to rise and fall, rotates in the opposite direction, and the drive motor B305, which drives the base support 4 to rise and fall, stops, the upright 3 (with rack) descends, and at the same time, the base support 4 descends relative to the upright 3 (with rack).

[0082] When the drive motor A304, which drives the upright 3 to rise and fall, rotates in the reverse direction, and the drive motor B305, which drives the base support 4 to rise and fall, rotates in the forward direction, the upright 3 (with rack) descends, while the base support 4 remains stationary relative to the upright 3 (with rack).

[0083] The base 4 is mounted on the upright 3 and connected via a chain 301 and a connecting seat 410. The photoelectric sensor 1 is mounted on the side wall of the upright 3. When operation is required, the movable pressure plate 402 of the base 4 moves upward along with the chain 301. The guide wheel 311 guides the upward movement on the upright 3. When the plate rises and contacts the crystal rod, the weight of the crystal rod pushes the movable pressure plate 402 downward. Simultaneously, the pressure plate adjusting seat 403 moves downward, causing the limiting groove 408 to move downward. This, in turn, causes the shift fork 407 to swing the light-shielding plate 405, causing the light-shielding plate 405 to flip upward. The photoelectric sensor and the reflector 406 are connected by an optical path. The photoelectric sensor outputs a signal that the crystal rod contacts the base 4. The PLC control system can send a signal to the existing robot or other equipment to remove the crystal rod. When the crystal rod is removed, the reset spring 401 resets and pushes the movable pressure plate 402 and the pressure plate adjusting seat 403 of the base to reset. Then, the pressure plate adjusting seat 403 drives the limiting groove 408 to move upward, which in turn drives the fork 407 to swing the light shield 405, so that the light shield 405 resets. At this time, the optical path between the photoelectric sensor and the reflector 406 is blocked. The photoelectric sensor outputs a signal that the crystal rod is removed.

[0084] Although the present invention has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A device for automatically lifting a bottom support of a crystal pulling machine, characterized in that, It includes a fixed plate (2), a clamping mechanism (5) for clamping the workpiece (1) is provided on the fixed plate (2), a pole guide assembly for guiding the pole (3) is also provided on the fixed plate (2), and a transmission mechanism A for driving the pole (3) and a transmission mechanism B for driving the bottom support (4) to move up and down. The bottom support (4) is located at the bottom of the pole (3).

2. The automatic lifting device for the bottom support of a crystal pulling machine according to claim 1, wherein The clamping mechanism (5) includes a clamping motor (501), the output end of which is connected to a trapezoidal lead screw (505) via a gearbox (502). The two nuts of the trapezoidal lead screw (505) are respectively connected to a clamping claw frame (503) via a sliding plate. Each clamping claw frame (503) has a clamping claw (504) at its front end.

3. The automatic lifting device for the base of the crystal-retrieving vehicle as described in claim 1, characterized in that, The pole guide assembly includes a pole guide plate. The upper and lower ends of the pole guide plate are connected to the upper and lower parts of the fixing plate (2) respectively through a connecting plate. Two pole guide plates are provided, and several guide wheels A (312) are provided on the inner side of each plate for guiding. A guide groove is provided on the pole (3). The guide groove is connected to the guide wheel A (312), and the guide wheel A (312) is slidably connected to the guide groove.

4. The automatic lifting device for the bottom support of a crystal pulling machine according to claim 1, wherein The upright (3) is also provided with a rack guide groove (311), and a rack is provided in the rack guide groove (311).

5. The automatic lifting device for the base of the crystal-retrieving vehicle as described in claim 1, characterized in that, The transmission mechanism A includes a drive motor A (304), the output end of which is connected to a drive wheel (310). The drive wheel (310) is meshed with a transition gear (309) located on its outer side. The other side of the transition gear (309) is meshed with a rack on the upright (3), thereby driving the rack to drive the upright (3) to move relative to each other.

6. The automatic lifting device for the bottom support of a crystal pulling machine according to claim 1, wherein The transmission mechanism B includes a drive motor B (305), the output end of which is connected to a drive wheel (307). The drive wheel (307) is connected in sequence to a tension wheel B (308), an upper driven wheel (306), a tension wheel A (302), a connecting seat (410) of the base (4), a tension wheel A (302), a bottom driven wheel (303), and a tension wheel B (308) via a chain (301). The chain (301) is sleeved on the outer periphery of the upright (3) and does not contact the rack.

7. The automatic lifting device for the bottom support of a crystal pulling machine according to claim 1, wherein, The base (4) includes a photoelectric sensor; the base (4) is connected to the upright (3) via a chain (301) and a guide wheel B (411) to enable the base (4) to move up and down on the upright (3); the photoelectric sensor is mounted on the side wall of the upright (3) via a bracket, and the photoelectric sensor is mounted above the reflector (406) of the base (4); the base (4) includes a positioning plate (409), the back of the positioning plate (409) is provided with a connecting seat (410) for connecting with the chain (301), the bottom end of the positioning plate (409) is connected to the base plate (404), and the positioning plate (409) The plate is also provided with a guide groove (414) for guiding the pressure plate adjustment seat (403) to move up and down. A bottom support movable pressure plate (402) is provided above the bottom plate (404). The bottom surface of the bottom support movable pressure plate (402) is connected to the base plate of the pressure plate adjustment seat (403). A connector is provided on the back of the upper part of the adjustment plate of the pressure plate adjustment seat (403). The connector passes through the guide groove (414) and is fixedly connected to the limiting groove (408). A fork (407) for adjusting the movement of the light shield (405) is provided in the limiting groove (408). A reflector (406) is provided below the light shield (405).

8. A device for automatically lifting and lowering a bottom support of a wafer carrier as set forth in claim 2, wherein The output end of the clamping motor (501) is connected to the upper gear in the gearbox (502), the upper gear meshes with the lower gear in the gearbox (502), the lower gear is keyed to one end of the trapezoidal screw (505) to achieve drive, and the other end of the trapezoidal screw (505) is mounted on the fixed plate (2) through a bearing.

9. The automatic lifting device for the bottom support of a crystal pulling machine according to claim 2, wherein The slide plate is slidably connected to the fixed plate (2) via a slider and a linear guide rail. The linear guide rail is set on the fixed plate (2), and the slider is set on the slide plate. The slider and the linear guide rail are slidably connected.

10. The automatic lifting device for the base of the crystal-retrieving vehicle as described in claim 7, characterized in that, The bottom of the base plate is elastically connected to the base plate (404) via a reset spring (401) and a guide post (415).

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