Vegetable greenhouse sunshade device

Abstract

The utility model provides a vegetable greenhouse sunshade device, which relates to the technical field of agricultural facilities, and comprises a fixed plate and a support frame arranged on the periphery of a greenhouse, the top of the fixed plate is symmetrically and fixedly connected with a support plate, and the top of the fixed plate is rotatably connected with a lifting assembly through a bearing; a replacement assembly is slidably connected to the outer wall of the fixing plate and comprises a lifting frame slidably connected to the outer wall of the supporting plate, and a driving assembly is arranged in the lifting frame. A mounting and replacing assembly utilizes gear and rack transmission to enable a moving plate to move symmetrically and accurately, it is ensured that a cloth roller is stably clamped in a clamping block, a bearing plate drives a two-way threaded rod through a fourth motor, the bearing position can be accurately adjusted according to the size of the cloth roller through adjustment of a sliding block and a connecting rod, stable supporting is provided for the cloth roller, and the mounting stability is guaranteed; the sunshade effect is improved, the replacement time is greatly shortened, and the efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to agricultural facilities technical field especially relates to a vegetable greenhouse sunshade device. BACKGROUND

[0002] Vegetable greenhouse, also known as greenhouse, is a kind of artificial construction agricultural facilities, by covering transparent or semi-transparent material (such as plastic film, glass or PC board), creates a relatively closed, controllable microclimate environment for vegetable growth. It utilizes solar energy to heat the interior space, reduces heat loss, thereby prolongs the planting cycle of vegetables, improves yield and quality.

[0003] Traditional sunshade cloth roller replacement mode is mostly manual operation, needs to consume a lot of manpower and time. In the replacement process, staff need to use tools to first disassemble the old cloth roller, then carefully install the new cloth roller, the whole process is cumbersome, and the efficiency is low, especially in large-scale vegetable planting base, the sunshade cloth roller of numerous greenhouses needs to be replaced regularly, which increases labor intensity and time cost, and affects the replacement efficiency. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of vegetable greenhouse sunshade device to solve the problems raised in the above background.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme: a kind of vegetable greenhouse sunshade device, including fixed plate and the support frame being set at the periphery of greenhouse, the top of the fixed plate is fixedly connected with support plate in symmetry, the top of the fixed plate is rotatably connected with lifting assembly by bearing, the outer wall of the fixed plate is slidably connected with replacement assembly;

[0006] The replacement assembly includes lifting frame slidably connected to the outer wall of the support plate, the inside of the lifting frame is provided with driving assembly, the top of the outer shell is fixedly connected with the top of the outer shell, the top center of the outer shell is symmetrically provided with limit sliding groove, two limit sliding grooves are slidably connected with moving plate on the top surface, two moving plates are rotatably connected with clamping block in the inside through bearing, two clamping blocks are clamped with cloth roller, one end of one clamping block is installed with third motor on the surface of moving plate, the top of the outer shell is symmetrically fixedly connected with mounting bracket in the middle, the inner cavity wall bottom of the mounting bracket two sides is rotatably connected with bidirectional screw rod through bearing, the two ends of the bidirectional screw rod are threadedly sleeved with sliding block, the inner cavity wall top of the mounting bracket two sides is slidably connected with supporting plate, the bottom of the supporting plate is connected with connecting rod through pivot between the surface of sliding block in the middle, the outer wall of the moving plate is fixedly connected with clamping assembly, the top of the support frame is provided with moving assembly.

[0007] Preferably, the driving assembly comprises a rotating rod rotatably connected inside the lifting frame through a bearing, the top end of the rotating rod is connected with a first gear inside the shell, the two sides of the first gear are respectively engaged with two racks on the inner cavity walls of the shell, one side of the bottom of the two moving plates is fixedly connected with the corresponding rack through the corresponding limiting sliding slot, the side surface of the rack is slidingly connected with the inner cavity wall of the shell, the bottom of the lifting frame is fixedly connected with a second motor, and the output end of the second motor penetrates the lifting frame and is fixedly connected with the bottom of the rotating rod.

[0008] Preferably, the outer wall of the mounting frame is fixedly connected with a fourth motor, and the output end of the fourth motor penetrates the mounting frame and is fixedly connected with the outer wall of the bidirectional threaded rod.

[0009] Preferably, the clamping assembly comprises a first electric push rod fixedly connected to the outer wall of the moving plate, the output end of the first electric push rod is fixedly connected with a moving strip plate, one side of the outer wall of the moving strip plate is fixedly connected with a guide groove, the inside of the guide groove is slidingly connected with a plug plate, the top of the plug plate is symmetrically provided with clamping grooves on both sides, a plurality of plug holes are formed in the top of the plug plate, a second electric push rod is installed on the top of the moving strip plate at the corresponding position of the guide groove, and the output end of the second electric push rod is fixedly connected with a plug block in the inside of the moving strip plate, wherein the inside of the guide groove is in communication with the inside of the moving strip plate, and the shape of the plug block is matched with the shape and size of the clamping groove on the top of the plug plate.

[0010] Preferably, the moving assembly comprises lead screws rotatably connected on the top of the support frame through bearings, one end of one side of the lead screws is connected with a motor on the side surface of the support frame, one end of the two lead screws is connected with a second gear on the side surface of the support frame, the two second gears are connected with a synchronous belt, the top of the lead screw is threadedly connected with a moving frame, the inside of the moving frame is provided with a plug groove, the plug plate is insertedly connected with the plug groove, the top of the moving frame is fixedly connected with a hydraulic cylinder, the output end of the hydraulic cylinder is fixedly connected with a connecting plate in the inside of the plug groove, a plurality of protruding blocks are welded on the bottom surface of the connecting plate, and the protruding blocks are clamped in the inside of the plug holes.

[0011] Preferably, the lifting assembly comprises a rotating rod rotatably connected inside the support plate through a bearing, the outer wall of the rotating rod is fixedly connected with winding rollers, the outer wall of the winding roller is wound with a steel wire, the top of the support plate is fixedly connected with a guide wheel, the outer wall of the steel wire is in contact with the outer wall of the guide wheel, the end of the steel wire is fixedly connected with the top of the lifting frame, the outer wall of the support plate is fixedly connected with a first motor, and the output end of the first motor is fixedly connected with the rotating rod.

[0012] Preferably, the inside of the connecting plate is provided with a cross groove, the two ends of the cloth roller are cross blocks, and the cross groove of the connecting plate is clampedly and fixedly connected with the cross blocks of the cloth roller.

[0013] Preferably, the outer wall of the cloth roller is wrapped with sunshade cloth, one end of the sunshade cloth is connected with the bottom of the plugboard through a screw.

[0014] Compared with the prior art, the advantages and positive effects of the utility model are that,

[0015] 1、the utility model discloses, through installation replacement assembly utilize gear rack drive, make moving plate symmetry and accurate movement, ensure that cloth roller is stably clamped in the clamping block, the supporting plate passes through the fourth motor drive bidirectional screw rod, adjusts through the sliding block and the connecting rod, can accurate adjustment supporting position according to cloth roller size, provide stable support for cloth roller, guarantee installation stability, improve sunshade effect, greatly shorten replacement time, improve efficiency.

[0016] 2、the utility model discloses, through installation clamping assembly can automatically lock or loosen the sunshade cloth and the plugboard connected with the sunshade cloth, do not need artificial climbing and lock and loosen the sunshade cloth, reduce the operation difficulty, reduce artificial error, improve replacement efficiency. DRAWINGS

[0017] Figure 1 a kind of vegetable greenhouse sunshade device main view structure perspective view is proposed for the utility model;

[0018] Figure 2 replacement assembly structure schematic view of a kind of vegetable greenhouse sunshade device is proposed for the utility model;

[0019] Figure 3 drive piece structure schematic view of a kind of vegetable greenhouse sunshade device is proposed for the utility model;

[0020] Figure 4 plugboard structure schematic view of a kind of vegetable greenhouse sunshade device is proposed for the utility model;

[0021] Figure 5 A structure schematic view of a kind of vegetable greenhouse sunshade device is proposed for the utility model;

[0022] Figure 6 cloth roller structure schematic view of a kind of vegetable greenhouse sunshade device is proposed for the utility model;

[0023] Figure 7 clamping block structure schematic view of a kind of vegetable greenhouse sunshade device is proposed for the utility model;

[0024] Figure 8 support frame structure schematic view of a kind of vegetable greenhouse sunshade device is proposed for the utility model;

[0025] Figure 9 moving frame structure schematic view of a kind of vegetable greenhouse sunshade device is proposed for the utility model.

[0026] Legend:

[0027] 1, fixed plate; 2, support plate; 3, lifting assembly; 301, rotating rod; 302, winding roller; 303, steel rope; 304, guide wheel; 305, first motor; 4, replacement assembly; 401, lifting frame; 402, rotating rod; 403, first gear; 404, rack; 405, housing; 4051, limiting sliding groove; 406, moving plate; 407, clamping block; 408, cloth roller; 409, second motor; 410, third motor; 411, mounting frame; 412, bidirectional threaded rod; 413, fourth motor; 414, sliding block; 415, connecting rod; 416, supporting plate; 418, first electric push rod; 419, moving strip plate; 4191, guide groove; 4192, clamping groove; 420, plug-in plate; 4201, insertion hole; 421, second electric push rod; 422, motor; 4211, lead screw; 423, second gear; 424, synchronous belt; 425, moving frame; 426, hydraulic cylinder; 427, connecting plate; 4271, insertion slot; 4272, protrusion; 428, support frame; 429, sunshade cloth. DETAILED DESCRIPTION

[0028] In order to more clearly understand the above purpose, features and advantages of the present application, the following will be further described in conjunction with the drawings and examples. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0029] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, however, the present application can be practiced in other ways different from those described herein, therefore, the present application is not limited to the specific embodiments disclosed in the following description.

[0030] Please refer to Figures 1-9 The present application provides a technical scheme: a vegetable greenhouse sunshade device, comprising a fixed plate 1 and a support frame 428 arranged on the periphery of the greenhouse, the top of the fixed plate 1 is symmetrically and fixedly connected with a support plate 2, the top of the fixed plate 1 is rotatably connected with a lifting assembly 3 through a bearing, and the outer wall of the fixed plate 1 is slidably connected with a replacement assembly 4.

[0031] The replacement assembly 4 comprises a lifting frame 401 slidably connected to the outer wall of the support plate 2, the inside of the lifting frame 401 is provided with a driving assembly, the top of the lifting frame 401 is fixedly connected with an outer shell 405, the top center of the outer shell 405 is symmetrically provided with a limiting sliding groove 4051, two movable plates 406 are slidably connected to the top surfaces of the two limiting sliding grooves 4051, two clamping blocks 407 are rotatably connected to the insides of the two movable plates 406 through bearings, a cloth roller 408 is clamped between the two clamping blocks 407, one end of one of the clamping blocks 407 is provided with a third motor 410 mounted on the surface of the movable plate 406, the top center of the outer shell 405 is fixedly connected with a mounting frame 411, the two-side inner cavity walls of the mounting frame 411 are rotatably connected with bidirectional screw rods 412 through bearings, the two ends of the bidirectional screw rods 412 are threadedly sleeved with sliding blocks 414, the two-side inner cavity walls of the mounting frame 411 are slidably connected with supporting plates 416, the bottom center of the supporting plate 416 is connected with the sliding block 414 through a rotating shaft, the outer wall of the movable plate 406 is fixedly connected with a clamping assembly, the top of the support frame 428 is provided with a moving assembly, the movable plate 406 is moved close to the cloth roller 408 through the driving assembly, and then the two sides of the cloth roller 408 are clamped through the clamping blocks 407 mounted in the movable plate 406, and the supporting plate 416 can lift the cloth roller 408, thereby saving manpower.

[0032] Further, the driving assembly comprises a rotating rod 402 rotatably connected to the inside of the lifting frame 401, the top end of the rotating rod 402 is connected with a first gear 403 in the inside of the outer shell 405, the two sides of the first gear 403 are respectively hingedly connected with racks 404 on the two-side inner cavity walls of the outer shell 405, the bottom sides of the two movable plates 406 are fixedly connected with the corresponding racks 404 through the corresponding limiting sliding grooves 4051, the side surfaces of the racks 404 are slidably connected with the two-side inner cavity walls of the outer shell 405, the bottom of the lifting frame 401 is fixedly connected with a second motor 409, the output end of the second motor 409 penetrates through the lifting frame 401 and is fixedly connected with the bottom of the rotating rod 402, the movable plate 406 connected with the top of the rack 404 is driven to move towards or away from each other through the second motor 409, so that the clamping or loosening is better.

[0033] Further, the outer wall of the mounting frame 411 is fixedly connected with a fourth motor 413, the output end of the fourth motor 413 penetrates through the mounting frame 411 and is fixedly connected with the outer wall of the bidirectional screw rod 412.

[0034] Further, the card joint assembly comprises a first electric push rod 418 fixedly connected to the outer wall of the moving plate 406, the output end of the first electric push rod 418 is fixedly connected with a moving strip plate 419, one side of the outer wall of the moving strip plate 419 is fixedly connected with a guide groove 4191, the inside of the guide groove 4191 is slidably connected with an insertion plate 420, the top of the insertion plate 420 is symmetrically provided with clamping grooves 4192 on both sides, a plurality of insertion holes 4201 are formed in the top of the insertion plate 420, a second electric push rod 421 is installed at the corresponding position of the guide groove 4191 on the top of the moving strip plate 419, and the output end of the second electric push rod 421 is fixedly connected with an insertion block in the inside of the moving strip plate 419, wherein the inside of the guide groove 4191 is in communication with the inside of the moving strip plate 419, the shape of the insertion block matches the shape and size of the clamping groove 4192 on the top of the insertion plate 420, the first electric push rod 418 can drive the moving strip plate 419 to move in and out, and the second electric push rod 421 drives the insertion block to be inserted into the clamping groove 4192 on the top of the insertion plate 420, so that the insertion plate 420 can be locked.

[0035] Further, the moving assembly comprises lead screws 4211 rotatably connected to the top of the support frame 428 through bearings, one end of one lead screw 4211 is connected with a motor 422 on the side surface of the support frame 428, one end of the two lead screws 4211 is connected with a second gear 423 on the side surface of the support frame 428, a synchronous belt 424 is connected between the two second gears 423, the top of the lead screw 4211 is threadedly connected with a moving frame 425, the inside of the moving frame 425 is provided with an insertion slot 4271, wherein the insertion plate 420 is insertedly connected with the insertion slot 4271, the top of the moving frame 425 is fixedly connected with a hydraulic cylinder 426, the output end of the hydraulic cylinder 426 is fixedly connected with a connecting plate 427 in the inside of the insertion slot 4271, a plurality of protrusions 4272 are welded on the bottom surface of the connecting plate 427, the protrusions 4272 are clamped in the inside of the insertion holes 4201, the motor 422 drives the lead screw 4211 to rotate, thereby driving the moving frame 425 to move, so that the insertion plate 420 can be smoothly inserted into the inside of the insertion slot 4271, and the hydraulic cylinder 426 drives the connecting plate 427 and the protrusions 4272 on the bottom to press downward, thereby locking the insertion plate 420, and automatically unfolding the sunshade cloth 429.

[0036] Further, the lifting assembly 3 comprises a rotating rod 301 rotatably connected inside the support plate 2 through a bearing, the outer wall of the rotating rod 301 is fixedly connected with a winding roller 302 in a symmetrical manner, the outer wall of the winding roller 302 is wound with a steel wire 303, the top of the support plate 2 is fixedly connected with a guide wheel 304, the outer wall of the steel wire 303 is in contact with the outer wall of the guide wheel 304, the end of the steel wire 303 is fixedly connected with the top of the lifting frame 401, the outer wall of the support plate 2 is fixedly connected with a first motor 305, the output end of the first motor 305 is fixedly connected with the rotating rod 301, the steel wire 303 outside the winding roller 302 is driven to be automatically wound by the first motor 305, so that the lifting frame 401 connected with the steel wire 303 can be lifted.

[0037] Further, the connecting plate 427 is internally provided with a cross groove, the two ends of the cloth roller 408 are cross blocks, and the cross groove of the connecting plate 427 is fixedly connected with the cross blocks of the cloth roller 408 in a clamping manner, so that the cloth roller 408 can be better clamped.

[0038] Further, the outer wall of the cloth roller 408 is wound with a sunshade cloth 429, one end of the sunshade cloth 429 is connected with the bottom of the plug plate 420 through a screw, so that the sunshade cloth 429 can be moved conveniently, and the sunshade cloth 429 can be installed and replaced conveniently.

[0039] Working principle, first, when the sunshade cloth 429 needs to be replaced, the steel wire 303 outside the winding roller 302 is wound by the first motor 305, the lifting frame 401 connected with the steel wire 303 is moved downward, at this time, the driving assembly starts to work, the second motor 409 is started, the output end of the second motor 409 penetrates the lifting frame 401 and is fixedly connected with the bottom of the rotating rod 402, the rotating rod 402 is driven to rotate by the second motor 409, the rotating rod 402 rotates to synchronously rotate the first gear 403, the first gear 403 rotates to drive the rack 404 to slide horizontally along the inner cavity wall of the two sides of the shell 405, so that the horizontal sliding of the rack 404 drives the sliding plate 406 to slide in the limiting sliding groove 4051, thereby realizing the horizontal movement of the sliding plate 406, the two ends of the old cloth roller 408 are separated from the clamping blocks 407, and the old cloth roller 408 can be removed by the worker.

[0040] After the old cloth roller 408 is taken down, the worker places the new cloth roller 408 on the top of the supporting plate 416, and then the fourth motor 413 drives the bidirectional threaded rod 412 to rotate, so that the slider 414 outside the bidirectional threaded rod 412 moves to the middle and approaches, the connecting rod 415 connected with the slider 414 drives the supporting plate 416 to lift upwards, until the supporting plate 416 is lifted to the position flush with the clamping block 407, then the second motor 409 drives the moving plate 406 and the clamping block 407 to approach the both sides of the cloth roller 408, until the both ends of the cloth roller 408 are clamped with the cross slot inside the clamping block 407, and at this time, one end of the sunshade cloth 429 wound outside the cloth roller 408 is screwed with the plug plate 420, and the worker needs to insert the both ends of the plug plate 420 into the guide slot 4191 inside, and then lock the plug plate 420 by driving the plug block inside the second electric push rod 421 to insert into the clamping slot 4192 on the top of the plug plate 420.

[0041] After the clamping installation is completed, the first motor 305 drives the steel wire 303 to be wound, the lifting frame 401 is lifted to the system default height, the first electric push rod 418 drives the moving strip plate 419 and the plug plate 420 to move forward, until the plug plate 420 is inserted into the insertion slot 4271 outside the moving frame 425, and at the same time, the connecting plate 427 and the protrusion 4272 are driven by the hydraulic cylinder 426 to move downwards, until the protrusion 4272 is inserted into the insertion hole 4201 on the top of the plug plate 420, so as to lock the plug plate 420 and the sunshade cloth 429 connected therewith, at this time, the second electric push rod 421 drives the plug block to lift upwards, and the clamping slot 4192 outside the plug plate 420 is separated.

[0042] After the plug plate 420 and the moving strip plate 419 are separated, the lead screw 4211 is driven by the motor 422 to rotate, so that the moving frame 425 connected with the lead screw 4211 is translated, so as to drive the sunshade cloth 429 to be unfolded, and the vegetable greenhouse is shaded.

[0043] The above is only a preferred embodiment of the present application, and is not intended to limit the present application in other forms. Any skilled person in the art can modify or change the above disclosed technical content to equivalent embodiments applied to other fields, but any simple modification, equivalent change and modification made on the basis of the technical essence of the present application to the above embodiments still belongs to the protection scope of the present application.

Claims

1. A shading device for a vegetable greenhouse, comprising a fixing plate (1) and a support frame (428) disposed around the perimeter of the greenhouse, wherein the top of the fixing plate (1) is symmetrically fixedly connected to a support plate (2), characterized in that: The top of the fixed plate (1) is rotatably connected to a lifting assembly (3) via a bearing, and the outer wall of the fixed plate (1) is slidably connected to a replacement assembly (4). The replacement component (4) includes a lifting frame (401) slidably connected to the outer wall of the support plate (2). The lifting frame (401) is equipped with a drive assembly inside. A housing (405) is fixedly connected to the top of the lifting frame (401). Limiting grooves (4051) are symmetrically opened at the top center of the housing (405). Moving plates (406) are slidably connected to the top surfaces of the two limiting grooves (4051). The two moving plates (406) are rotatably connected to the interior of the two moving plates (406) through bearings. A cloth roller (408) is engaged between the two moving plates (407). One end of one of the moving plates (407) is attached to the surface of the moving plate (406). A third motor (410) is installed on the surface. A mounting bracket (411) is symmetrically fixedly connected to the top center of the outer shell (405). A bidirectional threaded rod (412) is rotatably connected to the bottom of the inner cavity wall on both sides of the mounting bracket (411) through a bearing. A slider (414) is threaded onto both ends of the bidirectional threaded rod (412). A support plate (416) is slidably connected to the top of the inner cavity wall on both sides of the mounting bracket (411). A connecting rod (415) is connected between the bottom center of the support plate (416) and the surface of the slider (414) through a rotating shaft. A snap-fit ​​assembly is fixedly connected to the outer wall of the moving plate (406). A moving assembly is provided on the top of the support frame (428).

2. The vegetable greenhouse shading device according to claim 1, characterized in that: The drive assembly includes a rotating rod (402) rotatably connected inside the lifting frame (401) via bearings. The top of the rotating rod (402) is connected to a first gear (403) inside the outer shell (405). The first gear (403) is connected to racks (404) on both sides of the first gear (403) and the inner walls of the outer shell (405) on both sides respectively. The bottom sides of the two moving plates (406) pass through corresponding limiting grooves (4051) and are fixedly connected to the corresponding racks (404). The sides of the racks (404) are slidably connected to the inner walls of the outer shell (405). The bottom of the lifting frame (401) is fixedly connected to a second motor (409). The output end of the second motor (409) passes through the lifting frame (401) and is fixedly connected to the bottom of the rotating rod (402).

3. The vegetable greenhouse shading device according to claim 1, characterized in that: The outer wall of the mounting bracket (411) is fixedly connected to a fourth motor (413), and the output end of the fourth motor (413) penetrates the mounting bracket (411) and is fixedly connected to the outer wall of the bidirectional threaded rod (412).

4. The vegetable greenhouse shading device according to claim 1, characterized in that: The snap-fit ​​assembly includes a first electric push rod (418) fixedly connected to the outer wall of the movable plate (406). A movable strip (419) is fixedly connected to the output end of the first electric push rod (418). A guide groove (4191) is fixedly connected to one side of the outer wall of the movable strip (419). An insert plate (420) is slidably connected inside the guide groove (4191). Slots (4192) are symmetrically formed on both sides of the top of the insert plate (420). The top of the 0) has several insertion holes (4201). The top of the movable strip (419) is equipped with a second electric push rod (421) at the corresponding position of the guide groove (4191). The output end of the second electric push rod (421) is fixedly connected to an insertion block inside the movable strip (419). The inside of the guide groove (4191) is connected to the inside of the movable strip (419). The shape of the insertion block matches the shape and size of the top slot (4192) of the insertion plate (420).

5. A shading device for a vegetable greenhouse according to claim 1, characterized in that: The moving assembly includes lead screws (4211) symmetrically rotatably connected to the top of a support frame (428) via bearings. One end of one lead screw (4211) is connected to a motor (422) on the side of the support frame (428). One end of both lead screws (4211) is connected to a second gear (423) on the side of the support frame (428). A synchronous belt (424) connects the two second gears (423). The top of each lead screw (4211) is threadedly connected to a moving frame (425). The movable frame (425) has a slot (4271) inside, in which the insert plate (420) is inserted and connected to the slot (4271). A hydraulic cylinder (426) is fixedly connected to the top of the movable frame (425). A connecting plate (427) is fixedly connected to the output end of the hydraulic cylinder (426) inside the slot (4271). Several protrusions (4272) are welded to the bottom surface of the connecting plate (427), and the protrusions (4272) are engaged with the inside of the insertion hole (4201).

6. A shading device for a vegetable greenhouse according to claim 1, characterized in that: The lifting assembly (3) includes a rotating rod (301) rotatably connected to the support plate (2) via a bearing. A winding roller (302) is symmetrically fixed to the outer wall of the rotating rod (301). A steel rope (303) is wound around the outer wall of the winding roller (302). A guide wheel (304) is fixedly connected to the top of the support plate (2). The outer wall of the steel rope (303) is in contact with the outer wall of the guide wheel (304). The end of the steel rope (303) is fixedly connected to the top of the lifting frame (401). A first motor (305) is fixedly connected to the outer wall of the support plate (2). The output end of the first motor (305) is fixedly connected to the rotating rod (301).

7. A shading device for a vegetable greenhouse according to claim 5, characterized in that: The connecting plate (427) has a cross groove inside, and the two ends of the cloth roller (408) are cross blocks. The cross groove of the connecting plate (427) and the cross blocks of the cloth roller (408) are engaged and fixedly connected.

8. A shading device for a vegetable greenhouse according to claim 1, characterized in that: The outer wall of the cloth roller (408) is wrapped with a sunshade cloth (429), and one end of the sunshade cloth (429) is connected to the bottom of the insert plate (420) by screws.

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