Integrated device for orderly harvesting asparagus lettuce

Abstract

The utility model relates to the technical field of asparagus lettuce harvesting, in particular to an asparagus lettuce orderly harvesting integrated device which comprises a collecting module and a limiting module, the collecting module can collect asparagus lettuce and comprises a supporting frame, two guide rails are fixedly connected to the top face of the supporting frame, a connecting plate is arranged at the top of the supporting frame, and the limiting module is arranged on the connecting plate. And the bottom surface of the connecting plate is fixedly connected with a sliding seat which is in sliding connection with the adjacent guide rail. According to the asparagus lettuce collecting device, the top face of the connecting plate is rotationally connected with the collecting box, asparagus lettuces can fall into the collecting box through the limiting module, then the collecting box can intermittently move horizontally along the guide rail, and therefore the asparagus lettuces are tidily stacked in the collecting box and located on one side of the partition plate; when the asparagus lettuce collecting box is used, the collecting box can rotate on the connecting plate, the collecting box is turned around, at the moment, the asparagus lettuces can be stacked on the other side of the partition plate, and therefore the asparagus lettuces are orderly harvested and integrated in the collecting box.

Description

TECHNICAL FIELD

[0001] The utility model relates to the art of lettuce harvesting technology, in particular to a kind of lettuce orderly harvesting integrated device. BACKGROUND

[0002] Lettuce is also known as lettuce, a common vegetable, above-ground stem can be used for food, the existing lettuce harvesting machine in the process of harvesting lettuce, conveying structure on harvesting equipment usually will be obliquely upwards to the lettuce harvesting, but the lettuce directly falls downwards at the top of conveying structure, then the artificial loading is needed to the lettuce, the harvesting efficiency is relatively low, and the artificial cost is relatively high, the labor intensity is relatively large, it is not conducive to the rapid harvesting of lettuce harvesting machine for lettuce. SUMMARY

[0003] The utility model aims at providing a kind of lettuce orderly harvesting integrated device to solve the problems raised in the above background.

[0004] To achieve the above object, the utility model provides the following technical scheme:

[0005] A kind of lettuce orderly harvesting integrated device, including collection module, limiting module;

[0006] Collection module can collect lettuce, the collection module includes support frame, the top surface of the support frame is fixedly connected with two guide rails, the support frame top is provided with connecting plate, the bottom surface of the connecting plate is fixedly connected with the sliding seat slidably connected with adjacent guide rail, the top surface of the connecting plate is rotatably connected with collection box, the inner side of the collection box is fixedly connected with partition, both sides of the collection box are fixedly connected with two support blocks, and the collection box is matched with a plurality of pad plates;

[0007] Limiting module is arranged at one side of collection module.

[0008] Further, the bottom surface of the connecting plate is fixedly connected with adjusting box, the inner side of the adjusting box is provided with adjusting motor one, the output end of the adjusting motor one is drivingly connected with transmission shaft one rotatably connected with the inner side of the adjusting box, the side surface of the transmission shaft one is fixedly sleeved with connecting gear, and the bottom surface of one guide rail is fixedly connected with rack meshed with the connecting gear.

[0009] Further, the inner side of the adjusting box is provided with adjusting motor two, the output end of the adjusting motor two is drivingly connected with transmission shaft two rotatably connected with the inner side of the adjusting box, the side surface of the transmission shaft two is fixedly sleeved with worm, the inner side of the adjusting box is rotatably connected with transmission shaft three rotatably connected with the side surface of the connecting plate, the top end of the transmission shaft three is fixedly connected with the bottom surface of the collection box, and the side surface of the transmission shaft three is fixedly sleeved with worm gear meshed and driven with the worm.

[0010] Further in, the limiting module comprises a supporting mechanism, a limiting seat, a guide cylinder, two transmission gears, two limiting frames, and two multi-section telescopic rods.

[0011] The supporting mechanism is arranged on one side of the supporting frame.

[0012] The limiting seat is arranged on the top of the supporting mechanism, and a driving motor is arranged on the inner side of the top of the limiting seat.

[0013] The guide cylinder is rotatably connected to the inner side of the limiting seat.

[0014] The two transmission gears are fixedly sleeved on the driving shaft and the side surface of the guide cylinder respectively, and the two transmission gears are in meshing transmission.

[0015] The two limiting frames are fixedly connected to the side surface of the guide cylinder, and a sliding frame is slidably connected to the inner side of the limiting frame.

[0016] The two multi-section telescopic rods are arranged in the guide cylinder, and the side surface of the multi-section telescopic rod is fixedly connected to the side surface of the adjacent sliding frame.

[0017] Further in, the inner side of the limiting seat is fixedly connected with two fixed blocks, a connecting shaft is fixedly connected to the inner side of the fixed block, a contact block is rotatably connected to the side surface of the connecting shaft, and a torsion spring is arranged between the inner side of the contact block and the side surface of the connecting shaft.

[0018] Preferably, the supporting mechanism comprises a supporting frame, a fixed frame, a supporting seat, and a hydraulic rod.

[0019] The supporting frame is fixedly connected to the side surface of the limiting seat.

[0020] The fixed frame is slidably connected to the inner side of the supporting frame.

[0021] The supporting seat is fixedly connected to the side surface of the supporting frame, and the bottom side surface of the fixed frame is slidably connected to the inner side of the supporting seat.

[0022] The hydraulic rod is fixedly connected to the inner bottom surface of the fixed frame, and the output end of the hydraulic rod is in transmission connection with the inner top surface of the supporting frame.

[0023] Further in, the inner side of the supporting seat is rotatably connected with an adjusting screw rod which is in screw connection with the inner bottom side of the fixed frame, and a power motor is arranged in one end of the supporting seat.

[0024] Compared with the prior art, the present application has the following beneficial effects:

[0025] 1. The collecting box is rotationally connected to the top surface of the connecting plate, and after the lettuce is conveyed by the harvester, it can fall into the collecting box through the limiting module, and then the collecting box can be translated along the guide rail intermittently, so that the lettuce is neatly stacked in the collecting box on one side of the partition plate, and after the collecting box moves from one end of the guide rail to the other end, the collecting box can be rotated on the connecting plate to turn around, and at this time the lettuce can be stacked on the other side of the partition plate, so that the lettuce is orderly harvested and integrated in the collecting box.

[0026] 2. The guiding cylinder is rotationally connected to the limiting seat, and after the lettuce is conveyed by the harvester, it can fall into the collecting box through the guiding cylinder, and the multiple telescopic rods can be used to limit the falling lettuce in the collecting box to prevent the lettuce from falling over. When the collecting box moves along the guide rail, the guiding cylinder can rotate in the limiting seat, and the guiding cylinder can drive the two multiple telescopic rods to rotate through the limiting frame and the sliding frame. Due to the limiting of the abutting block, one multiple telescopic rod can translate along the abutting block, thereby continuously limiting the stacked lettuce, and at the same time, the lettuce can be pushed to make the lettuce tightly adhere to each other, and the other multiple telescopic rod can rotate around the lettuce to move to the unstacked area, so that after the new lettuce falls, the two multiple telescopic rods can continue to limit the lettuce, so that the lettuce is vertically inserted into the collecting box, which is beneficial to neatly stacking the lettuce in the collecting box. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a whole structure schematic diagram of the lettuce orderly harvesting and integrating device of the utility model;

[0028] Figure 2 is a schematic diagram of the internal structure of the collecting box in the utility model;

[0029] Figure 3 is a schematic diagram of the internal structure of the adjusting box in the utility model;

[0030] Figure 4 is a schematic diagram of the limiting module structure in the utility model;

[0031] Figure 5 is a schematic diagram of the internal structure of the limiting seat in the utility model;

[0032] Figure 6 is a schematic diagram of the guiding cylinder structure in the utility model.

[0033] In the figure: 100, collection module; 110, support frame; 111, guide rail; 112, rack; 120, connecting plate; 121, sliding seat; 130, collection box; 131, partition; 132, support block; 140, adjusting box; 141, adjusting motor one; 142, transmission shaft one; 143, connecting gear; 144, adjusting motor two; 145, transmission shaft two; 146, transmission shaft three; 147, worm; 148, worm gear; 150, pad; 200, limiting module; 210, support mechanism; 211, support frame; 212, fixed frame; 213, support seat; 214, hydraulic rod; 215, adjusting lead screw; 220, limiting seat; 221, drive motor; 222, drive shaft; 230, guide cylinder; 240, limiting frame; 241, sliding frame; 242, return spring; 250, multi-section telescopic rod; 260, fixed block; 261, abutting block; 262, connecting shaft; 270, transmission gear. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0035] Please refer to Figures 1-2 In the embodiments of the utility model, a lettuce ordered harvesting integrated device comprises a collection module 100 and a limiting module 200.

[0036] The collection module 100 can collect lettuce. The collection module 100 comprises a support frame 110, the top surface of the support frame 110 is fixedly connected with two guide rails 111, the top of the support frame 110 is provided with a connecting plate 120, the bottom surface of the connecting plate 120 is fixedly connected with a sliding seat 121 which is slidably connected with the adjacent guide rail 111, the sliding seat 121 can slide along the guide rail 111, so that the connecting plate 120 slides on the support frame 110, the top surface of the connecting plate 120 is rotatably connected with a collection box 130, the inner side surface of the collection box 130 is fixedly connected with a partition 131, both sides of the collection box 130 are fixedly connected with two support blocks 132, the collection box 130 is matched with a plurality of pad plates 150, and the limiting module 200 is arranged on one side of the collection module 100.

[0037] Specifically, after the lettuce is conveyed by the harvesting machine, the lettuce directly falls downward at the top of the conveying structure, and can fall into the collecting box 130 through the limiting module 200, then the collecting box 130 can be moved along the guide rail 111 intermittently, so that the lettuce is neatly stacked in the collecting box 130 and located on one side of the partition plate 131, after the collecting box 130 moves from one end of the guide rail 111 to the other end, the collecting box 130 can be rotated on the connecting plate 120 to turn around, and the lettuce can be stacked in the collecting box 130 and located on the other side of the partition plate 131, after a layer is stacked at the bottom, the base plate 150 can be placed in the collecting box 130, the base plate 150 is supported by the two supporting blocks 132, then the lettuce can be stacked on the base plate 150, so that the lettuce is orderly harvested and integrated in the collecting box 130, and the buffer pad can be arranged on the bottom surface of the collecting box 130 and the top surface of the base plate 150, so as to avoid that the lettuce is damaged when falling.

[0038] A plurality of supports can be arranged at the bottom of the support frame 110, the support frame 110 is supported by the supports, and the rollers can be arranged at the bottom of the supports, so as to facilitate the movement of the device.

[0039] Embodiment one

[0040] As shown in Figures 4-6 In this embodiment, the limiting module 200 includes a supporting mechanism 210, a limiting seat 220, a guide cylinder 230, two transmission gears 270, two limiting frames 240, and two multi-section telescopic rods 250.

[0041] The support mechanism 210 is arranged on one side of the support frame 110, the limiting seat 220 is arranged on the top of the support mechanism 210, the inner side of the top of the limiting seat 220 is provided with a driving motor 221, the output end of the driving motor 221 is drivingly connected with a driving shaft 222 which is rotatably connected with the inner side of the limiting seat 220, a guide cylinder 230 is rotatably connected with the inner side of the limiting seat 220, two transmission gears 270 are fixedly sleeved on the side surfaces of the driving shaft 222 and the guide cylinder 230 respectively and are in meshing transmission, two limiting frames 240 are fixedly connected with the side surface of the guide cylinder 230, the inner side of each limiting frame 240 is slidingly connected with a sliding frame 241, the inner side of each sliding frame 241 is fixedly connected with a plurality of return springs 242 which are fixedly connected with the inner side of each limiting frame 240, two multi-section telescopic rods 250 are arranged in the guide cylinder 230, the side surface of each multi-section telescopic rod 250 is fixedly connected with the side surface of the adjacent sliding frame 241, under the action of the return springs 242, the position of each sliding frame 241 can be kept, so that the position of each multi-section telescopic rod 250 can be kept, the inner side bottom of the limiting seat 220 is fixedly connected with two fixed blocks 260, the inner side of each fixed block 260 is fixedly connected with a connecting shaft 262, the side surface of the connecting shaft 262 is rotatably connected with an abutting block 261 which is in contact with the side surface of the adjacent multi-section telescopic rod 250, and a torsion spring is arranged between the inner side of the abutting block 261 and the side surface of the connecting shaft 262, under the action of the torsion spring, the angle of the abutting block 261 can be kept.

[0042] In specific implementation, after the lettuce is conveyed through the harvesting machine, the lettuce can fall into the guide cylinder 230, the bottom of the lettuce can extrude the abutting block 261, so that the abutting block 261 rotates downward, so that the lettuce can pass through the two abutting blocks 261 and fall into the collecting box 130, the abutting block 261 can play a certain buffering role on the lettuce, and after the lettuce falls into the collecting box 130, the multi-section telescopic rod 250 can limit the lettuce falling into the collecting box 130, so as to avoid the lettuce from falling over, and after the lettuce falls into the collecting box 130, the collecting box 130 can be moved along the guide rail 111 to adjust the position of the collecting box 130, at the same time, the driving motor 221 can drive the driving shaft 222 to rotate, the driving shaft 222 can drive the guide cylinder 230 to rotate through the transmission gears 270, so that the guide cylinder 230 rotates in the limiting seat 220, the guide cylinder 230 can drive the two multi-section telescopic rods 250 to rotate through the limiting frame 240 and the sliding frame 241, due to the limiting of the abutting block 261, one multi-section telescopic rod 250 can translate along the two abutting blocks 261, so that one multi-section telescopic rod 250 drives the sliding frame 241 thereon to move, so that one multi-section telescopic rod 250 gradually moves to the middle of the guide cylinder 230, and one multi-section telescopic rod 250 translates along the abutting block 261, so that one multi-section telescopic rod 250 continuously limits the stacked lettuce, at the same time, one multi-section telescopic rod 250 can push the lettuce, so that the lettuces are tightly attached to each other, which is beneficial to stacking the lettuces neatly;

[0043] Another multi-section telescopic rod 250 can rotate around the lettuce, and another multi-section telescopic rod 250 can move around the lettuce to the non-stacking area. After the guide cylinder 230 rotates one hundred and eighty degrees, the sliding frame 241 can drive one multi-section telescopic rod 250 to move to the edge of the guide cylinder 230 under the action of the reset spring 242, and one multi-section telescopic rod 250 can limit the stacked lettuce, so as to prevent the lettuce from falling. The next lettuce can continue to fall between the two multi-section telescopic rods 250, and the two multi-section telescopic rods 250 continue to limit the lettuce, so that the lettuce is vertically inserted into the collection box 130, and the lettuce is neatly stacked in the collection box 130.

[0044] As shown in Figures 2-3 In this embodiment, the connecting plate 120 is fixedly connected with the adjusting box 140 at the bottom, the adjusting motor one 141 is arranged on the inner side of the adjusting box 140, the output end of the adjusting motor one 141 is drivingly connected with the transmission shaft one 142 which is rotatably connected with the inner side of the adjusting box 140, the connecting gear 143 is fixedly sleeved on the side surface of the transmission shaft one 142, and the rack 112 is fixedly connected with the bottom surface of the guide rail 111 and engaged with the connecting gear 143.

[0045] The adjusting motor two 144 is arranged on the inner side of the adjusting box 140, the transmission shaft two 145 is drivingly connected with the output end of the adjusting motor two 144 and rotatably connected with the inner side of the adjusting box 140, the worm 147 is fixedly sleeved on the side surface of the transmission shaft two 145, the transmission shaft three 146 is rotatably connected with the side surface of the connecting plate 120 and fixedly connected with the bottom surface of the collection box 130 at the top end, the worm wheel 148 is fixedly sleeved on the side surface of the transmission shaft three 146 and engaged with the worm 147 for transmission, and the rotation of the transmission shaft three 146 can be limited by the worm 147 and the worm wheel 148, so as to limit the angle of the collection box 130.

[0046] In the embodiment, the motor 141 drives the transmission shaft 142 to rotate, the transmission shaft 142 drives the connecting gear 143 to rotate, the connecting gear 143 rolls on the rack 112, the adjusting box 140 moves in the support frame 110, the adjusting box 140 drives the connecting plate 120 to move, the connecting plate 120 and the sliding seat 121 translate along the guide rail 111, the connecting plate 120 drives the collecting box 130 to move, the position of the collecting box 130 is adjusted, the lettuce is stacked in the collecting box 130 one by one, the motor 144 drives the transmission shaft 145 to rotate, the transmission shaft 145 drives the transmission shaft 146 to rotate through the worm 147 and the worm wheel 148, the transmission shaft 146 drives the collecting box 130 to rotate, the collecting box 130 turns on the connecting plate 120, the motor 141 drives the transmission shaft 142 to rotate reversely, the collecting box 130 moves intermittently, and the other side of the partition 131 in the collecting box 130 is stacked with the lettuce.

[0047] The sensors are arranged on the top of the two ends of the guide rail 111, the movement of the collecting box 130 to the end of the guide rail 111 is detected, the angle of the collecting box 130 is adjusted through the motor 144, and the collecting box 130 moves reversely.

[0048] Embodiment two

[0049] On the basis of the embodiment one, as shown in Figure 2 and Figure 4 In the embodiment, the support mechanism 210 includes a support frame 211, a fixed frame 212, a support seat 213 and a hydraulic rod 214.

[0050] The support frame 211 is fixedly connected to the side of the limiting seat 220, the fixed frame 212 is slidably connected to the inner side of the support frame 211, the support seat 213 is fixedly connected to the side of the support frame 110, the bottom side of the fixed frame 212 is slidably connected to the inner side of the support seat 213, the hydraulic rod 214 is fixedly connected to the inner bottom of the fixed frame 212, the output end of the hydraulic rod 214 is in transmission connection with the inner top of the support frame 211, the support frame 110 supports the support seat 213, the support seat 213 supports the fixed frame 212, the fixed frame 212 supports the support frame 211 and the limiting seat 220 through the hydraulic rod 214, the adjusting lead screw 215 is rotatably connected to the inner side of the support seat 213 and is in screw connection with the bottom inner side of the fixed frame 212, the power motor is arranged in the inner end of the support seat 213, and the output end of the power motor is in transmission connection with the end of the adjusting lead screw 215.

[0051] In the embodiment, after a row of lettuce is placed, the power motor drives the adjusting screw 215 to rotate, when the adjusting screw 215 rotates, the bottom of the fixed frame 212 moves along the inside of the support base 213, so that the limiting seat 220 moves with the collecting box 130, after the limiting seat 220 and the top of the conveying structure of the harvester are staggered, the support frame 211 is driven by the hydraulic rod 214 to move upward, so that the limiting seat 220 drives the guide cylinder 230 and the multi-section telescopic rod 250 to move upward, the multi-section telescopic rod 250 is moved out of the collecting box 130, then the collecting box 130 is turned around, after the turning around of the collecting box 130 is completed, the adjusting screw 215 is reversely rotated by the power motor, and the limiting seat 220 is moved downward by the hydraulic rod 214, so that the limiting seat 220 moves to the original position, and the collecting box 130 is reversely moved, so that the end of the collecting box 130 corresponds to the top of the conveying structure of the harvester again, then the collecting box 130 is intermittently moved again, the lettuce is placed in the collecting box 130, after the pad 150 is placed in the collecting box 130, the limiting seat 220 moves downward, the multi-section telescopic rod 250 moves downward and is inserted into the collecting box 130 again, and the pad 150 can abut against the bottom of the multi-section telescopic rod 250, so that the multi-section telescopic rod 250 is retracted.

[0052] It is apparent for those skilled in the art that the present application is not limited to the details of the foregoing exemplary embodiments, and the present application can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all aspects as illustrative and not restrictive, and the scope of the present application is defined by the appended claims rather than the foregoing description, and it is intended to embrace all changes falling within the meaning and range of equivalents of the claims. Any reference signs in the claims should not be considered as limiting the claims involved.

[0053] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be combined appropriately to form other embodiments that those skilled in the art can understand.

Claims

1. An integrated device for the sequential harvesting of lettuce, characterized in that, Include: Collecting module (100) can collect lettuce, the collecting module (100) includes support frame (110), the top surface of support frame (110) is fixedly connected with two guide rails (111), the top of support frame (110) is provided with connecting plate (120), the bottom surface of connecting plate (120) is fixedly connected with the sliding seat (121) of sliding connection with adjacent guide rail (111), the top surface of connecting plate (120) is rotatably connected with collecting box (130), the inner side of collecting box (130) is fixedly connected with partition (131), both sides of collecting box (130) are fixedly connected with two support blocks (132), and collecting box (130) is matched with a plurality of pad plates (150); Limiting module (200) is arranged on one side of collecting module (100).

2. The integrated lettuce ordered harvesting apparatus according to claim 1, wherein, The bottom surface of connecting plate (120) is fixedly connected with adjusting box (140), the inner side of adjusting box (140) is provided with adjusting motor one (141), the output end of adjusting motor one (141) is drivingly connected with transmission shaft one (142) rotatably connected with the inner side of adjusting box (140), the side of transmission shaft one (142) is fixedly sleeved with connecting gear (143), and the bottom surface of one guide rail (111) is fixedly connected with rack (112) engaged with connecting gear (143).

3. The integrated lettuce order harvesting apparatus of claim 2, wherein, The inner side of adjusting box (140) is provided with adjusting motor two (144), the output end of adjusting motor two (144) is drivingly connected with transmission shaft two (145) rotatably connected with the inner side of adjusting box (140), the side of transmission shaft two (145) is fixedly sleeved with worm (147), the inner side of adjusting box (140) is rotatably connected with transmission shaft three (146) rotatably connected with the side of connecting plate (120), the top end of transmission shaft three (146) is fixedly connected with the bottom surface of collecting box (130), and the side of transmission shaft three (146) is fixedly sleeved with worm gear (148) engaged with transmission of worm (147).

4. The integrated lettuce ordered harvesting apparatus according to claim 1, wherein, The limiting module (200) comprises: Support mechanism (210) is arranged on one side of support frame (110); Limiting seat (220) is arranged on the top of support mechanism (210), the inner side of the top of limiting seat (220) is provided with drive motor (221), and the output end of drive motor (221) is drivingly connected with drive shaft (222) rotatably connected with the inner side of limiting seat (220); Guide cylinder (230) is rotatably connected on the inner side of limiting seat (220); Two transmission gears (270) are fixedly sleeved on the side of drive shaft (222) and guide cylinder (230) respectively, and the two transmission gears (270) are engaged transmission; Two limiting frames (240) are fixedly connected on the side of guide cylinder (230), the inner side of limiting frame (240) is slidably connected with sliding frame (241), and the inner side of sliding frame (241) is fixedly connected with a plurality of return springs (242) fixedly connected with the inner side of limiting frame (240). Two multi-section telescopic rods (250) are arranged inside the guide cylinder (230), and the side surfaces of the multi-section telescopic rods (250) are fixedly connected with the side surfaces of the adjacent sliding frames (241).

5. The integrated lettuce ordered harvesting apparatus according to claim 4, wherein, The inner side surface of the limiting seat (220) is fixedly connected with two fixed blocks (260), the inner side surface of the fixed block (260) is fixedly connected with a connecting shaft (262), the side surface of the connecting shaft (262) is rotatably connected with an abutting block (261) in contact with the side surface of the adjacent multi-section telescopic rod (250), and a torsion spring is arranged between the inner side surface of the abutting block (261) and the side surface of the connecting shaft (262).

6. The integrated lettuce ordered harvesting apparatus according to claim 4, wherein, The support mechanism (210) comprises: a support frame (211) fixedly connected to the side surface of the limiting seat (220); a fixed frame (212) slidably connected to the inner side surface of the support frame (211); a support seat (213) fixedly connected to the side surface of the support frame (110), the bottom side surface of the fixed frame (212) being slidably connected with the inner side surface of the support seat (213); a hydraulic rod (214) fixedly connected to the inner bottom surface of the fixed frame (212), the output end of the hydraulic rod (214) being drivingly connected with the inner top surface of the support frame (211).

7. The integrated lettuce order harvesting apparatus of claim 6, wherein, The inner side surface of the support seat (213) is rotatably connected with an adjusting screw rod (215) screw-connected with the bottom inner side surface of the fixed frame (212), the inner end of the support seat (213) is provided with a power motor, and the output end of the power motor is drivingly connected with the end portion of the adjusting screw rod (215).

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