Energy-saving diesel generating set

Abstract

The invention relates to the technical field of diesel generators, in particular to an energy-saving diesel generator set which comprises a mounting frame, a diesel generator set body is fixedly mounted on the mounting frame, an oil filling pipe is fixedly connected to the diesel generator set body in a penetrating mode, and a flaring oil filling mechanism is arranged on the inner wall of the oil filling pipe in a sliding fit mode. An adjusting frame is arranged on the diesel generating set and located on one side of the oil filling pipe, an oil tank cover is rotatably connected to the adjusting frame, a movable frame is arranged on the mounting frame in a sliding fit mode, and two photovoltaic panels are rotatably connected to the movable frame. The problems that a traditional oil filling port is small and oil filling is inconvenient are solved, the oil filling efficiency, safety and environmental protection performance of the diesel generating set can be effectively improved, the diesel engine and a new energy (solar energy) driving mode are combined, new energy can provide auxiliary power when the load is low, the workload of the diesel engine is reduced, and therefore fuel is saved.

Description

Technical Field

[0001] The present invention relates to the technical field of diesel generators, and in particular to an energy-saving diesel generator set. Background Art

[0002] Energy-saving diesel generator sets are power generation equipment that utilize optimized design and advanced technologies to reduce fuel consumption, minimize emissions, and improve energy efficiency. They are widely used in industrial, commercial, and emergency power supply applications. With the continuous development of new energy technologies, an increasing number of novel energy drive systems are being incorporated into power generation equipment. These systems often combine renewable energy sources such as solar, wind, and hydrogen to further reduce reliance on traditional fossil fuels, thereby achieving more environmentally friendly and energy-efficient power generation.

[0003] The document with the prior art publication number CN118481819A provides an energy-saving diesel generator set, which guides and filters the harmful smoke generated by the diesel generator set main body by setting a processing box and a filter component. After the airflow is filtered by the filter component, the hot airflow is sent into the interior of the buffer airbag, thereby replacing the external air pump air supply. By utilizing the hot airflow, the expansion speed of the gas in the airbag can be accelerated, thereby improving the buffering effect of the airbag. Using the hot airflow generated by the generator set as the inflation source of the airbag can avoid additional energy consumption. Compared with using an external air pump to inflate the airbag with normal temperature gas, using the hot airflow to inflate the airbag does not require additional electricity or fuel, so it has better energy-saving and environmental protection effects.

[0004] During the use of existing diesel generator sets, it is necessary to open the fuel tank cap and pour diesel into it. However, due to the small size of the fuel inlet in the existing technology, diesel is easily spilled during refueling, causing inconvenience during refueling. Additional accessories (such as a funnel) may be required to help refuel, thus affecting efficiency.

[0005] In summary, the prior art lacks a technology for refueling by expanding the refueling port of a diesel generator set. Summary of the Invention

[0006] The purpose of the present invention is to solve the shortcomings of the background technology and to propose an energy-saving diesel generator set.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is: an energy-saving diesel generator set, including a mounting frame, a diesel generator set is fixedly installed on the mounting frame, a refueling pipe is fixedly connected through the diesel generator set, a flared refueling mechanism is slidingly provided on the inner wall of the refueling pipe, an adjustment frame is provided on one side of the refueling pipe of the diesel generator set, a fuel tank cap is rotatably connected to the adjustment frame, a movable frame is slidably provided on the mounting frame, and two photovoltaic panels are rotatably connected to the movable frame.

[0008] Preferably, a slide groove is provided on the inner wall of one side of the refueling pipe, a threaded rod is rotatably connected in the slide groove, a universal joint is fixedly connected to the top of the threaded rod, the other end of the universal joint is rotatably connected to the inner wall of the slide groove, a transmission wheel is fixedly connected to the outer end of the universal joint, and a sliding frame is threadedly connected to the outer wall of the threaded rod.

[0009] Preferably, the flaring refueling mechanism includes an adjusting seat, which is slidably fitted with the inner wall of the refueling pipe, one side of the adjusting seat is fixedly connected to the sliding frame, a rubber sleeve is fixedly connected to the top of the adjusting seat, a plurality of stretching rods are rotatably connected to the adjusting seat, one side of the stretching rod is fixedly connected to the outer wall of the rubber sleeve, and an adjusting wheel is fixedly connected to the bottom end of the stretching rod.

[0010] Preferably, an adjusting ring is provided on the inner wall of the adjusting seat for sliding cooperation, a plurality of springs are fixedly connected to the lower surface of the adjusting ring, the other end of the spring is fixedly connected to the inner wall of the adjusting seat, a plurality of contact rods are fixedly provided on the top surface of the adjusting ring, the contact rods are slidingly fitted through the inner wall of the adjusting seat, the outer ends of the contact rods are movably contacted with the inner wall of the refueling pipe, a plurality of adjusting racks are fixedly provided on the top surface of the adjusting ring, the adjusting racks are slidingly fitted through the inner wall of the adjusting seat, and the outer ends of the adjusting racks are meshed with the adjusting wheel for transmission.

[0011] Preferably, one end of the adjustment frame is fixedly connected to an electric push rod, the other end of the electric push rod is fixedly connected to the diesel generator set, and one side of the electric push rod is fixedly connected to a guide rod.

[0012] Preferably, the inner wall of the bottom end of the fuel tank cover is adapted to the outer wall of the top end of the fuel filling pipe, a reversing sleeve is fixedly connected to one end of the fuel tank cover, the reversing sleeve is rotatably connected to the adjusting frame, a reversing groove is provided on the outer wall of the reversing sleeve, and the inner wall of the reversing groove is slidingly matched with the outer wall of the guide rod.

[0013] Preferably, a sleeve rod is slidingly provided on the inner wall of the bottom end of the reversing sleeve, the bottom end of the sleeve rod is rotatably connected to the diesel generator set, and a transmission gear disc is fixedly connected to the outer wall of the bottom end of the sleeve rod, and the transmission gear disc is meshed with the transmission wheel for transmission.

[0014] Preferably, a worm is rotatably connected to one end of the movable frame, a transmission rod is fixedly connected to the bottom end of the worm, a threaded sleeve is slidingly fitted on the outer wall of the bottom end of the transmission rod, the bottom end of the threaded sleeve is rotatably connected to the inner wall of the mounting frame, a motor is fixedly connected to the bottom end of the threaded sleeve, the motor is fixedly connected to the inner wall of the mounting frame, a connecting block is threadedly connected to the outer wall of the threaded sleeve, and the connecting block is fixedly connected to the movable frame.

[0015] Preferably, a rotating shaft is fixedly connected through the photovoltaic panel, the rotating shaft is rotatably connected to the movable frame, a gear is fixedly connected to one end of the rotating shaft, the two gears are meshed with each other for transmission, and a worm wheel is fixedly connected to one end of one of the rotating shafts, and the worm wheel is meshed with the worm for transmission.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. By setting up an expansion refueling mechanism, when the diesel generator set needs to be refueled, the rubber sleeve can be moved out of the fuel tank port. At the same time, under the action of multiple stretching rods, the top of the rubber sleeve can be stretched and expanded, thereby increasing the refueling range. When pouring diesel from the oil barrel into the diesel generator set tank, refueling is smoother, avoiding the problems of small and inconvenient refueling in traditional refueling ports, and avoiding the need for auxiliary tools (such as funnels) during operation, which can effectively improve the efficiency, safety and environmental protection of refueling of diesel generator sets;

[0018] 2. The adjustment bracket automatically moves the fuel tank cap upward and rotates open. Simultaneously, the flared refueling mechanism is automatically moved out and retracted as the cap opens and closes. This improves operational convenience, fueling efficiency, safety, sealing, energy waste, and equipment life. It not only enhances user experience but also reduces environmental pollution and equipment maintenance costs, complying with modern trends in equipment automation and energy conservation and environmental protection.

[0019] 3. By setting up photovoltaic panels, when the diesel generator set is used outdoors, the movable frame can be used to drive the photovoltaic panels upward and at the same time drive the two photovoltaic panels to a suitable angle, so that the energy-saving diesel generator set adopts hybrid technology, combining the diesel engine with new energy (solar energy) drive mode. The new energy can provide auxiliary power when the load is low, reduce the workload of the diesel engine, and thus save fuel. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of an energy-saving diesel generator set of the present invention when in use;

[0021] Figure 2 This is a partial cross-sectional schematic diagram of a structure of an energy-saving diesel generator set according to the present invention;

[0022] Figure 3 This is a schematic cross-sectional view of the fuel pipe structure of an energy-saving diesel generator set of the present invention;

[0023] Figure 4 This is a partial cross-sectional expanded schematic diagram of the structure of the flared refueling mechanism of an energy-saving diesel generator set of the present invention;

[0024] Figure 5 This is a schematic diagram of the structure of an adjustment frame and other components of an energy-saving diesel generator set of the present invention;

[0025] Figure 6 This is a schematic structural diagram of a fuel tank cover of an energy-saving diesel generator set according to the present invention;

[0026] Figure 7 This is a schematic diagram of the movable frame structure of an energy-saving diesel generator set of the present invention;

[0027] Figure 8 This is a schematic diagram of the photovoltaic panel structure of an energy-saving diesel generator set of the present invention.

[0028] The following are marked in the figure: 1. Mounting frame; 2. Diesel generator set; 3. Fueling pipe; 4. Flared refueling mechanism; 5. Adjusting frame; 6. Fuel tank cap; 7. Movable frame; 8. Photovoltaic panel; 301. Threaded rod; 302. Universal joint; 303. Transmission wheel; 304. Sliding frame; 305. Slide groove; 401. Adjusting seat; 402. Rubber sleeve; 403. Tension rod; 404. Adjusting wheel; 405. Adjusting ring; 406. Spring; 407. Contact rod; 408. Adjusting rack; 501. Electric push rod; 502. Guide rod; 601. Reversing sleeve; 602. Reversing groove; 603. Sleeve rod; 604. Transmission gear disc; 701. Worm; 702. Transmission rod; 703. Threaded sleeve; 704. Motor; 705. Connecting block; 801. Rotating shaft; 802. Gear; 803. Worm gear. DETAILED DESCRIPTION

[0029] The following description is intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are merely examples, and those skilled in the art may conceive of other obvious variations.

[0030] like Figures 1-8An energy-saving diesel generator set shown includes a mounting frame 1, on which a diesel generator set 2 is fixedly mounted, a refueling pipe 3 is fixedly connected through the diesel generator set 2, and a flared refueling mechanism 4 is slidingly provided on the inner wall of the refueling pipe 3, an adjusting frame 5 is provided on one side of the refueling pipe 3 of the diesel generator set 2, a fuel tank cover 6 is rotatably connected to the adjusting frame 5, a movable frame 7 is slidably provided on the mounting frame 1, and two photovoltaic panels 8 are rotatably connected to the movable frame 7.

[0031] like Figure 3 As shown, a slot 305 is formed on the inner wall of one side of the refueling pipe 3. A threaded rod 301 is rotatably connected to the slot 305. A universal joint 302 is fixedly connected to the top of the threaded rod 301. The other end of the universal joint 302 extends through the inner wall of the slot 305 and is rotatably connected. A transmission wheel 303 is fixedly connected to the outer end of the universal joint 302. A sliding bracket 304 is threadedly connected to the outer wall of the threaded rod 301. When the reversing sleeve 601 rotates, it drives the transmission gear plate 604 connected to the sleeve rod 603 to rotate. The transmission gear plate 604 then drives the universal joint 302 connected to the transmission wheel 303 to rotate. This causes the universal joint 302 to rotate the threaded rod 301 connected to the sleeve rod 603. The threaded rod 301 then drives the adjustment seat 401 connected to the sliding bracket 304 to move upward.

[0032] like Figure 4 As shown, the flaring refueling mechanism 4 includes an adjusting seat 401, which is slidably fitted with the inner wall of the refueling pipe 3, one side of the adjusting seat 401 is fixedly connected to the sliding frame 304, a rubber sleeve 402 is fixedly connected to the top of the adjusting seat 401, and a plurality of stretching rods 403 are rotatably connected on the adjusting seat 401, one side of the stretching rod 403 is fixedly connected to the outer wall of the rubber sleeve 402, and an adjusting wheel 404 is fixedly connected to the bottom end of the stretching rod 403.

[0033] An adjustment ring 405 is slidably mounted on the inner wall of the adjustment seat 401. Multiple springs 406 are fixedly mounted on the lower surface of the adjustment ring 405, with the other ends of the springs 406 fixedly mounted on the inner wall of the adjustment seat 401. Multiple contact rods 407 are fixedly mounted on the top surface of the adjustment ring 405. The contact rods 407 extend through the inner wall of the adjustment seat 401 and slidably engage with the outer ends of the contact rods 407. The outer ends of the contact rods 407 are movably mounted on the inner wall of the fuel filler pipe 3. Multiple adjustment racks 408 are fixedly mounted on the top surface of the adjustment ring 405. The adjustment racks 408 extend through the inner wall of the adjustment seat 401 and slidably engage with the outer ends of the adjustment racks 408. When the contact rods 407 contact the inner wall of the adjustment seat 401, they drive the connected adjustment ring 405 downward. At this point, the adjustment ring 405, via the connected adjustment racks 408, drives the adjustment wheel 404 to rotate. This in turn drives the connected stretching rod 403 to rotate, allowing the stretching rod 403 to stretch and expand the rubber sleeve 402.

[0034] By setting up the flared refueling mechanism 4, when the diesel generator set 2 needs to be refueled, the rubber sleeve 402 can be moved out of the fuel tank port. At the same time, under the action of multiple stretching rods 403, the top end of the rubber sleeve 402 can be stretched and expanded, thereby increasing the refueling range. When pouring the diesel in the oil barrel into the fuel tank of the diesel generator set 2, refueling is smoother, avoiding the problems of small refueling ports and inconvenience in refueling in traditional methods, and avoiding the need to use auxiliary tools such as funnels during operation, which can effectively improve the efficiency, safety and environmental protection of refueling the diesel generator set 2.

[0035] like Figure 5 As shown, one end of the adjustment frame 5 is fixedly connected to an electric push rod 501, and the other end of the electric push rod 501 is fixedly connected to the diesel generator set 2. A guide rod 502 is fixedly connected to one side of the electric push rod 501. The electric push rod 501 is used to drive the adjustment frame 5 to move upward. At this time, the adjustment frame 5 will drive the fuel tank cover 6 to move upward and open. At the same time, under the action of the guide rod 502, the reversing sleeve 601 with a reversing groove 602 will be driven to rotate, so that the reversing sleeve 601 can drive the fuel tank cover 6 to rotate to one side.

[0036] like Figure 6 As shown, the inner wall of the bottom end of the fuel tank cover 6 is adapted to the outer wall of the top end of the refueling pipe 3, and a reversing sleeve 601 is fixedly connected to one end of the fuel tank cover 6. The reversing sleeve 601 is rotatably connected to the adjusting frame 5, and a reversing groove 602 is provided on the outer wall of the reversing sleeve 601. The inner wall of the reversing groove 602 is slidably matched with the outer wall of the guide rod 502.

[0037] A sleeve rod 603 is slidingly provided on the inner wall of the bottom end of the reversing sleeve 601. The bottom end of the sleeve rod 603 is rotatably connected to the diesel generator set 2. A transmission gear disc 604 is fixedly connected to the outer wall of the bottom end of the sleeve rod 603. The transmission gear disc 604 is meshed with the transmission wheel 303 for transmission.

[0038] like Figure 7 As shown, a worm 701 is rotatably connected to one end of the movable frame 7, a transmission rod 702 is fixedly connected to the bottom end of the worm 701, a threaded sleeve 703 is slidingly fitted on the outer wall of the bottom end of the transmission rod 702, the bottom end of the threaded sleeve 703 is rotatably connected to the inner wall of the mounting frame 1, a motor 704 is fixedly connected to the bottom end of the threaded sleeve 703, the motor 704 is fixedly connected to the inner wall of the mounting frame 1, a connecting block 705 is threadedly connected to the outer wall of the threaded sleeve 703, and the connecting block 705 is fixedly connected to the movable frame 7.

[0039] like Figure 8As shown, a rotating shaft 801 is fixedly connected to the photovoltaic panel 8, and the rotating shaft 801 is rotatably connected to the movable frame 7. A gear 802 is fixedly connected to one end of the rotating shaft 801, and the two gears 802 are meshed and driven. A worm gear 803 is fixedly connected to one end of one of the rotating shafts 801, and the worm gear 803 is meshed and driven with the worm 701. The motor 704 drives the connected threaded sleeve 703 to rotate, and the threaded sleeve 703 drives the movable frame 7 connected to the threaded sleeve 703 to move upward. At the same time, the rotating threaded sleeve 703 drives the worm 701 connected to the transmission rod 702 to rotate, so that the worm 701 can drive the worm gear 803 to rotate, so that the worm gear 803 can drive the photovoltaic panel 8 connected to the rotating shaft 801 to rotate. At the same time, the gear 802 on the rotating shaft 801 drives the photovoltaic panel 8 connected to the other gear 802 to rotate.

[0040] Working principle: When the diesel generator set 2 is used outdoors, the motor 704 is first used to drive the connected threaded sleeve 703 to rotate. At this time, the threaded sleeve 703 will drive the movable frame 7 connected to the threaded sleeve 703 to move upward. At the same time, the rotating threaded sleeve 703 will drive the worm 701 connected to the transmission rod 702 to rotate, so that the worm 701 can drive the worm gear 803 to rotate, so that the worm gear 803 can drive the photovoltaic panel 8 connected to the rotating shaft 801 to rotate. At the same time, the gear 802 on the rotating shaft 801 will drive the photovoltaic panel 8 connected to the other gear 802 to rotate, so that the two photovoltaic panels 8 are at a suitable angle;

[0041] Then, when the diesel in the oil barrel needs to be added to the fuel tank of the diesel generator set 2, the electric push rod 501 is used to drive the adjusting frame 5 to move upward. At this time, the adjusting frame 5 will drive the fuel tank cover 6 to move upward and open. At the same time, under the action of the guide rod 502, the reversing sleeve 601 with the reversing groove 602 will be driven to rotate, so that the reversing sleeve 601 can drive the fuel tank cover 6 to rotate to one side;

[0042] When the reversing sleeve 601 rotates, it drives the transmission gear plate 604 connected to the sleeve rod 603 to rotate, and then the transmission gear plate 604 drives the universal joint 302 connected to the transmission wheel 303 to rotate, so that the universal joint 302 drives the connected threaded rod 301 to rotate, and then the threaded rod 301 drives the adjustment seat 401 connected to the sliding frame 304 to move upward, so that the rubber sleeve 402 moves out of the fuel pipe 3;

[0043] When the contact rod 407 contacts the inner wall of the adjustment seat 401, it will drive the connected adjustment ring 405 to move downward. At this time, the adjustment ring 405 will drive the adjustment wheel 404 to rotate through the connected adjustment rack 408, so that the adjustment wheel 404 drives the connected stretching rod 403 to rotate, so that the stretching rod 403 can stretch and expand the rubber sleeve 402 to facilitate refueling.

[0044] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0045] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions merely illustrate the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. An energy-saving diesel generator set, comprising a mounting frame (1), characterized in that: A diesel generator set (2) is fixedly mounted on the mounting frame (1), a refueling pipe (3) is fixedly connected and penetrates the diesel generator set (2), an expanding refueling mechanism (4) is slidably provided on the inner wall of the refueling pipe (3), an adjusting frame (5) is provided on one side of the refueling pipe (3) on the diesel generator set (2), a fuel tank cover (6) is rotatably connected to the adjusting frame (5), a movable frame (7) is slidably provided on the mounting frame (1), and two photovoltaic panels (8) are rotatably provided on the movable frame (7).

2. An energy-saving diesel generator set according to claim 1, characterized in that: A sliding groove (305) is provided on the inner wall of one side of the refueling pipe (3), a threaded rod (301) is rotatably connected to the inner wall of the sliding groove (305), a universal joint (302) is fixedly connected to the top of the threaded rod (301), the other end of the universal joint (302) is rotatably connected to the inner wall of the sliding groove (305), a transmission wheel (303) is fixedly connected to the outer end of the universal joint (302), and a sliding frame (304) is threadedly connected to the outer wall of the threaded rod (301).

3. An energy-saving diesel generator set according to claim 2, characterized in that: The flaring refueling mechanism (4) comprises an adjusting seat (401), the adjusting seat (401) being slidably matched with the inner wall of the refueling pipe (3), one side of the adjusting seat (401) being fixedly connected to the sliding frame (304), the top end of the adjusting seat (401) being fixedly connected to a rubber sleeve (402), a plurality of stretching rods (403) being rotatably connected to the adjusting seat (401), one side of the stretching rods (403) being fixedly connected to the outer wall of the rubber sleeve (402), and the bottom end of the stretching rods (403) being fixedly connected to an adjusting wheel (404).

4. An energy-saving diesel generator set according to claim 3, characterized in that: The inner wall of the adjusting seat (401) is provided with an adjusting ring (405) in a sliding manner, and a plurality of springs (406) are fixedly connected to the lower surface of the adjusting ring (405), and the other end of the spring (406) is fixedly connected to the inner wall of the adjusting seat (401). A plurality of contact rods (407) are fixedly connected to the top surface of the adjusting ring (405), and the contact rods (407) are provided in a sliding manner through the inner wall of the adjusting seat (401). The outer ends of the contact rods (407) are provided in a movable contact manner with the inner wall of the refueling pipe (3). A plurality of adjusting racks (408) are fixedly connected to the top surface of the adjusting ring (405), and the adjusting racks (408) are provided in a sliding manner through the inner wall of the adjusting seat (401). The outer ends of the adjusting racks (408) are provided in a meshing transmission manner with the adjusting wheel (404).

5. An energy-saving diesel generator set according to claim 4, characterized in that: One end of the regulating frame (5) is fixedly connected to an electric push rod (501), the other end of the electric push rod (501) is fixedly connected to the diesel generator set (2), and one side of the electric push rod (501) is fixedly connected to a guide rod (502).

6. An energy-saving diesel generator set according to claim 5, characterized in that: The inner wall of the bottom end of the fuel tank cover (6) is adapted to the outer wall of the top end of the refueling pipe (3); a reversing sleeve (601) is fixedly connected to one end of the fuel tank cover (6); the reversing sleeve (601) is rotatably connected to the adjustment frame (5); a reversing groove (602) is provided on the outer wall of the reversing sleeve (601); and the inner wall of the reversing groove (602) is slidably matched with the outer wall of the guide rod (502).

7. An energy-saving diesel generator set according to claim 6, characterized in that: The inner wall of the bottom end of the reversing sleeve (601) is provided with a sleeve rod (603) in a sliding manner, and the bottom end of the sleeve rod (603) is rotatably connected to the diesel generator set (2). The outer wall of the bottom end of the sleeve rod (603) is fixedly connected to a transmission gear disc (604), and the transmission gear disc (604) is meshed with the transmission wheel (303) for transmission.

8. The energy-saving diesel generator set according to claim 7, characterized in that: One end of the movable frame (7) is rotatably connected to a worm (701), the bottom end of the worm (701) is fixedly connected to a transmission rod (702), the outer wall of the bottom end of the transmission rod (702) is slidably matched with a threaded sleeve (703), the bottom end of the threaded sleeve (703) is rotatably connected to the inner wall of the mounting frame (1), the bottom end of the threaded sleeve (703) is fixedly connected to a motor (704), the motor (704) is fixedly connected to the inner wall of the mounting frame (1), the outer wall of the threaded sleeve (703) is threadedly connected to a connecting block (705), and the connecting block (705) is fixedly connected to the movable frame (7).

9. An energy-saving diesel generator set according to claim 8, characterized in that: A rotating shaft (801) is fixedly connected to and penetrates the photovoltaic panel (8), and the rotating shaft (801) is rotatably connected to the movable frame (7). A gear (802) is fixedly connected to one end of the rotating shaft (801), and the two gears (802) are meshed and transmitted with each other. A worm wheel (803) is fixedly connected to one end of one of the rotating shafts (801), and the worm wheel (803) is meshed and transmitted with the worm (701).

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