Lens edging mechanism
Patent Information
- Application Number
- CN202522385950.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-11
- Publication Date
- 2026-10-13
- Estimated Expiration
- 2035-11-11
AI Technical Summary
[0002]在眼镜生产加工过程中，眼镜片成型后需对其边缘进行倒角处理，以去除锋利边角、提升佩戴舒适度并增强镜片美观度，目前行业内常用的眼镜片倒角设备，多采用开放式加工结构，加工时打磨组件高速运转会产生大量噪音，这些噪音不仅会对操作人员听力造成损害，还会干扰周边工作环境，导致操作舒适性大幅下降，且现有设备夹持机构适配性差，无法稳定夹持不同尺寸的眼镜片，易造成镜片损坏或划伤，且角度调节不便，难以满足眼镜片全方位倒角需求，加工效率与精度较，因此，需要设计一种眼镜片倒角机构来解决上述问题
1、本实用新型中，通过隔音组件与L形支撑板的配合，隔音组件的外箱壳固定在L形支撑板前端，外箱壳内壁与箱门内壁的吸音材料能吸收打磨机设备工作产生的噪音，有效降低噪音污染，同时外箱壳可防止碎屑飞溅，为操作人员提供安全安静的工作环境，解决了现有设备噪音污染与安全隐患的问题。
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Figure CN224847029U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of spectacle lens processing equipment, and in particular to a spectacle lens chamfering mechanism. Background Technology
[0002] In the eyeglass manufacturing process, after the lenses are formed, their edges need to be chamfered to remove sharp corners, improve wearing comfort, and enhance the aesthetics of the lenses. Currently, most lens chamfering equipment used in the industry adopts an open processing structure. During processing, the high-speed operation of the grinding components generates a lot of noise. This noise not only damages the hearing of operators but also interferes with the surrounding working environment, resulting in a significant decrease in operational comfort. Furthermore, the existing equipment's clamping mechanism has poor adaptability and cannot stably clamp lenses of different sizes, easily causing lens damage or scratches. In addition, the angle adjustment is inconvenient and cannot meet the all-round chamfering requirements of eyeglass lenses, resulting in low processing efficiency and precision. Therefore, it is necessary to design a lens chamfering mechanism to solve the above problems. Utility Model Content
[0003] The main objective of this invention is to provide a beveling mechanism for eyeglass lenses, which can effectively solve the problems in the prior art.
[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A beveling mechanism for eyeglass lenses includes an L-shaped support plate. The upper front end of the L-shaped support plate has a second groove. The rear left and right groove walls of the second groove are fixedly connected to a limit rod. The upper right end of the L-shaped support plate has a first groove. The left groove wall of the first groove is fixedly connected to a pushing device. The middle rear end of the L-shaped support plate is fixedly connected to a clamping device. The front end of the L-shaped support plate is fixedly connected to a sound insulation component around its perimeter. The sound insulation component includes an outer shell, with doors mounted on the left and right front ends of the outer shell via hinges. Each door has a handle fixedly connected to its front end. Sound-absorbing material is fixedly connected to the inner wall of the outer shell and the inner wall of the door. The outer shell is fixedly connected to the front end of an L-shaped support plate. The pushing device includes cylinder one and cylinder two. The output end of cylinder one passes through an L-shaped support plate and is fixedly connected to a displacement plate. A through-hole limiting groove is opened at the rear left end of the displacement plate, and a sliding groove is opened at the front upper end of the displacement plate. The output end of cylinder two passes through the displacement plate and is fixedly connected to a sliding block. Cylinder one is fixedly connected to the left groove wall of groove one, and cylinder two is fixedly connected to the front end of the displacement plate. An installation groove is opened at the upper end of the sliding block, and cylinder three is fixedly connected to the lower groove wall of the installation groove. The output end of cylinder three passes through the sliding block and is fixedly connected to a mounting shell. A grinder is rotatably connected to the lower end of the mounting shell. The device includes a power supply box 1 fixedly connected to the left end of the sliding block, a mounting groove located within the sliding groove 1, a clamping device including a drive motor, the output end of the drive motor passing through an L-shaped support plate and fixedly connected to a gear 1, a gear 2 meshing with the upper outer surface of the gear 1, a rotating rod fixedly connected to the front end of the gear 2, a connecting plate fixedly connected to the front end of the rotating rod, a through sliding groove 2 being opened at both the upper end and the front end of the connecting plate, a clamping plate 2 fixedly connected to the right wall of the sliding groove 2, a power supply box 2 fixedly connected to the left front end of the connecting plate, and the drive motor fixedly connected to the middle of the rear end of the L-shaped support plate.
[0005] Preferably, a cylinder four is fixedly connected to the left end of the connecting plate, and the output end of the cylinder four passes through the connecting plate and is fixedly connected to a clamping plate one. Clamping blocks are fixedly connected to the opposite surfaces of clamping plate one and clamping plate two, and multiple rubber strips are fixedly connected to the opposite surfaces of the two clamping blocks.
[0006] Preferably, the plurality of rubber strips are linearly and equidistantly distributed along the length of clamping plate one and clamping plate two. The clamping plate one and the clamping block have the same structure and are symmetrically distributed from left to right. The clamping plate one slides along the length of the sliding groove two.
[0007] Preferably, the front end of the rotating rod is movably connected to the rear seat wall of the L-shaped support plate via a bearing, and the front part of the outer surface of the rotating rod is rotatably connected to the front end of the L-shaped support plate.
[0008] Preferably, the positional dimensions of the limiting groove are adapted to the positional dimensions of the limiting rod, and the displacement plate slides along the length of the second groove.
[0009] Preferably, the power supply box one is electrically connected to cylinder one, cylinder two and cylinder three through internal wiring, and supplies power and controls the three. The power supply box two is electrically connected to cylinder four and drive motor through internal wiring, and supplies power and controls the two.
[0010] Compared with the prior art, the present invention has the following beneficial effects: 1. In this utility model, by cooperating with the sound insulation component and the L-shaped support plate, the outer shell of the sound insulation component is fixed to the front end of the L-shaped support plate. The sound-absorbing material on the inner wall of the outer shell and the inner wall of the door can absorb the noise generated by the grinding machine, effectively reducing noise pollution. At the same time, the outer shell can prevent debris from flying, providing a safe and quiet working environment for the operator, and solving the problems of noise pollution and safety hazards of existing equipment.
[0011] 2. In this utility model, through the cooperation of the clamping device and the pushing device, the cylinder four of the clamping device pushes the clamping plate one to slide along the slide groove two, cooperates with the clamping plate two, and firmly clamps the eyeglass lenses of different sizes through the rubber strip on the clamping block. The drive motor drives the gear transmission to adjust the angle of the connecting plate. The three cylinders of the pushing device work together to adjust the position and height of the grinding machine, so as to achieve precise chamfering and adapt to the processing needs of eyeglass lenses of different sizes. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the overall structure of a beveling mechanism for eyeglass lenses according to the present invention; Figure 2 This is a schematic diagram of the sound insulation component structure of a beveling mechanism for eyeglass lenses according to this utility model; Figure 3 This is a schematic diagram of the pushing device structure of the eyeglass lens chamfering mechanism of this utility model; Figure 4 This is a schematic diagram of the clamping device structure of the eyeglass lens chamfering mechanism of this utility model; Figure 5 This is a detailed enlarged structural diagram of section A of the eyeglass lens chamfering mechanism of this utility model.
[0013] In the diagram: 1. L-shaped support plate; 2. Sound insulation component; 3. Groove 1; 4. Pushing device; 5. Clamping device; 6. Groove 2; 7. Limiting rod; 21. Outer shell; 22. Box door; 23. Box handle; 24. Sound-absorbing material; 41. Cylinder 1; 42. Displacement plate; 43. Limiting groove; 44. Cylinder 2; 45. Slide groove 1; 46. Sliding block; 47. Mounting groove; 48. Cylinder 3; 49. Power box 1; 410. Mounting shell; 411. Grinding machine equipment; 51. Drive motor; 52. Gear 1; 53. Rotating rod; 54. Gear 2; 55. Connecting plate; 56. Power box 2; 57. Slide groove 2; 58. Cylinder 4; 59. Clamping plate 1; 510. Clamping block; 511. Rubber strip; 512. Clamping plate 2. Detailed Implementation
[0014] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.
[0015] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0016] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0017] Please see Figure 1-5 This utility model provides a technical solution: A lens beveling mechanism, such as Figure 1-5 As shown, it includes an L-shaped support plate 1, with a groove 2 6 at the upper front end of the L-shaped support plate 1. The rear left and right groove walls of the groove 2 6 are fixedly connected to a limit rod 7. The upper right end of the L-shaped support plate 1 has a groove 1 3. The left groove wall of the groove 1 3 is fixedly connected to a pushing device 4. The middle rear end of the L-shaped support plate 1 is fixedly connected to a clamping device 5. The front end of the L-shaped support plate 1 is fixedly connected to a sound insulation component 2 around its perimeter. The sound insulation component 2 includes an outer shell 21. The front left and front right sides of the outer shell 21 are both fitted with doors 22 via hinges. The front ends of the doors 22 are fixedly connected with handles 23. The inner walls of the outer shell 21 and the inner walls of the doors 22 are both fixedly connected with sound-absorbing material 24. The outer shell 21 is fixedly connected to the front end of the L-shaped support plate 1.
[0018] Through the above solution: For the sound insulation component 2, its outer shell 21 is fixed to the front end of the L-shaped support plate 1. The left and right sides of the front end are connected by hinged doors 22, which are matched with the front fixed handle 23, making it convenient for operators to open the doors 22 to place or take out the eyeglass lenses. The sound-absorbing material 24 fixed to the inner wall of the outer shell 21 and the inner wall of the door 22 can absorb the noise generated by the grinding machine 411 during the beveling process of the eyeglass lenses, effectively reducing the impact of noise on the surrounding environment and operators, providing a quiet working environment for the beveling of eyeglass lenses, improving operating comfort. At the same time, the outer shell 21 can also prevent the flying of debris generated during the processing, playing a protective role and ensuring the safety of operators.
[0019] Please see Figure 3 The pushing device 4 includes a first cylinder 41 and a second cylinder 44. The output end of the first cylinder 41 passes through the L-shaped support plate 1 and is fixedly connected to a displacement plate 42. A through limiting groove 43 is opened at the rear left end of the displacement plate 42, and a sliding groove 45 is opened at the front upper end of the displacement plate 42. The output end of the second cylinder 44 passes through the displacement plate 42 and is fixedly connected to a sliding block 46. The first cylinder 41 is fixedly connected to the left groove wall of the first groove 3, and the second cylinder 44 is fixedly connected to the front end of the displacement plate 42. An installation groove 47 is opened at the upper end of the sliding block 46, and the lower groove wall of the installation groove 47 is fixedly connected to... A cylinder 48 is connected to a sliding block 46, and the output end of the cylinder 48 passes through the sliding block 46 and is fixedly connected to a mounting shell 410. The lower end of the mounting shell 410 is rotatably connected to a grinding machine 411. The left end of the sliding block 46 is fixedly connected to a power supply box 49. The mounting groove 47 is located in the sliding groove 45. The position and size of the limiting groove 43 are adapted to the position and size of the limiting rod 7. The displacement plate 42 slides along the length of the groove 6. The power supply box 49 is electrically connected to the cylinder 41, the cylinder 44, and the cylinder 48 through internal wiring, and provides power and control to the three.
[0020] Through the above scheme: For the pushing device 4, the power supply box 49 supplies power to cylinders 41, 44, and 48 through internal wiring and controls their operation. Cylinder 41 is fixed to the left wall of groove 3, and its output end passes through the displacement plate 42 fixed to the L-shaped support plate 1, which can push the displacement plate 42 to slide along the length of groove 6. The limiting groove 43 passing through the rear left end of the displacement plate 42 is matched with the position and size of the limiting rod 7, which can ensure that the displacement plate 42 is stable and does not deviate when sliding. Cylinder 44 is fixed to the front end of the displacement plate 42, and its output end passes through the sliding block 46 fixed to the displacement plate 42, which can push the sliding block 46 along the length of groove 6. The slide groove 45 at the front of the upper end of the plate 42 slides, and the cylinder 48 fixed to the lower wall of the mounting groove 47 at the upper end of the sliding block 46 has its output end passing through the mounting shell 410 fixed to the sliding block 46, which can drive the grinding machine 411 connected to the lower end to move up and down. Through the coordinated action of cylinder 41, cylinder 44, and cylinder 48, the horizontal position and height of the grinding machine 411 can be flexibly adjusted, so that the grinding machine 411 can be accurately moved to the corresponding position of the lens to be chamfered, which can meet the processing of lenses of different sizes and different chamfering requirements, improve the accuracy and flexibility of chamfering processing, and ensure the chamfering quality of the lens.
[0021] Please see Figure 4 and Figure 5 The clamping device 5 includes a drive motor 51. The output end of the drive motor 51 passes through the L-shaped support plate 1 and is fixedly connected to a gear 52. A gear 54 is meshed with the upper part of the outer surface of the gear 52. A rotating rod 53 is inserted and fixedly connected to the front end of the gear 54. A connecting plate 55 is fixedly connected to the front end of the rotating rod 53. A through groove 57 is opened at both the upper end and the front end of the connecting plate 55. A clamping plate 512 is fixedly connected to the right wall of the groove 57. A power supply box 56 is fixedly connected to the left front end of the connecting plate 55. The drive motor 51 is fixedly connected to the middle of the rear end of the L-shaped support plate 1. A cylinder 58 is fixedly connected to the left end of the connecting plate 55. The output end of the cylinder 58 passes through the connecting plate 55 and is fixedly connected to the gear 58. A clamping plate 59 is connected to the clamping plate 59. Clamping blocks 510 are fixedly connected to the opposite surfaces of clamping plate 59 and clamping plate 512. Multiple rubber strips 511 are fixedly connected to the opposite surfaces of the two clamping blocks 510. The multiple rubber strips 511 are linearly and equidistantly distributed along the length of clamping plate 59 and clamping plate 512. Clamping plate 59 and clamping blocks 510 have the same structure and are symmetrically distributed from left to right. Clamping plate 59 slides along the length of sliding groove 57. The front end of rotating rod 53 is movably connected to the rear seat wall of L-shaped support plate 1 through a bearing. The front part of the outer surface of rotating rod 53 is rotatably connected to the front end of L-shaped support plate 1. Power supply box 56 is electrically connected to cylinder 58 and drive motor 51 through internal wiring, and provides power and control to both.
[0022] Through the above scheme: For the clamping device 5, the power supply box 2 56 supplies power to the cylinder 4 58 and the drive motor 51 through internal wiring and controls their operation. The drive motor 51 is fixed to the middle of the rear end of the L-shaped support plate 1. The output end passes through the gear 1 52 fixed to the L-shaped support plate 1 and meshes with the gear 2 54. The front end of the gear 2 54 passes through the fixed rotating rod 53 and the front end of the fixed connecting plate 55. The front end of the rotating rod 53 is movably connected to the rear seat wall of the L-shaped support plate 1 through a bearing, and the front end of the outer surface is rotatably connected to the front end of the L-shaped support plate 1. When the drive motor 51 starts, it can drive the rotating rod 53 to rotate stably, thereby adjusting the angle of the connecting plate 55 and the clamped lens. The output end of the cylinder 4 58 fixed to the left end of the connecting plate 55 passes through the clamping plate 1 59 fixed to the connecting plate 55, which can push the clamping plate 1 59 along the sliding groove that connects the upper end and the front end of the connecting plate 55. The sliding groove 57 engages with the clamping plate 512 fixed to the right wall of the sliding groove 57. The clamping block 510 fixed to the opposite face of the clamping plate 59 and the clamping plate 512, and the multiple rubber strips 511 fixed to the opposite face of the clamping block 510, which are linearly and equidistantly distributed along the length of the clamping plate 59 and the clamping plate 512, can firmly clamp the spectacle lens. The clamping plate 59 and the clamping block 510 have the same structure and are symmetrical from left to right, which can ensure uniform force during clamping and avoid damage to the spectacle lens due to improper clamping. The rubber strips 511 can also increase the friction with the spectacle lens, prevent the spectacle lens from sliding during processing, and protect the surface of the spectacle lens from being scratched. The drive motor 51 drives the connecting plate 55 and the spectacle lens to adjust the angle, which allows the grinding machine equipment 411 to perform chamfering processing on different positions of the spectacle lens, meet the all-round chamfering requirements of the spectacle lens, and improve processing efficiency and processing quality.
[0023] It should be noted that this utility model is a lens beveling mechanism. When this lens beveling mechanism is in operation, firstly, by grasping the handle 23 on the outer casing 21 of the soundproofing component 2, the hinged door 22 is opened, and the lens to be beveling is placed on the connecting plate 55 of the clamping device 5. At this time, the power supply box 2 56 controls the cylinder 4 58 to start through its internal circuitry. The output end of the cylinder 4 58 pushes the clamping plate 1 59 to slide along the sliding groove 2 57 on the connecting plate 55, so that the clamping plate 1 59 engages with the clamping block 510 on the opposite side of the clamping plate 2 512, thus facilitating the beveling process. Multiple linearly and equidistantly distributed rubber strips 511 on clamping block 510 securely hold the spectacle lens. Clamping plate 59 and clamping block 510 have identical structures and are symmetrical. Then, power supply box 56 controls the start of drive motor 51. The output of drive motor 51 drives gear 52 to rotate. Gear 52 meshes with gear 54, causing gear 54 to drive rotating rod 53. The front end of rotating rod 53 is movably connected to the rear wall of L-shaped support plate 1 via a bearing. The front end of its outer surface is rotatably connected to the front end of L-shaped support plate 1. Rotating rod 53 then drives connecting plate 5... 5. After adjusting the clamped spectacle lens to a suitable processing angle, the power supply box 49 controls the cylinder 41 in the push device 4 through its internal circuitry. The cylinder 41 is fixed to the left wall of the groove 3, and its output end pushes the displacement plate 42 along the sliding groove 6. The limiting groove 43 on the displacement plate 42 is matched with the limiting rod 7 to ensure stable sliding. The limiting rod 7 is fixed to the rear of the left and right groove walls of the groove 6. At the same time, the power supply box 49 controls the cylinder 44 to start. The cylinder 44 is fixed to the front end of the displacement plate 42, and its output end pushes the sliding block 46 along the sliding groove 1. 45 Slide to adjust the horizontal position of the polishing machine 411. Then, the power box 49 controls the cylinder 48 to start. The cylinder 48 is fixed in the lower wall of the mounting groove 47, which is located in the slide groove 45. Its output end pushes the mounting shell 410 and the polishing machine 411 connected to the lower end to contact the lens for chamfering. During the process, the sound-absorbing material 24 on the inner wall of the outer shell 21 and the inner wall of the door 22 plays a sound insulation role. The entire mechanism is supported and installed by the L-shaped support plate 1 to complete the chamfering operation of the lens.
[0024] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A beveling mechanism for spectacle lenses, characterized in that: The L-shaped support plate (1) has a groove 2 (6) at the upper front end. The rear left and right groove walls of the groove 2 (6) are fixedly connected to a limit rod (7). The upper right end of the L-shaped support plate (1) has a groove 1 (3). The left groove wall of the groove 1 (3) is fixedly connected to a pushing device (4). The middle rear end of the L-shaped support plate (1) is fixedly connected to a clamping device (5). The front end of the L-shaped support plate (1) is fixedly connected to a sound insulation component (2) around its perimeter. The sound insulation component (2) includes an outer shell (21), and the front left and front right sides of the outer shell (21) are both fitted with doors (22) by hinges. The front ends of the doors (22) are all fixedly connected with handles (23). The inner walls of the outer shell (21) and the inner walls of the doors (22) are both fixedly connected with sound-absorbing materials (24). The outer shell (21) is fixedly connected to the front end of the L-shaped support plate (1). The pushing device (4) includes cylinder one (41) and cylinder two (44). The output end of cylinder one (41) passes through the L-shaped support plate (1) and is fixedly connected to a displacement plate (42). A limiting groove (43) is opened through the rear left end of the displacement plate (42). A sliding groove (45) is opened at the front upper end of the displacement plate (42). The output end of cylinder two (44) passes through the displacement plate (42) and is fixedly connected to a sliding block (46). Cylinder one (41) is fixedly connected to the left groove wall of groove one (3). Cylinder two (44) is fixedly connected to the front end of the displacement plate (42). An installation groove (47) is opened at the upper end of the sliding block (46). Cylinder three (48) is fixedly connected to the lower groove wall of the installation groove (47). The output end of cylinder three (48) passes through the sliding block (46) and is fixedly connected to an installation shell (410). A rotatable jack is rotatably connected to the lower end of the installation shell (410). The mill equipment (411) has a power supply box (49) fixedly connected to the left end of the sliding block (46), the mounting groove (47) is located in the sliding groove (45), the clamping device (5) includes a drive motor (51), the output end of the drive motor (51) passes through the L-shaped support plate (1) and is fixedly connected to a gear (52), the upper part of the outer surface of the gear (52) is meshed with a gear (54), the front end of the gear (54) is inserted and fixedly connected to a rotating rod (53), the front end of the rotating rod (53) is fixedly connected to a connecting plate (55), the upper end and the front end of the connecting plate (55) are both opened with a through sliding groove (57), the right groove wall of the sliding groove (57) is fixedly connected to a clamping plate (512), the left part of the front end of the connecting plate (55) is fixedly connected to a power supply box (56), and the drive motor (51) is fixedly connected to the middle of the rear end of the L-shaped support plate (1).
2. The spectacle lens chamfering mechanism according to claim 1, characterized in that: A cylinder four (58) is fixedly connected to the left end of the connecting plate (55). The output end of the cylinder four (58) passes through the connecting plate (55) and is fixedly connected to a clamping plate one (59). Clamping blocks (510) are fixedly connected to the opposite surfaces of clamping plate one (59) and clamping plate two (512). Multiple rubber strips (511) are fixedly connected to the opposite surfaces of the two clamping blocks (510).
3. The spectacle lens chamfering mechanism according to claim 2, characterized in that: Multiple rubber strips (511) are linearly and equidistantly distributed along the length of clamping plate one (59) and clamping plate two (512). The clamping plate one (59) and clamping block (510) have the same structure and are symmetrically distributed from left to right. The clamping plate one (59) slides along the length of the sliding groove two (57).
4. The spectacle lens chamfering mechanism according to claim 1, characterized in that: The front end of the rotating rod (53) is movably connected to the rear seat wall of the L-shaped support plate (1) via a bearing, and the front part of the outer surface of the rotating rod (53) is rotatably connected to the front end of the L-shaped support plate (1).
5. The spectacle lens chamfering mechanism according to claim 1, characterized in that: The position dimensions of the limiting groove (43) are adapted to the position dimensions of the limiting rod (7), and the displacement plate (42) slides along the length of the second groove (6).
6. The spectacle lens chamfering mechanism according to claim 1, characterized in that: The power supply box one (49) is electrically connected to cylinder one (41), cylinder two (44) and cylinder three (48) respectively through internal circuits, and provides power and control to the three. The power supply box two (56) is electrically connected to cylinder four (58) and drive motor (51) respectively through internal circuits, and provides power and control to the two.