PO film unwinding speed control structure

Abstract

The utility model provides a PO film unwinding speed control structure, and belongs to the technical field of PO films. The PO film unwinding speed control structure comprises a film roll, supports are arranged at the two ends of the film roll, a rotating shaft is fixedly connected to the film roll, the rotating shaft is rotationally connected with the supports, a transmission piece and a friction piece are arranged on the rotating shaft, a control rod is movably connected to the supports, and the control rod is movably connected with the transmission piece and the friction piece. The control rod has the advantages that the control rod can be connected with the transmission part to control the film roll to rotate, unwinding and winding are achieved, the control rod can be disconnected with the transmission part and then connected with the friction part during unwinding, the unwinding speed of the film roll is controlled through friction between the control rod and the rotating shaft, and controllable rapid unwinding is achieved.

Description

Technical Field

[0001] This application relates to the technical field of PO films, and more particularly, to a structure for controlling the unwinding speed of a PO film. Background Art

[0002] A PO film is a new type of agricultural film with many excellent properties. It has high transparency, allowing more sunlight to pass through, providing sufficient light for crops and promoting photosynthesis. The PO film has high tensile strength, is not easily damaged, and has good wind and impact resistance. Its heat preservation performance is also very good, which can effectively maintain the temperature in the greenhouse at night, reduce heat loss, and create a suitable growth environment for crops.

[0003] In the prior art, the PO film roll is set at the top of the greenhouse, and the film roll is driven to rotate by manually rotating the control rod, so as to realize the functions of unwinding and winding. When unwinding, if manual driving is used, the unwinding speed is too slow and laborious. If the film roll rotates freely, due to the gravity of the film and the inertia of the film roll, the unwinding speed is too fast or even out of control, and the film will wrinkle, affecting the laying effect of the film. Summary of the Utility Model

[0004] To make up for the above deficiencies, this application provides a structure for controlling the unwinding speed of a PO film, aiming to improve the problems mentioned in the above background art.

[0005] An embodiment of this application provides a structure for controlling the unwinding speed of a PO film, including a film roll. Brackets are provided at both ends of the film roll. A rotating shaft is fixedly connected to the film roll, and the rotating shaft is rotatably connected to the brackets. A transmission member and a friction member are provided on the rotating shaft, and a control rod is movably connected to the brackets. The control rod is movably connected to the transmission member and the friction member respectively.

[0006] In a specific implementation, the transmission member includes a driven gear and a main gear. The driven gear is fixedly connected to the rotating shaft, the main gear is fixedly connected to the control rod, and the main gear meshes with the driven gear.

[0007] In the above implementation process, the rotation of the control rod is used to drive the rotation of the main gear and the driven gear, and then drive the rotation of the rotating shaft. During winding and unwinding, both can be operated through the control rod, and the winding and unwinding speed is controlled by the rotation speed of the control rod.

[0008] In a specific implementation, the transmission member further includes a spring, and the spring is movably pressed against the main gear.

[0009] In a specific implementation, gaskets are movably attached to both ends of the spring respectively.

[0010] In the above implementation process, the spring can push the main gear to engage with the slave gear. When the control rod rotates, the upper and lower gaskets slide with the main gear and the bracket respectively, thereby reducing the torsion of the spring during rotation.

[0011] In a specific embodiment, the friction member includes a support rod, the support rod is fixedly connected to the bracket, two arc-shaped plates are hinged on the support rod, and the arc-shaped plates are frictionally connected to the outer circle of the rotating shaft.

[0012] In the above implementation process, the upper ends of the two arc plates are connected to the support rod. When the two arc plates deflect inward, they can brake the rotating shaft, thereby controlling the rotation speed of the rotating shaft and further controlling the unwinding speed.

[0013] In a specific embodiment, the friction member further includes a swivel seat, which is rotatably connected to the control rod, and a connecting plate is hinged at the lower end of each support rod, and two connecting plates are respectively hinged to two ends of the swivel seat.

[0014] In the above implementation process, when the control rod is pulled downward, the spring will be compressed first, and then the two arc plates will be pulled inward through the two connecting plates to achieve the braking effect.

[0015] In a specific embodiment, a crank is provided at the lower end of the control rod.

[0016] In the above implementation, the crank facilitates the person below to turn the control rod.

[0017] In a specific embodiment, a coupling is provided on the control rod.

[0018] In the above implementation process, the coupling is used to store the control rod. The film roll is generally set on the top of the greenhouse, so the control rod will sag at the entrance of the greenhouse, affecting the passage. By setting the cross coupling, the control rod can be tilted to one side and then hung on one side of the greenhouse, which can alleviate the blocking situation.

[0019] Compared with the prior art, the beneficial effects of the present application are: the control rod can be connected to the transmission member to control the rotation of the film roll to achieve unwinding and rewinding; it can also be disconnected from the transmission member and connected to the friction member during unwinding, and the friction with the rotating shaft can be used to control the unwinding speed of the film roll, thereby achieving controllable rapid unwinding. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the implementation methods of the present application, the drawings required for use in the implementation methods will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 This is a schematic diagram of a PO film unwinding speed control structure provided in an embodiment of the present application;

[0022] Figure 2 A schematic diagram of the connection relationship between the crank and the control rod provided in the embodiment of the present application;

[0023] Figure 3 A schematic diagram of the connection relationship between the transmission frame and the rotating shaft provided in the embodiment of the present application;

[0024] Figure 4 A schematic diagram of the connection relationship between the friction member and the rotating shaft provided in an embodiment of the present application.

[0025] In the figure: 10-film roll; 20-bracket; 30-rotating shaft; 40-transmission member; 41-slave gear; 42-main gear; 43-spring; 44-gasket; 50-friction member; 51-support rod; 52-arc plate; 53-connecting plate; 54-swivel seat; 60-control rod; 70-crank; 80-coupling. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0027] See also Figures 1 - 4 The present application provides a PO film unwinding speed control structure, including a film roll 10, with brackets 20 provided at both ends of the film roll 10, a rotating shaft 30 fixedly connected to the film roll 10, the rotating shaft 30 is rotatably connected to the bracket 20, a transmission member 40 and a friction member 50 are provided on the rotating shaft 30, and a control rod 60 is movably connected to the bracket 20, and the control rod 60 is movably connected to the transmission member 40 and the friction member 50 respectively. Among them, the control rod 60 can be connected to the transmission member 40 to control the rotation of the film roll 10 to achieve unwinding and rewinding, and can also be disconnected from the transmission member 40 and connected to the friction member 50 during unwinding, and the friction with the rotating shaft 30 is used to control the unwinding speed of the film roll 10, thereby achieving controllable rapid unwinding.

[0028] See also Figures 1 - 4, the transmission member 40 includes a driven gear 41 and a main gear 42. The driven gear 41 is fixedly connected to the rotating shaft 30, the main gear 42 is fixedly connected to the control rod 60, and the main gear 42 meshes with the driven gear 41. By rotating the control rod 60, the rotation of the main gear 42 and the driven gear 41 is driven, and then the rotation of the rotating shaft 30 is driven. During winding and unwinding, it can be operated through the control rod 60, and the winding and unwinding speed is controlled by the rotation speed of the control rod 60.

[0029] Please refer to Figures 1 - 4 , the transmission member 40 further includes a spring 43, and the spring 43 is movably abutted against the main gear 42. Gaskets 44 are respectively movably attached to both ends of the spring 43. The spring 43 can push the main gear 42 to mesh with the driven gear 41. When the control rod 60 rotates, the upper and lower gaskets 44 respectively slide with the main gear 42 and the bracket 20, thereby reducing the torsion of the spring 43 during rotation.

[0030] Please refer to Figures 1 - 4 , the friction member 50 includes a support rod 51, the support rod 51 is fixedly connected to the bracket 20, and two arc-shaped plates 52 are hinged on the support rod 51. The arc-shaped plates 52 are frictionally connected to the outer circle of the rotating shaft 30. The upper ends of the two arc-shaped plates 52 are joined on the support rod 51. When the two arc-shaped plates 52 deflect inward, they can brake the rotating shaft 30, thereby controlling the rotation speed of the rotating shaft 30 and further controlling the unwinding speed.

[0031] Please refer to Figures 1 - 4 , the friction member 50 further includes a swivel base 54, the swivel base 54 is rotatably connected to the control rod 60, and a connecting plate 53 is hinged to the lower end of each support rod 51. The two connecting plates 53 are respectively hinged to both ends of the swivel base 54. When the control rod 60 is pulled downward, the spring 43 will be compressed first, and then the two arc-shaped plates 52 will be pulled inward by the two connecting plates 53 to achieve the braking effect.

[0032] Please refer to Figures 1 - 4 , a crank 70 is provided at the lower end of the control rod 60. The crank 70 facilitates a person to rotate the control rod 60 below.

[0033] Please refer to Figures 1 - 4 , a coupling 80 is provided on the control rod 60. The coupling 80 is used for the storage of the control rod 60. Generally, the film roll 10 is arranged at the top of the greenhouse, so the control rod 60 will droop at the entrance of the greenhouse, affecting the passage. By setting the cross coupling 80, the control rod 60 can be tilted to one side and then hung on one side of the greenhouse, which can relieve the situation of blocking the way.

[0034] The working principle of the unwinding speed control structure of this PO film is as follows: The entire device is installed on the top of the greenhouse through a bracket. When unwinding, first rotate the control rod 60 to release a part of the PO film. As the released part increases, the control rod 60 can be pulled, causing the main gear 42 to disengage from the slave gear 41. In this way, under the action of gravity, the film roll 10 can rotate at an accelerated speed, thereby increasing the laying speed of the PO film. If the unwinding speed is too fast, continue to pull the control rod 60 to the end, and pull the two connecting plates 53 to deflect through the rotating seat 54, and then pull the arc plate 52 to move closer inward. Use the two arc plates 52 to clamp the rotating shaft 30 to achieve frictional deceleration, realizing controllable rapid unwinding. When winding, just rotate the control rod 60 in the reverse direction. In summary, the control rod 60 can be connected to the transmission part 40 to control the rotation of the film roll 10, realizing unwinding and winding. It can also be disconnected from the transmission part 40 during unwinding and instead connected to the friction part 50, and use the friction with the rotating shaft 30 to control the unwinding speed of the film roll 10, realizing controllable rapid unwinding.

[0035] The above are only examples of this application and are not used to limit the protection scope of this application. For those skilled in the art, various changes and modifications can be made to this application. Any modification, improvement, or equivalent replacement made within the spirit and principle of this application shall be included within the protection scope of this application. It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

Claims

1. A rewinding speed control structure for a PO film, characterized in that, It includes a film roll (10), brackets (20) are arranged at both ends of the film roll (10), a rotating shaft (30) is fixedly connected to the film roll (10), the rotating shaft (30) is rotatably connected to the brackets (20), a transmission member (40) and a friction member (50) are arranged on the rotating shaft (30), a control rod (60) is movably connected to the brackets (20), and the control rod (60) is movably connected to the transmission member (40) and the friction member (50) respectively.

2. The unwind speed control structure of a PO film according to claim 1, characterized in that, The transmission member (40) includes a driven gear (41) and a main gear (42), the driven gear (41) is fixedly connected to the rotating shaft (30), the main gear (42) is fixedly connected to the control rod (60), and the main gear (42) meshes with the driven gear (41).

3. The unwind speed control structure of a PO film according to claim 2, characterized in that The transmission member (40) further includes a spring (43), and the spring (43) is movably abutted against the main gear (42).

4. A PO film unwinding speed control structure according to claim 3, characterized in that, Gaskets (44) are movably attached to both ends of the spring (43) respectively.

5. The unwind speed control structure of a PO film according to claim 4, characterized in that, The friction member (50) includes a support rod (51), the support rod (51) is fixedly connected to the brackets (20), two arc-shaped plates (52) are hinged to the support rod (51), and the arc-shaped plates (52) are in frictional connection with the outer circle of the rotating shaft (30).

6. The PO film unwinding speed control structure according to claim 5, characterized in that, The friction member (50) further includes a swivel base (54), the swivel base (54) is rotatably connected to the control rod (60), a connecting plate (53) is hinged to the lower end of each support rod (51), and the two connecting plates (53) are respectively hinged to both ends of the swivel base (54).

7. The unwind speed control structure of a PO film according to claim 6, characterized in that, A crank (70) is arranged at the lower end of the control rod (60).

8. The unwind speed control structure of a PO film according to claim 7, characterized in that, A coupling (80) is arranged on the control rod (60).

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