Rope traction mechanism and push-pull window with same

Abstract

The invention relates to a rope traction mechanism and a push-pull window using the rope traction mechanism, wherein the rope traction mechanism comprises a first tensioning wheel and a second tensioning wheel, a steering wheel and a rope. The outer peripheral wall of each tensioning wheel is provided with at least two annular grooves which are spaced from each other. The two tensioning wheels areadjacent to and spaced from each other in the same row. Rotating shafts of the tensioning wheels are parallel to each other. At least one tensioning wheel is driven by an externally-connected power to rotate. The steering wheel is away from the first and the second tensioning wheels. The rope enters a wire inlet end of the first tensioning wheel, starts from the steering wheel, extends past the first annular groove of the first tensioning wheel in a direction adjacent to the first tensioning wheel, and then goes past the first annular groove of the second tensioning wheel and finally back tothe second annular groove of the first tensioning wheel, thereby forming a complete winding circle. The winding of the rope continues, and then at least one subsequent winding circle is formed. Finally, the rope comes out of a wire outlet end of the first or the second tensioning wheel and is wound back to the steering wheel to be from head-end connection with the wire inlet end.

Description

technical field [0001] The invention relates to a rope traction mechanism, in particular to a rope traction mechanism using a rope as traction power, and a sliding window using the rope traction mechanism. Background technique [0002] In human life and production, friction is everywhere. According to its nature, friction can be divided into three types: sliding friction, static friction and rolling friction. Among them, the sliding friction is equal to the multiplication of the dynamic friction coefficient and the normal pressure, that is [0003] f=u×N [0004] Among them, u is the coefficient of dynamic friction, and N is the normal pressure; the coefficient of dynamic friction is determined by the roughness of the contact surface between two objects with interaction friction. [0005] Mechanics tells us that when a rope wrapped around a pile slides, the friction can reach an extreme degree. The more turns of the rope, the greater the friction. The law of friction fo...

AI Technical Summary

Problems solved by technology

[0015] For the second see attached Figure 17 As shown, unlike the first type of rope traction mechanism in which the rope adopts a "closed-loop" structure, the rope 201 will not move up and down along the axis of rotation of the reel 202, but the reel 202 itself will be connected to the external power mechanism. Driven by 204, it moves upward or downward along the axial direction of the rotating shaft; its specific structure is: the winding wheel 202 is a hollow tubular structure, and is sleeved outside a rotating shaft 207 with external threads, the upper end of the rotating shaft 207 is fixed, and the winding wheel 202 The inner wall of the inner wall is shaped on the internal thread that cooperates with the external thread on the rotating shaft 207, see the attached Figure 18 As shown; the lower end of the reel 202 is connected with the output end of the rotating shaft of the external power mechanism 204, and the external power mechanism 204 drives the reel 202 to rotate. The disadvantage of the rope traction mechanism of this structure is also obvious, the reel will move up or down along the rotating shaft during the working process, which requires a large space to install the reel; and the rope and the winding The friction force between the outer peripheral walls of the wheels will also have the same problem as the first rope traction mechanism with a "closed loop" structure.

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