CN-118304612-B - Resistance adjusting method for fan blade

Abstract

A method for regulating resistance of fan blade includes fixing a fan blade seat on a rotary shaft, sleeving a sliding seat on said rotary shaft and setting multiple fan blades around said rotary shaft, driving said rotary shaft to rotate by external force to make said fan blades rotate synchronously in a fluid around said rotary shaft to obtain a rotary resistance, driving said sliding seat to move in axial direction by an regulating force, swinging said fan blade by using a pivoted end as pivot point to change an opening and closing angle between said fan blade and said rotary shaft to change a turning radius of said fan blade along with said opening and closing angle, and further changing the magnitude of said rotary resistance. Therefore, the opening and closing degree of the fan blade can be adjusted, and the rotation resistance can be adjusted steplessly.

Inventors

• XU ZHIYONG

Assignees

• 许智勇

Dates

Publication Date

20260505

Application Date

20240329

Priority Date

20230426

Claims (10)

1. 1. A method for adjusting resistance of a fan blade, comprising: fixing a fan blade seat on a rotating shaft extending along an axial direction, so that the fan blade seat rotates along with the rotation of the rotating shaft; A sliding seat is sleeved on the rotating shaft in a sliding way along the axial direction, and a plurality of fan blades are arranged around the rotating shaft together, so that a pivoting end of each fan blade is pivoted on the fan blade seat, and a pivoting part of each fan blade is pivoted on the sliding seat through a plurality of connecting pieces respectively; The rotating shaft is driven to rotate by external force, so that the fan blades synchronously rotate in a fluid around the rotating shaft to obtain a rotating resistance; the sliding seat is driven to move in the axial direction by an adjusting force, the fan blade swings by taking the pivoting end as a fulcrum, and an opening and closing angle between a datum line of the fan blade and an axis of the rotating shaft is changed, so that a turning radius of the fan blade is changed along with the opening and closing angle, and the rotating resistance is further changed; The turning radius is a vertical distance from the outermost edge of a free end of the fan blade, which is far away from the pivoting end, on the reference line to the axis, and each fan blade extends along the reference line between the pivoting end and the free end.
2. 2. The method of claim 1, wherein each blade comprises a blade and a blade connecting member, the blade is fixed to one end of the blade connecting member, the other end of the blade connecting member is pivotally connected to the blade holder, and the pivot portion is located on the blade connecting member.
3. 3. The method of claim 2, wherein the pin joint portion is a first through hole, a second through hole is formed in each connecting piece, a plurality of screws respectively pass through the first through hole and the second through hole to pin-joint each connecting piece to the pin joint portion, and the diameter of the second through hole is larger than the outer diameter of the screws.
4. 4. The method of claim 1, wherein the fluid is a gas.
5. 5. The method of claim 1, wherein the rotating shaft, the blade holder, the blade and the sliding holder are disposed in the coating member, and the rotating shaft is rotatably fixed to the coating member, wherein the coating member contains the fluid, and the fluid is a gas or a liquid.
6. 6. The method of claim 5, wherein the sliding seat extends out of the covering member, a cap is disposed at an end of the sliding seat away from the blade seat, a bearing is disposed between the cap and the sliding seat, a receiving groove is concavely disposed in the covering member corresponding to the cap, and the cap enters or leaves the receiving groove when the sliding seat moves in the axial direction.
7. 7. The method of claim 1, wherein the force-applying member is coupled to the shaft via a force-applying member to rotate the shaft, and the adjusting member is coupled to the sliding base via an adjusting member to receive the adjusting force.
8. 8. The method of claim 7, wherein the adjustment transmitting member has a plurality of connection points connected to the sliding base, the connection points surrounding the rotation shaft and being coupled to a base frame of the rotation shaft, and having at least one through hole for the adjustment transmitting member to pass through.
9. 9. The method of claim 8, wherein an elastic member is disposed on a side of the sliding seat away from the blade seat, one end of the elastic member abuts against the base frame, the other end of the elastic member abuts against the sliding seat, the sliding seat and the base frame compress the elastic member when the adjusting force drives the sliding seat to move away from the blade seat in the axial direction, the elastic member stores a first elastic potential energy, and the elastic member releases the first elastic potential energy when the adjusting force is removed or applied reversely, the elastic member drives the sliding seat to move in the axial direction to reset or approach the blade seat.
10. 10. The method of claim 7, wherein the force-transmitting member is fixedly wound around a drum, and has a scroll spring coupled to the drum and the shaft, wherein the force-transmitting member rotates the scroll spring when the force is applied to the shaft, the scroll spring stores a second elastic potential energy, and the scroll spring releases the second elastic potential energy when the force is removed, and the scroll spring rotates the drum idle with respect to the shaft to return the force-transmitting member.

Description

Resistance adjusting method for fan blade Technical Field The present invention relates to a method for adjusting resistance of a fan blade, and more particularly, to a method for adjusting resistance of a fan blade in a fitness apparatus. Background The rowing machine is a common fitness equipment, and generally adopts the matching of the fan blade and the pull rope, and when an operator pulls the pull rope, the pull rope drives the fan blade to rotate, so that the fan blade beats fluids such as air or water, and the like, thereby providing resistance. Specific structures include, for example, a water tank for a rowing machine, which is provided with a propeller structure in chinese patent publication No. CN 217448885U. The water oar structure comprises paddles and a shaft body for driving the paddles to synchronously rotate, wherein a paddle angle adjusting mechanism is arranged between each paddle and the shaft body, and the paddle angle adjusting mechanism realizes the change of water resistance when the paddles synchronously rotate through the adjustment of the angles of the paddles. The taiwan patent publication No. TWM594479 provides a water resistance rowing exercise machine, which comprises a frame body, a water resistor, fan blades, a pull belt and a seat, wherein the fan blades in the above patent can be additionally arranged along a mandrel to lift resistance, and the number of the fan blades is increased on the premise that the length of a water storage barrel does not exceed the length of a seat rod, so that the resistance to be lifted is prevented from being increased to increase the whole width, and the effects of lifting the resistance and not increasing occupied space are achieved. In terms of adjustment of resistance, the CN217448885U patent adjusts the inclination angle of the fan blades, the taiwan TWM594479 patent adjusts the number of the fan blades, both patents cannot adjust the opening and closing degree of the fan blades, and the resistance adjustment of both patents is limited. Disclosure of Invention Therefore, an object of the present invention is to provide a method for adjusting resistance of fan blades. The invention provides a resistance adjusting method of fan blades, which is characterized by comprising the following steps: fixing a fan blade seat on a rotating shaft extending along an axial direction, so that the fan blade seat rotates along with the rotation of the rotating shaft; A sliding seat is sleeved on the rotating shaft in a sliding way along the axial direction, and a plurality of fan blades are arranged around the rotating shaft together, so that a pivoting end of each fan blade is pivoted on the fan blade seat, and a pivoting part of each fan blade is pivoted on the sliding seat through a plurality of connecting pieces respectively; The rotating shaft is driven to rotate by external force, so that the fan blades synchronously rotate in a fluid around the rotating shaft to obtain a rotating resistance; the sliding seat is driven to move in the axial direction by an adjusting force, the fan blade swings by taking the pivoting end as a fulcrum, and an opening and closing angle between a datum line of the fan blade and an axis of the rotating shaft is changed, so that a turning radius of the fan blade is changed along with the opening and closing angle, and the rotating resistance is further changed; The turning radius is a vertical distance from the outermost edge of a free end of the fan blade, which is far away from the pivoting end, on the reference line to the axis, and each fan blade extends along the reference line between the pivoting end and the free end. Further, each fan blade comprises a blade and a blade connecting piece, the blade is fixed at one end of the blade connecting piece, the other end of the blade connecting piece is pivoted to the fan blade seat, and the pivoting part is positioned on the blade connecting piece. Further, the pivot portion is a first through hole, each connecting piece is provided with a second through hole, and a plurality of screw pieces penetrate through the first through hole and the second through hole respectively to pivot each connecting piece to the pivot portion, and the diameter of the second through hole is substantially larger than the outer diameter of each screw piece. Wherein the fluid is a gas. Further, a covering member is provided, the rotating shaft, the fan blade seat, the fan blade and the sliding seat are all arranged in the covering member, the rotating shaft is rotatably fixed on the covering member, the fluid is contained in the covering member, and the fluid is a gas or a liquid. The sliding seat extends out of the cladding piece, a cap body is arranged at one end, far away from the fan blade seat, of the sliding seat, a bearing is arranged between the cap body and the sliding seat, the cladding piece is concavely provided with a containing groove corresponding to the cap body, and when the slidin