An adjustable wind resistance fan vehicle

Abstract

The utility model discloses an adjustable resistance fan car, including frame, two groups of pedal and two groups of handle, two pedals set up in the left and right sides of frame, be used for the user treading and be driven and move by the user, two handles set up in the left and right sides of the front end of frame, its characterized in that still include wind wheel, vane, rotation axis, floating plate and rotating block, pedal linkage is in rotation axis, wind wheel linkage is in rotation axis, wind wheel can rotate with the movement of pedal, be equipped with a plurality of vane that encircles wind wheel rotation axis on wind wheel, set up the floating plate that can move up and down on vane, rotating block linkage is set up in floating plate, rotating block linkage is in wind wheel and can rotate relative to wind wheel, and rotating block is used for driving floating plate to move up and down under the operation of user, wherein, floating plate rises or falls, and wind wheel wind area correspondingly increases or reduces, thereby makes wind resistance increase or reduce.

Description

Technical Field

[0001] This utility model relates to the field of fitness equipment technology, specifically to an adjustable resistance fan cart. Background Technology

[0002] Fan bikes, as common aerobic fitness equipment, generate power by pedaling and rely on the air resistance of the fan to increase exercise intensity and achieve the effect of aerobic exercise. However, traditional fan bikes have significant shortcomings in resistance adjustment. On the one hand, relying on the user's riding speed to generate resistance makes it impossible to precisely control the exercise intensity; on the other hand, the combination of non-adjustable air resistance and adjustable magnetic resistance has a limited adjustment range and insignificant resistance changes, resulting in a poor user experience and failing to meet diverse fitness needs.

[0003] Chinese utility model patent CN222445290U discloses an adjustable-resistance fan cart. When the user steps on the pedal, the pedal movement drives the linkage plate of the impeller to rotate via a belt drive mechanism, causing the blades to revolve around the impeller's rotation axis, providing wind resistance. Simultaneously, the operating mechanism can drive the blades to rotate around their own rotation axis. The operating component drives the sliding component to slide relative to the impeller's rotation axis, and through the linkage assembly, all blades rotate simultaneously, changing the blades' frontal area and thus adjusting the wind resistance. For example, pushing the operating component (push handle) forward causes the force transmission component to drive the sliding component to move to the left, the blades rotate counterclockwise, increasing the frontal area and wind resistance; pushing the operating component in the opposite direction causes the blades to rotate clockwise, decreasing the frontal area and wind resistance. However, the connections and coordination between the various components are complex, and wear between components and loosening of connections can easily lead to malfunctions. At high speeds, if the rotation of each blade is not consistent, it can easily cause the impeller's center of gravity to shift, causing the fan cart to vibrate and affecting the product reliability. Therefore, this utility model provides a highly stable adjustable-resistance fan cart. Utility Model Content

[0004] To address the aforementioned issues, an adjustable resistance fan truck is provided. By rotating the rotating block, the windward area of ​​the blades on the impeller is increased or decreased, thereby increasing or decreasing the wind resistance. This solves the problem that increasing or decreasing wind resistance by rotating the blade angle can easily lead to inconsistent rotation angles and vibration caused by the impeller's center of gravity shifting.

[0005] To address the problems of existing technologies, this utility model provides an adjustable resistance fan cart, including a frame, two sets of pedals, and two sets of handles. The two pedals are located on the left and right sides of the frame for the user to step on and drive. The two handles are located on the left and right sides of the front end of the frame. The cart is characterized by further including a fan wheel, blades, a rotating shaft, a floating plate, and a rotating block. The pedals are linked to the rotating shaft, and the fan wheel is also linked to the rotating shaft, allowing it to rotate with the pedals. The fan wheel has several blades surrounding its rotating shaft, and floating plates that can move up and down are mounted on the blades. The rotating block is linked to the floating plates and is also linked to the fan wheel, allowing it to rotate relative to the fan wheel. The rotating block drives the floating plates to move up and down under the user's operation. As the floating plates rise or fall, the fan wheel's windward area increases or decreases accordingly, thereby increasing or decreasing wind resistance.

[0006] Preferably, the blades can be screwed onto the wind turbine, the central axes of each blade are located in the same plane, and the plane formed by the central axes of each blade is perpendicular to the rotation axis.

[0007] Preferably, the wind turbine includes a linkage plate and connecting pipes distributed on the linkage plate. The linkage plate is linked to the rotating shaft. The blades are screwed to the linkage plate through the connecting pipes. When the pedal moves, the linkage plate and the blades rotate around the rotating shaft to provide resistance to the movement. The blades can drive the floating plate to move under the rotation of the rotating block to change the windward area.

[0008] Preferably, the blade includes a connecting frame and an elastic element connected to the connecting frame, the floating plate is restricted to move radially along the linkage plate within the connecting frame, the elastic element is connected to the floating plate, and the elastic element is compressed when the floating plate moves toward the center of the linkage plate.

[0009] Preferably, the elastic element includes a connecting cylinder and a first spring. The connecting cylinder is disposed on the inner side of the connecting frame near the edge of the linkage plate. A connecting rod is disposed on one side of the floating plate. The connecting rod can restrict movement within the connecting cylinder. The first spring is sleeved on the connecting rod. The first spring can be compressed when the connecting rod moves towards the linkage plate.

[0010] Preferably, the connecting frame is provided with a sliding groove along its edge, and the floating plate is provided with a moving block along its edge. The moving block can move in the sliding groove, and the moving block is connected to the rotating block by a flexible rope. Rotating the rotating block can cause the flexible rope to extend or shorten.

[0011] Preferably, the linkage plate is provided with several first grooves evenly distributed near the center. The rotating block includes a rotating ring, a steel ball, and a second spring. One end of the rotating block can be restricted to rotate on the linkage plate. The rotating ring is provided with several second grooves on the side that contacts the linkage plate. One end of the second spring is fixed in the second groove, and the other end of the second spring is fixedly connected to the steel ball. The steel ball can enter the first groove and / or the second groove. The flexible rope is connected to the rotating ring. When the pedal moves, the rotating block can rotate with the wind turbine. When the pedal stops moving, rotating the rotating block can drive the flexible rope to wrap around or unwrap from the rotating block, thereby causing the windward area of ​​the blade to shrink or expand.

[0012] Preferably, rotating blocks are symmetrically arranged on both sides of the wind turbine, and the two rotating blocks are respectively connected to the side of the floating plate.

[0013] The advantages of this utility model compared to the prior art are:

[0014] 1. By setting a linked wind turbine on a rotating shaft, and setting several blades on the wind turbine, and then setting movable floating plates on the blades, a rotating block is set in conjunction with the floating plates. The rotating block is linked to the wind turbine and can rotate relative to the wind turbine. The rotating block is used to drive the floating plates to move up and down under the operation of the user, controlling the floating plates to rise or fall, so that the windward area of ​​the wind turbine increases or decreases accordingly, thereby increasing or decreasing the wind resistance. This achieves resistance control of the fan vehicle. The rotating block drives multiple floating plates to move synchronously, which can avoid the center of gravity of the wind turbine from shifting, thereby reducing the vibration of the fan vehicle during use.

[0015] 2. The rotating block, through the cooperation of steel balls and the second spring, can rotate with the linkage plate while also rotating relative to the linkage plate. The steel balls entering the first groove can limit the relative position of the rotating block and the linkage plate without interference from other external forces, thereby ensuring that the size of the windward surface of the wind turbine does not change during the rotation of the wind turbine. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of an adjustable resistance fan truck according to this utility model. Figure 1 .

[0017] Figure 2 This is a schematic diagram of the structure of an adjustable resistance fan truck according to this utility model. Figure 2 .

[0018] Figure 3 This is a schematic diagram of the impeller (when the windward side is at its maximum) of an adjustable resistance fan truck according to this utility model.

[0019] Figure 4This is an exploded structural diagram of the impeller, blades, and rotating block of an adjustable resistance fan truck according to this utility model.

[0020] Figure 5 This is a schematic diagram of the cross-sectional structure of the rotating block of an adjustable resistance fan vehicle according to this utility model.

[0021] Figure 6 This is a schematic diagram of the impeller (with reduced windward surface) structure of an adjustable resistance fan truck according to this utility model.

[0022] The components in the diagram are labeled as follows: Frame 1, Pedal 2, Handlebar 3, Windmill 4, Linkage Plate 40, First Groove 400, Connecting Pipe 41, Blade 5, Connecting Frame 50, Slide 500, Elastic Component 51, Connecting Cylinder 510, First Spring 511, Rotating Shaft 6, Floating Plate 7, Connecting Rod 70, Moving Block 71, Flexible Rope 72, Rotating Block 8, Rotating Ring 80, Second Groove 800, Steel Ball 81, Second Spring 82. Detailed Implementation

[0023] To further understand the features, technical means, and specific objectives and functions achieved by this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments.

[0024] like Figures 1-6 As shown, this utility model provides an adjustable resistance fan cart, including a frame 1, two sets of pedals 2 and two sets of handles 3. The two pedals 2 are located on the left and right sides of the frame 1 for the user to step on and drive. The two handles 3 are located on the left and right sides of the front end of the frame 1. It also includes a fan wheel 4, blades 5, a rotating shaft 6, a floating plate 7 and a rotating block 8. The pedals 2 are linked to the rotating shaft 6, and the fan wheel 4 is linked to the rotating shaft 6. The fan wheel 4 can rotate with the movement of the pedals 2. The fan wheel 4 is provided with several blades 5 surrounding the rotating shaft 6 of the fan wheel 4. The floating plate 7 is provided on the blades 5 and can move up and down. The rotating block 8 is linked to the floating plate 7 and can rotate relative to the fan wheel 4. The rotating block 8 is used to drive the floating plate 7 to move up and down under the operation of the user. When the floating plate 7 rises or falls, the windward area of ​​the fan wheel 4 increases or decreases accordingly, thereby increasing or decreasing the wind resistance.

[0025] It should be noted that the rotating shaft 6 is rotatably connected to the frame 1, and the handlebar 3 is located at the front end of the frame 1. Preferably, the position and height of the handlebar 3 are adjustable. Figure 1-2 The structure shown can be adapted to the user's height and arm length by adjusting the vertical position of the handle 3. The vertical length of the handle 3 can be set to be adjustable.

[0026] Blades 5 can be screwed onto the wind turbine 4, with the central axes of each blade 5 located in the same plane. The plane formed by the central axes of each blade 5 is perpendicular to the rotation axis 6. The fact that the central axes of the blades 5 are located in the same plane can prevent the center of gravity of the wind turbine 4 from shifting during rotation, thereby causing vibration during the operation of the wind turbine and affecting its reliability.

[0027] The impeller 4 includes a linkage plate 40 and connecting pipes 41 distributed on the linkage plate 40. The linkage plate 40 is linked to the rotating shaft 6. The blades 5 are screwed onto the linkage plate 40 through the connecting pipes 41. When the pedal 2 moves, the linkage plate 40 and the blades 5 rotate around the rotating shaft 6, providing resistance to the movement. The blades 5 can drive the floating plate 7 to move under the rotation of the rotating block 8, thereby changing the windward area. The blades 5 are detachably mounted on the linkage plate 40 through the connecting pipes 41. When installing the impeller 4 on the fan truck, it should be ensured that the rotation angle of each blade 5 is the same. Figure 2 In the structure shown, the blade 5 can face the windward direction directly. When the blade 5 is rotated to the maximum windward angle, the windward surface can be expanded or reduced by controlling the movement of the floating plate 7, thereby adjusting the wind resistance of the fan motor.

[0028] The blade 5 includes a connecting frame 50 and an elastic element 51 connected to the connecting frame 50. The floating plate 7 is confined within the connecting frame 50 and can move radially along the linkage plate 40. The elastic element 51 is connected to the floating plate 7. When the floating plate 7 moves toward the center of the linkage plate 40, the elastic element 51 is compressed. The elastic element 51 is designed so that when the elastic element 51 is compressed, the floating plate 7 tends to increase the windward surface of the impeller 4 by moving. The rotating block 8 can cause the elastic element 51 to compress or return to its original state. Preferably, when the floating plate 7 moves upward, so that the impeller 4 reaches its maximum windward surface, the elastic element 51 is slightly compressed, so that the floating plate 7 is close to the connecting frame 50. When the pedal 2 moves, the blade 5 and the floating plate 7 can produce a small sway under the action of wind force.

[0029] The elastic element 51 includes a connecting cylinder 510 and a first spring 511. The connecting cylinder 510 is disposed on the inner side of the connecting frame 50 near the edge of the linkage plate 40. A connecting rod 70 is disposed on one side of the floating plate 7. The connecting rod 70 can be restricted to move within the connecting cylinder 510. The first spring 511 is sleeved on the connecting rod 70. Moving the connecting rod 70 towards the linkage plate 40 can compress the first spring 511. Figure 4 As shown, the connecting rod 70 and the connecting cylinder 510 structure restrict the floating plate 7 from swaying in directions other than radial movement along the linkage plate 40. At the same time, in order to further increase the adaptability of the device, it is preferable to have a through-hole at the bottom of the connecting cylinder 510, so that the connecting rod 70 can protrude from the connecting frame 50, thereby reducing the problem of the floating plate 7 being restricted from moving downward due to the height of the connecting cylinder 510.

[0030] A sliding groove 500 is provided along the edge of the connecting frame 50, and a moving block 71 is provided along the edge of the floating plate 7. The moving block 71 can move in the sliding groove 500. The moving block 71 is connected to the rotating block 8 by a flexible rope 72. Rotating the rotating block 8 can cause the flexible rope 72 to extend or shorten. Rotating the rotating block 8 causes the flexible rope 72 to extend or shorten, thereby causing the floating blocks to move. Preferably, one end of the flexible rope 72 is fixed to the moving block 71, and the other end is fixed to the rotating block 8. The flexible ropes 72 connected to each floating plate 7 are of the same length. When the rotating block 8 is rotated, the rotating block 8 can simultaneously drive multiple floating blocks to move, thereby ensuring that the center of the impeller 4 remains unchanged when the device rotates, reducing vibration.

[0031] A plurality of first grooves 400 are evenly arranged near the center of the linkage plate 40. The rotating block 8 includes a rotating ring 80, a steel ball 81, and a second spring 82. One end of the rotating block 8 can be restricted to rotate on the linkage plate 40. A plurality of second grooves 800 are arranged on the side of the rotating ring 80 that contacts the linkage plate 40. One end of the second spring 82 is fixed in the second groove 800, and the other end of the second spring 82 is fixedly connected to the steel ball 81. The steel ball 81 can enter the first groove 400 and / or the second groove 800. The flexible rope 72 is connected in the rotating ring 80. When the pedal 2 moves, the rotating block 8 can rotate with the wind turbine 4. When the pedal 2 stops moving, rotating the rotating block 8 can drive the flexible rope 72 to wrap around or unwrap from the rotating block 8, thereby causing the windward area of ​​the blade 5 to shrink or expand. Figure 4-5 As shown, the rotating block 8 can rotate with the linkage plate 40, and rotating the rotating block 8 can also cause it to rotate relative to the linkage plate 40. The arrangement of the first groove 400, the second groove 800, the second spring 82 and the steel ball 81 can limit the rotation of the rotating block 8 relative to the linkage plate 40, and prevent the rotating block 8 from rotating relative to the linkage plate 40 without external force interference.

[0032] Rotating blocks 8 are symmetrically arranged on both sides of the wind turbine 4, and the two rotating blocks 8 are respectively connected to the sides of the floating plate 7. Setting two sets of rotating blocks 8 can increase the symmetry of the device and keep the center of gravity of the wind turbine 4 from shifting. Similarly, the center of gravity of the wind turbine 4 can also be kept from shifting by setting rotating blocks 8 on one side of the linkage plate 40 and setting counterweights on the other side of the linkage plate 40.

[0033] It should be noted that, in order to further increase the adaptability of the device, after the wind turbine 4 and the rotating shaft 6 are installed, a device housing is usually installed to increase the integrity and safety of the device. When the rotating block 8 is rotated without disassembling the fan car housing, a hole can be made in the device housing (not shown in the figure). A gear is set on the outer wall of the rotating ring 80, and a variable rod is set. Another connecting gear is fixedly set at the end of the variable rod. Moving the variable rod drives the connecting gear to mesh with the rotating ring. The rotating block 8 is driven to rotate relative to the linkage plate 40 by stepping on the foot pedal 2.

[0034] The above embodiments only illustrate one or more implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. An adjustable resistance fan bicycle, comprising a frame (1), two sets of pedals (2) and two sets of handlebars (3), wherein the two pedals (2) are disposed on the left and right sides of the frame (1) for use by a user to step on and be driven by the user, and the two handlebars (3) are disposed on the left and right sides of the front end of the frame (1), characterized in that, It also includes a wind turbine (4), blades (5), a rotating shaft (6), a floating plate (7), and a rotating block (8). The pedal (2) is linked to the rotating shaft (6), and the wind turbine (4) is linked to the rotating shaft (6). The wind turbine (4) can rotate with the movement of the pedal (2). The wind turbine (4) is provided with a number of blades (5) surrounding the rotating shaft (6) of the wind turbine (4). The blades (5) are provided with floating plates (7) that can move up and down. The rotating block (8) is linked to the floating plate (7). The rotating block (8) is linked to the wind turbine (4) and can rotate relative to the wind turbine (4). The rotating block (8) is used to drive the floating plate (7) to move up and down under the operation of the user. When the floating plate (7) rises or falls, the windward area of ​​the wind turbine (4) increases or decreases accordingly, thereby increasing or decreasing the wind resistance.

2. The adjustable resistance fan truck according to claim 1, characterized in that, The blades (5) can be screwed onto the wind turbine (4), and the central axes of each blade (5) are located in the same plane. The plane formed by the central axes of each blade (5) is perpendicular to the rotation axis (6).

3. An adjustable resistance fan truck according to claim 1 or 2, characterized in that, The wind turbine (4) includes a linkage plate (40) and connecting pipes (41) distributed on the linkage plate (40). The linkage plate (40) is linked to the rotating shaft (6). The blades (5) are screwed onto the linkage plate (40) through the connecting pipes (41). When the pedal (2) moves, the linkage plate (40) and the blades (5) rotate around the rotating shaft (6) to provide resistance to the movement. The blades (5) can drive the floating plate (7) to move under the rotation of the rotating block (8) to change the windward area.

4. The adjustable resistance fan truck according to claim 3, characterized in that, The blade (5) includes a connecting frame (50) and an elastic element (51) connected to the connecting frame (50). The floating plate (7) is restricted to move radially along the linkage plate (40) within the connecting frame (50). The elastic element (51) is connected to the floating plate (7). When the floating plate (7) moves toward the center of the linkage plate (40), the elastic element (51) is compressed.

5. The adjustable resistance fan truck according to claim 4, characterized in that, The elastic element (51) includes a connecting cylinder (510) and a first spring (511). The connecting cylinder (510) is disposed on the inner side of the connecting frame (50) near the edge of the linkage plate (40). A connecting rod (70) is disposed on one side of the floating plate (7). The connecting rod (70) can be restricted to move within the connecting cylinder (510). The first spring (511) is sleeved on the connecting rod (70). The first spring (511) can be compressed when the connecting rod (70) moves toward the linkage plate (40).

6. The adjustable resistance fan truck according to claim 5, characterized in that, The connecting frame (50) has a sliding groove (500) along its edge, and the floating plate (7) has a moving block (71) along its edge. The moving block (71) can move in the sliding groove (500). The moving block (71) is connected to the rotating block (8) by a flexible rope (72). Rotating the rotating block (8) can cause the flexible rope (72) to extend or shorten.

7. The adjustable resistance fan truck according to claim 6, characterized in that, The linkage plate (40) has several first grooves (400) evenly arranged near its center. The rotating block (8) includes a rotating ring (80), a steel ball (81), and a second spring (82). One end of the rotating block (8) can be restricted to rotate on the linkage plate (40). The rotating ring (80) has several second grooves (800) arranged on the side that contacts the linkage plate (40). One end of the second spring (82) is fixed in the second groove (800), and the other end of the second spring (82) is fixed in place. The steel ball (81) is fixedly connected and can enter the first groove (400) and / or the second groove (800). The flexible rope (72) is connected in the rotating ring (80). When the pedal (2) moves, the rotating block (8) can rotate with the wind turbine (4). When the pedal (2) stops moving, rotating the rotating block (8) can drive the flexible rope (72) to wrap around or unwrap from the rotating block (8), thereby causing the windward area of ​​the blade (5) to shrink or expand.

8. The adjustable resistance fan truck according to claim 1, characterized in that, The wind turbine (4) has symmetrical rotating blocks (8) on both sides, and the two rotating blocks (8) are respectively connected to the side of the floating plate (7).

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