Adjustable wind resistance device and rowing machine

Abstract

The invention provides an adjustable wind resistance device which comprises a wind wheel, a shell assembly and a driving device, a wind cavity, an air inlet and an air outlet are formed in the shell assembly, the wind wheel is installed in the wind cavity, the shell assembly comprises a fixed wind disc and a movable wind disc which are coaxially arranged, a first air inlet is formed in the fixed wind disc, and a second air inlet is formed in the movable wind disc. The overlapped area of the first air inlet and the second air inlet forms an air inlet, and the driving device is fixedly connected with the fixed air disc and drives the movable air disc to rotate so as to adjust the area of the air inlet. The invention further provides a rowing machine which comprises the adjustable wind resistance device and an operation assembly, and the operation assembly comprises a handle and a transmission assembly suitable for being connected with the handle and a wind wheel. According to the wind resistance device, the area of the air inlet is adjusted by arranging the movable wind disc, then the system impedance of the wind resistance device is adjusted, dynamic adjustment of wind resistance is achieved, different impedances can be adaptively provided according to the exercise requirement of a user, and the applicability and user experience of the rowing machine are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of rowing machines, and in particular relates to an adjustable wind resistance device and a rowing machine. Background Art

[0002] In traditional rowing machine designs, the wind resistance device usually adopts a fixed structure, and the resistance cannot be adjusted according to the user's exercise needs and preferences. This fixed wind resistance design limits the applicability and user experience of the rowing machine, because different users may require different resistance levels to achieve the best exercise effect. Summary of the invention

[0003] In view of the above-mentioned defects of the prior art, an object of the present invention is to provide an adjustable wind resistance device and a rowing machine to meet the needs of users.

[0004] To achieve the above-mentioned purpose, the present invention provides an adjustable wind resistance device, including a wind wheel, a shell assembly and a driving device, the shell assembly is formed with a wind cavity, an air inlet and an air outlet, the wind wheel is installed in the wind cavity, the shell assembly includes a coaxially arranged fixed wind disk and a movable wind disk, the fixed wind disk is formed with a first air inlet, the movable wind disk is formed with a second air inlet, the overlapping area of ​​the first air inlet and the second air inlet constitutes the air inlet, the driving device drives the fixed wind disk to be fixedly connected, and the movable wind disk rotates to adjust the area of ​​the air inlet.

[0005] Preferably, the fixed air disk includes a plurality of first air inlets which are rotationally symmetrically arranged, and the movable air disk includes an equal number of second air inlets which are rotationally symmetrically arranged, and when the first air inlets are aligned with the second air inlets, the area of ​​the air inlets is the same as the area of ​​the first air inlets and / or the second air inlets.

[0006] Preferably, one of the first air inlet and / or the second air inlet is crescent-shaped or comma-shaped.

[0007] Preferably, the fixed wind disc further comprises a plurality of first auxiliary air inlets which are rotationally symmetrically arranged, and the movable wind disc comprises an equal number of second auxiliary air inlets which are rotationally symmetrically arranged.

[0008] As a preferred embodiment, the first air inlet and the second air inlet can completely overlap, the first air inlet includes a contraction end and an expansion end, the contraction end and the expansion end are connected by an arc, and the arc is arranged along the rotation direction of the wind wheel. When the wind wheel rotates, the contraction end can first "capture" the air, and then the air gradually enters the fan along the curvature of the arc, making the air intake process smoother and reducing the air intake resistance and noise to a certain extent.

[0009] Preferably, a first open cavity suitable for installing the driving device is formed in the center of the fixed air disc, a second open cavity is formed in the center of the movable air disc, the second open cavity includes a second cavity bottom, and the driving device is transmission-connected to the second cavity bottom.

[0010] Preferably, the second open cavity is suitable for covering the first open cavity, or the first open cavity is suitable for covering the second open cavity.

[0011] As a preferred embodiment: the fixed air disk includes a fixed air inlet area and an extended ring area arranged around the fixed air inlet area, a partition ring arranged along the axial direction of the fixed air disk is arranged between the fixed air inlet area and the extended ring area, the partition ring can increase the structural strength of the fixed air disk, the partition ring is suitable for enclosing an area for accommodating a movable air disk, the movable air disk is coaxially arranged in the fixed air inlet area, the movable air disk includes a movable disk surface, a second opening cavity protruding from the center of the movable disk surface, a guide ring arranged around the outer periphery of the movable disk surface, and a plurality of guide blades extending from the second opening cavity to the guide ring, the guide blades are arranged radially and evenly, a single guide blade has a bending tendency, and the bending direction of the guide blade is the same as the rotation direction of the impeller, which guides the airflow to enter the impeller more smoothly, reduces the turbulence and backflow of the airflow inside the impeller, and at the same time can increase the structural strength and prevent the deformation of the movable air disk.

[0012] As a preference, the second auxiliary air inlet is arranged along the extension direction of the guide vane, which can increase the air intake volume and make the air intake more uniform.

[0013] As a preferred embodiment, it also includes a control component, which includes a control unit and a sensing unit, the sensing unit is suitable for monitoring the real-time position of the movable wind disk, the control unit is suitable for receiving the real-time position information of the movable wind disk and processing it into wind resistance information, and the control unit is also suitable for sending instructions to the drive device to adjust the wind resistance.

[0014] Preferably, the sensing unit includes a variable resistor, the driving device includes a motor, the motor is transmission-connected to the variable resistor via a first gear set, the real-time resistance value of the variable resistor changes with the rotation of the motor, and the real-time resistance value is transmitted to the control unit.

[0015] Preferably: the first gear group and the motor are integrated into a motor box, the motor box includes a first box surface and a second box surface arranged opposite to each other, the variable resistor is installed on the first box surface, the first box surface is assembled in the central area of ​​the fixed air disk, the variable resistor includes a first rotating shaft, the first rotating shaft extends out of the second box surface, the first rotating shaft is rotatably connected to the second rotating shaft through the second gear group, one end of the second rotating shaft is suitable for connecting to the movable air disk, and the motor box is suitable for supporting the other end of the second rotating shaft.

[0016] Preferably, the variable resistor comprises a resistor body and a sliding contact, the sliding contact is connected to the first rotating shaft, and the motor drives the sliding contact to rotate and move on the resistor body to change the resistance length of the resistor body connected to the circuit, thereby changing the real-time resistance value of the variable resistor.

[0017] Preferably, the variable resistor includes a plurality of resistance coils and a switching mechanism, the switching mechanism is connected to the first switching mechanism, and the motor drives the switching mechanism to rotate to change the number of turns of the resistance coil connected to the circuit, thereby changing the real-time resistance value of the variable resistor. This type of variable resistor can achieve more accurate resistance value adjustment, and the change of resistance value is discrete and graded, which can achieve the gear adjustment of wind resistance.

[0018] The present invention also provides a rowing machine, comprising the adjustable wind resistance device and operating assembly as described above, wherein the operating assembly comprises a handle and a transmission assembly suitable for connecting the handle and the wind wheel, the shell assembly comprises a bracket plate, the bracket plate separates the wind chamber and the transmission chamber inside the shell assembly, the fixed wind disc is installed on the bracket plate, and the transmission chamber is suitable for accommodating the transmission assembly.

[0019] Preferably, the wind wheel comprises a wind wheel shaft, the air inlet is arranged at one axial end of the wind wheel, and the air outlet is arranged along the circumference of the wind wheel.

[0020] Preferably, a generator is installed on one side of the support plate, the generator is drivingly connected to the wind wheel shaft, and the generator generates electricity as the wind wheel rotates.

[0021] As a preferred embodiment: the shell assembly includes a first side shell, a second side shell, a first ring shell and a second ring shell, the first side shell, the first ring shell and the bracket plate together form the wind cavity, the air outlet is arranged on the first ring shell, the second side shell, the second ring shell and the bracket plate together form the transmission cavity, the transmission assembly includes a pull rope and a pulley group, the pulley group is connected to the wind wheel shaft, and the second ring shell includes an operating port for the pull rope to enter and exit.

[0022] The beneficial effects of the present invention are:

[0023] (1) By setting a movable wind disk to adjust the area of ​​the air inlet and then adjust the system impedance of the wind resistance device, dynamic adjustment of wind resistance is achieved, and different impedances can be adaptively provided according to the user's exercise needs, thereby improving the applicability and user experience of the rowing machine.

[0024] (2) Through the control components, including the control unit and the sensing unit, the real-time position of the movable fan disk and the intelligent adjustment of the wind resistance are realized, thereby improving the convenience and accuracy of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The present invention provides a schematic structural diagram of a rowing machine.

[0026] Figure 2 A partial schematic diagram of a rowing machine provided by the present invention (excluding the first side shell, the first annular shell, and the second annular shell).

[0027] Figure 3 This is a schematic structural diagram of the wind resistance device provided by the present invention.

[0028] Figure 4 This is a schematic structural diagram of the support plate provided by the present invention.

[0029] Figure 5 This is a schematic structural diagram of the fixed wind disk provided by the present invention.

[0030] Figure 6 This is a schematic diagram of the assembly of the fixed fan disc and the movable fan disc provided by the present invention.

[0031] Figure 7 This is a schematic structural diagram of the movable air disk provided by the present invention.

[0032] Figure 8 An exploded schematic diagram of the motor box provided by the present invention.

[0033] Fig. 9 A schematic diagram of the structure of another fixed wind disk provided by the present invention.

[0034] In the figure: wind wheel 101, bracket plate 102, wind cavity 103, transmission cavity 104, fixed wind disc 105, movable wind disc 106, first air inlet 107, second air inlet 108, extension ring area 109, fixed air inlet area 110, partition ring 111, first open cavity 112, movable disk surface 113, second open cavity 114, guide ring 115, guide vane 116, second cavity bottom 117, variable resistor 118, first rotating shaft 119, second rotating shaft 120, Motor 121, first gear set 122, second gear set 123, motor box 124, support column 125, wind wheel shaft 126, disc 127, generator 128, first box surface 129, second box surface 130, contraction end 131, expansion end 132, air outlet 133, first side plate 134, second side plate 135, first ring shell 136, second ring shell 137, handle 138, pull rope 139, first auxiliary air inlet 141, second auxiliary air inlet 142. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] It should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the scheme of the present invention are shown in the drawings, while other details that are not closely related to the present invention are omitted.

[0037] In addition, it should be noted that the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0038] Example 1

[0039] like Figure 1-9The adjustable wind resistance device includes a wind wheel 101, a shell assembly, a driving device and a control assembly. The shell assembly is formed with a wind cavity 103, an air inlet and an air outlet 133. The wind wheel 101 is installed in the wind cavity 103. The shell assembly includes a fixed wind disc 105 and a movable wind disc 106 arranged coaxially. The fixed wind disc 105 includes two first air inlets 107 arranged rotationally symmetrically. The movable wind disc 106 includes two second air inlets 108 arranged rotationally symmetrically. The overlapping area of ​​the first air inlet 107 and the second air inlet 108 constitutes the air inlet. The driving device drives the movable wind disc 106 to rotate to adjust the area of ​​the air inlet. The adjustment range of the movable wind disc 106 is 90°. When the first air inlet 107 and the second air inlet 108 are aligned, the first air inlet 107 and the second air inlet 108 completely overlap, and the area of ​​the air inlet is the area of ​​the first air inlet 107 or the second air inlet 108. The control component includes a control unit and a sensing unit. The sensing unit is suitable for monitoring the real-time position of the movable wind disk 106. The control unit is suitable for receiving the real-time position information of the movable wind disk 106 and processing it into wind resistance information. The control unit is also suitable for sending instructions to the driving device to adjust the wind resistance.

[0040] In some other embodiments, the variable resistor 118 may be replaced by other devices such as a photoelectric encoder, a mechanical encoder, etc. that can indicate the position of the movable air disk 106 .

[0041] In this embodiment, if Figure 5-7 As shown, the first air inlet 107 and the second air inlet 102 are comma-shaped, and the first air inlet 107 includes a contraction end 131 and an expansion end 132, and the contraction end 131 and the expansion end 132 are connected by an arc, and the arc is set along the rotation direction of the wind wheel 101. When the wind wheel 101 rotates, the contraction end 131 can first "capture" the air, and then the air gradually enters the fan along the curvature of the arc, making the air intake process smoother and reducing the air intake resistance and noise to a certain extent.

[0042] In some other embodiments, such as Fig. 9 As shown, the first air inlet 107 and the second air inlet 102 are crescent-shaped with a large rotation angle, shrinking from the middle to both ends, which not only conforms to fluid dynamics to ensure smooth air intake, but also facilitates the preset of up to 10 gears, fully meeting the user's exercise needs.

[0043] In this embodiment, the fixed wind disc 105 is arranged on the outer side of the movable wind disc 106, that is, on the side away from the impeller. The fixed wind disc 105 includes a fixed air inlet area 110 and an outer extension ring area 109 arranged around the fixed air inlet area 110. A partition ring 111 arranged along the axial direction of the fixed wind disc 105 is arranged between the fixed air inlet area 110 and the outer extension ring area 109. A first opening cavity 112 suitable for installing a driving device is formed in the center of the fixed air inlet area 110. The movable wind disc 106 is coaxially arranged in the fixed air inlet area 110. The disk 106 includes a movable disk surface 113, a second open cavity 114 protruding from the center of the movable disk surface 113, a guide ring 115 arranged around the outer periphery of the movable disk surface 113, and a plurality of guide blades 116 extending from the second open cavity 114 to the guide ring 115. The guide blades 116 are evenly arranged radially, and a single guide blade 116 has a bending tendency, and the bending direction of the guide blade 116 is the same as the rotation direction of the impeller, guiding the airflow to enter the impeller more smoothly, reducing the turbulence and backflow of the airflow inside the impeller. The second open cavity 114 is suitable for covering the first open cavity 112, and the second open cavity 114 includes a second cavity bottom 117, and the driving device is transmission-connected to the second cavity bottom 117.

[0044] In this embodiment, the fixed air disc 105 further includes a plurality of first auxiliary air inlets 141 that are rotationally symmetrically arranged, and the movable air disc 106 includes the same number of second auxiliary air inlets 142 that are rotationally symmetrically arranged in the same shape. The second auxiliary air inlets 142 are arranged along the extension direction of the guide blades 116, which can increase the air intake and make the air intake more uniform.

[0045] In this embodiment, the sensing unit includes a variable resistor 118, the variable resistor 118 includes a first rotating shaft 119, a resistor body and a sliding contact, the sliding contact is connected to the first rotating shaft 119, the driving device includes a motor 121, the motor 121 includes a motor shaft, the motor shaft is connected to the first rotating shaft 119 through a first gear set 122, the motor drives the sliding contact to rotate and move on the resistor body to change the resistance length of the resistor body connected to the circuit, thereby changing the real-time resistance value of the variable resistor 118, and the real-time resistance value is transmitted to the control unit, the control unit is suitable for converting the real-time resistance value into the rotation angle of the motor 121, thereby obtaining the real-time position information of the movable wind disk 106 and further converting it into wind resistance information. The first rotating shaft 119 is also connected to the second rotating shaft 120 through a second gear set 123, and the second rotating shaft 120 is fixedly connected to the second cavity bottom 117.

[0046] In this embodiment, the first gear set 122 and the motor 121 are integrated and assembled in the motor box 124, the motor box 124 includes a first box surface 129 and a second box surface 130 arranged opposite to each other, the variable resistor 118 is installed on the first box surface 129, the first box surface 129 is assembled in the first opening cavity 112, the variable resistor 118 includes a first rotating shaft 119, the first rotating shaft 119, the second rotating shaft 120 and the second gear set 123 extend out of the second box surface 130, one end of the second rotating shaft 120 is connected to the movable wind disk 106, and the motor box 124 is suitable for supporting the other end of the second rotating shaft 120.

[0047] In some other embodiments, the variable resistor 118 includes a plurality of resistance coils and a switching mechanism, the switching mechanism is connected to the first switching mechanism, and the motor 121 drives the switching mechanism to rotate to change the number of turns of the resistance coil connected to the circuit, thereby changing the real-time resistance value of the variable resistor 118. Such a variable resistor 118 can achieve more accurate resistance value adjustment, and the change of the resistance value is discrete and graded, which can achieve the gear adjustment of the wind resistance.

[0048] Example 2

[0049] like Figure 1-8 The rowing machine comprises the adjustable wind resistance device and the operating assembly in Embodiment 1, the operating assembly comprises a handle and a transmission assembly suitable for connecting the handle and the wind wheel 101, the housing assembly comprises a bracket plate 102, the bracket plate 102 separates the air outlet chamber 103 and the transmission chamber 104 inside the housing assembly, the fixed wind disc 105 is installed to the bracket plate 102 through a plurality of support columns 125 arranged along its axial direction, and the transmission chamber 104 is suitable for accommodating the transmission assembly. The wind wheel 101 comprises a wind wheel shaft 126, the wind wheel shaft 126 is arranged horizontally and perpendicular to the length direction of the rowing machine, the air inlet is arranged at one axial end of the wind wheel 101, and a disc 127 is arranged at one end of the wind wheel 101 away from the air inlet, and the disc 127 is arranged parallel to the bracket plate 102. The air outlet 133 is arranged along the circumference of the wind wheel 101. A generator 128 is arranged on the bracket plate 102, and the generator 128 and the wind wheel shaft 126 are driven by a belt, and the generator generates electricity as the wind wheel rotates.

[0050] In this embodiment, the shell assembly includes a first side shell, a second side shell, a first ring shell 136 and a second ring shell 137. The first side shell, the first ring shell 136 and the bracket plate 102 enclose a wind cavity 103. The air outlet 133 is arranged on the first ring shell 136. The second side shell, the second ring shell 137 and the bracket plate 102 enclose a transmission cavity 104. The transmission assembly includes a pull rope 139 and a pulley group. The pulley group is connected to the wind wheel shaft 126. The pull rope 139 is suitable for connecting the handle 138 and the pulley group. The second ring shell 137 includes an operating port for the pull rope 139 to enter and exit.

[0051] The above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention.

Claims

1. An adjustable wind resistance device, characterized in that: It includes a wind wheel, a shell assembly and a driving device, the shell assembly is formed with a wind cavity, an air inlet and an air outlet, the wind wheel is installed in the wind cavity, the shell assembly includes a coaxially arranged fixed wind disk and a movable wind disk, the fixed wind disk is formed with a first air inlet, the movable wind disk is formed with a second air inlet, the overlapping area of ​​the first air inlet and the second air inlet constitutes the air inlet, the driving device is fixedly connected to the fixed wind disk, and drives the movable wind disk to rotate to adjust the area of ​​the air inlet.

2. The adjustable wind resistance device according to claim 1, characterized in that: The fixed air disk includes a plurality of first air inlets that are rotationally symmetrically arranged, and the movable air disk includes an equal number of second air inlets that are rotationally symmetrically arranged. When the first air inlets are aligned with the second air inlets, the area of ​​the air inlets is the same as the area of ​​the first air inlet and / or the second air inlet.

3. The adjustable wind resistance device according to claim 2, characterized in that: One of the first air inlet and / or the second air inlet is crescent-shaped or comma-shaped.

4. A rowing machine according to claim 3, characterized in that: The fixed wind disc further comprises a plurality of first auxiliary air inlets which are arranged rotationally symmetrically, and the movable wind disc comprises an equal number of second auxiliary air inlets which are arranged rotationally symmetrically.

5. The adjustable wind resistance device according to claim 1, characterized in that: A first opening cavity suitable for installing the driving device is formed in the center of the fixed air disc.

6. The adjustable wind resistance device according to claim 5, characterized in that: A second open cavity is formed in the center of the movable air disc. The second open cavity includes a second cavity bottom. The driving device is transmission-connected to the second cavity bottom.

7. The adjustable wind resistance device according to claim 6, characterized in that: The second open cavity is suitable for covering the first open cavity, or the first open cavity is suitable for covering the second open cavity.

8. An adjustable wind resistance device according to claims 1-7, characterized in that: It also includes a control component, which includes a control unit and a sensing unit. The sensing unit is suitable for monitoring the real-time position of the movable wind disk, the control unit is suitable for receiving the real-time position information of the movable wind disk and processing it into wind resistance information, and the control unit is also suitable for sending instructions to the drive device to adjust the wind resistance.

9. The adjustable wind resistance device according to claim 8, characterized in that: The sensing unit includes a variable resistor, the driving device includes a motor, the motor is transmission-connected to the variable resistor via a first gear set, the real-time resistance value of the variable resistor changes with the rotation of the motor, and the real-time resistance value is transmitted to the control unit.

10. The adjustable wind resistance device according to claim 9, characterized in that: The first gear set and the motor are integrated and assembled in a motor box, and the motor box includes a first box surface and a second box surface arranged opposite to each other. The variable resistor is installed on the first box surface, and the first box surface is assembled in the central area of ​​the fixed air disk. The variable resistor includes a first rotating shaft, and the first rotating shaft extends out of the second box surface. The first rotating shaft is rotatably connected to the second rotating shaft through the second gear set, and one end of the second rotating shaft is suitable for connecting to the movable air disk.

11. The adjustable wind resistance device according to claim 10, characterized in that: The sensing unit includes a signal receiver and a plurality of signal transmitters suitable for emitting different signals. The signal receiver is arranged on the fixed wind disk, and the signal transmitters are evenly distributed circumferentially on the movable wind disk. The signal receiver and the signal transmitter are arranged opposite to each other, and the signal receiver is suitable for receiving a signal emitted by one of the signal transmitters and transmitting it to the control unit.

12. A rowing machine, characterized in that: It comprises an adjustable wind resistance device and an operating component as described in any one of claims 1-11, the operating component comprises a handle and a transmission component suitable for connecting the handle and the wind wheel, the shell component comprises a bracket plate, the bracket plate separates the wind chamber and the transmission chamber inside the shell component, the fixed wind disc is mounted to the bracket plate, and the transmission chamber is suitable for accommodating the transmission component.

13. A rowing machine according to claim 12, characterized in that: A generator is installed on one side of the support plate. The generator is drivingly connected to the wind wheel shaft, and the generator generates electricity as the wind wheel rotates.

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