Adjustable wind resistance device and rowing machine

Abstract

The utility model 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 utility model 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 through the movable wind disc, then the system impedance of the wind resistance device is adjusted, dynamic adjustment of wind resistance is achieved, impedance 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 utility model belongs to the rowing machine technical field especially, it relates to an adjustable wind resistance device and rowing machine. BACKGROUND

[0002] In the traditional rowing machine design, the wind resistance device usually adopts fixed structure, and the resistance size cannot be adjusted according to the exercise demand and preference of user. This fixed wind resistance design limits the applicability and user experience of rowing machine, because different users may need different resistance levels to achieve the best exercise effect. SUMMARY

[0003] In view of the defects of the prior art, the utility model aims at providing an adjustable wind resistance device and rowing machine to meet the needs of users.

[0004] To achieve the above object, the utility model provides an adjustable wind resistance device, including wind wheel, shell assembly and drive arrangement, the shell assembly is formed with wind cavity, air inlet and air outlet, the wind wheel is installed in the wind cavity, the shell assembly includes coaxial fixed wind disc and movable wind disc, the fixed wind disc is formed with first air inlet, the movable wind disc is formed with second air inlet, the overlapping area of first air inlet and second air inlet constitutes the air inlet, the drive arrangement drives fixed connection with fixed wind disc, and the movable wind disc rotates to adjust the area of air inlet.

[0005] As preferred, the fixed wind disc includes a plurality of rotationally symmetrically arranged first air inlets, the movable wind disc includes a plurality of rotationally symmetrically arranged second air inlets, when the first air inlet and the second air inlet are aligned, the area of the air inlet is the area of the first air inlet and / or the second air inlet.

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

[0007] As preferred, the fixed wind disc further includes a plurality of rotationally symmetrically arranged first auxiliary air inlets, and the movable wind disc includes a plurality of rotationally symmetrically arranged second auxiliary air inlets.

[0008] As preferred, the first air inlet and the second air inlet can completely coincide, the first air inlet includes a contraction end and an expansion end, the contraction end and the expansion end are connected through an arc line, and the arc line is arranged along the rotation direction of the wind wheel. When the wind wheel rotates, the contraction end can first "capture" air, and then the air gradually enters the fan along the arc of the arc line, so that the air intake process is more smooth, and the air intake resistance and noise are reduced to a certain extent.

[0009] As preferred: the central part of the fixed wind disc is provided with a first opening cavity suitable for installing the driving device, and the central part of the movable wind disc is provided with a second opening cavity, which comprises a second cavity bottom, and the driving device is drivingly connected to the second cavity bottom.

[0010] As preferred: the second opening cavity is suitable for covering the first opening cavity, or the first opening cavity is suitable for covering the second opening cavity.

[0011] As preferred: the fixed wind disc comprises a fixed air inlet area and an outer extension ring area arranged around the fixed air inlet area, and a partition ring is arranged axially along the fixed wind disc between the fixed air inlet area and the outer extension ring area, which can increase the structural strength of the fixed wind disc, and the partition ring is suitable for enclosing an area for accommodating the movable wind disc, and the movable wind disc is coaxially arranged in the fixed air inlet area, and the movable wind disc comprises a movable disc surface, a second opening cavity protruding from the center of the movable disc surface, a flow guide ring arranged around the outer periphery of the movable disc surface, and a plurality of flow guide vanes extending from the second opening cavity to the flow guide ring, the flow guide vanes are uniformly arranged in a radial manner, a single flow guide vane has a bending tendency, and the bending direction of the flow guide vane is the same as the rotation direction of the impeller, which can guide the airflow to enter the impeller more smoothly, reduce the turbulence and backflow of the airflow in the impeller, and also increase the structural strength and prevent the deformation of the movable wind disc.

[0012] As preferred: the second auxiliary air inlet is arranged along the extension direction of the flow guide vanes, which can increase the air inlet amount and make the air inlet more uniform.

[0013] As preferred: it further comprises a control assembly, which comprises a control unit and a sensing unit, the sensing unit is suitable for monitoring the real-time position of the movable wind disc, the control unit is suitable for receiving the real-time position information of the movable wind disc and processing it into wind resistance information, and the control unit is also suitable for sending instructions to the driving device to adjust the wind resistance.

[0014] As preferred: the sensing unit comprises a variable resistor, the driving device comprises a motor, the motor is drivingly connected to the variable resistor through 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] As preferred: the first gear set and the motor are assembled in a motor box, the motor box comprises oppositely arranged first box face and second box face, the variable resistor is mounted on the first box face, the first box face is assembled in the central region of the fixed wind disc, the variable resistor comprises a first rotating shaft, the first rotating shaft extends out of the second box face, the first rotating shaft is rotationally connected with a second rotating shaft through a second gear set, one end of the second rotating shaft is adapted to connect the movable wind disc, the motor box is adapted to support the other end of the second rotating shaft.

[0016] As preferred: the variable resistor comprises a resistor body and a sliding contact, the sliding contact is connected to the first rotating shaft, the motor drives the sliding contact to rotate 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] As preferred: the variable resistor comprises a plurality of resistance coils and a switching mechanism, the switching mechanism is connected to the first switching mechanism, 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 kind of variable resistor can realize more accurate resistance value adjustment, and the change of resistance value is discrete and has levels, which can realize gear adjustment of wind resistance.

[0018] The utility model also provides a rowing machine, including operating assembly and adjustable wind resistance device as above, operating assembly includes handle and is suitable for connecting handle and transmission assembly of wind wheel, the shell subassembly includes support plate, the support plate is separated in the inner portion of shell subassembly and is separated into wind cavity and transmission cavity, the fixed wind disc is installed to the support plate, transmission cavity is suitable for containing transmission assembly.

[0019] As preferred: the wind wheel comprises a wind wheel shaft, the air inlet is arranged at one end of the axial direction of the wind wheel, and the air outlet is arranged along the circumferential direction of the wind wheel.

[0020] As preferred: a generator is mounted on one side of the support plate, the generator is in transmission connection with the wind wheel shaft, and the generator generates electricity when the wind wheel rotates.

[0021] As preferred: the shell subassembly comprises 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 support plate form the wind cavity, the air outlet is arranged on the first ring shell, the second side shell, the second ring shell and the support plate form the transmission cavity, the transmission assembly comprises a pull rope and a pulley set, the pulley set is connected to the wind wheel shaft, and the second ring shell comprises an operation port for the pull rope to enter and exit.

[0022] The utility model discloses a beneficial effect is:

[0023] (1) by setting the movable wind disc adjustment air inlet area and then adjust the system impedance of the wind resistance device, realized the dynamic regulation of wind resistance, can provide different impedance adaptively according to the user exercise demand, improved the applicability and user experience of rowing machine.

[0024] (2) through control assembly, including control unit and inductive unit, realized the monitoring of movable wind disc real-time position and the intelligent regulation of wind resistance, improved the convenience and accuracy of operation. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is the structure schematic diagram of a rowing machine provided by the utility model.

[0026] Figure 2 is the local schematic diagram of a rowing machine provided by the utility model (not including first side shell, first ring shell, second ring shell).

[0027] Figure 3 is the structure schematic diagram of wind resistance device provided by the utility model.

[0028] Figure 4 is the structure schematic diagram of support disc provided by the utility model.

[0029] Figure 5 is the structure schematic diagram of fixed wind disc provided by the utility model.

[0030] Figure 6 is the assembly schematic diagram of fixed wind disc and movable wind disc provided by the utility model.

[0031] Figure 7 is the structure schematic diagram of movable wind disc provided by the utility model.

[0032] Figure 8 is the explosion schematic diagram of motor box provided by the utility model.

[0033] Figure 9 is the structure schematic diagram of another fixed wind disc provided by the utility model.

[0034] In the figure: wind wheel 101, support plate 102, wind cavity 103, transmission cavity 104, fixed wind disc 105, movable wind disc 106, first air inlet 107, second air inlet 108, outer extension ring area 109, fixed air inlet area 110, partition ring 111, first opening cavity 112, movable disc surface 113, second opening cavity 114, flow guide ring 115, flow guide blade 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, contracted end 131, expanded 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 scheme and advantages of the utility model more clear, the utility model is described in detail below in combination with the drawings and specific embodiments.

[0036] Here, it also needs to be explained that, in order to avoid the fact that the utility model is obscured by unnecessary details, only the structures and / or processing steps closely related to the scheme of the utility model are shown in the drawings, and other details not closely related to the utility model are omitted.

[0037] In addition, it also needs to be explained that the term "comprises", "includes" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or equipment.

[0038] Embodiment 1

[0039] As Figures 1-9The adjustable air resistance device comprises 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, and the wind wheel 101 is installed in the wind cavity 103. The shell assembly comprises a fixed wind disc 105 and a movable wind disc 106 coaxially arranged. The fixed wind disc 105 comprises two first air inlets 107 arranged in rotational symmetry, and the movable wind disc 106 comprises two second air inlets 108 arranged in rotational symmetry. The overlapping area of the first air inlets 107 and the second air inlets 108 forms 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 inlets 107 and the second air inlets 108 are arranged in alignment, the first air inlets 107 and the second air inlets 108 are completely coincident, and the area of the air inlet is the area of the first air inlets 107 or the second air inlets 108. The control assembly comprises a control unit and a sensing unit. The sensing unit is adapted to monitor the real-time position of the movable wind disc 106. The control unit is adapted to receive the real-time position information of the movable wind disc 106 and process it into air resistance information. The control unit is also adapted to send instructions to the driving device to adjust the air resistance.

[0040] In some other embodiments, the variable resistor 118 can be replaced by a photoelectric encoder, a mechanical encoder or other devices capable of indicating the position of the movable wind disc 106.

[0041] In the present embodiment, as shown in Figures 5-7 The first air inlets 107 and the second air inlets 102 are in the shape of a comma. The first air inlets 107 comprise a constricted end 131 and an enlarged end 132. The constricted end 131 and the enlarged end 132 are connected by an arc line. The arc line is arranged in the direction of rotation of the wind wheel 101. When the wind wheel 101 rotates, the constricted end 131 can first "capture" air, and then the air gradually enters the fan along the curvature of the arc line, making the air intake process smoother and reducing air intake resistance and noise to a certain extent.

[0042] In some other embodiments, as shown in Figure 9 The first air inlets 107 and the second air inlets 102 are in the shape of a crescent moon. The rotation angle is large. The shape is constricted from the middle to both ends, which not only meets the smooth air intake of fluid dynamics, but also facilitates the pre-setting of up to 10 gear positions, fully meeting the exercise needs of users.

[0043] In the embodiment, the fixed air disc 105 is arranged outside the movable air disc 106, i.e. away from the impeller, and comprises 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 is arranged axially along the fixed air disc 105 between the fixed air inlet area 110 and the outer extension ring area 109. A first opening cavity 112 is formed in the center of the fixed air inlet area 110 and is suitable for mounting a driving device. The movable air disc 106 is coaxially arranged in the fixed air inlet area 110 and comprises a movable disc surface 113, a second opening cavity 114 protruding in the center of the movable disc surface 113, a flow guide ring 115 arranged around the outer periphery of the movable disc surface 113, and a plurality of flow guide vanes 116 extending from the second opening cavity 114 to the flow guide ring 115. The flow guide vanes 116 are uniformly arranged in a radial manner. A single flow guide vane 116 has a bending tendency, and the bending direction of the flow guide vane 116 is the same as the rotation direction of the impeller, which guides the airflow to enter the impeller more smoothly and reduces the turbulence and backflow of the airflow inside the impeller. The second opening cavity 114 is suitable for covering the first opening cavity 112, and the second opening cavity 114 comprises a second cavity bottom 117 to which the driving device is transmissionally connected.

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

[0045] In the embodiment, the sensing unit comprises a variable resistor 118, which comprises a first rotating shaft 119, a resistor body, and a sliding contact connected to the first rotating shaft 119. The driving device comprises a motor 121, which comprises a motor shaft transmissionally 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. The real-time resistance value is transmitted to the control unit, which 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 air disc 106 and further converting it into the wind resistance information. The first rotating shaft 119 is also transmissionally connected to a 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 the embodiment, the first gear set 122 and the motor 121 are integrated in the motor box 124, the motor box 124 comprises a first box face 129 and a second box face 130 oppositely arranged, the variable resistor 118 is mounted on the first box face 129, the first box face 129 is assembled in the first opening cavity 112, the variable resistor 118 comprises 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 face 130, one end of the second rotating shaft 120 is connected with the movable fan disc 106, and the motor box 124 is adapted to support the other end of the second rotating shaft 120.

[0047] In some other embodiments, the variable resistor 118 comprises a plurality of resistance coils and a switching mechanism, the switching mechanism is connected with 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, so as to change the real-time resistance value of the variable resistor 118. Such a variable resistor 118 can realize more accurate resistance value adjustment, and the change of the resistance value is discrete and has levels, so that gear adjustment of the air resistance can be realized.

[0048] Embodiment 2

[0049] As Figures 1-8 described, a rowing machine comprises an operating assembly and the adjustable air resistance device in the embodiment 1, the operating assembly comprises a handle and a transmission assembly adapted to connect the handle and the fan wheel 101, the housing assembly comprises a support plate 102, the support plate 102 divides the housing assembly into an air cavity 103 and a transmission cavity 104, the fixed fan disc 105 is mounted to the support plate 102 through a plurality of support columns 125 arranged along the axial direction of the fixed fan disc 105, and the transmission cavity 104 is adapted to accommodate the transmission assembly. The fan wheel 101 comprises a fan wheel shaft 126, the fan wheel shaft 126 is arranged horizontally and perpendicularly to the length direction of the rowing machine, an air inlet is arranged at one end of the fan wheel 101 in the axial direction, a disc 127 is arranged at the end of the fan wheel 101 away from the air inlet, and the disc 127 is arranged parallel to the support plate 102. An air outlet 133 is arranged along the circumferential direction of the fan wheel 101. An electric generator 128 is arranged on the support plate 102, and the electric generator 128 is driven by the fan wheel shaft 126 through a belt transmission, so that the electric generator generates electricity when the fan wheel rotates.

[0050] In the embodiment, the housing assembly comprises 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 support plate 102 form the air 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 support plate 102 form the transmission cavity 104, the transmission assembly comprises a pull rope 139 and a pulley set, the pulley set is connected with the fan wheel shaft 126, the pull rope 139 is adapted to connect a handle 138 and the pulley set, and the second ring shell 137 comprises an operation opening for the pull rope 139 to enter and exit.

[0051] The above examples are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present application.

Claims

1. An adjustable wind resistance device, characterized by The adjustable air resistance device comprises 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 comprises a fixed wind disc and a movable wind disc arranged coaxially, the fixed wind disc is formed with a first air inlet, the movable wind disc 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 with the fixed wind disc and drives the movable wind disc to rotate to adjust the area of the air inlet.

2. An adjustable resistance device according to claim 1, wherein, The fixed wind disc comprises a plurality of first air inlets arranged rotationally symmetrically, the movable wind disc comprises a same number of second air inlets arranged rotationally symmetrically, when the first air inlets and the second air inlets are arranged in alignment, the area of the air inlet is the area of the first air inlets and / or the second air inlets.

3. An adjustable resistance device according to claim 2, wherein, One of the first air inlets and / or the second air inlets is crescent-shaped or comma-shaped.

4. An adjustable resistance device according to claim 3, wherein, The fixed wind disc further comprises a plurality of first auxiliary air inlets arranged rotationally symmetrically, the movable wind disc comprises a same number of second auxiliary air inlets arranged rotationally symmetrically.

5. An adjustable resistance device according to claim 1, wherein, The central part of the fixed wind disc is formed with a first opening cavity suitable for mounting the driving device.

6. An adjustable resistance device according to claim 5, wherein, The central part of the movable wind disc is formed with a second opening cavity, the second opening cavity comprises a second cavity bottom, the driving device is drivingly connected to the second cavity bottom.

7. An adjustable resistance device according to claim 6, wherein, The second opening cavity is suitable for covering the first opening cavity, or the first opening cavity is suitable for covering the second opening cavity.

8. An adjustable resistance device according to any one of claims 1 to 7, wherein the at least one adjustable resistance element comprises a plurality of adjustable resistance elements. The adjustable air resistance device further comprises a control assembly, the control assembly comprises a control unit and a sensing unit, the sensing unit is suitable for monitoring the real-time position of the movable wind disc, the control unit is suitable for receiving the real-time position information of the movable wind disc and processing it into air resistance information, the control unit is further suitable for sending an instruction to the driving device to adjust the air resistance.

9. An adjustable resistance device according to claim 8, wherein, The sensing unit comprises a variable resistor, the driving device comprises a motor, the motor is drivingly connected to the variable resistor through 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. An adjustable resistance device according to claim 9, wherein, The first gear set and the motor are integrally assembled in a motor box, the motor box comprises oppositely arranged first and second box faces, the variable resistor is mounted on the first box face, the first box face is assembled in the central area of the fixed wind disc, the variable resistor comprises a first rotating shaft, the first rotating shaft extends out of the second box face, the first rotating shaft is rotationally connected to a second rotating shaft through a second gear set, and one end of the second rotating shaft is suitable for connecting the movable wind disc.

11. A rowing machine characterized by The adjustable air resistance device comprises an operating assembly and a variable air resistance device as claimed in any one of claims 1-10, the operating assembly comprises a handle and a transmission assembly suitable for connecting the handle and the wind wheel, the shell assembly comprises a support plate, the support plate separates the wind cavity and a transmission cavity in the shell assembly, the fixed wind disc is mounted to the support plate, and the transmission cavity is suitable for accommodating the transmission assembly.

12. An ergometer according to claim 11, characterized in that One side of the support plate is mounted with a generator, the generator is drivingly connected with the shaft of the wind wheel, and the generator generates electricity with the rotation of the wind wheel.

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