CN217724522U

CN217724522U - Resistance providing device for rowing machine and rowing machine

Info

Publication number: CN217724522U
Application number: CN202221851223.5U
Authority: CN
Inventors: 徐文斌
Original assignee: Shenzhen Calorie Sports Technology Co ltd
Current assignee: Shenzhen Calorie Sports Technology Co ltd
Priority date: 2022-07-18
Filing date: 2022-07-18
Publication date: 2022-11-04
Anticipated expiration: 2032-07-18

Abstract

The present disclosure relates to a resistance providing apparatus for a rowing machine, which includes an energy conversion module, an energy storage module, and a control module, wherein the energy conversion module is configured to be driven under an external force to convert mechanical energy into electric energy and provide resistance to the external force; the energy storage module is configured to store the electric energy generated by the energy conversion module; the control module is configured to be driven by at least one of the energy conversion module or the energy storage module and to control the resistance provided by the energy conversion module to remain constant. Like this, when this disclosed a resistance provides device for rowing machine is applied to rowing machine, can be so that rowing machine's putting can be unrestricted, more freely, can also make the numerical value that user that rowing machine acquireed consumed the energy more accurate in the motion process.

Description

Resistance providing device for rowing machine and rowing machine

Technical Field

The present disclosure relates to the field of sports machinery, more precisely to a resistance providing device for a rowing machine; the present disclosure also relates to a rowing machine.

Background

The rowing machine is a body-building device for simulating rowing movement, the most important core part of the rowing machine is a damping structure generating resistance, the most common structures are a wind resistance structure, a water resistance structure and a magnetic resistance structure, and although the structures can realize the effect of exercise and body-building by generating resistance, the rowing machine has many defects.

Specifically, the resistance and the rotating speed generated by the wind resistance structure and the water resistance structure are in a nonlinear relationship, and constant torque operation cannot be realized. The reluctance structure is not only complex in composition, but also must provide resistance by connecting to a power supply, thereby limiting the moving space of the rowing machine. Therefore, the wind resistance, water resistance and magnetic resistance structure can not meet the requirements of users well.

SUMMERY OF THE UTILITY MODEL

The present disclosure provides a resistance providing device for a rowing machine and a rowing machine for solving the problems existing in the prior art.

According to a first aspect of the present disclosure, there is provided a resistance providing device for a rowing machine, comprising:

an energy conversion module configured to be driven by an external force to convert mechanical energy into electrical energy and provide resistance to the external force;

an energy storage module configured to store electrical energy generated by the energy conversion module;

a control module configured to be driven by at least one of the energy conversion module or the energy storage module and to control a resistance provided by the energy conversion module to remain constant.

In one embodiment of the present disclosure, the energy conversion module is a dc generator, and the energy storage module is a battery;

the control module includes a control unit configured to be powered by at least one of the DC generator or the battery and to control a current output by the DC generator to be constant.

In one embodiment of the present disclosure, the control module further comprises an input unit;

the input unit is configured to send a control signal to the control unit, the control signal including a signal indicative of a set current;

the control unit is configured to control the direct current generator to output the set current based on the control signal.

In one embodiment of the present disclosure, further comprising a braking resistor, the braking resistor and the battery being configured to switch between on or off states with the dc generator;

the control unit is configured to control at least one of the battery and the brake resistor to be connected with the direct current generator to control the current output by the direct current generator to be reduced to the set current when the real-time current output by the direct current generator is detected to be larger than the set current.

In one embodiment of the disclosure, the control unit is configured to control the braking resistor to be connected to the dc generator to control the current output by the dc generator to be reduced to the set current when it is detected that the battery is fully charged and the real-time current is greater than the set current.

In one embodiment of the present disclosure, the input unit is configured to be powered by the battery;

the control unit is configured to be powered by the DC generator.

In one embodiment of the present disclosure, further comprising:

the direct current generator, the battery and the control module are all arranged on the rack;

the first transmission mechanism is configured to drive the rotating shaft of the direct current generator to rotate under the condition of applied tension.

In one embodiment of the present disclosure, the first transmission mechanism includes a coil spring configured to be extended by an applied tensile force or retracted by its own elastic force;

the first transmission mechanism is configured to drive the rotating shaft of the direct current generator to rotate under the condition that the coil spring is stretched under the action of applied tension.

In one embodiment of the present disclosure, the first transmission mechanism further includes:

the coil spring mounting wheel is rotatably arranged on the rack, surrounds the coil spring mounting wheel and is configured to drive the coil spring mounting wheel to rotate;

the direct current generator comprises a direct current generator, a coil spring pulley and a coil spring mounting wheel, wherein the direct current generator is arranged on the direct current generator, the coil spring pulley and a rotating shaft of the direct current generator are in mutual transmission, a one-way bearing is arranged between the coil spring pulley and the coil spring mounting wheel, and the coil spring mounting wheel is configured to drive the coil spring pulley to rotate when the coil spring extends through the one-way bearing.

In one embodiment of the present disclosure, further comprising:

the first transmission mechanism is configured to drive a rotating shaft of the direct current generator to rotate through the second transmission mechanism, and the transmission ratio of the second transmission mechanism is smaller than 1.

In one embodiment of the present disclosure, the second transmission mechanism includes:

a first pulley rotatably disposed on the frame;

the second belt pulley is rotatably arranged on the rack and is fixedly connected with the first belt pulley;

one end of the first belt is sleeved on the coil spring belt pulley, and the other end of the first belt is sleeved on the first belt pulley;

one end of the second belt is sleeved on the second belt wheel, and the other end of the second belt is sleeved on a rotating shaft of the direct current generator;

wherein the diameter of the coil spring belt pulley is larger than that of the first belt pulley, and the diameter of the second belt pulley is larger than that of the rotating shaft of the direct current generator.

In one embodiment of the present disclosure, further comprising:

hold-down mechanism, hold-down mechanism set up in the frame, include:

the rotating part is arranged on the rack in a rotatable mode;

a pinch roller rotatably disposed on the rotating member;

a compression spring, a first end of the compression spring is fixedly arranged on the frame, the other end of the compression spring is fixedly arranged on the rotating piece, and the compression spring is constructed to enable the compression wheel to be attached to the first belt or the second belt.

In one embodiment of the present disclosure, the pressing spring and the pressing wheel are disposed on both sides of the rotational axis of the rotating member.

According to a second aspect of the present disclosure, there is provided a rowing machine including:

a body;

the resistance providing device for the rowing machine is arranged on the machine body, and the energy conversion module is configured to be driven under the action of pulling force of a user.

When the resistance providing device for the rowing machine is applied to the rowing machine, the control module is driven by at least one of the energy conversion module or the energy storage module, and external power supply is not needed, so that the rowing machine can be placed freely without limitation; and the control module can control the resistance provided by the energy conversion module to keep constant, so that a user can receive uniform resistance when using the rowing machine, and the numerical value of the energy consumed by the user in the movement process acquired by the rowing machine is more accurate.

Other features of the present disclosure and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the disclosure and together with the description, serve to explain the principles of the disclosure.

FIG. 1 is a logic schematic diagram of a resistance providing device for a rowing machine provided by an embodiment of the present disclosure;

FIG. 2 is yet another logic diagram of a resistance providing device for a rowing machine provided by an embodiment of the present disclosure;

FIG. 3 is a schematic perspective view of a resistance providing device for a rowing machine provided by embodiments of the present disclosure;

FIG. 4 is a further perspective view of a resistance providing device for a rowing machine provided in an embodiment of the present disclosure;

FIG. 5 is a schematic perspective view of a first transmission and a second transmission provided by embodiments of the present disclosure;

FIG. 6 is a schematic perspective view of a first transmission mechanism, a second transmission mechanism and a DC generator provided by an embodiment of the present disclosure;

FIG. 7 is a perspective view of a portion of a first transmission mechanism provided in an embodiment of the present disclosure;

FIG. 8 is a perspective view of a portion of a second transmission provided in accordance with an embodiment of the present disclosure;

fig. 9 is an exploded schematic view of a second drive mechanism provided by an embodiment of the present disclosure.

The correspondence between the names and reference numerals of the respective components in fig. 1 to 9 is as follows:

1-an energy conversion module; 11-a direct current generator; 111-a rotating shaft; 12-a support base; 2-an energy storage module; 21-a battery; 3-a control module; 31-a control unit; 32-an input unit; 4-brake resistance; 5-bus capacitance; 6-a frame; 61-a first fixing plate; 62-a second fixing plate; 63-a third fixing plate; 7-a first transmission mechanism; 71-coil spring; 72-a pull cord; 73-coil spring mounting wheels; 74-coil spring pulley; 75-one-way bearing; 8-a second transmission mechanism; 81-a first pulley; 82-a second pulley; 83-a first belt; 84-a second belt; 85-a bearing; 9-a pressing mechanism; 91-a rotating member; 92-a pinch roller; 93-hold down spring.

Detailed Description

Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present disclosure unless specifically stated otherwise.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the disclosure, its application, or uses.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be discussed further in subsequent figures.

Specific embodiments of the present disclosure are described below with reference to the accompanying drawings.

In this document, "upper", "lower", "front", "rear", "left", "right", and the like are used only to indicate relative positional relationships between relevant portions, and do not limit absolute positions of the relevant portions.

In this document, "first", "second", and the like are used only for distinguishing one from another, and do not indicate the degree and order of importance, the premise that each other exists, and the like.

In this context, "equal," "same," and the like are not strictly mathematical and/or geometric limitations, but also encompass errors that may be understood by one skilled in the art and that may be allowed for manufacturing or use, etc.

The present disclosure provides a resistance providing apparatus for a rowing machine, including an energy conversion module, an energy storage module, and a control module, wherein the energy conversion module is configured to be driven under an external force to convert mechanical energy into electric energy and provide resistance to the external force; the energy storage module is configured to store the electric energy generated by the energy conversion module; the control module is configured to be driven by at least one of the energy conversion module or the energy storage module and to control the resistance provided by the energy conversion module to remain constant.

Thus, when the resistance providing device for the rowing machine is applied to the rowing machine, the control module is driven by at least one of the energy conversion module or the energy storage module, and external power supply is not needed, so that the rowing machine can be placed freely without limitation; and the control module can control the resistance provided by the energy conversion module to keep constant, so that a user can receive uniform resistance when using the rowing machine, and the numerical value of the energy consumed by the user in the movement process acquired by the rowing machine is more accurate.

For easy understanding, the specific structure and the operation principle of the resistance providing device for a rowing machine of the present disclosure will be described in detail with reference to fig. 1 to 9 in conjunction with one embodiment.

As shown in fig. 1, the present disclosure provides a resistance providing apparatus for a rowing machine, including an energy conversion module 1, an energy storage module 2, and a control module 3. Specifically, the energy conversion module 1 is configured to be driven by an external force to convert mechanical energy into electric energy and provide resistance to the external force. Specifically, in an embodiment of the present disclosure, the energy conversion module 1 may be the dc generator 11 in fig. 2 or other components capable of realizing energy conversion. The energy storage module 2 may be a battery 21, a super capacitor, or other components capable of storing the electric energy generated by the energy conversion module 1 in fig. 2. The control module 3 is configured to be driven by at least one of the energy conversion module 1 or the energy storage module 2, and controls the resistance provided by the energy conversion module 1 to be kept constant.

Thus, in the working process of the resistance providing device for the rowing machine, the control module 3 is driven by at least one of the energy conversion module 1 or the energy storage module 2 without external power supply, so that the rowing machine can be placed freely without limitation; and because the control module 3 can control the resistance provided by the energy conversion module 1 to keep constant, a user can be subjected to uniform resistance when using the rowing machine, and the numerical value of the energy consumed by the user in the movement process acquired by the rowing machine is more accurate.

As shown in fig. 2, in an embodiment of the present disclosure, the energy conversion module 1 is a dc generator 11, the energy storage module 2 is a battery 21, and the control module 3 includes a control unit 31, where the control unit 31 is configured to be powered by at least one of the dc generator 11 or the battery 21, and control the current output by the dc generator 11 to be constant.

Since the torque of the dc generator 11 is the product of the torque constant and the current value of the dc generator 11 under the constant current condition, the dc generator 11 can maintain a constant torque by controlling the current in the control circuit to be constant, and since the arm of the rotating shaft 111 does not change, the resistance provided by the dc generator 11 is also constant when the dc generator 11 maintains a constant torque. The resistance provided by the DC generator 11 is controlled to be kept constant by controlling the current output by the DC generator 11 to be constant, so that the control method of the resistance can be simpler and more convenient.

As shown in fig. 2, in an embodiment of the present disclosure, the control module 3 further includes an input unit 32, wherein the input unit 32 is configured to send a control signal to the control unit 31, the control signal includes a signal indicating the set current, and the control unit 31 is configured to control the dc generator 11 to output the set current based on the control signal.

Specifically, the input unit 32 may be connected to an operation panel of the rowing machine, and the user may output a corresponding control signal by adjusting a resistance option on the panel, and then the input unit 32 may output the corresponding control signal by the resistance option selected by the user, where the control signal includes a signal indicating a set current corresponding to the resistance option; when the user selects different resistance options, the corresponding set current will also change.

The control unit 31 can control the dc generator 11 to output the set current based on the control signal. Specifically, the control unit 31 may obtain an actual current output by the dc generator 11; when the dc generator 11 is not connected to the load or the load resistance is low, the actual current output by the dc generator 11 is usually much larger than the set current. At this time, the control unit 31 may control the dc generator 11 to be connected to the load, so that the actual current output by the dc generator 11 is reduced until the set current is reached; when the set current is lower than the set current, the load of the dc generator 11 is reduced, so that the control unit 31 dynamically controls the dc generator 11 to output the set current.

Therefore, after the input unit outputs a signal indicating the set current corresponding to the resistance option according to the resistance option selected by the user, the control unit can control the dc generator 11 to provide the resistance corresponding to the resistance option when the dc generator 11 outputs the set current corresponding to the resistance option based on the control signal, thereby meeting the requirement of the user for adjusting different resistances.

In one embodiment of the present disclosure, the input unit 32 and the control unit 31 may be different components of the same control element, and in another embodiment of the present disclosure, the input unit 32 and the control unit 31 may also be independent control elements. The identification of the control module 3 in fig. 3 and 4 is only schematic and does not represent all cases.

In one embodiment of the present disclosure, the resistance providing device for a rowing machine of the present disclosure further includes a brake resistor 4, the brake resistor 4 and the battery 21 being configured to switch between a state of being on or off with the dc generator 11; the control unit 31 is configured to control at least one of the battery 21 and the brake resistor 4 to be connected to the dc generator 11 to control the current output by the dc generator 11 to be reduced to the set current when detecting that the real-time current output by the dc generator 11 is greater than the set current.

As mentioned above, when the dc generator 11 does not turn on the load or the load resistance is low, the actual current output by the dc generator 11 is usually much larger than the set current. At this time, the control unit 31 may control the dc generator 11 to be connected to at least one of the battery 21 and the braking resistor 4, so that the actual current output by the dc generator 11 is reduced until the set current is reached; when the set current is lower than the set current, the number or frequency of the batteries 21 or the braking resistors 4 which are switched on by the direct current generator 11 is reduced, so that the aim of dynamically controlling the direct current generator 11 to output the set current by the control unit 31 through controlling the braking resistors 4 and the batteries 21 is achieved.

In one embodiment of the present disclosure, the control unit 31 is configured to control the braking resistor 4 to be connected to the dc generator 11 to control the current output by the dc generator 11 to be reduced to the set current when it is detected that the battery 21 is fully charged and the real-time current is greater than the set current. Specifically, when the battery 21 is not fully charged, the battery 21 may be preferentially connected to the dc generator 11; when the battery 21 is fully charged, the current output from the dc generator 11 is reduced by the braking resistor 4 so that the current output from the dc generator 11 is controlled to be constant at the set current. This prevents the battery 21 from being overcharged, thereby extending the service life of the battery 21.

Since the input unit 32 needs to monitor the operation of the user on the operation panel in real time, and the control unit 31 only needs to provide resistance when the dc generator 11 generates power, in one embodiment of the present disclosure, the input unit 32 is configured to be powered by the battery 21, and the control unit 31 is configured to be powered by the dc generator 11.

Thus, in the using process of the resistance providing device for the rowing machine, the input unit 32 can be ensured to be kept in a normally open state, so that the operation of a user on the operation panel can be monitored in real time; the control unit 31 is driven by the direct current generator 11, and does not need to be kept in a normally open state, so that part of energy is saved.

As shown in fig. 3 and 4, in an embodiment of the present disclosure, the dc generator 11 may also be connected to the bus capacitor 5, and the bus capacitor 5 is used to temporarily store electric energy of the dc generator 11, and may also limit a rapid change in current caused by a rapid change in output voltage of the dc generator 11, so as to reduce difficulty in controlling the dc generator 11 to output a set current.

As shown in fig. 3 and 4, in one embodiment of the present disclosure, the resistance providing device for a rowing machine of the present disclosure further includes a frame 6 and a first transmission mechanism 7. The direct current generator 11, the battery 21 and the control module 3 are all arranged on the frame 6; the first transmission mechanism 7 is configured to drive the rotation shaft 111 of the dc generator 11 to rotate when being subjected to an applied tensile force. Specifically, as shown in fig. 4 to 6, the first transmission mechanism 7 may be fixed on a first fixing plate 61 of the frame 6; when the resistance providing device for the rowing machine of the present disclosure further includes the bus capacitor 5, the bus capacitor 5 may also be fixed on the third fixing plate 63 of the frame 6.

Through setting up first drive mechanism 7, can be effectual convert external pulling force into drive DC generator 11 pivoted torsion to when making this disclosed resistance providing device for rowing machine be applied to rowing machine, the user can be through providing pulling force drive DC generator 11 electricity generation, thereby realizes the conversion of energy very conveniently.

As shown in fig. 5 and 6, in one embodiment of the present disclosure, the first transmission mechanism 7 includes a coil spring 71, and the coil spring 71 is configured to be extended by an external tensile force or retracted by its own elastic force; the first transmission mechanism 7 is configured to drive the rotation shaft 111 of the dc generator 11 to rotate when the coil spring 71 is elongated by an applied tensile force. Specifically, in order to facilitate the user to pull the coil spring 71, a pull cord 72 may be further provided at the end of the coil spring 71, so that the user may indirectly pull the coil spring 71 by pulling the pull cord 72.

That is, the resistance providing device for the rowing machine of the present disclosure, when applied to the rowing machine, can drive the rotating shaft 111 of the dc generator 11 to rotate and generate electricity when the user pulls the coil spring 71; after the coil spring 71 is not extended and retracted any more, the direct current generator 11 will stop rotating rapidly under the action of the magnetic resistance provided by the winding, and the coil spring 71 will not drive the rotating shaft 111 of the direct current generator 11 to rotate reversely when retracting, so that the coil spring 71 will not be subjected to resistance when retracting, the coil spring 71 can be ensured to be retracted completely, and the change of the stroke of each pulling of a user is avoided.

As shown in fig. 5-7, in one embodiment of the present disclosure, first transmission 7 further includes a wrap spring mounting pulley 73 and a wrap spring pulley 74. Wherein, the coil spring mounting wheel 73 is rotatably arranged on the frame 6, and the coil spring 71 surrounds the coil spring mounting wheel 73 and is configured to drive the coil spring mounting wheel 73 to rotate; the coil spring pulley 74 and the rotating shaft 111 of the dc generator 11 are mutually driven, a one-way bearing 75 is arranged between the coil spring pulley 74 and the coil spring mounting pulley 73, and the coil spring mounting pulley 73 is configured to drive the coil spring pulley 74 to rotate when the coil spring 71 is extended through the one-way bearing 75.

Thus, by providing the one-way bearing 75, when the user pulls the coil spring 71, the coil spring mounting wheel 73 can drive the coil spring pulley 74 to rotate in the forward direction, and further drive the rotating shaft 111 of the dc generator 11 to rotate; during the retraction of the coil spring 71, the coil spring mounting pulley 73 will not rotate the coil spring pulley 74 in the reverse direction, and will not rotate the rotating shaft 111 of the dc generator 11 in the reverse direction.

As shown in fig. 3, in one embodiment of the present disclosure, the resistance providing device for a rowing machine of the present disclosure further includes a second transmission 8. The first transmission mechanism 7 is configured to drive the rotating shaft 111 of the direct current generator 11 to rotate through the second transmission mechanism 8, and the transmission ratio of the second transmission mechanism 8 is less than 1.

Through setting up second drive mechanism 8, not only can play the transmission effect, can also enlarge the arm of force for the slew velocity of dc generator 11's pivot 111 can increase by the multiple for the slew velocity of wind spring installation wheel 73, thereby improves dc generator 11's generated power.

As shown in fig. 5, 6, 8, and 9, in one embodiment of the present disclosure, the second transmission mechanism 8 includes a first pulley 81, a second pulley 82, a first belt 83, and a first belt 83. The first pulley 81 and the second pulley 82 are rotatably disposed on the frame 6 and are fixedly connected to each other. In particular, both may be fixed to the same shaft and bearings 85 may be provided on the shaft to enable both to rotate on the frame 6.

One end of the first belt 83 is sleeved on the coil spring belt pulley 74, and the other end is sleeved on the first belt pulley 81; one end of the second belt 84 is sleeved on the second belt pulley 82, and the other end is sleeved on the rotating shaft 111 of the dc generator 11; wherein the diameter of the coil spring pulley 74 is larger than that of the first pulley 81, and the diameter of the second pulley 82 is larger than that of the rotating shaft 111 of the dc generator 11. Thus, the transmission ratio between the coil spring pulley 74 and the first pulley 81 is greater than 1, and the transmission ratio between the second pulley 82 and the rotating shaft 111 of the dc generator 11 can also be greater than 1, so that the gradual amplification of the moment arm can be realized, and the amplification effect of the second transmission mechanism 8 can be improved.

As shown in fig. 5, the resistance providing device for a rowing machine of the present disclosure further includes a pressing mechanism 9, wherein the pressing mechanism 9 is provided on the frame 6, and includes a rotating member 91, a pressing wheel 92, and a pressing spring 93; the rotating member 91 is rotatably provided on the frame 6; the pinch roller 92 is rotatably provided on the rotating member 91; and a pressing spring 93, a first end of the pressing spring 93 being fixedly provided on the frame 6, and the other end being fixedly provided on the rotating member 91, the pressing spring 93 being configured to make the pressing wheel 92 abut the first belt 83 or the second belt 84. In fig. 5, the pressing wheel 92 is attached to the first belt 83, and in another embodiment of the present disclosure, the pressing wheel 92 may also be attached to the second belt 84, or two pressing mechanisms 9 are provided, so that the pressing wheels 92 of the two pressing mechanisms 9 are attached to the first belt 83 and the second belt 84, respectively.

By providing the pressing mechanism 9, the conveyor belt can be kept in good contact with the pulley, the first belt 83 or the second belt 84 is prevented from slipping, and the pressing wheel 92 can rotate, so that the normal rotation of the first belt 83 or the second belt 84 is not affected by the pressing wheel 92.

As shown in fig. 5, in one embodiment of the present disclosure, the pressing spring 93 and the pressing wheel 92 are provided on both sides of the rotational axis of the rotational member 91. Thus, the pressing spring 93 is not easy to influence the arrangement of the first belt 83 or the second belt 84, and the arrangement difficulty of the pressing spring 93 is reduced.

According to a second aspect of the present disclosure, there is also provided a rowing machine including a machine body and a resistance providing device for the rowing machine, the resistance providing device for the rowing machine being provided on the machine body, the energy conversion module 1 being configured to be driven under a pulling force of a user.

The control module 3 of the resistance providing device for the rowing machine is driven by at least one of the energy conversion module 1 or the energy storage module 2, so that external power supply is not needed, and the rowing machine can be placed freely without limitation; and the control module 3 can control the resistance provided by the energy conversion module 1 to keep constant, so that a user can receive uniform resistance when using the rowing machine, and the numerical value of the energy consumed by the user in the movement process acquired by the rowing machine is more accurate.

The foregoing description of the embodiments of the present disclosure has been presented for purposes of illustration and description, but is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or technical improvements to the market, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein. The scope of the present disclosure is defined by the appended claims.

Claims

1. A resistance providing device for a rowing machine, comprising:

an energy conversion module (1), wherein the energy conversion module (1) is configured to be driven under the action of external force to convert mechanical energy into electric energy and provide resistance to the external force;

an energy storage module (2), the energy storage module (2) being configured to store electrical energy generated by the energy conversion module (1);

a control module (3), the control module (3) being configured to be driven by at least one of the energy conversion module (1) or the energy storage module (2) and to control the resistance provided by the energy conversion module (1) to remain constant.

2. The resistance providing device for a rowing machine according to claim 1, wherein the energy conversion module (1) is a direct current generator (11), and the energy storage module (2) is a battery (21);

the control module (3) comprises a control unit (31), wherein the control unit (31) is configured to be powered by at least one of the direct current generator (11) or the battery (21) and control the current output by the direct current generator (11) to be constant.

3. The resistance providing device for a rowing machine according to claim 2, wherein the control module (3) further includes an input unit (32);

the input unit (32) is configured to send a control signal to the control unit (31), the control signal comprising a signal indicative of a set current;

the control unit (31) is configured to control the direct current generator (11) to output the set current based on the control signal.

4. The resistance providing device for a rowing machine according to claim 3, further comprising a brake resistor (4), the brake resistor (4) and the battery (21) being configured to switch between a state of being on or off with the DC generator (11);

the control unit (31) is configured to control at least one of the battery (21) and the brake resistor (4) to be connected with the direct current generator (11) to control the current output by the direct current generator (11) to be reduced to the set current when detecting that the real-time current output by the direct current generator (11) is larger than the set current.

5. The resistance providing device for a rowing machine according to claim 4, wherein the control unit (31) is configured to control the brake resistor (4) to be turned on with the DC generator (11) to control the current output from the DC generator (11) to be reduced to the set current in a case where it is detected that the battery (21) is fully charged and the real-time current is greater than the set current.

6. The resistance providing device for a rowing machine according to claim 3, wherein the input unit (32) is configured to be powered by the battery (21);

the control unit (31) is configured to be powered by the direct current generator (11).

7. The resistance providing device for a rowing machine according to claim 2, further comprising:

the direct current generator (11), the battery (21) and the control module (3) are all arranged on the rack (6);

a first transmission mechanism (7), wherein the first transmission mechanism (7) is configured to drive the rotating shaft (111) of the direct current generator (11) to rotate under the condition of applied tension.

8. The resistance providing apparatus for a rowing machine according to claim 7, wherein the first transmission mechanism (7) includes a coil spring (71), the coil spring (71) being configured to be extended by an applied tensile force or retracted by its own elastic force;

the first transmission mechanism (7) is configured to drive the rotating shaft (111) of the direct current generator (11) to rotate under the condition that the coil spring (71) stretches under the action of applied tension.

9. The resistance providing device for a rowing machine according to claim 8, wherein the first transmission mechanism (7) further comprises:

a coil spring mounting wheel (73), wherein the coil spring mounting wheel (73) is rotatably arranged on the frame (6), and the coil spring (71) surrounds the coil spring mounting wheel (73) and is configured to drive the coil spring mounting wheel (73) to rotate;

the direct current generator (11) comprises a coil spring pulley (74), the coil spring pulley (74) and a rotating shaft (111) of the direct current generator (11) are mutually driven, a one-way bearing (75) is arranged between the coil spring pulley (74) and the coil spring mounting wheel (73), and the coil spring mounting wheel (73) is configured to drive the coil spring pulley (74) to rotate when the coil spring (71) extends through the one-way bearing (75).

10. The resistance providing device for a rowing machine according to claim 9, further comprising:

a second transmission mechanism (8), wherein the first transmission mechanism (7) is configured to drive the rotating shaft (111) of the direct current generator (11) to rotate through the second transmission mechanism (8), and the transmission ratio of the second transmission mechanism (8) is less than 1.

11. The resistance providing device for a rowing machine according to claim 10, wherein the second transmission mechanism (8) comprises:

a first pulley (81), the first pulley (81) being rotatably arranged on the frame (6);

the second belt pulley (82) is rotatably arranged on the rack (6), and the second belt pulley (82) is fixedly connected with the first belt pulley (81);

one end of the first belt (83) is sleeved on the coil spring belt pulley (74), and the other end of the first belt (83) is sleeved on the first belt pulley (81);

one end of the second belt (84) is sleeved on the second belt wheel (82), and the other end of the second belt (84) is sleeved on a rotating shaft (111) of the direct current generator (11);

wherein the diameter of the coil spring pulley (74) is larger than that of the first pulley (81), and the diameter of the second pulley (82) is larger than that of a rotating shaft (111) of the direct current generator (11).

12. The resistance providing device for a rowing machine according to claim 11, further comprising:

hold-down mechanism (9), hold-down mechanism (9) set up in on frame (6), include:

a rotating member (91), the rotating member (91) being rotatably provided on the frame (6);

a pinch roller (92), the pinch roller (92) being rotatably provided on the rotation member (91);

a compression spring (93), a first end of the compression spring (93) is fixedly arranged on the frame (6), the other end of the compression spring is fixedly arranged on the rotating piece (91), and the compression spring (93) is configured to enable the compression wheel (92) to be attached to the first belt (83) or the second belt (84).

13. The resistance force providing device for a rowing machine according to claim 12, wherein the pressing spring (93) and the pressing wheel (92) are provided on both sides of a rotation axis of the rotation member (91).

14. A rowing machine, comprising:

a body;

the resistance force providing device for a rowing machine of any one of claims 1 to 13, which is provided on the body, the energy conversion module (1) being configured to be driven under a pulling force of a user.