GB2541481A

GB2541481A - Damping device for exercise equipment

Info

Publication number: GB2541481A
Application number: GB1604122.0A
Authority: GB
Inventors: Hsu Chih-Yung
Original assignee: Great Fitness Industrial Co Ltd
Current assignee: Great Fitness Industrial Co Ltd
Priority date: 2015-08-19
Filing date: 2016-03-10
Publication date: 2017-02-22
Anticipated expiration: 2036-03-10
Also published as: TWM519973U; GB2541481B; GB201604122D0

Abstract

A damping device for exercise equipment includes a transmission unit 6, a pulling unit 7, and a resistance unit 8. The transmission unit 6 includes a driving shaft (61, fig.4), a transmission wheel (62, fig.4) provided at a centre of the driving shaft, and first and second rotating wheels (63, 64, fig.4) respectively provided at two opposite ends of the driving shaft. The resistance unit 8 includes a resistance fan (81, fig.4) and an adjustable resistance member (9, fig.4) which are respectively provided on the outer sides of the first and second rotating wheels so as to structurally achieve overall weight balance. The adjustable resistance member preferably includes magnetically attractive members (919, fig.6) adjustably positioned relative to a stationary ring (912, fig.6) on the housing of the resistance member. A motor may also be provided comprising a plurality of coil assemblies (914, fig.6) and magnetic plates (913, fig.6)

Description

DAMPING DEVICE FOR EXERCISE EQUIPMENT

BACKGROUND OF THE INVENTION

[0001] 1. Technical Field [0002] The present invention relates to a damping device and more particularly to a damping device for use with exercise equipment.

[0003] 2. Description of Related Art [0004] Recently, due to the increasing popularity of physical exercise, the market has been supplied with a variety of exercise equipment for indoor use, such as treadmills, weight machines, stationary bicycles, and rowing machines. Such equipment allows users to train themselves physically indoors, regardless of weather conditions.

[0005] Take rowing machines for example. The main structure of early rowing machines includes a base, a slide rail provided on the base, a seat assembly slidably provided on the slide rail, a footrest assembly which is provided at one end of the base and on which the user can place his or her feet, and a handle assembly which is provided on the base and on two lateral sides of the seat assembly and with which the user can perform rowing actions. To operate such a rowing machine, the user presses his or her feet against the footrest assembly, holds the handle assembly with both hands, pulls the handle assembly toward the user’s body, and then allows the handle assembly to return to its starting position under the user’s control. The handle assembly is operated repeatedly in a way similar to rowing a boat. Meanwhile, the seat assembly is driven to glide back and forth along the slide rail. This exercise is intended mainly to train the muscles in the arms, legs, chest, waist, and back through simulated rowing actions.

[0006] To enhance the functionality of rowing machines, various improvements in design have been proposed, one example of which is Taiwan Patent No. 1249416, entitled “IMPROVED VANE STRUCTURE FOR MAGNETICALLY CONTROLLED WHEEL”, in which an exercise machine has a frame pivotally provided with a reeling wheel and a magnetically controlled wheel in driving connection with the reeling wheel. The reeling wheel is provided therein with a one-way bearing so as to serve as a wheel component capable of reeling by rotation in one direction. The shaft of the reeling wheel is provided with a belt winding portion and a looping portion adjacent to the belt winding portion. A woven belt has one end fixed to and wound around the belt winding portion and the opposite end connected to a handle to be held by the user. A transmission belt has one end looped around the looping portion and the opposite end corresponding to, and looped around the shaft of, the magnetically controlled wheel. In addition, a vane wheel is locked to a lateral side of the magnetically controlled wheel, and the rotation path of the vanes of the vane wheel is spaced from the rim of the magnetically controlled wheel. This spaced-apart structural arrangement and the air inlet space at the bottom of each vane can, based on the principles of hydromechanics, jointly form an airflow guiding passage when subjected to the centrifugal force and pressure difference generated by rotation of the vane wheel along with the magnetically controlled wheel. As a result, wind resistance is effectively produced to enhance the damping effect of the magnetically controlled wheel. It is this damping effect that enables the user’s physical training.

[0007] According to the foregoing improved vane structure for a magnetically controlled wheel, a user can hold the handle and move the handle back and forth to rotate the reeling wheel via the woven belt. In the meantime, the magnetically controlled wheel and the vane wheel are driven into simultaneous rotation by the transmission belt. Since the transmission belt drives the magnetically controlled wheel and the vane wheel by primary transmission, the resistance generated is limited, and so is the training effect.

BRIEF SUMMARY OF THE INVENTION

[0008] It is an objective of the present invention to provide a damping device for exercise equipment, wherein the damping device is evenly weighted and can offer uniform, adjustable resistance to meet the training needs of users of different physical strengths and provide effective training.

[0009] According to an aspect of the present invention, a damping device for exercise equipment having a frame unit to be set up on the ground includes a transmission unit, a pulling unit, and a resistance unit.

[0010] The transmission unit is provided at one end of the frame unit and includes a driving shaft, a transmission wheel provided at the center of the driving shaft, a first rotating wheel pivotally provided at one end of the driving shaft, a second rotating wheel pivotally provided at the other end of the driving shaft, a woven belt whose one end is positioned on the transmission wheel and which is wound around the transmission wheel, a first transmission belt, and a second transmission belt. The first rotating wheel and the second rotating wheel are located on two opposite sides of the transmission wheel respectively.

[0011] The pulling unit has a handle. The other end of the woven belt of the transmission unit is connected to a middle section of the handle. When pulled in either of two predetermined opposite directions, the handle drives the transmission wheel and the driving shaft into rotation and thus rotates the first rotating wheel and the second rotating wheel via the driving shaft.

[0012] The resistance unit includes a resistance fan and an adjustable resistance member. The resistance fan is provided at the foresaid end of the frame unit and is located on the lower outer side of the first rotating wheel. The adjustable resistance member is also provided at the aforesaid end of the frame unit and is located on the lower outer side of the second rotating wheel. The resistance fan has a fan wheel and a rotating shaft provided at the fan wheel and connected to the frame unit. The adjustable resistance member has a resistance generating body connected to the frame unit and a main shaft protrudingly provided at the resistance generating body. The first transmission belt of the transmission unit is connected between the first rotating wheel and the rotating shaft of the resistance fan. The second transmission belt of the transmission unit is connected between the second rotating wheel and the main shaft of the adjustable resistance member. When the first rotating wheel and the second rotating wheel are rotated, they rotate the rotating shaft and the main shaft via the first transmission belt and the second transmission belt respectively, thereby driving the fan wheel to rotate and the resistance generating body of the adjustable resistance member to output resistance respectively.

[0013] The technical features described above produce the following effects: [0014] The entire structure of the damping device is evenly weighted due to the fact that the transmission wheel of the transmission unit is provided at the center of the driving shaft, that the first and second rotating wheels are provided respectively at the two ends of the driving shaft and on two opposites sides of the transmission wheel, that the resistance fan of the resistance unit is arranged on the lower outer side of the first rotating wheel, and that the adjustable resistance member of the resistance unit is arranged on the lower outer side of the second rotating wheel. Moreover, the first and second rotating wheels are simultaneously rotated via the woven belt, the transmission wheel, and the driving shaft when the pulling unit is pulled (either by the user or by the transmission wheel), in order for the fan wheel to rotate and the adjustable resistance member to output uniform and adjustable resistance. Thus, the damping device can satisfy the training needs of users of different physical strengths and help train the users more effectively than its prior art counterparts.

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

[0015] FIG. 1 is a perspective view of the damping device for exercise equipment in the first embodiment of the present invention; [0016] FIG. 2 is another perspective view of the damping device in FIG. 1, taken from a different angle to assist FIG. 1 in illustration; [0017] FIG. 3 is a partial exploded perspective view of the damping device in FIG. i; [0018] FlG. 4 is a partial assembled perspective view of the damping device in FIG. 1; [0019] FIG. 5 is a front view of the damping device in FIG. 1 to assist FIG. 4 in illustration; [0020] FIG. 6 shows the resistance generating body of the adjustable resistance member in the first embodiment of the present invention, along with a man-machine interface unit, a motor, and an electricity storage unit; [0021] FIG. 7 shows how the distance between the plural magnetically attractive members on the outer side of the base plate and the stationary ring in the first embodiment of the present invention is increased by tightening the pulling cord; and [0022] FIG. 8 is a partial view of the damping device for exercise equipment in the second embodiment of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

[0023] The foregoing and other features and effects of the present invention are clearly presented below with reference to some illustrative embodiments as shown in the accompanying drawings. In the following description, similar components are identified by the same reference numeral.

[0024] Refer to FIG. 1, FIG. 2, and FIG. 3 for the damping device for exercise equipment in the first embodiment of the present invention. In this embodiment, the exercise equipment is a rowing machine by way of example only. The exercise equipment includes a frame unit 1 to be set up on the ground, a user supporting unit 2, a man-machine interface unit 3 provided on the frame unit 1, a motor 4 (see FIG. 6), and an electricity storage unit 5 (see FIG. 6) electrically connected to the motor 4, wherein the motor 4 has an output portion (not shown). The frame unit 1 includes a slide rail assembly 11, a positioning frame 12 provided at one end of the slide rail assembly 11, two spaced-apart supporting legs 13 provided at the other end of the slide rail assembly 11, two spaced-apart castors 14 provided at a lower edge of the positioning frame 12, two housing portions 15 configured to join together to enclose the positioning frame 12, two air inflow gratings 16 provided respectively at the housing portions 15, an air outflow grating 17 provided at one of the housing portions 15 and facing the user supporting unit 2, and a front cover 18 connected between the housing portions 15. The user supporting unit 2 includes a seat 21 provided on and slidable with respect to the slide rail assembly 11 and footrest plates 22 provided on the slide rail assembly 11 and adjacent to the positioning frame 12. The man-machine interface unit 3 is connected to the positioning frame 12 and lies above the damping device. The man-machine interface unit 3 has a display screen 31 and a plurality of operating keys 32 provided beside the display screen 31 and configured for operation for user input. The man-machine interface unit 3 may further have a built-in automatic mode and non-automatic mode, and mode selection is made by operating the appropriate operating key(s) 32. In the automatic mode, the user can set a resistance value (i.e., the magnitude of resistance output from the damping device) by operating the appropriate operating key(s) 32. In the non-automatic mode, the magnitude of resistance output from the damping device depends on the pulling force applied by the user. It should be pointed out that the configuration of the man-machine interface unit 3 is not limited to that disclosed herein. For example, the man-machine interface unit 3 can be a touch screen so that the user only has to touch the option fields on the touch screen to input operation commands.

[0025] Referring to FIG. 3, FIG. 4, and FIG. 5, the damping device includes a transmission unit 6, a pulling unit 7, and a resistance unit 8. The transmission unit 6 includes a driving shaft 61 provided on the positioning frame 12, a transmission wheel 62 provided at the center of the driving shaft 61, a first rotating wheel 63 pivotally provided at one end of the driving shaft 61, a second rotating wheel 64 pivotally provided at the opposite end of the driving shaft 61, a woven belt 65 which has one end positioned on the transmission wheel 62 and is wound around the transmission wheel 62, a first transmission belt 66, and a second transmission belt 67. The first rotating wheel 63 and the second rotating wheel 64 are located on two opposite sides of the transmission wheel 62 respectively.

[0026] The pulling unit 7 has a base 71 and a handle 72 extending through the base 71. The other end of the woven belt 65 of the transmission unit 6 is connected to a middle section of the handle 72. The handle 72 pulls the woven belt 65 when pulled by the user sitting on the user supporting unit 2, and allows the woven belt 65 to rewind around the transmission wheel 62 when pulled by the transmission wheel 62 in the opposite direction. In either case, the handle 72 drives the transmission wheel 62 into rotation.

[0027] With continued reference to FIG. 3, FIG. 4, and FIG. 5, the resistance unit 8 includes a resistance fan 81 on the lower outer side of the first rotating wheel 63 and an adjustable resistance member 9 on the lower outer side of the second rotating wheel 64. The resistance fan 81 has a fan wheel 811 and a rotating shaft 812 provided at the fan wheel 811 and connected to the frame unit 1. The fan wheel 811 has a hub, a plurality of spokes 813 extending radially from the hub, and a plurality of resistance plates 814 provided between the spokes 813. The rotating shaft 812 extends through the hub, has two ends pivotally provided at the positioning frame 12, and is configured to rotate with respect to the positioning frame 12 and thereby rotate the fan wheel 811.

[0028] Referring to FIG. 5 and FIG. 6, the adjustable resistance member 9 has a resistance generating body 91 connected to the frame unit 1 and a main shaft 92 protrudingly provided at the resistance generating body 91. The resistance generating body 91 includes a hollow housing 911 rotatably provided at the main shaft 92, a stationary ring 912 provided in the hollow housing 911, a plurality of magnetic plates 913 arranged in an annular manner in the hollow housing 911 and spaced from the stationary ring 912, a plurality of coil assemblies 914 arranged in an annular manner on the inner side of the magnetic plates 913 and surrounding the outer periphery of the main shaft 92, a lateral connecting frame 915, an actuator 916, a position restoring member 917, a pulling cord 918 having one end connected to the output portion (not shown) of the motor 4, and at least one magnetically attractive member 919.

[0029] The hollow housing 911 has a central wall 9111; an outer annular wall 9112 provided on the central wall 9111; an inner annular wall 9113 provided on the central wall 9111 and spaced from the outer annular wall 9112; an outer annular groove 9114 defined jointly by the central wall 9111, the inner annular wall 9113, and the outer annular wall 9112; an inner annular groove 9115 defined jointly by the central wall 9111 and the inner annular wall 9113; a shaft tube 9116 provided on the central wall 9111, located in the inner annular groove 9115, and configured to be penetrated by the main shaft 92; and a plurality of spaced-apart heat dissipation holes 9117 provided in the central wall 9111 and located in the outer annular groove 9114. The stationary ring 912 is provided in the outer annular groove 9114 of the hollow housing 911 and is in contact with the inner surface of the outer annular wall 9112. The magnetic plates 913 are provided in the inner annular groove 9115 of the hollow housing 911 and are in contact with the inner surface of the inner annular wall 9113. The coil assemblies 914 are arranged in an annular manner between the shaft tube 9116 and the inner surface of the inner annular wall 9113 and surround the outer periphery of the main shaft 92. The lateral connecting frame 915 has a stationary portion 9151 fixedly provided on the shaft tube 9116 and a joining portion 9152 extending from the stationary portion 9151 and having a fan-shaped configuration. The actuator 916 has a base plate 9161, a positioning portion 9162 provided at one end of the base plate 9161 and connected with the other end of the pulling cord 918, a connecting portion 9163 provided at the other end of the base plate 9161 and fixedly provided at the joining portion 9152 of the lateral connecting frame 915, and a position limiting portion 9164 provided at the base plate 9161 and between the positioning portion 9162 and the connecting portion 9163. The position restoring member 917 is connected between the joining portion 9152 and the base plate 9161 and is located on the inner side of the position limiting portion 9164. The at least one magnetically attractive member 919 is provided on the outer side of the base plate 9161 and faces the stationary ring 912. In this embodiment, there are a plurality of magnetically attractive members 919 by way of example only; it is feasible that only one magnetically attractive member 919 is provided, in the form of a curved plate. By rotation of the motor 4, the tautness of the pulling cord 918 can be controlled so as to displace the base plate 9161 toward or away from the stationary ring 912, thereby changing the distance between the magnetically attractive members 919 and the stationary ring 912 to adjust the damping effect produced.

[0030] As shown in FIG. 5, FIG. 6, and FIG. 7, the coil assemblies 914 are electrically connected to the electricity storage unit 5, and the motor 4 is electrically connected to the man-machine interface unit 3. The user can input operation commands through the operating keys 32, and once all the required selections and settings are made, the motor 4 can be started to control the tautness of the pulling cord 918. In FIG. 7, the pulling cord 918 is tightened such that the base plate 9161 is displaced away from the stationary ring 912. As a result, the distance between the magnetically attractive members 919 and the stationary ring 912 is increased, and the damping effect, reduced. The position restoring member 917 is now in the compressed state and stores a restoring force. When the pulling cord 918 is loosened, the base plate 9161 is displaced toward the stationary ring 912 to shorten the distance between the magnetically attractive members 919 and the stationary ring 912 and thus increase the damping effect. More specifically, the base plate 9161 is displaced toward the stationary ring 912 or even brought back to its original position by the position restoring member 917, which releases the previously stored restoring force.

[0031] With continued reference to FIG.4, FIG. 5, FIG. 6, and FIG. 7, the first transmission belt 66 of the transmission unit 6 is connected between the first rotating wheel 63 and the rotating shaft 812 of the resistance fan 81 while the second transmission belt 67 of the transmission unit 6 is connected between the second rotating wheel 64 and the main shaft 92 of the adjustable resistance member 9. To use the exercise equipment, the user holds the handle 72 and alternates between pulling the handle 72 and allowing the handle 72 to return to its original position in a controlled manner, thereby unreeling the woven belt 65 and rewinding the woven belt 65 around the transmission wheel 62 repeatedly. By doing so, the user rotates the transmission wheel 62 such that the first rotating wheel 63 and the second rotating wheel 64 are rotated by the same driving shaft 61. In turn, the first transmission belt 66 and the second transmission belt 67 are driven, and the displacements of the transmission belts 66 and 67 drive the rotating shaft 812 of the resistance fan 81 and the main shaft 92 of the adjustable resistance member 9 to rotate respectively. The fan wheel 811 of the resistance fan 81 is thus rotated to draw air through the air inflow gratings 16 into the space enclosed by the housing portions 15 and the front cover 18. The air is then output through the air outflow grating 17 and blown to the user (see FIG. 1 and FIG. 2 for the air inflow gratings 16, the air outflow grating 17, the housing portions 15, and the front cover 18). As such, the damping device not only provides auxiliary resistance while the user is doing exercise, but also generates an airflow that simulates an outdoor breeze for increased comfort during the exercise. In addition, as the main shaft 92 rotates, the hollow housing 911 of the resistance generating body 91 is driven into rotation by the main shaft 92, causing the magnetic plates 913 to rotate along with the hollow housing 911 with respect to the coil assemblies 914. In consequence, the coil assemblies 914 generate electricity, or more specifically an induced current, due to variations in magnetic flux. The electricity can be supplied to the man-machine interface unit 3 or the display screen 31 (see FIG. 2) and be used to charge the electricity storage unit 5 in order for the electricity storage unit 5 to supply the motor 4 with the electricity required for operation.

[0032] FIG. 8 shows the damping device for exercise equipment in the second embodiment of the present invention. The second embodiment is the same as the first embodiment except that the magnetically attractive members 919 (see FIG. 7) of the adjustable resistance member 9 are dispensed with. In the second embodiment, the damping effect is produced by direct contact, and hence friction, between the outer surface of the base plate 9161 and the inner surface of the stationary ring 912.

[0033] In summary of the above, the damping device for exercise equipment according to the present invention is so designed that the transmission wheel 62 of the transmission unit 6 is provided at the center of the driving shaft 61, that the first rotating wheel 63 and the second rotating wheel 64 are respectively provided at the two ends of the driving shaft 61 and on two opposite sides of the transmission wheel 62, and that the resistance fan 81 and the adjustable resistance member 9 of the resistance unit 8 are arranged on the lower outer side of the first rotating wheel 63 and the lower outer side of the second rotating wheel 64 respectively. The foregoing arrangement not only gives the damping device an evenly weighted overall structure, but also enables the fan wheel 811 and the adjustable resistance member 9, which are respectively driven by the first rotating wheel 63 and the second rotating wheel 64, to rotate and to output uniform and adjustable resistance respectively when the pulling unit 7 is repeatedly pulled in two opposite directions and thereby rotates the first rotating wheel 63 and the second rotating wheel 64 via the woven belt 65, the transmission wheel 62, and the driving shaft 61. It is worth mentioning that the present invention applies the principle of secondary transmission, and that secondary transmission results in greater resistance and consequently better training effect than primary transmission, which is typically used in the prior art. The present invention can therefore satisfy the training needs of users of different physical strengths and provide more effective training.

[0034] The embodiments described above should be able to enable a full understanding of the operation, use, and effects of the present invention. Those embodiments, however, are only some preferred ones of the invention and are not intended to be restrictive of the scope of the invention. All simple, equivalent changes and modifications made according to the appended claims and the disclosure of this specification should fall within the scope of the present invention.

Claims

WHAT IS CLAIMED IS:

1. A damping device for exercise equipment comprising a frame unit to be set up on a ground, the damping device comprising: a transmission unit provided at an end of the frame unit, the transmission unit including a driving shaft, a transmission wheel provided at a center of the driving shaft, a first rotating wheel pivotally provided at an end of the driving shaft, a second rotating wheel pivotally provided at an opposite end of the driving shaft, a woven belt which has an end positioned on the transmission wheel and is wound around the transmission wheel, a first transmission belt, and a second transmission belt, wherein the first rotating wheel and the second rotating wheel are located on two opposite sides of the transmission wheel respectively; a pulling unit having a handle, the handle having a middle section connected with an opposite end of the woven belt of the transmission unit so that, when pulled in either of two predetermined opposite directions, the handle drives the transmission wheel and the driving shaft into rotation and thereby rotates the first rotating wheel and the second rotating wheel via the driving shaft; and a resistance unit including a resistance fan and an adjustable resistance member, the resistance fan being provided at the end of the frame unit and located on a lower outer side of the first rotating wheel, the adjustable resistance member being provided at the end of the frame unit and located on a lower outer side of the second rotating wheel, the resistance fan having a fan wheel and a rotating shaft, the rotating shaft provided at the fan wheel and connected to the frame unit, the adjustable resistance member having a resistance generating body and a main shaft, the resistance generating body connected to the frame unit, the main shaft protrudingly provided at the resistance generating body, the first transmission belt of the transmission unit being connected between the first rotating wheel and the rotating shaft of the resistance fan, the second transmission belt of the transmission unit being connected between the second rotating wheel and the main shaft of the adjustable resistance member, wherein, when rotated, the first rotating wheel and the second rotating wheel rotate the rotating shaft and the main shaft via the first transmission belt and the second transmission belt respectively, thereby driving the fan wheel to rotate and the resistance generating body of the adjustable resistance member to output resistance respectively.

2. The damping device of claim 1, the exercise equipment further comprising a motor, the motor having an output portion, wherein the resistance generating body includes a hollow housing rotatably provided at the main shaft, a stationary ring provided in the hollow housing, a plurality of magnetic plates annularly arranged in the hollow housing and spaced from the stationary ring, a plurality of coil assemblies annularly arranged on an inner side of the magnetic plates and surrounding an outer periphery of the main shaft, a lateral connecting frame, an actuator, a position restoring member, a pulling cord having an end connected to the output portion of the motor, and at least a magnetically attractive member; the lateral connecting frame has a stationary portion fixedly provided at the main shaft and a joining portion extending from the stationary portion and having a fan-shaped configuration; the actuator has a base plate, a positioning portion provided at an end of the base plate and connected with an opposite end of the pulling cord, a connecting portion provided at an opposite end of the base plate and fixedly provided at the joining portion of the lateral connecting frame, and a position limiting portion provided at the base plate and between the positioning portion and the connecting portion; the position restoring member is connected between the joining portion and the base plate and is located on an inner side of the position limiting portion; the magnetically attractive member is provided on an outer side of the base plate and faces the stationary ring; and by rotating the motor to control tautness of the pulling cord, the base plate is displaced toward or away from the stationary ring, thus changing a distance between the magnetically attractive member and the stationary ring to achieve damping effect adjustment.

3. The damping device of claim 2, the exercise equipment further comprising an electricity storage unit electrically connected to the motor, wherein the coil assemblies are electrically connected to the electricity storage unit so that, when the magnetic plates are rotated along with the hollow housing with respect to the coil assemblies, the coil assemblies generate electricity by producing an induced current, and the electricity generated is able to be used to charge the electricity storage unit so as to be supplied to the motor.

4. The damping device of claim 3, the frame unit including a slide rail assembly and a positioning frame provided at an end of the slide rail assembly, wherein the fan wheel of the resistance fan has a hub, a plurality of spokes extending radially from the hub, and a plurality of resistance plates provided between the spokes; and the rotating shaft extends through the hub, has two ends pivotally provided at the positioning frame, and is configured to rotate with respect to the positioning frame and thereby drive the fan wheel into rotation.

5. The damping device of claim 2, wherein the hollow housing has a central wall; an outer annular wall provided on the central wall; an inner annular wall provided on the central wall and spaced from the outer annular wall; an outer annular groove defined jointly by the central wall, the inner annular wall, and the outer annular wall; an inner annular groove defined jointly by the central wall and the inner annular wall; a shaft tube provided on the central wall, located in the inner annular groove, and configured to be penetrated by the main shaft; and a plurality of spaced-apart heat dissipation holes provided in the central wall and located in the outer annular groove; the stationary ring is provided in the outer annular groove of the hollow housing and is in contact with an inner surface of the outer annular wall; the magnetic plates are provided in the inner annular groove of the hollow housing and are in contact with an inner surface of the inner annular wall; and the coil assemblies are annularly arranged between the shaft tube and the inner surface of the inner annular wall.

6. The damping device of claim 3, wherein the hollow housing has a central wall; an outer annular wall provided on the central wall; an inner annular wall provided on the central wall and spaced from the outer annular wall; an outer annular groove defined jointly by the central wall, the inner annular wall, and the outer annular wall; an inner annular groove defined jointly by the central wall and the inner annular wall; a shaft tube provided on the central wall, located in the inner annular groove, and configured to be penetrated by the main shaft; and a plurality of spaced-apart heat dissipation holes provided in the central wall and located in the outer annular groove; the stationary ring is provided in the outer annular groove of the hollow housing and is in contact with an inner surface of the outer annular wall; the magnetic plates are provided in the inner annular groove of the hollow housing and are in contact with an inner surface of the inner annular wall; and the coil assemblies are annularly arranged between the shaft tube and the inner surface of the inner annular wall.

7. The damping device of claim 4, the exercise equipment further comprising a man-machine interface unit, the man-machine interface unit having a display screen and a plurality of operating keys provided beside the display screen and configured to be operated for user input, wherein the man-machine interface unit is connected to the positioning frame and located above the damping device, and by operating the operating keys for user input, a rotation speed of the motor and the tautness of the pulling cord are controlled to achieve damping effect adjustment.