CN111760236A - Liquid damping device for direct-drive bicycle riding platform - Google Patents
Liquid damping device for direct-drive bicycle riding platform Download PDFInfo
- Publication number
- CN111760236A CN111760236A CN201910259571.XA CN201910259571A CN111760236A CN 111760236 A CN111760236 A CN 111760236A CN 201910259571 A CN201910259571 A CN 201910259571A CN 111760236 A CN111760236 A CN 111760236A
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- Prior art keywords
- flywheel
- damping device
- liquid
- casing
- drive bicycle
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B21/00—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices
- A63B21/008—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices using hydraulic or pneumatic force-resisters
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B22/00—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements
- A63B22/06—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements with support elements performing a rotating cycling movement, i.e. a closed path movement
- A63B22/0605—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements with support elements performing a rotating cycling movement, i.e. a closed path movement performing a circular movement, e.g. ergometers
Abstract
The invention discloses a liquid damping device for a direct-drive bicycle riding platform, and relates to the technical field of physical training instruments. The damping device for the direct-drive bicycle riding platform comprises a liquid resistor for generating damping, a mechanical transmission mechanism for driving the liquid resistor and a cooling device for cooling the liquid resistor, wherein the liquid resistor for generating damping is composed of a casing, an O-shaped sealing ring, a resistance wheel shaft, an impeller, a bearing seat, a built-in flywheel, a resin plate and a fastening ring, damping oil is injected into the casing, the O-shaped sealing ring is placed in a sealing groove of the casing, and the fastening ring is connected with the casing through a bolt. The invention adopts the liquid damping technology, does not need to be connected with any power supply, has wider application places, does not have electromagnetic noise, the transmission component generating damping is sealed in a sealed oil cavity, the casing blocks the noise, is more silent, has the smooth characteristic of liquid damping, and has the inertia effect of the built-in external flywheel and the built-in flywheel, so that the riding feeling is smoother and smoother.
Description
Technical Field
The invention relates to the technical field of physical training instruments, in particular to a liquid damping device for a direct-drive bicycle riding platform.
Background
The damping technique that present direct drive formula bicycle ridden the platform is mostly electromagnetic damping device, and liquid damping technique has been utilized in the friction formula platform field of riding, but transports direct drive formula bicycle platform of riding also foreign just start, and domestic still is blank basically, and its theory of operation of electromagnetic damping device is: the damping device of the type which controls the damping by changing the electromagnetic intensity through changing the current of the electromagnetic coil has the following defects: the system is only suitable for places with power supplies and needs to consume extra energy, and the system is limited in suitable places, not low-carbon and environment-friendly; the current of a gear adjusting coil needs to be set to change the damping; the electromagnetic noise superposes itself mechanical transmission noise, and the noise is great, and the sealed position of the liquid damping device of application on the platform is generally two places to current friction formula ride: the hydraulic damping device for the direct-drive bicycle riding platform comprises a shell, a transmission shaft, a shaft extension end, a dynamic seal and a damping device, wherein the end surface of the shell is static sealed, the dynamic seal is arranged between the shaft extension end of the transmission shaft and the shell, the sealing performance of the static seal is well controlled, the dynamic seal is limited due to the existence of motion amplitude, the service life of the sealing structure is limited, the sealing parts of the hydraulic damping device are multiple, the oil leakage risk is high, the sealing durability is unreliable, and along with the continuous development of social economy, the traditional hydraulic damping device for the bicycle riding platform is more and.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides the liquid damping device for the direct-drive bicycle riding platform, which has the advantages of no need of an external power supply, good mute performance, small sealing part, low oil leakage risk, reliable sealing durability and the like, and solves the problem of common use effect of the traditional liquid damping device for the bicycle riding platform.
(II) technical scheme
In order to realize the purposes of no need of an external power supply, good mute performance, small sealing part, low oil leakage risk and reliable sealing durability, the invention provides the following technical scheme: a damping device for a direct-drive bicycle riding platform comprises a liquid resistor for generating damping, a mechanical transmission mechanism for driving the liquid resistor and a cooling device for dissipating heat of the liquid resistor, wherein a casing, an O-shaped sealing ring, a resistance wheel shaft, an impeller, a bearing seat, a built-in flywheel, a resin plate and a fastening ring form the liquid resistor for generating damping, damping oil is injected into the casing, the O-shaped sealing ring is placed in a sealing groove of the casing, the fastening ring is connected with the casing through a bolt, the fastening ring tightly presses the resin plate on the O-shaped sealing ring to form a closed oil cavity of the liquid resistor, other parts of the liquid resistor are encapsulated in the closed oil cavity, the mechanical transmission mechanism and the cooling device are all arranged outside the closed oil cavity, and a fan, a wind guide cover, a ventilation opening on the casing and a heat dissipation fin form the cooling device for dissipating heat of the liquid resistor, the internal flywheel, the external flywheel and the transmission shaft form a mechanical transmission mechanism for driving the hydraulic resistor.
Further optimize this technical scheme, a liquid damping device for directly driving formula bicycle platform of riding, the built-in flywheel that is used for mechanical transmission arranges closed oil intracavity in, external flywheel arranges outside the closed oil chamber in, is separated by the resin sheet between the two, does not have any connection, and the drive mode of hydraulic resistor is realized like this: the neodymium-iron-boron strong magnets are uniformly arranged on the corresponding end faces of the internal flywheel and the external flywheel, the N pole and the S pole of each magnet are staggered mutually, the magnets are fixed on the respective flywheel through bolts by the magnet fixing seats, the internal flywheel and the external flywheel are firmly attracted together by utilizing the physical property that the opposite poles of the magnets attract each other, the function of a contactless coupler is achieved, the transmission of power is realized, the large inertia moment can be generated by the large rotational inertia of the internal flywheel and the external flywheel, and the riding is smoother and smoother.
Further optimize this technical scheme, a hydraulic damping device for directly driving formula bicycle platform of riding, the sealed position only has a terminal surface static seal that passes through O shape sealing washer constitution between casing and the resin board, and the transmission shaft that does not have transmission power in the hydraulic resistance ware closed oil cavity stretches into, and the dynamic seal between transmission shaft and casing has not been had.
Further optimizing the technical scheme, the liquid damping device for the direct-drive bicycle riding platform is characterized in that the damping oil is silicone oil.
(III) advantageous effects
Compared with the prior art, the invention provides a liquid damping device for a direct-drive bicycle riding platform, which has the following beneficial effects:
1. the invention relates to a liquid damping device for a direct-drive bicycle riding platform, which adopts a forced air-cooling heat dissipation structure consisting of an air guide cover and a fan, wherein the fan is fixed on an external flywheel, when a transmission shaft rotates, the transmission shaft drives the external flywheel and the fan to rotate, and ambient cold air is sucked in and blown to heat dissipation fins on the outer surface of a machine shell through a fastening ring and an upper ventilation opening of the machine shell under the guidance of the air guide cover, so that the purpose of forced heat dissipation and cooling is achieved, the heat dissipation is efficient, and the service life of the device is prolonged.
2. The invention relates to a liquid damping device for a direct-drive bicycle riding platform, which adopts a liquid damping technology, does not need to be connected with any power supply, has wider application places, does not have electromagnetic noise, a transmission part for generating damping is sealed in a sealed oil cavity, a casing blocks the noise, is more silent, has the smooth characteristic of liquid damping, and has the inertia effect of an internal external flywheel and an internal flywheel, so that the riding feeling is smoother and smoother.
3. According to the hydraulic damping device for the direct-drive bicycle riding platform, the physical property that the opposite poles of the magnets attract each other is utilized, the internal flywheel and the external flywheel are firmly attracted together to play a role of a contactless coupler, the transmission of power is realized, the large inertia moment can be generated by the large rotational inertia of the internal flywheel and the external flywheel, and the riding is smoother and smoother.
Drawings
FIG. 1 is a schematic structural view of a hydraulic damping device for a direct drive bicycle riding platform of the present invention;
FIG. 2 is an exploded view of a hydraulic damping device for a direct drive bicycle riding platform of the present invention.
In the figure: 1. a housing; 1a, a first air vent; 1b, radiating fins; 2. an O-shaped sealing ring; 3. a resistance wheel axle; 4. a first screw; 5. a second screw; 6. an impeller; 7. a third screw; 8. a first bearing; 9. a spacer bush I; 10. a bearing seat; 11. a flywheel is arranged inside; 12. a magnet; 13. a magnet fixing seat; 14. a fourth screw; 15. a resin plate; 16. a fastening ring; 16a, a second air vent; 17. a fifth screw; 18. a sixth screw; 19. a gasket; 20. a nut; 21. an external flywheel; 22. a fan; 23. a seventh screw; 24. eighthly, screwing; 25. a wind scooper; 26. a second spacer sleeve; 27. a second bearing; 28. a flat bond; 29. a drive shaft; 30. drag oil.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-2, the invention discloses a liquid damping device for a direct-drive bicycle riding platform, comprising a casing 1 and a bearing seat 10, wherein the bottom of the casing 1 is fixedly connected with a resistance wheel shaft 3 through a screw I4, a spacer bush I9 is sleeved in an inner hole of the bearing seat 10, a bearing I8 is respectively pressed in two ends of the bearing seat 10, the bearing seat 10 pressing the bearing I8 is fixedly connected with an internal flywheel 11 through a screw III 7, an impeller 6 is sleeved on the bearing seat 10, the impeller 6 is fixedly connected on the internal flywheel 11 through a screw II 5, magnets 12 (one magnet N pole faces outwards and two adjacent magnets S poles face outwards) are arranged in a staggered manner in counter bores on the internal flywheel 11, the internal flywheel 11 is connected with a magnet fixing seat 13 through the magnet 12, a gasket 19 is arranged above the bearing I8 outside the bearing seat 10, the gasket 19 axially fixes the internal flywheel 11 through a screw VI 18, an O-shaped sealing ring 2 is arranged in a sealing groove of a machine shell 1, the machine shell 1 is sequentially covered with a resin plate 15 and a fastening ring 16 from left to right, the fastening ring 16 is fixedly connected with the machine shell 1 through a screw five 17, the resin plate 15 is pushed to press the O-shaped sealing ring 2 tightly, a closed oil cavity is formed in a closed mode, the liquid resistor in the liquid damping device for the direct-drive bicycle riding platform is combined, a magnet 12 is fixedly connected with an external flywheel 21 through a screw four 14 by a magnet fixing seat 13, magnets 12 (the N pole of one magnet faces outwards and the S poles of two adjacent magnets face outwards) are placed in a staggered mode in a counter bore on the external flywheel 21, a fan 22 is sleeved in a boss of the external flywheel 21, the fan 22 is fixedly connected with the external flywheel 21 through a screw seven 23, a key on the external flywheel 21 is sleeved in a transmission shaft 29 in a mode of aligning with a flat key 28, one side, the wind scooper 25 is fixedly connected with the casing 1 through eight screws 24, the wind scooper 25 is aligned with a fixing hole of the casing 1 and covers the casing 1, the wind scooper 25 is fixed with the casing 1 through eight screws 24 by the wind scooper 25, a second bearing 27 is pressed in a bearing hole on the outer side of the wind scooper 25, the transmission shaft 29 penetrates through an inner hole of the second bearing 27, a second spacer 26 is arranged on the transmission shaft 29, a flat key 28 is placed in a key groove on the transmission shaft 29, and the external flywheel 21 is axially fixed through a nut 20, so that the mechanical transmission and cooling device arranged outside the closed oil cavity in the liquid damping device for the direct-drive bicycle riding platform is formed.
As a specific optimization scheme of the embodiment, damping oil 30 is injected into the interior of the casing 1, and the damping oil 30 is silicone oil.
As a specific optimization scheme of the embodiment, the magnet fixing seat 13 fixedly connects the magnet 12 to the internal flywheel 11 through the screw four 14, and the internal flywheel and the external flywheel are firmly attracted together by utilizing the physical property that the opposite poles of the magnet attract each other, so that a contactless coupling effect is realized.
As a specific optimization scheme of this embodiment, the first ventilation opening 1a and the second ventilation opening 16a are respectively disposed on the casing 1 and the fastening ring 16, the sheet-shaped heat dissipation fin 1b is disposed on the outer surface of the casing 1, and the heat dissipation fin 1b and the fan 22 constitute the cooling device in the liquid damping device for the direct-drive bicycle riding platform.
As a specific optimization scheme of this embodiment, the internal flywheel 11 and the external flywheel 21 are both steel cylinder structures, and the steel cylinder structures are arranged to achieve an effect of large rotational inertia.
As a specific optimization scheme of the embodiment, the internal flywheel 11 is arranged in the closed oil cavity, the external flywheel 21 is arranged outside the closed oil cavity, and the two are separated by the resin plate 14 without any connection. By utilizing the physical property that the opposite poles of the magnet 12 are attracted, the built-in flywheel 11 and the external flywheel 21 are firmly attracted together to play a role of a contactless coupler, so that the power transmission is realized, the large inertia moment can be generated by the large rotational inertia of the built-in flywheel 11 and the external flywheel 21, and the riding is smoother and smoother.
As a specific optimization scheme of this embodiment, an end face static sealing portion is formed between the casing 1 and the resin plate 15 through the O-ring 2, and the transmission shaft 29 which does not transmit power in the closed oil cavity of the hydraulic resistor extends into the closed oil cavity, so that no dynamic seal is provided between the transmission shaft 29 and the casing 1.
In the examples: a liquid damping device for a direct-drive bicycle riding platform utilizes the physical characteristic that the opposite poles of a magnet are attracted, an internal flywheel 11 arranged in a closed oil cavity and an external flywheel 21 arranged outside the closed oil cavity are attracted together through the magnet to form a coupler without any contact, when a transmission shaft 29 is driven to rotate, the transmission shaft 29 drives the external flywheel 21 to rotate, the external flywheel 21 drives the internal flywheel arranged in the closed oil cavity to rotate, an impeller 6 arranged on the internal flywheel rotates along with the internal flywheel, the impeller 6 stirs damping oil 30 in the closed oil cavity, and due to the viscous physical characteristic of the damping oil, the damping oil 30 generates certain resistance to the impeller 6, so that the movement of a rider is consumed.
In the examples: the invention relates to a liquid damping device for a direct-drive bicycle riding platform, wherein the driving of a liquid damper adopts the novel transmission structure, a transmission shaft 30 does not need to extend into a closed oil cavity to drive an impeller 6 to work, a dynamic sealing structure between the transmission shaft and a casing does not exist, only the casing at an O-shaped sealing ring 2 and the end face between resin plates are statically sealed, the static sealing performance of the end face is convenient to control, the dynamic sealing is difficult to control due to the existence of motion amplitude, the service life influences the reliability of the sealing performance, and the sealing performance of the invention is more excellent.
In the examples: the utility model provides a liquid damping device for directly driving formula bicycle platform of riding, when external flywheel 21 is rotatory, the fan 22 that sets up on external flywheel 21 follows and rotates together, inhale cold air from the surrounding environment, under the wind pressure effect, through establishing vent two 16a on tight loop 16 and establishing vent one 1a on casing 1, blow the cold air of environment on the radiating fin 1b of casing 1 surface, carry out forced cooling heat dissipation to liquid damping device, reduce the temperature of damping oil 30 and casing 1 surface in the closed oil intracavity, temperature variation can effective control to the viscosity influence of resistance oil 30, thereby effective control resistance oil 30 acts on the resistance variation on impeller 6, the power of riding is more true. The temperature of the outer surface of the machine shell 1 is controlled within a safe temperature range, unnecessary scalding of a gas operator is avoided, and the protection is safer.
In the examples: the utility model provides a liquid damping device for directly driving formula bicycle platform of riding, what adopt is liquid damping technique, need not to connect any power, and applicable place is more extensive, and no electromagnetic noise, the transmission part that produces damping is airtight in a closed oil cavity, and the casing carries out the separation to the noise, and is more silent, the smooth characteristic of liquid damping, including the inertia effect of the external flywheel of interior establishing, built-in flywheel, the walking sensation of riding is more smooth, smooth.
In the examples: a liquid damping device for a direct-drive bicycle riding platform adopts a forced air-cooling heat dissipation structure consisting of an air guide cover 25 and a fan 22, wherein the fan 22 is fixed on an external flywheel 21, when a transmission shaft 29 rotates, the transmission shaft 29 drives the external flywheel 21 and the fan 22 to rotate, and ambient cold air is sucked in and blown to heat dissipation fins 1b on the outer surface of a machine shell 1 through a fastening ring 16 and ventilation openings on the machine shell 1 under the guide of the air guide cover 25, so that the purpose of forced heat dissipation and cooling is achieved, the heat dissipation is efficient, and the service life of the device is prolonged.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides a liquid damping device for directly driving formula bicycle platform of riding, includes casing (1) and bearing frame (10), its characterized in that: the bottom of the machine shell (1) is fixedly connected with a resistance wheel shaft (3) through a first screw (4), a first spacer sleeve (9) is sleeved in an inner hole of a bearing seat (10), a first bearing (8) is pressed in two ends of the bearing seat (10), the bearing seat (10) pressing the first bearing (8) is fixedly connected with a built-in flywheel (11) through a third screw (7), an impeller (6) is sleeved on the bearing seat (10), the impeller (6) is fixedly connected onto the built-in flywheel (11) through a second screw (5), magnets (12) are placed in counter bores in the built-in flywheel (11) in a staggered mode, the built-in flywheel (11) is connected with a magnet fixing seat (13) through the magnets (12), a gasket (19) is arranged above the first bearing (8) on the outer side of the bearing seat (10), and the gasket (19) axially fixes the built-in flywheel (11) through a sixth screw (18), an O-shaped sealing ring (2) is arranged in a sealing groove of the machine shell (1), the machine shell (1) is sequentially covered with a resin plate (15) and a fastening ring (16) from left to right, the fastening ring (16) is fixedly connected with the machine shell (1) through a screw five (17), the resin plate (15) is pushed to compress the O-shaped sealing ring (2), a closed oil cavity is formed in a closed mode, the liquid resistor in the liquid damping device for the direct-drive bicycle riding platform is combined, the magnet (12) is fixedly connected with an external flywheel (21) through a screw four (14) by the magnet fixing seat (13), magnets (12) are placed in counter bores of the external flywheel (21) in a staggered mode, a fan (22) is sleeved in a boss of the external flywheel (21), the fan (22) is fixedly connected with the external flywheel (21) through a screw seven (23), and a transmission shaft (29) is sleeved in the external flywheel (21) through a flat key (27), one side of the fan (22) is provided with an air guide cover (25), the air guide cover (25) is fixedly connected with the machine shell (1) through an eight (24) screw, a second bearing (27) is arranged in a bearing hole on the outer side of the air guide cover (25) in a pressing mode, the transmission shaft (29) penetrates through an inner hole of the second bearing (27), a second spacer sleeve (26) is arranged on the transmission shaft (29), a flat key (28) is placed in a key groove in the transmission shaft (29), and the external flywheel (21) is axially fixed through a nut (20), so that the mechanical transmission and cooling device arranged outside the closed oil cavity in the liquid damping device for the direct-drive bicycle riding platform is combined.
2. The hydraulic damping device for a direct drive bicycle riding platform of claim 1, further comprising: damping oil (30) is injected into the shell (1), and the damping oil (30) is silicone oil.
3. The hydraulic damping device for a direct drive bicycle riding platform of claim 1, further comprising: the magnet fixing seat (13) fixedly connects the magnet (12) to the built-in flywheel (11) through a screw four (14).
4. The hydraulic damping device for a direct drive bicycle riding platform of claim 1, further comprising: casing (1), tight loop (16) on be equipped with vent one (1a) and vent two (16a) respectively, casing (1) surface is equipped with flaky radiating fin (1b), and radiating fin (1b) and fan (22) constitute this a cooling device among the liquid damping device for direct drive formula bicycle platform of riding.
5. The hydraulic damping device for a direct drive bicycle riding platform of claim 1, further comprising: the internal flywheel (11) and the external flywheel (21) are both steel cylinder structures.
6. The hydraulic damping device for a direct drive bicycle riding platform of claim 1, further comprising: the internal flywheel (11) is arranged in the closed oil cavity, the external flywheel (21) is arranged outside the closed oil cavity, and the internal flywheel and the external flywheel are separated by the resin plate (14) and are not connected with each other.
7. The hydraulic damping device for a direct drive bicycle riding platform of claim 1, further comprising: an end face static sealing part is formed between the machine shell (1) and the resin plate (15) through an O-shaped sealing ring (2), a transmission shaft (29) which does not transmit power in a closed oil cavity of the liquid resistor extends into the closed oil cavity, and dynamic sealing between the transmission shaft (29) and the machine shell (1) is omitted.
8. The hydraulic damping device for a direct drive bicycle riding platform of claim 1, further comprising: the wind scooper (25) is aligned to a fixing hole of the shell (1) and covers the shell (1), and the wind scooper (25) is fixed with the shell (1) through the eight screws (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910259571.XA CN111760236A (en) | 2019-04-02 | 2019-04-02 | Liquid damping device for direct-drive bicycle riding platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910259571.XA CN111760236A (en) | 2019-04-02 | 2019-04-02 | Liquid damping device for direct-drive bicycle riding platform |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111760236A true CN111760236A (en) | 2020-10-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910259571.XA Pending CN111760236A (en) | 2019-04-02 | 2019-04-02 | Liquid damping device for direct-drive bicycle riding platform |
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| Country | Link |
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| CN (1) | CN111760236A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000072923A1 (en) * | 1999-05-27 | 2000-12-07 | Kurt Manufacturing Company, Inc. | Exercise resistance device with magnets |
| CN205699084U (en) * | 2016-03-21 | 2016-11-23 | 祺骅股份有限公司 | Tension training device |
| US9814931B1 (en) * | 2013-07-29 | 2017-11-14 | Kurt Manufacturing Company, Inc. | Bicycle trainer with roller speed sensor |
| CN208081735U (en) * | 2018-03-30 | 2018-11-13 | 金华市天裕工具有限公司 | A kind of damping unit for bicycle training bench |
-
2019
- 2019-04-02 CN CN201910259571.XA patent/CN111760236A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000072923A1 (en) * | 1999-05-27 | 2000-12-07 | Kurt Manufacturing Company, Inc. | Exercise resistance device with magnets |
| US9814931B1 (en) * | 2013-07-29 | 2017-11-14 | Kurt Manufacturing Company, Inc. | Bicycle trainer with roller speed sensor |
| CN205699084U (en) * | 2016-03-21 | 2016-11-23 | 祺骅股份有限公司 | Tension training device |
| CN208081735U (en) * | 2018-03-30 | 2018-11-13 | 金华市天裕工具有限公司 | A kind of damping unit for bicycle training bench |
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Application publication date: 20201013 |
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