CN216721120U

CN216721120U - Direct-drive type indoor bicycle power generation system

Info

Publication number: CN216721120U
Application number: CN202123246407.7U
Authority: CN
Inventors: 陈正江; 田坤; 范子年
Original assignee: Shanghai Congshizhibai Technology Co ltd
Current assignee: Shanghai Congshizhibai Technology Co ltd
Priority date: 2021-12-22
Filing date: 2021-12-22
Publication date: 2022-06-10
Anticipated expiration: 2031-12-22

Abstract

The utility model provides a direct-drive indoor bicycle power generation system, wherein a bicycle comprises a rotating shaft and cranks arranged at two ends of the rotating shaft, a power generation device is sleeved on the rotating shaft and comprises an induction generator and an electric energy conversion and energy storage device connected with the induction generator, the induction generator consists of a generator rotor and a generator stator which are coaxially arranged on an inner ring and an outer ring, the generator rotor is annular, a one-way needle bearing is coaxially fixed on the inner ring of the generator rotor, a plurality of permanent magnets are circumferentially arranged on the outer ring of the generator rotor, and the one-way needle bearing is sleeved on the rotating shaft in a one-way rotation mode. The direct-drive power generation device adopts direct-drive power generation, has high power generation efficiency and low running noise, simplifies an intermediate transmission mechanism and is beneficial to reducing the occupied area; when the treading is stopped, the inner wall and the outer wall of the one-way needle bearing can rotate relatively, so that the generator rotor can not drive the axis and the cranks at the two ends of the axis to rotate continuously, the crank is prevented from hurting legs, and the impact on knees is reduced.

Description

Direct-drive type indoor bicycle power generation system

Technical Field

The utility model relates to fitness equipment, in particular to a direct-drive indoor bicycle power generation system.

Background

With the rapid development of economic society, the living standard of people is improved day by day, and the attention of more and more people to health is gradually improved, so that the shadow of the spinning can be seen everywhere no matter in a gymnasium or a private family.

At present, some manufacturers simply reform a bicycle, and when in exercise, a crank is driven to rotate by stepping on a foot to drive a chain wheel to rotate; the chain wheel drives the rear flywheel to rotate through the chain, and the rotating flywheel drives the generator to rotate to generate electricity.

However, these designs require a transmission system to transmit the treaded energy to the generator, which causes energy loss and relatively large noise, and the spinning bike does not have a unidirectional transmission device such as a ratchet wheel, and the crank continues to rotate under the inertia effect when the user stops at feet, so that the user can easily hit the legs and can cause large impact on the knees, thereby risking damage to the knees.

SUMMERY OF THE UTILITY MODEL

The utility model provides a direct-drive indoor bicycle power generation system, wherein an indoor bicycle comprises a rotating shaft and cranks arranged at two ends of the rotating shaft, pedals are fixed on the cranks, a power generation device is sleeved on the rotating shaft and comprises an induction generator and an electric energy conversion and energy storage device connected with the induction generator,

the induction generator consists of a generator rotor and a generator stator which are coaxially arranged on an inner ring and an outer ring, the generator rotor is annular, a one-way needle bearing is coaxially fixed on the inner ring of the generator rotor, a plurality of permanent magnets are circumferentially arranged on the outer ring of the generator rotor, and the one-way needle bearing is sleeved on the rotating shaft in a one-way rotating manner;

the electric energy conversion energy storage device comprises a voltage stabilizer, a transformer and a storage battery which are connected in sequence, wherein the voltage stabilizer is connected with a coil of a stator of the generator through a lead.

Furthermore, the middle part of the rotating shaft is provided with a section of cylindrical surface matched with the inner ring of the unidirectional needle bearing, and one end of the cylindrical surface is provided with a limit convex ring.

Further, induction generator disposes the protection casing, the protection casing is formed by two annular end covers connection in opposite directions, at least one the inner circle of annular end cover is provided with the axial sleeve pipe and is used for installing the axis of rotation.

Furthermore, each crank is fixedly connected with one end of the rotating shaft through a spline and is locked and fixed by a crank cover.

Furthermore, each crank is fixedly connected with one end of the rotating shaft through a screw.

Because the utility model adopts the technical scheme, the utility model has the advantages that:

1) direct drive power generation is adopted, a rotating shaft connected with a crank drives an induction generator to generate power through a one-way needle bearing, intermediate transmission mechanisms such as chains and transmission gears are not needed, the power generation efficiency is high, and the running noise is low; in addition, the intermediate transmission mechanism is omitted, so that the size can be further reduced, and the occupied area is reduced;

2) the inner ring of the unidirectional needle bearing is provided with a circle of axial rollers which are distributed in the circumferential direction, when the stepping is stopped, the inner wall and the outer wall of the unidirectional needle bearing can rotate relatively, so that the generator rotor can not drive the axle center and the cranks at the two ends of the axle center to rotate continuously, and the crank is prevented from hurting legs.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is an exploded view of a direct drive type indoor bicycle power generation system provided by the present invention;

fig. 2 is an assembly view of the rotating shaft and the unidirectional needle bearing.

Detailed Description

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the utility model.

In the following description, for the purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The following detailed description of the preferred embodiments of the utility model, however, the utility model is capable of other embodiments in addition to those detailed.

Fig. 1 shows an assembly diagram of a direct-drive indoor bicycle power generation system according to an embodiment of the present invention, where two ends of a rotating shaft 105 of a bicycle are connected to cranks 102, each crank 102 is fixed with a pedal, and a power generation device is sleeved on the rotating shaft 105, where the power generation device includes an induction generator and a power conversion and storage device connected to the induction generator.

In the utility model, the induction generator is composed of a generator rotor 107 and a generator stator 106 which are coaxially arranged on an inner ring and an outer ring, the generator rotor 107 is annular, a unidirectional needle bearing 104 is coaxially fixed on the inner ring of the generator rotor 107, a plurality of permanent magnets are arranged on the outer ring of the generator rotor 107 along the circumferential direction, and the unidirectional needle bearing 104 is sleeved on a rotating shaft 105 in a unidirectional rotation manner. The electric energy conversion energy storage device comprises a voltage stabilizer 2, a transformer 3 and a storage battery 4 which are connected in sequence, wherein the voltage stabilizer 2 is connected with a coil of a generator stator 106 through a conducting wire.

When the utility model works, a user drives the crank 102 to rotate when stepping on for exercise, the crank 102 drives the rotating shaft 105 to rotate, the rotating shaft 105 drives the generator rotor 107 to rotate through the one-way needle bearing 104, induction current is generated in a coil of the generator stator 106, electric energy is stored in the storage battery 4 through the voltage stabilizer 2 and the transformer 3 in sequence, and other electronic equipment (such as an entertainment flat plate and the like) can be supplied with power through the storage battery 4. When a user suddenly stops stepping, the generator rotor 107 continues to rotate under the action of inertia, and the inner wall and the outer wall of the one-way needle bearing 104 can rotate relatively, so that the generator rotor 107 cannot drive the rotating shaft 105 and the cranks 102 at the two ends of the rotating shaft to continue rotating, and the cranks 102 are prevented from hurting legs.

In an alternative embodiment, a cylindrical surface matched with the inner ring of the unidirectional needle bearing 104 is arranged in the middle of the rotating shaft 105, and a limiting convex ring 105-2 is arranged at one end of the cylindrical surface, as shown in fig. 2, the unidirectional needle bearing 104 on the right side is inserted into the cylindrical surface in the middle of the rotating shaft 105 in the direction of the arrow and is limited by the limiting convex ring 105-2, so that the connection between the rotating shaft 105 and the unidirectional needle bearing 104 is completed.

In an alternative embodiment, the induction generator is provided with a protective shell, the protective shell is formed by oppositely connecting two annular end covers 108 and 103, and the two

annular end covers

108 and 103 are buckled together to form a closed shell, so that the induction generator is protected, and the appearance is more attractive. An axial sleeve 108-1 is provided at the inner periphery of at least one annular end cap (shown as end cap 108) for mounting rotating shaft 105.

In an alternative embodiment, each crank 102 is fixedly connected to one end of the rotating shaft 105 by a spline 105-1 and is locked in place by a crank cover 101. In another embodiment, the crank 102 is fixedly connected with one end of the rotating shaft 105 through a screw, so that the processing structure of the splines at the two ends of the rotating shaft 105 can be simplified, and the processing cost can be reduced.

The above description is of the preferred embodiment of the utility model. It is to be understood that the utility model is not limited to the particular embodiments described above, in that devices and structures not described in detail are understood to be implemented in a manner common in the art; those skilled in the art can make many possible variations and modifications to the disclosed embodiments, or modify equivalent embodiments to equivalent variations, without departing from the spirit of the utility model, using the methods and techniques disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the protection of the technical solution of the present invention, unless the contents of the technical solution of the present invention are departed.

Claims

1. A direct-drive indoor bicycle power generation system comprises a rotating shaft (105) and cranks (102) arranged at two ends of the rotating shaft (105), wherein pedals are fixed on each crank (102), and is characterized in that a power generation device is sleeved on the rotating shaft (105) and comprises an induction generator and an electric energy conversion and storage device connected with the induction generator,

the induction generator is composed of a generator rotor (107) and a generator stator (106) which are coaxially arranged on an inner ring and an outer ring, the generator rotor (107) is annular, a one-way needle bearing (104) is coaxially fixed on the inner ring of the generator rotor (107), a plurality of permanent magnets are arranged on the outer ring of the generator rotor (107) along the circumferential direction, and the one-way needle bearing (104) is sleeved on the rotating shaft (105) in a one-way rotating manner;

the electric energy conversion energy storage device comprises a voltage stabilizer (2), a transformer (3) and a storage battery (4) which are sequentially connected, wherein the voltage stabilizer (2) is connected with a coil of a generator stator (106) through a lead.

2. A direct drive type indoor bicycle power generation system according to claim 1, wherein a cylindrical surface which is matched with the inner ring of the unidirectional needle bearing (104) is provided at the middle part of the rotating shaft (105), and a limit convex ring (105-2) is provided at one end of the cylindrical surface.

3. A direct drive indoor bicycle power generation system according to claim 1, wherein the induction generator is provided with a protective housing formed by connecting two annular end covers in opposite directions, and an inner ring of at least one of the annular end covers is provided with an axial sleeve (108-1) for mounting the rotating shaft (105).

4. A direct drive type indoor bicycle power generation system according to claim 1, wherein each crank (102) is fixedly connected with one end of the rotating shaft (105) through a spline (105-1) and is locked and fixed by a crank cover (101).

5. A direct drive type indoor bicycle power generation system according to claim 1, wherein each crank (102) is fixedly connected to one end of the rotating shaft (105) by a screw.