CN216660184U - Bicycle flywheel capable of moving forwards by forward pedaling and backward pedaling - Google Patents

Abstract

The utility model discloses a flywheel for a bicycle capable of moving forwards by forward pedaling and backward pedaling, which comprises a component assembly for realizing that the bicycle can move forwards by forward pedaling and backward pedaling, wherein the component assembly is arranged in a shell fixed with a frame, a pedal connecting shaft and a fluted disc connecting shaft are connected in the shell, a chain wheel A and a gear A which rotate synchronously are arranged on the pedal connecting shaft, a chain wheel B and a gear B are arranged on the fluted disc connecting shaft through the flywheel, the chain wheel A and the chain wheel B are connected through a chain, the gear A and the gear B are matched with each other, a chain wheel C is sleeved on the fluted disc connecting shaft positioned on the outer side of the shell, a second flywheel is arranged on the fluted disc connecting shaft between the shell and the chain wheel C, and is used for driving the chain wheel C to rotate forwards when the fluted disc connecting shaft rotates forwards, and the chain wheel C can independently rotate backwards; the utility model is used for ensuring flexible meshing or separation of the fluted disc and the fluted disc connecting shaft.

Description

Bicycle flywheel capable of moving forwards by forward pedaling and backward pedaling

Technical Field

The utility model relates to a flywheel for a bicycle capable of moving forward by forward pedaling and backward pedaling, belonging to the field of bicycle tools.

Background

The existing bicycle design, in order to relieve the fatigue of forward pedaling of users or provide new experience, makes a bicycle capable of forward and backward pedaling, such as the applicant's existing patent number "201620691351.6" patent name "exercise bicycle capable of forward and backward pedaling" and the technical means and principle that "it includes a frame, front and rear wheels, a handrail, a fluted disc and a third flywheel connected by a second chain, the improvement mainly relates to two parts, the transmission part of which is a pedal and the fluted disc specifically is that a pedal connecting shaft and a fluted disc connecting shaft are connected on the frame, a driving gear, a driving sprocket and a pedal component are sleeved on the pedal connecting shaft, the fluted disc, a first flywheel and a second flywheel which are reversely installed are connected on the fluted disc connecting shaft, a driven gear is connected on the first flywheel, a driven sprocket is connected on the second flywheel, and the driving gear and the driven gear are required to be meshed, the driving chain wheel is connected with the driven chain wheel through a first chain, and the fluted disc is connected with a third flywheel on the rear wheel through a second chain. When the pedal connecting shaft rotates forwards, the driving chain wheel drives the driven chain wheel by the first chain, the driven chain wheel drives the fluted disc synchronously, the fluted disc drives the rear wheel to rotate by the second chain, and at the moment, under the influence of the first flywheel which is reversely installed, the driving gear and the driven gear are meshed with each other to idle, so that the forward pedal bicycle can run forwards. When the pedals reversely rotate, the driven chain wheel is not driven by the fluted disc connecting shaft under the influence of the second flywheel, and the reversely rotating driving gear drives the meshed driven wheel gear to rotate in the forward direction so as to drive the fluted disc and the chain wheel of the rear wheel, so that the reverse pedals can move forwards from the bicycle; the reverse thinking can better realize body building and can effectively relax the people riding the bicycle for a long time. ", the structure diagram is shown in FIG. 6; although the effect that the front pedal and the back pedal can move forwards can be well achieved, the applicant finds that the jamming condition exists when the bicycle is pedaled to generate force or stops pedalling, the reason is that idle rotation cannot be achieved between the fluted disc 8 driving the rear wheel sprocket and the fluted disc connecting shaft on the fluted disc, and particularly, the flywheel between the fluted disc connecting shaft and the fluted disc cannot be flexibly separated.

That is, there is a need for a bicycle freewheel that can move forward with both forward and reverse pedaling, and that is used to ensure flexible engagement or disengagement of the toothed disc and the toothed disc connecting shaft.

Disclosure of Invention

The technical problem to be solved by the utility model is to provide a bicycle flywheel capable of moving forwards by forward pedaling and backward pedaling, which is used for ensuring flexible meshing or separation of a fluted disc and a fluted disc connecting shaft; the defects of the prior art can be overcome.

The technical scheme of the utility model is as follows: the utility model provides a just pedal the bicycle flywheel of counterpedaling and can both moving ahead, it is including realizing that the bicycle just pedals the component assembly that the counterpedaling can both move ahead, the component assembly sets up in the casing fixed with the frame, be connected with pedal connecting axle and fluted disc connecting axle in the casing, be equipped with synchronous pivoted sprocket A and gear A on the pedal connecting axle, install sprocket B, gear B through the flywheel on the fluted disc connecting axle, sprocket A and sprocket B pass through the chain and connect, gear A and gear B mutually support, cup jointed sprocket C on the fluted disc connecting axle that is located the casing outside, be equipped with the second flywheel on the fluted disc connecting axle between casing and sprocket C, the second flywheel is used for when the fluted disc connecting axle forward rotation, drives sprocket C forward rotation, sprocket C can independent antiport.

The second flywheel comprises an axial thrust device, a sliding sleeve and a chain wheel C installation sleeve, the axial thrust device is located between the shell and the sliding sleeve, the sliding sleeve is located between the axial thrust device and the chain wheel C, the joint face of the sliding sleeve and the chain wheel C installation sleeve is respectively provided with a thorn I and a thorn II, the thorn I and the thorn II are meshed when the fluted disc connecting shaft rotates positively, the thorn I and the thorn II are separated when the chain wheel C drives the chain wheel C installation sleeve to idle, and the chain wheel C installation sleeve is installed on the fluted disc connecting shaft through a bearing.

The axial thrust device comprises a positioning column and a sliding sleeve limiting device which are arranged on the fluted disc connecting shaft, the sliding sleeve limiting device limits the rotation and the axial movement of the sliding sleeve, a thorn-shaped opening is formed in the end face, close to the shell, of the sliding sleeve, and the positioning column is positioned at the bottom of the thorn-shaped opening when the thorn I and the thorn II are separated; the positioning column is positioned at the opening end of the thorn-shaped opening when the fluted disc connecting shaft rotates positively.

The sliding sleeve limiting device comprises a clamping part arranged on the sliding sleeve, a guide rod which is consistent with the axial direction of the fluted disc connecting shaft is arranged on the shell, and a guide hole which is matched with the guide rod is arranged on the clamping part.

The clamping part comprises two semicircular hoops with one ends fixed with each other, the free ends of the semicircular hoops are provided with connecting arms, the connecting arms are provided with opposite through holes, the through holes are connected with bolts and fastening screws, and the guide holes are positioned at the connecting parts of the two semicircular hoops.

The sliding sleeve limiting device comprises a protruding sliding block arranged on the sliding sleeve and a sliding groove connected to the shell, and the sliding block is located in the sliding groove.

The sliding sleeve limiting device is matched with the teeth of the fluted disc connecting shaft through the sliding sleeve.

The axial thrust device is an external thread arranged on the fluted disc connecting shaft, and an internal thread matched with the external thread is arranged on the inner wall of the sliding sleeve.

The axial thrust device is a spring which is sleeved on the fluted disc connecting shaft and is in a compressed state.

The fluted disc connecting shaft is provided with a limiting ring, the limiting ring is provided with a clamp spring for limiting the position of the chain wheel C, and the outer end of the fluted disc connecting shaft is provided with a limiting screw of the chain wheel C.

Compared with the prior art, the flywheel for the bicycle capable of advancing by forward pedaling and backward pedaling has the advantages that the second flywheel is arranged on the fluted disc connecting shaft between the shell and the sprocket C and used for driving the sprocket C to rotate forward when the fluted disc connecting shaft rotates forward, the sprocket C can independently rotate reversely, and therefore flexible meshing or separation of the fluted disc and the fluted disc connecting shaft can be guaranteed through the second flywheel.

The second flywheel comprises an axial thrust device, a sliding sleeve and a chain wheel C installation sleeve, the axial thrust device is located between the shell and the sliding sleeve, the sliding sleeve is located between the axial thrust device and the chain wheel C, the joint face of the sliding sleeve and the chain wheel C installation sleeve is respectively provided with a thorn I and a thorn II, the thorn I and the thorn II are meshed when the fluted disc connecting shaft rotates positively, the thorn I and the thorn II are separated when the chain wheel C drives the chain wheel C installation sleeve to idle, the chain wheel C installation sleeve is installed on the fluted disc connecting shaft through a bearing, and by means of the structure, the axial thrust device pushes the sliding sleeve, the thorn I on the sliding sleeve is meshed with the thorn II on the chain wheel C installation sleeve, and the thorn I and the thorn II are separated when the chain wheel C drives the chain wheel C installation sleeve to idle, so that effective separation is guaranteed.

The first scheme of the axial thrust device is as follows: the positioning column comprises a positioning column and a sliding sleeve limiting device which are arranged on a fluted disc connecting shaft, wherein the sliding sleeve limiting device limits the rotation and axial movement of a sliding sleeve, a thorn-shaped opening is formed in the end face, close to the shell, of the sliding sleeve, and the positioning column is positioned at the bottom of the thorn-shaped opening when the thorn I and the thorn II are separated; when the fluted disc connecting shaft rotates forwards, the positioning column is positioned at the opening end of the thorn-shaped opening, so that when a user drives the fluted disc connecting shaft, the chain wheel C connecting shaft drives the positioning column on the chain wheel C connecting shaft to rotate towards the inclined direction of the thorn-shaped opening, and the sliding sleeve moves towards the chain wheel C direction under the guiding action of the inclined edge of the thorn-shaped opening, so that the mutual meshing of the thorn I and the thorn II is realized, and after the meshing, the positioning column can also play a positioning role, and the sliding sleeve is ensured to rotate along with the fluted disc connecting shaft; when the chain wheel C is not driven any more, the fluted disc rotating shaft stops rotating, and under the rotating inertia of the chain wheel C, the speed difference is generated between the chain wheel C and the fluted disc rotating shaft, so that when the thorn II on the chain wheel C rotates, an inward pushing force is given to the thorn I, and the separation of the thorn I and the thorn II is realized, and the aim of idling is achieved;

the first scheme of the sliding sleeve limiting device is as follows: the gear disc connecting shaft clamping device comprises a clamping part arranged on a sliding sleeve, a guide rod which is consistent with the axial direction of a gear disc connecting shaft is arranged on a shell, and a guide hole which is matched with the guide rod is arranged on the clamping part; such a structure facilitates the sliding sleeve to be pushed toward the sprocket C by the clamping portion and the guide bar.

The clamping part comprises two semicircular hoops with one ends fixed with each other, the free ends of the semicircular hoops are provided with connecting arms, the connecting arms are provided with opposite through holes, the through holes are connected with bolts and fastening screws, and the guide holes are positioned at the connecting parts of the two semicircular hoops, so that the clamping force between the two semicircular hoops, the bolts and the fastening screws can be increased or adjusted.

The second scheme of the sliding sleeve limiting device is as follows: the sliding sleeve comprises a convex sliding block arranged on the sliding sleeve and a sliding groove connected to the shell, wherein the sliding block is positioned in the sliding groove; such a structure facilitates the sliding sleeve to be pushed toward the sprocket C by the clamping portion and the guide bar.

The third scheme of the sliding sleeve limiting device is as follows: it comprises a sliding sleeve matched with the teeth-strengthening of a fluted disc connecting shaft; such a structure facilitates the sliding sleeve to be pushed toward the sprocket C by the clamping portion and the guide bar.

The second scheme of the axial thrust device is as follows: the structure comprises an external thread arranged on a fluted disc connecting shaft, and an internal thread matched with the external thread is arranged on the inner wall of a sliding sleeve, so that when the fluted disc connecting shaft rotates, the sliding sleeve moves towards the direction of a chain wheel C under the action of the matched internal thread and external thread, thereby realizing the mutual meshing of a convex tooth I and a convex tooth II, and after meshing, the matched internal thread and external thread can also play a role in positioning, and the sliding sleeve is ensured to rotate along with the chain wheel C connecting shaft; when no longer driving, the fluted disc rotation axis stop rotation, under the rotatory inertia of sprocket C, speed difference appears in sprocket C and fluted disc rotation axis to thorn II on the sprocket C is rotatory, can give I the power of pushing in of thorn, thereby realizes the separation of thorn I and thorn II, reaches the purpose of idle running.

Drawings

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings, in which:

fig. 1 is a schematic perspective view of a first embodiment of an axial thrust device according to the present invention.

Fig. 2 is a schematic perspective view of another embodiment of the axial thrust device of the present invention.

Fig. 3 is a partially enlarged schematic view of a portion a in fig. 2.

Fig. 4 is a schematic view of a connection structure of a second aspect of the axial thrust device of the present invention.

Fig. 5 is a schematic perspective view of a second embodiment of the axial thrust unit of the present invention.

Fig. 6 is a schematic perspective view of a third embodiment of the axial thrust unit of the present invention.

Fig. 7 is a schematic diagram of a prior art infrastructure.

Wherein, the frame 1; a housing 2; a pedal connecting shaft 3; a fluted disc connecting shaft 4; sprocket A5; gear a 6; sprocket B7; gear B8; sprocket C9; a sliding sleeve 10; the chain wheel C is provided with a sleeve 11; thorns I12; thorn II 13; a positioning post 14; a barbed opening 15; an external thread 16; a clamping portion 17; a guide bar 18; the screws 19 are tightened.

Detailed Description

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the preferred embodiments are illustrative of the utility model only and are not limiting upon the scope of the utility model.

Example 1.

As shown in fig. 1, a bicycle flywheel capable of forward and backward pedaling comprises a component assembly for forward and backward pedaling of a bicycle, the component assembly is arranged in a housing 2 fixed with a frame 1, a pedal connecting shaft 3 and a fluted disc connecting shaft 4 are connected in the housing 2, a sprocket A5 and a gear A6 which rotate synchronously are arranged on the pedal connecting shaft 3, a sprocket B7 and a gear B8 are arranged on the fluted disc connecting shaft 4 through a flywheel, the sprocket A5 and the sprocket B7 are connected through a chain, the gear A6 and the gear B8 are matched with each other, a sprocket C9 is sleeved on the fluted disc connecting shaft 4 positioned outside the housing 2, a second flywheel is arranged on the fluted disc connecting shaft 4 between the housing 2 and the sprocket C9, the second flywheel is used for driving the sprocket C9 to rotate forward when the fluted disc connecting shaft 4 rotates forward, and the sprocket C9 can rotate reversely.

The second flywheel comprises an axial thrust device, a sliding sleeve 10 and a chain wheel C mounting sleeve 11, the axial thrust device is located between the shell 2 and the sliding sleeve 10, the sliding sleeve 10 is located between the axial thrust device and the chain wheel C9, the connecting surface of the sliding sleeve 10 and the chain wheel C mounting sleeve 11 is respectively provided with a thorn I12 and a thorn II 13, the thorn I12 and the thorn II 13 are meshed when the fluted disc connecting shaft 4 rotates forwards, the thorn I12 and the thorn II 13 are separated when the chain wheel C9 drives the chain wheel C mounting sleeve 11 to idle, and the chain wheel C mounting sleeve 11 is mounted on the fluted disc connecting shaft 4 through a bearing.

The axial thrust device comprises a positioning column 14 and a sliding sleeve limiting device which are arranged on the fluted disc connecting shaft 4, the sliding sleeve limiting device limits the rotation and the axial movement of the sliding sleeve 10, a thorn-shaped opening 15 is formed in the end face, close to the shell 2, of the sliding sleeve 10, and the positioning column 14 is positioned at the bottom in the thorn-shaped opening 15 when the thorn I12 and the thorn II 13 are separated; when the fluted disc connecting shaft 4 rotates positively, the positioning column 14 is positioned at the opening end of the thorn-shaped opening 15.

The sliding sleeve limiting device comprises a clamping part 17 arranged on the sliding sleeve 10, a guide rod 18 which is consistent with the axial direction of the fluted disc connecting shaft 4 is arranged on the shell 2, and a guide hole which is matched with the guide rod 18 is arranged on the clamping part 17; the clamping part 17 comprises two semicircular hoops with one ends fixed with each other, the free ends of the semicircular hoops are provided with connecting arms, the connecting arms are provided with opposite through holes, the through holes are connected with bolts and fastening screws 19, and the guide holes are positioned at the connecting parts of the two semicircular hoops.

A limit ring is arranged on the fluted disc connecting shaft 4, a snap spring for limiting the position of the chain wheel C9 is arranged on the limit ring, and a limit screw of the chain wheel C9 is arranged at the outer end of the fluted disc connecting shaft 4.

Example 2.

As shown in fig. 1, a bicycle flywheel capable of forward and backward pedaling comprises a component assembly for forward and backward pedaling of a bicycle, the component assembly is arranged in a housing 2 fixed with a frame 1, a pedal connecting shaft 3 and a fluted disc connecting shaft 4 are connected in the housing 2, a sprocket A5 and a gear A6 which rotate synchronously are arranged on the pedal connecting shaft 3, a sprocket B7 and a gear B8 are arranged on the fluted disc connecting shaft 4 through a flywheel, the sprocket A5 and the sprocket B7 are connected through a chain, the gear A6 and the gear B8 are matched with each other, a sprocket C9 is sleeved on the fluted disc connecting shaft 4 positioned outside the housing 2, a second flywheel is arranged on the fluted disc connecting shaft 4 between the housing 2 and the sprocket C9, the second flywheel is used for driving the sprocket C9 to rotate forward when the fluted disc connecting shaft 4 rotates forward, and the sprocket C9 can rotate reversely.

The second flywheel comprises an axial thrust device, a sliding sleeve 10 and a chain wheel C mounting sleeve 11, the axial thrust device is located between the shell 2 and the sliding sleeve 10, the sliding sleeve 10 is located between the axial thrust device and the chain wheel C9, the connecting surface of the sliding sleeve 10 and the chain wheel C mounting sleeve 11 is respectively provided with a thorn I12 and a thorn II 13, the thorn I12 and the thorn II 13 are meshed when the fluted disc connecting shaft 4 rotates forwards, the thorn I12 and the thorn II 13 are separated when the chain wheel C9 drives the chain wheel C mounting sleeve 11 to idle, and the chain wheel C mounting sleeve 11 is mounted on the fluted disc connecting shaft 4 through a bearing.

The axial thrust device comprises a positioning column 14 and a sliding sleeve limiting device which are arranged on the fluted disc connecting shaft 4, the sliding sleeve limiting device limits the rotation and the axial movement of the sliding sleeve 10, a thorn-shaped opening 15 is formed in the end face, close to the shell 2, of the sliding sleeve 10, and the positioning column 14 is positioned at the bottom in the thorn-shaped opening 15 when the thorn I12 and the thorn II 13 are separated; when the fluted disc connecting shaft 4 rotates positively, the positioning column 14 is positioned at the opening end of the thorn-shaped opening 15.

The sliding sleeve limiting device is a protruding sliding block arranged on the sliding sleeve 10 and a sliding groove connected to the shell 2, and the sliding block is located in the sliding groove.

Example 3.

As shown in fig. 1, a bicycle flywheel capable of forward pedaling and backward pedaling comprises a component assembly for forward pedaling and backward pedaling of a bicycle, the component assembly is arranged in a shell 2 fixed with a frame 1, a pedal connecting shaft 3 and a fluted disc connecting shaft 4 are connected in the shell 2, a sprocket A5 and a gear A6 which rotate synchronously are arranged on the pedal connecting shaft 3, a sprocket B7 and a gear B8 are mounted on the fluted disc connecting shaft 4 through a flywheel, the sprocket A5 and the sprocket B7 are connected through a chain, the gear A6 and the gear B8 are matched with each other, a sprocket C9 is sleeved on the fluted disc connecting shaft 4 positioned outside the shell 2, a second flywheel is arranged on the fluted disc connecting shaft 4 between the shell 2 and the sprocket C9 and is used for driving the sprocket C9 to rotate forward when the fluted disc connecting shaft 4 rotates forward, and the sprocket C9 can rotate reversely independently.

The second flywheel comprises an axial thrust device, a sliding sleeve 10 and a chain wheel C mounting sleeve 11, the axial thrust device is located between the shell 2 and the sliding sleeve 10, the sliding sleeve 10 is located between the axial thrust device and the chain wheel C9, the connecting surface of the sliding sleeve 10 and the chain wheel C mounting sleeve 11 is respectively provided with a thorn I12 and a thorn II 13, the thorn I12 and the thorn II 13 are meshed when the fluted disc connecting shaft 4 rotates forwards, the thorn I12 and the thorn II 13 are separated when the chain wheel C9 drives the chain wheel C mounting sleeve 11 to idle, and the chain wheel C mounting sleeve 11 is mounted on the fluted disc connecting shaft 4 through a bearing.

The axial thrust device comprises a positioning column 14 and a sliding sleeve limiting device which are arranged on the fluted disc connecting shaft 4, the sliding sleeve limiting device limits the rotation and the axial movement of the sliding sleeve 10, a thorn-shaped opening 15 is formed in the end face, close to the shell 2, of the sliding sleeve 10, and the positioning column 14 is positioned at the bottom in the thorn-shaped opening 15 when the thorn I12 and the thorn II 13 are separated; when the fluted disc connecting shaft 4 rotates positively, the positioning column 14 is positioned at the opening end of the thorn-shaped opening 15.

The sliding sleeve limiting device is formed by matching the sliding sleeve 10 with teeth of the fluted disc connecting shaft 4.

Example 4.

As shown in fig. 1, a bicycle flywheel capable of forward and backward pedaling comprises a component assembly for forward and backward pedaling of a bicycle, the component assembly is arranged in a housing 2 fixed with a frame 1, a pedal connecting shaft 3 and a fluted disc connecting shaft 4 are connected in the housing 2, a sprocket A5 and a gear A6 which rotate synchronously are arranged on the pedal connecting shaft 3, a sprocket B7 and a gear B8 are arranged on the fluted disc connecting shaft 4 through a flywheel, the sprocket A5 and the sprocket B7 are connected through a chain, the gear A6 and the gear B8 are matched with each other, a sprocket C9 is sleeved on the fluted disc connecting shaft 4 positioned outside the housing 2, a second flywheel is arranged on the fluted disc connecting shaft 4 between the housing 2 and the sprocket C9, the second flywheel is used for driving the sprocket C9 to rotate forward when the fluted disc connecting shaft 4 rotates forward, and the sprocket C9 can rotate reversely.

The second flywheel comprises an axial thrust device, a sliding sleeve 10 and a chain wheel C mounting sleeve 11, the axial thrust device is located between the shell 2 and the sliding sleeve 10, the sliding sleeve 10 is located between the axial thrust device and the chain wheel C9, the connecting surface of the sliding sleeve 10 and the chain wheel C mounting sleeve 11 is respectively provided with a thorn I12 and a thorn II 13, the thorn I12 and the thorn II 13 are meshed when the fluted disc connecting shaft 4 rotates forwards, the thorn I12 and the thorn II 13 are separated when the chain wheel C9 drives the chain wheel C mounting sleeve 11 to idle, and the chain wheel C mounting sleeve 11 is mounted on the fluted disc connecting shaft 4 through a bearing.

The axial thrust device is an external thread 16 arranged on the fluted disc connecting shaft 4, and an internal thread matched with the external thread 16 is arranged on the inner wall of the sliding sleeve 10.

Example 5.

As shown in fig. 1, a bicycle flywheel capable of forward and backward pedaling comprises a component assembly for forward and backward pedaling of a bicycle, the component assembly is arranged in a shell 2 fixed with a frame 1, a pedal connecting shaft 3 and a fluted disc connecting shaft 4 are connected in the shell 2, a sprocket A5 and a gear A6 which rotate synchronously are arranged on the pedal connecting shaft 3, a sprocket B7 and a gear B8 are arranged on the fluted disc connecting shaft 4 through a flywheel, the sprocket A5 and the sprocket B7 are connected through a chain, the gear A6 and the gear B8 are matched with each other, a sprocket C9 is sleeved on the fluted disc connecting shaft 4 positioned outside the shell 2, a second flywheel is arranged on the fluted disc connecting shaft (4) between the shell 2 and the sprocket C9 and used for driving the sprocket C9 to rotate forward when the fluted disc connecting shaft 4 rotates forward, and the sprocket C9 can rotate independently and reversely.

The second flywheel comprises an axial thrust device, a sliding sleeve 10 and a chain wheel C mounting sleeve 11, the axial thrust device is located between the shell 2 and the sliding sleeve 10, the sliding sleeve 10 is located between the axial thrust device and the chain wheel C9, the connecting surface of the sliding sleeve 10 and the chain wheel C mounting sleeve 11 is respectively provided with a thorn I12 and a thorn II 13, the thorn I12 and the thorn II 13 are meshed when the fluted disc connecting shaft 4 rotates forwards, the thorn I12 and the thorn II 13 are separated when the chain wheel C9 drives the chain wheel C mounting sleeve 11 to idle, and the chain wheel C mounting sleeve 11 is mounted on the fluted disc connecting shaft 4 through a bearing.

The axial thrust device is a spring which is sleeved on the fluted disc connecting shaft 4 and is in a compression state.

Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.

Claims (10)

1. The utility model provides a just pedal flywheel for bicycle that anti-pedaling can both move ahead, it is including realizing that the bicycle just pedals the part assembly that anti-pedaling can both move ahead, the part assembly sets up in casing (2) fixed with frame (1), it has pedal connecting axle (3) and fluted disc connecting axle (4) to be connected in casing (2), be equipped with synchronous pivoted sprocket A (5) and gear A (6) on pedal connecting axle (3), install sprocket B (7) through the flywheel on fluted disc connecting axle (4), gear B (8), sprocket A (5) and sprocket B (7) are connected through the chain, gear A (6) and gear B (8) mutually support, fluted disc connecting axle (4) in the casing (2) outside has cup jointed sprocket C (9), its characterized in that: be equipped with the second flywheel on fluted disc connecting axle (4) between casing (2) and sprocket C (9), the second flywheel is used for when fluted disc connecting axle (4) forward rotation, drives sprocket C (9) forward rotation, sprocket C (9) can independent antiport.

2. The freewheel for a bicycle according to claim 1, characterized in that: the second flywheel comprises an axial thrust device, a sliding sleeve (10) and a chain wheel C mounting sleeve (11), the axial thrust device is located between the shell (2) and the sliding sleeve (10), the sliding sleeve (10) is located between the axial thrust device and the chain wheel C (9), a ratchet I (12) and a ratchet II (13) are respectively arranged on the joint face of the sliding sleeve (10) and the chain wheel C mounting sleeve (11), the ratchet I (12) and the ratchet II (13) are meshed when the fluted disc connecting shaft (4) rotates forwards, the ratchet I (12) and the ratchet II (13) are separated when the chain wheel C (9) drives the chain wheel C mounting sleeve (11) to idle, and the chain wheel C mounting sleeve (11) is mounted on the fluted disc connecting shaft (4) through a bearing.

3. The freewheel for a bicycle according to claim 2, characterized in that: the axial thrust device comprises a positioning column (14) and a sliding sleeve limiting device which are arranged on the fluted disc connecting shaft (4), the sliding sleeve limiting device limits the rotation and the axial movement of the sliding sleeve (10), a thorn-shaped opening (15) is formed in the end face, close to the shell (2), of the sliding sleeve (10), and the positioning column (14) is positioned at the inner bottom of the thorn-shaped opening (15) when the thorn I (12) and the thorn II (13) are separated; when the fluted disc connecting shaft (4) rotates forwards, the positioning column (14) is positioned at the opening end of the thorn-shaped opening (15).

4. The freewheel for a bicycle according to claim 3, characterized in that: the sliding sleeve limiting device comprises a clamping part (17) arranged on the sliding sleeve (10), a guide rod (18) which is consistent with the axial direction of the fluted disc connecting shaft (4) is arranged on the shell (2), and a guide hole which is matched with the guide rod (18) is arranged on the clamping part (17).

5. The freewheel for a bicycle according to claim 4, characterized in that: the clamping part (17) comprises two semicircular hoops with one ends fixed with each other, the free ends of the semicircular hoops are provided with connecting arms, the connecting arms are provided with opposite through holes, the through holes are connected with bolts and fastening screws (19), and the guide holes are positioned at the connecting parts of the two semicircular hoops.

6. The freewheel for a bicycle according to claim 3, characterized in that: the sliding sleeve limiting device is a protruding sliding block arranged on the sliding sleeve (10) and a sliding groove connected to the shell (2), and the sliding block is located in the sliding groove.

7. The freewheel for a bicycle according to claim 3, characterized in that: the sliding sleeve limiting device is a tooth strengthening fit of the sliding sleeve (10) and the fluted disc connecting shaft (4).

8. The bicycle freewheel according to claim 2 characterized in that: the axial thrust device is an external thread (16) arranged on the fluted disc connecting shaft (4), and an internal thread matched with the external thread (16) is arranged on the inner wall of the sliding sleeve (10).

9. The bicycle freewheel according to claim 2 characterized in that: the axial thrust device is a spring which is sleeved on the fluted disc connecting shaft (4) and is in a compression state.

10. The freewheel for a bicycle according to any one of claims 1-9, characterized in that: a limiting ring is arranged on the fluted disc connecting shaft (4), a snap spring for limiting the position of the chain wheel C (9) is arranged on the limiting ring, and a limiting screw of the chain wheel C (9) is arranged at the outer end of the fluted disc connecting shaft (4).

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