Multi-toothed variable speed flywheel

Abstract

The utility model provides a kind of multi-tooth piece type variable-speed flywheel, it is related to bicycle accessory technical field, including support piece, the support piece includes the connecting portion being connected with bicycle rear wheel axle, the connecting portion side away from bicycle rear wheel axle coaxially fixed connection has base block, the side away from connecting portion of base block is provided with extension, and the side of base block close to extension is formed into first connecting slot by introversive, the extension includes at least one connecting block;The utility model is through the setting of base block, connecting block, connecting ring, first connecting slot and second connecting slot, in use, the required number of connecting block is connected by connecting ring and second connecting slot screwing, forms the chain structure of head and tail joint, subsequently the connecting block assembly of length adjusted is connected by connecting ring and first connecting slot on base block screwing, so that device can be flexibly adjusted according to the actual number of variable-speed flywheel, expand the use range of device.

Description

Technical Field

[0001] This utility model relates to the field of bicycle parts technology, and in particular to a multi-toothed derailleur. Background Technology

[0002] The freewheel is the core component of a bicycle's gear system. It achieves gear shifting through a combination of multiple sprockets with varying numbers of teeth. Its structure includes components such as an outer casing, a core, a jack, and a jack spring. Unidirectional transmission is achieved via a ratchet mechanism. Its working principle is that when pedaling, the chain drives the freewheel to rotate, and the jack engages with the internal teeth to transmit power. When pedaling stops, the jack returns to its original position under the force of the spring, producing a "click" sound. Existing multi-stage freewheels use multiple gears of different diameters to achieve gear shifting. However, the length of the structure supporting these gears in existing devices is fixed. Therefore, in use, a specific gear ratio and number of freewheels can only be supported by a structure of a specific length. The device cannot be adjusted according to the number of freewheels, limiting its application range. Utility Model Content

[0003] To address the shortcomings of the existing technology, this utility model proposes a multi-toothed variable speed flywheel.

[0004] The technical solution of this utility model is implemented as follows:

[0005] A multi-tooth sprocket type freewheel includes a support member. The support member includes a connecting portion connected to the rear wheel axle of a bicycle. A base block is coaxially fixedly connected to the side of the connecting portion away from the rear wheel axle. An extension portion is provided on the side of the base block away from the connecting portion, and a first connecting groove is formed by recessing the side of the base block near the extension portion. The extension portion includes at least one connecting block. A connecting ring is fixedly connected to one side of the connecting block, and a second connecting groove is formed by recessing the other side. Both the second connecting groove and the first connecting groove match the connecting ring. A detachable gear shifting component is directly sleeved on the base block and multiple connecting blocks. A side hole is formed at the center of the axis on the side of the connecting block away from the connecting ring. A limiting component for abutting the gear shifting component is screwed into the side hole.

[0006] Preferably, the limiting member includes a base plate, one side of which is recessed to form a mounting groove, and the other side is protruding and fixedly connected to a connector. The connector matches a side hole, and a limiting portion is provided on the side of the base plate away from the connector. A spring is fixedly connected between the limiting portion and the mounting groove, and part of the limiting portion slides through the base plate and is inserted into the interior of the transmission component.

[0007] Preferably, the limiting part includes a connecting plate, the spring is fixedly connected between the mounting groove and the connecting plate, a plurality of positioning rods are fixedly connected in a ring array on one side of the connecting plate, the spring is located between the plurality of positioning rods, a plurality of guide holes are formed in a ring array on the base plate along its own axis, the mounting groove is located between the plurality of guide holes, and the guide holes match the positioning rods.

[0008] Preferably, the side of the substrate away from the connector is recessed to form a side groove, the mounting groove and the guide hole are both located inside the side groove, and the connecting plate matches the side groove.

[0009] Preferably, the connecting plate has a groove formed by recessing on the side away from the positioning rod.

[0010] Preferably, the transmission component includes a first transmission gear, a second transmission gear, a third transmission gear, a fourth transmission gear, a fifth transmission gear, and a sixth transmission gear arranged coaxially in sequence, with the diameters of the first transmission gear, second transmission gear, third transmission gear, fourth transmission gear, fifth transmission gear, and sixth transmission gear decreasing in size sequentially. Each of the first transmission gear, second transmission gear, third transmission gear, fourth transmission gear, fifth transmission gear, and sixth transmission gear has a positioning groove that matches the base block and the connecting block, and each of the first transmission gear, second transmission gear, third transmission gear, fourth transmission gear, fifth transmission gear, and sixth transmission gear also has multiple positioning holes that match the positioning rod.

[0011] Preferably, the connecting part includes a support plate, the base block is fixedly connected to one side of the support plate, and a base rod is fixedly connected to the side of the support plate away from the base block. A washer is sleeved on the base rod, and positioning protrusions are fixedly connected to both notched ends of the washer.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. This utility model, through the setting of base block, connecting block, connecting ring, first connecting groove and second connecting groove, allows the required number of connecting blocks to be screwed together with the second connecting groove through the connecting ring during use, forming a chain structure with the ends connected. Then, the connecting block assembly with the adjusted length is screwed together with the first connecting groove on the base block through the connecting ring, so that the device can be flexibly adjusted according to the actual number of speed change flywheels, thus expanding the application range of the device.

[0014] 2. This utility model, through the arrangement of side holes, connectors, base plates, springs, connecting plates, and positioning rods, allows the positioning rod to move axially when the connectors are screwed into the side holes. When the connectors are screwed into the side holes, the preload generated by the springs drives the connecting plates to move the positioning rod axially. When the positioning rod passes through the guide holes on the base plates, its end can be inserted into the positioning holes on the transmission components, thereby forming a radial limit on the base plates. This effectively prevents the base plates from rotating accidentally during operation and improves the overall stability of the device during use. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is one of the perspective views of this utility model;

[0017] Figure 2 This is a second perspective view of the present utility model;

[0018] Figure 3 This is the third perspective view of the present utility model;

[0019] Figure 4 This is one of the perspective views of the support component of this utility model;

[0020] Figure 5 This is the second perspective view of the support component of this utility model;

[0021] Figure 6 This is one of the perspective views of the limiting component of this utility model;

[0022] Figure 7 This is the second perspective view of the limiting component of this utility model:

[0023] Figure 8 This is a perspective view of the transmission component of this utility model;

[0024] In the diagram: 1. Support component; 11. Support plate; 12. Washer; 13. Connecting ring; 14. Base block; 15. First connecting groove; 16. Positioning protrusion; 17. Connecting block; 18. Second connecting groove; 19. Side hole; 110. Base rod; 2. Gear transmission component; 21. First gear transmission; 22. Second gear transmission; 23. Third gear transmission; 24. Fourth gear transmission; 25. Fifth gear transmission; 26. Sixth gear transmission; 27. Positioning groove; 28. Positioning hole; 3. Limiting component; 31. Base plate; 32. Side groove; 33. Guide hole; 34. Mounting groove; 35. Spring; 36. Positioning rod; 37. Connecting plate; 38. Pull groove; 39. Connector. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] This utility model provides, for example Figures 1-8 The multi-tooth sprocket type freewheel shown includes a support member 1. The support member 1 includes a connecting part that connects to the rear wheel axle of a bicycle. A base block 14 is coaxially fixedly connected to the side of the connecting part away from the rear wheel axle of the bicycle. An extension part is provided on the side of the base block 14 away from the connecting part, and a first connecting groove 15 is formed by recessing the side of the base block 14 near the extension part. The extension part includes at least one connecting block 17. A connecting ring 13 is fixedly connected to one side of the connecting block 17, and a second connecting groove 18 is formed by recessing the other side. Both the second connecting groove 18 and the first connecting groove 15 are matched with the connecting ring 13. A detachable gear shifter 2 is directly sleeved on the base block 14 and the multiple connecting blocks 17. A side hole 19 is formed at the center of the shaft on the side of the connecting block 17 away from the connecting ring 13. A limiting member 3 for abutting against the gear shifter 2 is screwed into the side hole 19.

[0027] With the above technical solution, before using the device, the connecting part is connected to the rear wheel axle of the bicycle, and the base block 14 is supported by the connecting part. Then, the connecting block 17 is placed on one side of another connecting block 17, so that the connecting ring 13 on the current connecting block 17 is screwed into the second connecting groove 18 on the other connecting block 17, thereby connecting the two connecting blocks 17. Then, according to the above steps, multiple connecting blocks 17 are connected. The length-adjusted connecting block 17 is screwed into the first connecting groove 15 on the base block 14 through the connecting ring 13, so that the length-adjusted connecting block 17 is connected to the base block 14. Then, the gear shifter 2 is sleeved onto the connecting block 17 and the base block 14. Then, the limiting member 3 is screwed into the side hole 19 on the outermost connecting block 17, thereby fixing the limiting member 3. The limiting member 3 abuts against the gear shifter 2, thereby completing the installation of the gear shifter 2, so that the device can be adjusted according to the thickness of the gear shifter 2.

[0028] Specifically, in one embodiment, regarding the aforementioned limiting member 3, as... Figure 3 , Figure 6 and Figure 7 As shown, the limiting member 3 includes a base plate 31. One side of the base plate 31 is recessed to form a mounting groove 34, and the other side is protruding and fixedly connected to a connector 39. The connector 39 matches the side hole 19, and a limiting part is provided on the side of the base plate 31 away from the connector 39. A spring 35 is fixedly connected between the limiting part and the mounting groove 34, and part of the limiting part slides through the base plate 31 and is inserted into the interior of the transmission member 2.

[0029] In this embodiment, after the gear transmission component 2 is fitted onto the connecting block 17 and the base block 14, the connector 39 is screwed into the side hole 19 to clamp the gear transmission component 2 onto the base plate 31. When connecting the connector 39 to the side hole 19, the limiting part needs to be pulled to keep the limiting part separate from the gear transmission component 2. After the connector 39 is fully connected to the side hole 19, the limiting part is released, and the limiting part is pulled back by the spring 35 to insert the limiting part between the base plate 31 and the gear transmission component 2, thereby limiting the gear transmission component 2 and the base plate 31 so that the base plate 31 and the connector 39 cannot rotate accidentally.

[0030] Furthermore, in this utility model, regarding the aforementioned limiting portion, as follows: Figure 3 , Figure 6 and Figure 7 As shown, the limiting part includes a connecting plate 37, a spring 35 is fixedly connected between the mounting groove 34 and the connecting plate 37, a plurality of positioning rods 36 are fixedly connected in a ring array on one side of the connecting plate 37, the spring 35 is located between the plurality of positioning rods 36, a plurality of guide holes 33 are formed in a ring array on the base plate 31 along its own axis, the mounting groove 34 is located between the plurality of guide holes 33, and the guide holes 33 are matched with the positioning rods 36.

[0031] In this embodiment, the spring 35 is supported by the base plate 31, and the connecting plate 37 tends to move towards the base plate 31 by the spring 35. After the base plate 31 is connected to the side hole 19 by the connector 39, the connecting plate 37 is pulled by the spring 35, so that the connecting plate 37 and the positioning rod 36 have a certain tendency to move towards the base plate 31, thereby allowing the connecting plate 37 to drive the positioning rod 36 to move through the guide hole 33 on the base plate 31. After the positioning rod 36 passes through the guide hole 33, it is inserted into the transmission component 2.

[0032] Furthermore, in order to reduce the protrusion of the connecting plate 37, such as Figure 6 As shown, the side of the substrate 31 away from the connector 39 is recessed to form a side groove 32. The mounting groove 34 and the guide hole 33 are both located inside the side groove 32, and the connecting plate 37 matches the side groove 32.

[0033] In this embodiment, when the connecting plate 37 is attached to the substrate 31, the connecting plate 37 is accommodated by the side groove 32 on the substrate 31, thereby reducing the protrusion of the device.

[0034] In addition, in this utility model, in order to facilitate pulling the connecting plate 37, such as Figure 6 As implemented, the side of the connecting plate 37 away from the positioning rod 36 is recessed to form a groove 38.

[0035] In this embodiment, when it is necessary to pull the connecting plate 37, the groove 38 makes it easy to pull the connecting plate 37.

[0036] Specifically, in one implementation, such as Figures 1-3 and Figure 8 As shown, the transmission component 2 includes a first transmission gear 21, a second transmission gear 22, a third transmission gear 23, a fourth transmission gear 24, a fifth transmission gear 25, and a sixth transmission gear 26 arranged coaxially in sequence. The diameters of the first transmission gear 21, the second transmission gear 22, the third transmission gear 23, the fourth transmission gear 24, the fifth transmission gear 25, and the sixth transmission gear 26 decrease sequentially. The first transmission gear 21, the second transmission gear 22, the third transmission gear 23, the fourth transmission gear 24, the fifth transmission gear 25, and the sixth transmission gear 26 are all provided with positioning grooves 27 that match the base block 14 and the connecting block 17. The first transmission gear 21, the second transmission gear 22, the third transmission gear 23, the fourth transmission gear 24, the fifth transmission gear 25, and the sixth transmission gear 26 are also provided with multiple positioning holes 28 that match the positioning rod 36.

[0037] In this embodiment, after the length-adjusted connecting block 17 is connected to the base block 14, the first gear 21, the second gear 22, the third gear 23, the fourth gear 24, the fifth gear 25, and the sixth gear 26 are sequentially fitted onto the connecting block 17 and the base block 14. Then, the base plate 31 is placed on one side of the connecting block 17, and the base plate 31 is screwed into the side hole 19 through the connector 39, so that the base plate 31 is fixed on the connecting block 17. The base plate 31 abuts against the sixth gear 26, and the base plate 31 pulls the spring 35. The spring 35 drives the connecting plate 37 and the positioning rod 36 to move, so that the positioning rod 36 passes through the guide hole 33 on the base plate 31 and is inserted into the positioning hole 28 between the first gear 21, the second gear 22, the third gear 23, the fourth gear 24, the fifth gear 25, and the sixth gear 26, thereby limiting the base plate 31 and preventing the base plate 31 from rotating accidentally.

[0038] Furthermore, in this utility model, regarding the aforementioned connecting portion, as follows: Figures 1-5 As shown, the connecting part includes a support plate 11, a base block 14 is fixedly connected to one side of the support plate 11, and a base rod 110 is fixedly connected to the side of the support plate 11 away from the base block 14. A washer 12 is sleeved on the base rod 110, and positioning protrusions 16 are fixedly connected to the two notched ends of the washer 12.

[0039] In this embodiment, the washer 12 is fitted onto the base rod 110, and then the base rod 110 is connected to the rear wheel axle of the bicycle. The base rod 110 supports the support plate 11, and the support plate 11 supports the base block 14, thereby supporting the first gear 21, the second gear 22, the third gear 23, the fourth gear 24, the fifth gear 25, and the sixth gear 26.

[0040] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multi-toothed variable speed flywheel, characterized in that: The system includes a support member (1), which includes a connecting part connected to the rear wheel axle of a bicycle. A base block (14) is coaxially fixedly connected to the side of the connecting part away from the rear wheel axle of the bicycle. An extension part is provided on the side of the base block (14) away from the connecting part, and a first connecting groove (15) is formed by recessing the side of the base block (14) near the extension part. The extension part includes at least one connecting block (17). A connecting ring (13) is fixedly connected to one side of the connecting block (17), and a second connecting groove (18) is formed by recessing the other side. Both the second connecting groove (18) and the first connecting groove (15) are matched with the connecting ring (13). A detachable gear shifter (2) is directly sleeved on the base block (14) and multiple connecting blocks (17). A side hole (19) is formed at the center of the axis on the side of the connecting block (17) away from the connecting ring (13). A limiting member (3) for abutting against the gear shifter (2) is screwed into the side hole (19).

2. The multi-toothed variable speed flywheel according to claim 1, characterized in that: The limiting member (3) includes a base plate (31). One side of the base plate (31) is recessed to form a mounting groove (34), and the other side is protruding and fixedly connected to a connector (39). The connector (39) matches the side hole (19), and a limiting part is provided on the side of the base plate (31) away from the connector (39). A spring (35) is fixedly connected between the limiting part and the mounting groove (34), and part of the limiting part slides through the base plate (31) and is inserted into the interior of the transmission member (2).

3. The multi-toothed variable speed flywheel according to claim 2, characterized in that: The limiting part includes a connecting plate (37), the spring (35) is fixedly connected between the mounting groove (34) and the connecting plate (37), a plurality of positioning rods (36) are fixedly connected in a ring array on one side of the connecting plate (37), the spring (35) is located between the plurality of positioning rods (36), a plurality of guide holes (33) are opened in a ring array along its own axis on the base plate (31), the mounting groove (34) is located between the plurality of guide holes (33), and the guide holes (33) match the positioning rods (36).

4. The multi-toothed geared flywheel according to claim 3, characterized in that: The substrate (31) is recessed on the side away from the connector (39) to form a side groove (32). The mounting groove (34) and the guide hole (33) are both located inside the side groove (32), and the connecting plate (37) matches the side groove (32).

5. The multi-toothed geared flywheel according to claim 3 or 4, characterized in that: The connecting plate (37) is recessed on the side away from the positioning rod (36) to form a groove (38).

6. The multi-toothed geared flywheel according to claim 3 or 4, characterized in that: The transmission component (2) includes a first transmission gear (21), a second transmission gear (22), a third transmission gear (23), a fourth transmission gear (24), a fifth transmission gear (25), and a sixth transmission gear (26) arranged coaxially in sequence. The diameters of the first transmission gear (21), the second transmission gear (22), the third transmission gear (23), the fourth transmission gear (24), the fifth transmission gear (25), and the sixth transmission gear (26) decrease sequentially. The diameters of the first transmission gear (21), the second transmission gear (22), the third transmission gear (23), the fourth transmission gear (24), the fifth transmission gear (25), and the sixth transmission gear (26) decrease sequentially. The first gear (21), the second gear (22), the third gear (23), the fourth gear (24), the fifth gear (25), and the sixth gear (26) are all provided with positioning grooves (27) that match the base block (14) and the connecting block (17). The first gear (21), the second gear (22), the third gear (23), the fourth gear (24), the fifth gear (25), and the sixth gear (26) are also provided with multiple positioning holes (28) that match the positioning rod (36).

7. The multi-toothed geared flywheel according to any one of claims 1-4, characterized in that: The connecting part includes a support plate (11), the base block (14) is fixedly connected to one side of the support plate (11), and a base rod (110) is fixedly connected to the side of the support plate (11) away from the base block (14). A washer (12) is sleeved on the base rod (110), and a positioning protrusion (16) is fixedly connected to both notched ends of the washer (12).

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