Rear derailleur of bicycle

Abstract

The utility model discloses a bicycle rear derailleur which comprises a base device, a connecting plate, an adjusting assembly and an extending assembly, the adjusting assembly is arranged on the front side of the connecting plate, the adjusting assembly comprises an adjusting frame, a torsional spring, a first buckle, a second buckle, a rotating ring, a connecting block, an arc-shaped plate and an adjusting spring, and the adjusting frame is rotationally installed on the front side of the connecting plate; and the torsional spring is fixedly mounted between the adjusting frame and the connecting plate. According to the rear derailleur, a user can conveniently adjust the rotating force of the rotating plate according to actual requirements through the arranged adjusting assembly, so that the using flexibility of the rear derailleur is improved, and the using effect of the rear derailleur is improved. According to the rear derailleur, the position of the extension gear can be extended through the arranged extension assembly, so that the rear derailleur is adaptive to chains with different lengths, and the use flexibility of the rear derailleur is improved. And through the arranged adjusting spring, the second buckle can be extruded to be reset, and therefore the adjusting efficiency of the rear derailleur is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of rear derailleurs, in particular to a bicycle rear derailleur. Background Art

[0002] The rear derailleur is provided as part of the drivetrain to perform two basic functions: The primary function of the rear derailleur is to selectively switch the bicycle chain of the drivetrain among a series of cogwheels of different diameters attached to the rear wheel. The switching of the bicycle chain from one cogwheel to another at the rear wheel is accomplished in order to change the gear ratio of the drivetrain. Another function of the rear derailleur is to apply tension to the chain in the chain on the non-drive side of the drivetrain to absorb slack, as well as to maintain a desired tension.

[0003] For example, the patent application with application number CN202221565244.0 includes a base member, a connecting rod assembly, a movable member and a chain guide; the chain guide is rotatably connected to the movable member through a bias damping integrated structure, and the bias damping integrated structure includes an intermediate mounting seat, a pivot shaft, a bias torsion spring and a damping torsion spring; the intermediate mounting seat is fixedly connected to the chain guide; one end of the pivot shaft is fixedly connected to the movable member through a screw, and the other end is rotatably connected to the intermediate mounting seat; the two ends of the bias torsion spring are respectively fixedly connected to the movable member and the intermediate mounting seat; the damping torsion spring is sleeved on the pivot shaft, and the mounting arm of the damping torsion spring is fixedly connected to the intermediate mounting seat; along the axial direction of the pivot shaft, the rotation direction of the damping torsion spring is the same as that of the bias torsion spring. The bicycle rear derailleur is not only easy to disassemble and maintain, but also has low manufacturing difficulty and cost.

[0004] However, when the above-mentioned rear derailleur is in use, the rotation force of the chain guide cannot be adjusted. If the rotation force of the chain guide is large, the force required by the user to replace the sprockets using the rear derailleur increases. If the rotation force of the chain guide is small, the chain may be detached from the chain guide due to the bumps of the bicycle when riding on rough terrain, thereby making the rear derailleur unusable. It is urgent to design a bicycle rear derailleur to solve the above-mentioned problems. Utility Model Content

[0005] The utility model aims to provide a bicycle rear derailleur to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] It includes a base device, a connecting plate, an adjustment component and an extension component, wherein the adjustment component is arranged on the front side of the connecting plate, and the adjustment component includes an adjustment frame, a torsion spring, a first clip, a second clip, a rotating ring, a connecting block, an arc plate and an adjustment spring. The adjustment frame is rotatably installed on the front side of the connecting plate, the torsion spring is fixedly installed between the adjustment frame and the connecting plate, the rotating ring is rotatably installed on the front side of the connecting plate, and the first clip is fixedly installed on the inner surface of the rotating ring.

[0008] The arranged adjustment component can facilitate the user to adjust the rotation force of the rotating plate according to actual needs, thereby increasing the flexibility of the rear derailleur when in use, thereby increasing the use effect of the rear derailleur.

[0009] The position of the extension gear can be extended by the provided extension assembly to adapt to chains of different lengths, thereby improving the flexibility of the rear derailleur when in use.

[0010] The arranged adjustment spring can squeeze the second buckle to reset it, thereby increasing the adjustment efficiency of the rear derailleur.

[0011] A sliding groove is provided on the outer surface of the adjustment frame, the second clip is slidably installed in the sliding groove, the adjustment spring is fixedly installed between the second clips, the connecting block is slidably installed in the sliding groove, the connecting block is fixedly connected to the second clip, and the arc plate is fixedly installed on one side of the connecting block.

[0012] The extension assembly includes a rotating plate, a third buckle, an extension shell, a fourth buckle, an extension spring, a square plate and a control block. The rotating plate is fixedly mounted on the outer surface of the rotating ring, and a square groove is opened on the front side of the rotating plate.

[0013] The third buckle is fixedly installed in the square groove, the extension shell is slidably installed in the square groove, a first groove is opened on one side of the extension shell, and a second groove is opened on one side of the extension shell.

[0014] The fourth clip is slidably installed in the first groove, the extension spring is fixedly installed between the fourth clip and the extension shell, the square plate is slidably installed in the square groove, the square plate is fixedly connected to the extension shell, the control block is slidably installed in the second groove, and the control block is fixedly connected to the fourth clip.

[0015] The connecting plate is fixedly mounted on the bottom of the base device, a first U-shaped plate is fixedly mounted on one side of the connecting plate, a shift gear is rotatably mounted in the first U-shaped plate, a second U-shaped plate is fixedly mounted on one side of the square plate, an extension gear is rotatably mounted in the second U-shaped plate.

[0016] In the above technical solution, the utility model provides a bicycle rear derailleur, which has the following beneficial effects:

[0017] 1. The setting adjustment component can facilitate the user to adjust the rotation force of the rotating plate according to actual needs, thereby increasing the flexibility of the rear derailleur when used, thereby increasing the use effect of the rear derailleur.

[0018] 2. The extension assembly can be used to extend the position of the extension gear to adapt to chains of different lengths, thereby improving the flexibility of the rear derailleur when used.

[0019] 3. The second buckle can be squeezed and reset by the provided adjustment spring, thereby increasing the adjustment efficiency of the rear derailleur. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0021] Figure 1 The utility model provides a schematic diagram of the rear derailleur structure of a bicycle rear derailleur embodiment.

[0022] Figure 2 The utility model is a schematic cross-sectional structure diagram of a rear derailleur for a bicycle provided in an embodiment of the utility model.

[0023] Figure 3 The present invention is a schematic diagram of the structure of an adjustment assembly provided in an embodiment of a bicycle rear derailleur according to the present invention.

[0024] Figure 4 The present invention is a schematic diagram of the structure of an extension assembly provided in an embodiment of a bicycle rear derailleur according to the present invention.

[0025] 1. Base device; 2. Connecting plate; 3. Adjustment assembly; 4. Extension assembly; 5. Adjustment frame; 6. Torsion spring; 7. First buckle; 8. Second buckle; 9. Rotating ring; 10. Connecting block; 11. Arc plate; 12. Slide groove; 13. Adjustment spring; 14. Rotating plate; 15. Third buckle; 16. Extension shell; 17. Fourth buckle; 18. Extension spring; 19. Square plate; 20. Control block; 21. Square groove; 22. First groove; 23. Second groove; 24. First U-shaped plate; 25. Shift gear; 26. Second U-shaped plate; 27. Extension gear. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0027] like Figure 1-4 As shown, a bicycle rear derailleur is provided in an embodiment of the utility model.

[0028] It includes a base device 1, a connecting plate 2, an adjustment component 3 and an extension component 4. The adjustment component 3 is arranged on the front side of the connecting plate 2. The adjustment component 3 includes an adjustment frame 5, a torsion spring 6, a first clip 7, a second clip 8, a rotating ring 9, a connecting block 10, an arc plate 11 and an adjustment spring 13. The adjustment frame 5 is rotatably installed on the front side of the connecting plate 2, the torsion spring 6 is fixedly installed between the adjustment frame 5 and the connecting plate 2, the rotating ring 9 is rotatably installed on the front side of the connecting plate 2, and the first clip 7 is fixedly installed on the inner surface of the rotating ring 9.

[0029] The setting of the adjustment component 3 enables the user to adjust the rotation force of the rotating plate 14 according to actual needs, thereby increasing the flexibility of the rear derailleur in use and thus increasing the use effect of the rear derailleur.

[0030] The extending assembly 4 can extend the position of the extending gear 27 to adapt to chains of different lengths, thereby improving the flexibility of the rear derailleur when in use.

[0031] The provided adjustment spring 13 can squeeze the second buckle 8 to reset it, thereby increasing the adjustment efficiency of the rear derailleur.

[0032] Reference Figure 3 In this embodiment, a slide groove 12 is provided on the outer surface of the adjustment frame 5, the second clip 8 is slidably installed in the slide groove 12, the adjustment spring 13 is fixedly installed between the second clips 8, the connecting block 10 is slidably installed in the slide groove 12, the connecting block 10 is fixedly connected to the second clip 8, and the arc plate 11 is fixedly installed on one side of the connecting block 10.

[0033] Reference Figure 4 The extension component 4 of this embodiment includes a rotating plate 14, a third clip 15, an extension shell 16, a fourth clip 17, an extension spring 18, a square plate 19 and a control block 20. The rotating plate 14 is fixedly mounted on the outer surface of the rotating ring 9, and a square groove 21 is opened on the front side of the rotating plate 14.

[0034] Reference Figure 2 In this embodiment, the third buckle 15 is fixedly installed in the square groove 21, and the extension shell 16 is slidably installed in the square groove 21. A first groove 22 is opened on one side of the extension shell 16, and a second groove 23 is opened on one side of the extension shell 16.

[0035] The fourth clip 17 is slidably installed in the first groove 22, the extension spring 18 is fixedly installed between the fourth clip 17 and the extension shell 16, the square plate 19 is slidably installed in the square groove 21, the square plate 19 is fixedly connected to the extension shell 16, the control block 20 is slidably installed in the second groove 23, and the control block 20 is fixedly connected to the fourth clip 17.

[0036] The connecting plate 2 is fixedly mounted on the bottom of the base device 1 , a first U-shaped plate 24 is fixedly mounted on one side of the connecting plate 2 , a shift gear 25 is rotatably mounted inside the first U-shaped plate 24 , a second U-shaped plate 26 is fixedly mounted on one side of the square plate 19 , an extension gear 27 is rotatably mounted inside the second U-shaped plate 26 .

[0037] Working principle: First, install the rear derailleur on the bicycle through the base device 1, and then put the chain on the bicycle gear plate, the shift gear 25 and the extension gear 27. After the chain is put on, hold the extension shell 16 and squeeze the control block 20. The control block 20 drives the fourth buckle 17 to move and shrink it into the extension shell 16. The fourth buckle 17 squeezes the extension spring 18 to release its limit on the extension shell 16. Move the extension shell 16 to drive the square plate 19 to move. The square plate 19 drives the extension gear 27 to move through the second U-shaped plate 26 to adjust the position of the extension gear 27. After the position adjustment of the extension gear 27 is completed, refer to the above steps, release the control block 20, and extend the spring 18. 8 squeezes the fourth buckle 17, the fourth buckle 17 limits the extension shell 16 through the third buckle 15, and then one hand holds the rotating plate 14 to limit it, and the other hand holds the adjustment frame 5 and squeezes the arc plate 11, the arc plate 11 drives the second buckle 8 to move and shrink it through the connecting block 10, and the second buckle 8 squeezes the adjustment spring 13 to release the limitation on the adjustment frame 5, twisting the adjustment frame 5 drives the torsion spring 6 to rotate, so that it adjusts the rotation force of the torsion spring 6, after the rotation force of the torsion spring 6 is adjusted, refer to the above steps, loosen the arc plate 11 and the rotating plate 14, the adjustment spring 13 squeezes the second buckle 8, and the second buckle 8 limits the adjustment frame 5 through the first buckle 7.

[0038] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A bicycle rear derailleur, comprising a base device (1), a connecting plate (2), an adjustment assembly (3) and an extension assembly (4), characterized in that: The adjustment component (3) is arranged on the front side of the connecting plate (2), and the adjustment component (3) comprises an adjustment frame (5), a torsion spring (6), a first buckle (7), a second buckle (8), a rotating ring (9), a connecting block (10), an arc plate (11) and an adjustment spring (13); the adjustment frame (5) is rotatably mounted on the front side of the connecting plate (2); the torsion spring (6) is fixedly mounted between the adjustment frame (5) and the connecting plate (2); the rotating ring (9) is rotatably mounted on the front side of the connecting plate (2); and the first buckle (7) is fixedly mounted on the inner surface of the rotating ring (9).

2. A bicycle rear derailleur according to claim 1, characterized in that: The outer surface of the adjustment frame (5) is provided with a slide groove (12), the second clip (8) is slidably installed in the slide groove (12), the adjustment spring (13) is fixedly installed between the second clips (8), the connecting block (10) is slidably installed in the slide groove (12), the connecting block (10) is fixedly connected to the second clip (8), and the arc plate (11) is fixedly installed on one side of the connecting block (10).

3. A bicycle rear derailleur according to claim 1, characterized in that: The extension assembly (4) comprises a rotating plate (14), a third buckle (15), an extension housing (16), a fourth buckle (17), an extension spring (18), a square plate (19) and a control block (20); the rotating plate (14) is fixedly mounted on the outer surface of the rotating ring (9); and a square groove (21) is provided on the front side of the rotating plate (14).

4. A bicycle rear derailleur according to claim 3, characterized in that: The third buckle (15) is fixedly installed in the square groove (21), the extension shell (16) is slidably installed in the square groove (21), a first groove (22) is opened on one side of the extension shell (16), and a second groove (23) is opened on one side of the extension shell (16).

5. A bicycle rear derailleur according to claim 4, characterized in that: The fourth buckle (17) is slidably mounted in the first groove (22), the extension spring (18) is fixedly mounted between the fourth buckle (17) and the extension shell (16), the square plate (19) is slidably mounted in the square groove (21), the square plate (19) is fixedly connected to the extension shell (16), the control block (20) is slidably mounted in the second groove (23), and the control block (20) is fixedly connected to the fourth buckle (17).

6. A bicycle rear derailleur according to claim 4, characterized in that: The connecting plate (2) is fixedly mounted on the bottom of the base device (1); a first U-shaped plate (24) is fixedly mounted on one side of the connecting plate (2); a shifting gear (25) is rotatably mounted inside the first U-shaped plate (24); a second U-shaped plate (26) is fixedly mounted on one side of the square plate (19); an extending gear (27) is rotatably mounted inside the second U-shaped plate (26).

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