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Centrifugal mechanism used for automatic shifting

A centrifugal mechanism and automatic gear shifting technology, applied in the direction of automatic clutches, clutches, mechanical equipment, etc., can solve the problems of poor stability and complex structure, and achieve the effect of high stability, good stability and improving centrifugal force.

Active Publication Date: 2017-03-29
ZHANGJIAGANG CHUANJUN VEHICLE IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Internal derailleurs are divided into manual internal derailleurs and fully automatic internal derailleurs. Existing fully automatic internal derailleurs for bicycles generally control the switching status of the pawls through the centrifugal work of several centrifugal blocks. The structure is complex and the stability is poor.

Method used

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  • Centrifugal mechanism used for automatic shifting
  • Centrifugal mechanism used for automatic shifting
  • Centrifugal mechanism used for automatic shifting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] ginseng Figure 1 to Figure 3 As shown, the present invention discloses a centrifugal mechanism for automatic shifting, which is mainly composed of a ratchet 1, a pawl fixing frame 2, three pawl parts 3 and three linkage parts 4, wherein the three pawls The piece 3 and the three linkage pieces 4 are arranged between the ratchet 1 and the pawl fixing frame 2 and are arranged at intervals in the circumferential direction, that is, a linkage piece 4 is arranged between every two adjacent pawl pieces 3 .

[0036] The ratchet 1 is located in the ratchet holder 2, and the outer circumference of the ratchet 1 is provided with ratchets 10 evenly arranged.

[0037] The ratchet fixing frame 2 includes an annular base 20 and a plurality of mounting seats 21 extending inward from the inner wall of the annular base 20 , and the mounting seats 21 are provided with pin holes 210 for mounting pins.

[0038] The ratchet member 3 includes a first end portion 30, a second end portion 31 ...

Embodiment 2

[0043] ginseng Figure 4 As shown, the structure of the centrifugal mechanism in this embodiment is the same as that of Embodiment 1, the difference is that, in Embodiment 1, the first end 30 of the ratchet member 3 is limited to the fourth end along the radial direction part 41, the second end 31 of the pawl member 3 in the radial direction is limited to the inner side of the third end 40 of the linkage member 4, and in this embodiment, the fourth end of the linkage member in the radial direction The portion 41 is limited to the inner side of the first end 30 of the pawl member 3 , and the third end 40 of the linkage member 4 is limited to the inner side of the second end 31 of the ratchet member 3 along the radial direction.

[0044] The working principle of the centrifugal mechanism in this embodiment is: the working principle of the centrifugal mechanism in this embodiment is: as the speed of the ratchet fixing frame 2 increases, the counterweight 300 arranged on the first...

Embodiment 3

[0046] refer to Figure 5 As shown, the remaining structural principles of the centrifugal mechanism in this embodiment are the same as those in Embodiment 1, the difference being that the centrifugal mechanism in Embodiment 1 mainly consists of a ratchet 1, a pawl fixing frame 2, and three pawls. Part 3 and three linkage parts 4 are composed of several parts, wherein three pawl parts 3 and three linkage parts 4 are arranged between the ratchet 1 and the pawl fixing frame 2, and are arranged at intervals in the circumferential direction, that is, every A linkage piece 4 is arranged between two adjacent ratchet pieces 3 . The centrifugal mechanism in this embodiment is mainly composed of a ratchet 1, a pawl fixing frame 2, a torsion spring 22, two pawl parts and a linkage part 4, wherein two pawl parts 3 and a linkage part 4, the torsion spring 2 are arranged between the ratchet wheel 1 and the pawl fixing frame 2, and are arranged at intervals in the circumferential direction...

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PUM

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Abstract

The invention relates to a centrifugal mechanism used for automatic shifting. The centrifugal mechanism comprises a ratchet wheel, a pawl fixing frame, a plurality of pawl pieces, one or more linkage pieces and elastic pieces. Each pawl piece comprises a first end portion, a second end portion and a first installation portion and a pawl portion is arranged on the inner wall of the second end portion of each pawl piece. Each linkage piece comprises a third end portion, a fourth end portion and a second installation portion. Clump weights are arranged on the first end portions of the pawl pieces and / or the fourth end portions of the linkage pieces. In the radius direction, the first end portion of each pawl piece is limited to the inner side of the fourth end portion of the corresponding linkage piece, and the second end portion of each pawl piece is limited to the inner side of the third end portion of the corresponding linkage piece; or in the radius direction, the fourth end portion of each linkage piece is limited to the inner side of the first end portion of the corresponding pawl piece, and the third end portion of each linkage piece is limited to the inner side of the second end portion of the corresponding pawl piece. The spring force of a pawl is gradually decreased in centrifugal working, so that the stability of the centrifugal mechanism is improved.

Description

[0001] 【Technical field】 [0002] The invention relates to the field of bicycles, in particular to a centrifugal mechanism for automatic shifting. [0003] 【Background technique】 [0004] Bicycle transmissions are divided into two types: internal transmissions and external transmissions. The external transmission uses an open chain mechanism as the transmission system. The chain is shifted to different flywheels to achieve different chain transmission ratios by switching the shifter installed in front of the bicycle. Since the external derailleur is exposed, it is relatively easy to rust and is easily disturbed by external forces, so regular maintenance is often required. The internal derailleur mainly uses a planetary gear mechanism as the main transmission body, which is sealed inside the hub and passed through multiple layers of special sealing materials. Protection, so rainwater, dust, grease, etc. cannot enter, so there is no need for regular maintenance, and the advantage...

Claims

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Application Information

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IPC IPC(8): F16D43/16
CPCF16D43/16
Inventor 黄英可
Owner ZHANGJIAGANG CHUANJUN VEHICLE IND CO LTD
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