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A Centrifugal Mechanism for Automatic Shifting

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

Active Publication Date: 2018-08-07
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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  • A Centrifugal Mechanism for Automatic Shifting
  • A Centrifugal Mechanism for Automatic Shifting
  • A Centrifugal Mechanism for Automatic Shifting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Participate Figure 1 to Figure 3 As shown, the present invention discloses a centrifugal mechanism for automatic shifting, which is mainly composed of a ratchet wheel 1, a pawl fixing frame 2, three pawl members 3, and three linkage members 4, of which three pawls The member 3 and the three linkage members 4 are arranged between the ratchet wheel 1 and the pawl fixing frame 2, and are arranged at intervals in the circumferential direction, that is, a linkage member 4 is set between every two adjacent pawl members 3.

[0031] The ratchet wheel 1 is located in the pawl fixing frame 2, and the ratchet wheel 1 is provided with evenly arranged ratchet teeth 10 on its outer circumference.

[0032] The pawl 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. The mounting seats 21 are provided with pin holes 210 for mounting pins.

[0033] The pawl member 3 includes a first end portion 30, a sec...

Embodiment 2

[0038] Participate 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 pawl member 3 in the radial direction is limited to the fourth end In the inner side of the portion 41, the second end 31 of the pawl 3 in the radial direction is confined to the inner side of the third end 40 of the linkage 4, and in this embodiment, the fourth end of the linkage 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 pawl member 3 in the radial direction.

[0039] 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 pawl holder 2 increases, the counterweight 300 provided on the first end 30 of the ...

Embodiment 3

[0041] Reference Figure 5 As shown, the remaining structural principles of the centrifugal mechanism in this embodiment are the same as those of Embodiment 1, and the difference is that the centrifugal mechanism in Embodiment 1 is mainly composed of a ratchet wheel 1, a pawl holder 2, and three pawls. The piece 3 and the three linkage pieces 4 are composed of several parts, of which the three pawl pieces 3 and the three linkage pieces 4 are arranged between the ratchet wheel 1 and the pawl fixing frame 2, and are arranged at intervals in the circumferential direction, that is, each A linkage member 4 is arranged between two adjacent pawl members 3. The centrifugal mechanism in this embodiment is mainly composed of a ratchet wheel 1, a pawl fixing frame 2, a torsion spring 22, two pawl members and a linkage member 4. Among them, two pawl members 3 and a linkage member 4, a torsion spring 2 is arranged between the ratchet wheel 1 and the pawl holder 2 and arranged at intervals i...

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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

【Technical Field】 [0001] The invention relates to the field of bicycles, in particular to a centrifugal mechanism for automatic gear shifting. 【Background technique】 [0002] Bicycle gearboxes are divided into two types: inner gearbox and outer gearbox. The outer gearbox adopts an open chain mechanism as the transmission system. The chain is shifted to different flywheels to achieve different chain transmission ratios by turning the shifter installed in the front of the bicycle. Because the outer gearbox is exposed, it is more susceptible to rust and is easily disturbed by external forces. Therefore, regular maintenance is often required. The inner gearbox is mainly a planetary gear mechanism as the main transmission body, which is sealed inside the hub, and has passed multiple layers of special sealing materials. Protection, so rain, dust, grease, etc. cannot enter, so there is no need for regular maintenance, thus achieving the advantage of maintenance-free. The internal trans...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16D43/16
CPCF16D43/16
Inventor 黄英可
Owner ZHANGJIAGANG CHUANJUN VEHICLE IND CO LTD
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