Off-gear preventing self-lock pin for synchronizer of manual transmission

Abstract

The invention discloses a self-lock pin for a synchronizer of a manual transmission. The self-lock pin comprises a buckling-type pedestal, a two-way volute spiral spring and a steel ball. The buckling-type pedestal is provided with a top part, a middle part and a lower half part. The middle part is provided with a shoulder part. The two-way volute spiral spring is installed on the shoulder part of the pedestal. Radial limiting of the steel ball can be achieved through the top part, and the steel ball can be pre-tightened in the pedestal under the elastic matching action of the spring. The invention further discloses the synchronizer with the self-lock pin and the manual transmission. The manual transmission can generate self-lock force to achieve off-gear preventing in the on-gear process. According to the self-lock pin for the synchronizer of the manual transmission, the high-precision small-sized injection molding buckling-type pedestal is adopted to be matched with the innovative two-way volute spiral spring so that spring force can be provided; the structure is compact, mounting and positioning are easy and convenient, and the effect that apt self-lock force can be achieved after a gear sleeve of the synchronizer is geared, and thus trip-over stop of the transmission can be prevented is guaranteed; and meanwhile, reliability of a gear-selection and shifting mechanism using the limiting decoupling design is improved, and hence the gear jittering problem caused by axial vibration of the gear sleeve and a shifting fork transmission shaft system is effectively solved.

Description

technical field [0001] The invention relates to a self-locking pin used for a synchronizer of a manual transmission, in particular to an anti-off synchronizer for a manual transmission including the self-locking pin, and a manual transmission with the anti-off synchronizer. Background technique [0002] The manual gearbox is mainly composed of a gear shaft transmission system, a synchronization system, a shift mechanism and a housing structure. The synchronization system is an important system between the shift mechanism and the transmission system, which requires good synchronization performance when shifting gears. To achieve smooth gearing, it is also necessary to ensure that the synchronous system maintains stable torque transmission during gearing, without jumping gears, and isolates the axial vibration of the shaft teeth from being transmitted to the gear shifting mechanism, thereby improving control comfort. [0003] At present, the manual transmission increases the b...

AI Technical Summary

Problems solved by technology

[0003] At present, the manual transmission increases the back cone angle of the coupling gear and the synchronizer gear sleeve to prevent gear disengagement, but this will easily lead to difficulty in back gearing; or increase the effective coupling axial length of the back cone, which is in line with the compact and lightweight Contradictory design ideas

In addition, the anti-disengagement design usually also adopts the fork limit, that is, after the gear is engaged, the self-locking pin acting on the fork shaft will make the fork touch the fork groove wall of the gear sleeve, and always apply force to the gear sleeve. An axial force prevents the gear sleeve from retreating into the neutral direction, but this structure easily transmits the vibration of the gear shaft system to the outside of the gearbox through the gear sleeve, shift fork, and gear selection mechanism, causing the gear lever to vibrate and directly affecting the control Comfort will also increase the complexity of the processing of the fork shaft, and the existence of the self-locking pin of the fork shaft increases the complexity of the fork system and takes up a lot of space, and the structure is not compact enough

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