CHANGE MECHANISM OF SPEED CHANGE GEAR

• Main Authors: TAKEHASHI KAZUMA, TATSUMI SHOGO, MIZUNO KINYA
• Format: Patent
• Language: English; Japanese
• Published: 10.10.2019
• Subjects: BLASTING; ENGINEERING ELEMENTS AND UNITS; GEARING; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; THERMAL INSULATION IN GENERAL; WEAPONS

To provide a change mechanism of a speed change gear in which a shift arm can be reduced and a small-sized formation of a speed change gear can be attained..SOLUTION: This invention relates to a change mechanism of a speed change gear 1 comprising a detent plate 7 having several recesses 8 at an outer peripheral surface 7e; driven pins 15 protruded from a plate surface of the detent plate 7; a shift arm 25 having a pair of claws 27 oppositely faced to each other over the driven pins 15; a stopper member 9 biased to abut against the outer peripheral surface 7e of the detent plate 7. The adjoining driven pins 15 are arranged to have one wide clearance and other equal-clearances. The detent plate 7 is provided with a circular arc part 7r having an arcuate shape at a part of the outer peripheral surface 7e. When the detent plate 7 is rotated and the driven pins 15 having wide clearance pass by one claw 27, the stopper member 9 is moved along a circular arc part 7r.SELECTED DRAWING: Figure 3 【課題】シフトアームを小さくすることができ、また、変速機の小型化が可能な変速機のチェンジ機構を提供する。【解決手段】外周面７ｅに複数の窪み部８を有するディテント板７と、ディテント板７の板面から突出する従動ピン１５と、従動ピン１５を跨いで対向する一対の爪部２７を有するシフトアーム２５と、ディテント板７の外周面７ｅに当接するように付勢されたストッパ部材９と、を備える変速機１のチェンジ機構であって、隣り合う従動ピン１５は、１つの間隔が広く、その他は等間隔に配置され、ディテント板７には、外周面７ｅの一部に円弧形状を有する円弧部７ｒが設けられ、ディテント板７が回転し、間隔の広い従動ピン１５間が一方の爪部２７を通過する際に、ストッパ部材９は円弧部７ｒに沿って移動する。【選択図】図３