To provide a braking device for a travel crane capable of easily allowing a maintenance/inspection work, realizing stable operation, free from environmental contamination, hardly influenced by an environmental temperature.SOLUTION: There is provided a braking device for a travel crane comprising: a brake friction member 5 which performs brake action by performing pressure-contact with/separating from a rail R; a male screw rod 28 which is rotated by an electric motor M; a lifting member 26 which moves vertically and reciprocatingly, screwed to the outside of the male screw rod 28 in an externally-fitted manner; a pair of right and left arm members 6, 6 having the brake friction member 5 provided at its lower end portion; and a spring member 29 which energizes the lifting member 26 always upward; wherein a screwing portion 70 of the lifting member 26 and the male screw rod 28 are configured with a ball screw 71 or a screw which does not satisfy a self-sustaining condition of a screw, wherein the lifting member 26 moves upward with the male screw rod 28 rotated by an urging force of the spring member 29 in a stopped state of the electric motor M, and wherein the lower end portion of the pair of right and left arm members 6, 6 is closed to bring the brake friction member 5 to come in pressure contact with a head side surface 9 of the rail.SELECTED DRAWING: Figure 3
【課題】環境汚染の虞れがなく、環境温度の悪影響をほとんど受けず安定した動作を実現し、保守・点検作業を容易に行える走行クレーンの制動装置を提供する。【解決手段】レールRに対して圧接・離間して制動作用をなす制動摩擦部材5と、電動モータMによって回転する雄ネジ杆28と、雄ネジ杆28に外嵌状に螺合して上下往復移動する昇降部材26と、制動摩擦部材5が下端部に付設された左右一対のアーム部材6,6と、昇降部材26を常時上方へ付勢するバネ部材29と、を備え、昇降部材26と雄ネジ杆28の螺合部70は、ボールねじ71で構成され、又は、ねじの自立条件を満たさないねじで構成され、電動モータMの停止状態で、バネ部材29の付勢力によって昇降部材26が雄ネジ杆28を回転させつつ上方移動し、左右一対のアーム部材6,6の下端部が閉作動して、制動摩擦部材5がレール頭部側面9に圧接するように構成した走行クレーンの制動装置。【選択図】図3
BRAKING DEVICE FOR TRAVEL CRANE
走行クレーンの制動装置
2019-05-23
Patent
Electronic Resource
Japanese
IPC: | B66C Krane , CRANES |