发明名称 Shovel
摘要 A shovel includes a turning drive unit. The turning drive unit includes a turning electric motor, a turning speed reducer configured to transmit the rotational driving force of the turning electric motor to a turnable body, a brake unit configured to maintain the turnable body in a state where the turning of the turnable body is stopped, a case forming a space in which the turning speed reducer and the brake unit are lubricated with lubricant oil and accommodated, a collar fixed around an output shaft of the turning speed reducer so as to rotate with the output shaft and covering at least a part of a relief part formed at a time of forming splines on the output shaft, and a sealing member provided between the collar and the case and hermetically sealing the lubricant oil inside the space.
申请公布号 US9279233(B2) 申请公布日期 2016.03.08
申请号 US201414219118 申请日期 2014.03.19
申请人 SUMITOMO HEAVY INDUSTRIES, LTD. 发明人 Okada Takeshi;Inada Akihiko;Matsugi Terukazu;Hiranuma Kazunori
分类号 F16H57/029;E02F9/12;F16H57/04;E02F9/20;F16N1/00 主分类号 F16H57/029
代理机构 IPUSA, PLLC 代理人 IPUSA, PLLC
主权项 1. A shovel, comprising: a turning drive unit, the turning drive unit including a turning electric motor;a turning speed reducer configured to transmit a rotational driving force of the turning electric motor to a turnable body;a brake unit configured to maintain the turnable body in a state where turning of the turnable body is stopped;a case forming a space in which the turning speed reducer and the brake unit are lubricated with lubricant oil and accommodated;a collar fitted around and in contact with a circumferential surface of a first portion of an output shaft of the turning speed reducer so as to rotate with the output shaft, the collar covering said first portion and a second portion of the output shaft, the second portion facing the case across the collar and extending from said first portion so as to gradually decrease in diameter toward an end of the output shaft;a sealing member provided between the collar and the case, the sealing member hermetically sealing the lubricant oil inside the space;an additional turning speed reducer configured to transmit the rotational driving force of the turning electric motor to the turnable body, the additional turning speed reducer being connected to a third portion of the output shaft, the third portion having a spline formed thereon and extending from the second portion toward the end of the output shaft; andan additional case provided separately from said case, the additional case forming an additional space in which the additional turning speed reducer is lubricated and accommodated.
地址 Tokyo JP
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