The invention provides a drum brake device capable of preventing a shaft portion of a support pin from coming out of a web hole and a rod hole. As a support pin (4) for rotatably supporting a parking lever (3) on a web (7a) of a brake shoe (2a), a support pin is used that has a shaft part (21) that is inserted into a web hole (17) and a lever hole (18) from the web hole (17) side, and a head part (22) that is configured integrally with the shaft part (21), has an outer diameter larger than the inner diameter of the web hole (17), and is disposed facing the web (7a). The shaft section (21) has a clearance fitting section (23) that is clearance-fitted into the web hole (17), and a press-fitting section (24) that is press-fitted into the rod hole (18). When the parking rod (3) rotates, the abutting position (X) of the web hole (17) and the clearance embedding part (23) and the abutting position (R) of the parking rod (3) and the supporting body (5) are staggered in the axial direction of the supporting pin (4).
本发明提供一种能够防止支承销的轴部从腹板孔及杆孔脱出的鼓式制动装置。作为将驻车杆(3)能够转动地支承于制动蹄(2a)的腹板(7a)的支承销(4),使用具有轴部(21)和头部(22)的支承销,轴部(21)从腹板孔(17)侧分别插通于腹板孔(17)和杆孔(18),头部(22)与该轴部(21)一体地构成且具有比腹板孔(17)的内径大的外径且与腹板(7a)对置配置,轴部(21)具有游隙嵌合于腹板孔(17)的游隙嵌合部(23)和被压入杆孔(18)的压入部(24)。驻车杆(3)转动时的、腹板孔(17)和游隙嵌合部(23)的抵接位置(X)与驻车杆(3)和支承体(5)的抵接位置(R)在支承销(4)的轴向上错开地配置。
Drum brake device
鼓式制动装置
05.04.2024
Patent
Elektronische Ressource
Chinesisch
Brake rod of drum brake device, drum brake device and heavy vehicle
Europäisches Patentamt | 2022
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