US 12,134,430 B2
Core bar for elastic crawler and elastic crawler using core bar
Tatsuya Kobori, Tokyo (JP)
Assigned to BRIDGESTONE CORPORATION, Tokyo (JP)
Appl. No. 17/277,800
Filed by BRIDGESTONE CORPORATION, Tokyo (JP)
PCT Filed Sep. 10, 2019, PCT No. PCT/JP2019/035491
§ 371(c)(1), (2) Date Mar. 19, 2021,
PCT Pub. No. WO2020/075432, PCT Pub. Date Apr. 16, 2020.
Claims priority of application No. 2018-191072 (JP), filed on Oct. 9, 2018.
Prior Publication US 2021/0316802 A1, Oct. 14, 2021
Int. Cl. B62D 55/24 (2006.01)
CPC B62D 55/244 (2013.01) 3 Claims
OG exemplary drawing
 
1. A core bar for an elastic crawler, the core bar including:
a core bar base that extends in a width direction of an elastic endless belt body and is embedded in the elastic body;
a pair of projection portions that project to an inner circumferential surface side of the elastic body at a center portion in a longitudinal direction of the core bar base; and
a pair of rail portions that project from the core bar base to the inner circumferential surface side of the elastic body on opposite outer sides of the pair of projection portions and each include a track roller support surface supporting a track roller rolling on the inner circumferential surface of the elastic body,
wherein the core bar comprises a pair of rail extension portions that project from the core bar base to the inner circumferential surface side of the elastic body and each include a top surface formed in such a manner as to continue from the track roller support surface, the top surface extending from the rail portion toward the center side in the longitudinal direction of the core bar base,
wherein in each of the rail extension portions, the top surface of the rail extension portion is formed on both sides in the width direction of the core bar with the base sandwiched therebetween, and the top surface formed on the both sides extend from the rail portion to a distal end on the center side in the longitudinal direction of the projection portion, and
wherein the projection portion incudes a head portion and a base portion having smaller dimension in the core bar width direction than the head portion, and in each of the rail extension portions, a dimension in the core bar width direction of the rail extension portion including the base portion and top surfaces on both sides thereof decreases from the rail portion toward the end portion.