PROBLEM TO BE SOLVED: To make, in a negative-pressure type booster, an attachment part in the side of attachment destination member of a tie rod bolt long while preventing a forging apparatus of the tie rod bolt from enlarging its size.SOLUTION: In an attachment part (a rear end part 33) of a tie rod bolt 30 of a negative-pressure type booster in the side of an attachment destination member, there are formed an under-screw part 33d, an extension part 33c and a caulking part 33b in this order from the tip (rear end). A under-screw diameter that is the outer diameter of the under-screw part 33d, an extension part diameter that is the outer diameter of the extension part 33c, and a caulking part diameter that is the outer diameter of the caulking part 33b are set in a manner being larger in this order from the smallest to the largest.SELECTED DRAWING: Figure 2
【課題】負圧式倍力装置において、タイロッドボルトの鍛造装置の大型化を抑制しつつ、タイロッドボルトの取付先部材側の取付部を長くすることを目的とする。【解決手段】負圧式倍力装置のタイロッドボルト30の取付先部材側の取付部(後端部33)は、先端(後端)から順番にネジ下部33d、延長部33cおよびかしめ部33bが形成されている。ネジ下部33dの外径であるネジ下径、延長部33cの外径である延長部径、およびかしめ部33bの外径であるかしめ部径は、この順番で大きくなるように設定されている。【選択図】図2
NEGATIVE-PRESSURE TYPE BOOSTER
負圧式倍力装置
2016-05-30
Patent
Electronic Resource
Japanese
IPC: | B60T Bremsanlagen für Fahrzeuge oder Teile davon , VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF |